 Patent Application Title |
Patent App Num. |
Date |
| Apparatus for calculating absolute difference | 20110022647 | 20110127 |
| Provided is an apparatus for calculating an absolute difference capable of efficiently performing an absolute difference using an adder. The apparatus for calculating an absolute difference includes a comparator comparing values of two integers, first and second selectors each selecting and outputting one of the two integers according to the comparison results of the comparator, an inverter complementing the result value selected by the second selector; and an adder adding up the result value selected by the first selector, the value complemented by the inverter, and 1.
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| Method for detecting an electrical fault in an electrical network of a motor vehicle | 20110022261 | 20110127 |
| A method for detecting an electrical fault in an electrical network of a motor vehicle, the network having at least one battery, at least one pulse-controlled inverter and at least one d.c. voltage converter, and an intermediate circuit current associated with the pulse-controlled inverter being detected with the aid of an intermediate circuit current sensor. A battery current associated with the battery is detected with the aid of a battery current sensor and a d.c. voltage converter current associated with the d.c. voltage converter is detected with the aid of a d.c. voltage converter current sensor, and the magnitude of the detected intermediate circuit current is compared with an intermediate circuit current determined by calculation with the aid of the battery current sensor and the d.c.... |
| Fuel cell system | 20110020715 | 20110127 |
| [Solution] The system comprises a reforming apparatus 21 for generating reformed gas from fuel gas, a fuel cell 11 capable of generating electric power with reformed gas and oxidizer gas, a cooling passage 80 opening to the outside of a casing 70 for leading cooling air which cools an interior of the casing, into a receiving space in the interior of the casing through an inverter system 15, an air blower 31 for introducing cooling air from the outside of the casing to the cooling passage, and a breaker for cutting off a circuit to a power line when the fuel cell system falls in abnormality or is to be subjected to maintenance, wherein the casing receives the reforming apparatus, the fuel cell, the inverter system,... |
| Motor-driven compressor | 20110020153 | 20110127 |
| A motor-driven compressor includes a compression mechanism for compressing refrigerant, an electric motor for driving the compression mechanism, an inverter for controlling the operation of the electric motor, and a motor harness for electrically connecting the electric motor to the inverter. The compression mechanism and the electric motor are mechanically connected each other. The electric motor has first and second coil ends. The first coil end is located on the side of the compression mechanism and the inverter is located on the side of the second coil end. The motor harness is led out from the first coil end.
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| Amplifier, optical receiver circuit, optical module and data exchange system | 20110020011 | 20110127 |
| When a conventional optical receiver circuit is used, it is difficult to achieve noise reduction or provide a multichannel capability due to a considerable circuit area increase. Disclosed is an amplifier for optical communications that includes a CMOS inverter, which has a PMOS transistor and an NMOS transistor; an input terminal, which inputs a signal into the CMOS inverter; an output terminal, which outputs a signal from the CMOS inverter; a power supply, which is connected to the CMOS inverter; a first element and a second element, which are respectively connected to the CMOS inverter; and two types of power supply paths, which are in opposite phase to each other.
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| Drive circuit | 20110019454 | 20110127 |
| The present invention relates to a DC to AC inverter comprising a plurality of voltage controlled switching devices, where one or more of the voltage controlled switching devices is driven by a drive circuit comprising: a bridge switching circuit (59), a transformer (28) with a primary winding (29) and a secondary-winding (30), a transition selection circuit (60) coupled to a control terminal of a respective voltage controlled switching device (40) of the inverter, at least one inductance (37) that forms at least one resonant circuit with the input capacitance (41) of the control terminal, wherein the bridge switching circuit (59) can be operated to generate drive pulses via the selection circuit (60) to operate the respective voltage controlled switching device (40).
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| Semiconductor integrated circuit | 20110018584 | 20110127 |
| A semiconductor integrated circuit comprises a state holding circuit that inputs an output of one inverter to another inverter with each other; an input circuit that causes a state of the state holding circuit to transition based on a data signal; a first first-conductive transistor that is inserted between an input of the one inverter and an output of the another inverter and is controlled by the data signal; and a first second-conductive transistor that is connected in parallel with the first first-conductive transistor and is controlled by the data signal.
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| Methods, systems and apparatus for detecting abnormal operation of an inverter sub-module | 20110018578 | 20110127 |
| Methods and apparatus are provided for determining whether one or more inverter sub-modules of an inverter module is operating properly. Amplitude of each stator current signal is regularly measured. For each current signal, a positive counter counts a number of consecutive times the amplitude of that current signal is less than a positive current threshold, while a negative counter counts a number of consecutive times the amplitude of that current signal is greater than a negative current threshold. If the positive counter or the negative counter exceeds a maximum count, it is determined that an inverter sub-module is operating abnormally.
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| Power supply control circuit | 20110018491 | 20110127 |
| In order to more rapidly warm up a battery device in a power supply equipped with a fuel cell and a battery device, a fuel-cell-mounted vehicle driving system for driving and controlling a rotating electric machine installed on a vehicle comprises an inverter connected to the rotating electric machine; a power supply circuit having a battery device, a voltage converter, and a fuel cell; and a power supply control device for controlling the power supply circuit. The power supply control device includes an FC output voltage setting module for setting the output voltage of the fuel cell, an OCV avoidance module for, when an FC output voltage is set, avoiding a voltage around an OCV, a battery warm-up control determination module for determining whether the battery... |
| Apparatus and method for driving synchronous motor | 20110018485 | 20110127 |
| The synchronous motor driving apparatus including position sensors provided in the synchronous motor, a current polarity detection circuit for detecting the polarities of the currents in the respective phase windings of the synchronous motor, an inverter driving the synchronous motor, a motor speed calculation unit calculating the rotational speed of the synchronous motor depending on the output signals from the position sensors, a speed control unit outputting a first voltage adjusting component (q-axis current command value Iq*) to cause the rotational speed of the synchronous motor to approach a speed command value and a phase control unit outputting a second voltage adjusting component (d-axis current command value Id*) to cause the phase differences between the phases of the position sensor signals and of the currents in... |
| Discharge lamp lighting apparatus | 20110018460 | 20110127 |
| In an optimum frequency detection sequence of a discharge lamp, the frequency control circuit performs a sweep operation in which, while the frequency control circuit monitors a syntonization degree signal, a frequency control signal is changed, so that frequency is changed, starting from either an upper or lower limit frequency of a periodic driving circuit, in a range that does not exceed the other frequency, wherein after completion of the sweep operation, the frequency control circuit determines a value of the frequency control signal corresponding to a resonance frequency of the resonant circuit, and inputs the value into a frequency driving circuit, wherein at least in a period of the sweep operation, an inverter receives power supply from a sweep time power supply circuit for supplying... |
| Hid lamp ballast with multi-phase operation based on a detected lamp illumination state | 20110018453 | 20110127 |
| An electronic ballast is provided for improved startup and powering of a high pressure discharge lamp. The ballast includes an inverter, a starting circuit for generating a high voltage to ignite the lamp, a controller for controlling an operating frequency of the inverter from startup to steady-state lamp operation, and a lamp output detection circuit. The controller controls the inverter in association with one or more of a first phase in which the starting circuit generates the high voltage and causes dielectric breakdown between the lamp electrodes, a second phase in which an electrode heating operation is performed after dielectric breakdown and a third phase in which steady-state operation of the lamp is performed. A lamp output determination is performed at a predetermined time before shifting... |
| Method and apparatus for multi-source electrical energy grid-tied transformation | 20110018353 | 20110127 |
| A method and apparatuses transform the electrical energy from multiple sources to grid compliant AC voltage. The apparatus according to one embodiment comprises: multiple energy sources (GES 1 to m in FIG. 1) from various power conversion devices; controllers (GER 1 to m in FIG. 1) pumping the maximum available electrical power to the DC inter-source bus; a hybrid inter-source DC bus carrying the electrical power from controllers to inverters and load level information among inverters; and inverters (CNT 1 to k) converting the DC power from the inter-source DC bus to grid compliant AC power.
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| Non-volatile programmable memory cell and array for programmable logic array | 20110018070 | 20110127 |
| A non-volatile programmable memory cell suitable for use in a programmable logic array includes a non-volatile MOS transistor of a first conductivity type in series with a volatile MOS transistor of a second conductivity type. The non-volatile MOS transistor may be a floating gate transistor, such as a flash transistor, or may be another type of non-volatile transistor such as a floating charge-trapping SONOS, MONOS transistor, or a nano-crystal transistor. A volatile MOS transistor, an inverter, or a buffer may be driven by coupling its gate or input to the common connection between the non-volatile MOS transistor and the volatile MOS transistor.
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| Mountable thin film solar array system | 20110017256 | 20110127 |
| A solar power generation system is disclosed. A solar power generation system may include a thin film solar cell array, a micro-inverter connected to the thin film solar cell array, an electric plug interchangeably pluggable into the micro-inverter, and a gateway communications unit connected to the micro-inverter.
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| High efficiency dc compressor and hvac/r system using the compressor | 20110016915 | 20110127 |
| A DC powered compressor and an HVAC/R system having the compressor are disclosed. The compressor comprises an AC powered compressor and a DC/AC inverter configured to receive power from a DC power source and to provide the power to the AC compressor.
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| Method and system for controlling at least one actuator of the cowlings of a turbojet engine thrust inverter | 20110016846 | 20110127 |
| The invention relates to a control system for at least one actuator (6) for the cowlings of a thrust inverter in a turbojet engine, that comprises an assembly of actuation and/or control components. A control means (9) is provided for detecting the failure of an actuation and/or control component (7, 16, 13), for determining the blocking or non-blocking character of the failure for the system operation and, in case of a non-blocking failure, for switching from a nominal operation mode to a failure-adaptation operation mode in which the failure of the actuation and/or control component (7, 16, 13) is compensated at least partially by a modified instruction of the other actuation and/or control components (7, 16, 13).
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| inverter topologies usable with reactive power | 20110013438 | 20110120 |
| The present invention generally relates to power electronic switching circuits and in particular to inverter modules employing two or more controlled switches that can be used with reactive loads. An inverter circuit is provided which comprises first and second input terminals for being connected to a DC power source; first and second output terminals for outputting an AC voltage; at least one metal oxide semiconductor field effect transistor, MOSFET, having a parasitic body diode. The inverter circuit further comprises at least one disabling element for disabling said body diode. This may result in an improved efficiency of the inverter circuit in combination with a reactive power capability. Further, a semiconductor switching device is disclosed, comprising at least one metal oxide semiconductor field effect transistor, MOSFET, and... |
| Dc source assemblies | 20110013429 | 20110120 |
| Embodiments of DC source assemblies of power inverter systems of the type suitable for deployment in a vehicle having an electrically grounded chassis are provided. An embodiment of a DC source assembly comprises a housing, a DC source disposed within the housing, a first terminal, and a second terminal. The DC source also comprises a first capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the first terminal. The DC source assembly further comprises a second capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the second terminal.
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| Clock signal amplifier circuit | 20110012664 | 20110120 |
| A clock signal amplifier circuit includes: an inverter; a coupling capacitor connected to the input of the inverter; two resistors connected in series between the power supply potential and the ground potential, a connection node of the two resistors being connected to the input of the inverter; a feedback resistor provided between the input and output of the inverter; and two switches configured to perform a same open/close operation according to a control signal, the two switches being provided on any two of a supply path of the power supply potential to the inverter, a supply path of the ground potential to the inverter, and a feedback path of the inverter via the feedback resistor.
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| Power-on reset circuit, module including same, and electronic device including same | 20110012651 | 20110120 |
| A power-on reset circuit includes a charge-up circuit to charge a first capacitor after power is on, a first NOR circuit connected to an output terminal of the charge-up circuit and receive a power-on reset signal output from an output terminal of the power-on reset circuit, a first inverter connected to the first NOR circuit, a second capacitor connected between an input terminal of the first NOR circuit and an output terminal of the first inverter, a counter configured to count a clock, a clock selector configured to select whether to output or inhibit a clock signal based on an output signal from the counter, and a second inverter connected to the output terminal of the counter to output the power-on reset signal.
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| Smart and scalable power inverters | 20110012430 | 20110120 |
| A method and apparatus is disclosed for intelligently inverting DC power from DC sources such as photovoltaic (PV) solar modules to single-phase or three-phase AC power to feed the power grid for electricity generation. A number of smart single-input, dual-input, triple-input, quad-input, and multiple-input power inverters in a mixed variety can easily connect to single, dual, triple, quad, and multiple DC power sources, invert the DC power to AC power, and daisy chain together to generate a total power, which is equal to the summation of the AC power supplied by each smart and scalable power inverter of this invention.
... |
| System and device for mechanically extending and retracting landing gear of a semitrailer or chassis | 20110012333 | 20110120 |
| The herein described system is used for mechanically extending and retracting a semi trailer's/chassis landing gear to support, raise or lower the trailer or chassis. Such system utilizes the existing apparatus minus the manual “crank” currently attached to the shaft which, in turn, is attached to the gear reduction box assembly. The manual crank is replaced with an “adapter” on the outboard shaft. This adapter is then attached as needed to a pneumatic, hydraulic, or electrically powered device to turn the shaft thereby mechanically moving the landing/leveling legs into the desired position. The pneumatic device is powered by a connection inherent to the system attached to the semi trailer or tractor's air brake line. The hydraulic device may be powered by an external hydraulic system. The... |
| Induction cooking device | 20110011851 | 20110120 |
| An induction cooking device being capable of heating one target heating object by two or more heating coils and also being capable of displaying the positions of the heating units clearly. The induction cooking device includes a control unit (11) and a plurality of light-emitting parts (21 to 24, etc.). The control unit includes a heating control unit (11 a) that controls the output of an inverter circuit and a light-emission control unit (11b) that controls the light emission. When receiving a command for starting heating of one target heating object by one heating coil from an operation unit (7), the control unit turns on only the light-emitting parts provided near the outer circumference of the heating coil for starting heating, and when receiving a command... |
| Method and apparatus for receiving a universal 3 phase input voltage in a welding power source | 20110011842 | 20110120 |
| A method and apparatus for providing 3 phase input to a welding type power source is disclosed. The power source is capable of receiving wide range of 3 phase input voltage and rectifies the ac input into a dc power capable for welding application. The power source consist of two stages, the first stage is a phase shifted full bridge inverter running near to maximum duty cycle to minimize the losses in the converter which is followed by the second stage buck chopper. This buck chopper deals with wide voltage levels and incorporates a power factor correction circuit
... |
| Induction motor parameter identification | 20110010116 | 20110113 |
| A method and an arrangement are provided for identifying parameters of an induction machine when the induction machine is connected to the output phases of a voltage source inverter and the induction machine is in standstill state. The method includes providing a DC magnetization current (idc—magn) to the induction machine with the inverter, controlling the power semiconductors of the inverter to an off-state, controlling all the output phases of the inverter to the same potential to provide a zero voltage vector, measuring the stator current (isd) during the zero voltage vector, and determining parameters of the induction machine from the stator current (isd) measured during the zero voltage vector.
... |
| Motor cable device | 20110008993 | 20110113 |
| Motors 1 and 2 are electrically connected to inverters 3 and 4 by a motor cable device 5 including connection/interference regulating member 8 which is installed at a predetermined position in a longitudinal direction of cable bodies 6 and 7. If in this connection state the motors 1 and 2 are driven or a vehicle is driven, vibration or impact is transferred to the motor cable device 5 from the motors 1 and 2 or the exterior, and thus the cable bodies 6 and 7 swing in an arrow direction. The swing contributes to the absorption of the vibration or the like.
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| Inverter type scroll compressor | 20110008197 | 20110113 |
| The present invention relates to an inverter type scroll compressor and comprises a housing, a fixed scroll which is set up inside the housing, an orbiting scroll which orbits around the fixed scroll, a driving unit which turns the orbiting scroll, an intake port and a discharge port which are in the housing, and an inverter which faces the front surface of the fixed scroll. An intake hole penetrating to the compression chamber and a discharge hole are respectively formed in the fixed scroll and the orbiting scroll. Accordingly, the present invention is configured so that the coolant is discharged through the discharge hole after the coolant passes through the inverter and the fixed scroll and then flows into the compression chamber.
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| Hinged sail vertical-axis wind generator for residential ground operation | 20110008167 | 20110113 |
| A ground-level vertical-axis wind generator introduces the use of reverse push-away hinges and soft sails specifically made for safe operation in a residential environment. The concave sails harness the wind energy, each one tensioned between two curved support arms, which connect to the central rotor via butt hinges. These hinges and soft sails yield safety to allow the wind generator to operate at ground level. The rotor drives an alternator included in the support structure of the wind generator via a gear assembly. The alternator generates the electricity and a direct current to alternating current power inverter converts the electrical current to match that of the residential utility grid. No installation is required; instead, it operates at ground-level in the backyard, which makes this safe and... |
| Device for driving inverter | 20110007536 | 20110113 |
| Disclosed is a device for driving an inverter having a semiconductor switching element. A gate voltage calculating unit (20) calculates a surge voltage from the temperature, current, and DC-side voltage of each of IGBTs of the inverter and compares the surge voltage with the breakdown voltage of the element. The gate voltage calculating unit (20) commands a gate voltage control unit (22) to set a gate voltage higher than the normal value (reference value) in the case of judging that the difference between the element breakdown voltage and the surge voltage exceeds a predetermined threshold voltage and that a margin exists in the surge voltage. The voltage control unit (22) performs switching control of gates of the IGBTs according to the gate voltage command higher than... |
| inverter topologies usable with reactive power | 20110013438 | 20110120 |
| The present invention generally relates to power electronic switching circuits and in particular to inverter modules employing two or more controlled switches that can be used with reactive loads. An inverter circuit is provided which comprises first and second input terminals for being connected to a DC power source; first and second output terminals for outputting an AC voltage; at least one metal oxide semiconductor field effect transistor, MOSFET, having a parasitic body diode. The inverter circuit further comprises at least one disabling element for disabling said body diode. This may result in an improved efficiency of the inverter circuit in combination with a reactive power capability. Further, a semiconductor switching device is disclosed, comprising at least one metal oxide semiconductor field effect transistor, MOSFET, and... |
| Dc source assemblies | 20110013429 | 20110120 |
| Embodiments of DC source assemblies of power inverter systems of the type suitable for deployment in a vehicle having an electrically grounded chassis are provided. An embodiment of a DC source assembly comprises a housing, a DC source disposed within the housing, a first terminal, and a second terminal. The DC source also comprises a first capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the first terminal. The DC source assembly further comprises a second capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the second terminal.
... |
| Clock signal amplifier circuit | 20110012664 | 20110120 |
| A clock signal amplifier circuit includes: an inverter; a coupling capacitor connected to the input of the inverter; two resistors connected in series between the power supply potential and the ground potential, a connection node of the two resistors being connected to the input of the inverter; a feedback resistor provided between the input and output of the inverter; and two switches configured to perform a same open/close operation according to a control signal, the two switches being provided on any two of a supply path of the power supply potential to the inverter, a supply path of the ground potential to the inverter, and a feedback path of the inverter via the feedback resistor.
... |
| Power-on reset circuit, module including same, and electronic device including same | 20110012651 | 20110120 |
| A power-on reset circuit includes a charge-up circuit to charge a first capacitor after power is on, a first NOR circuit connected to an output terminal of the charge-up circuit and receive a power-on reset signal output from an output terminal of the power-on reset circuit, a first inverter connected to the first NOR circuit, a second capacitor connected between an input terminal of the first NOR circuit and an output terminal of the first inverter, a counter configured to count a clock, a clock selector configured to select whether to output or inhibit a clock signal based on an output signal from the counter, and a second inverter connected to the output terminal of the counter to output the power-on reset signal.
... |
| Smart and scalable power inverters | 20110012430 | 20110120 |
| A method and apparatus is disclosed for intelligently inverting DC power from DC sources such as photovoltaic (PV) solar modules to single-phase or three-phase AC power to feed the power grid for electricity generation. A number of smart single-input, dual-input, triple-input, quad-input, and multiple-input power inverters in a mixed variety can easily connect to single, dual, triple, quad, and multiple DC power sources, invert the DC power to AC power, and daisy chain together to generate a total power, which is equal to the summation of the AC power supplied by each smart and scalable power inverter of this invention.
... |
| System and device for mechanically extending and retracting landing gear of a semitrailer or chassis | 20110012333 | 20110120 |
| The herein described system is used for mechanically extending and retracting a semi trailer's/chassis landing gear to support, raise or lower the trailer or chassis. Such system utilizes the existing apparatus minus the manual “crank” currently attached to the shaft which, in turn, is attached to the gear reduction box assembly. The manual crank is replaced with an “adapter” on the outboard shaft. This adapter is then attached as needed to a pneumatic, hydraulic, or electrically powered device to turn the shaft thereby mechanically moving the landing/leveling legs into the desired position. The pneumatic device is powered by a connection inherent to the system attached to the semi trailer or tractor's air brake line. The hydraulic device may be powered by an external hydraulic system. The... |
| Induction cooking device | 20110011851 | 20110120 |
| An induction cooking device being capable of heating one target heating object by two or more heating coils and also being capable of displaying the positions of the heating units clearly. The induction cooking device includes a control unit (11) and a plurality of light-emitting parts (21 to 24, etc.). The control unit includes a heating control unit (11 a) that controls the output of an inverter circuit and a light-emission control unit (11b) that controls the light emission. When receiving a command for starting heating of one target heating object by one heating coil from an operation unit (7), the control unit turns on only the light-emitting parts provided near the outer circumference of the heating coil for starting heating, and when receiving a command... |
| Method and apparatus for receiving a universal 3 phase input voltage in a welding power source | 20110011842 | 20110120 |
| A method and apparatus for providing 3 phase input to a welding type power source is disclosed. The power source is capable of receiving wide range of 3 phase input voltage and rectifies the ac input into a dc power capable for welding application. The power source consist of two stages, the first stage is a phase shifted full bridge inverter running near to maximum duty cycle to minimize the losses in the converter which is followed by the second stage buck chopper. This buck chopper deals with wide voltage levels and incorporates a power factor correction circuit
... |
| Induction motor parameter identification | 20110010116 | 20110113 |
| A method and an arrangement are provided for identifying parameters of an induction machine when the induction machine is connected to the output phases of a voltage source inverter and the induction machine is in standstill state. The method includes providing a DC magnetization current (idc—magn) to the induction machine with the inverter, controlling the power semiconductors of the inverter to an off-state, controlling all the output phases of the inverter to the same potential to provide a zero voltage vector, measuring the stator current (isd) during the zero voltage vector, and determining parameters of the induction machine from the stator current (isd) measured during the zero voltage vector.
... |
| Motor cable device | 20110008993 | 20110113 |
| Motors 1 and 2 are electrically connected to inverters 3 and 4 by a motor cable device 5 including connection/interference regulating member 8 which is installed at a predetermined position in a longitudinal direction of cable bodies 6 and 7. If in this connection state the motors 1 and 2 are driven or a vehicle is driven, vibration or impact is transferred to the motor cable device 5 from the motors 1 and 2 or the exterior, and thus the cable bodies 6 and 7 swing in an arrow direction. The swing contributes to the absorption of the vibration or the like.
... |
| Inverter type scroll compressor | 20110008197 | 20110113 |
| The present invention relates to an inverter type scroll compressor and comprises a housing, a fixed scroll which is set up inside the housing, an orbiting scroll which orbits around the fixed scroll, a driving unit which turns the orbiting scroll, an intake port and a discharge port which are in the housing, and an inverter which faces the front surface of the fixed scroll. An intake hole penetrating to the compression chamber and a discharge hole are respectively formed in the fixed scroll and the orbiting scroll. Accordingly, the present invention is configured so that the coolant is discharged through the discharge hole after the coolant passes through the inverter and the fixed scroll and then flows into the compression chamber.
... |
| Hinged sail vertical-axis wind generator for residential ground operation | 20110008167 | 20110113 |
| A ground-level vertical-axis wind generator introduces the use of reverse push-away hinges and soft sails specifically made for safe operation in a residential environment. The concave sails harness the wind energy, each one tensioned between two curved support arms, which connect to the central rotor via butt hinges. These hinges and soft sails yield safety to allow the wind generator to operate at ground level. The rotor drives an alternator included in the support structure of the wind generator via a gear assembly. The alternator generates the electricity and a direct current to alternating current power inverter converts the electrical current to match that of the residential utility grid. No installation is required; instead, it operates at ground-level in the backyard, which makes this safe and... |
| Device for driving inverter | 20110007536 | 20110113 |
| Disclosed is a device for driving an inverter having a semiconductor switching element. A gate voltage calculating unit (20) calculates a surge voltage from the temperature, current, and DC-side voltage of each of IGBTs of the inverter and compares the surge voltage with the breakdown voltage of the element. The gate voltage calculating unit (20) commands a gate voltage control unit (22) to set a gate voltage higher than the normal value (reference value) in the case of judging that the difference between the element breakdown voltage and the surge voltage exceeds a predetermined threshold voltage and that a margin exists in the surge voltage. The voltage control unit (22) performs switching control of gates of the IGBTs according to the gate voltage command higher than... |
| Variable frequency drive soft charge circuit | 20110007530 | 20110113 |
| A variable frequency drive comprises a diode rectifier receiving multiphase AC power and converting the AC power to DC power. An inverter receives DC power and converts the DC power to AC power to drive a load. A link circuit is connected between the diode rectifier and the inverter and comprises a DC bus to provide a relatively fixed DC voltage for the inverter. A link capacitor is across the bus. A soft charge circuit limits in rush current to the link capacitor. The soft charge circuit comprises an inductor in the bus and a resistor assist circuit across the inductor along with an anti-parallel clamping thyristor reverse connected also across the inductor.
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| Inverter circuit, backlight device and display device | 20110007099 | 20110113 |
| Provided is an inverter circuit capable of suppressing an increase in EMI level. In at least one embodiment, the inverter circuit includes: a drive circuit for outputting a pulse signal; a transformer for outputting a drive signal corresponding to the pulse signal to a fluorescent lamp, the transformer including a secondary winding having one end connected to the fluorescent lamp; a detection control circuit for detecting a detection signal corresponding to the drive signal supplied to the fluorescent lamp; a wiring line connecting another end of the secondary winding of the transformer and the detection control circuit; and a wiring line provided together with the wiring line so that magnetic fields generated are cancelled out each other.
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| Inverter transformer | 20110006869 | 20110113 |
| An embodiment provides an inverter transformer comprising: a first bobbin around which a first coil is wound, the first bobbin comprising a first through hole; a second bobbin around which a second coil is wound, the second bobbin comprising a second through hole; a spacer between the first and the second bobbins; and a core inserted into the first and the second through holes.
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| Unit inverter having linearly varying delay response characteristic and digitally controlled oscillator including the unit inverter | 20110006851 | 20110113 |
| A Digitally Controlled Oscillator (DCO) including a unit inverter cell whose output frequency linearly varies according to a digital control signal, the unit inverter cell linearly varying a delay response characteristic of an output signal with respect to an input signal supplied from an input terminal, in response to a reference signal and a zeroth control signal, and including a reference cell and a first selecting cell. The reference cell transmits the output signal to an output terminal, wherein the output signal is obtained by reversing a phase of the input signal in response to the reference signal and a reverse reference signal obtained by reversing a phase of the reference signal. The number of transistors forming the reference cell and the first selecting cell and... |
| Latch circuit | 20110006803 | 20110113 |
| A latch circuit includes a feedback circuit having inverter circuits and at least two input terminals and an input circuit for inputting input signals or signals having the same phase as the input signals to the input terminals of the feedback circuit in synchronization with a clock signal. In the feedback circuit section, only when the input signals or the signals having the same phase as the input signals are input to the at least two input terminals at the same time, positive feedback using a predetermined number of amplification stages is applied to the input terminals.
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| Motor drive control apparatus, vehicle with motor drive control apparatus, and motor drive control method | 20110006723 | 20110113 |
| In the hybrid vehicle, a boost converter is controlled to make a post-boost voltage or a voltage on the side of an inverter become a target post-boost voltage corresponding to a target operation point of a motor in accordance with a target post-boost voltage setting map that divides an operation region of the motor into a non-boost region and a boost region when a operation point of the motor is included in the boost region. The target post-boost voltage setting map is prepared so that the non-boost region includes a region in which a loss produced by driving the motor when not boosting the post-boost voltages becomes smaller than the loss produced when boosting the post-boost voltage and the boost region includes a region in which... |
| Inverter device | 20110006718 | 20110113 |
| There is provided an inverter device that is small in size and has high durability against long-term use with vibration. A power substrate 20 is placed at a bottom portion of a box-shaped module case 11, and a control substrate 30 forms a lid of an opening in the module case 11, and thus an inverter device 10 of the present invention is modularized, thereby reducing a height of the inverter device 10. In the inverter device 10, a capacitor 22 is provided between the power substrate 20 and the control substrate 30, and the capacitor 22 is covered with a resin mold layer 12 and fixed in the module case 11. The capacitor 22 is fixed in the module case 11 by the resin mold... |
| Control unit and control method for permanent magnet synchronous motor | 20110006715 | 20110113 |
| If magnitude relations between the output terminal voltage based on a DC negative terminal of the inverter and a threshold voltage that is a fixed value are compared, polarity thereof is changed at a predetermined rotor phase. The magnitude relation, for example, is detected by an inexpensive and simple apparatus such as a level shift circuit and a NOT circuit. The rotor phase of the permanent magnet synchronous motor is inferred on the basis of changes in the magnitude relation and if it is differentiated, a rotation speed is inferred. If the inferred values of the rotor phase and rotation speed are fed back to synchronous operation or vector control, the free-running permanent magnet synchronous motor is restarted.
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| Compact fpga-based digital motor controller | 20110006713 | 20110113 |
| A compact field programmable gate array (FPGA)-based digital motor controller (102), a method, and a design structure are provided. The compact FPGA-based digital motor controller (102) includes a sensor interface (206) configured to receive sensor data from one or more sensors (104) and generate conditioned sensor data. The one or more sensors (104) provide position information for a DC brushless motor (108). The compact FPGA-based digital motor controller (102) also includes a commutation control (210) configured to create switching commands to control commutation for the DC brushless motor (108). The commutation control (210) generates commutation pulses from the conditioned sensor data of the sensor interface (206). The compact FPGA-based digital motor controller (102) also includes a time inverter (208) configured to receive the commutation pulses. The... |
| Charge pump electronic ballast for use with low input voltage | 20110006700 | 20110113 |
| A charge pump electronic ballast for use with low input voltage is described. The charge pump electronic ballast includes a DC/AC inverter circuit having two switching transistors, a resonant circuit having an inductor and a capacitor. The charge pump electronic ballast further includes a voltage multiplying rectifying circuit for transforming low input AC voltage into high output DC voltage, and a charge pump circuit having an inductor and a first pump capacitor.
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| Photovoltaic power system | 20110006609 | 20110113 |
| A photovoltaic power system includes module strings each having photovoltaic modules connected in series. The power system further includes a generator terminal box having DC converters. The power system further includes a generator main connection line and an AC inverter. Each module string is electrically connected to a respective one of the DC converters for the module string to provide a DC voltage generated by the photovoltaic modules of the module string to the respective DC converter. The DC converters output a combined DC voltage based on the DC voltages from the module strings to the AC inverter via the generator main connection line for the AC inverter to transform the combined DC voltage into an AC voltage. The generator terminal box and the AC converter... |
| Control device and control method for vehicle | 20110006598 | 20110113 |
| A vehicle includes a converter for stepping up power provided from a power storage device, and an inverter for converting the power output from converter and outputting it to an alternating-current motor for driving the vehicle. In the vehicle, a rectangular voltage control unit controls the inverter by means of rectangular wave voltage control that is based on a torque command value and the like, so as to control an output torque of the alternating-current motor. A system voltage control unit controls a system voltage, which is an output voltage of the converter. The system voltage control unit lifts a restriction on a system voltage command value based on an accelerator pedal position and the like, and then increases it. When increasing the system voltage command... |
| Computed tomography systems | 20110002446 | 20110106 |
| A power delivery system for computed tomography includes at least one transformer (e.g., an isolation transformer, a coupling transformer, an adaptation transformer), a rotary transformer, and at least two power inverters. The rotary transformer includes a stationary winding disposed on a stationary side and a rotational winding disposed on a rotating side. The isolation or adaptation transformer is coupled to the stationary winding or the rotating winding of the rotary transformer. At least two power inverters are constructed and arranged to provide power to the primary winding of the rotary transformer. The high-voltage unit is disposed on the rotating side and connected to receive power from the rotational winding and constructed to provide power to an X-ray source.
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| Dc/ac power inverter control unit of a resonant power converter circuit, in particular a dc/dc converter for use in a high-voltage generator circuitry of a modern computed tomography device or x-ray radiographic system | 20110002445 | 20110106 |
| The present invention refers to a DC/AC power inverter control unit of a resonant-type power converter circuit (400), in particular a DC/DC converter, for supplying an output power for use in, for example, a high-voltage generator circuitry of an X-ray radio-graphic imaging system, 3D rotational angiography device or X-ray computed tomography device of the fan-or cone-beam type. More particularly, the present invention is directed to a resonant-type power converter circuit out which comprises an interphase transformer (406) connected in series to at least one series resonant tank circuit (403a and 403a′ or 403b and 403b′) at the output of two DC/AC power inverter stages (402a+b) supplying a multi-primary winding high-voltage transformer (404), wherein said interphase transformer (406) serves for removing the difference (DI) in the resonant... |
| Latch type fuse circuit and operating method thereof | 20110002187 | 20110106 |
| A latch type fuse circuit includes a non-volatile memory, a PMOS transistor, and an output circuit. The non-volatile memory cell stores a logic bit. A voltage level of a source of the PMOS transistor determines the latch type fuse operating in the data program status or the data read status. In the data program status, a gate of the PMOS transistor receives a first signal including an address and the logic bit for determining the logic bit written in the non-volatile memory cell. The output circuit includes two NMOS transistors and an inverter. In the data read status, the output circuit can latch the logic bit.
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| Oscillation circuit | 20110001570 | 20110106 |
| An oscillation circuit includes a piezoelectric oscillator, a resistive element, and an exciting circuit connected between an input node and an output node in parallel with one another, a first capacitor connected between the input node and a ground node, and a second capacitor connected between the output node and the ground node. The exciting circuit includes a NAND circuit and first and second inverters that are cascade-connected. Oscillation of the piezoelectric oscillator is started when an enable signal input to the NAND circuit is switched to an H level.
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| Oscillation circuit and semiconductor device having the same | 20110001569 | 20110106 |
| An oscillation circuit and a semiconductor device incorporating same are provided. The oscillation circuit includes an oscillation unit including a plurality of inverters and configured to perform signal transmission between first and second nodes of the inverters such that each of the inverters performs an oscillation operation to generate clock signals having different phases, when a control signal is activated, and latch a clock signal of the second node and cut off the signal transmission between the first and second nodes to stop the oscillation operations of the inverters, when the control signal is deactivated, and a control unit configured to activate the control signal when an oscillation enable signal is activated, and deactivate the control signal using one of a clock signal output from an... |
| 8t low leakage sram cell | 20090323401 | 20091231 |
| This invention discloses a static random access memory (SRAM) cell comprising a pair of cross-coupled inverters connected between a positive supply voltage (Vcc) and a first node, a first NMOS transistor with a gate and drain connected to the first node and a source connected to a ground, and a second NMOS transistor with a drain and source connected to the first node and the ground, respectively, and a gate connected to a control-line.
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| High efficiency photovoltaic inverter | 20090323379 | 20091231 |
| A photovoltaic (PV) inverter includes a single DC to AC converter configured to operate solely in a buck mode for PV array voltage levels greater than a connected power grid instantaneous voltage plus converter margin, and further configured to operate solely in a boost mode for PV array voltage levels plus margin less than the connected power grid instantaneous voltage, such that the PV inverter generates a rectified sine wave current in response to the available PV array power, and further such that the PV inverter generates a utility grid current in response to the rectified sine wave current.
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| Intrinsically safe circuit for driving a solenoid valve at low power | 20090323247 | 20091231 |
| A system and method for providing an intrinsically safe (IS) circuit for driving a solenoid valve at a low power is disclosed. A voltage source generates a first voltage and is connected to a first side of the solenoid valve. A voltage inverter is connected to the voltage source and generates a second voltage from the first voltage. The second voltage is of opposite magnitude to the first voltage. A controller selectively controls the first voltage and the second voltage to be applied to the solenoid valve. In order to actuate the solenoid valve, the first voltage is applied to the first side of the solenoid valve and the second voltage is applied to the second side of the solenoid valve. In order to hold the... |
| Wide angle display device | 20090323186 | 20091231 |
| A wide angle viewing apparatus for security applications is disclosed. The apparatus comprises a wide-angle lens and a diffusing screen. The wide-angle lens incorporates an image inverter and a means for eliminating stray light.
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| Apparatus and method for improving video quality of display device | 20090322733 | 20091231 |
| Provided is an apparatus for improving image quality of a display device including a panel for displaying an image according to an inputted image signal a lamp for illuminating the panel an inverter for applying a drive current to the lamp and a control unit for intermittently applying a driving pulse voltage of the inverter to perform pulse width modulation dimming, and varying an operating frequency of the inverter, wherein the control unit detects frequencies of horizontal and vertical synchronizing signals and varies a pulse width modulation frequency regardless of the horizontal and vertical synchronizing signals.
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| Display device | 20090322731 | 20091231 |
| A display device includes a memory unit formed in each pixel to store video data and including a first inverter circuit whose input terminal is connected to a first node and whose output terminal is connected to a second node and a second inverter circuit whose input terminal is connected to the second node and whose output terminal is connected to the first node, a first transistor connected between the output terminal of the second inverter circuit and the video line, and a second transistor connected between the first node and the video line, in which at the time of reading the video data, the first transistor is turned ON, and the second transistor is turned OFF, to output the video data stored in the memory... |
| Digitally controlled oscillators | 20090322435 | 20091231 |
| Oscillator circuitry is provided that is based on a ring of inverters. The ring of inverters may be single-ended or differential inverters. Digitally controlled adjustable load capacitors may be provided at inverter outputs to tune the oscillator circuitry. Each digitally controlled adjustable load capacitor may be formed from multiple varactors connected in parallel. Each varactor may have a control input that receives a digital control signal. The digitally controlled adjustable load capacitors in a given oscillator may be adjusted in unison to produce the same capacitance value for each capacitor or may be adjusted individually so that they produce different capacitance values. The inverters may include common-mode-gain reduction features such as series-connected current sources, series-connected resistors, and cross-coupled negative feedback transistors.
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| Ac motor driving apparatus and control method | 20090322265 | 20091231 |
| The AC motor driving apparatus has an inverter converting a DC voltage to an AC voltage and supplying the AC voltage to an AC motor; a PWM device controlling a magnitude and a frequency of an output voltage of the inverter and means for changing a time constant of the AC motor in accordance with a carrier frequency of the PWM device. Between the PWM device and the AC motor, there is provided a condenser and/or a coil for adjusting the time constant, and the capacity thereof is adjusted in accordance with the carrier frequency of the PWM device.
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| Discharge lamp ballast and fixture with controlled preheating | 20090322246 | 20091231 |
| A ballast for a discharge lamp includes an inverter including at least one or more switching elements connected to an output end of a DC power source, a control circuit or controlling switching in the inverter, a resonant circuit connectable to a discharge lamp with a thermionic cathode, a load circuit connected to an output end of the inverter, a preheating circuit for preheating a filament of the discharge lamp, and a detection circuit for detecting electrical characteristics associated with a filament resistance of the discharge lamp. The electrical characteristics associated with a filament resistance are detected by the detection circuit to control a preheating amount for the filament, in accordance with a filament resistance value and determined preheating time, so that a ratio of a... |
| Power converter and controller using such power converter for electric rolling stock | 20090322148 | 20091231 |
| Provided is a power converter having an inverter (13) wherein capacitors (12) are connected in parallel on a direct current side, and a power supply circuit configured to supply the inverter with a direct current from a power supply (1) and a power storage element (14). A controller using such power converter is also provided for electric rolling stocks. The power supply circuit is provided with a power supply switch (S1) arranged between the power supply and the inverter, a DC-to-DC converter (15A) arranged between the power storage element and the inverter, and a bypass switch (S2) arranged between the power storage element and the inverter.
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| Drive circuit and method for inverters of wind energy installations | 20090322086 | 20091231 |
| A converter for a wind energy installation and a method. The converter includes an inverter which drives a generator via a plurality of phases and an intermediate circuit having an intermediate-circuit voltage between an upper and a lower intermediate-circuit potential. The generator is driven with phase potentials at a variable frequency. A shift value is calculated between an extreme phase potential and one of the intermediate-circuit potentials, a separation value is determined between a middle phase potential and the closest intermediate-circuit potential, and an additional voltage is generated using the separation value as amplitude. The phase potentials are shifted through the shift value and the additional voltage is added to the middle phase potential. Accordingly, the switching elements in the converter do not need to be... |
| Memory system and memory access method | 20090319867 | 20091224 |
| A memory system has a redundancy coding circuit that performs redundancy coding process for write data, an inverter circuit which inverts values of individual bits of the data that has resulted from the redundancy coding process, a selector which selects the data that has resulted from the redundancy coding process or data that has been inverted by the inverter circuit based on a selecting signal, a memory which stores the selected data, a comparator which compares data read from the memory with the selected data and outputs a comparison result, a write control circuit which generates the selecting signal based on the comparison results, and a redundancy decoding circuit that performs a redundancy decoding process for data read from the memory to output the processed data.
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| Connector | 20090318006 | 20091224 |
| A connector capable of preventing a contact portion of a contact from being damaged. The contact is held by a housing having an accommodating portion for accommodating an inserting portion of an inverter board. The contact has a contact portion which is capable of being brought into contact with the inserting portion accommodated in the accommodating portion along the direction of the thickness of the inverter board. A slider which brings the contact portion of the contact into and out of contact with the inserting portion of an inverter board by sliding is slidably mounted on the housing.
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| Single-phase inverter circuit to condition and transform direct current electric power into alternating current electric power | 20090316458 | 20091224 |
| The invention presents a structure for the conversion of direct current electric power into alternating current electric power, characterised in that it is simple, highly efficient and minimises the problem of electromagnetic compatibility. The circuit includes, in its first preferred embodiment, six switching elements governed by a command unit, four switches forming an H-bridge (T1, T2, T3, T4) and two auxiliary switches (T5D, T6D), and two auxiliary diodes (Daux1 and Daux2). The elements of the H-bridge switch at grid frequency, whereas T5D and T6D switch at high frequency by means of pulse width modulation (PWM), or other appropriate modulation techniques. The voltage of these auxiliary switching elements (T5D, T6D) is limited topologically to half the direct current input voltage (Vin), thereby reducing switching losses and resulting... |
| Inverter | 20090316457 | 20091224 |
| On an inverter for feeding power of a direct voltage source, in particular of a photovoltaic generator (PVG), into an alternating voltage mains (N), with an asymmetrically clocked bridge circuit with at least two first switches (S1, S2) clocked at mains frequency and with at least two second switches (S3, S4) clocked at a higher clock frequency, the efficiency is intended to be improved at low cost. This is achieved in that slow speed switches (S1, S2) of equal temperature stability are utilized for the mains frequency and that fast speed switches (S3, S4) with steeper switching slopes and higher temperature stability are utilized for the higher clock frequency, the fast speed switches (S3, S4) being locally separated from the slow speed switches (S1, S2).
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| Inverter and method for controlling output frequency of inverter | 20090316449 | 20091224 |
| An inverter includes a counter, a PWM generator, a central controller and a power converter. The counter is used for receiving a frame switch signal to generate a frame counting signal. The PWM generator is coupled to the counter, and is used to select a specific frequency among a plurality of predetermined frequencies according to the frame counting signal, and generate a modulated signal having the specific frequency. The central controller is coupled to the PWM generator, and is used to generate a processed signal according to the modulated signal. The power converter is coupled to the central controller, and is used to generate an output signal according to the processed signal.
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| Power inverter circuit for adjusting symmetry of the ac-voltage without load-coupling | 20090316448 | 20091224 |
| The invention relates to a power inverter circuit for coupling a power station to a power supply system. The invention addresses the problem to reduce the risk of damages to components of the power station and the power supply system in the course of coupling action by providing a power inverter circuit for adjusting symmetry of the AC voltage before coupling the inverter output to a load, comprising: first switching means for selectively connecting a positive voltage to the inverter circuit output, second switching means for selectively connecting a negative voltage to the inverter output, and ohmic resistance means coupled in parallel to the inverter output, a controller for selectively switching the first and second switching means with a switching frequency to produce an AC voltage... |
| Circuit arrangement with a relay incorporating one field coil as well as switch contacts | 20090316323 | 20091224 |
| The invention is directed to a circuit array with a relay (K1; K12) incorporating a field coil (E) as well as a switch contact (1a, 1b), said switch contact (1a, 1b) being provided as a switch point between a grid, in particular a mains supply (N), and an inverter (WR) fed by a direct voltage source, in particular by a photovoltaic generator (PVG), said relay (K1; K12) being configured to be a bistable relay.
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| Backlight device, liquid crystal display device, and method for assembling backlight device | 20090316079 | 20091224 |
| A fluorescent tube is prevented from being wrongly attached and broken when being attached, and luminance nonuniformity of backlight due to luminance difference generated in a tube axis direction of the fluorescent tube is reduced. A backlight device 2 is provided with a plurality of fluorescent tubes 21 having electrodes 211 at both ends; a bundling member 213 for bundling wirings 212 pulled out from the electrode 211 on one side of two or more of the fluorescent tubes 21; and a conducting means 31 for achieving conduction between the electrodes of the two fluorescent tubes among the fluorescent tubes 21 by being connected with the bundling member 213. The conducting means 31 permits a current to be carried between the electrodes of the two fluorescent... |
| Liquid crystal display and method for driving the same | 20090315823 | 20091224 |
| A liquid crystal display includes a control unit, an inverter connected to the control unit and a load connected to the inverter. The control unit provides a first control signal and a second control signal to the inverter according to a degree of brightness of an external image signals. The inverter adjusts luminous intensity of the load according to the first control signal and the second control signal. Also provided is a method for driving the liquid crystal display.
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| Charge coupled pump-efficient charge pump regulator with mos capacitor | 20090315615 | 20091224 |
| A charge pump with a MOS-type capacitor, where the MOS-type capacitor is operated in an inversion region in which capacitance varies as a function of the frequency of the applied signal. The charge pump is switched to transfer charge from an input node to the capacitor and from the capacitor to an output node. During a transition interval, a relatively high frequency switching signal is used to lower the capacitance and increase efficiency. During a settling interval, a relatively low frequency switching signal is used, in which case the capacitance is higher, but similar to a level which would be seen if the capacitor was operated in an accumulation region. MOS capacitor dimensions and switching intervals are mutually optimized to provide high efficiency and required throughput.... |
| Integrated circuit devices having level shifting circuits therein | 20090315610 | 20091224 |
| Level shifting circuits generate multiple tracking signals that are in-phase with an input signal, but are also level-shifted with wider voltage swings relative to the input signal. These input tracking signals are provided as separate inputs to an inverter having at least one PMOS pull-up transistor and at least one NMOS pull-down transistor therein. A level shifting circuit may include a differential input circuit, which is responsive to true and complementary input signals. A first load circuit is electrically coupled to the differential input circuit. This first load circuit is configured to generate first and second tracking signals at respective first and second nodes therein. These first and second tracking signals are in-phase, level-shifted versions of each other, and have respective voltage swings that are greater... |
| Logic circuits, inverter devices and methods of operating the same | 20090315590 | 20091224 |
| An inverter device includes at least a first transistor connected between a power source node and ground. The first transistor includes a first gate and a first terminal that are internally capacitive-coupled to control a boost voltage at a boost node. The first terminal is one of a first source and a first drain of the first transistor.
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| Power supply device and vehicle | 20090315518 | 20091224 |
| A power supply device mounted to a hybrid vehicle includes: a capacitor that is chargeable/dischargeable; an electric power input/output unit for inputting/outputting electric power between the capacitor and a charge/discharge device installed external to the hybrid vehicle; a temperature sensor detecting a temperature of the capacitor; and a control device increasing the temperature of the capacitor by performing at least one of charging from the charge/discharge device to the capacitor and discharging from the capacitor to the charge/discharge device when the control device determines based on a detection result of the temperature sensor that the temperature of the capacitor is required to be increased. Thereby, the temperature of the capacitor can be increased without causing a load such as an inverter to consume electric power.
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| Sensorless control apparatus of synchronous motor | 20090315495 | 20091224 |
| A PWM modulation unit modulates a three-phase voltage instruction, which is input, on the basis of a PWM method, and outputs a gate signal to each phase switching element of an inverter. A high-frequency component arithmetic unit calculates, at each time of switching of the inverter, a high-frequency component of a current occurring due to a voltage which is determined by the PWM modulation unit and is output from the inverter. An index arithmetic unit calculates, as an index R proportional to a rotational phase angle estimation error, from the high-frequency component of the current. A rotational phase angle estimation unit executes an estimation arithmetic operation of the rotational phase angle by using the index R. The invention provides a synchronous motor sensorless control apparatus which... |
| Inverter for driving light source | 20090315469 | 20091224 |
| An inverter for driving light source is disclosed. The inverter includes a pulse control unit for producing a conduction period signal, a power switch unit driven by the conduction period signal and a power conversion unit for outputting a driving power, wherein a waveform modulation unit is further connected between the power switch unit and the power conversion unit, and the waveform modulation unit obtains the input power from the power switch unit and converts thereof into a modulation power, wherein the modulation power includes a positive edge modulation period with gradually rising voltage peak and a negative edge modulation period with gradually falling voltage peak, with the positive edge modulation period has a duration longer than that of the negative edge modulation period, and the... |
| Solar power plant | 20090315404 | 20091224 |
| A solar power plant with a plurality of photovoltaic modules for generating a power to be fed in a multi-phase grid, several photovoltaic strings, which are allocated to different phases, being connected to a primary side of a mains transformer and at least one inverter for converting the direct voltage generated by the photovoltaic modules into an alternating mains voltage conforming to the grid being provided and said mains transformer being provided with a neutral conductor and with a grounded terminal, is intended to be improved in such a manner that the life of the photovoltaic modules, in particular in case of thin-film modules, is increased, allowing for high conversion efficiency of the inverters at low wiring costs. This is achieved in that an additional direct... |
| Renewable energy generation system | 20090315336 | 20091224 |
| A plurality of exercise machines each have a generator with a rotating element for creating a current flow. A primary electrical cable is between the input and output ends. A plurality of feed lines couple an associated generator with the primary electrical cable. A diode is in each of the feed lines. Current is allowed to flow from the generators to the primary feed line and any back flow is precluded. A regulator coupled to each feed line is adapted to regulate the voltage of each machine and to maintain such voltage at a constant level. An inverter is coupled to the primary electrical cable. A combiner/controller along the primary electrical cable between the inverter and the feed lines is adapted to combine the current from... |
| Gradient induction heating of a workpiece | 20090314768 | 20091224 |
| An apparatus and process are provided for gradient induction heating or melting of a workpiece with a plurality of induction coils, each of the plurality of induction coils is connected to a power supply that may have a tuning capacitor connected across the input of an inverter. The plurality of induction coils are sequentially disposed around the workpiece. The inverter has a pulse width modulated ac power output that may be in synchronous control with the pulse width modulated ac power outputs of the other power supplies via a control line between the controllers of all power supplies.
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| Voltage conversion apparatus and vehicle including the same | 20090314558 | 20091224 |
| A voltage control portion generates a current command for controlling a voltage to an inverter input voltage command. A dividing portion divides the current command into first and second current commands in accordance with a division ratio from a division ratio setting portion. A first current control portion generates a modulated wave for controlling a current of a first converter to the first current command. A second current control portion generates a modulated wave for controlling a current of a second converter to the second current command.
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| Engine start system with a regulated permanent magnet machine | 20080315584 | 20081225 |
| An electromechanical power transfer system that transfers power between a direct current (DC) electrical power system and a prime mover, comprises: a permanent magnet machine (PMM) comprising a permanent magnet (PM) rotor that rotates a drive shaft of the prime mover, a stator with a multiphase alternating current (AC) winding coupled to the AC bus for developing a rotating magnetic field with a magnetic flux path that causes rotation of the PM rotor and a control coil with a winding that has a configuration to generate a magnetic field with flux that varies the reactance of the stator winding upon the application of current through the control coil; a plurality of AC current sensors for sensing the current in each phase of the multi-phase AC bus... |
| Generator output circuitry for twin turbine wind power generating system | 20080315586 | 20081225 |
| Improved generator output circuitry for twin turbine includes boost DC converters for each of a pair of generators with their output introduced to a single inverter, which serves both generators and converters in common. The inverter output then proceeds in conventional AC form through a disconnect switch to a power grid.
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| Energy converter system with reactive-power-management | 20080315685 | 20081225 |
| A distributed generation system is connected to an AC power line that provides AC electrical power from a source to a load. The distributed generation system includes a DC electrical power source, a capacitor for storing DC electrical power, a converter for converting electrical power stored in the DC electrical power source at a first voltage to a second, greater voltage for storage in the capacitor. The system includes an inverter for inverting the electrical power stored in the capacitor at the second voltage into AC electrical power having a peak voltage less than the second voltage. A controller is provided and operative for controlling the operation of the converter and the inverter to deliver electrical power stored in the DC electrical power source to the... |
| Cooling structure for inverter housing | 20080315736 | 20081225 |
| In a cabinet, an inverter housing is mounted on an inverter housing mounting surface. Heat-exchanger-side pipe connection ports are disposed so as to extend through the inverter housing mounting surface toward a heat exchanger for use as an air-cooling device. Further, controller-mounting-side pipe connection ports are disposed so as to extend on a controller mounting side. A refrigerant supply line is a refrigerant passage through which a refrigerant is cyclically fed from the refrigerant cooling device. One end of the refrigerant supply line is connected to the heat-exchanger-side pipe connection ports or the controller-mounting-side pipe connection ports, while the other end is connected to the refrigerant cooling device that penetrates an appropriate part of a wall of the cabinet and is situated in a proper position... |
| Electronic ballast having a flyback cat-ear power supply | 20080315779 | 20081225 |
| An electronic ballast for driving a gas discharge lamp includes a rectifier to convert an AC mains input voltage to a rectified voltage, a valley-fill circuit for producing a DC bus voltage, an inverter for converting the DC bus voltage to a high-frequency AC voltage for driving the lamp, a control circuit for controlling the inverter, and a flyback cat-ear power supply for supplying current to the inverter when the rectified voltage is less than a predetermined level. The flyback cat-ear power supply also provides power to the control circuit. Preferably, the flyback cat-ear power supply draws current only when the inverter is not drawing current directly from the AC mains, so as to make the input current to the ballast substantially sinusoidal. The result is... |
| Discharge lamp light-up control apparatus and power circuit | 20080315781 | 20081225 |
| The present invention is directed to realize an optimum lamp control with an inexpensive configuration in a discharge lamp light-up control apparatus. A constant current control unit controls light-up of a discharge lamp by transmitting a control signal to an inverter and includes: a storage for storing lamp characteristics of the discharge lamp; and a CPU for obtaining information indicative of a type of the discharge lamp attached, reading the lamp characteristics from the storage based on the obtained type information, and transmitting a control signal to the inverter so that an output corresponding to the read lamp characteristics are obtained.
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| Discharge lamp lighting apparatus and projector | 20080315782 | 20081225 |
| A discharge lamp lighting apparatus for turning on a discharge lamp has a lighting condition in which a projection is formed at a tip of an electrode for electric discharge. In the discharge lamp lighting apparatus, when the polarity-reversal mode is the second mode, the inverter control circuit operates to generate the inverter control signal so that a DC component contained in the output current increases more than that in the first mode, when the polarity-reversal mode is the first mode, and it is detected that the lamp voltage is lower than a predetermined first voltage, the polarity-reversal mode control circuit changes the polarity-reversal mode into the second mode, and when the polarity-reversal mode is the second mode, and it is detected that the lamp voltage... |
| Systems and methods for backlighting image displays | 20080315785 | 20081225 |
| Systems and methods for backlighting an image display by independently driving multiple backlights for the display. The display may be, for example, a LCD display panel of a portable information handling system such as a battery-powered notebook computer that employs two or more cold cathode fluorescent lamps (CCFLs) for backlighting the LCD display. The multiple backlights may be independently driven, for example, using a common inverter that is capable of independently driving two or more backlight lamps, or by driving each backlight lamp with a separate inverter.
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| Method and circuit for correcting a difference in light output at opposite ends of a fluorescent lamp array | 20080315792 | 20081225 |
| A method and electrical circuit corrects a difference in light output at opposite ends of a fluorescent lamp array. An electrical circuit for correcting a difference in light output at the ends of a fluorescent lamp array includes a microcontroller and firmware for generating a first pulse-width modulated inverter switch control signal having a first duty cycle that may be varied by computer program instructions executed by the microcontroller. An inverter bridge driver is coupled to the microcontroller for generating a switching signal for a first inverter bridge from the first pulse-width modulated inverter switch control signal to generate a first inverter voltage having a magnitude determined by the first duty cycle.
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| Method and firmware for controlling voltage and current in a fluorescent lamp array | 20080315793 | 20081225 |
| A method and firmware for controlling voltage and current in an electrical load includes steps of calculating a numerically quantized duty cycle of a pulse-width modulated, digital switch control signal by firmware in an inverter voltage microcontroller as a function of an inverter voltage and controlling the inverter voltage by adjusting the duty cycle of the digital switch control signal to generate a load current in the electrical load.
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| Method and firmware for generting a digital dimming waveform for an inverter | 20080315794 | 20081225 |
| A method and firmware for method of generating a digital dimming waveform for an inverter includes steps of receiving programmable parameters as input to firmware in an inverter voltage microcontroller including a soft start duration, a restrike voltage, a restrike duration, a recovery duration, a sustaining voltage, a dimming duty cycle, and an inverter frequency; and generating by firmware in the inverter voltage microcontroller a first portion of a pulse-width modulated digital switch control signal having a frequency equal to the inverter frequency and a duty cycle that varies from a first value to a second value during a time interval equal to the soft start duration.
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| Method and firmware for controlling an inverter voltage by drive signal frequency | 20080315797 | 20081225 |
| A method and firmware for controlling an inverter voltage includes steps of receiving as input a digitized feedback signal representative of an inverter voltage that varies with frequency according to a transfer function, calculating a frequency of a digital switch control signal in firmware in an inverter voltage microcontroller by the transfer function from the digitized feedback signal to adjust the inverter voltage to a set point value, and generating the digital switch control signal having the calculated frequency by firmware in the inverter voltage microcontroller as output to generate the inverter voltage at the set point value.
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| Elevator control device | 20080315802 | 20081225 |
| An elevator control device that drives a cage in a high-efficient speed pattern without using a load detector such as a conventional scale device. The elevator control device includes: a current detector for detecting a current that is supplied to a motor from an inverter; a speed detector for detecting a rotation speed of the motor; a speed pattern generator for generating an elevator speed pattern a motor speed control device for controlling the speed so that a speed detection value follows a speed command value of the speed pattern; and a motor current control device for controlling a current that is supplied to the motor with respect to the inverter by using a current detection value and the speed detection value on the basis of... |
| Hybrid electric vehicle | 20080315803 | 20081225 |
| A hybrid electric vehicle includes, in one example, a motor-generator driven by an engine to generate alternating current, wherein the motor-generator is further configured to start the engine, a motor for driving the vehicle, a diode rectifier to rectify alternating current generated by the motor-generator, an inverter connected to a feed circuit between the diode rectifier and the motor to convert direct current in the feed circuit into alternating current, a power supply connected to a line connecting the diode rectifier with the inverter, a first feed circuit to supply current to the motor to drive the vehicle through the diode rectifier and the inverter in series a second feed circuit to connect the motor-generator with the power supply while bypassing at least the diode rectifier,... |
| Transmission line pulse testing with reflection control | 20080315891 | 20081225 |
| A Transmission Line Pulse (TLP) testing system is disclosed that has a negative pulse inverter circuit that prevents large negative reflections which typically occur after the initial TLP pulse is applied to a low impedance device under test (DUT). Avoiding repetitive reflections, which naturally occur in TLP systems, prevents inducing DUT damage and confusing testing results. The pulse inverter circuit reduces reflections to lower levels than prior art TLP configurations, and can also be combined with known techniques to further reduce reflections for different impedance DUTs.
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| Thin film transistor logic | 20080315918 | 20081225 |
| A thin-film logic circuit, which can be fabricated entirely of TFTs of the same conductivity type, includes a logic stage connected to a supply voltage and a level shifter connected to a wider voltage range provided by the supply voltage and ground. The logic circuit produces output signals with full rail-to-rail signal range from ground to the supply voltage and can implement or include a basic logic component such as an inverter, a NAND gate, or a NOR gate or more complicated circuits in which many basic logic components are cascaded together. Such logic circuits can be fabricated directly on flexible structures or large areas such as in flat panel displays.
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| Driving circuit for switching elements | 20080315938 | 20081225 |
| A level shifting circuit, satisfying a requirement of a high tolerated dV/dt level, and a highly reliable inverter circuit, wherein a set pulse signal and a reset pulse signal, both of which are level-shifted to a potential side taking as reference a reference potential of a gate control terminal of a switching terminal, are obtained differentially and integrated, and, in case these pulse signals equal or exceed stipulated integrated values, are transmitted as regular control signals controlling the on/off state.
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| Oscillator | 20080315966 | 20081225 |
| An oscillation circuit induces a first inverter, a second inverter, a first inductive load, a second inductive load and a capacitive load. A first inverter and a second inverter receive a first signal and a second signal, and invert the first and the second signal to output a first inverted signal and a second inverted signal respectively. An output end of the first inverter is electrically connected to a first inductive load, and an output end of the second inverter is electrically connected to a second inductive load. Further, a capacitive load is electrically connected to the output end of the first inverter and the output end of the second inverter, so as to receive the first and the second inverted signal respectively. The capacitance of... |
| Liquid crystal display having inverter for controlling back light for liquid crystal display panel having a variety of shapes to obtain uniform luminance | 20080316165 | 20081225 |
| There is provided a liquid crystal display. The liquid crystal display includes a TFT-LCD panel having any one of a variety of shapes including a circular shape, an elliptical shape, a circular arc shape, and a shape with an angle other than 90°; a plurality of straight light sources disposed at a rear side of the TFT-LCD panel and having a different length according to the shape of the TFT-LCD panel; and an inverter and a transformer connected to one terminal of each light source, wherein the inverter induces a same current to the light sources having a different length and the transformer supplies a boosted voltage lo dependent on the length of each light source to the light source so that luminance is uniform. With... |
| Liquid crystal display comprising driving circuit unit | 20080316188 | 20081225 |
| There is provided a liquid crystal display comprising a driving circuit unit. The driving circuit unit has an adaptor and an inverter for converting an input voltage integrally configured with each other. Thus, the liquid crystal display is made small. The liquid crystal display can stably and efficiently display an image through a smaller liquid crystal when an external voltage is supplied to each circuit.
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| System and method for producting anharmonic multi-phase currents | 20080316782 | 20081225 |
| A system and method for producing anharmonic multi-phase currents wherein the harmonic component of an inverter is filtered and superimposed with a series of control pulses to create a control signal. The control signal is fed back to the inverter, causing the inverter to produce anharmonic multi-phase currents.
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| Photovoltaic power converter system with a controller configured to actively compensate load harmonics | 20080308141 | 20081218 |
| Photovoltaic power converter system including a controller configured to reduce load harmonics is provided. The system comprises a photovoltaic array and an inverter electrically coupled to the array to generate an output current for energizing a load connected to the inverter and to a mains grid supply voltage. The system further comprises a controller including a first circuit coupled to receive a load current to measure a harmonic current in the load current. The controller includes a second circuit to generate a fundamental reference drawn by the load. The controller further includes a third circuit for combining the measured harmonic current and the fundamental reference to generate a command output signal for generating the output current for energizing the load connected to the inverter. The photovoltaic... |
| Fuel cell vehicle | 20080308329 | 20081218 |
| A fuel cell vehicle capable of improving energy efficiency by reducing switching loss is provided. The fuel cell vehicle includes: a fuel cell that generates direct current power; inverters which respectively include switching elements and convert the direct current power generated by the fuel cell into alternating current power; a diode that prevents current from flowing from the inverters toward the fuel cell; a step up/down DC/DC converter that adjusts the voltage of the cathode side of the diode; a voltage control part that controls the step up/down DC/DC converter, thereby controlling current output from the fuel cell; and a stop and idle determination part that stops the supply of air to the fuel cell, thereby stopping idling of the fuel cell. The voltage control part... |
| Semiconductor device | 20080308848 | 20081218 |
| A semiconductor device according to an aspect of the invention comprises an n-type FinFET which is provided on a semiconductor substrate and which includes a first fin, a first gate electrode crossing a channel region of the first fin via a gate insulating film in three dimensions, and contact regions provided at both end of the first fin, a p-type FinFET which is provided on the semiconductor substrate and which includes a second fin, a second gate electrode crossing a channel region of the second fin via a gate insulating film in three dimensions, and contact regions provided at both end of the second fin, wherein the n- and the p-type FinFET constitute an inverter circuit, and the fin width of the contact region of the... |
| Circuit and method for reducing a voltage being developed across a field winding of a synchronous machine | 20080309084 | 20081218 |
| In an electrical power system of a diesel powered system having at least one diesel-fueled power generation unit, the electrical power system having a synchronous machine including a field winding being coupled to the diesel-fueled power generation unit, a battery for selectively providing a starting current during a starting mode of the electrical power system, and an inverter receiving the starting current for driving the synchronous machine and generating an inverter current, a circuit and method for reducing a voltage being developed across the field winding is described. The circuit includes a current conditioner for conditioning the inverter current and a parallel circuit interposed between the inverter and the current conditioner comprising a first branch including a resistance and a second branch including the field winding... |
| Backlight control circuit having frequency setting circuit and method for controlling lighting of a lamp | 20080309247 | 20081218 |
| An exemplary backlight control circuit includes an inverter, a pulse width modulation (PWM) circuit, and a frequency setting circuit. The inverter is configured to provide an alternating current voltage to a lamp. The PWM circuit is configured to provide a pulse control signal to the inverter. The frequency setting circuit is configured to regulate a frequency of the pulse control signal provided by the PWM circuit according to a temperature of the lamp.
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| Backlight control circuit having frequency setting circuit and method for controlling lighting of a lamp | 20080309248 | 20081218 |
| An exemplary backlight control circuit includes an inverter, a pulse width modulation (PWM) circuit, and a frequency setting circuit. The inverter is configured to provide an alternating current voltage to a lamp. The PWM circuit is configured to provide a pulse control signal to the inverter. The frequency setting circuit configured to regulate a frequency of the pulse control signal provided by the PWM circuit according to an environment temperature.
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| Multiple phase electric motor and drive | 20080309262 | 20081218 |
| A multiple phase electric motor provided with multiple inverter power circuits is described herein. The capacity of the capacitor bank required for multiple phase motors operating from a DC power source is therefore decreased. This is done by forming groups of phases that are powered by a separate inverter power circuit. The inverter power circuits are connected to the same DC power source including a bank of capacitors and are so controlled as to be phase offset from one another to allow the use of a smaller capacity capacitor bank.
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| Portable electric power station | 20080309290 | 20081218 |
| A portable, electrical power station has an insulated, wheeled housing containing a self-contained, self-sustaining electrical power generating system. The system employs a key operated ignition switch which activates an inverter. The inverter converts direct current received from a battery to alternating current and sends that current to a motor which then powers an alternator. The alternator generates electric current to the inverter. Electricity is contemporaneously sent from the inverter to electrical outlets located on an outer wall of the housing. An unlimited variety of electrical devices and appliances can then be powered by simply plugging into the outlets.
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| Voltage controlled oscillator and phase locked loop circuit incorporating the same | 20080309414 | 20081218 |
| A voltage controlled oscillator includes a ring oscillator configured by connecting invertors, each of the invertors including a first and a second transistors, an operational amplifier to obtain an amplified signal, third transistors inserted between the first transistors and a first power supply, and is gate-controlled by the amplified signal, fourth transistors inserted between the second transistors and a second power supply, and is gate-controlled by the control signal, a inverter including a fifth and a sixth transistor, gate terminals and drain terminals of the fifth and sixth transistor being connected in common to a first input terminal of the operational amplifier, a seventh transistor inserted between the fifth transistor and the first power supply, and gate-controlled by the amplified signal, and an eighth transistor inserted... |
| Method and apparatus for receiving a universal input voltage in a welding power source | 20070295703 | 20071227 |
| A method and apparatus for providing a welding current is disclosed. The power source is capable of receiving any input voltage over a wide range of input voltages and includes an input rectifier that rectifies the ac input into a dc signal. A dc voltage stage converts the dc signal to a desired dc voltage and an inverter inverts the dc signal into a second ac signal. An output transformer receives the second ac signal and provides a third ac signal that has a current magnitude suitable for welding. The welding current may be rectified and smoothed by an output inductor and an output rectifier. A controller provides control signals to the inverter and an auxiliary power controller that can receive a range of input voltages... |
| Retrofittable power distribution system for a household | 20070296221 | 20071227 |
| An alternator is also operatively connected to the energy converting means. The alternator is configured to convert the motion produced by the energy converting means into another electric current. The alternator transmits this electric current to a bank of batteries which stores the charge. An inverter is electrically connected to the bank of batteries and transmits an electric current from the bank of batteries to a low-load circuit.
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| Retrofittable power distribution system for a household | 20070296222 | 20071227 |
| An alternator is also operatively connected to the energy converting means. The alternator is configured to convert the motion produced by the energy converting means into another electric current. The alternator transmits this electric current to a bank of batteries which stores the charge. An inverter is electrically connected to the bank of batteries and transmits an electric current from the bank of batteries to a low-load circuit.
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| Emi reduced power inverter | 20070296271 | 20071227 |
| A power inverter of the type used with hybrid electric vehicles having a circuit board with a power layer having a first and second section which are electrically separated using slits from each other on the power layer. A control circuit is connected to and powered by the first section of the power layer while a switching power supply is connected to and powered by the second section of the power layer. An electromagnetic filter is electrically connected between the sections of the power layer. This electromagnetic filter blocks high frequency noises of the type generated by the switching power supply while enabling the sections to be maintained at the same DC voltage level. Optionally, a ferrite covering is provided around a current bus bar of... |
| Retrofittable power distribution system for a household | 20070296276 | 20071227 |
| An AC-DC Charger and or alternator is also operatively connected to the energy converting means. The alternator is configured to convert the motion produced by the energy converting means into another electric current. The AC-DC Charger and or alternator transmits this electric current to a bank of batteries which stores the charge. An inverter is electrically connected to the bank of batteries and transmits an electric current from the bank of batteries to a low-load circuit.
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| Discharge lamp ballast device and lighting appliance | 20070296355 | 20071227 |
| An inverter controller dives an inverter to operate at a switching frequency selectively from one of a preheating frequency (f1), a starting frequency (f2), and a lighting frequency (f3) which are different from each other, thereby giving a preheating mode, a starting mode, and a lighting mode. A reset means is provided to make the starting mode upon lowering of a voltage supplied to the inverter below a first threshold, while an inverter stop means is provided to stop the inverter upon detection of abnormality of a discharge lamp. A timer generates a signal determining the start of the preheating, starting, and/or lighting modes, and generates a reset signal disable signal for disabling the reset means, an inverter stop disable signal for disabling the inverter stop... |
| Method for controlling voltage of dc link for electric vehicle | 20070296357 | 20071227 |
| Disclosed is a method for controlling a voltage of a DC link for an electric vehicle, which can reduce a capacitance of the DC link interposed between an inverter and a DC/DC converter. The method for controlling the voltage of the DC link in a power system of a vehicle including a battery, a DC/DC converter, the DC link, an inverter, a motor, and a control part controlling the DC/DC converter and the inverter includes the steps of installing a compensator in a control loop of the control part such that a DC link current of the DC/DC converter follows a DC link current of the inverter, calculating a predetermined compensation term based on information of the motor inputted into the compensator, and applying the compensation... |
| Hybrid vehicle | 20070296359 | 20071227 |
| A hybrid vehicle includes: first and second rotary electric machines; a matrix converter connecting the first and second rotary electric machines to each other to provide AC to AC power conversion between both the rotary electric machines; a battery connected to an electrical path branched off between the matrix converter and the second rotary electric motor; an inverter interposed among the battery, the matrix converter and the second rotary electric machine to convert AC power to DC power and vice versa; and a controller. The controller activates the first rotary electric machine with power fed from the battery and restrains the change in torque output of the second rotary electric machine at the activation of the first rotary electric machine.
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| Position sensorless control apparatus for synchronous motor | 20070296371 | 20071227 |
| The position sensorless control apparatus is for controlling a synchronous motor having a permanent magnet rotor structure by generating fundamental voltage vectors used to designate on/off states of switching devices included in an inverter circuit thereof. The position sensorless control apparatus includes a current change rate detecting section detecting, as a current change rate, a change rate of a phase current flowing through the synchronous motor when a predetermined one of the fundamental voltage vectors is being generated, and a rotor magnetic pole position estimating section estimating, as a rotor magnetic pole position, a rotational position of a rotor of the synchronous motor on the basis of the current change rate detected by the current change rate detecting section.
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| Domino logic testing systems and methods | 20070296465 | 20071227 |
| A domino logic test circuit includes a dynamic node, a precharge device for charging the dynamic node, and an output inverter for inverting an output of the dynamic node. A logic network is coupled to the dynamic node for discharging the dynamic node in accordance with logic. A footer device enables and disables the logic network. A keeper device is coupled to the dynamic node for retaining a charge state of the dynamic node while awaiting the logic network to operate in accordance with the logic. A test mode selection device is coupled to the dynamic node and is configured to enable a latch in the test mode. A phase selection device is configured to receive at least a wait signal and to enable selection of... |
| Oscillation stabilization circuit | 20070296514 | 20071227 |
| An oscillation stabilization detecting circuit comprises a T flip flop receiving a pulse-type oscillation signal generated by oscillating a crystal oscillator and then dividing the oscillation signal to output; a pulse control unit including inverters and transistors, the pulse control unit converting the signal output from the T flip flop into a pulse-type signal starting from a high level and then outputting the converted signal; and an oscillation stabilization detecting unit including a capacitor charged with the signal output from the pulse control unit; and a plurality of transistors. The oscillation stabilization detecting unit controls charging time of the capacitor by adjusting a bias current and, after the charging time passes, outputs a stabilization signal to a CPU, the stabilization signal representing that the oscillation signal... |
| Inverter transformer and discharge tube drive circuit using the same | 20070296535 | 20071227 |
| An inverter transformer to which coils for a balance transformer are integrally assembled. The inverter transformer is employed in a drive circuit for evenly driving a plurality of discharge tubes, and includes a primary coil and a secondary coil. The present invention proposes the inverter transformer which performs reduction in the number of components and in the size thereof by providing a through-hole a portion of a magnetic core section made from magnetic material configuring the inverter transformer, and by providing coils for a balance transformer through the through-hole.
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| Liquid crystal display device and driving method thereof | 20070296673 | 20071227 |
| A liquid crystal display (“LCD”) device includes a liquid crystal panel for displaying images, a backlight unit for supplying light to the liquid crystal panel, an operation unit for generating an operation value by performing operations on pixel data supplied to the liquid crystal panel during at least one frame, a comparator which compares the operation value with a reference value and which generates a dimming signal having a high voltage level when the operation value is greater than the reference value, and which generates a dimming signal having a low level when the operation value is less than the reference value, and an inverter which drives the backlight unit according to the dimming signal.
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| Liquid crystal display | 20070296903 | 20071227 |
| A liquid crystal display device includes a liquid crystal display panel, a plurality of lamps for irradiating light onto the liquid crystal display panel, a cover bottom that houses the plurality of lamps, an inverter printed circuit board having a first surface and a second surface opposite to the first surface with an insulation base layer between the first and second surfaces, wherein the second surface is adjacent to the cover bottom, a transformer on the first surface of the inverter printed circuit board, and a metal shielding pattern on the second surface of the inverter printed circuit board directly between the transformer and the cover bottom.
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| Apparatus for accomodating a plurality of individual inverters | 20070297206 | 20071227 |
| The invention is directed to an apparatus (1) for accommodating a plurality of individual inverters (2), comprising a rack, the individual inverters (2) being removably mountable to the side elements of said rack, said rack having at least one terminal block (10) for receiving cables for current supply and evacuation.
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| Low-power sram memory cell | 20070297249 | 20071227 |
| An SRAM memory cell that has a relatively small power consumption when writing a write value of ‘0’ to the memory cell includes cross-coupled first and second inverters, at least one read access transistor for selectively coupling a respective read bit line to a common connection node of a respective one of the first and second inverters, a switching transistor for selectively coupling the second inverter to a ground terminal, and a write access transistor for selectively coupling the common connection node of the second inverter to a write bit line.
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| Gas laser oscillator and gas laser beam machine | 20070297478 | 20071227 |
| A pressure of a laser gas in an enclosure (7) is detected by a gas pressure sensor (12), and a pressure comparison circuit (13) determines whether the thus-detected pressure is normal or anomalous. An electric current output from an inverter (10) that drives a blower (5) to cause a laser gas to flow back, is detected by a current detection circuit (9). A current comparison circuit (11) determines whether or not the output current is normal or anomalous. A result of a pressure comparison circuit (13) and a result of the current comparison circuit (11) are sent to an AND circuit (15) and performed AND processing. A result of the AND circuit (15), a result of the current detection circuit (9), and a result of the... |
| Method and apparatus for selecting and providing a set of instrumentation signals for locomotive testing and diagnostic purposes | 20070299569 | 20071227 |
| A technique for downloading data from a processor unit, such as an inverter control computer associated with a locomotive control system. When the software for the inverter control computer is originally built, a programmer assigns an ID number to all of the possible instrumentation signals that can be downloaded from the inverter control computer. From the complete list of the instrumentation signals, the programmer defines a default set of the instrumentation signals that are downloaded. If a user wishes to change the instrumentation signals that can be downloaded, then the user provides a command signal to the inverter control computer that changes the set of ID numbers of the instrumentation signals to be downloaded.
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| Dc to ac auxiliary power unit | 20070289325 | 20071220 |
| An Auxiliary Power Unit (APU) includes a Direct Current (DC) alternator run off an auxiliary engine, and a power inverter to convert the DC power to AC power. The APU also runs an Air Conditioning compressor to provide cooling and heat from engine coolant in the auxiliary engine is used to provide heating. The APU is particularly useful for providing cooling, heating, and AC power for long haul trucks, and motor homes. An alternative embodiment for local trucks does not include the inverter.
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| Alternating voltage generation apparatus and power output apparatus | 20070289794 | 20071220 |
| A power output apparatus includes first and second motor generators, first and second inverters and a relay circuit. The first and second motor generators include first and second 3-phase coils, respectively. The first inverter alters periodically the potential at a first neutral point of the 3-phase coil. The second inverter alters periodically the potential of the second neutral point of the second 3-phase coil at phase corresponding to a phase-inverted version of the potential change of the first neutral point. The relay circuit responds to a control signal from the control device to electrically connect first and second AC lines to a connector, and provides an alternating voltage generated across the first and second neutral points to the connector.
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| Brushless motor with double rotors | 20070290563 | 20071220 |
| It is a type of brushless motor with double rotors which is composed of one inside motor with radial-vertical permanent magnetic circuit and one outside motor with magnetic excitation circuit. The inside motor is made up of the input shaft, the inner rotor core, the permanent magnetic steel of the inner rotor, the external rotor core and the inner winding of the external rotor. The outside motor is made up of the stator winding, the stator core, the external rotor core and the external winding of the external rotor. From the inside toward outside, the specific structural arrangement is as follows: the input shaft, the inner rotor, the inner rotor core, the permanent magnetic steel of inner rotor core, the external rotor core, the inner winding... |
| Controller for motor and control method for motor | 20070290633 | 20071220 |
| A controller for a motor and a control method for a motor change an operating condition of each motor, considering difference in operating conditions, such as loss and temperature, thus making it possible to reduce a total loss in a plurality of motors. The controller includes a first motor operating condition calculator and a second motor operating condition calculator which calculate the estimated values of losses incurred when a first motor and a second motor are driven, and a DC voltage control unit which carries out, on a motor having a largest estimated value of loss, the processing for changing a supply voltage to change the voltage of DC power supplied to inverters by a DC/DC converter, thereby reducing the difference between a phase voltage, which... |
| Motor controller | 20070290647 | 20071220 |
| A motor controller is provided which can be reduced in the number of the wirings and power semiconductor devices required while maintaining the function equivalent to or higher than that of the motor controller adopting the existing winding changeover scheme, thereby realizing cost and size reduction and life increase. The motor is made in a structure having motor windings opened at both ends. The one end terminals of phase windings are respectively connected to the output terminals of a first inverter circuit while the other end terminals are respectively connected to the output terminals of a second inverter circuit. During power generation, any one of the inverter circuits is driven on all the phases by means of a same control pulse.
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| Motor control unit and vehicle equipped therewith | 20070290650 | 20071220 |
| A motor unit and a vehicle equipped with the unit according to the invention includes a control unit that selects a switching frequency, that is, a carrier frequency, in accordance with a rotation speed of the motor and a torque required from a motor. When an inverter temperature becomes high, the control unit limits the torque of the motor to suppress further increase in the inverter temperature. A limit value used in restricted operation is determined in accordance with the temperature and the carrier frequency of the inverter.
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| Power supply | 20070290666 | 20071220 |
| A power supply apparatus includes a switching regulator, a linear regulator, a timer circuit, a control circuit, an inverter, and a switch. The power supply apparatus is a step-down type DC-DC converter which steps down an input voltage inputted to an input terminal and then outputs an output voltage, which has been stepped down, to an output terminal. The timer circuit counts the time elapsed from when a start of the power supply apparatus is instructed by a control signal, and sets an output signal to a high level at a lapse of a predetermined time. When the output signal goes to the high level, the switch turns on and the output voltage is supplied to a power supply terminal of the control circuit.
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| N-domino register with accelerated non-discharge path | 20070290719 | 20071220 |
| An N-domino register has a domino stage, a write stage, an inverter, a high keeper path, a low keeper path, and an output stage. The domino stage evaluates a logic function based on at least one input data signal and a pulsed clock signal. The pulsed clock signal lags a symmetric clock signal. The domino stage pre-charges a pre-charged node high when the symmetric clock signal is low and opens an evaluation window when the pulsed clock signal goes high, and pulls the pre-charged node low if it evaluates, and keeps the pre-charged node high if it fails to evaluate. The output stage provides an output signal based on states of the pre-charged node and a second preliminary output node.
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| P-domino register with accelerated non-charge path | 20070290720 | 20071220 |
| A P-domino register has a domino stage, a write stage, an inverter, a high keeper path, a low keeper path, and an output stage. The domino stage evaluates a logic function based on at least one input data signal and a pulsed clock signal. The pulsed clock signal lags a symmetric clock signal. The domino stage pre-discharges a pre-discharged node low when the symmetric clock signal is high and opens an evaluation window when the pulsed clock signal goes low, and pulls the pre-discharged node high if it evaluates, and keeps the pre-discharged node low if it fails to evaluate. The output stage provides an output signal based on states of the pre-discharged node and a second preliminary output node.
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| Method and apparatus for amplifying a regulated differential signal to a higher voltage | 20070290721 | 20071220 |
| A sense amplifier for use in a memory device and in a memory-resident system. The sense amplifier operates on a lower voltage consistent with the voltage range of the differential input data and the sense amplifier further operates on a higher voltage to level-shift the output signal concurrently with the sensing operation. The sense amplifier includes a pair of differential cross-coupled inverters whose inputs are coupled to receive the data from the memory. Once the input nodes of the cross-coupled inverters are charged, the cross-coupled inverters are further coupled to pull-up and pull-down circuits that span the higher voltage range for performing the level-shifting functionality. In order to recondition the sense amplifier for a subsequent sensing process, a clamp circuit shorts the level-shifted outputs together to... |
| Liquid crystal display backlight inverter | 20070290722 | 20071220 |
| A liquid crystal display backlight inverter including a first error amplifying unit receiving and comparing a first detection voltage corresponding to a current flowing through a lamp with a first preset reference voltage and outputting a first error voltage corresponding to an error therebetween; a second error amplifying unit receiving and comparing a second detection voltage corresponding to a voltage applied to the lamp with a second preset reference voltage and outputting a second error voltage corresponding to an error therebetween; a feedback selector selecting one of the outputs of the first and second error amplifying unit according to an error between the second detection voltage and a third preset reference voltage; and a lamp control pulse generator generating a pulse signal having a duty controlled... |
| Liquid crystal display backlight inverter | 20070290723 | 20071220 |
| A LCD backlight inverter including: a dimming control unit comparing a level of a triangle wave with a level of a dimming control signal and controlling a dimming control current to be supplied or interrupted according to a comparison result; an error amplification unit having an input end to which a detection voltage corresponding to the dimming control current and a current flowing through a lamp are inputted, comparing the detection voltage with a predetermined reference voltage, and outputting an error voltage corresponding to a difference via an output end thereof, the output end working as a ground when the dimming control current is not inputted; and a time constant circuit unit comprising a resistor connected between the output end of the error amplification unit and... |
| Hybrid vehicle and control method of the same | 20060289210 | 20061228 |
| In the gate shutdown state of all switching elements included in an inverter for a motor MG1 (step S114) or in the gate shut downstate of all switching elements included in an inverter for a motor MG2 (step S122), the braking control of the invention uses disk brakes to output a supplementary braking force and compensate for an insufficiency of braking force. This arrangement effectively prevents an unintentional decrease of braking force applied to a hybrid vehicle even in the event of insufficiency in engine resistant braking force output from the motor MG1 to a driveshaft or in regenerative braking force output from the motor MG2 to the driveshaft.
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| Induction oven excitation arrangement for aircraft | 20060289488 | 20061228 |
| An aircraft induction oven excitation arrangement includes at least one connection for an on-board power supply system, at least one power supply rectifier that can be connected to a phase of the power supply system, a converter that is arranged downstream of the at least one power supply rectifier and that includes a switching element, a controller that drives the at least one converter, a rectifier that is arranged downstream of the converter in order to produce an intermediate circuit voltage, an inverter that is connected to the intermediate circuit voltage. The switching element has a turn-on resistance Rdson≦about 0.1Ω and a self-capacitance≦about 200 pF at voltages of ≧about 200 V across the switching element.
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| Induction cooktop with remote power electronics | 20060289489 | 20061228 |
| A range having an induction cooktop and a conventional oven is disclosed. The power electronics of the induction cooktop can be located remotely with respect to the induction elements such that detrimental effects caused by heat from the oven are mitigated and any service work required greatly simplified. A fan for the power electronics of the induction cooktop can be controlled in a manner that mitigates undesirable noise. Objectionable beat frequencies between two operating induction coils of the cooktop can be mitigated. A single inverter can be used to power multiple induction coils via the use of a switching relay. Thus, a more reliable, less costly, and more user friendly induction cooker can be provided.
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| Gradient induction heating of a workpiece | 20060289494 | 20061228 |
| An apparatus and process are provided for gradient induction heating or melting of a workpiece with a plurality of induction coils, each of the plurality of induction coils is connected to a power supply that may have a tuning capacitor connected across the input of an inverter. The plurality of induction coils are sequentially disposed around the workpiece. The inverter has a pulse width modulated ac power output that may be in synchronous control with the pulse width modulated ac power outputs of the other power supplies via a control line between the controllers of all power supplies.
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| Inverter power source control circuit for high-frequency heater | 20060289509 | 20061228 |
| An oscillation control signal generated by an inverter power source control circuit (12) includes a reference voltage setting signal for approximating the current waveform of the AC output form the AC power source (1) to a sinusoidal wave by making both sides of the waveform generate current according to the fluctuation of the PWM control signal, and a waveform shaping signal consisting of a peak adjustment signal of a sinusoidal waveform for approximating the waveform peak portion of the current waveform to a sinusoidal wave by subtraction. Accordingly, even if the PWM control signal fluctuates, it is possible to automatically improve the power factor of the power source circuit to a value higher than a predetermined value by approximating the current waveform of the AC output... |
| High- frequency heater inverter power source control circuit | 20060289511 | 20061228 |
| At least one of a start abnormality detector (31), a temperature abnormality detector (32) and a voltage abnormality detector (33) has a latch inhibiting circuit for inhibiting retention of a detecting state when one of the abnormality detectors detects an abnormality, so that a current abnormality detector (34) can be inhibited from detecting an abnormal input current caused when the oscillation is halted by the abnormality detector. Accordingly, after the abnormality is removed, automatic resetting can be easily accomplished without causing the oscillation to halt as a result of the current abnormality detector detecting the presence of the abnormality. Also, since a power source abnormality detecting circuit (30) is designed in the form of an analog circuit, a low cost can be achieved and the monitoring... |
| Electric power supply apparatus and induction heating apparatus | 20060290295 | 20061228 |
| A converter (311) converts an AC electric power (e) to the DC electric power with a DC voltage value corresponding to a setting. An inverter (312) is controlled by a frequency electric power control circuit (330) to convert the DC electric power to a dual frequency AC electric power for alternately outputting low and high frequencies at a frequency ratio (duty) corresponding to the setting. A matching transformer (321) having a tap (321C) at which the resonance impedance corresponds to the output impedance of a generator (310) receives the dual frequency AC electric power. A low-frequency series resonance circuit (325) or a high-frequency series resonance circuit (326) is caused to provide a series resonance, thereby causing an induction heating coil (200) to induction heat a workpiece-to-be-heated... |
| Apparatus for driving lamp of liquid crystal display device | 20060290296 | 20061228 |
| The present invention relates to a lamp driving apparatus of a liquid crystal display capable of simplifying a structure of the liquid crystal display and in addition preventing a leakage current of the lamp driving apparatus. The lamp driving apparatus of the liquid crystal display comprises: a plurality of lamps; and an inverter block having a plurality of inverters that supply a drive current to the lamps wherein adjacent lamps have a different phase from one another.
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| Maximum power point motor control | 20060290317 | 20061228 |
| A method and apparatus are implemented in software to control motor speed as a function of available power in a DC source—inverter—AC motor system, i.e. to perform maximum power tracking of motor speed. An inverter or motor drive converts DC power from a DC source, such as a solar panel, to AC power, to power the motor. The inverter or motor drive is controlled by software, implemented either by programmable features built directly into the inverter or drive or by a separate programmable device connected to the inverter or drive, to track motor power as a function of source power. The software-controlled inverter or drive sets motor speed as a function of source power by sensing only a single parameter, the DC source voltage. The software-controlled... |
| Electric motor car control apparatus | 20060290318 | 20061228 |
| An electric motor control apparatus including an inverter which drives a motor of an electric motor car, storage unit for storing energy for the motor, and a converter which is connected to the storage unit, the inverter comprising detection unit for detecting a power value of the motor, and transmission unit for transmitting the power value detected by the detection unit to the converter, and the converter comprising calculation unit for receiving the power value transmitted by the transmission unit, and calculating an absorption current on the basis of the received power value, and control unit for controlling the storage unit on the basis of the absorption current calculated by the calculation unit.
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| Heating of batteries using reactive power | 20060290325 | 20061228 |
| A circuit and method are provided for allowing self-heating of a battery used to power an AC motor by way of connection to a DC to AC inverter circuit. The inverter is selectively controlled to generate a heating mode AC current at the DC side connection to the battery, wherein the heating mode AC current is formed substantially of only a reactive AC current component and substantially no DC current component. In accordance with another aspect, the heating mode AC current is generated to fill the idle time in the operation of the battery.
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| Dual gate dynamic logic | 20060290383 | 20061228 |
| A dynamic logic gate has a device for charging a dynamic node during a pre-charge phase of a clock. A logic tree evaluates the dynamic node with a device during an evaluate phase of the clock. The dynamic node has a keeper circuit comprising an inverter with its input coupled to the dynamic node and its output coupled to the back gate of a dual gate PFET device. The source of the dual gate PFET is coupled to the power supply and its drain is coupled to the dynamic node forming a half latch. The front gate of the dual gate PFET is coupled to a logic circuit with a mode input and a logic input coupled back to a node sensing the state of the... |
| Apparatus and methods for voltage level conversion | 20060290404 | 20061228 |
| A cross-coupled, latching voltage level converter to convert a signal from a first voltage domain to a second voltage domain and hold an output logic level is disclosed. The converter includes back-to-back first and second inverter circuits coupled to a first voltage source operable at a first voltage level. A transistor is coupled between an output of the first inverter and ground potential, the first transistor having a gate coupled to an input signal operable at a second voltage level. A second transistor is coupled between the output of the second inverter and ground potential, the second transistor having a gate coupled to an inverse of the input signal operable at the second voltage, wherein a terminal of the second transistor delivers an output signal operable... |
| Temperature compensation circuit | 20060290408 | 20061228 |
| A temperature compensation circuit consists of a thermo sensitive resistance, a fixed resistance, a logic buffer, and a logic inverter, without incorporating any operational amplifier. A resistance value of the thermo sensitive resistance is changed by temperature change. The fixed resistance has a small temperature changes that is smaller than that of the thermo sensitive resistance. Both the fixed resistance and the thermo sensitive resistance are connected electrically to an output terminal of the temperature compensation circuit. The logic buffer sets the other terminal of the fixed resistance to a first voltage that is one of a voltage level of a power source and a ground level. The logic inverter sets the other terminal of the thermo sensitive resistance to a second voltage that is reversed... |
| Substrate bias voltage generating circuit for use in a semiconductor memory device | 20060290412 | 20061228 |
| A substrate voltage generating circuit for use in a semiconductor memory device is provided. The semiconductor memory device includes a charge pump for generating a substrate bias voltage in response to a clock signal; a first inverter type detector for detecting whether the substrate bias voltage reaches a target voltage; a second differential amplifier type detector for detecting whether the substrate bias voltage reaches the target voltage; and a driver for generating the clock signal in response to an output of one of the first and second detectors.
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| Direct current offset canceling circuit of trans-impedance amplifier and automatic gain control trans-impedance amplifier thereof | 20060290432 | 20061228 |
| A direct current (DC) offset canceling circuit of a trans-impedance amplifier and an automatic gain control trans-impedance amplifier is provided, including: a trans-impedance amplifier for receiving an input current and converting the input current into a first voltage signal, while the trans-impedance amplifier is provided with a plurality of inverters connected in series, wherein a sample node is defined between each inverter; a DC detector for retrieving and comparing the signals at any sample node, thereby generating a trigger signal according to the comparison; a DC eliminator for providing a path to the DC component of the input current in response to the triggering by the signal trigger, to eliminate the DC component; a reference voltage unit for outputting a reference voltage value; and a voltage... |
| Comparator-based drivers for lcd displays and the like | 20060290635 | 20061228 |
| A comparator-based driver has a configurable inverter that inverts one of the comparator output signals for application to the gate of a driver transistor used to generate the driver output signal. The configurable inverter can be selectively configured to provide any one of at least two different inverter logic threshold levels. In one possible operational scenario, the configurable inverter is configured such that the inverter logic threshold level is equivalent to the comparator's differential common-mode voltage to provide relatively high driver symmetry. The configurable inverter is then configured to provide a different inverter logic threshold level that is greater than the comparator's differential common-mode voltage to inhibit chattering in the driver output signal.
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| Backlight control unit and liquid crystal display device having the same | 20060290648 | 20061228 |
| A backlight control unit for a liquid crystal display device includes a liquid crystal panel for displaying an image, a backlight for providing light to the liquid crystal panel, a gate driving unit and a data driving unit for driving the liquid crystal panel, a timing controller for outputting signals to control the gate driving unit and the data driving unit, and for outputting a dimming control signal to control a light output amount of the backlight according to representative gradation values obtained by analyzing red, green, and blue gradations included in inputted image data, and an inverter for controlling the backlight to control a light output amount from the backlight according to the dimming control signal outputted from the timing controller.
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| Cooling structure of electric device | 20060291261 | 20061228 |
| A cooling structure of electric devices in a vehicle is structured to hold an inverter (300) downward of a cooling passage (356), and to hold a condenser (200) upward of the cooling passage (356). The heating value generated by the inverter (300) is larger than the heating value generated by the condenser (200).
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| Sram memory cell and associated read and write method | 20060291273 | 20061228 |
| A memory cell comprises a first inverter (IA) and a second inverter (IB) coupled upside down to each other between a first node (A) and a second node (B), and a first access transistor (TA) having a drain coupled to the first node (A), a gate coupled to a word line (WL) and a source coupled to a bit line (BLREAD). The memory cell also comprises a reference transistor (TC) having a drain coupled to the first node (A) and a source coupled to a reference line (BLREF), a cut-off potential (GND) being applied to a gate of the reference transistor (TC). Also disclosed is a memory comprising memory cells as described here above, a write method and an associated read method.
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| Storage units and register file using the same | 20060291320 | 20061228 |
| A storage unit capable of retaining data during sleep mode. The storage unit includes a first latch composed of first and second inverters and a second latch composed of the first inverter and a third inverter, in which the first and second inverters have different threshold voltages. The first inverter comprises an input terminal coupled to a write port and an output coupled to a read port. The second inverter comprises an input terminal coupled to the read port and an output terminal coupled to the write port. The third inverter comprises an input terminal coupled to the write port and an output terminal coupled to the read port.
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| Parallel redundant power system and the control method for the same | 20060293798 | 20061228 |
| A power redundant power system and a method for controlling the power system are presented, wherein the power system is composed of at least one inverter for supplying AC power to a load through a bus, a phase lock system to synchronize all output voltages of the inverters and a current sharing circuit to properly distribute the load current among all inverters. Each inverter is controlled by an unbalanced power to limit the increase of its cross current. Moreover, the information related to DC bus voltage is further applied to control the inverters, whereby the cross current is mitigated and entire power system is operated steadily.
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| Winch having integrated inverter for providing ac power | 20060284153 | 20061221 |
| A winch mechanism is provided with an integrated inverter for providing AC electric power from a DC electric power source. The winch mechanism is also provided with a plug receptacle to allow standard AC electric devices to be plugged into the winch mechanism so that the appliance can be utilized remotely from other AC electric power sources.
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| Semiconductor integrated circuit and device and method for testing the circuit | 20060284293 | 20061221 |
| An accelerated test for transistors included in inverter circuits of a semiconductor integrated circuit is to be improved in efficiency. Output terminals 30A, 30B of inverter circuits 11, 12, each including a CMOS circuit, may be short-circuited. A test circuit 20 supplies signals of mutually exclusive logical values to the inverter circuits 11, 12, whose output terminals 30A, 30B are in a short-circuited state. For testing, a switch 50 is turned on to short-circuit the output terminal 30A, 30B and signals of opposite logical levels are alternately supplied to the inverter circuits 11, 12 to cause the current to flow alternately through N-channel MOS transistors and P-channel MOS transistors included in the two CMOS circuits to activate the circuits.
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| Power supply system for flat panel display devices | 20060284568 | 20061221 |
| A power supply system for powering backlight lamps in a flat panel display with reduced dimensions and increased power efficiency. The power supply system includes a converter circuit for converting an alternating current (AC) signal from an AC power source to a high direct current (DC) signal, and a high voltage (HV) inverter system that includes a power stage circuit, a transformer circuit, and a current balance circuit. The HV inverter system is coupled to the converter circuit and specifically configured to convert the high DC signal into an AC output signal to power the backlight lamps.
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| Driving apparatus for ccfl | 20060284570 | 20061221 |
| The invention relates to a driving apparatus for a CCFL capable of easily providing a high output required to start the lamp. In the apparatus, an oscillator provides a reference signal in accordance with a lamp-on condition or a lamp-out condition. According to the invention, a tuning capacitor current of an oscillator is increased so that a switching speed of an inverter becomes faster in the lamp-out condition than in the lamp-on condition, thereby satisfying the voltage required to start the lamp.
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| Time control circuit for backlight inverter | 20060284577 | 20061221 |
| In a time control circuit, a capacitor is connected between a connecting pin and a ground. A first current source supplies a first current to the connecting pin. A first comparator element has a non-inverse terminal connected to a voltage of the capacitor and a pre-set first reference voltage, and controls the initial startup time. A second comparator element has an inverse terminal connected to the voltage of the capacitor and a pre-set second reference voltage, and controls the soft start time. Further, a current bypass controller includes a current bypass path between the connecting pin and the ground, which connects the current bypass path after the soft start time and blocks it at an input of a protective signal. Additionally, a third comparator element has... |
| Method and system for a circuit for timing sensitive applications | 20060284648 | 20061221 |
| Systems and methods for circuits with substantially equal propagation delay while providing different drive strengths are disclosed. These systems and methods may allow for a circuit with a drive strength that is some ratio of an arbitrary strength full drive strength circuit. Additionally, these circuits may have substantially the same input capacitance and feedback current as the baseline drive circuit. The input of such a circuit may be coupled to three nodes, one of which is an inverter coupled to the logic to be driven, the second of which is dummy logic, and the third of which is an inverter the output of which is left floating.
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| Rise and fall balancing circuit for tri-state inverters | 20060284658 | 20061221 |
| Disclosed are various embodiments for adjusting both the rise and fall or both of an output pulse in an inverter circuit so that the output pulse has a length that matches the length of the input pulse. Stages of transistors having various sizes can be activated in both a pull-up circuit, a pull-down circuit or both to adjust the rise time and/or fall time of the output pulse.
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| Cmos integrated circuit for correction of duty cycle of clock signal | 20060284659 | 20061221 |
| A CMOS integrated circuit (12) for correction of the duty cycle of a clock signal has a correction amplifier (16) to which a clock signal (14) is applied. The output of correction amplifier (16) is connected to an output buffer (18) and to an input of a duty cycle detector (20), the output of which is fed back to a control input (VC) of correction amplifier (16), thus forming a control loop. The duty cycle detector (20) comprises a buffer amplifier (22), an RC low pass circuit and a second inverter (24). A deviation of the duty cycle of the clock signal is detected in the duty cycle detector 20 and used to correct the duty cycle in the correction amplifier 16.
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