|| List of recent Inverter-related patents
| Current-fed full-bridge dc-dc converter|
A current-fed full-bridge dc-dc converter includes a current source circuit including a direct-current voltage source circuit and a reactor connected to the direct-current voltage source circuit in series, an inverter circuit including switching elements, input terminals and output terminals, wherein outputs of the current source circuit are connected to the input terminals, a transformer having a primary coil that is connected to the output terminals and a secondary coil and a rectifier circuit which is connected to the secondary coil and through which the current-fed full-bridge dc-dc converter generates direct-current output. The current-fed full-bridge dc-dc converter further includes a capacitor connected to the output terminal and the primary coil in series and a controller controlling on/off operations of the switching elements so that a current can flow from the current source circuit through the primary coil and the capacitor in stopping of the current-fed full-bridge dc-dc converter..
| Method and device to protect an esp power supply from transient over-voltages on the power grid|
A power supply converter unit is disclosed, in particular for an electrostatic precipitator, converting the frequency of alternating input supply (1) to high frequency alternating output (ua, ub) by rectifying the alternating input supply (1) in a rectifier (12) to a direct current (udc), which is converted to alternating-current in a full bridge inverter (13) in a h-bridge circuit with switches (48) controlled by a control unit (23). According to the invention on the input side of the rectifier (12) and/or in the direct current (udc) section there is provided at least one overvoltage protection circuitry (34, 35, 37-39, 45).
| Level shifter circuit and gate driver circuit including the same|
There are provided a level shifter circuit and a gate driver circuit including the same. The level shifter circuit includes: a plurality of switching devices connected to a predetermined dc power supply through a resistor and operated by different driving signals; a gain conversion unit operated by first signals output from the plurality of switching devices, respectively, and generating second signals having a level within a predetermined range of the first signals; and a noise removal unit connected to at least one output terminal among the plurality of switching devices to prevent malfunctioning of the gain conversion unit, wherein the gain conversion unit inputs the second signals to a high side gate driver circuit through an inverter circuit..
|Power conversion apparatus|
Technology leading to a size reduction in a power conversion apparatus comprising a cooling function and technology relating to enhancing productivity and enhancing reliability necessary for commercial production are provided. Series circuits comprising an upper arm and lower arm of an inverter circuit are built in a single semiconductor module 500.
|Photovoltaic system power optimization|
An example system may comprise at least one solar panel including a plurality of photovoltaic cells, wherein the photovoltaic cells are grouped into at least a first group of cells and a second group of cells. The first and second groups of cells may be coupled in series to a dc bus to deliver dc voltage and power to the dc bus.
|Power conversion apparatus|
A dc link is provided, which includes a capacitor connected in parallel to an output of a converter circuit, and outputs a pulsating dc link voltage. An inverter circuit is provided, which converts an output of the dc link to ac by switching, and supplies the ac to a motor connected thereto.
|Wireless electrical power transmission system and its control method|
The present invention provides a wireless electrical power transmission system and its control method with good thermal stability. Said system, comprising a transmitting coil frequency generating part and a coil frequency phase tracking and feedback part, the transmitting coil frequency generating part composed of a control circuit, a driving circuit and an inverter circuit, the coil frequency phase tracking and feedback part composed of a frequency detection circuit and a phase locked loop circuit, is characterized in that said control circuit is controlled by software to output two opposite control signals, each of which controls opening and closing of a switch tube after passing through the driving circuit to generate high-frequency oscillation in the coil..
|Inverter circuit having a junction gate field-effect transistor|
An example inverter circuit assembly includes at least one first transistor device and at least one second transistor device. The second transistor device comprises a silicon carbide junction gate field-effect transistor.
|Contactless power transfer system|
A half-bridge inverter is used for a high frequency alternating current power supply to be connected to a primary side of a contactless power transformer, and a voltage-doubler rectifier is used to convert a secondary-side alternating current output of the contactless power transformer into a direct current.. .
When a semiconductor device is provided with an inverter comprising a transistor having a first gate and a second gate, the semiconductor device does not require a circuit for generating a potential to be input to the second gate of the transistor and has a small number of wirings. Moreover, a semiconductor device having high reliability is provided.
|Cascaded h-bridge (chb) inverter level shift pwm with rotation|
Cascade h-bridge inverters and carrier-based level shift pulse width modulation techniques are presented for generating inverter stage switching control signals, in which carrier waveform levels are selectively shifted to control thd and to mitigate power distribution imbalances within multilevel inverter elements.. .
|Controller for an inverter circuit, inverter, and method for operating an inverter|
Damage to an inverter due to an excessively high start-up current, when using space vector control without a voltage sensor in conjunction with small connection inductances, can be prevented with a method for controlling the inverter, and with a corresponding controller, wherein the controller is configured to transmit in a start-up phase of an inverter circuit a control signal to a control input of the inverter circuit, wherein the control signal simultaneously switches three first semiconductor switches, which are connected to a first dc voltage terminal of the inverter circuit, temporarily into a conducting state.. .
|Inverter control device, electric compressor, and electric device|
An inverter control device of the present invention operates by synchronous commutation in which a commutation signal waveform is output with an electric angle of less than 180 degrees at a predetermined frequency according to a target rotation speed of a brushless dc motor. In order to maintain an induced voltage phase of a brushless dc motor at a predetermined phase with respect to an output voltage of an inverter circuit unit, even in an operation by the synchronous commutation, the output voltage of the inverter circuit unit is changed according to a change in state of the induced voltage phase of the brushless dc motor to continue a running state of the motor.
|Power inverter circuit|
A power inverter circuit 1 is a bridge power inverter circuit comprising first and second switching elements 11, 12 sequentially connected in series between input terminals on higher and lower voltage sides and third and fourth switching elements 13, 14 sequentially connected in series between the input terminals on the higher and lower voltage sides and alternately turning on a set of the first and fourth switching elements 11, 14 and a set of the second and third switching elements 12, 14 so as to convert a dc power fed between the input terminals on the higher and lower voltage sides into an ac power. One of the sets of the first and third switching elements 11, 13 and the second and fourth switching elements 12, 14 is subjected to switching control at a frequency higher than that of the other..
|Load filters for medium voltage variable speed drives in electrical submersible pump systems|
A medium voltage drive for driving a motor of an electric submersible pump can include inverter circuitry that includes an output for output of power and a load filter connected to the output that includes inductors and capacitors that include inductance (l) and capacitance (c) values that determine a resonance frequency (fr) value within a range from approximately 750 hz to approximately 1000 hz according to the equation fr=(2π(lc)0.5)−1. Various other apparatuses, systems, methods, etc., are also disclosed..
|Bus circuit and semiconductor device|
A bus circuit which transfers data of a plurality of bits output from one module to another module, includes: a data bus; a division circuit configured to divide the data into a plurality of pieces of divided data including a plurality of bits in a number equal to or less than half a bit width of the data bus; an inverter circuit configured to generate a plurality of pieces of inverted divided data by inverting each of the plurality of pieces of divided data; an output circuit configured to output each of the plurality of pieces of divided data and each of the pieces of inverted divided data corresponding to each of the pieces of divided data as a data pair; and a coupling circuit configured to extract and couple the plurality of pieces of divided data from the data pair received from the data bus.. .
|Power converter device for driving solid state lighting load|
A power converter device for converting power from a mains power supply (201) to power a solid state lighting load (280) includes a converter (230) and a control circuit (350). The converter (230) includes a half-bridge inverter (220) that functions as a boost inverter and output stage inverter, the half-bridge inverter having multiple switches (221, 222).
|Isolator circuit and semiconductor device|
An isolator circuit capable of two-way electrical disconnection and a semiconductor device including the isolator circuit are provided. A data holding portion is provided in an isolator circuit without the need for additional provision of a data holding portion outside the isolator circuit, and data which is to be input to a logic circuit that is in an off state at this moment is stored in the data holding portion.
|Power converting apparatus|
The invention has a power converting apparatus including a first inverter circuit connected to a dc power supply side; and a second inverter circuit connected to a load side, wherein the first inverter circuit converts dc power from the dc power supply into power having an absolute waveform of an ac waveform, and the second inverter circuit converts the power of the absolute waveform every single cycle thereof into ac power by alternately inverting the power.. .
|Control electronics for brushless motors|
An electronic control circuit for a brushless motor has an input power circuit providing a dc voltage and a microcontroller integrated circuit receiving the dc voltage. The microcontroller integrated circuit provides three-phase control signals according to a space vector control method.
|Inverter assembly and solar power plant comprising the same|
An inverter assembly having a dc circuit, inverter, and controller (ctrl) configured to control the inverter, the inverter being, for example, a multilevel inverter having a first half bridge (hb1) and a second half bridge (hb2). The controller (ctrl) can be adapted to provide a first operating state in which the controller (ctrl) operates the inverter as a full-bridge inverter.
|Electric motor and electrical apparatus equipped with same|
An electric motor includes a magnet rotor which is placed with an air gap interposed between it and a stator and has a magnetic pole portion formed from a plastic magnet which swells by hydrogen bonds, an inverter circuit, a dc-voltage conversion portion, a driving logic control portion, a supply current value control portion, a current value designation portion, a reference current value designation portion, and a correlation designation portion, wherein the correlation designation portion determines an average current value by changing the average current value linearly or non-linearly with respect to a reference current value, and the magnetic pole portion absorbs moisture to swell, thereby making the air gap smaller, at higher humidity than a reference humidity.. .
|Motor drive apparatus|
When a failure detection part detects a failure in an inverter circuit in a first power supply system, a drive control part stops the inverter circuit from driving a motor. An on/off control part turns off a first power supply relay of a power supply on/off part.
|Versatile zero-voltage switch resonant inverter for industrial dielectric barrier discharge generator applications|
A power system for a dielectric barrier discharge system, such as used for generating ozone, can include a full bridge inverter stage and parallel resonant tank outputting a signal for powering a dielectric barrier discharge cell stack. The inverter stage is controlled using a combination of pulse width modulation (pwm) and frequency modulation (fm) to enable soft switching through all load conditions—from full load to light load.
|Anode rotational drive device and x-ray imaging apparatus|
In order to provide an x-ray imaging apparatus including a two-phase anode rotation mechanism driving circuit having a small and light configuration, one end of the main stator coil is connected to a three-phase full-bridge inverter circuit and the midpoint between two semiconductor switches of the first arm, one end of the auxiliary stator coil is connected to the midpoint between two semiconductor switches of the second arm, and the other ends of the main stator coil and the auxiliary stator coil are connected to the midpoint between two semiconductor switches of the third arm. The semiconductor switches are switched using an inverting circuit and a delay circuit so that a first ac voltage is supplied to the one end of the main stator coil and a second ac voltage, which is shifted in phase by 90° from the first ac voltage, is supplied to the one end of the auxiliary stator coil..
A shift register is provided in which leakage of charges from a voltage at a set node is prevented to stabilize an output from a stage. The shift register includes stages for sequentially outputting scan pulses.
|Switching power supply device|
A switching power supply device includes: a chopper circuit that adjusts a dc voltage input through a reactor to a desired dc voltage by performing an on/off operation of a switching element; an inverter circuit that converts an output of the chopper circuit into a desired ac voltage; a first capacitor that is provided on a side of the inverter circuit relative to the switching element; a second capacitor that is provided on a side of the inverter circuit relative to the switching element; and a resistor that is in a resonant loop formed by three constituent elements that are the first capacitor, the second capacitor, and a wiring inductance between the chopper circuit and the inverter circuit, where the resistor is connected in series to the second capacitor and inserted between the dc bus-bars.. .
|Circuit for parallel bit test of semiconductor memory device|
A circuit for a parallel bit test (pbt) of a semiconductor memory device is provided. The pbt circuit includes a comparator circuit and an inverter circuit.
|Control device for electric vehicle|
A control device for an electric vehicle includes a converter circuit that converts a voltage input from an external power supply to a direct current having a predetermined value and outputs the direct current to a power storage unit, an inverter circuit that receives an arbitrary power supply from the external power supply or the power storage unit and converts power to an alternating current having a predetermined value, a converter control unit that controls the converter circuit based on a detection result of an abnormal state of the converter circuit and generates a protection status signal based on the detection result, and a inverter control unit that executes emergency control with respect to the inverter circuit, when the protection status signal is input, which indicates that the converter circuit is in an abnormal state.. .
|Emission driving unit, emission driver, and organic light emitting display device having the same|
In one aspect, an emission driving unit and an organic light emitting diode (oled) display having the same are disclosed. The emission driving unit includes an input signal generating circuit that receives a flm signal according to a first clock signal, receives a second clock signal according to the flm signal, and outputs a sequential input signal.
|Motor drive circuit|
A motor drive circuit that performs pwm driving of an ac motor includes: rectifying circuit that rectifies power from an ac power supply; a dc intermediate circuit that smoothes an output of the rectifying circuit and holds the smoothed output; an inverter circuit that executes a pwm control of a voltage applied to the ac motor based on dc power held in the dc intermediate circuit; and a filter circuit that is inserted between the ac power supply and the rectifying circuit, wherein the filter circuit includes a noise filter that is inserted between the ac power supply and the rectifying circuit and reduces harmonic noise, and a band elimination filter that is arranged at a posterior stage of the noise filter and reduces harmonic noise having a bandwidth, which can be generated by the pwm control.. .
To provide a semiconductor device including an inverter circuit whose driving frequency is increased by control of the threshold voltage of a transistor or a semiconductor device including an inveter circuit with low power consumption. An inverter circuit includes a first transistor and a second transistor each including a semiconductor film in which a channel is formed, a pair of gate electrodes between which the semiconductor film is placed, and source and drain electrodes in contact with the semiconductor film.
|Driver circuit and inverter circuit|
The present invention provides a safe circuit that can prevent an arm short, when a half-bridge circuit is configured by using a normally-on switching element, and the half-bridge circuit is used as a driver circuit or an inverter circuit. In a driver circuit configured by a half-bridge circuit in which one of input and output terminals of a first switching element 14 is connected to a first power-supply voltage v1 on a high-voltage side, and the first switching element 14 and a second switching element 15 are connected in series, a normally-off third switching element 16 is inserted between the second switching element 15 and a second power-supply voltage v2 on a low voltage side.
|Motor control device|
A motor controller comprising an inverter module including an inverter circuit coupled to a baseplate, wherein the baseplate includes cooling features; a cooling channel configured to receive a cooling fluid, wherein the cooling features extend into the cooling channel; a capacitor; and a laminated bus electrically coupling the capacitor to the inverter circuit and thermally coupling the capacitor to the cooling channel.. .
|Ac side soft charge circuit for variable frequency drives|
A voltage source inverter comprises a rectifier having an input for connection to a multi-phase ac power source and converting the ac power to dc power at an output. An inverter receives dc power and converts the dc power to ac power.
|Control apparatus for multi-phase rotary machine and electric power steering system using the same|
A first inverter circuit and a second inverter circuit are provided for a first winding set and a second winding set of a motor, respectively, and switch over power supply to the winding sets. A control unit controls operations of the inverter circuits.
|Driving control device of brushless motor|
A driving control device of a brushless motor includes an inverter circuit having: first arm-side switching elements that are connected between respective phases of respective armature coils of the brushless motor and one terminal of a power supply; and second arm-side switching elements that are connected between respective phases of the respective armature coils and the other terminal of the power supply, and a control unit, wherein, in a short-circuit braking according to a short-circuit braking signal, the control unit outputs a signal of turning off all the first arm-side switching element and outputs a signal of controlling the at least one of the second arm-side switching elements to perform a switching operation and turning on the other second arm-side switching elements.. .
|Pwm frequency pattern optimization for nvh|
An optimized pseudo-random period pattern can reduce audible noise in a system that includes an inverter circuit configured to provide power to an electric machine. A system can include a pwm optimization module (pom) comprising the ppp.