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Inverter patents

      

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 Gate drive circuit and display device using the same patent thumbnailGate drive circuit and display device using the same
A display device having a plurality of gate lines and a gate drive circuit is disclosed. The gate drive circuit includes a pull-up transistor configured to receive a first clock signal and to charge an output node to a voltage of the first clock signal based on a voltage of a q node.
Lg Display Co., Ltd.


 Driver circuit, display device including the driver circuit, and electronic appliance including the display device patent thumbnailDriver circuit, display device including the driver circuit, and electronic appliance including the display device
An object of the present invention is to provide a driver circuit including a normally-on thin film transistor, which driver circuit ensures a small malfunction and highly reliable operation. The driver circuit includes a static shift register including an inverter circuit having a first transistor and a second transistor, and a switch including a third transistor.
Semiconductor Energy Laboratory Co., Ltd.


 Semiconductor device and  manufacturing the same patent thumbnailSemiconductor device and manufacturing the same
It is an object to form a buffer circuit, an inverter circuit, or the like using only n-channel tfts including an oxide semiconductor layer. A buffer circuit, an inverter circuit, or the like is formed by combination of a first transistor in which a source electrode and a drain electrode each overlap with a gate electrode and a second transistor in which a source electrode overlaps with a gate electrode and a drain electrode does not overlap with the gate electrode.
Semiconductor Energy Laboratory Co., Ltd.


 Level shift circuit patent thumbnailLevel shift circuit
An input part is supplied with a low voltage from a low voltage power supply line. A level shift part and an output part are supplied with a high voltage from a high voltage power supply line.
Denso Corporation


 Control  inverter circuit patent thumbnailControl inverter circuit
A control method of an inverter circuit includes the following steps. Firstly, a half cycle of the ac output voltage is divided into a first stage and a second stage.
Delta Electronics, Inc.


 Line interactive ups and controlling method thereof patent thumbnailLine interactive ups and controlling method thereof
The present invention provides a line interactive ups, which comprises an ac input, an ac output, a chargeable and dischargeable device, a dc/ac inverter, a rectifying circuit, a full-bridge inverter, a capacitor, a switch, a charger, a boost circuit and a rectifying and buck circuit. An output of the boost circuit is connected to an input of the full-bridge inverter.
Eaton Manufacturing Lp, Glasgow, Succursale De Morges


 Logic elements comprising carbon nanotube field effect transistor (cntfet) devices and methods of making same patent thumbnailLogic elements comprising carbon nanotube field effect transistor (cntfet) devices and methods of making same
inverter circuits and nand circuits comprising nanotube based fets and methods of making the same are described. Such circuits can be fabricating using field effect transistors comprising a source, a drain, a channel region, and a gate, wherein the first channel region includes a fabric of semiconducting nanotubes of a given conductivity type.
Nantero, Inc.


 Motor drive control device, compressor, air-sending device, and air-conditioning apparatus patent thumbnailMotor drive control device, compressor, air-sending device, and air-conditioning apparatus
A motor drive control device includes a three-phase rectifier; a boosting circuit including a reactor, a switching element, and a backflow preventing element and boosts a direct-current bus voltage supplied from the three-phase rectifier; a smoothing capacitor; an inverter circuit; a boosting control unit; an inverter control unit; and a circuit protecting unit suppresses a ripple current flowing through the smoothing capacitor. In the circuit protecting unit, a correlation of an on-duty ratio of the switching element included in the boosting circuit, the output power of the inverter circuit, and an estimated ripple current are set.
Mitsubishi Electric Corporation


 Ac-ac power source conversion device and conversion method thereof patent thumbnailAc-ac power source conversion device and conversion method thereof
An ac-ac power source conversion device, comprising a rectifier circuit (10), an active power factor correction circuit (20), an automatic charge pumping circuit (30) and an inverter circuit (40), wherein the rectifier circuit is connected to an ac power source (100), receives the electric energy therefrom, and then converts the same into the dc electric energy for output; the active power factor correction circuit is connected to the rectifier circuit, receives the electric energy therefrom, and outputs the same after promoting a power factor; the automatic charging pumping circuit is connected to the active power factor correction circuit, receives the electric energy therefrom, and then adjusts and outputs same; and the inverter circuit is connected to the automatic charge pumping circuit and a load (200), receives the electric energy therefrom, converts same into the ac electric energy, and then outputs same to the load.. .
Hep Tech Co., Ltd.


 Power-transmitting device and wireless power-supplying system patent thumbnailPower-transmitting device and wireless power-supplying system
When a voltage across an element of a voltage converter or an inverter circuit has reached an upper limit of a withstanding voltage of the element and it is determined that received power of a power-receiving device has not reached a target value, an instruction for changing at least one of inductance and capacitance of an element which is disposed from a receiving-side pad to a filter circuit in the power-receiving device is transmitted from a power-transmitting device to the power-receiving device so as to satisfy a condition that the received power approaches a target value.. .
Ihi Corporation


Wireless power supplying apparatus

A wireless power supplying apparatus that supplies power to a power receiving apparatus spatially separated from the wireless power supplying apparatus by using a magnetic field, includes a loop conductor for supplying power that is formed on a substrate made of an insulator and that includes inductance; an inverter circuit that receives a dc voltage, converts the dc voltage into an ac voltage, and applies the ac voltage to the loop conductor; and a capacitor connected between one end of the loop conductor and at least one end of the inverter circuit. The loop conductor surrounds a periphery of a power supplying area within a surface of the substrate, at least part of the loop conductor includes an indented portion that is indented from the periphery, and the loop conductor has a total length longer than a peripheral length of the power supplying area..
Murata Manufacturing Co., Ltd.

Inter coupling of microinverters

A number of dc-ac microinverters driven by separate photovoltaic sub-arrays are physically combined to use common components such as a common, common-mode choke. Each microinverter is controlled by a common switching controller to produce a portion of the desired output such that ripple on the combined output is minimized, and each microinverter produces a common mode signal on its associated sub-array equal in frequency to the desired ac output frequency..

Switching power supply unit

Provided is a switching power supply unit that includes a pair of input terminals, a pair of output terminals, two transformers, two inverter circuits, a rectifying smoothing circuit, and a driver. The rectifying smoothing circuit includes eight rectifying devices, a first choke coil, a second choke coil, and a capacitance.
Tdk Corporation

Method for detecting failure of soft start and variable frequency device

A method for detecting failure of soft start includes: connecting a variable frequency device to a load; detecting an energy storage unit at a first voltage level; generating an output current to the load; detecting the energy storage unit changed from the first voltage level into a second voltage level; generating a reference voltage value according to the output current and determining whether a voltage difference value between the first voltage level and the second voltage level is larger than the reference voltage value; determining whether a voltage peak-to-peak value of the energy storage unit is smaller than a set value by the controller if the voltage difference value is larger than the reference voltage value; and controlling the inverter circuit to stop outputting the output current to the load if the voltage peak-to-peak value is smaller than the set value.. .
Delta Electronics, Inc.

Power conversion device including inverter circuit and control circuit

A power conversion device includes a first detection circuit that acquires input information about an ac voltage and/or an alternating current which are inputted to the power conversion device from an ac power supply, a rectifier circuit, an inverter circuit including a switch, and a control circuit that generates a pulse signal for the switch while the control circuit (a) determines, based on the input information, whether the rectifier circuit is in a state in which the rectifier circuit allows switching noise to propagate from the switch to the ac power supply and (b) changes a frequency of the pulse signal with time at least in a period in which the rectifier circuit is in the state.. .
Panasonic Intellectual Property Management Co., Ltd.

Power-transmitting device and wireless power transmission system

A power-transmitting device transmits ac power generated in an inverter circuit to a power receiving device in a wireless manner by magnetically coupling a power-transmitting coil to a power-receiving coil of the power receiving device. The power-transmitting device is provided with a power transmission controller which controls the aforementioned inverter circuit to change the ac power in accordance with information relating to the state of power transmission to a load connected to the power-receiving device..
Ihi Corporation

Method and bypassing cascaded h-bridge (chb) power cells and power sub cell for multilevel inverter

Multilevel power converters, power cells and methods are presented for selectively bypassing a power stage of a multilevel inverter circuit, in which a single relay or contactor includes first and second normally closed output control contacts coupled between a given power cell switching circuit and the given power cell output, along with a normally open bypass contact coupled across the power stage output, with a local or central controller energizing the coil of the relay or contactor of a given cell to bypass that cell.. .
Rockwell Automation Technologies, Inc.

Pulsed level shift and inverter circuits for gan devices

Gan-based half bridge power conversion circuits employ control, support and logic functions that are monolithically integrated on the same devices as the power transistors. In some embodiments a low side gan device communicates through one or more level shift circuits with a high side gan device.
Navitas Semiconductor Inc.

Power conversion device and three-phase alternating current power supply device

Provided is a power conversion device including: a conversion device for each phase which converts dc voltage inputted from a dc power supply, to voltage having an ac waveform to be outputted to each phase with respect to a neutral point of three-phase ac; and a control unit which controls these conversion devices. Each conversion device includes: a first converter which has a dc/dc converter including an isolation transformer, and a capacitor, and which converts the inputted dc voltage to voltage containing a pulsating dc voltage waveform corresponding to the absolute value of the ac waveform to be outputted; and a second converter which is provided at a stage subsequent to the first converter and has a full-bridge inverter, and which inverts the polarity of the voltage containing the pulsating dc voltage waveform, per one cycle, thereby converting the voltage to voltage having the ac waveform..
Sumitomo Electric Industries, Ltd.

Resonant inverter and isolated resonant power supply device

A resonant inverter includes an input terminal, a first switch, a second switch, a transformer, a first resonant circuit, and a second resonant circuit. To the input terminal, an input voltage is applied.
Tdk Corporation

Method and controlling an electrified powertrain system of a vehicle

A method for controlling a powertrain system includes deactivating a motor disconnect clutch during vehicle operation. Motor speed is decreased to a first inactive speed threshold and an inverter circuit is controlled to an inactive state while monitoring the motor speed.
Gm Global Technology Operations Llc

Refrigeration device

A refrigeration device includes a high-voltage electrical parts group having reactors and cooled elements, a low-voltage electrical parts group, a printed wiring board with the electrical parts groups mounted, and a refrigerant jacket that uses refrigerant flowing through the refrigerant circuit to cool the cooled elements. The high-voltage electrical parts group form an interleaved power supply circuit.
Daikin Industries, Ltd.

Method and spectrum spreading of a pulse-density modulated waveform

Methods and systems are provided for spreading spectral density of pulse streams during digital to analog conversion. An example spreading circuit may comprise an accumulator circuit, a bit generator circuit, a comparator circuit, and an inverter circuit.
Entropic Communications, Llc

A double auxiliary resonant commutated pole three-phase soft-switching inverter circuit and modulation method

Provided are a double auxiliary resonant commutated pole three-phase soft-switching inverter circuit and a modulation method. The circuit includes a three-phase main inverter circuit and a three-phase double auxiliary resonant commutator circuit.
Shenyang University Of Technology

Wireless power transfer device and wireless power transfer system

A wireless power transfer system according to an embodiment of the present invention is a wireless power transfer system having a receiving part for receiving power from a transmitting part, wherein the transmitting part comprises: a power conversion part comprising a full bridge inverter; and a control part for controlling the power conversion part using a pulse width modulation (pwm) control signal, the duty ratio of the pwm control signal being determined by a duty ratio in which the ratio of the magnitude of harmonics to the magnitude of a fundamental frequency among frequency components of the output signal of the power conversion part is a minimum.. .
Lg Innotek Co., Ltd.

Inverter-integrated electric compressor

An inverter-integrated electric compressor includes an inverter housing portion, an inverter device including a substrate (17) having an inverter circuit mounted thereon, the inverter device being integrally incorporated in the inverter housing portion, and a busbar assembly (29) formed by a uvw busbar covered by a resin case (33), the uvw busbar being configured to conduct ac power converted by the inverter circuit from the substrate (17) side to a motor terminal. In such an inverter-integrated electric compressor, the busbar assembly (29) includes an adhering partition (42) to be adhered to an end surface of the substrate (17) using an adhesive (43), the adhering partition (42) being provided in an upright manner on a lower surface of the resin case (33) of the busbar assembly (29); a height (h) and a gap (s) of the adhering partition (42) relative to the end surface of the substrate (17) are set as appropriate; and the adhering partition (42) and the end surface of the substrate (17) are adhered to each other using the adhesive (43)..
Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd.

Load control device for a light-emitting diode light source

A load control device for controlling the amount of power delivered to an electrical load is able to operate in a normal mode and a burst mode. The load control device may comprise a control circuit that activates an inverter circuit during active state periods and deactivates the inverter circuit during inactive state periods.
Lutron Electronics Co., Inc.

Semiconductor device and power converter using the same

To suppress a temperature rise of a chip accompanying a production of large output by a power converter, and to reduce a size of the power converter. A power semiconductor device includes: a first power semiconductor element to configure an upper arm of an inverter circuit; a second power semiconductor element to configure a lower arm of the inverter circuit; a first lead frame to transmit power to the first power semiconductor element; a second lead frame to transmit power to the second power semiconductor element; a first gate lead frame to transmit a control signal to the first power semiconductor element; and a sealing member to seal the first power semiconductor element, the second power semiconductor element, the first lead frame, the second lead frame, and the first gate lead frame.
Hitachi Automotive Systems, Ltd.

Alternating current (ac)-direct current (dc) conversion circuit and control method thereof

An ac-dc conversion circuit includes an input rectifier circuit, a primary side input filtering capacitor, a primary side inverter circuit, a drive circuit, an isolation transformer, a secondary side rectifier circuit, a secondary side capacitors, and a control circuit connected between the secondary side output filtering capacitor and the drive circuit, where the drive circuit is connected to the primary side inverter circuit. The primary side inverter circuit and the primary side input filtering capacitor form a loop, so as to form a clamping resonant circuit.
Shenzhen Boyn Electric Co., Ltd.

Single-phase inverter

In an inverter circuit, more particularly in a single-phase inverter, soft switching is performed with a simple configuration to prevent switching loss of a switching element. A resonance circuit is configured by a resonant capacitor provided on the power supply side of a bridge circuit constituting a single phase inverter, a resonant inductor provided on the output side of the bridge circuit, and the bridge circuit.
Kyosan Electric Mfg. Co., Ltd.

Gate driving circuit, inverter circuit, and motor control device

This disclosure discloses a gate driving circuit configured to control conduction or shutdown of a semiconductor switching element. The gate driving circuit includes a gate control part, a gate resistor, and a short circuit part.
Kabushiki Kaisha Yaskawa Denki

Motor drive control apparatus, compressor, fan, and air-conditioning apparatus

A motor drive control apparatus according to the present invention includes: a three-phase rectifier to rectify an ac voltage supplied from a three-phase ac source; a booster circuit including a reactor, a switching element, and a backflow preventing element, to boost a dc bus voltage supplied from the three-phase rectifier; a smoothing capacitor to smooth an output of the booster circuit; and an inverter circuit to convert the dc bus voltage smoothed by the smoothing capacitor into an ac voltage and supplying the ac voltage to a motor. During a starting operation of a boosting operation of the booster circuit or a stopping operation of the boosting operation thereof, a rotation speed of the motor is fixed..
Mitsubishi Electric Corporation

Motor drive device

A motor drive device includes: an inverter circuit having a smoothing capacitor; a drive circuit portion which outputs an operation signal to the inverter circuit; a control portion which controls the drive circuit portion; and an operating voltage generation portion which supplies power to the drive circuit portion and the control portion by generating an operating voltage for the drive circuit portion and the control portion. The inverter circuit converts a dc voltage from a first power supply to an ac voltage and outputs the ac voltage to a multi-phase motor coil.
Denso Corporation

System for starting large-scale power load in micro-grid

A system for staring a large-scale power load in a micro grid comprises a pcc grid connection switch, a micro grid alternating-current bus, an active power filter (apf), an energy storage inverter, an energy storage battery, a current-limiting resistor r, contactors k1-k3, a time relay kt, a power supply relay board, a micro grid maser control system, a frequency converter rectifying circuit, a frequency converter filter circuit, and a frequency converter inverter circuit. There are the advantages: an output torque of a power load can be effectively improved by using a variable frequency starting apparatus, and a starting current is also small; the provided method can effectively reduce a harmonic current when a variable frequency starting apparatus starts a power load, the phenomenon that two power sources supply power on a direct-current side of the variable frequency starting apparatus at the same time is avoided, thereby improving the stability and the economy of a micro grid..
Hebei Electric Power Commissioning Institute

Semiconductor device, inverter circuit, driving device, vehicle, and elevator

A semiconductor device according to an embodiment includes a plurality of circuit units each includes a first electrode, a second electrode, a switching element portion including first and second switching elements electrically connected between the first electrode and the second electrode, and a capacitor portion including a capacitor electrically connected between the first electrode and the second electrode and stacked with the switching element portion. In two of the adjacent circuit units, the switching element portion of one circuit unit and the capacitor portion of the other circuit unit are adjacent to each other, the capacitor portion of the one and the switching element portion of the other are adjacent to each other, the first electrode of the one and the first electrode of the other are adjacent to each other, and the second electrode of the one and the second electrode of the other are adjacent to each other..
Kabushiki Kaisha Toshiba

Power transmitter, resonance-type contactless power supply and control method therefor

The present disclosure relates to a power transmitter, a resonance-type contactless power supply and a control method. The inverter circuit is controlled to provide a high-frequency ac current with a voltage strength parameter so that a current strength parameter (e.g.
Silergy Semiconductor Technology (hangzhou) Ltd.

Apparatuses and wireless power transmitters having multiple transmit coils and related method

A wireless power transmitter may include a bridge inverter and a plurality of parallel paths operably coupled to the bridge inverter. Each path includes a resonance tank including a transmit coil coupled with at least one resonance capacitor, a first switch serially coupled with the resonance tank and switching node a of the bridge inverter, a first clamping element in parallel with the first switch, a second switch serially coupled with the resonance tank and switching node b of the bridge inverter, and a second clamping element in parallel with the second switch.
Integrated Device Technology, Inc.

Semiconductor device, inverter circuit, driving device, vehicle, and elevator

A semiconductor device according to the embodiments includes a sic layer having a first plane, an insulating layer, and a region between the first plane and the insulating layer, the region including at least one element in the group consisting of be (beryllium), mg (magnesium), ca (calcium), sr (strontium), and ba (barium), a full width at half maximum of a concentration peak of the element being equal to or less than 1 nm, and when a first area density being an area density of si (silicon) and c (carbon) including a bond which does not bond with any of si and c in the sic layer at the first plane and a second area density being an area density of the element, the second area density being equal to or less than ½ of the first area density.. .
Kabushiki Kaisha Toshiba

Semiconductor device and inverter circuit

A semiconductor device according to embodiments includes a p-type sic layer having a first plane, a gate electrode, and a gate insulating layer provided between the first plane of the sic layer and the gate electrode. The gate insulating layer includes a first layer, a second layer, and a first region.
Kabushiki Kaisha Toshiba

Semiconductor device, inverter circuit, and vehicle

A semiconductor device according to embodiments described herein includes a p-type sic layer, a gate electrode, and a gate insulating layer between the sic layer and the gate electrode. The gate insulating layer includes a first layer, a second layer, a first region, and a second region.
Kabushiki Kaisha Toshiba

Semiconductor device, inverter circuit, driving device, vehicle, and elevator

A semiconductor device according to an embodiment includes a plurality of circuit units, and each of the circuit units includes, a first electrode, a second electrode; a first switching element and a second switching element electrically connected in series between the first electrode and the second electrode, and a third electrode electrically connected between the first switching element and the second switching element. The circuit units are arranged in an annular shape..
Kabushiki Kaisha Toshiba

Semiconductor device, inverter circuit, driving device, vehicle, and elevator

A semiconductor device according to an embodiment includes a plurality of circuit units each including a substrate, a first electrode on a first side of the substrate, a second electrode aligned with the first electrode on the first side of the substrate, a third electrode on a second side of the substrate, and a first switching element and a second switching element. The switching elements are aligned on the substrate between the first electrode, second electrode and third electrode, electrically connected in series between the first electrode and the second electrode, and having the third electrode electrically connected therebetween.
Kabushiki Kaisha Toshiba

Power conversion device

An object is to reduce a discharging time required for discharging residual charges of a capacitor. A power conversion device according to the present invention includes: an inverter circuit unit; a step-up circuit unit; a smoothing capacitor; and a step-up circuit control unit which controls the step-up circuit unit, wherein the step-up circuit unit has a first switching element, a second switching element connected electrically in series to the first switching element, and a reactor having a conducting current controlled by switching operation of the first switching element and the second switching element, and the step-up circuit control unit has a first control mode of controlling the switching operation of the first switching element and the second switching element by changing a duty command value and outputting a stepped up voltage from the step-up circuit unit, and a discharge control mode of discharging electric charges stored in the smoothing capacitor into the reactor, with the duty command value fixed to a predetermined value..
Hitachi Automotive Systems, Ltd

Power conversion device

The resonant inverter circuit includes two or more switch elements. A detector detects an output current of the switch elements.
Mitsubishi Electric Corporation

Novel inverter circuit

The inventive technology, in certain embodiments, may be generally described as a solar power generation system with a converter, which may potentially include two or more sub-converters, established intermediately of one or more strings of solar panels. Particular embodiments may involve sweet spot operation in order to achieve improvements in efficiency, and bucking of open circuit voltages by the converter in order that more panels may be placed on an individual string or substring, reducing the number of strings required for a given design, and achieving overall system and array manufacture savings..
Ampt, Llc

Portable alternating current inverter having reduced imipedance losses

A portable power supply apparatus is provided having reduced impedance losses. The portable power supply apparatus is comprised of: a portable housing; a battery system residing in the housing; and an inverter circuit residing in the housing.
Black & Decker Inc.

Inrush current suppression circuit

The present invention provides an inrush current suppression circuit that is provided in an electric power conversion apparatus and suppresses inrush current that occurs when power is turned on, the electric power conversion apparatus including an inverter circuit and a drive power circuit that generates direct voltages of two levels as drive voltages, wherein the inrush current suppression circuit includes: an inrush current prevention resistor disposed between a converter circuit that generates dc power to be supplied to the inverter circuit and a smoothing circuit; a relay connected in parallel to the inrush current prevention resistor; and a relay control circuit that applies to the relay a higher direct voltage to shift the relay to a closed state, and after the relay is set to the closed state, applies to the relay a lower direct voltage to retain the closed state.. .
Mitsubishi Electric Corporation

Electric motor control device

The electric motor control device includes: an inverter circuit 20 which converts dc power of a dc power supply 90 into ac power; and a switching control section 60 which performs on/off control of a semiconductor switching element composing the inverter circuit. The switching control section 60 includes: a power-supply-side abnormality determination section 62 which determines whether a power-supply-side abnormal state is established in which regenerative energy from an electric motor 10 cannot be regenerated to the dc power supply; and a switching frequency changeable section 63 which changes, when the power-supply-side abnormality determination section has determined that the power-supply-side abnormal state has been established, a switching frequency of the semiconductor switching element such that an overall loss, which is a total of loss in the inverter and loss in the electric motor, is increased..
Mitsubishi Electric Corporation

Power conversion device

Even in the case in which an overvoltage is generated when a vehicle is in a non-operation state, the overvoltage can be suppressed. A power conversion device is connected to a three-phase motor mounted on a vehicle and includes an inverter circuit, a gate drive substrate, and a motor control substrate.
Hitachi Automotive Systems, Ltd.

Inverter circuit with voltage limitation

The invention relates to an inverter circuit (80) which comprises first and second switching means (1, 2) that are connected, in an electrical path (10), in series to one another and parallel to a dc link capacitor (20). Said inverter circuit (80) also comprises an output (9) and two inputs (11, 12) which are each electrically-conductively connected to a pole of the dc link capacitor (20) and can each be connected to a pole of an energy store.
Robert Bosch Gmbh

Inverter circuit and distributed power source system including the same

Provided are: a smoothing capacitor connected in parallel to the dc power source; a bridge circuit including switching elements for converting dc power to ac power, flywheel diodes connected in reversely parallel, and flywheel-and-separation diodes connected in series to the flywheel diodes and serving concurrently as flywheel and separation diodes; an interconnection reactor on an output side, provided on ac output lines connecting the bridge circuit and an ac power source; and a separation circuit for separating the smoothing capacitor and the interconnection reactor from each other during a flywheel period of the flywheel diodes. The separation circuit includes separation switching elements and the flywheel-and-separation diodes.
Tabuchi Electric Co., Ltd.





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