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Inverter patents



      
           
This page is updated frequently with new Inverter-related patent applications. Subscribe to the Inverter RSS feed to automatically get the update: related Inverter RSS feeds. RSS updates for this page: Inverter RSS RSS


Date/App# patent app List of recent Inverter-related patents
01/22/15
20150022974
 Power conversion apparatus and electric vehicle patent thumbnailnew patent Power conversion apparatus and electric vehicle
The metallic case of a power conversion apparatus includes a casing having a side wall, as well as an upper case and a lower case, a first area being formed between a cooling jacket provided at the inner periphery of the side wall and the lower case, the metal base plate dividing the first area between the cooling jacket and the upper case into a lower side second area and an upper side third area, first and second power modules being fastened to a top surface and a capacitor module being provided in the first area, driving circuits that drive inverter circuits of the power modules respectively being provided in the second area, and a control circuit that controls the driver circuits being provided in the third area.. .
Hitachi, Ltd.
01/22/15
20150022125
 Electric tool patent thumbnailnew patent Electric tool
An electric tool for driving a tip tool, the electric tool includes: a removable battery; the brushless motor configured to generate a driving force for driving the tip tool; an inverter circuit configured to supply drive power from the removable battery to the brushless motor using a plurality of semiconductor switching elements; a controller configured to control the inverter circuit to control rotation of the brushless motor; a temperature detector configured to detect a temperature of the brushless motor or the semiconductor switching elements; and a voltage detector configured to detect a voltage of the battery. The brushless motor is driven such that a duty ratio of pwm drive signal for driving the semiconductor switching elements is determined based on relationship between the temperature detected by the temperature detector and the voltage detected by the voltage detector..
Hitachi Koki Co., Ltd.
01/15/15
20150015556
 All n-type transistor inverter circuit patent thumbnailAll n-type transistor inverter circuit
This disclosure provides systems, methods and apparatus for an all n-type transistor inverter circuit. A circuit can include an input thin film transistor (tft), a pull-down tft, a discharge tft, a first pull-up tft, a second pull-up tft, and a floating capacitor.
Pixtronix, Inc.
01/15/15
20150015068
 Multi-port energy storage system and control method thereof patent thumbnailMulti-port energy storage system and control method thereof
A multi-port energy storage system includes a bi-directional power conversion circuit, a dc-ac inverter circuit, an electric energy storage facility, a first ac port, a second ac port and an ac switch. The multi-port energy storage system controllably provides various classifications of power supply quality via the first ac port and the second ac port..
Ablerex Electronics Co., Ltd.
01/08/15
20150009731
 Multilevel inverter patent thumbnailMultilevel inverter
The present disclosure proposes an input power of each unit power cell of a cascaded h-bridge inverter that is mutually insulated. To this end, the present disclosure includes a phase shift transformer configured to output a voltage of predetermined phase by receiving an ac input power having a fixed frequency, and a plurality of unit power cells serially-connected configured to output a voltage having a predetermined phase by receiving a voltage provided by the phase shift transformer, wherein the phase shift transformer is configured to include the number of phase shifts corresponding to the number of the plurality of unit power cells..
Lsis Co., Ltd.
01/01/15
20150003021
 Inverter module patent thumbnailInverter module
An inverter module converts a dc current generated by a photovoltaic panel to an ac current. The inverter module includes a housing and a pcb.
Chicony Power Technology Co., Ltd.
01/01/15
20150002227
 Mmic power amplifier patent thumbnailMmic power amplifier
A microwave integrated circuit includes a substrate and a power amplifier on the substrate. The power amplifier includes a power divider circuit having an input configured to receive an input rf signal, a base amplifier having an input coupled to a first output of the power divider circuit and a peaking amplifier having an input coupled to a second output of the power divider circuit and an output coupled to an output combining node.
Cree, Inc.
12/25/14
20140376319
 Delay circuit and semiconductor memory device patent thumbnailDelay circuit and semiconductor memory device
According to an embodiment, a load adjusting circuit adjusts the load of an inverter circuit based on a threshold voltage of a first conductive type transistor provided on the inverter circuit, and a driving force adjusting circuit adjusts the driving force of the inverter circuit based on the threshold voltage of the first conductive type transistor.. .
Kabushiki Kaisha Toshiba
12/25/14
20140376268
 Metal working power supply converter system and method patent thumbnailMetal working power supply converter system and method
A power supply for welding, cutting and similar operations includes a dual two-switch forward converter. The converter has two inverter circuits coupled in parallel but controlled to provide output power in an interleaved fashion.
Illinois Tool Works Inc.
12/25/14
20140375378
 Efficiency for charge pumps with low supply voltages patent thumbnailEfficiency for charge pumps with low supply voltages
A charge pump system uses a helper pump to use in generating a boosted clock signal to use for the stages capacitor of a charge pump and also for the gate clock of the stage. This can be particularly useful in applications with lower supply levels, where a the helper pump can be used to provide an amplitude higher than the supply level, that can then be added to the supply level for the boosted clock signal and then added again to the supply level for the gate clock.
Sandisk Technologies Inc.
12/25/14
20140374397

Method and providing welding type power


A welding-type power supply includes a controller, a preregulator, a preregulator bus, and an output converter. The controller has a preregulator control output and an output converter control output.
Illinois Tool Works Inc.
12/18/14
20140369090

Inverter apparatus


In an inverter apparatus, an output voltage of an active filter circuit that steps up and smoothes a dc voltage is converted into an ac voltage by an inverter circuit. The active filter circuit includes a capacitor and a rectifier device connected between an input node and an output node.
Murata Manufacturing Co., Ltd.
12/18/14
20140368120

Ballast with anti-striation circuit


A ballast comprises an inverter circuit for providing an oscillating current signal for energizing the at least one lamp. The inverter circuit comprises a first switching component and a second switching component each having a collector terminal, a base terminal, and an emitter terminal.
Osram Sylvania Inc.
12/11/14
20140362607

Magnetic integration double-ended converter


A magnetic integration double-ended converter with an integrated function of a transformer and an inductor includes an integrated magnetic member having a magnetic core with three magnetic columns having at least three windings (np, ns1, ns2) and at least one energy storage air gap, where a primary winding (np) and a first secondary winding (ns1) are both wound around a first magnetic column or are both wound around a second magnetic column and a third magnetic column, and a second secondary winding (ns2) is wound around the second magnetic column; an inverter circuit with double ends symmetrically working, acting on the primary winding (np); and a group of synchronous rectifiers (sr1, sr2), gate electrode driving signals of which and gate electrode driving signals of a group of power switch diodes (s1, s2) of the inverter circuit with the double ends symmetrically working complement each other.. .
12/04/14
20140358138

Gain compensation for a full bridge inverter


An electrosurgical generator and related systems and methods using a gain-compensated full bridge topology. Gain nonlinearity is corrected by applying impedance and phase correction factors to a control loop to achieve a linear gain structure.
12/04/14
20140354074

Power feed device of inductive charging device


A power feeding device of a non-contact charging device includes a power factor improvement circuit which converts an ac power supply to dc, and improves a power factor, a smoothing capacitor connected to an output end of the power factor improvement circuit, an inverter circuit which includes a plurality of switching elements, and generates an ac signal using a voltage of the smoothing capacitor as a power supply, a power feeding section which feeds power based on the ac signal to a power receiving device, and a control circuit which modulates a duty factor of each of the switching elements of the inverter circuit in synchronization with the ac power supply, wherein the control circuit controls the plurality of switching elements so that an increment of the modulated duty factor is not equal to a decrement of the modulated duty factor.. .
12/04/14
20140354073

Power feed device of inductive charging device


A power feeding device of a non-contact charging device includes a power factor improvement circuit which converts an ac power supply to dc, and improves a power factor, a smoothing capacitor connected to an output end of the power factor improvement circuit, an inverter circuit which includes a plurality of switching elements, and generates an ac signal using a voltage of the smoothing capacitor as a power supply, a power feeding section which feeds power based on the ac signal to a power receiving device, and a control circuit which modulates at least one of a duty factor or an operation frequency of each of the switching elements of the inverter circuit in synchronization with the ac power supply.. .
11/27/14
20140347115

Voltage level translator


A voltage level translator includes an inverter circuit configured to switch an output of the inverter circuit between a first voltage level and a second voltage level. The voltage level translator also includes a capacitor connected to the output of the inverter circuit.
11/27/14
20140347067

Fault detection device for inverter system


To provide a fault detection device for an inverter system, that detects a fault in the inverter system including an inverter circuit 2 that converts dc power into ac power and a motor 5 driven thereby. When a driving start signal sig1 of the inverter circuit 2 is input, a test voltage applying unit 20 applies a predetermined first test voltage to a current measuring unit 10 that measures current flowing in the inverter circuit 2, and it is determined whether the current measuring unit 10 has failed, based on the first test voltage.
11/27/14
20140346884

Power converter


A power converter that can supply constant voltage to a load even upon fluctuation of voltage of an ac power source includes an inverter circuit resulting from connecting switching elements in series, the inverter circuit being connected to both ends of a dc power source series circuit resulting from connecting in series two dc power sources; an ac output terminal that is connected to a connection point of the switching elements; another ac output terminal that is connected to a connection point of the dc power sources; and a bidirectional switch element including one end connected to the ac output terminal u and another end connected to a terminal of an ac power source.. .
11/27/14
20140346877

Power converter


A power converter can include an inverter including, connected in series, switching elements, the inverter circuit being connected to both ends of a dc power source series circuit resulting from connecting in series a dc power source and a dc power source. Also included can be an ac output terminal that is connected to a connection point of the switching element and the switching element, an ac output terminal that is connected to a connection point of the dc power source and the dc power source, a bidirectional switch element one end of which is connected to the ac output terminal and the other end of which is connected to a terminal of an ac power source and a bidirectional switch element one end of which is connected to the ac output terminal and the other end of which is connected to the ac power source..
11/27/14
20140346861

Vehicle auxiliary power supply device and overcurrent protection method thereof


A vehicle auxiliary power supply device includes a resonant inverter circuit that converts dc input into a desired ac voltage and outputs the ac voltage and a control unit. The control unit includes a resonance-time managing unit managing resonance time of current flowing in the resonant inverter circuit, a gate-off-command generating unit detecting overcurrent flowing in the resonant inverter circuit based on detected current of a current detector, and, when the overcurrent is detected, generating, based on detected current of the current detector and resonance time managed by the resonance-time managing unit, a gate-off command to turn off switching elements included in the resonant inverter circuit after the elapse of time after which current flowing in the switching elements becomes zero for the first time, and a gate-signal generating unit generating a gate signal that controls the switching elements to be turned off when the gate-off command is input..
11/20/14
20140339996

Ballast and ballast control method and apparatus, for example anti-arcing control for electronic ballast


A technique for providing control for an electronic ballast by responding to the current in the common bus (dc power rail) betweeen a boost circuit such as a power factor circuit (pfc) and an output (such as a high frequency (hf) inverter) circuit, and adjusting, changing or shutting down either the power factor control circuit or the inverter circuit when the power going into the inverter circuit is above a threshold. Power going into the inverter circuit may be measured by a resistor, and temperature compensation may be provided.
11/13/14
20140333219

Led lighting unit with color and dimming control


Method and apparatus for a led lighting unit (200), including an inverter circuit (210) electrically coupled to a led module (220) having a pair of antiparallel led groupings. The inverter circuit (210) provides for color and/or dimming control of the led module (220).
11/06/14
20140328102

Power source inverter for use with a photovoltaic solar panel


An improved topology is presented for a single phase power source inverter that is designed to minimize double frequency ripple. The inverter circuit includes: a capacitor coupled in parallel across a direct current (dc) voltage source; a bridge circuit having three legs electrically connected in parallel with the voltage source and each other, such that each leg of the bridge circuit being comprised of two switches coupled in series with each other; a low pass filter electrically connected between the bridge circuit and a load; an auxiliary inductor having a first terminal electrically connected to one leg of the bridge circuit and a second terminal electrically connected to another leg of the bridge circuit and the load; and a controller that drives the switches of the bridge circuit in a manner that maintains instantaneous power transfer across the bridge circuit constant..
10/30/14
20140321180

Inverter circuit, power converter circuit, and electric vehicle


An object is to reduce, with the control circuit of the full-bridge inverter circuit, distortions in an output signal of the inverter circuit resulting from an error in control of the switching of the high-side transistors and low-side transistors included in the first half-bridge circuit and the second half-bridge circuit. The pulse width of a signal that controls on/off of the high-side transistors and low-side transistors included in the first half-bridge circuit and the second half-bridge circuit is reduced, i.e., the duty cycle of the signal is reduced.
10/30/14
20140319952

Main motor for railway vehicle


The main motor for a railway vehicle is rotationally driven upon receiving an ac power supplied from an inverter circuit that includes a switching element formed by using a wide bandgap semiconductor. The inverter circuit applies a voltage having a pwm waveform to the main motor for a railway vehicle in at least part of a speed range of an electric vehicle.
10/30/14
20140319921

Circuit and extracting amplitude and phase information in a resonant system


A resonant power transfer system includes resonant circuitry (26) including an inductor coil (59) and a resonant capacitor (51) coupled to a first terminal (27) of the inductor coil, wherein the inductor coil and the resonant capacitor resonate to produce an excitation signal (is) and a state variable signal (vcs1). Sub-sampling circuitry (30) samples first and second points of the state variable signal at a rate which is substantially less than the rf frequency of the state variable signal.
10/30/14
20140319495

Novel organic compound, organic light-emitting device, and image display system


An organic compound has a dibenzo[8,9:10,11]tetrapheno[5,6-b]carbazole skeleton as a basic skeleton. An organic light-emitting device includes an anode, a cathode, and an organic compound layer including the organic compound.
10/23/14
20140312821

Inverter device for electric vehicle


An inverter device for an electric vehicle includes an inverter circuit that controls an electric motor connected to a wheel via a connecting member and a control unit that controls torque of the electric motor. The control unit includes a current control unit that executes control so that a q-axis current command for the electric motor matches a current flowing through the electric motor, and a limiter unit that puts limitations so that a magnitude of the q-axis current command does not become equal to or smaller than a preset predetermined value..
10/23/14
20140312817

Electronic circuit and triggering a semiconductor switch


An electronic circuit comprises at least one semiconductor switch mounted with its switching path in series with an inductive load to be triggered, and at least one freewheeling element that interacts with the semiconductor switch during switching phases and is also mounted in series with the load. A control unit controls a control connection of the semiconductor switch with a variable control current as a function of the time profile of a voltage measured at the freewheeling element and/or as a function of the time profile of the voltage measured at the switching path.
10/16/14
20140306631

Method for operating an energy supply unit for a motor vehicle electrical system


A method for operating an energy supply unit for a motor vehicle electrical system, including at least one first subsystem and one second subsystem having different voltage levels, the energy supply unit including an electric machine which is connected via a converter circuit to the first subsystem and the second subsystem. In a first operating mode, a switchable switch element of the converter circuit which connects the converter circuit to the second subsystem is opened, the converter circuit is activated as an inverter circuit and the electric machine is motor or generator operated.
10/16/14
20140306563

Mechanical-electrical integrated electric drive system


Disclosed is a mechanical-electrical integrated electric drive system capable of returning common mode current from a rotary electric machine's side to a virtual neutral point of a power-conversion device inside the electric drive system, where the system comprises a rotary electric machine that includes a rotor, a stator having a stator core including armature windings, and a housing holding the stator and having ac terminals of the armature windings arranged thereon; a power conversion device that is fixed to the periphery of the housing and includes an inverter circuit and ac bus bars connecting the inverter circuit with the ac terminals; conductor rings that are arranged in contact with the stator core to collect common mode current deriving from stray capacitance of the stator; and a connection wire that connects the conductor bar to a virtual neutral point on the dc input side of the inverter circuit.. .
10/09/14
20140300398

Programmable delay circuit


A delay circuit includes at least one main inverter configured to receive an input signal and output a delayed output signal and at least one switchable inverter connected in parallel with the main inverter circuit. The switchable inverter is configured to decrease a delay between the input signal and the delayed output signal based on the switchable inverter being turned on..
10/02/14
20140293682

Memory bitcell clusters employing localized generation of complementary bitlines to reduce memory area, and related systems and methods


Embodiments disclosed include memory bitcell clusters employing localized generation of complementary bitlines to reduce memory area. The memory bitcell clusters disclosed may be static random access memory (sram) used as central processing unit (cpu) register files.
10/02/14
20140292377

High voltage inverter utilizing low voltage oxide mofset devices


An inverter circuit includes an input stage and an output stage, each including pairs of complementary transistors having low-voltage oxides. The transistors within the input stage are configured to receive the input signal and to provide control voltages in response to input signal voltage variations.
09/25/14
20140288352

Percutaneous cable with redundant conductors for implantable blood pump


A blood pump system for left ventricle assist has an implantable pump unit having a multiphase stator having a plurality of windings connected between respective junctions for forming first, second, and third phases. An external control unit comprises an h-bridge inverter having first, second, and third phase legs.
09/25/14
20140285065

Piezoelectric element drive circuit


A piezoelectric element drive circuit includes an h bridge circuit, an lpf-attached differential amplifier circuit, an amplifier circuit, and an inverter circuit. First and second drive signals output from the h bridge circuit and having opposite phases are applied to a piezoelectric element.
09/18/14
20140271237

Vacuum pump


An estimating section detects a signal including counter electromotive voltage information of the motor, and estimating a magnetic pole electric angle and a rotational speed of the motor. A driving current controller repeats generation and cut-off of the driving current supplied from a power supply to the motor via the inverter circuit or regenerated from the motor to the power supply in a low-speed period between a stopped state and a predetermined rotational speed in an accelerating operation at a motor starting time or a decelerating operation at a motor stopping time.
09/18/14
20140268959

Bidirectional power converter


A bidirectional power converter that can be used in an electric vehicle to perform ac to dc power conversion to charge the electric vehicle's battery and to perform dc to ac power conversion to export power to run external electrical loads is described. The bidirectional power converter may include an ac interface coupled to a cyclo-inverter circuit, and a dc interface coupled to a h-bridge circuit.
09/18/14
20140268932

Dc-ac inverter with soft switching


Provided are single phase and multiple phase dc-ac inverters with soft switching, and related methods and uses. The dc-ac inverters comprise at least one voltage source inverter circuit or at least one current source inverter circuit having a dc input and an ac output including a first component at a fundamental frequency and a ripple component at a frequency higher than the fundamental frequency; wherein the ripple component is of a sufficient magnitude that the voltage source inverter circuit output current reverses polarity and allows the at least one inverter circuit to operate with zero voltage switching; or wherein the ripple component is of a sufficient magnitude that the current source inverter circuit output voltage reverses polarity and allows the at least one inverter circuit to operate with zero current switching.
09/18/14
20140268908

Converter topologies


Inverter topologies for converting an input direct current (dc) waveform from a dc source to an output alternating current (ac) waveform are disclosed. In some disclosed embodiments, an inverter may include a full bridge llc resonant converter, a first boost converter, and a second boost converter.
09/18/14
20140265965

Drive control device and drive control motor


The present invention provides a motor drive control device provided with a shutoff circuit employing semiconductor relays and configured to drive a motor by a duty ratio control of an inverter, which stably drives the motor even in an operation state that drive duty ratio of phases are uneven. In the motor drive control device, output lines of three phases of the inverter circuit are connected to phases of the motor and further connected to a booster circuit, an output boosted by the booster circuit at a time of drive of the motor is distributed to semiconductor relays connected to respective phases of the motor, and furthermore, a switching circuit for stopping actuation of the booster circuit to shut off drive of the motor, is interposed in a line for supplying an electric power to the booster circuit..
09/18/14
20140265959

Motor drive device


The present invention relates to a motor drive device having a drive circuit for driving a power supply relay and a phase relay providing a fail-safe function. The motor drive device includes: an inverter circuit for supplying electric power to an electric motor; a power supply relay provided on a power supply line for supplying electric power from a power supply to the inverter circuit; a phase relay provided on a drive line between the inverter circuit and the electric motor, and constituted by a semiconductor switching element; and a drive circuit connected to the phase relay and the power supply relay.
09/11/14
20140253213

Level shifting circuit with adaptive feedback


An amplifier has a first pull-up path coupled between a voltage supply node and an output node, and a pull-down path coupled between the output node and a ground supply node. A second pull-up path is coupled between the voltage supply node and the output node.
09/11/14
20140252991

Electronic ballasts


Methods and apparatus are described that can provide improved power factor correction and total harmonic distortion, efficiency and/or direct feedback of load current variations to a power source inverter. In one example, a power supply, for example, a ballast, can have an input circuit, an output circuit and an inverter circuit coupled between the input circuit and the output circuit.
09/04/14
20140246984

Ballast with current control circuit


A ballast configured to connect to a set of lamps to energize the set of lamps is provided. The ballast comprises an inverter circuit for generating an oscillating power signal, wherein the oscillating power signal has a frequency, and a resonant tank circuit electrically connected to the inverter circuit for receiving the oscillating power signal and therefrom providing a lamp current to the set of lamps.
08/28/14
20140241021

Inverter control circuit and inverter circuit


An inverter control circuit has a quantizer configured to generate a switching signal which changes over switches of a main circuit converting a dc voltage into an ac voltage, and a filter circuit configured to generate a signal having specific transfer characteristic by using a signal correlated with an output voltage of an lc filter which smooths the ac voltage and an instruction signal corresponding to a target value of an output voltage of the main circuit, wherein the quantizer generates the switching signal by quantizing an output signal of the filter circuit.. .
08/21/14
20140233291

Inverter stack


An inverter stack includes an inverter main body housing an inverter circuit inside, and a fan block disposed on the inverter main body through an engagement device and housing a plurality of fans. The engagement device includes a bolt member penetrating through a slot formed in the inverter main body, wherein a body portion of the bolt member is screwed into a nut fixed to a plate member, and having a stopper nut, and an engagement hole formed in the fan block, the engagement hole having an attachment hole portion and a clamping hole portion formed continuously.
08/21/14
20140233279

Power conversion apparatus


An inverter circuit including a dc capacitor is connected in series to an ac power supply, and at the stage subsequent to the inverter circuit, a smoothing capacitor is connected via a converter circuit. A short-circuit period t for short-circuiting the ac terminals of the converter circuit is provided in one cycle, whereby the converter circuit is controlled, and pwm control is performed for the inverter circuit so as to improve an ac power supply power factor.
08/21/14
20140233220

Electroluminescent pet collars, leashes and personal safety devices


Collar, harness or leash mounted electroluminescent strips are powered by an electronic inverter circuit and batteries inside a plastic housing. A lid on the housing is thinned around a central push button.
08/21/14
20140232309

Power converter


In a power converter, vibration and noise of a motor due to pulsation of a direct current link voltage are reduced. An inverter circuit is provided, which is configured to convert a direct current link voltage having a pulsating component to an alternating current to output the alternating current to a permanent magnet synchronous motor.
08/21/14
20140232286

Electronic ballast


The present invention discloses an electronic ballast for operating a gas discharge lamp which includes (i) a rectifier bridge circuit; (ii) a power factor correction (pfc) network that includes an electrolytic capacitor that charges by means of a circuit comprised by an inductor, diode and capacitor; and (iii) a switched inverter circuit that converts rectified dc voltage to a high frequency current ac voltage. The electronic circuit has a switch that switches on the aforementioned electronic elements making the (pfc) circuit consume energy continuously from the network, while the electrolytic capacitor remains connected to the voltage of the rectifier bridge, through the inductor and the diode, even if the inductor has no energy stored.
08/14/14
20140225663

Buffer circuit and switching controller


A buffer circuit includes a first inverter circuit that inverts an input signal, a second inverter circuit that inverts the output signal of the first inverter circuit, an impedance element connected between the first inverter circuit and the second inverter circuit, a first conductivity type switching element that increases a potential of the output node of the second inverter circuit when the input signal exceeds a first threshold voltage, and a second conductivity type switching element that decreases a potential of the output node of the second inverter circuit when the input signal is lower than a second threshold voltage.. .
08/14/14
20140225648

Pseudo-inverter circuit with multiple independent gate transistors


The invention relates to a a circuit including a transistor of a first type of channel in series with a transistor of a second type of channel between first and second terminals for applying a power supply potential, each of the transistors being a multiple gate transistor having at least a first (g1p, g1n) and a second (g2p, g2n) independent control gates, characterized in that at least one of the transistors is configured for operating in a depletion mode under the action of a second gate signal applied to its second control gate (g2p, g2n).. .
08/14/14
20140225163

Inverter circuit including short circuit protected composite switch


There are disclosed herein various implementations of a short circuit protected composite switch and a circuit including such a switch. In one exemplary implementation, such a short circuit protected composite switch includes a iii-n field-effect transistor (fet) having a drain, a source, and a gate, and a high current group iv fet coupled in series with the iii-n fet and configured to limit a current through the iii-n fet.
08/07/14
20140218991

Semiconductor system


In some aspects of the invention, multiple insulating substrates each mounting thereon at least one each of at least four semiconductor devices that form at least one of three-level electric power inverter circuits and a base plate on the one surface of which a plurality of the insulating plates are arranged are provided. On the one surface of the base plate, at least four regions are established and multiple insulating substrates are arranged to be distributed so that at least one each of the at least four semiconductor devices is arranged in each of the four regions established on the base plate.
08/07/14
20140218980

Electrical generator


An inverter circuit comprises an inverter which can be configurable for controlling the supply of mains current from a grid to an electric machine in a start-up mode whereby the machine drives the prime mover for initialisation. Thereafter the same inverter is reconfigurable as part of the circuit to supply reactive power to the grid when the machine is running as a generator powered by the prime mover..
08/07/14
20140218865

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.. .
07/31/14
20140209586

Portable igbt arc welding machine


A portable igbt (insulated gate bipolar transistor) of high reliability, compact size, and low cost includes a main circuit to which a control circuit and an auxiliary power supply circuit are connected. The main circuit includes, in sequence, an input rectifier filter circuit, an inverter circuit, a high-frequency primary transformer, and a secondary output rectifier circuit.
07/24/14
20140204642

Inverter circuit


An inverter circuit 40 with reduced loss in semiconductor elements when starting up, having switching elements q1 and q2 in series, and connected to both ends of a direct current power source circuit 30 having direct current power sources psp and psn in series, and including an alternating current output terminal u connected to a connection point of the switching elements, an alternating current output terminal v connected to a connection point of the direct current power sources, a bidirectional switch element s1, connected between the alternating current output terminal u and a terminal r of an alternating current power source 1, and a bidirectional switch element s2, connected between the alternating current output terminal u and a terminal s of the alternating current power source, causing the bidirectional switch elements to turn on and off when starting up.. .
07/24/14
20140204636

Current limiting control diode neutral-point-clamped three-level inverter and related circuit


The present disclosure discloses a current limiting control method for a diode neutral-point-clamped three-level inverter and a related circuit. When a current in switching tubes is lowered to a value not greater than a first preset current value, the current limiting control method for a diode neutral-point-clamped three-level inverter and the related circuit drive an inside switching tube of the switching tubes to be turned on; after a first delay time, drive another inside switching tube to be turned on; after a second delay time, control an inside switching tube to be turned off and the other inside switching tube to be normally turned on; and control all the switching tubes to be turned on or off according to a control time sequence of the diode neutral-point-clamped three-level inverter circuit..
07/24/14
20140204564

Display apparatus


A display apparatus includes a display panel, a backlight, a pair of inverter circuit boards that are respectively arranged in vicinities of end portions in a longitudinal direction of a hack side of the display panel, and an expansion slot unit having an expansion slot, a case that includes a slit serving as an opening through which a expansion board to be inserted into the expansion slot is inserted and can guide and house the expansion hoard, and an expansion slot board, the expansion slot unit being arranged on the back side of the display panel to be adjacent to a side of one of the pair of the inverter circuit boards and the slit being provided in an open state at a position separated from the side edge of the display panel by more than a length in an insertion direction of the expansion board that is inserted.. .
07/24/14
20140203845

Semiconductor device


Provided is a semiconductor device exemplified by an inverter circuit and a shift register circuit, which is characterized by a reduced number of transistors. The semiconductor device includes a first transistor, a second transistor, and a capacitor.
07/24/14
20140203774

Charging control device and charging control method


A charging control device includes a chopper circuit, a primary side coil, a primary side inverter circuit, and a control unit. A charged device includes a secondary side coil, and a secondary side rectifier circuit that is configured to be connectable to a storage cell.


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