Abstract: A turn-off overvoltage limiting for IGBT is described herein. The injection of a sample of the overvoltage across the IGBT in the gate drive to slow down the slope of the gate voltage decrease only during the overvoltage above a predetermined value is described herein. Techniques to increase the parasitic inductance to allow the control to limit an overvoltage at turn off of the second IGBT are also described herein.

Abstract: An inverter comprises a first switch coupled to an input of an output filter and a positive dc bus, a second switch coupled to the input of the output filter and a negative dc bus, a first freewheeling apparatus coupled to the first switch, the second switch and ground, a first soft switching network coupled to the first freewheeling apparatus and the first switch, wherein the first soft switching network is configured such that the first switch is of a first zero voltage transition during a turn-on process of the first switch and a second soft switching network coupled to the first freewheeling apparatus and the second switch, wherein the second soft switching network is configured such that the second switch is of a second zero voltage transition during a turn-on process of the second switch.

Abstract: Provided is an efficient inverter driving method. A pulse with very short pulse width is supplied as a primary driving pulse of a transformer, and the secondary output voltage of the transformer caused by a transient phenomenon can be enlarged several times while keeping the power source voltage for input current constant by shortening the time interval of the primary driving pulse.

Abstract: In aspects of the invention, a multilevel conversion circuit can include a configuration for linking capacitors, including diodes, reverse-blocking semiconductor switches, and resistors, and a circuit for clamping the capacitor voltage at a specified voltage. Such a configuration can serve to reduce the number of capacitors that need detection of the voltages thereof and appropriate changing-over operation of semiconductor switches to control the capacitor voltage to a desired value. By way of aspects of the invention, desired voltages can be provided to the capacitors.

Abstract: The present invention relates to a Voltage converter (100) for converting an input voltage (V10) to an output voltage (V20) comprising an input circuitry (102) for receiving the input voltage (V10) from a power supply (112), wherein the input circuitry includes chopper means (110) for chopping a voltage (V12) derived from the input voltage (V10) at a chopper frequency to a chopped voltage (V14), an inductive transformer unit (106) for transforming the chopped voltage (V14) to a chopped AC voltage (V16), and an output circuitry (104) for converting the chopped AC voltage (V16) of the inductive transformer unit (106) to the output voltage (V20) having a lower frequency than the chopper frequency.

Abstract: A multilevel inverter having an efficient structure is provided, the multilevel inverter including a modularized phase-shift transformer including a plurality of modules to provide a phase shifted voltage by receiving a 3-phase input voltage, a plurality of first group unit power cells configured to provide an output voltage of predetermined phase, a plurality of second group unit power cells configured to provide an output voltage of predetermined phase, a plurality of third group unit power cells configured to provide an output voltage of predetermined phase. One of the first group unit power cells, one of the second group unit power cells and one of the third group unit power cells are paired to provide an output voltage of same phase.

Abstract: A static energy supply unit has an energy store connected to an ac supply network by a power converter. A unit controller for the static energy supply unit includes an amplitude controller, a phase controller and a frequency controller. These measure and record characteristics of the supply network and provide output signals indicative of the voltage characteristics for an operating condition of the supply network. A signal generator for generating a simulated output voltage signal for each phase of the supply network is provided. A comparator is used to compare the simulated output voltage signal for each phase and a measured voltage for a corresponding phase of the supply network. The controller controls the operation of the power converter to vary the amount of power that is supplied to the supply network from the energy store based on the comparison of the simulated output voltage signal(s) and the measured voltage(s).

Abstract: A current controller for controlling plural stator currents of plural stator windings of an electrical machine, in particular a generator, is provided, wherein the plural windings are separately connectable to a converter. The current controller includes a positive-sequence current controller configured to provide a first voltage command, in particular in a rotating dq+ frame, based on the plural stator currents; a negative-sequence current controller configured to provide a second voltage command, in particular in the dq+ frame, based on the plural stator currents. Further, the current controller includes a summation system for adding the first voltage command and the second voltage command to obtain a summed voltage command based on which the converter is controllable.

Abstract: A method for controlling a converter including a resonant circuit, where the converter is controlled such that control switches are switched into a first state at the occurrence of an event that is related to a dependent variable of the converter and are switched into a second state at the occurrence of an event that is not related to a dependent variable of the converter. The method may be employed in a converter or an inductive power transfer transmitter.

Abstract: The invention relates to a DC to AC converter circuit. In particular, the invention relates to a half-bridge inverter for converting a DC to an AC voltage. The half-bridge inverter for converting a DC input voltage to provide an AC output voltage at an output terminal, comprising a first switching circuit connected to at least one input terminal and to the output terminal and configured to provide a high or a low voltage level at the output terminal; a second switching circuit connected to the output terminal and configured to provide a connection to an intermediate voltage level, the intermediate voltage level being between the high and the low voltage level; and wherein the second switching circuit is further connected to the at least one input terminal allowing the second switching circuit to provide the high or the low voltage level at the output terminal.

Abstract: A drive device driving a power converter that includes a switching element formed from a wide bandgap semiconductor, includes a PWM-signal output unit that generates a drive signal that drives the switching element with PWM; an on-speed reducing unit that, when the switching element is changed from off to on, reduces a change rate of the drive signal; and an off-speed improving unit that, when the switching element is changed from on to off, draws charge from the switching element at a high speed and with a charge drawing performance higher than that at a time when the switching element is changed from off to on.

Abstract: There is provided a gate driving device, including: an inverter arm including a high-side switch and a low-side switch; a gate driving unit receiving an instruction signal to provide switching control to the inverter arm, outputting a control signal to control switching of the inverter arm, and including a plurality of gate drivers; and a balancing unit causing voltage applied to the plurality of gate drivers to be divided to be supplied to respective gate drivers among the plurality of gate drivers, according to the switching of the inverter arm based on the control signal.

Abstract: An inverter device includes; a switching element; a plurality of flyback diodes each connected in parallel with the switching element; a first conductor plate connected to anode terminals of the flyback diodes and to one side of the switching element; and a second conductor plate connected to cathode terminals of the flyback diodes and to the other side of the switching element. Each of the flyback diodes is formed in a polygonal shape, and the two flyback diodes in each pair of the flyback diodes that are arranged in mutually adjacent positions are arranged so that a vertex of one opposes a vertex of the other.

Abstract: An inductive component (1a . . . 1e) with at least two coils (2 . . . 4b) in a closed main magnetic circuit (5a . . . 5j) for guiding a magnetic main flux (?H) penetrating all coils (2 . . . 4b) is specified. The inductive component furthermore comprises a leakage field guide component (6a . . . 8c) or a plurality of leakage field guide components (6a . . . 8c), wherein a leakage field guide component (6a . . . 8c) is arranged between two coils (2 . . . 4b) in each case, separated by two air gaps (E . . . J) from the main magnetic circuit and intended for guiding a magnetic leakage flux ?S different from the main flux ?H. The main magnetic circuit (5a . . . 5j) and/or the leakage field guide components (6a . . . 8c) consist of a magnetically isotropic material. Furthermore, the invention relates to a use of a choke (1a . . . 1e) with leakage field guide component (6a . . . 8c) for guiding a leakage flux (?S) arising in the choke (1a . . . 1e) as a PFC (Power Factor Correction) choke.

Abstract: A power conversion device (1) of the present invention includes a power module (4) for converting direct current electricity to alternating current electricity, first and second power supply buses (5, 6) connecting input terminals (12, 13) and the power module (4), and a metal casing (7) for housing the first and second power supply buses (5, 6) and the power module (4). The capacitive coupling between the first power supply bus (5) and the metal casing (7) and the capacitive coupling between the second power supply bus (6) and the metal casing (7) are substantially matched. Thus, radiation noise is reduced by reducing the propagation of switching noise to the metal casing.

Abstract: The invention relates to a differential mode and common mode choke comprising: a ferromagnetic core comprising three branches (1, 2, 3) extending between a bottom part (5) and a top part (4), a first coil (b1) wound around the first lateral branch (1), a second coil (b3) wound around the second lateral branch (3), the first lateral branch (1) being separated from the top part (4) by a first air gap (e1) and from the bottom part (5) by a second air gap (e10), the second lateral branch (3) being separated from the top part (4) by a first air gap (e3) and from the bottom part (5) by a second air gap (e30), the central branch (2) being separated from the top part (4) by a first air gap (e2) and from the bottom part (5) by a second air gap (e20).

Abstract: An analog controller is disclosed. The controller has a maximum power point tracking unit and a power factor adjusting unit. The maximum power point tracking unit generates a maximum power tracking voltage which is used to control the magnitude of the output current of the inverter so as to extract the most available power from the power generating device. The power factor adjusting unit, which generates a ramp control voltage that will further determine the duty ratio and switching frequency of PWM signal, gracefully tunes the magnitude and reduces the total harmonic distortion of the current injected from inverter into utility grid.

Abstract: A voltage converter system includes a first DC-AC voltage converter that converts a first DC voltage signal to a first AC voltage signal. A DC link converts the first AC voltage signal to a second DC voltage signal. A second DC-AC voltage converter converts the second DC voltage signal to a second AC voltage signal. In another configuration a DC-AC voltage converter converts a DC voltage signal to a first AC voltage signal. An AC-AC voltage converter converts the first AC voltage signal to a second, lower-frequency AC voltage signal. In yet another configuration a first voltage converter portion converts a DC voltage signal to pulses of DC voltage. A second voltage converter portion converts the pulses of DC voltage to a relatively low-frequency AC voltage signal. The voltage converter system is selectably configurable as a DC-AC voltage converter or an AC-DC voltage converter.

Abstract: An inverter includes transformers having identical characteristics. Exciting windings of the transformers are connected in parallel so that the transformers are excited simultaneously. Output windings of the transformers are connected in series so that waveforms of output voltages of the output windings are time-synchronized. Each transformer includes a core having an identical shape and including an inner leg having an independent closed magnetic circuit. The excitation winding and the output winding are wrapped around the inner leg of the core in layers. The inner leg of the core has a gap whose size is steplessly adjustable in a state where the excitation current is applied to the excitation winding. The size of the gap is adjusted to regulate exciting inductances of the transformers to a same predetermined value.

Abstract: A multi-level inverter having at least two banks, each bank containing a plurality of low voltage MOSFET transistors. A processor configured to switch the plurality of low voltage MOSFET transistors in each bank to switch at multiple times during each cycle.

Abstract: An improved interface for renewable energy systems is disclosed for interconnecting a plurality of power sources such as photovoltaic solar panels, windmills, standby generators and the like. The improved interface for renewable energy systems includes a multi-channel micro-inverter having novel heat dissipation, novel mountings, electronic redundancy and remote communication systems. The improved interface for renewable energy systems is capable of automatic switching between a grid-tied operation, an off grid operation or an emergency power operation.

Abstract: A voltage booster allowing for increased utilization of low voltage, high current, unregulated DC power (“LVDC source”), such as, but not limited to, fuel cells, batteries, solar cells, wind turbines, and hydro-turbines. LVDC generation systems employing a variable low voltage DC-DC converter of the present disclosure may be used without a power inverter in applications requiring high voltage DC inputs and can also allow for the employment of common, low cost, reliable, low voltage energy storage chemistries (operating in the 12-48 VDC range) while continuing to employ the use of traditional inverters designed for high voltage power supplies. An embodiment of the DC boost converter includes a plurality of interleaved, isolated, full-bridge DC-DC converters arranged in a Delta-Wye configuration and a multi-leg bridge.

Abstract: An inverter switches input voltage Vin to flow an excitation current to excitation winding Np of a transformer and output to a discharger an alternating voltage Vout from the output winding Ns. In an output circuit flowing a current to the discharger, a voltage-responsive connector is connected in series with the winding Ns to interrupt or connect the output circuit according to a voltage applied to between opposed electrodes. The voltage-responsive connector has characteristics of keeping the electrodes in an insulated state until an instantaneous value of the alternating voltage reaches a predetermined value, and holding the electrodes in a conduction state while the instantaneous value of the alternating voltage has reached the predetermined value and continues to exceed the predetermined value, and quickly returning the electrodes to the insulated state when the instantaneous value of the alternating voltage has fallen below the predetermined value.

Abstract: An inverter device, a motor driving device, a refrigerating air conditioner, and a power generation system, which can reduce the recovery loss thereof, are obtained. A plurality of arms that can conduct and block current are provided. At least one of the plurality of arms includes: a plurality of switching elements each having a parasitic diode and being connected in series with each other; and a reverse current diode connected in parallel with the plurality of switching elements.

Abstract: The present techniques include methods and systems for operating converter to maintain a lifespan of the converter. In some embodiments, the operating frequency of the converter may be increased such that stress may be reduced on the bond wires of the converter. More specifically, embodiments involve calculating the aging parameters for certain operating conditions of the converter operating in a maximum power point tracking (MPPT) mode and determining whether the MPPT operation results in aging the converter to a point which reduces the converter lifespan below a desired lifespan. If the MPPT operation reduces the converter lifespan below the desired lifespan, the frequency of the converter may be increased such that the converter may be controlled to operate at a percentage of MPPT. Thus, in some embodiments, power output may be optimized with respect to maintaining a desired lifespan of the converter.

Abstract: The invention relates to a device and to a method for monitoring a decentralized power generation plant for feeding into a three-phase network in order to prevent undesired island network operation, wherein the power generation plant has an inverter, which produces three alternating currents phase-shifted from each other from an input-side direct voltage, in particular of a photovoltaic generator, which alternating currents are fed into the network. The basis of the monitoring method is that the target power value for a designated phase of the network alternating voltage is changed, e.g. reduced, by a predetermined first amount for a predetermined time period while the target power values for the other two phases are changed in the opposite direction, e.g. increased, by a predetermined second and/or third amount. The sum of the second and third amounts equals the first amount.

Abstract: An inexpensive and space-saving power conversion device is provided which can eliminate a high-cost and large reactor like a buffer reactor. A device includes multiple switching elements 21u, 21x performing conversion between DC and AC upon switching, a unitary unit C including the switching elements 21u, 21x, and a capacitor 30, and unit arms 10P, 10N each including at least one unitary unit C. The primary side of a transformer 40 is connected between the pair of unit arms 10P, 10N so as to suppress a short-circuit current by a leakage inductance component.

Abstract: An intrinsic piezoelectric transformer circuit a piezoelectric transformer circuit is provided that has a primary side component including first and second electrodes, a secondary side component including first and second electrodes, and at least one tertiary component including first and second electrodes. A power bridge is provided which includes one or more switches, each switch has a gate terminal that is directly connected to the second electrode of the tertiary component of the piezoelectric transformer. The first electrode of the tertiary component of the piezoelectric transformer is connected to a reference for the one or more switches of the power bridge. The first electrode of the primary component of the piezoelectric transformer is electrically connected to a power bridge output and the second electrode of the primary component of the piezoelectric transformer is connected to a ground terminal.

Abstract: A multiple inverter with neutral line inductor and an active power filter system are disclosed. In the disclosure, the multiple inverter comprises at least two inverter units connected in parallel, the midpoint of the direct current bus in each inverter unit is connected to the neutral line N through the respective neutral line inductor. The multiple inverter can suppress the ripple produced by the neutral line current without increasing the direct current bus capacitor.

Abstract: A power converter may include a first power path having no energy storage and a second power path having substantial energy storage. The first and second power paths have first and second input waveforms that are complementary with respect to a source waveform. The first power path, which may be more efficient than the second path, may transfer as much power as possible from the input to the output. The energy storage enables the second power path to make up the difference between the power available from the source and the power drawn by the first power path, and to make up the difference between the power demanded by a load and the power supplied by the first path.

Abstract: The present invention relates to a switch controller and a converter including the same. The switch controller generates an oscillating voltage determining a switching frequency alternately switching a high-side switch and a low-side switch, senses a power source voltage supplied to the switch controller, and maintains the high-side switch and the low-side switch in the turn-off state in a case that the change of the power source voltage is not generated after one of the high-side switch and the low-side switch is turned off according to the oscillating voltage.

Abstract: 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.

Abstract: Exemplary embodiments are directed to methods and systems for producing a three-phase current to a three-phase output. Switching converters are used to generate a positive current, a negative current, and an intermediate current. The system is configured such that the produced positive current follows a path of a highest phase of a sinusoidal three-phase signal at a given time, the produced negative current follows a path of a lowest phase of the three-phase signal at the given time, and the produced intermediate current follows a path of a phase of the three-phase signal between the highest and the lowest phase at the given time. The produced currents are switched to each phase conductor of the three-phase output in sequence so that phase currents of the three-phase current are formed in the output conductors.

Abstract: A DC/DC converter includes two input terminals for a DC input voltage, two output terminals for a DC output voltage, an inverter converting a DC voltage into an AC voltage, and a rectifier converting an AC voltage from the inverter into a DC voltage between a first one of the input terminals and a first one of the output terminals. At least one galvanically isolating element is arranged between the output of the inverter and the input of the rectifier, and a capacitance is coupled between the output terminals. The inverter converts a partial DC voltage, being smaller than the full DC input voltage, across a capacitance between the second one of the input terminals and the second one of the output terminals.

Abstract: A DC to DC converter system, includes inverter circuitry having a first and a second switch, the inverter circuitry further configured to generate a first and a second gate control signal, the signals configured to open and close the first and second switch, respectively, and generate an AC signal from a DC input signal. The system further includes transformer circuitry configured to transform the AC signal into a sinusoidal AC signal, second stage circuitry configured to rectify the sinusoidal AC signal to a DC output signal, and hybrid control circuitry configured to modulate the first and second gate control signals, wherein the modulation comprises pulse frequency modulation (PFM) and pulse width modulation (PWM).

Abstract: The present invention provides optimized driving of an inverter device. The inverter of such an inverter device may alternatively be driven in two-level operation or in three-level operation. Through a suitable selection of the driving method, the semiconductor losses in the inverter may be minimized and the thermal loading of the components used may be controlled in a targeted manner. Using the provided operating method for an inverter, more efficient and more protective inverter operation is possible, even at low output voltages and highly inductive or capacitive loading.

Abstract: A method of performing space vector modulation for PWM control for creating AC waveforms includes generating and sampling a reference signal to generate reference samples and performing a reference vector approximation to synthesize a reference vector associated with at least one of the reference samples. The reference vector approximation employs active vectors, one or more zero vectors, and one or more pseudo zero vectors in the formation thereof. Another method of performing space vector modulation (SVM) includes generating a reference signal and sampling the reference signal at a sampling frequency to generate a plurality of reference samples. The method also includes performing a reference vector approximation to synthesize a reference vector associated with at least one of the reference samples, wherein the reference vector approximation has a first portion that employs two adjacent active vectors and a remaining portion that employs two non-adjacent active vectors in the formation thereof.

Abstract: A power converter includes pairs of series-connected switching elements and, for each pair, a bidirectional switch that clamps the switching elements of the pair at the mid-point of a DC voltage that is supplied to the power converter. An abnormal voltage rise in a forward recovery process of the bidirectional switch is avoided by restraining an induced electromotive force developing across the bidirectional switch upon turning OFF of one of the semiconductor switching elements below the difference in voltage between the gate voltage at the start of the forward recovery process of the bidirectional switch and the gate threshold voltage that allows the maximum recovery current of the bidirectional switch to flow.

Abstract: A switching power supply device equipped with an inverter device includes a transformer including a primary winding and a secondary winding, which are magnetically coupled with each other. On the primary side, a capacitor and a switching element are connected in series with the primary winding and a switching element is connected in series the switching element and is connected in parallel with the primary winding and the capacitor. On the secondary side, a bidirectional switching element, which includes FETs, is connected in series with the secondary winding. A control circuit alternately turns the first switching element and the second switching element on, and turns the bidirectional switching element on in an off period of the first switching element or the second switching element. Thus, the inverter device outputs an alternating current output voltage by using a single secondary winding of a transformer.

Abstract: A converter includes at least device(s) for sensing the currents fed to the electric motor powered by the converter, the device(s) for current detection being arranged inside the converter, and the signals of the device(s) being fed to a nonlinear filter, whose output signals are fed to an additional filter that is connected to an analog-to-digital converter.

Abstract: 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. This can make the semiconductor devices arranged to be distributed so that heat generating sections determined according to the operation mode of the semiconductor system comes to be partial to disperse generated heat, by which a semiconductor system is provided which can enhance heat dispersion efficiency.

Abstract: A system for converting a first electric voltage into a second electric voltage, comprising: at least two input terminals and two output terminals; and switching members disposed between the terminals, which can convert the first voltage into the second voltage. At least one switching member comprises at least two arms connected in parallel and each arm includes an electronic switch that can be controlled such as to occupy either an on-state or an off-state, said switch comprising a control electrode and two conduction electrodes that conduct current in the on-state. The switching member comprises a common control terminal connected to the control electrode of the switch of each arm, as well as a first common conduction terminal and a second common conduction terminal connected respectively to a first conduction electrode and a second conduction electrode of the switch of each of the arms.

Abstract: An AlGaN/GaN-HEMT has a structure including: compound semiconductor layers formed on a substrate; a gate electrode, a gate pad that has a current path formed between the gate electrode and itself, and a semiconductor layer that is spontaneously polarized and piezoelectrically polarized, which are formed on the compound semiconductor layer; and a gate electrode connection layer formed on the semiconductor layer, wherein the gate electrode connection layer and the gate electrode are electrically connected with each other. This structure which is relatively simple allows the AlGaN/GaN-HEMT to realize an intended normally-off operation without causing such inconveniences as increase in a sheet resistance, increase in an on-resistance, and increase in a leakage current.

Abstract: An apparatus and system for power conversion. In one embodiment, the apparatus comprises a transformer having a primary winding and a plurality of secondary windings comprising a first secondary winding, a second secondary winding, and a third secondary winding, the first, the second, and the third secondary windings wound in a tri-filar configuration; and a cyclo-converter comprising a plurality of switch pairs for converting an alternating current to an AC current, each switch pair in the plurality of switch pairs coupled between two lines of an AC output and having a different secondary winding of the plurality of secondary windings coupled between its switches, the plurality of switch pairs comprising a first switch pair, a second switch pair, and a third switch pair, wherein the first, the second, and the third secondary windings are coupled between drain terminals of the first, the second, and the third switch pair, respectively.

Abstract: A micro inverter includes a synchronous bi-directional power converter and a controller communicatively coupled to the synchronous bi-directional power converter. The controller is configured to operate the micro inverter in a forward conduction mode when photovoltaic (PV) power is available and operate the micro inverter in at least one of a reverse conduction mode and a reactive power compensation mode when PV power is unavailable.

Abstract: A pair of elements that includes a Si-MOSFET and a Si-FWD connected in inverse parallel and operates as a positive side arm of an electric-power conversion apparatus and a pair of elements that operates as a negative side arm of the electric-power conversion apparatus are provided, where the first and second pairs of elements are accommodated in one power semiconductor module to compose a 2-in-1 module, and terminals are included which enables series connection of the pairs of elements.

Abstract: 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.

Abstract: A close control of electric power converters includes a diode D1 in parallel with a switch I1; a diode D2 in parallel with a switch I2; a transformer (T1). The switches (I1, I2) are controlled, cyclically repeating the following stages: at a time T0 the switch I1 is switched on; at a time T1 the switch I1 is switched off; the switch I2 is switched on before the current passing through the diode D2 reaches zero; at a time T3 the switch I2 is switched off; and at a time T4, when the diode D1 becomes conductive, the first stage is returned to. In particular, the close control of electric power converters relates to electrically isolated electric power supplies working at high frequency with high efficiency and a high level of integration.

Abstract: A converter includes a first converter module and a second converter module coupled to the first converter module in a nested manner. Each of the first converter module and the second converter module includes a plurality of switch units. When the converter is operated to perform power conversion, at least two of the plurality of switch units is configured to be switched both in a complementary pattern and a non-complementary pattern.

Abstract: In the present invention, a power conversion device is provided with an inverter for converting power output from a power source; a first power supply bus, connected to the positive electrode side of the inverter and the power source; a second power supply bus, connected to the negative electrode sides of the inverter and the power source; a first conductor that forms, along with the first power supply bus, a capacitor; a second conductor that forms, along with the second power supply bus, a capacitor; and a connection circuit, comprising a resistor, that electrically connects the first conductor and the second conductor.