Abstract: A rectification and boost-buck control system for alternating current, includes a processor, a commutation detection circuit, a chopper circuit and a switch circuit. The chopper circuit includes upper bridge elements connected to corresponding phases of the alternating current. The switch circuit includes lower bridge elements connected to the upper bridge elements. The commutation detection circuit is configured to detect commutation signals. Based on the communication signals and current output current and/or current rectified voltage, the processor is capable of outputting a conduction angle control signal to the chopper circuit and output a switch control signal to the switch circuit to adjust on-off time of the chopper circuit and the switch circuit to thereby adjust the current output current and/or the current rectified voltage.

Abstract: The disclosure relates to a power electronics device having at least two inverters and a transformer apparatus having a core arrangement, at least one primary winding and at least one secondary winding that wind around the core arrangement at least in sections.

Abstract: A solar power generation system provides safety for personnel working on or around the system. The solar power generation system includes multiple solar panels, multiple cut-off devices separate from the plurality of solar panels and a master control unit. The cut-off devices are coupled in series with corresponding sub-groups of the plurality of solar panels and connect and disconnect outputs of the corresponding sub-groups from a solar power output chain or bus. The master control unit has at least one power supply output coupled to the plurality of cut-off devices, and a power supply input that receives a power source independent of an output of the plurality of solar panels. The cut-off devices are deactivated to open-circuit a connection of the corresponding sub-group when the power source is removed from the power supply input.

Abstract: Method for measuring an operating temperature of a power module (10) that is used for operating an electric vehicle drive, the power module (10) comprising a plurality of semiconductor switching elements (14) and drive electronics (16), wherein the semiconductor switching elements (14) can be switched by the drive electronics (16) in such a way that the semiconductor switching elements (14) allow or interrupt a drain-source current in order to convert the direct current fed into the power module (10) at the input side into an output-side alternating current, wherein the method comprises measurement of a voltage present at a point located on a side of a diode (22) that is connected in series with the semiconductor switching element (14) and that faces away from the semiconductor switching element (14), wherein the method comprises measurement of a drain-source current of the semiconductor switching element (14) that is generated by a current source (18), wherein the method comprises determination of a mathemat

Abstract: A distributed-power-supply power conversion system includes a plurality of power inverters configured to invert DC power to AC power; and a control device configured to select at least one power inverter from the plurality of power inverters as a power inverter used for testing, and configured to perform an energization test of the power inverter used for testing in a state where an AC side of the power inverter used for testing is disconnected from a system, and is connected to an AC power supply device and to a load bank, and a voltage on the AC side of the power inverter used for testing is established. The distributed-power-supply power conversion system can perform an energization test of a power inverter before a system receives power.

Abstract: A matrix power conversion device including a plurality of three-phase switching modules and a controller is provided. Each three-phase switching module includes a plurality of bidirectional switches connected to the input phase voltages of the three-phase input power respectively and outputs a corresponding output phase voltage of the three-phase output power. The controller determines a maximum voltage, an intermediate voltage and a minimum voltage among all the input phase voltages to acquire a waveform of a control carrier wave in a switching cycle. The controller acquires output expected values corresponding to all output phase voltages and compares them with the waveform of the control carrier wave for acquiring a turning-on time of each of the plurality of bidirectional switches. Accordingly, the controller controls the matrix power conversion device to switch the three-phase input power so as to change the three-phase output power for driving the motor.

Abstract: A method for controlling a power module includes: configuring N cells in cascade connection, where N is a positive integer equal to or greater than 2, each cell comprising a bidirectional switching unit and a non-controlled rectifier bridge, the bidirectional switching unit being connected to central points of two bridge arms of the non-controlled rectifier bridge; controlling each cell to operate in one of three operating modes of a modulation mode, a bypass mode and a non-controlled rectifying mode, wherein in the N cells, m1 cells operate in the bypass mode, where 0?m1?M1, m2 cells operate in the non-controlled rectifying mode, where 0?m2?M2, m3 cells operate in the modulation mode and can realize power factor correction, where 0<m3; wherein m1+m2+m3=N, M1 is the allowable number of cells for bypass in the system, and M2 is the allowable number of cells for non-controlled rectification in the system.

Abstract: A power supply control circuit of a three-phase brushless DC (BLDC) motor is provided. The control circuit includes means for calculating the DC current consumption IS based on a phase current signal Ishunt of the BLDC motor, the means including a shunt resistor Rshunt, an amplifier and a low pass filter. The amplifier is configured to amplify a measured voltage Vshunt that corresponds to the current Ishunt across the resistor Rshunt and perform an offset correction. The low pass filter is configured to provide a filtered voltage VO of the voltage Vshunt. The DC current IS is calculated based on the voltage VO.

Abstract: A secondary power system is configured to connect to a motor vehicle having a powertrain comprising an engine and a first alternator. The secondary power system includes a second alternator connected to the engine, one or more electro-chemical storage devices coupled to the second alternator and configured to be charged by the alternator, and one or more inverter chargers. The inverter chargers may operate in a first mode to provide AC power to loads on the vehicle or in a second mode to receive alternative power and charge the storage devices. In an embodiment, the secondary power system includes multiple storage devices each comprising at least one electro-chemical storage pack and a logic. The storage devices are interconnected by a junction box. The logics within each storage device may selectively disrupt power flow from the junction box upon detection of an error condition.

Abstract: According to one aspect, an apparatus comprising a two stage DC-DC converter is provided. The converter consists of a multilevel DC-DC converter stage cascaded with a fixed voltage ratio DC-DC converter stage. The converter is controlled so that a first stage of the converter provides an optimized output (a regulated bus voltage) which serves as the input to the second stage. The multilevel DC-DC converter may be the first stage and the fixed voltage ratio, unregulated DC-DC converter may be the second stage converter. Alternatively, the fixed voltage ratio, unregulated DC-DC converter may be the first stage and the multilevel DC-DC converter may be the second stage.

Abstract: A power converting apparatus includes: a bridge circuit that includes at least two legs each including switching elements connected in series, and converts an alternating-current voltage output from an alternating-current power supply into a direct-current voltage; a power-supply current detecting unit that detects a current from the alternating-current power supply; a zero crossing detecting unit that detects a voltage polarity of the alternating-current power supply; and a control unit that controls ON and OFF of the switching elements depending on outputs of the power-supply current detecting unit and the zero crossing detecting unit, in which a dead time that is set for switching and includes a change in the voltage polarity of the alternating-current power supply is longer than a dead time that is set for switching and does not include a change in the polarity.

Abstract: An electrical converter includes a main converter for generating a first output voltage and a converter cell for converting the first output voltage into a second output voltage. A method for operating an electrical converter includes: receiving a reference voltage for the electrical converter; pulse width modulating the reference voltage with a first modulation frequency for generating a first switching signal for the main converter; switching the main converter with the first switching signal to generate the first output voltage; estimating the first output voltage from the first switching signal; determining a voltage error by subtracting the estimated first output voltage from the reference voltage; pulse width modulating the voltage error with a second modulation frequency, which is higher than the first modulation frequency, for generating a further switching signal for the converter cell; and switching the converter cell with the further switching signal to generate the second output voltage.

Abstract: A bi-directional AC/DC converter is provided including a DC-power connection configured to be coupled to a DC-power source, an AC-power connection configured to be coupled to at least one of an AC-power source or a load, a multiplexer having a plurality of multiplexer switches, at least one interleaved bridge circuit having a plurality of bridge switches coupled to the multiplexer, and a positive DC node and a negative DC node coupled to the plurality of multiplexer switches, wherein the plurality of bridge switches includes at least two bridge switches coupled between the AC-power connection and at least one of the positive DC node or the negative DC node.

Abstract: The present application discloses a laser emitting circuit and a LiDAR. In a one-driving-multiple emitting circuit, in an energy storage stage, a power supply stores energy for an energy storage element of the energy storage circuit, and a laser diode does not emit light. In an energy transfer stage, by setting a floating-ground diode D0, an energy charging current passes through an energy storage capacitor C2, the floating-ground diode D0 and the ground to form a loop. In an energy release stage, when the energy release switch element is in an off state, the energy release circuit where the energy release switch element is located is not the lowest impedance loop. A laser diode in the energy release circuit where the energy release switch element is located does not emit light.

Abstract: A method, apparatus, system and computer program is provided for controlling an electric power system, including implementation of a voltage control and conservation (VCC) system used to optimally control the independent voltage and capacitor banks using a linear optimization methodology to minimize the losses in the EEDCS and the EUS. An energy validation process system (EVP) is provided which is used to document the savings of the VCC and an EPP is used to optimize improvements to the EEDCS for continuously improving the energy losses in the EEDS. The EVP system measures the improvement in the EEDS a result of operating the VCC system in the “ON” state determining the level of energy conservation achieved by the VCC system. In addition the VCC system monitors pattern recognition events and compares them to the report-by-exception data to detect HVL events.

Abstract: Disclosed is a current source inverter that includes a combination of normally-on and normally-off switches configured to provide free-wheeling paths for current in case of loss of control signals or gate drive power.

Abstract: An apparatus includes a mechanical switch and a solid-state switch, such as a diamond switch or antiparallel-connected thyristor pair, coupled in series between an AC source and the load, such as a substation input transformer. The control circuit may be configured to connect the AC power source to the load by closing the mechanical switch and turning on the solid-state switch thereafter. The control circuit may be configured to interrupt a connection of the AC source to the load by turning off the solid-state switch and closing the mechanical switch thereafter. Operations of the switches may be coordinated with a fuse coupled in series with the solid-state switch to address different types of fault conditions.

Abstract: An electric power supply is disclosed having high-voltage, direct-current (HVDC) circuitry comprising one or more DC pre-charge capacitors and one or more power transistor switches, the HVDC circuitry configured to receive high-voltage, direct-current (HVDC) input power of about 320 volts and/or greater and convert the HVDC input power to multi-phase, high-voltage, alternating-current (HVAC) output power of about 320 volts and/or greater; and low-voltage, direct current (LVDC) circuitry adapted and configured to operate on low-voltage, direct-current, wherein the LVDC circuitry is configured to control and monitor the multi-phase HVAC output power. The electric power supply is further configured to operate in reverse and convert received multiphase HVAC input power to HVDC output power.

Abstract: A method for treating wastewater having one or more of suspended solids, dissolved solids, biological oxygen demand includes solids filtration followed by a bi-polar/bi-directional flow through ionic module fitted with anionically/cationically charged plates followed by a sub-sonic resonance module followed by another bi-polar/bi-directional flow through ionic module followed by a ultra-sonic resonance module followed by one or more anion/cation collection membrane modules. Recycle is provided in each step, wherein each step may be repeated, and wherein one or more of the steps can be bypassed.

Abstract: A power converting apparatus includes a diode bridge that converts first AC power supplied from a power supply into DC power, a main circuit capacitor that smooths the DC power, one or more capacitors that reduces a noise component included in the first AC power, and a path switch. The path switch switches a charging path for the main circuit capacitor so that current output from the AC power supply flows into the main circuit capacitor via the capacitor(s) from when supply of the first AC power starts until a voltage of the main circuit capacitor reaches a predetermined voltage, and that the current output from the AC power supply flows into the main circuit capacitor without bypassing the capacitor(s) after the voltage of the main circuit capacitor reaches the predetermined voltage.

Abstract: In brief, the invention relates in particular to a converter (100) comprising a plurality of rectifier arms (110), making it possible in particular to rectify AC electrical signals available on the electrical phases (U, V, W) of an electrical grid. To balance the electrical signals coming from the electrical phases (U, V, W) of the electrical grid, and to limit a modulation amplitude of the DC signal generated by the converter (100) between its output terminals (S1, S2), the converter (100) also comprises a correction arm (120) that determines an amplitude of electric current flowing in a neutral (N) of the electrical grid and that generates an opposing electric current of equal or if not close amplitude. The invention also relates to a two-way charger (10) comprising such a converter (100) and one or more active double bridges (200), such that an output (S3, S4) of the active double bridges (200) is electrically isolated from the converter (100).

Abstract: A method for monitoring DC link capacitor health includes receiving a plurality of DC link capacitor state variables and determining whether each of the DC link capacitor state variables are less than a threshold value. In response to the DC link capacitor state variable being less than the threshold value, a deviation of each of the DC link capacitor state variables from the threshold value is calculated. The method further includes determining whether each of the deviations of the DC link capacitor state variables occurred within a threshold time. The method further includes calculating a probability of failure of a DC link capacitor. The probability of failure is used to estimate a remaining lifespan of the DC link capacitor.

Abstract: A reactor includes a plurality of windings, a coupling core, and an inductor core. A coupling core configured to form a coupling closed magnetic circuit that magnetically couples the plurality of windings, the plurality of windings being wound around the coupling core; and. An inductor core, which includes a main part, a first projection part projecting from one end of the main part, and a second projection part projecting from another end of the main part, and each of the first projection part and the second projection part is magnetically connected to the coupling core. The inductor core forms an inductor closed magnetic circuit together with a part of the coupling core around which one winding of the plurality of windings is wound.

Abstract: The present disclosure relates to a motor control device and method. The motor control device includes an inverter for driving a motor, a first shunt resistor connected to a first low-side switching element included in the inverter, a second shunt resistor connected to a second low-side switching element included in the inverter, a DC-link shunt resistor in series with the inverter, and a controller for controlling the inverter based on first current value measured through the first and second shunt resistors and a second current value measured through the DC-link shunt resistor.

Abstract: A motor control system includes a VFD unit comprising a rectifier circuit having a plurality of phase legs each including thereon an upper switching unit and a lower switching unit, an inverter connected to the rectifier circuit by way of a DC link and having a plurality of switches therein controllable to provide a three-phase AC output power to a load, and a bypass relay unit comprising a bypass relay coupled to each of the phase legs of the rectifier circuit downstream from the lower switching unit. An isolation contactor unit is positioned between the inverter and the load and operable to selectively connect/disconnect the inverter to/from the load. The bypass relay unit is operable in a first and second positions to couple the rectifier circuit to the inverter and to couple the rectifier circuit to a bypass path that bypasses the inverter.

Abstract: A method for protecting data in a storage system is disclosed. In one embodiment, such a method includes detecting, by a first hardware management console, first battery-on status associated with a first uninterruptible power supply. The method further detects, by a second hardware management console, second battery-on status associated with a second uninterruptible power supply. The method communicates, from the first hardware management console to the second hardware management console, the first battery-on status. The method then triggers, by the second hardware management console, a dump of modified data from memory to more persistent storage upon detecting both the first battery-on status and the second battery-on status. A corresponding system and computer program product are also disclosed.

Abstract: A gateway system for a building comprises: a first relay to couple a first line of the gateway system to a first grid line of a power grid; a second relay to couple a second line of the gateway system to a second grid line of the power grid; a neutral line coupled to a neutral grid line of the power grid; a first electric-vehicle (EV) line coupled to the first line of the gateway system, the first EV line configured for being coupled to a first line of an EV charging connector; a second EV line coupled to the second line of the gateway system, the second EV line configured for being coupled to a second line of the EV charging connector, wherein the EV charging connector has no neutral line; and a balancing converter coupled to the first and second lines of the gateway system.

Abstract: A semiconductor module arrangement includes a housing and at least one pair of semiconductor substrates arranged inside the housing. Each pair of semiconductor substrates includes first and second semiconductor substrates. The first semiconductor substrate includes a first dielectric insulation layer arranged between a first metallization layer and a third metallization layer, and a second dielectric insulation layer arranged between the third metallization layer and a second metallization layer. The second semiconductor substrate includes a first dielectric insulation layer arranged between a first metallization layer and a third metallization layer, and a second dielectric insulation layer arranged between the third metallization layer and a second metallization layer.

Abstract: A power apparatus applied in a solid state transformer structure includes an AC-to-DC conversion unit, a first DC bus, and a plurality of bi-directional DC conversion units. First sides of the bi-directional DC conversion units are coupled to the first DC bus. Second sides of the bi-directional DC conversion units are configured to form at least one second DC bus, and the number of the at least one second DC bus is a bus number. The bi-directional DC conversion units receive a bus voltage of the first DC bus and convert the bus voltage into at least one DC voltage, or the bi-directional DC conversion units receive at least one external DC voltage and convert the at least one external DC voltage into the bus voltage.

Abstract: The invention relates to a method and to a device for operating a bidirectional voltage transformer connectable to a primary battery and having a primary-side smoothing capacitor, an inductive transformer, and a secondary-side clamping capacitor, wherein, before the primary battery is connected, a voltage at the primary-side smoothing capacitor is matched to a voltage of the primary battery by a cyclical transfer of charge from the secondary-side clamping capacitor. The voltage of the primary-side smoothing capacitor is matchable in this way to the voltage of the primary battery before the primary battery is connected, and current spikes thus avoided during connection of the primary battery.

Abstract: An apparatus having an AC rectifier configured to generate one or more rectified signals from an alternating current (AC) signal, bus having a positive line and a negative line, parallel converter connected between the positive line and the negative line, and bulk capacitor coupled to the parallel converter. The bus is connected to the AC rectifier to receive a first of the rectified signals between the positive line and the negative line. The apparatus has a controller configured to operate the parallel converter in a first mode in which energy from a second of the rectified signals from the AC rectifier is stored in the bulk capacitor and a second mode in which the energy stored in the bulk capacitor is discharged to the bus to increase a voltage on the bus during at least an initial portion of the second mode.

Abstract: The invention provides a series resonant LLC power converter unit to provide a plurality of power outputs. The power converter unit comprises a plurality of transformers arranged such that at least one primary winding of each transformer is connected in parallel and configured to provide a power output. An inductive element is positioned in parallel with at least one primary winding selected from said plurality of transformers, wherein the inductive element restricts variation in inductance for said plurality of transformers and power outputs in operation.

Abstract: A charging system including an accumulator, a use of an MPP tracking method for charging an accumulator, and a method for charging an accumulator with the aid of a charging system, the charging system including a voltage source, a converter, and a rectifier, the current supplied and/or driven by the voltage source being supplied to the DC-voltage-side terminal of a converter, the converter having semiconductor switches, which are controllable in a pulse-width modulated manner, in order to generate an output-side AC voltage, the output-side AC voltage feeding a rectifier, whose output-side voltage, especially rectified voltage, functioning and/or acting as charging voltage for the accumulator, an arrangement for detecting the output current of the inverter being situated in the converter, the effective value of the output current in particular corresponding to the charge current of the converter, a current limiting arrangement of the converter limiting the output current of the inverter to a current value such

Abstract: Techniques for achieving a variety of selected direct current (DC) voltage outputs are disclosed. In one embodiment, a power generation system includes at least one multi-phase generator configured to generate an alternating current (AC) voltage. A plurality of diode rectifier circuits is coupled to the at least one multi-phase generator, which are configured to receive the AC voltage and convert the AC voltage to a DC voltage output. The power generation system includes configuration circuitry coupled to the plurality of diode rectifier circuits configured to configure the diode rectifier circuits in multiple configurations. For example, the configuration circuitry can configure the diode rectifier circuits in a series configuration to achieve a first DC voltage level, a parallel configuration to achieve a second DC voltage level, or a mixed series-parallel configuration to achieve a third DC voltage level.

Abstract: The disclosure provides a multilevel port under-voltage protection circuit with flying capacitor, comprising: a first circuit unit having first to fourth power switches sequentially connected in series, wherein the first circuit unit is arranged a positive terminal and a negative terminal of a DC input port and each of the switches can tolerate a reverse current; a first flying capacitor having a first terminal connected to the common node of the first power switch and the second power switch in series, and a second terminal connected to the common node of the third power switch and the fourth power switch in series; and a first shunt element connected in antiparallel to the first power switch or the fourth power switch, wherein a pulse peak current tolerated by the first shunt element is greater than the reverse current tolerated by the first power switch or the fourth power switch.

Abstract: Methods and systems for controlling a multipurpose power converter for converting power for a transport climate control system are provided. The multipurpose power converter includes a rectifier having a first leg, a second leg, and a third leg. The multipurpose power converter also includes a first switch, a second switch, and an inductor-capacitor network. The first switch and the second switch are connected to the third leg. The inductor-capacitor network is connected to the first switch. When the first switch is on and the second switch is off, the multipurpose power converter is configured as a single-phase AC power converter. When the first switch is off and the second switch is on, the multipurpose power converter is configured as a three-phase AC power converter.

Abstract: The present invention provides an electric power conversion device and an electric power generation system which are capable of suppressing ripples in a detected voltage and detection delay.

Abstract: A modular power converter with wide-bandgap semiconductors, in particular SiC semiconductors. The modular power converter has at least two base units. The base units are connected together on the input side, and each base unit has an input circuit on the input side and an output circuit on the output side. The input circuit and the output circuit are each formed by the wide-bandgap semiconductors arranged in a B6-bridge circuit. An intermediate circuit capacitor is connected in parallel with the input circuit and the output circuit forming an intermediate circuit. The input circuits of the base units or a sub-quantity of the base units are arranged in a series circuit. At least one inductor is arranged between each pair of input circuits.

Abstract: System and methods for power conversion are provided. Aspects include a first switching module comprising a first set of switches, wherein the first set of switches comprise wide-bandgap devices having a first bandgap, a second switching module comprising a second set of switches, wherein the second set of switches comprise semiconductor devices having a second bandgap, and wherein the first bandgap is larger than the second bandgap, an alternating current (AC) power source connected to the first switching module and the second switching module, a first capacitor bank, a second capacitor bank, and a controller configured to operate the first switching module and the second switching module to create a first direct current (DC) voltage across the first capacitor bank and a second direct current (DC) voltage across the second capacitor bank.

Abstract: A method for protecting data in a storage system is disclosed. In one embodiment, such a method includes detecting, by a first rack power controller, first battery-on status associated with a first uninterruptible power supply. The method further detects, by a second rack power controller, second battery-on status associated with a second uninterruptible power supply. The method communicates, from the first rack power controller to the second rack power controller, the first battery-on status. The method then triggers, by the second rack power controller, a dump of modified data from memory to more persistent storage upon detecting both the first battery-on status and the second battery-on status. A corresponding system and computer program product are also disclosed.

Abstract: A zero-sequence current balancer for a controlling zero-sequence current in a three-phase power system includes a cascade multilevel modular inverter (CMMI) coupled to the three-phase power system, wherein the CMMI has a plurality of modules, each module having a module capacitor, and a real power injector circuit provided between the three-phase power system and the CMMI, wherein the real power injector circuit is structured and configured to cause real power to injected into and/or absorbed from the CMMI to regulate a voltage of one or more of the module capacitors.

Abstract: A motor driver apparatus includes: a converter including a first electrical network configured to convert AC electrical power into DC electrical power, the first electrical network including at least one electronic element that includes a wide bandgap semiconductor material; and an inverter electrically connected to the converter, the inverter including a second electrical network configured to generate an AC motor power signal from the DC electrical power, the second electrical network includes a plurality of electronic elements that include a semiconductor material that is not a wide bandgap semiconductor material.

Abstract: A power conversion device which includes an input terminal that receives a rectified AC power, an active power factor correction circuit including a switching element that turns on or off and boosts an input voltage to correspond to a turn on time, an output terminal connected to an output of the active power factor correction circuit. The power conversion device includes a comparator that compares an output voltage of the output terminal with a reference voltage and outputs a signal having a different magnitude depending on the comparison result, a control circuit that adjusts a duty cycle of the control signal depending on an output signal of the comparator, and a discharge circuit electrically connected between the input terminal and an output of the comparator, and when the input voltage is equal to or greater than a first specified voltage, that discharges the output of the comparator.

Abstract: A controller (203) comprises a processing system (205) for controlling a power electronic converter during a short circuit taking place in a direct voltage side of the power electronic converter. The processing system recognizes a direction of current in a phase (126-128) of an alternating voltage side of the power electronic converter, sets a high-leg controllable switch (108-110) of the phase to a conductive state while keeping a low-leg controllable switch (111-113) of the phase in a non-conductive state when the recognized direction of the current is outwards from the power electronic converter, and otherwise sets the low-leg controllable switch to the conductive state while keeping the high-leg controllable switch in the non-conductive state. Thermal loadings of freewheeling diodes (114-119) of the power electronic converter are reduced since currents needed to burn input fuses (122) of the power electronic converter are shared between the controllable switches and the freewheeling diodes.

Abstract: An uninterruptible power supply system includes: at least one AC input terminal; an AC output terminal; an DC input terminal; at least one uninterruptible power supply (UPS) device having: a DC link; a DC/AC converter connecting on a first side to the DC link and on a second side to the AC output terminal; and a DC/DC converter connecting on a first side to the DC input terminal and on second side to the DC link. The uninterruptible power supply system further includes at least two switches; and at least one coupled differential mode inductor having two windings. Each switch of the at least two switches is connected in series with at least one winding of the at least one coupled differential mode inductor forming a series connection. The series connection is connected on a first side to the at least one AC input terminal.

Abstract: In response to a problem wherein a voltage of a capacitor of a power conversion device decreases when a voltage of an alternating current power supply is restored after once decreasing, the voltage of the capacitor drops below a maximum value of the voltage of the alternating current power supply when power is restored, and an inrush current occurs, the power conversion device, provided between an alternating current power supply and a load, is such that a decrease in an input voltage or an input current of a power converting unit is detected, a change in the voltage of the capacitor is predicted, and operations of the power converting unit are caused to stop before the voltage of the capacitor drops to or below the maximum value of the voltage of the alternating current power supply, thereby restricting an occurrence of an inrush current.

Abstract: An apparatus includes a controlled field alternator or utility source of electrical power, a conversion device, and a controller. The conversion device includes a first power input associated with a first power source, a second power input associated with a second power source, and circuitry configured to perform a first conversion of power from a first format from the first power source to a second format for charging the second power source and perform a second conversion of power from the second format for the second power source to a third format for supplying a load.

Abstract: A system including a control system is provided. The control system includes a main drive that receives power from a power source and outputs a variable frequency and a variable amplitude AC voltage. The control system also includes a controller to interface with the main drive and an electric machine. The controller receives one or more electrical signals associated with an operating condition of the electric machine from one or more sensors disposed between the electric machine and the main drive. The controller determines correction information based on the received electrical signals and based on a desired operating condition of the electric machine. The controller transmits the correction information to the main drive. The correction information corresponds to a rotor position of the electric machine or operating commands configured to implement the desired operating condition of the electric machine.

Abstract: A method for generating a current set point value for a charging device connected to an electrical network includes measuring at least one electrical voltage, calculating a filtered voltage according to the measured voltage and a value of electrical pulsation of the electrical network, estimating a frequency and the amplitude of the measured voltage according to the at least one measured voltage and the at least one filtered voltage, calculating a consolidated voltage according to the measured voltage and the filtered voltage, and generating a current set point value according to the consolidated voltage and the estimated amplitude.

Abstract: A battery including: a power supply bus; an assembly of electric cells and of first switches coupling the cells; second switches forming an H bridge and coupling said assembly to nodes; a first circuit for supplying first control signals to the first and second switches; a second circuit for delivering a first power supply voltage to the first circuit based on the voltage across one of the cells; a third circuit for supplying second control signals to at least two of the second switches and connected to the power supply bus; and first diodes coupling the first circuit to the two second switches and second diodes coupling the third circuit to the two second switches.