Abstract: Each one of the secondary converters has a corresponding transformer having a primary winding associated with a primary alternating current (AC) signal and a secondary winding associated with a secondary alternating current (AC) signal. A secondary controller provides secondary control signals to the secondary semiconductor switches of the secondary converters with one or more time-synchronized, target phase offsets with respect to an observed phase of the alternating current signal (e.g., primary alternating current signal or the secondary alternating current signal) to provide the target phase offset (or targeted phase offsets) commensurate with or sufficient to support a required electrical energy transfer from the primary controller to the corresponding secondary controller (or secondary controllers).

Abstract: This disclosure describes a control circuit to manage the energy flow for an integrated motor generator (IMG), such as an integrated starter generator (ISG) system. The circuit regulates the output voltage of the IMG when the IMG operates in generator mode. The circuit includes an additional switch for each phase connected in anti-series with the half-bridge circuit for the phase, e.g., the drain of the additional switch connects to the drain of the high-side switch. When the ISG is in generator mode, the additional switches are controlled, e.g., to charge the battery at a constant voltage and current throughout the speed range of the ISG (i.e. high rpm and low rpm). In generator mode, the high-side switches may be turned off, which configures the high-side switches to act as a diode and block battery discharge for low rpm operation when the phase voltages are lower.

Abstract: A power converting apparatus includes: a capacitor including a plurality of cells, with a number and arrangement of the cells being determined according to characteristics of a motor; power converters separately disposed on opposite sides of the capacitor; a first cooler including a plurality of cooling tubes through which cooling water flows, located between the capacitor and the power converters, and cooling the capacitor and the power converters by being brought into surface contact with the capacitor and the power converters, with a length of any one of the plurality of the cooling tubes being determined according to the characteristics of the motor; and a housing in which the capacitor, the power converters, and the first cooler are assembled.

Abstract: A resonant H-bridge laser driver circuit topology is described that can achieve high current levels at narrow pulse widths while using smaller transistor sizes. The resonant H-bridge topology can utilize parasitic inductors in conjunction with an external capacitor to create a resonant circuit in parallel with the load.

Abstract: Each one of the secondary converters has a corresponding transformer having a primary winding associated with a primary alternating current (AC) signal and a secondary winding associated with a secondary alternating current (AC) signal. A secondary controller provides secondary control signals to the secondary semiconductor switches of the secondary converters with one or more time-synchronized, target phase offsets with respect to an observed phase of the alternating current signal (e.g., primary alternating current signal or the secondary alternating current signal) to provide the target phase offset (or targeted phase offsets) commensurate with or sufficient to support a required electrical energy transfer from the primary controller to the corresponding secondary controller (or secondary controllers).

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: A modular multilevel converter and a power electronic transformer is provided. The modular multilevel converter includes: a low-frequency AC to DC conversion module, comprising three branch circuits connected in parallel between output ends, each branch circuit being formed of multiple IGBT half-bridge circuits connected in series, and an electric coupling point of two adjacent IGBT half-bridge circuits in a middle position of the branch circuit being connected to a voltage input end Vin; a DC to high-frequency AC conversion module, connected between the output ends, the DC to high-frequency AC conversion module being formed of multiple IGBT half-bridge circuits connected in series, the DC to high-frequency AC conversion module having multiple sets of output ends. The MMC and power electronic transformer includes a smaller volume, lower cost and better stability in use.

Abstract: A gate resistance adjustment device has a waveform input unit that inputs waveforms of a drain voltage or a collector voltage and a drain current or a collector current at least one of during a switching device is turned on and during the switching device is turned off, an extraction unit that extracts time required for at least one of turning on or off the switching device and a steady-state drain current or a steady-state collector current of the switching device based on the waveforms input by the waveform input unit, a calculator that calculates a gate resistance of the switching device based on the time and the steady-state drain current or the steady-state collector current that are extracted by the extraction unit, and a setting unit that sets a gate resistance calculated by the calculator in the switching device.

Abstract: Systems and methods to reduce magnetic flux in a switched mode power supply are disclosed. An example welding-type power supply includes a switched mode power supply, comprising: a transformer configured to transform an input voltage to a welding-type voltage; a capacitor in series with a primary winding of the transformer; switches configured to control a voltage applied to a series combination of the primary winding of the transformer and the capacitor; a comparator coupled to the transformer and configured to compare the welding-type output voltage to a threshold voltage; and a flux accumulator to determine a net flux in the transformer based on the voltage applied to the series combination of the primary winding of the transformer and the capacitor.

Abstract: Flyback converters and corresponding methods are provided. In an implementation, an on-time of a low-side switch of the flyback converter is kept at half a resonance period of a resonance defined by a leakage inductance of a transformer of the flyback converter and a capacitance value of a capacitor coupled to a primary winding of the transformer. Other methods, controllers and flyback converters are also provided.

Abstract: Provided is a power conversion device by which an inverter MOS transistors included in an inverter can be prevented from short-circuiting. It has a DC/DC converter unit converting a voltage of DC power to be inputted, a transformation unit transforming the DC power converted by the DC/DC converter unit, an inverter unit converting the DC power transformed by the transformation unit to AC power, a control unit driving/controlling the inverter unit, a wireless power reception unit receiving power fed by wireless power feed to supply it to the control unit, a wireless power transmission unit transmitting power to the wireless power reception unit, and a power supply unit supplying power to the wireless power transmission unit.

Abstract: A half-bridge module includes a substrate with a base metallization layer divided into a first DC conducting area, a second DC conducting area and an AC conducting area; at least one first power semiconductor switch chip bonded to the first DC conducting area and electrically interconnected with the AC conducting area; at least one second power semiconductor switch chip bonded to the AC conducting area and electrically interconnected with the second DC conducting area; and a coaxial terminal arrangement including at least one inner DC terminal. The at least first outer DC terminal and the at least one second outer DC terminal protrude from the module and are arranged in a row, such that the at least one inner DC terminal is coaxially arranged between the at least one first outer DC terminal and the at least one second outer DC terminal.

Abstract: A detection error occurs due to ripple when a current transformer detects zero cross of current. Provided is a detection device for detecting zero cross of output current output from switching circuit including a first switching element and a second switching element connected in series, and the detection device has: an acquisition unit which acquires an observation value that is based on gate current or an observation value based on gate voltage of at least one switching element of the first switching element and the second switching element, during Miller period in which Miller capacitance between a drain and a gate is charged; and a detection unit which detects zero cross of output current flowing between (i) output terminal between first switching element and second switching element and (ii) a load connect to output terminal, based on observation value during Miller period.

Abstract: The present invention relates to a DC-DC converter and to a method for controlling a DC-DC converter with high dielectric strength and reduced power losses. An optimized control of a potential-isolating multi-level half-bridge converter according to a phase-shifted full-bridge configuration with a novel modulation method is proposed.

Abstract: A converter (30) comprises first and second DC terminals (32,34) connectable in use to a DC network (40), the converter (30) including a converter limb (36) extending between the DC terminals (32,34), the converter limb (36) including first and second limb portions separated by an AC terminal (38), the AC terminal (38) connectable in use to an AC voltage, each limb portion including at least one director switch (44) connected in series with a waveform synthesizer between the AC terminal (44) and a respective one of the first and second DC terminals (32,34), the waveform synthesizers operable to control the modulation of an AC voltage waveform at the AC terminal (38), each director switch (44) operable to switch the respective waveform synthesizer into and out of circuit between the respective DC terminal (32,34) and the AC terminal (38); and a controller (56) programmed to selectively control the switching of the director switches (44) to switch both of the limb portions into circuit concurrently to form a cu

Abstract: An induction heating power supply apparatus includes a smoothing section to smooth pulsating current of DC power output from a DC power supply section, and an inverter to convert the DC power smoothed by the smoothing section to AC power. The smoothing section includes a pair of bus bars connected to the inverter and a capacitor connected to the pair of bus bars. Each of the bus bars has an external surface extending in a current flow direction, the external surface including a flat face having a larger surface dimension than another face of the external surface in a direction perpendicular to the current flow direction. The bus bars are arranged in a layered manner such that the flat faces of the bus bars are opposed to each other and such that an insulator is sandwiched between the flat faces of the bus bars.

Abstract: A power generation module including: a power generation element; an AC generation circuit configured to convert DC current output from the power generation element into AC current; a module-side inductance element configured to generate a magnetic field from the AC current; a phase information acquiring circuit; and a control circuit; and a power-collector closed circuit including a power collector-side inductance element configured to electromagnetically couple to the module-side inductance element to generate an induced electromotive force, wherein, when reference AC current flowing in the power-collector closed circuit flows through the power collector-side inductance element, the module-side inductance element electromagnetically coupled to the power collector-side inductance element generates AC current corresponding to the reference AC current, and the control circuit acquires phase information related to the reference AC current via the phase information acquiring circuit so that the control circuit co

Abstract: An uninterruptible power supply (UPS) is provided that includes a split direct current (DC) link having a first capacitor coupled between a positive DC link terminal and a first node, and a second capacitor coupled between the first node and a negative DC link terminal. The UPS also includes a rectifier coupled to an input of the split DC link and a controller coupled to the rectifier. The rectifier includes first, second, and third legs, wherein each leg is configured to convert a first alternating current (AC) voltage received from an AC source into a DC voltage to be provided to the split DC link, and a fourth leg configured to balance DC link voltages of the first and second capacitors. The controller is configured to maintain functionality of the rectifier during at least one of a partial utility power outage, a full utility outage, and a failure of at least one of the first, second, third, and fourth legs.

Abstract: The present invention disclose a method and apparatus for pulse-width modulation (PWM) of a variable-frequency drive (VFD), the method comprising: for each sector of a space vector graph for PWM of the VFD, identifying at least two possible clamping phases in switching between the vectors in the sector; comparing currents in multiple phases in at least one PWM cycle; in the sector of the space vector graph corresponding to the PWM cycle, determining the possible clamping phase with the maximum current in the at least two possible clamping phases; and clamping the determined possible clamping phase with the maximum current.

Abstract: A switch circuit of a converter includes three switch units. A first switch unit includes a first switch device, a second switch device, a third switch device, and a fourth switch device that are connected in series. A second switch unit includes a fifth switch device and a sixth switch device that are connected in series. A third switch unit includes a seventh switch device and an eighth switch device that are connected in series. When the first switch device and the fifth switch device are switched on, the seventh switch is controlled to be switched on. When the fourth switch device and the sixth switch device are switched on, the eighth switch device is controlled to be switched on, thereby effectively reducing a conduction loss of the converter.

Abstract: A system comprises a first inverter switch and a second inverter switch connected in series between a positive dc bus and a negative dc bus, a freewheeling apparatus connected between a common node of the first inverter switch and the second inverter switch, and ground, a first soft switching network coupled between the positive dc bus and the common node of the first inverter switch and the second inverter switch, wherein the first soft switching network is configured such that the first inverter switch is of a first zero voltage transition and a second soft switching network coupled between the negative dc bus and the common node of the first inverter switch and the second inverter switch, wherein the second soft switching network is configured such that the second inverter switch is of a second zero voltage transition.

Abstract: A system for reducing a resonant oscillation on a direct current bus is disclosed. The system includes a battery, a first capacitor connected in parallel with the battery, and an inductor connected in series with the first capacitor. The system also includes a first element connected in series with the inductor, a second element connected in parallel with the inductor and the first element, and a second capacitor connected in series with the first element. The system also includes an electric machine connected to the second capacitor. During a re-generation mode for charging the battery, a re-generation current flows from the electric machine to the battery, passing through the first element and the inductor and bypassing the second element. Additionally, during a motor mode, a motor current flows from the battery to the electric machine, passing through the second element and bypassing the first element and the inductor.

Abstract: A snubber circuit includes a clamp circuit and a voltage conversion circuit. The clamp circuit is configured to absorb electrical energy of a main circuit from a pair of secondary-side voltage points on a secondary side of the main circuit to clamp a secondary-side voltage. The main circuit is of insulating type and is configured to perform electric power conversion. The voltage conversion circuit which is of insulating type is electrically connected to a pair of primary-side voltage points on a primary side of the main circuit and is configured to subject, to direct-current conversion, the direct-current voltage generated by the clamp circuit and output the direct-current voltage to the pair of primary-side voltage points. The voltage conversion circuit includes a transformer, a first capacitance component electrically connected to a primary winding wire of the transformer, and a second capacitance component electrically connected to a secondary winding wire of the transformer.

Abstract: A generation circuit is configured to generate an output voltage command value Vor* for an inverter based on a three-phase reference value Vr, a zero-phase reference value, a detected value of a current sensor, and a detected value of a voltage sensor. A compensation circuit is configured to compensate for a voltage drop in a three-phase AC line when three-phase AC power is supplied from the inverter to an AC load. A corrector is configured to correct the output voltage command value Vor* based on a compensation command value Vol. A control circuit is configured to control the inverter based on an output voltage command value Vo* corrected by the corrector.

Abstract: The present invention relates to a variation of the clock frequency for pulse-width-modulated actuation of an electrical converter. In this context, the clock frequency can be specifically lowered in an angle range of an electrical period of an AC current to be output. The specific lowering of the clock frequency during predetermined angle ranges of the electrical period allows the load on the switching elements in the converter to be adjusted. As a result, it is possible, by way of example, to adjust the temperature distribution or thermal load in the converter.

Abstract: A three-phase, N-level inverter and method are disclosed. A circuit topology of the inverter comprises first, second and third sets of switches and first, second and third inductors. Each switch comprises at least first, second and third terminals, the first terminals being control terminals. The first terminals of the first, second and third inductors are electrically coupled to the first, second and third sets of switches, respectively. A current controller performs a control algorithm that causes it to output first, second and third sets of gating signals to the control terminals of the switches of the first, second and third sets of switches, respectively, to cause them to be placed in an on state or an off state in a particular sequence to perform zero voltage switching while maintaining synchronization of the three phases of the three-phase, N-level inverter.

Abstract: Systems and methods for supplying power at a medium voltage from an uninterruptible power supply (UPS) to a load without using a transformer are disclosed. The UPS includes an energy storage device, a single stage DC-DC converter or a two-stage DC-DC converter, and a multi-level inverter, each of which are electrically coupled to a common negative bus. The DC-DC converter may include two stages in a unidirectional or bidirectional configuration. One stage of the DC-DC converter uses a flying capacitor topology. The voltages across the capacitors of the flying capacitor topology are balanced and switching losses are minimized by fixed duty cycle operation. The DC-DC converter generates a high DC voltage from a low or high voltage energy storage device such as batteries and/or ultra-capacitors. The multi-level, neutral point, diode-clamped inverter converts the high DC voltage into a medium AC voltage using a space vector pulse width modulation (SVPWM) technique.

Abstract: Disclosed are a power converting apparatus and a photovoltaic module including the same. The photovoltaic module includes: a converter configured to convert a level of DC power; an inverter configured to convert a half sine wave voltage from the converter into an AC voltage; and a controller configured to control the converter and the inverter based on an output current and an output voltage of the inverter, wherein a plurality of switching elements in the inverter is respectively turned on once in each cycle, and wherein the controller is configured to, based on a difference between a grid voltage and an output current of the inverter, control a bidirectional current to flow to the converter. Accordingly, the power converting apparatus including the unfolding inverter is able to control a power factor.

Abstract: An electrical energy router includes cascaded submodules. Each submodule of the cascaded submodules includes a rectifying stage and an isolating stage. The rectifying stage includes a structure of a neutral point clamped full bridge. The isolating stage includes a DC-DC converter, which includes a primary side, a secondary side and a transformer. The primary side includes a structure of a neutral point clamped half bridge. A DC side of the neutral point clamped half bridge is connected to a DC bus line of the rectifying stage.

Abstract: A method of monitoring the condition of a circuit comprises establishing a known baseline signal for a type of circuit (each is somewhat different) and defining these characteristics in terms of the lead and trailing edge angular components (@ zero crossing point), the voltage (amplitude), and the period (time length) of the waveform. Ideally, the angular component of the square wave should be vertical, or at 90 degrees to x-axis. The baseline non-regular square wave that is composed of current, voltage, any harmonic thereof, or the combination of these signals which best indicate predictive measurement attributed to the type of circuit being monitored. Future wave forms indicate the rate of decay based upon the aggregated angular, amplitude, and period components of the zero-crossing points when compared to the baseline signal and/or prior waveform of the observed specific splice. The rate of decay can help determine the life expectancy of the circuit.

Abstract: A universal power converter of the present application may include a link stage between an input stage and an output stage that operates at a higher frequency than the frequency of the input power source. As a result, a more compact capacitor may be used, thus reducing the size of the power converter. In some embodiments, the link stage may be a partially resonant link that permits zero current switching (ZCS). ZCS operation may reduce switching losses during operation. Universal power converters of the present application utilizing ZCS may be implemented using naturally commutated switches, such as silicon controlled rectifiers (SCRs), instead of transistor switches. Such power converters utilizing SCRs may be more reliable than power converters utilizing transistor switches. Additionally, control circuitry required to operate such power converters may be simplified. Accordingly, a more compact, efficient, and reliable universal power converter may be achieved.

Abstract: This discloses apparatus including, but not limited to, an all Direct Current (DC) energy transfer circuit, a energy transfer controller, an all-DC energy transfer network, components of use in such circuits, and application apparatus that benefits from including and/or using the all-DC energy transfer device and methods of operating the above in accord with this invention. The application apparatus may include, but are not limited to, a hybrid electric vehicle, an electric vehicle, and/or a solar power device, in particular, a hybrid electric/internal combustion engine automobile.

Abstract: The invention relates to a method for operating an inverter (1) and to an inverter (1) for converting a direct voltage (UDC) into an alternating voltage (UAC) with a specified grid frequency (fAC) for supplying loads (12) and/or feeding into a supply grid (13), comprising a direct voltage input (2) and multiple AC power units (6) which are connected in parallel and comprise semiconductor switches (7) in a bridge circuit and freewheeling diodes (8) arranged parallel thereto. The outputs of the AC power units (6) are connected to an alternating voltage output (10) via a respective inductivity (9).

Abstract: A power conversion apparatus includes positive-side and negative-side switching elements, positive-side and negative-side gate drive circuits, a capacitor and a gate signal controller. The positive-side switching element is disposed between a positive-side direct-current bus and an output node. The negative-side switching element is disposed between a negative-side direct-current bus and the output node. The gate drive circuits turn on and off the respective switching elements. The capacitor is inserted between the buses. The gate signal controller transmits, to the gate drive circuits, gate signals to instruct turning on or off the switching elements. In response to a start instruction of pre-charge of the capacitor, the gate signal controller transmits a first gate signal to temporarily turn on and then off the positive-side gate drive circuit and transmits a second gate signal to temporarily turn on and then turn off the negative-side gate drive circuit.

Abstract: A power inverter includes primary switches, a transformer, a rectifier, a high voltage (HV) bus, an H-bridge, a detector, and a feedback controller. The transformer receives a switched direct current (DC) signal from a battery. The H-bridge outputs an AC signal to a stepped load. The detector detects a step-up load change by monitoring the stepped load. The feedback controller regulates a duty cycle of the AC signal, thereby reducing total harmonic distortion (THD) affecting the power inverter and the stepped load. The feedback controller further regulates the duty cycle of the AC signal by temporarily setting the primary switching duty cycle at a maximum allowable level in response to the step-up load change.

Abstract: A DC-DC converter that provides both buck and boost voltages using a single inductor is disclosed. The DC-DC converter includes an H-bridge circuit having an inductor having first and second terminals, and a number of switches. The switches include a first switch coupled between the second inductor terminal and a boost voltage node, a second switch coupled between the second inductor terminal and a buck voltage node, and a third switch coupled between the first inductor terminal and an input voltage node. A control circuit is coupled to activate the switches in accordance with a number of different phases such that a buck voltage (e.g., less than the input voltage) is provided on the buck voltage node, while a boost voltage (e.g., greater than the input voltage) is provided on the boost voltage node.

Abstract: A method and apparatus for power conversion comprising a three-port converter comprising a DC port for coupling to an external DC line, an AC port for coupling to an external AC line, and a storage port, internal to the three-port converter, for storing excess energy and discharging needed energy during power conversion, wherein the storage port is located on a DC-side of the three-port converter and is decoupled from the DC port such that a voltage on the storage port can be controlled independently of a DC voltage on the DC port.

Abstract: Technologies for interactive predictive control of uninterruptible power supply systems are disclosed. In an illustrative embodiment, a method of controlling a double-conversion uninterruptible power supply (UPS) system may include defining, with a digital signal processor (DSP), a curve as a function of a plurality of user-input reference points associated with an inductor coupled to either an input or an output of the double-conversion UPS system, where the curve is indicative of an electromagnetic behavior of the inductor. The method may also include determining, with the DSP, in response to an application of current to the inductor, an inductance value for the inductor based on the defined curve and the applied current. The method may further include setting, with the DSP, as a function of the determined inductance value, a duty cycle to control switching of at least one of an active rectifier and an inverter of the double-conversion UPS system.

Abstract: A power supply ECU is configured to: adjust magnitude of transmission power by adjusting a duty of an output voltage of an inverter; and adjust a frequency of the transmission power by controlling the inverter. The power supply ECU is configured to execute first control and second control. In the first control, the frequency is adjusted such that a loss of the inverter decreases while maintaining the transmission power, when a temperature of the inverter exceeds a limit temperature. In the second control, the transmission power is reduced, when the temperature of the inverter exceeds the limit temperature even if the first control is executed.

Abstract: A vehicle includes an inverter having first and second half bridges configured to provide multiphase voltage to an electric machine. The vehicle further includes a controller configured to activate a switch of the first half bridge and pulse width modulate a switch of the second half bridge to conduct resonant output on a rail of the inverter to the electric machine such that the multiphase voltage is created for at least a sixth of a cycle of the electric machine. The activation is responsive to a torque command.

Abstract: Embodiments described herein include a solid-state switch tube replacement for the radar system such as, for example, the SPY-1 radar system. Some embodiments provide for a technology for the precision switching that enables IGBT power modules to operate robustly in a series configuration and/or a parallel configuration to produce precision switching at high voltage (e.g., 20 kV and above) and high frequencies (e.g., 1 MHz and above).

Abstract: A cascaded bootstrapping gate driver configured to provide quick turn-on of a high side power FET and low static current consumption. The cascaded bootstrapping gate driver includes an initial bootstrapping stage with a resistor to decrease static current consumption during transistor turn-off. A secondary bootstrapping stage is driven by the initial bootstrapping stage and includes a GaN FET transistor with a low on resistance in place of the resistor. The source terminal of the GaN FET transistor provides a gate driving voltage to the high side power switch FET. The low on-resistance of the GaN FET transistor provides quick turn-on of the high side power FET. Transistors in the cascaded bootstrapping gate driver are preferably enhancement mode GaN FETs and may be integrated into a single semiconductor die.

Abstract: A three-phase inverter includes three series circuits that are connected in parallel to a capacitor connected in parallel to a DC voltage source. Each of the three series circuits includes two semiconductor switching elements connected in series. A connection point between the two semiconductor switching elements is used as an AC output terminal for each phase. The three-phase inverter generates PWM pulses of three phases including a PWM pulse of one phase, whose pulse width of a positive side pulse in one switching cycle is the largest, and including PWM pulses of the other two phases such that a positional relationship between positive side pulses of the other two phases is a positional relationship in which an overlapping range on a time axis is smaller as compared with a state in which a positive side pulse of one phase encompasses a positive side pulse of the other pulse.

Abstract: A 3-level T-type neutral point clamped (NPC) inverter/rectifier is disclosed in which neutral point clamping is dynamically enabled/disabled responsive to load, e.g. enabled at low load for operation in a first mode as a 3-level inverter/rectifier and disabled at high/peak load for operation in a second mode as a 2-level inverter/rectifier. When the neutral clamping leg is enabled only under low load and low current, middle switches S2 and S3 can be smaller, lower cost devices with a lower current rating. Si, SiC, GaN and hybrid implementations provide options to optimize efficiency for specific load ratios and applications. For reduced switching losses and enhanced performance of inverters based on Si-IGBT power switches, a hybrid implementation of the dual-mode T-type NPC inverter is proposed, wherein switches S1 and S4 comprise Si-IGBTs and switches S2 and S3 of the neutral clamping leg comprise GaN HEMTs. Applications include electric vehicle traction inverters.

Abstract: A vehicle includes a traction battery comprising a plurality of cells. The vehicle also includes a plurality of power converters each electrically coupled between a corresponding group of cells and an electrical bus. A controller is programmed to allocate current demand to the power converters and operate the power converters to minimize energy consumption and losses.

Abstract: A module for interconnecting a pair of DC sources or a pair of DC loads into a DC bus includes: a first port for each source or load; a switching cell for each first port, each cell having a pair of terminals and a switching node; a second port operatively connected to the DC bus and having a pair of terminals, one of the pair of terminals of the second port being connected to one of the terminals of one of the cells and the other of the pair of terminals of the second port being connected to one of the terminals of the other of the cells; and a filter inductor connected between the switching nodes of the cells. Systems including the module and methods utilizing the system are also disclosed.

Abstract: A power transfer system includes power conversion circuitry that has first circuitry and second circuitry on either side of a transformer that include a transformer having a power supply, a switch, a capacitor connected in parallel with a winding of the transformer, and an inductor connected between the power supply and the capacitor. The inductor provides an additional resonance current path through the power conversion circuitry that is configured to reduce a peak voltage at the switch. A direction of power transfer through the power conversion circuit is determined, and the first circuitry and the second circuitry are configured based on the determined direction of power transfer. The switches of the first circuitry and second circuitry are controlled using switching based on the determined direction of power transfer and a quantity of power transfer.

Abstract: A PWM controlled multi-phase resonant voltage converter may include a plurality of primary windings powered through respective half-bridges, and as many secondary windings connected to an output terminal of the converter and magnetically coupled to the respective primary windings. The primary or secondary windings may be connected such that a real or virtual neutral point is floating.

Abstract: Rectifier circuit. At least some of the example embodiments are circuits including: an anode terminal; a cathode terminal; a field effect transistor (FET) defining a drain, source, and gate, the source coupled to the anode terminal, and the drain coupled to the cathode terminal; a diode having anode and cathode, the anode coupled to the cathode terminal; a bootstrap capacitor coupled between the cathode of the diode and the anode terminal; a FET controller coupled to the gate of the FET and a node between the diode and bootstrap capacitor; the FET controller configured to make the FET conductive as the circuit becomes forward biased, and the FET controller configured to make the FET non-conductive during periods of time when the circuit is reverse biased.

Abstract: Electronic circuitry for independently adjusting color temperature and brightness of an LED light fixture is disclosed utilizing two wires. According to one embodiment, a color-tunable and dimmable LED light fixture has first and second LED light strings connected in an anti-parallel arrangement.