Abstract: A power converter includes a converter circuit, an inverter circuit, a clamp circuit, a scrubber circuit, and an element including a resistive component. The converter circuit generates from an AC voltage source a DC voltage with AC components superimposed. The inverter circuit has an input connected with an output of the converter circuit. The inverter circuit is configured to convert the DC voltage into an AC voltage by switching, and output the AC voltage to an inductive load. The clamp circuit includes a first capacitor and a first diode connected in series. The clamp circuit is connected between a positive output and a negative output of the converter circuit. The snubber circuit includes a second capacitor and a second diode connected in series. The snubber circuit is connected between the positive output and the negative output of the converter circuit.

Abstract: An input line connected current controlled bridge is dynamically coupled to an output line connected voltage controlled bridge of a single stage bidirectional isolated resonant power supply using a synchronous average harmonic current controller. A bridge current sensor measures low frequency and switching current across nodes of the current controlled bridge. Synchronous average harmonic bridge current is controlled using superimposed non-modulated and modulated feedback respectively to track a line current command and linearize coupling to the voltage controlled bridge. A power factor correction signal drives the line current command to regulate DC voltage busses. A feedforward and feedback trim circuit generates a command to the voltage controlled bridge to track input line voltage with attenuated harmonics. The single stage power supply has a defined interface to synchronize and regulate power sharing for one or more modules.

Abstract: Electronic circuitry includes a resonant circuit to receive a square-wave voltage based on a first DC voltage and generate a first voltage; a first transmission circuit to transmit the first voltage via a transformer including a primary inductor and a secondary inductor; a second transmission circuit to transmit the first voltage via a first capacitor and a second capacitor, the first capacitor being electrically connected to a first end of the primary inductor, the second capacitor being electrically connected to a second end of the primary inductor; a rectifier circuit to rectify the first voltage and generate a second DC voltage, the first voltage being transmitted by the first transmission circuit or the second transmission circuit; a first switch circuit configured to connect the first transmission circuit and the rectifier circuit; and a second switch circuit to connect the second transmission circuit and the rectifier circuit.

Abstract: A converter control circuit includes a terminal to be coupled to a switch node. The control circuit includes a valley sensing circuit coupled to the terminal and detects valleys in an oscillating voltage on the switch node. The valley sensing circuit has a first output and asserts a first control signal on the first output indicative of occurrence of a valley. A logic gate has a second output and asserts a second control signal on the second output to turn on a switching transistor. A switch-on control circuit has a first input and a second input. The first input couples to the first output. The second input couples to the second output. The switch-on control circuit asserts a third control signal to turn on the switching transistor responsive to the second control signal indicating that the switching transistor is to be on while the first control indicates a valley.

Abstract: A synchronous quadrature current compensator and synchronous average harmonic current compensator efficiently control harmonic current flow between isolated bridges of a clocked bidirectional resonant power converter. The synchronous average harmonic current compensator controls on a superposition of low frequency and switching current across nodes of a current controlled bridge to track commanded line current and harmonically linearize dynamic coupling admittance to a voltage controlled bridge. A difference amplifier attenuates the low frequency and reactive part of a bridge current signal to the quadrature current compensator. An error amplifier sums a synchronously modulated quadrature current signal, used to estimate transmitted harmonic current, to track a safely limited quadrature current command reference by generating a duty cycle.

Abstract: A three-level converting circuit, and a starting method and electronic equipment thereof. The circuit includes: a first voltage source; a first soft-start circuit; a first capacitor; a first switch, a second switch, a third switch and a fourth switch sequentially connected in series; a flying capacitor; a second soft-start circuit; a second voltage source and a second capacitor. The three-level converting circuit can pre-charge the flying capacitor, the first capacitor and the second capacitor when executing the starting method thereof, thereby preventing the over-voltage damage of the switches.

Abstract: A power path switch circuit includes: a power transistor unit including: a first vertical double-diffused metal oxide semiconductor (VDMOS) device, wherein a first current outflow end of the first VDMOS device is coupled to an output end of a power path; and a second VDMOS device, wherein a first current inflow end of the first VDMOS device and a second current inflow end of the second VDMOS device are coupled with a supply end of the power path; and a voltage locking circuit coupled to the first current outflow end and the second current outflow end, for locking a voltage at the second current outflow end to a voltage at the first current outflow end, so that there is a predetermined ratio between a first conductive current flowing through the first VDMOS device and a second conductive current flowing through the second VDMOS device.

Abstract: In at least one embodiment, a power conversion device for a vehicle is provided. The power conversion device includes a transformer, a microcontroller, and a control circuit. The microcontroller is configured to operate at a first frequency to receive a first current signal indicative of a current of a first voltage network and to generate a first envelope control signal in response to the first current signal. The controller is configured to selectively switch a first plurality of switches on a primary side and a second plurality of switches on a secondary side to convert a first input signal into first output signal in response to at least the first envelope control signal. The controller is further configured to selectively switch the first plurality of switches and the second plurality of switches at a second frequency that is greater than the first frequency.

Abstract: In this power conversion device, first three-phase AC voltages generated by an inverter and an AC filter are divided by first to third voltage dividers to generate second three-phase AC voltages, and third three-phase AC voltages that are line-to-line voltages of the second three-phase AC voltages and a neutral point voltage of the first three-phase AC voltages are detected. Then, DC components of the third three-phase AC voltages resulting from errors of voltage ratios of the first to third voltage dividers are obtained based on the detection results and contents in a storage unit, the DC components are removed from the third three-phase AC voltages to generate fourth three-phase AC voltages, and the inverter is controlled such that DC components of the fourth three-phase AC voltages are eliminated.

Abstract: A switching power supply apparatus is provided with a switching circuit and an even number of transformers. The transformer are provided with: cores each having an identical shape; primary windings each having an identical arrangement around the cores, and each having first and second terminals; and secondary windings each having an identical arrangement around the cores, and each having third and fourth terminals. The primary windings of the transformers are connected so that when a current flows from the first terminal to the second terminal of a first transformer, a current flows from the second terminal to the first terminal of a second transformer. The secondary windings of the transformers are connected so that when a current flows from the third terminal to the fourth terminal of the first transformer, a current flows from the fourth terminal to the third terminal of the second transformer.

Abstract: A three-phase grid-connected inverter, a control system thereof and a control method therefor. The inverter is a three-phase three-leg grid-connected inverter, and a filter capacitor is connected to a negative electrode of a DC input bus to form a filter loop, so as to filter harmonic wave in the circuit, realizing high-quality grid-connected current at small power, without increasing an inductance value, so that the parallel inverter device in the system operates stably and thus is applicable to photovoltaic microinverters. Moreover, the three-phase three-leg grid-connected inverter operates in a discontinuous conduction mode, that is, in a switching cycle, the inductive current is reduced to 0, so that the switching loss of the three-phase three-leg grid-connected inverter is reduced.

Abstract: An apparatus for processing electric power includes a power-converter having a path for power flow between first and second power-converter terminals. During operation the first and second power-converter terminals are maintained at respective first and second voltages. Two regulating-circuits and a switching network are disposed on the path. The first regulating-circuit includes a magnetic-storage element and a first-regulating-circuit terminal. The second regulating-circuit includes a second-regulating-circuit terminal. The first-regulating-circuit terminal is connected to the first switching-network-terminal and the second-regulating-circuit terminal is connected to the second switching-network-terminal. The switching network is transitions between a first switch-configuration and a second switch-configuration. In the first switch-configuration, charge accumulates in the first charge-storage-element at a first rate.

Abstract: The present description concerns a method of controlling a converter including two H bridges (110, 12) coupled by a transformer (130), wherein: two switching sequences between states are respectively applied to the two bridges; one of the states of a first one of the sequences corresponds to a given direction of application of a voltage to the transformer by the bridge having the first one of the sequences applied thereto; the first one of the sequences varies during a same halfwave of an AC voltage (V1) across one of the bridges (110), so that: during at least a first period, switchings into and out of said one of the states occur in a same state of a second one of the sequences; and during at least a second period, switchings into and out of said one of the states occur in different states of the second one of the sequences.

Abstract: A DC to DC boost converter for boosting low voltage power to levels for MVDC and HVDC transmission. The DC to DC boost converter comprises a bridge converter configured to receive a direct current (DC) input and to generate a resultant alternating current (AC) output, the bridge converter comprising a high-speed semiconductor switch bridge; a transformer configured to receive and step up the AC output of the bridge converter; and a rectifier configured to convert the stepped up AC output to pulsating DC output.

Abstract: A control device, for a power conversion device using a three-phase magnetic coupling reactor, includes: a first outer coil; a second outer coil; an inner coil disposed between the first outer coil and the second outer coil; and a core including a first outer core portion around which the first outer coil is wound, a second outer core portion around which the second outer coil is wound, and an inner core portion around which the inner coil is wound. Directions of magnetic fluxes generated in the first outer coil, the second outer coil, and the inner coil are opposite to each other in any combination. In a three-phase operation, the control device controls a value of the current flowing through the inner coil so as to approach values of the currents flowing through the first outer coil and the second outer coil.

Abstract: An improved power converter produces power through a power switch in response to an activation signal that has an on-time and a switching frequency. An on-time signal has a constant on-time and controls the on-time of the activation signal. An error signal indicates that the switching frequency is not equal to a reference frequency. A step up signal and a step down signal are based on the error signal. A count signal is increased in response to the step up signal and decreased in response to the step down signal. An on-time pulse has a duration that is related to a value of the count signal. The on-time pulse controls the constant on-time of the on-time signal and maintains the switching frequency at about the reference frequency.

Abstract: The voltage conversion circuit includes an input terminal, an output terminal, a first energy storage branch, a second energy storage branch, a third energy storage branch and a controller. The input terminal is used to connect with the input power supply. The output terminal is used to connect to the load. The first energy storage branch is connected to the input terminal, the second energy storage branch and the third energy storage branch. The second energy storage branch is connected to the first energy storage branch. The three energy storage branches are connected to the output terminal. The first energy storage branch includes a first capacitor, a second capacitor, a first switch, a second switch, a third switch and a fourth switch. The controller is connected with the first terminals of the switches of the first energy storage branch, the second energy storage branch and the third energy storage branch.

Abstract: A semiconductor device includes a substrate having a first surface, a first electrode, a second electrode and a third electrode formed on the first surface, a first semiconductor element and a second semiconductor element disposed in the interior of the substrate, a first wiring group electrically connecting the first electrode to the first semiconductor element, and a fourth wiring group electrically connecting the second semiconductor element to the second electrode. The first wiring group includes a first connection part disposed in the interior of the substrate. The fourth wiring group includes a second connection part disposed in the interior of the substrate. When a voltage is applied between the first electrode and the third electrode to cause current to flow through the second electrode, a direction of current flowing through first connection part is opposite to a direction of current flowing through the second connection part.

Abstract: A power supply device, a power supply management module and method are provided. The power supply device includes a power supply management module. The power supply management module includes a first and a second power supply module, a detection unit, and a switching control module. The first power supply module includes a first alternating current input end, a first rectifier circuit, and a first switch unit. A first end of the first switch unit is connected to the first rectifier circuit. The second power supply module includes a second alternating current input end, a second rectifier circuit, and a second switch unit. A third end and a fourth end of the second switch unit are connected to the second rectifier circuit and a second end of the first switch unit, respectively. The switching control module controls the first and the second switch unit according to a detection signal.

Abstract: An alternating current (AC)-to-direct current (DC) (AC-DC) converter circuit system, and a method of designing the AC-DC converter circuit system. The AC-DC converter circuit system includes an AC-DC converter configured to receive an AC grid input from an electric power source and convert the AC grid input into DC battery power. The AC-DC converter may include a primary transformer including a plurality of field-effect transistors (FETs), and a secondary transformer configured to allow the DC battery power to be output from a grid that is allowed to have a positive value by the primary transformer.