Abstract: The present application provides a conversion system and a control method, including N power converters and N controllers, and N controllers one-to-one corresponds to the N power converters. In addition to receiving a first side current and a second side voltage of a corresponding power converter, each of the N controllers can also receive a neighboring direct current voltage signal which only reflects second side voltages of other M power converters in the conversion system, and perform voltage control on the corresponding power converter according to the received signal. The present application adopts fully distributed control, and does not need to set up a centralized controller. When parts of controllers fail, the other controllers can continue to work, so the reliability is higher.

Abstract: The present disclosure provides a magnetic component including a winding, a first magnetic core and a circuit component, and a wireless power-transferring device including the magnetic component. The winding is formed by winding a coil, and having a first penetration portion at a middle portion of the winding. The first magnetic core is disposed at a side of the winding, and a first insulating support portion is disposed between the first magnetic core and the winding. The circuit component is located within the first penetration portion and electrically connected with the winding. Disposing the circuit component within the first penetration portion at the middle portion of the winding can effectively save space.

Abstract: A conversion device includes: an inductor connected to the AC power grid; a first-stage converter configured to output a bus voltage based on the AC power grid; a second-stage converter configured to convert the bus voltage into an output voltage to the load; and a filtering network, wherein a first resistance-capacitance circuit is disposed between the first and third terminals of the filtering network, a second resistance-capacitance circuit is disposed between the second and third terminals of the filtering network, the first terminal of the filtering network is connected to the AC power grid, the second terminal of the filtering network is connected to the bus or the second terminal of the second-stage converter, and the third terminal of the filtering network is grounded through a first capacitor.

Abstract: A transformer includes a primary coil unit including a primary winding, a first insulating portion and a shielding layer, wherein the first insulating portion wraps the primary winding, the shielding layer covers an outer surface of the first insulating portion, the shielding layer includes an opening, and a part of the first insulating portion is exposed at the opening; an outgoing wire terminal in the opening and having a first portion and a second portion connected with each other, the first portion coupled to the primary winding and wrapped by the first insulating portion, the second portion being exposed out of the first insulating portion; a connecting wire having a first end connected to the second portion of the outgoing wire terminal; and an insulating sleeve partially wrapping the connecting wire, and a second end of the connecting wire being exposed out of the insulating sleeve, (FIG. 17).

Abstract: A conversion device includes: an inductor electrically connected to the AC power grid; a first-stage converter configured to output a bus voltage according to the AC power grid, wherein the first-stage converter includes an N-level alternating current-direct current (AC-DC) converter, and the N-level AC-DC converter includes a plurality of switch bridge arms, wherein both an upper bridge arm and a lower bridge arm of each of the plurality of switch bridge arms of the N-level AC-DC converter include a plurality of semiconductor devices connected in series, and a rated withstand voltage Vsemi of each of the semiconductor devices is greater than or equal to (Vbus*?)/((N?1)*Nseries*?); and a second-stage converter configured to convert the bus voltage into an output voltage to supply energy to the load.

Abstract: An LLC resonant converter includes a square wave generator having a first switch and a second switch, a resonant tank, a transformer, a synchronous rectifying (SR) unit having a first SR switch and a second SR switch, and a control unit. The control unit provides a first control signal controls the first switch, a second control signal controls the second switch, a first rectifying control signal controls the first SR switch, a second rectifying control signal controls the second SR switch. When a frequency control command is lower than a phase-shift frequency, the first control signal and the first rectifying control signal are frequency-variable and phase-shifted, and the second control signal and the second rectifying control signal are frequency-variable and phase-shifted.

Abstract: A ground fault detection method for a power converter is provided, including: measuring, by a voltage sensor, a first voltage and a second voltage respectively, and converting the first voltage and the second voltage into a first digital voltage signal and a second digital voltage signal; receiving, by a controller, the first digital voltage signal and the second digital voltage signal, extracting a corresponding feature quantity of the first voltage and a corresponding feature quantity of the second voltage according to the first digital voltage signal and the second digital voltage signal; and further determining a type of the ground fault of the power converter and locating a ground fault; and when the power converter has a ground fault, shutting down the power converter.

Abstract: The present disclosure provides an assembly structure for providing power for a chip and an electronic device using the same. The assembly structure includes: a circuit board, configured to provide a first electrical energy; a chip; a power converting module, configured to electrically connect the circuit board and the chip, convert the first electrical energy to a second electrical energy, and supply the second electrical energy to the chip, wherein the chip, the circuit board and the power converting module are stacked; and a connection component, configured to electrically connect the circuit board and the power converting module. The present disclosure assembles a power converting module with a circuit board and a chip in a stacking manner, which may shorten a current path between the power converting module and the chip, reduce current transmission losses, improve efficiency of a system, reduce space occupancy and save system resource.

Abstract: The invention discloses an overcurrent protection circuit, coupled to a DC bus between first and second DC ends, the DC bus including positive bus and negative bus, and the circuit including: a main protection branch connected in series with the positive or negative bus, and including first and second protection switches connected in series and connected to a first node; a freewheeling switch branch having two ends, one end being connected to the first node, the other end being connected to an opposite bus to the main protection branch; a detection unit coupled to the DC bus for detecting a voltage or a current of the DC bus to output an overcurrent detection signal; and a control unit coupled to the detection unit and the main protection branch, and configured to control the main protection branch according to the overcurrent detection signal.

Abstract: The present application provides a conversion system and a control method, including N power converters and N controllers, where each power converter includes a first side and a second side, the first sides of the N power converters are electrically coupled in series, and currents flowing through the first sides of the N power converters are the same, the N controllers correspond to the N power converters one to one. Each controller contains a common-mode voltage loop and a current loop. The common-mode voltage loop is configured to receive a voltage reference signal and a voltage feedback signal, and output a given signal. The current loop is configured to receive the given signal, a current reference signal, and a first side current of a corresponding power converter, and output a common-mode control signal to modulate a first side voltage of the corresponding power converter.

Abstract: The present disclosure provides a power module and a method for manufacturing the power module. The power module includes a chip, a passive element and connection pins. The connection pins are provided on a pin-out surface of the power module, and are electrically connected to at least one of a chip terminal of the chip and the passive element; a projection of the chip on the pin-out surface of the power module does not overlap with a projection of the passive element on the pin-out surface of the power module, and an angle between the terminal-out surface of the chip and the pin-out surface of the power module is greater than 45° and less than 135°.

Abstract: The present disclosure provides a control method of a DC/DC converter and a related DC/DC converter. The control method allows for: detecting a difference between a first voltage and a second voltage; if an absolute value of the difference between the first voltage and the second voltage is greater than or equal to a preset value, reselecting desired operating states of respective switches in a 1-level state according to the difference between the first voltage and the second voltage and a direction of an average current from a fourth node to a first passive network in the 1-level state; and thus outputting a control signal to enable the voltage difference between the first capacitor and the second capacitor to be reduced, thereby effectively adjusting the neutral-point voltage balance of the DC/DC converter.

Abstract: A power module structure includes a first metal layer, a second metal layer, a third metal layer and a fourth metal layer, wherein the fourth metal layer is connected to the second metal layer via a connecting bridge; at least one first switch including a first end connected to the third metal layer and a second end connected to the second metal layer; and at least one second switch including a third end connected to the fourth metal layer and a fourth end connected to the first metal layer; wherein the projection of the first metal layer and the projection of the third metal layer are overlapped to form a first overlapping area; wherein the direction of the current flowing through the first metal layer is opposite to the direction of the current flowing through the third metal layer.

Abstract: The present disclosure provides a printed circuit board (PCB) based planar winding structure for a main power transformer and/or an auxiliary power need. The PCB-based planar winding structure can confine electric field through magnetic core potential control and thus create partial discharge (PD) free design for medium voltage (MV) applications. Meanwhile, the winding structure can be formed in the PCB manufacturing process to create a more modular and reliable structure, thereby enhancing manufacturability. Techniques, such as termination treatment, primary and secondary winding arrangements, etc., can be used to control the electrical stress in the medium voltage applications.

Abstract: The present disclosure provides a high voltage device built from modular low voltage cells. Each low voltage cell includes a plurality of low voltage semiconductor devices and one or more low voltage passive components. Each cell can be a current-bidirectional two-quadrant switch or a four-quadrant switch. All the cells may be identical and controlled with a delay time in between. Therefore, the total on and off time of the high voltage device can be controlled to reduce the output equivalent dv/dt. The cell's voltage balancing can be achieved through a control algorithm disclosed herein.

Abstract: An isolated resonant converter is provided, including a first side circuit, a second side circuit, and a resonant tank circuit. The resonant tank circuit includes a first resonant capacitor, a second resonant capacitor, and an integrated magnetic element. The integrated magnetic element includes a first side winding, a second side winding and a spaced groove provided between the first side winding and the second side winding. And the spaced groove stores leakage inductance energy, thereby forming at least part of resonant inductance required. Therefore, a number and volume of magnetic elements in the resonant converter are reduced.

Abstract: A power module, including: a first conductor, disposed at a first reference plane; a second conductor, disposed at a second reference plane, wherein projections of the first and second conductors on the first reference plane have a first overlap area; a third conductor, disposed at a third reference plane; a plurality of first switches and a plurality of second switches, wherein at least one of the first switches and at least one of the second switches that are located on a left side are alternatively disposed, at least one of the first switches and at least one of the second switches that are located on a right side are alternately disposed, and the left side and the right side of the first overlap area are oppositely disposed. Heat sources of the power module are evenly distributed and its parasitic inductance is low.

Abstract: The present disclosure relates to the field of power electronics technology, and proposes a power module, including: a case and an isolating part disposed in the case; a first air duct and a second air duct stacked to each other, separated by the isolating part, and penetrated in a front-to-rear direction in the case; a high-voltage power unit; a low-voltage power unit; and a transformer, including a high-voltage portion and a low-voltage portion, wherein the high-voltage portion includes a first magnetic core and a high-voltage coil disposed on the first magnetic core, and the low-voltage portion includes a second magnetic core and a low-voltage coil disposed on the second magnetic core, wherein the high-voltage power unit and the high-voltage portion are disposed in the first air duct, and the low-voltage power unit and the low-voltage portion are disposed in the second air duct.

Abstract: The present disclosure provides a semiconductor chip including a functional area, a first end, a second end, a third end, and a connecting portion. The functional area has first and second sides opposite to each other. The first end is disposed on the first side and the third end is disposed on the first side, wherein the semiconductor chip is switched on or off according to the drive signal received between the third end and the first end, and the connecting portion is disposed on the first side of the functional area and connected to the first end and the third end, wherein when the temperature rises above the a first temperature, the connecting portion is in a conductive state, and when the temperature drops to be not higher than a third temperature, the connecting portion is in an insulated state.

Abstract: The present disclosure provides a heat dissipation structure for a magnetic component and a magnetic component having the same. The magnetic component includes a plurality of heat dissipation pins, which are disposed on the winding of the magnetic component, wherein the magnetic component has one or more windings. The heat dissipation structure includes a circuit board on which a plurality of heat dissipation channels are disposed, and the heat dissipation pins of the windings are in contact with the heat dissipation channels; a plurality of heat conduction portions are disposed correspondingly under the heat dissipation channels of the circuit board; a heat conduction layer is arranged under the heat conduction portions and contacts with the heat conduction portions; and a heat dissipation layer is arranged under the heat conduction layer and contacts with the heat conduction layer.