Abstract: The present application provides a primary-side current sensing unit applied to a transformer-based power converter; the primary-side current sensing unit is implemented by selecting a full-bridge circuit as the primary-side circuit and combining it with a current sensing unit located in the primary-side of the transformer. The current information during the conduction time of the primary-side switches is detected through a current sampling unit. On the other hand, a prediction unit is added to the current sensing unit to predict the current information during the turn-off time of the primary-side switches.

Abstract: A magnetic device includes a magnetic core assembly and a winding assembly. The magnetic core assembly includes a first magnetic cover, a second magnetic cover and a plurality of magnetic legs. The second magnetic cover has a perforation. The plurality of magnetic legs are disposed between the first magnetic cover and the second magnetic cover. A middle region is defined by the plurality of magnetic legs, the first magnetic cover and the second magnetic cover. The middle region is in communication with the perforation. The middle region includes a plurality of communication portions. The winding assembly includes at least one coupled winding pair. In addition, two coupled windings of each coupled winding pair are respectively transferred through two different communication portions, and portions of the two coupled windings of each coupled winding pair are penetrated through the perforation of the second magnetic cover.

Abstract: The present application provides a power conversion apparatus, which includes a plurality of power sub-circuits. By adding auxiliary windings, coupling the high-voltage winding, the low-voltage winding, and the auxiliary winding in the same power sub-circuit on a single magnetic core to form a magnetic component, and connecting the auxiliary windings or the low-voltage windings of the power sub-circuits in series to form a closed loop, the power conversion circuit can ensure steady-state performance while also satisfying dynamic-performance requirements.

Abstract: A magnetic device includes a magnetic core assembly, a primary winding, a first secondary winding, at least one second secondary winding and an auxiliary winding. The magnetic core assembly includes a first magnetic leg, a second magnetic leg and a third magnetic leg. The primary winding is wound around the second magnetic leg. The at least one secondary winding is wound around the second magnetic leg or the third magnetic leg. The auxiliary winding is electrically connected with an auxiliary inductor and wound around at least one magnetic leg. The primary winding is electrically connected with a first switch circuit, and the at least one secondary winding is electrically connected with a second switch circuit, wherein when switches of the first switch circuit turn off and switches of the second switch circuit turn on, an superposed AC voltage coupled by the auxiliary winding is applied on the auxiliary inductor.

Abstract: The present application relates to air conditioning technology and motor control technology, and in particular to a motor drive system for a chiller unit, a chiller unit comprising the motor drive system, a control method for a chiller unit, and a computer-readable storage medium on which is stored a computer program for implementing the method. A motor drive system for a chiller unit according to an aspect of the present application comprising: a variable frequency drive unit configured to drive a first motor; a power frequency drive unit configured to drive a second motor; and a control unit configured to adapt a load demand of the chiller unit by controlling output power of the variable frequency drive unit and the power frequency drive unit.

Abstract: A magnetic element includes a magnetic core, at least one excitation winding and an auxiliary winding. The magnetic core includes at least one first magnetic leg, a second magnetic leg and a third magnetic leg. Each of the at least one magnetic leg is wound with an excitation winding, wherein a vector sum of magnetic flux passing through each of the at least one first magnetic leg is a first magnetic flux, a second magnetic flux is passing through the second magnetic leg, and a third magnetic flux is passing through the third magnetic leg. The auxiliary winding is partially or completely wound on the second magnetic leg, wherein the auxiliary winding is used to clamp the second magnetic flux.

Abstract: A power conversion device including an input positive terminal, an input negative terminal, an output positive terminal, an output negative terminal, a high-voltage circuit, and a low-voltage circuit is provided. The input negative terminal and the output negative terminal are short-circuited. The high-voltage circuit and the low-voltage circuit are connected to a connection point. The high-voltage circuit is connected across the input positive terminal and the connection point, and the low-voltage circuit is connected across the connection point and the output negative terminal. The power conversion device further comprises a first control signal, a second control signal, a third control signal and a fourth control signal. The first control signal and the second control signal are 180 degrees phase-shift, the third control signal is complementary to the first control signal, and the fourth control signal is complementary to the second control signal.

Abstract: The present application discloses a power conversion circuit with high power requirements. The primary-side circuit uses two groups of full-bridge circuits or half-bridge circuits in parallel architecture, and the secondary-side circuit uses N synchronous rectifier units and N inductors, N is a natural number of multiples of 4; by adding the auxiliary winding coupled to the inductor, the N auxiliary windings and the series inductor are connected in series to form a closed loop, so as to obtain higher conversion efficiency and power density, and improve the response capability to rapid transition of the load. On the other hand, the present application provides a power conversion device, which reduces the volume of the power conversion device by means of the component arrangement and a winding manner and structure design of a transformer assembly and an inductor assembly, thereby improving the load dynamic performance of the power conversion device.

Abstract: A power module comprises a first circuit board assembly and a magnetic core assembly. The first circuit board assembly comprises a first printed circuit board and at least two switch circuits disposed on the first printed circuit board. The magnetic core assembly is disposed near the first printed circuit board and comprises a magnetic core portion and at least a pair of first electrical conductors. The magnetic core portion comprises at least a core unit, the core unit comprises a pair of holes and a second magnetic overlapping region, and the pair of holes are separated by the second magnetic overlapping region. Each pair of the first electrical conductors is penetrated through the corresponding pair of holes of the magnetic core portion to define two output inductors. Each of the switch circuits is electrically connected with the corresponding output inductor to define a phase circuit of the power module.

Abstract: The present application is directed to a power conversion device, comprising a switch element, a magnetic core, a first substrate and a second substrate, wherein the magnetic core is assembled to the second substrate, and the switch element is disposed on the upper surface of the first substrate.

Abstract: A power conversion apparatus including a full-bridge circuit, two magnetic cores, and four synchronous rectification circuits is provided. The full-bridge circuit comprises two upper switches, two middle switches, a resonant capacitor, a first high-voltage winding and a second high-voltage winding; each of the synchronous rectification circuits comprises a first lower switch, a second lower switch, a first low-voltage winding and a second low-voltage winding; and further comprising an input terminal and an output terminal, wherein the input terminal comprises an input positive terminal and a GND terminal, and the output terminal comprises an output positive terminal and a GND terminal.

Abstract: The present invention discloses a power supply module and a vertical power delivery system. The power supply module comprises a large-area pin board, a control module, a plurality of power blocks, a plurality of input capacitors, and a plurality of output capacitors. The controller is vertically connected to the pin board by means of a first side surface or a third side surface, so as to realize electrical connection. In the present invention, the controller is placed vertically, and as many power blocks are provided in a limited space in the power supply module, the power density or conversion efficiency of the power supply module is improved.

Abstract: A magnetic element includes a magnetic core, at least one excitation winding and an auxiliary winding. The magnetic core includes at least one first magnetic leg, a second magnetic leg and a third magnetic leg. Each of the at least one magnetic leg is wound with an excitation winding, wherein a vector sum of magnetic flux passing through each of the at least one first magnetic leg is a first magnetic flux, a second magnetic flux is passing through the second magnetic leg, and a third magnetic flux is passing through the third magnetic leg. The auxiliary winding is partially or completely wound on the second magnetic leg, wherein the auxiliary winding is used to clamp the second magnetic flux.

Abstract: The present invention provides a circuit connection mode for a power conversion device, which can meet requirements of different gain ratios of input and output voltages and application scenarios of various output powers. Furthermore, with a simple magnetic core structure, a winding manner is provided, thereby further reducing the volume and loss of the magnetic assembly, and improving the power density of the power conversion device.

Abstract: An apparatus includes a heat-dissipating substrate, a power circuit and a magnetic assembly. The heat-dissipating substrate includes a thermal contact surface. The power circuit includes at least one switch element in contact with the thermal contact surface of the heat-dissipating substrate. The magnetic assembly includes at least one first electrical conductor and a magnetic core module comprising at least one hole, wherein the at least one first electrical conductor passes through the at least one hole, and a terminal of the at least one first electrical conductor is electrically connected to the at least one switch element. The heat-dissipating substrate, the power circuit and the magnetic assembly are arranged in sequence along a same direction. A projection of the power circuit on the thermal contact surface partially overlaps a projection of the magnetic assembly on the thermal contact surface.

Abstract: The present application provides a module structure with high efficiency and good heat dissipation performance, which improves the heat dissipation capability of the VRM module by means of the design of the self-contained heat sink, so as to improve the output power of the VRM module; by means of the device placement in the VRM module, the parasitic parameters on the power transmission path are reduced, and the conversion efficiency of the VRM module is improved; and the dynamic performance of the VRM module is further improved by means of the TLVR technology.

Abstract: A high-power power conversion device includes: a first high-voltage sub-circuit, a second high-voltage sub-circuit, a first low-voltage sub-circuit, a second low-voltage sub-circuit, an input positive terminal, an input negative terminal, an output positive terminal, and an output negative terminal. Under the condition that high-power output is met, the volume and loss of the high-power power conversion device are further reduced, and a steady-state performance and a dynamic performance of the high-power power conversion device are improved. A voltage equalization control scheme is also provided to achieve voltage equalization between the two high-voltage sub-circuits.

Abstract: A power conversion module includes a first bridge arm, a second bridge arm, a transformer and a rectifying circuit. An output positive terminal and an output negative terminal are electrically connected with a low-voltage and high-current load. The first bridge arm and the second bridge arm are electrically connected between an input positive terminal and an input negative terminal. The transformer includes a primary winding, a first secondary winding and a second secondary winding. The two terminals of the primary winding are electrically connected with a midpoint of the first bridge arm and a midpoint of the second bridge arm. An output inductor of the rectifying circuit is electrically connected between the winding midpoint and the output positive terminal. The input voltage is higher than 40V. The output voltage is lower than or equal to 2.2V.

Abstract: The application discloses a circuit topology and a control method for a high-power application of an input voltage to an output voltage with a high step-down ratio; the circuit topology has a low switching loss and a high conversion efficiency in a high-frequency switching occasion. The present application further provides a power conversion device using the circuit topology, which provides a device layout setting of the power conversion device and a winding mode of the transformer. Under the condition that high-power output is met, the volume of the power conversion device is further reduced, and the steady-state performance and dynamic performance of the conversion device are improved.

Abstract: The present application is directed to a power conversion device, which further reduces the thickness and volume of the power conversion device by optimizing the layout structure and winding method of the power conversion device. On the other hand, by optimizing the control/driving mode, the four control signals are used to realize low-loss driving control of the plurality of switches.