Abstract: A direct current charging apparatus, a powertrain, and an electric vehicle. The direct current charging apparatus which includes a direct current charging interface, a switch module, and a direct current voltage conversion module is configured to charge power battery of the electric vehicle. The direct current charging interface is configured to connect a positive electrode and a negative electrode of a power supply apparatus and a positive electrode and a negative electrode of the power battery to form a charging loop. The switch module is configured to connect or disconnect the charging loop. The direct current voltage conversion module is configured to output a preset direct current voltage to the positive electrode and the negative electrode of the power supply apparatus. When the charging loop between the power battery and a charging pile is connected again, charging can be resumed without re-swiping card/re-scanning QR code.

Abstract: A power conversion apparatus includes an AC-DC conversion circuit, a power controller, and a circulating current controller. The power controller is configured to control the AC-DC conversion circuit to convert a received alternating current into a first direct current and output the first direct current. The circulating current controller is configured to send a synchronization signal to another power conversion apparatus through a controller area network (CAN) bus. The synchronization signal is used to synchronize a carrier of the another power conversion apparatus with a carrier of the power conversion apparatus.

Abstract: A hybrid bond sheet for mounting a semiconductor power module to a heat sink includes a thermally conductive core layer having an upper main face and a lower main face; a first bond layer formed at the upper main face of the core layer for bonding the hybrid bond sheet to a semiconductor power module; and a second bond layer formed at the lower main face of the core layer for bonding the hybrid bond sheet to a heat sink; where the core layer is subdivided into a plurality of core metal sections and core polymer sections which are formed side-by-side between the upper main face and the lower main face, the subdivided core metal sections being configured to enable a uniform heat transfer between the semiconductor power module and the heat sink and to reduce thermal stress at interfaces between the hybrid bond sheet and the heat sink.

Abstract: A converter and a control method of sending a pulse width modulation (PWM) driver gating signal thereof. When an alternating current voltage output by the converter is in an O area, the converter may be controlled to switch between an upper half-bridge arm straight-through mode and a lower half-bridge arm straight-through mode. In this way, it can be ensured that there is a freewheeling path for a current in an inductive component, and a problem that a switching transistor of a secondary-side circuit is in a straight-through state is avoided.

Abstract: The multi-temperature control cabinet includes a cabinet body, a cabinet door, and a refrigerating system. The refrigerating system includes at least one air conditioner, at least one direct ventilation unit, and an environment monitoring apparatus. Both the air conditioner and the direct ventilation unit are disposed on the cabinet door, and the air conditioner and the direct ventilation unit are disposed in parallel in a height direction of the cabinet door. An air guide assembly is disposed between the direct ventilation unit and an air exhaust vent of the air conditioner. The environment monitoring apparatus is connected to both the air conditioner and the direct ventilation unit, and the environment monitoring apparatus is configured to monitor temperature and humidity in the cabinet body, and control turning-on and turning-off of the air conditioner and the direct ventilation unit based on the temperature and the humidity in the cabinet body.

Abstract: An AC/DC converter stage for a converter system with an input series structure. The AC/DC converter stage includes two input terminals for inputting an AC input voltage and at least a first circuit branch with at least two switches that are electrically connected in series at a first connection point, where a first input terminal of the two input terminals is electrically connected to the first connection point of the first circuit branch. At least one first electrical storage provides a DC output voltage and is electrically connected in parallel to the first circuit branch. At least one controllable bidirectional switch is electrically connected between the two input terminals.

Abstract: A semiconductor device includes a drain, a substrate, an epitaxial layer, and a semiconductor layer. The semiconductor layer includes a source region located on a side the semiconductor layer away from the epitaxial layer. A trench extending to the epitaxial layer is disposed on a side of the source region is away from the epitaxial layer. A gate, an electrode plate, a first shield gate, and a second shield gate are disposed in the trench. The electrode plate is located between the first shield gate and the second shield gate. The trench is further filled with an oxidized layer structure. The first shield gate and the second shield gate are separately spaced from the electrode plate to form electrode plate capacitance. One of the source region, the drain, and the gate is electrically connected to the electrode plate a first electrode, and a second one of the source region, the drain, and the gate is electrically connected to the shield gate structure.

Abstract: A stator, a motor, a powertrain, and a mechanical device. The stator includes a stator core, a coil winding, a first end plate, and a second end plate. The stator core includes a plurality of gaps extending along an axial direction, to form first coolant flow channels. The first coolant flow channel communicates with a liquid inlet region of the stator core. End faces of two ends of the stator core along the axial direction are respectively a first end face and a second end face. The first end plate is mounted on the first end face, and the second end plate is mounted on the second end face. A second coolant flow channel is formed between the first end plate and the first end face. A quantity of fittings of the motor is small, a leakage risk is low, and heat dissipation effect is good.

Abstract: An uninterruptible power supply. A rectifier of the uninterruptible power supply includes six first rectifier diodes, six second rectifier diodes, three alternating current side relays, six direct current side relays, a DC/DC conversion unit, and a controller. The other end of each alternating current side relay is connected to anodes of two first rectifier diodes, and cathodes of the two first rectifier diodes are respectively connected to two phases of positive input ends of the DC/DC conversion unit. The other end of each alternating current side relay is further connected to cathodes of two second rectifier diodes, and anodes of the two second rectifier diodes are respectively connected to two phases of negative input ends of the DC/DC conversion unit.

Abstract: This application provides an uninterruptible power supply. An input end of the uninterruptible power supply is connected to a power supply by using a first on-off control module. A controller of the uninterruptible power supply is configured to: after receiving a first control signal sent by the first on-off control module, control a current in a circuit connecting the uninterruptible power supply and the first on-off control module to be zero. An output end of the uninterruptible power supply is connected to a load by using a second on-off control module. A controller of the uninterruptible power supply is configured to: after receiving a second control signal sent by the second on-off control module, control the uninterruptible power supply to be turned off.

Abstract: A communication power supply system includes an alternating current power distribution module, a rectifier module, a monitoring module, a direct current power distribution module, and a signal-driven collection board. The monitoring module sends a control signal to the direct current power distribution module by using the signal-driven collection board, where the control signal is used to control the closing or opening of a circuit in the direct current power distribution module. The communication power supply system uses the monitoring module to control the direct current power distribution module, to control whether to power on the loads connected to the direct current power distribution module.

Abstract: An energy storage system includes at least two power conversion systems PCSs, output terminals of the at least two PCSs are connected in parallel to connect to an alternating current power grid, and input terminals of the at least two PCSs are connected to an energy storage power supply. The first PCS is any one of the at least two PCSs. The voltage detection circuit detects a power grid voltage at a parallel connection point of the output terminals of the at least two PCSs. When determining, based on the power grid voltage at the parallel connection point, that islanding occurs in the alternating current power grid, the controller adjusts an angle of an output voltage of the first PCS to a reference angle, so that angles of output voltages of the at least two PCSs are the same.

Abstract: A converter includes a power conversion circuit, a switching device, and a controller, and includes N phases, where N is 2 or 3. An input end of the power conversion circuit is connected to a direct current power supply, and the power conversion circuit converts a direct current output by the direct current power supply into an alternating current. The switching device includes at least the following two stages: a first-stage switching device and a second-stage switching device. The first-stage switching device and the second-stage switching device separately include N switches, and the N switches are connected in series to the N phases respectively. An output end of the power conversion circuit is connected to an alternating current power grid through the first-stage switching device and the second-stage switching device that are connected in series.

Abstract: An electrically excited motor drive system is integrated with an on-board charger (OBC), so that a power supply circuit that is in an electric vehicle and that is configured to drive an electrically excited motor can be integrated with an OBC of a dual active bridge (DAB) type. When a control component controls a switch circuit, the electrically excited motor drive system obtained after integration can separately implement a function of the power supply circuit or a function of the charging circuit in different working modes. In addition, when the electrically excited motor drive system is in different working modes, some circuits are further reused through time division. This addresses a problem that the power supply circuit cannot be integrated with the OBC of the DAB type, to reduce circuit complexity and costs of the electric vehicle.

Abstract: The power distribution component is configured to connect to a power distribution box in a pluggable manner. A main body is provided with a first power terminal, a signal terminal, and a second power terminal that are arranged along a first direction. The first power terminal is configured to electrically connect to a first power busbar of the power distribution box, the signal terminal is configured to electrically connect to a signal busbar of the power distribution box, and the second power terminal is configured to electrically connect to a second power busbar of the power distribution box. Polarities of the first power terminal and the second power terminal are opposite. An end, facing away from the main body, of the mistake proofing structure is provided with an abutting surface, configured to abut against the signal busbar when the power distribution component is reversely inserted into the power distribution box.

Abstract: A semiconductor device and a semiconductor device manufacturing method. The semiconductor device includes: a substrate; an epitaxial layer, located on one side of the substrate, where a doped region is formed on a surface that is of the epitaxial layer and that is away from the substrate, and the epitaxial layer includes an active region and a termination region that surrounds the active region; a passivation layer, covering the termination region and on which a window corresponding to the active region is formed; and a metal layer, covering the window and an inner edge that is of the passivation layer and that forms the window, and forming a schottky contact with the active region in the window.

Abstract: A photovoltaic inverter and a temperature detection apparatus. The photovoltaic inverter includes a plurality of photovoltaic terminals, a converter, a printed circuit board (PCB), a temperature detection circuit, and a controller. The plurality of photovoltaic terminals are correspondingly connected to a plurality of photovoltaic modules. The PCB includes an electrically conductive layer and at least one thermally conductive insulation layer. One end of each photovoltaic terminal is soldered on the PCB, and the other end is connected to a corresponding photovoltaic module in a thermally conductive manner. The electrically conductive layer transmits electric energy generated by the plurality of photovoltaic modules to the converter. Each thermally conductive insulation layer conducts heat generated by at least one photovoltaic terminal. The temperature detection circuit detects a temperature of each thermally conductive insulation layer.

Abstract: Embodiments of this application disclose a power supply apparatus, a power supply system, and a data center designed to reduce the number of power conversion steps, equipment costs, and circuit loss. The power supply apparatus includes: a solid-state transformer configured to convert an alternating current into a first direct current; a first direct current/direct current converter, coupled to the solid-state transformer and configured to convert the first direct current into a second direct current; an energy storage component, coupled to the first direct current/direct current converter and configured to perform energy storage on the second direct current; and a second direct current/direct current converter, coupled to the first direct current/direct current converter and configured to convert the second direct current into a third direct current, where the third direct current is used to supply power to a load.

Abstract: A contact apparatus includes a fixed contact and a moving contact component. The moving contact component includes a push rod, a contact bracket, an insulated sleeve, a moving contact, and a contact spring. The insulated sleeve is fixedly sleeved on a first end of the push rod, a second end of the push rod is configured to connect a drive apparatus, the contact bracket is fixedly sleeved on the insulated sleeve, the moving contact and the contact spring are both flexibly sleeved on the insulated sleeve, the contact spring elastically abuts between the moving contact and the contact bracket, the moving contact and the fixed contact are disposed relative to each other in an extension direction of the push rod, and the moving contact can be driven by the push rod to be connected to the fixed contact.

Abstract: Embodiments of this application provide a magnetic element and an electronic device. The magnetic element is used in an electronic device. The magnetic element includes a composite magnetic core and a winding. The composite magnetic core includes an external magnetic shell and an internal magnet. The internal magnet is formed by a wound strip material. The external magnetic shell partially or entirely covers a periphery of the internal magnet. The external magnetic shell is fixedly connected to the internal magnet. The winding is on an outer surface of the external magnetic shell. The external magnetic shell is configured to protect the internal magnet from pulling force in a winding process of the winding. The external magnetic shell is configured to increase common-mode impedance of the magnetic element and improve a filtering effect of the magnetic element.