Abstract: A current sampling system, the system including a magnetic component, that is an inductor or a transformer that has at least one winding, where the at least one winding has a first part and a second part, where a first terminal of the first part is connected to a first terminal of the second part, and where a second terminal of the first part is separated from a second terminal of the second part, and a current detection circuit, where the second terminal of the second part is connected to the current detection circuit, and where the current detection circuit is configured to sample a current flowing through the second part, and obtain a total current of the winding based on the sampled current flowing through the second part and a preset ratio.

Abstract: A power control circuit includes an alternating current power supply module, a power module, and a controller. The power module includes a bridgeless power factor correction circuit. A sampling apparatus in the alternating current power supply module samples a current signal output by an alternating current power supply or the power module, and outputs an obtained sampled signal to the controller. The controller controls on and off of a switch element in the alternating current power supply module based on the received sampled signal, and the controller switches off the switch element when the sampled signal includes a lightning surge signal. In addition, the controller is further configured to perform current metering on the sampled signal.

Abstract: The power distribution module includes a power busbar, a primary load output module, a secondary load output module, a battery module, and a signal-driven collection module, where each of the primary load output module, the secondary load output module, and the battery module includes a circuit breaker, the power busbar is connected to the circuit breaker, the signal-driven collection module is connected to the circuit breaker to collect a circuit breaker signal, the signal-driven collection module includes a plurality of first signal units sequentially arranged in a first direction, an integer quantity of first signal units are disposed in a connection area in which the signal-driven collection module is connected to each circuit breaker, each circuit breaker is provided with a second signal unit.

Abstract: A power conversion circuit and an electronic device. After circuit units that each are in a resonant circuit of the power conversion circuit, and that each include a resonant capacitor and/or a resonant inductor, are connected in series in a triangle connection. When it can be ensured that the circuit units connected in series in the triangle connection and the circuit units connected in series in a star connection relationship provide a same resonant frequency, a capacitance value of the resonant capacitor is reduced, and/or current stress of the resonant capacitor and/or current stress of the resonant inductor are/is reduced.

Abstract: The power distribution module includes a power busbar, a primary load output module, a secondary load output module, a battery module, and a signal-driven collection module, where each of the primary load output module, the secondary load output module, and the battery module includes a circuit breaker, the power busbar is connected to the circuit breaker, the signal-driven collection module is connected to the circuit breaker to collect a circuit breaker signal, the signal-driven collection module includes a plurality of first signal units sequentially arranged in a first direction, an integer quantity of first signal units are disposed in a connection area in which the signal-driven collection module is connected to each circuit breaker, and each circuit breaker is provided with a second signal unit.

Abstract: A power distribution system includes a backplane communication busbar and a circuit breaker. The backplane communication busbar includes at least one slot, and a first interface is configured in each slot. Each first interface is connected to a first resistor R1 having a different resistance value. A second interface of each circuit breaker is connected to a second resistor R2, and when the second interface of the circuit breaker is plugged in any first interface, a preset voltage interval corresponding to a resistance value of the first resistor R1 is uniquely determined by using a series circuit including the first resistor R1 and the second resistor R2.

Abstract: A magnetic sensor includes a printed circuit board and a tunnel magneto-resistance element. The printed circuit board includes a target trace. When the tunnel magneto-resistance element is installed, the tunnel magneto-resistance element is installed right above or right below the target trace, and a ratio of a distance D between a detection unit in the tunnel magneto-resistance element and an edge on a side of the target trace closest to the tunnel magneto-resistance element to a width W of the target trace is between 3.0% and 20.0%.

Abstract: A charging module includes an AC-DC circuit, a first DC-DC circuit, and a first direct current transmission circuit. A first end of the AC-DC circuit is connected to an alternating current grid, a second end is connected to a first end of the first DC-DC circuit through a high-voltage direct current bus, and a second end of the first DC-DC circuit is connected to a to-be-charged apparatus. A second end of the first direct current transmission circuit is configured to connect to an external direct current apparatus.

Abstract: A current detection apparatus includes a magnetic sensor, configured to sense a magnetic field change of a to-be-tested current path, and convert the magnetic field change into an electrical signal; and a magnetically conductive unit, including a magnetically conductive material. The magnetically conductive unit is disposed on at least one of the following positions: a left side of the magnetic sensor, a right side of the magnetic sensor, and an upper side of the magnetic sensor, and the left side and the right side of the magnetic sensor are a left side and a right side of the magnetic sensor along the to-be-tested current path.

Abstract: A charging system may include a plurality of power modules, a distributing switch module, and a plurality of charging ports. The distributing switch module includes a first distributing unit and a second distributing unit. The first distributing unit may connect a first part of power modules in the plurality of power modules to a first charging port, to distribute powers of the first part of power modules to the first charging port. The second distributing unit may connect a second part of power modules in the plurality of power modules to a second charging port, to distribute powers of the second part of power modules to the second charging port. Therefore, the first charging port may charge a first terminal, and the second charging port may charge a second terminal.

Abstract: A reverse power connection preventing circuit includes a diode and an actuation unit that are connected in series between a positive input terminal and a negative input terminal of a circuit breaker. A positive electrode of the diode points to the negative input terminal of the circuit breaker, and a negative electrode of the diode points to the positive input terminal of the circuit breaker. When a power supply is forward connected to the circuit breaker, the diode is cut off, there is no current on the actuation unit, and the reverse power connection preventing circuit is in a power-off state. When the power supply is reversely connected to the circuit breaker, the diode conducts, and the actuation unit is configured to prevent closing of the circuit breaker, and/or the actuation unit is configured to perform an alarm prompt, to perform an early warning.

Abstract: Embodiments of this application provide a power supply method and apparatus, an electronic device, and a readable storage medium. The method includes: determining whether a current power grid is a weak power grid; if the current power grid is a weak power grid, determining a target current limit value based on an actual input voltage of a power system; and supplying power to a load based on the target current limit value. The power system may adaptively adjust a current limit value of the power system based on an input voltage, so as to supply power to the load while avoiding undervoltage in the power system.

Abstract: A current sampling system, the system including a magnetic component, that is an inductor or a transformer that has at least one winding, where the at least one winding has a first part and a second part, where a first terminal of the first part is connected to a first terminal of the second part, and where a second terminal of the first part is separated from a second terminal of the second part, and a current detection circuit, where the second terminal of the second part is connected to the current detection circuit, and where the current detection circuit is configured to sample a current flowing through the second part, and obtain a total current of the winding based on the sampled current flowing through the second part and a preset ratio.

Abstract: A matrix transformer, a power converter, and a matrix transformer winding arrangement method. Each of the magnetic core columns of n sub-transformers of the matrix transformer is wound with a first winding and a second winding, first windings are used to form a high-voltage-side winding of the matrix transformer, and second windings are used to form a low-voltage-side winding of the matrix transformer. A ratio of a turn quantity design value of the high-voltage-side winding to the quantity n of the sub-transformers is not an integer.

Abstract: A resonant converter and a voltage conversion method. The resonant converter includes a high-frequency inversion circuit, an inductor-inductor-capacitor (LLC) resonant tank network, and a hybrid rectification circuit. The LLC resonant tank network is separately coupled to the high-frequency inversion circuit and the hybrid rectification circuit. The high-frequency inversion circuit is configured to convert a first direct current voltage into a first alternating current voltage. The LLC resonant tank network is configured to adjust the first alternating current voltage to obtain a second alternating current voltage.

Abstract: The power distribution module includes a power busbar, a primary load output module, a secondary load output module, a battery module, and a signal-driven collection module, where each of the primary load output module, the secondary load output module, and the battery module includes a circuit breaker, the power busbar is connected to the circuit breaker, the signal-driven collection module is connected to the circuit breaker to collect a circuit breaker signal, the signal-driven collection module includes a plurality of first signal units sequentially arranged in a first direction, an integer quantity of first signal units are disposed in a connection area in which the signal-driven collection module is connected to each circuit breaker, and each circuit breaker is provided with a second signal unit.

Abstract: A reverse power connection preventing circuit includes a diode and an actuation unit that are connected in series between a positive input terminal and a negative input terminal of a circuit breaker. A positive electrode of the diode points to the negative input terminal of the circuit breaker, and a negative electrode of the diode points to the positive input terminal of the circuit breaker. When a power supply is forward connected to the circuit breaker, the diode is cut off, there is no current on the actuation unit, and the reverse power connection preventing circuit is in a power-off state. When the power supply is reversely connected to the circuit breaker, the diode conducts, and the actuation unit is configured to prevent closing of the circuit breaker, and/or the actuation unit is configured to perform an alarm prompt, to perform an early warning.

Abstract: A power distribution system includes a backplane communication busbar and a circuit breaker. The backplane communication busbar includes at least one slot, and a first interface is configured in each slot. Each first interface is connected to a first resistor R1 having a different resistance value. A second interface of each circuit breaker is connected to a second resistor R2, and when the second interface of the circuit breaker is plugged in any first interface, a preset voltage interval corresponding to a resistance value of the first resistor R1 is uniquely determined by using a series circuit including the first resistor R1 and the second resistor R2.