A reactor includes a plurality of windings, a coupling core, and an inductor core. A coupling core configured to form a coupling closed magnetic circuit that magnetically couples the plurality of windings, the plurality of windings being wound around the coupling core; and. An inductor core, which includes a main part, a first projection part projecting from one end of the main part, and a second projection part projecting from another end of the main part, and each of the first projection part and the second projection part is magnetically connected to the coupling core. The inductor core forms an inductor closed magnetic circuit together with a part of the coupling core around which one winding of the plurality of windings is wound.

A voltage regulator module includes a circuit board, a positive input terminal, a negative input terminal, a positive output terminal, a negative output terminal, a switching circuit, a magnetic element and an input capacitor. The switching circuit is disposed on a top surface of the circuit board, and comprises two switches connected in series to form a midpoint, wherein the switching circuit is connected to the positive input terminal. The magnetic element comprises a magnetic core and a conductive structure in the circuit board, wherein the magnetic element and the switching circuit are arranged on the circuit board along a first direction, the conductive structure is connected to the midpoint of the corresponding switching circuit and the positive output terminal. The input capacitor is connected to the positive input terminal and the negative input terminal, and disposed on a bottom surface of the circuit board.

A voltage regulator module includes a circuit board, a positive input terminal, a negative input terminal, a positive output terminal, a negative output terminal, a switching circuit, a magnetic element and an input capacitor. The switching circuit is disposed on a top surface of the circuit board, and comprises two switches connected in series to form a midpoint, wherein the switching circuit is connected to the positive input terminal. The magnetic element comprises a magnetic core and a conductive structure in the circuit board, wherein the magnetic element and the switching circuit are arranged on the circuit board along a first direction, the conductive structure is connected to the midpoint of the corresponding switching circuit and the positive output terminal. The input capacitor is connected to the positive input terminal and the negative input terminal, and disposed on a bottom surface of the circuit board.

The power conversion device includes: a main circuit having first and second wiring layers formed respectively on both surfaces of a base board, mounted parts mounted on the first and second wiring layers, and first and second GND layers formed respectively, between external- and internal-layer portions of the base board and in regions corresponding to the mounted parts each being a mounted part which forms a circuit other than a circuit having an inductance component as a lumped constant, and to the first and second wiring layers; and a cooler attached to the base board by means of fixing screws through a first through-hole created in an end portion of the board; wherein the first and second GND layers are each formed so that creepage distance is created around a second through-hole in which a lead insertion part that mutually connects the first and second wiring layers is inserted.

A voltage generator includes: a sealed case having a ground potential; a high-voltage transformer that is housed in the sealed case and boosts a voltage; a booster circuitry that is housed in the sealed case and boosts a voltage outputted from the high-voltage transformer; and a voltage detector that is housed in the sealed case and detects a voltage boosted by the booster circuitry. A first creepage path ranging from a high-voltage portion, which is a portion to which a highest voltage is applied in the voltage detector, to a ground point having an equal potential to the sealed case includes a first bent path, which is a bent path.

A voltage generator includes: a sealed case having a ground potential; a high-voltage transformer that is housed in the sealed case and boosts a voltage; a booster circuitry that is housed in the sealed case and boosts a voltage outputted from the high-voltage transformer; and a voltage detector that is housed in the sealed case and detects a voltage boosted by the booster circuitry. A first creepage path ranging from a high-voltage portion, which is a portion to which a highest voltage is applied in the voltage detector, to a ground point having an equal potential to the sealed case includes a first bent path, which is a bent path.

A power converter configured to be connected to three or more voltage parts, includes three or more power-conversion circuitries to be connected to respective ones of the three or more voltage parts, and a multi-port transformer connected to the three or more power-conversion circuitries at respectively different ports. The three or more voltage parts include a vehicle drive battery and a plurality of alternating-current (AC) voltage parts. Each of the plurality of AC voltage parts is configured to provide at least one of power input to a multi-port transformer side and power output from the multi-port transformer side.

A method for regulating a temperature of a magnetron includes: determining an anode current flowing through the magnetron and an output power of a variable-frequency power supply, the output power being configured to drive the magnetron to operate; calculating an anode voltage of the magnetron according to the anode current of the magnetron and the output power of the variable-frequency power supply; calculating an anode temperature of the magnetron according to the anode voltage of the magnetron; and regulating the output power of the variable-frequency power supply according to the anode temperature of the magnetron.

A method for regulating a temperature of a magnetron includes: determining an anode current flowing through the magnetron and an output power of a variable-frequency power supply, the output power being configured to drive the magnetron to operate; calculating an anode voltage of the magnetron according to the anode current of the magnetron and the output power of the variable-frequency power supply; calculating an anode temperature of the magnetron according to the anode voltage of the magnetron; and regulating the output power of the variable-frequency power supply according to the anode temperature of the magnetron.

A power converter is provided. The power converter includes an input side having a first input winding and a second input winding coupled in electrical series to the first input winding. The power converter also includes an output side having a first output winding and a second output winding coupled in electrical parallel to the first output winding.