POWER CONVERSION MODULE

摘要

According to one embodiment, a power conversion device includes a first switch serially connected to a second switch, a first diode serially connected to a second diode, the first switch and the first diode connected to the second switch and the second diode, an AC power supply and an inductor serially connected to a connection point between the first switch and the second switch and a connection point between the first diode and the second diode, a capacitor serially connected to ends of the first diode and the second diode connected, and a potential difference between the ends of the capacitor is used as an output voltage. The control unit supplies a pulse signal to the first switch and the second switch to provide a sinusoidal current through the AC power supply, based on a detected power supply voltage, a detected circuit current, and a detected capacitor voltage.

主权项

1. A power conversion device comprising:
a power conversion circuit in which a first switch is connected in series to a second switch, a first diode is connected in series to a second diode to form a serial connection, a closed loop is formed by connecting the first switch to the first diode and the second switch to the second diode respectively, a serially-connected AC power supply and first inductor is connected to a connection point between the first switch and the second switch and to a connection point between the first diode and the second diode, a capacitor is connected to both ends of the serial connection of the first diode and the second diode, and a potential difference between two ends of the capacitor is used as an output voltage; and a control unit that supplies a pulse signal which alternately turns on and off the first switch and the second switch according to polarity of the AC power supply so that a sinusoidal wave current synchronous with a voltage phase of the AC power supply flows through the AC power supply, based on a detected value of a power supply voltage that is obtained by a unit detecting a voltage of the AC power supply, a detected value of a circuit current that is obtained by a unit detecting a current which carries electric charges to the capacitor of the power conversion circuit, and a capacitor voltage detected value that is obtained by a unit detecting a smoothing voltage of the capacitor.