Power conversion device

摘要

With a power conversion device, it is possible to lengthen the lifespan of a mechanical switch by preventing an absorption by the mechanical switch of induction energy accumulated in a reactor when there is a problem. When a mechanical switch is turned off when there is a problem, an absorption by the mechanical switch of induction energy accumulated in a reactor is prevented by the energy accumulated in the reactor being released to a capacitor via a diode, thus enabling a lengthening of the lifespan of the mechanical switch.

主权项

1. A power conversion device, comprising:
a power semiconductor series circuit including a first power semiconductor switch and second power semiconductor switch connected in series; a capacitor connected in parallel to the power semiconductor series circuit; a reactor, of which one end is connected to a series connection point of the first power semiconductor switch and second power semiconductor switch; a first power diode, whose anode is connected to another end of the reactor and whose cathode is connected to a high potential side end of the power semiconductor series circuit; and a second power diode, whose cathode is connected to the other end of the reactor and whose anode is connected to a low potential side end of the power semiconductor series circuit.