POWER CONVERTER

摘要

A motor drive system in which an LC circuit is present between an inverter (2) and a motor (4) performs switching control on semiconductor switching elements (Su to Sw, Sx to Sz) constituting the inverter (2) by using a first ON signal, a second ON signal and an ON signal between these signals having an OFF period of the same time period as the first ON signal, and a first OFF signal, a second OFF signal and an OFF signal between these signals having an ON period of the same time period as the first OFF signal so that the time period of the first ON signal and the time period of the second OFF signal become 1/6 of the specific resonant period of the LC circuit to suppress surge voltage applied to an input terminal of the motor (4).