AC/DC POWER CONVERTING APPARATUS

摘要

A DC-to-AC electric power converting apparatus comprising: an inverter circuit having a plurality of switching elements and converting DC electric power into AC electric power; a transformer connected to the inverter circuit; a cyclo-converter circuit for converting the frequency of the output from the transformer; a carrier signal generator for generating a carrier signal of a predetermined frequency; an inverter switching circuit for controlling the switching operation of a plurality of the switching elements of the inverter circuit in synchronization with the carrier signal and switching a plurality of the switching elements of the inverter circuit in a period in which an electric current is not substantially passed through the inverter circuit; a reference voltage signal generating circuit for generating a reference voltage signal for the AC voltage to be transmitted from the cyclo-converter circuit; and a switching signal generating circuit for generating a control signal for controlling the cyclo-converter circuit in response to the reference voltage signal generated by the reference voltage signal generating circuit and the carrier signal generated by the carrier signal generator.