CASCADED MULTILEVEL AC-AC CONVERTER

摘要

A cascade multilevel AC-AC converter is disclosed. The cascade multilevel AC-AC converter comprises: multiple single-phase AC-AC converters, each of which includes two switch pairs and a coupling inductor; and a control unit which controls each switch in the single-phase AC-AC converters to perform an alternating current signal converting operation, wherein each of the single-phase AC-AC converters forms a current path from a power supply to a ground through the coupling inductor in a switching state where the two switch pairs are turned on or off.