A direct space vector modulation method for three-phase AC to single-phase AC isolated matrix converter

Abstract

This paper proposes a direct space vector modulation of a three-phase AC to single-phase AC isolated matrix converter. In order to introduce the direct space vector modulation, this paper discusses the relationship between high frequency square wave of the single-phase side and an equivalent circuit of the matrix converter. In addition, this paper introduces both of the buck type and boost type of three-phase AC to single-phase AC isolated matrix converter. In the buck type matrix converter, switching number increases due to the changing of zero vectors when the input current reference vector moves to the next sector. This paper discusses optimized switching pattern for the buck type matrix converter in order to reduce the switching number. The proposed space vector modulation method is confirmed by the simulation results.