An Analysis Method of AC-AC Direct Converters by Using Switch Matrix

Abstract

This paper proposes an analysis method of AC-AC direct converters which are Matrix converter et, al.. The proposed analysis method, is described by a switch matrix and instantaneous space vectors of the input voltage and the output voltage, is uniformly able to analyze the characteristics of the AC-AC direct converters, because the output voltage range and the controllability of input current are clearly defined. In addition, a novel circuit was invented by using the proposed analysis method. The novel circuit, called Delta converter, realizes VVCF operation and high input power factor regardless of load power factor.
In this paper, the proposed analysis method is applied to five types of the AC-AC direct converters and the features of each circuits are compared and discussed.