A new switching algorithm for an AC-AC converter with high frequency link

Abstract

In this paper, a Space Vector Modulation (SVM) based algorithm for a high frequency (HF) link based AC-AC converter is proposed. This converter has two stages-three phase low frequency AC to single phase high frequency AC and followed by a conversion to three phase variable voltage, variable frequency AC. The intermediate HF link offers possibility of galvanic isolation along with the option to step up the link voltage using a compact HF transformer. The presence of the AC link eliminates the need for the bulky DC link capacitor found in most AC-AC converter configurations. This converter is based on the matrix converter topology utilizing four quadrant switches. The algorithm for this converter along with the simulation and experimental results are included in this paper.