Full space vectors modulation for nine-switch converters including CF & DF modes

Abstract

Recently, nine-switch inverter was presented as a dual output inverter. Two constant frequency (CF) and different frequency (DF) modes are defined for nine-switch inverter. However CF mode is more interesting because of lower inverter ratings. Several switching methods have been presented for nine switch converter. A space vector modulation algorithm has already been proposed by authors for DF mode. This paper proposes a full space vector modulation (SVM) for both CF and DF modes. The practical implementation method of the proposed SVM is presented in the paper. Also a specific SVM is proposed that minimizes total harmonic distortion (THD) in DF mode. The performance of the proposed SVM is verified by simulation and results.