Modified Single-Stage Single-Phase to Multiphase Matrix Converter for Extended Low Output Power Frequency Operation

The practical applicability of the single-phase (1 & empty;) power supplied conventional single-stage matrix converter (SSMC) to synthesize multiphase (m & empty;) power is limited to very low frequency (3-5 Hz) output. In this article, a modified SSMC is proposed for 1 & empty; to m & empty; conversion which can extensively operate to derive the output frequency up to half of the rated supply frequency and ensures balanced operation with better power quality across the supply as well as load side. The proposed SSMC has three branches each constitute of an array of bidirectional switches supplied by a 1 & empty; source through a filter circuit of one inductor and two capacitors. This configuration of the proposed SSMC makes it suitable to synthesize m & empty; output from the available 1 & empty; power supply from very low output frequency to maximum frequency equals to half of the rated supply frequency while maintaining supply side unity power factor and standard voltage transfer ratio. Experimental results are presented to validate the performance of the proposed SSMC for 1 & empty; to m & empty; conversion.