Common-Mode Voltage Minimization in Three-Phase to Six-Phase Indirect Matrix Converter Using Virtual Vector Synthesization

This article presents the reduction in common mode voltage (CMV) in a three-phase to six-phase indirect matrix converter feeding power to a six-phase load using space vector modulation technique based on virtual vector synthesization. From the total available 64 vectors, 6 virtual vectors are derived to develop a switching algorithm giving an effective reduction in CMV for symmetrical (
60°
) six-phase system. The voltage transformation ratio is maintained maximum possible from the presented switching algorithm. This three-phase to six-phase conversion system maintains unity power factor across the three-phase supply side, hence no reactive power is drawn from the supply. This complex control is implemented using two conjunct processors controlled in a master and slave manner. Simulation, as well as hardware, results are presented to validate the proposed control technique.