Multiphase Inverter Topology and its Modulation Technique for Optimal Harmonic Output

Space vector pulse width modulation (SVPWM) technique is being increasingly used because of its easy digital implementation. Multiphase load like six-phase motor drive is an active area of research and industrial applications, but very less work has been done on multiphase inverters. In this paper a six-phase inverters circuit has been taken as a representative problem of multiphase inverters to investigate the best converter topology and its modulation technique such that output has minimum or optimal. This paper presents implementation of SVPWM technique to a six-phase inverter using unified approach. Simulation results are provided to validate the proposed theory. It has been found that a three-phase space vector based inverter topology has better THD than a six phase topology.