Research on vector space decomposition SVPWM for 7-phase inverter with DSP28335

The seven-phase adjustable speed drive system has drawn more attention because of its typical open – phase fault operation in recent years. Based on the DSP TMS320F28335 and the SVPWM of three-phase voltage source inverter,three kinds of SVPWM of 7-phase voltage source inverter are proposed in this paper. The control strategy,realization process and harmonic elimination analysis is verified by simulation and experiment results respectively. The current has a plenty of harmonic content in SVPWM I; with the space decompsition,the compsitive vector in 3rd and 5th harmonic subspace has been reduced remarkably,and the 3rd harmonic content and 5th harmonic content has been eliminated in SVPWM II and SVPWM III. And these SVPWM methods based on DSP28335 could be easily used in other m( odd number)-phase system.