Harmonic Suppressipn for Six-phase Open-end Winding Permanent Magnet Synchronous Motor Space Vector Modulation Strategy

This paper presents a harmonic suppression space vector modulation strategy for a common DC-link bus six-phase open-end winding PMSM (Permanent Magnet Synchronous Motor) driving system. The method simplifies the modulation process by characterizing the voltage vector using the winding level states generated by the six-phase dual inverter. 141 vectors without common-mode voltage are screened as alternative vectors. Analyzing the proportionality of the projected amplitudes of each vector in different harmonic sub-planes and calculating the action period of each vector, a 12-sector 4-vector synthesized SVPWM strategy is established. This method can significantly suppress the 3rd, 5th, and 7th harmonic components of the current. The effection of the method is verified by simulation in comparison with the conventional SVPWM strategy.