Improved Space Vector Modulation Strategy for Dual-Channel Permanent Magnet Synchronous Motor

To meet with the application particularity of dual-channel permanent magnet synchronous motor (PMSM), this paper introduces an improved space vector modulation (SVM) strategy based on a novel synthesis mechanism of voltage vectors (VVs). Firstly, the novel synthesized VVs are presented where the dual power supplies are involved. Secondly, a comparative analysis of the proposed and traditional SVM strategies based on 12-sector is carried out. The concepts of duty cycle and modulation signal are emphasized instead of dwell time of nonzero VVs. The calculation burden is able to be effectively alleviated. Furthermore, the additional zero VVs injection are adopted to concentrate distribution of current harmonics as well as lower torque ripple with the merits of symmetrical modulation signals between dual channels. The simulation results verify the feasibility of the proposed strategy.