High-Frequency Current Harmonic Analysis and Suppression in Dual-Winding PMSM Based on Carrier Phase-Shift SVPWM

This paper addresses the issue of high-frequency current harmonics in dual-winding permanent magnet synchronous motors (DWPMSMs), which adversely affect motor performance and increase losses due to inverter-induced switching-frequency harmonics. To mitigate this issue, a novel harmonic suppression strategy is proposed, integrating a coupled-inductor inverter topology with interleaved carrier phase-shift techniques. The proposed approach establishes an optimal coordination principle between the carrier phase-shift angle and the voltage modulation index, ensuring minimal harmonic distortion across the entire modulation range. Theoretical analysis indicates that setting the phase-shift angle to π effectively suppresses harmonics near odd multiples of the switching frequency, whereas a phase-shift angle of π/2 targets even multiples. Finally, experimental results are presented to validate the effectiveness of the proposed method.