Harmonic-Suppressed Synchronous Predictive Control for Asymmetrical Six-Phase PMSM With Series-End Winding Connection

The series-end winding topology is recognized for enhancing the DC bus voltage utilization in multiphase motors. However, in an asymmetric six-phase motor fed by a seven-leg inverter, this topology causes certain voltage vectors to deviate from their expected positions. Consequently, existing control strategies struggle to fully exploit the speed operation region of the six-phase motor while suppressing harmonic currents and zero-sequence currents. Therefore, a dual-plane synchronous predictive control strategy is proposed in this paper. Within the predictive control framework, a voltage vector compensation mechanism is developed to achieve coordinated control between the torque-producing plane and the harmonic plane. Furthermore, zero-sequence voltage is injected to suppress the zero-sequence currents. Additionally, an overmodulation processing method is proposed, which releases the voltage components of the harmonic and zero-sequence planes to extend the speed operation region. Finally, experimental results validate the effectiveness of the proposed strategy in suppressing both harmonic and zero-sequence currents and expanding the speed operation region.

© 2026 IEEE. All rights reserved, including rights for text and data mining and training of artificial intelligence and similar technologies. Personal use is permitted, but republication/redistribution requires IEEE permission.