A Fast and Seamless Switching Control Strategy for Series-Parallel Winding Reconfiguration of PMSMs

Stator winding reconfiguration technology is investigated for its ability to realize online adaptation of motor output characteristics. However, conventional winding switching methods suffer from millisecond-scale transients, torque interruption, and asymmetric operation. To address these issues, this paper presents a fast and seamless switching control strategy for the series-parallel reconfiguration of permanent magnet synchronous motors (PMSMs). First, a zero-voltage-vector (ZVV)-based switching method is proposed, which completes reconfiguration within a single PWM period. This approach fundamentally eliminates torque interruption and asymmetric states inherent in conventional methods, and reduces the transient duration to a fixed 5 μs. Second, to eradicate residual torque ripples, deadbeat predictive current control (DPCC) is introduced into the winding reconfiguration system, ensuring one-step current tracking during reconfiguration. Third, a dedicated voltage correction scheme is designed to counteract abrupt parameter variations, guaranteeing the robustness of DPCC during reconfiguration transient. Collectively, these innovations achieve fast, seamless, and robust winding reconfiguration. Simulations and experiments verify the feasibility and effectiveness of the proposed strategy.