Adaptive Dynamic Trajectory Enhancement Strategy for PMSM Field-Weakening Control Based on Operation Profile Constraint

Voltage closed-loop regulation is a classical access to realize the permanent magnet synchronous motor (PMSM) field-weakening (F-W) control. However, the unpredictable differential components in the voltage feedback always lead to the dynamic uncertainty. To address it, an adaptive dynamic trajectory enhancement strategy is proposed to improve the dynamic performance. Through the appropriate operation profile constraint, the dynamic trajectory can be forced on the voltage ellipse to reduce the uncertainty. Besides, an adaptive-tuning voltage regulator is implemented to address the impact of nonlinear operation. Furthermore, a speed-adaptive tradeoff module is proposed to realize a smooth dynamic transition, which could alleviate the overshoot and improve rapidity. The proposed strategy can realize the trace optimization in the dynamic state without sacrificing parameter robustness in the steady state, with its validity experimentally verified through a 2.2 kW PMSM test bench.