Study of sliding mode weak magnetic control of built-in permanent magnet synchronous motor

Abstract A single current regulator weak magnet control method is proposed for built-in permanent magnet synchronous motors (IPMSM). To enhance the robustness, the method proposes a novel and improved dual-power convergent rate-integrated terminal sliding mode control (ITSMC) in the velocity outer loop of the single current regulator-variable q-axis voltage (SCR-VQV) weak magnet control strategy to replace the conventional PI control. Finally, the weak magnetic capability of the improved weak magnetic control algorithm with stabilized depth is verified on a MATLAB simulation platform.