关键词: 永磁同步电机, 无位置传感器控制, 高频信号注入, 滑模控制器, 滑模观测器, 超扭曲滑模

Abstract: The use of traditional sliding mode control method in the operation of permanent magnet synchronous motors at medium to low speeds often results in significant errors. Based on the sliding mode control algorithm, an adaptive sliding mode controller was combined with a control algorithm of high-frequency orthogonal signal injection to improve the rotor positioning accuracy of the motor at low speed while ensuring stability. In response to the problem of large overshoot of speed fluctuations when using traditional sliding mode control for high-speed operation of permanent magnet motors under sudden load changes, an improved design of a super twisted sliding mode observer was proposed to optimize and improve the dynamic response of the motor during operation. The stability analysis of the improved sliding mode observer was carried out using the Lyapunov stability criterion. Through simulation verification, the improved sliding mode observer control strategy can improve the rotor positioning accuracy and control system robustness over a wide speed range
including zero and low speed.

Key words: permanent magnet synchronous motor ( PMSM ), position sensor less control, high frequency signal injection, sliding mode controller, sliding mode observer, super twisted sliding mode