位置传感器策略虽然已经广泛应用在普通工业场合，却未推广到位置伺服领域，原因在于无法辨识转子机械角度。为此，提出一种基于高频电压注入的带辅助齿表贴式永磁同步电机（SPMSM）转子机械角度无传感器辨识策略。根据所推导的带辅助齿SPMSM数学模型，在电角度零点处注入高频电压信号，划分出机械扇区。再使用传统无位置传感器算法获得电角度。最后，由电角度、机械扇区、机械角度三者之间的关系得到机械角度。仿真结果表明：所提算法能够识别电机转子机械角度。

Although the sensorless strategy has been widely used in general industrial occasions, it has not been applied in the field of position servo. The reason is that the rotor mechanical angle cannot be identified. Therefore, a sensorless identification strategy of surface permanent magnet synehromous motor (SPMSM) rotor mechanical angle with auxiliary teeth based on high-frequency voltage injection is proposed. According to the mathematical model of SPMSM with auxiliary teeth, the mechanical sector is divided by injecting high-frequency voltage signal at the electrical angle zero point. The traditional sensorless algorithm is used to obtain the electrical angle. Finally, the mechanical angle is obtained from the relationship among electrical angle, mechanical sector and mechanical angle. The simulation results show that the proposed algorithm can identify the mechanical angle of the motor rotor.

四川省重点研发项目（2021YFG0079）；福建科技计划-STS院省合作项目（2022T3041）