具有机械角度辨识功能的带辅助齿SPMSM设计与研究

永磁同步电机因其高功率密度、高效率以及高可靠性，被广泛应用在各个领域。在对机械角度有要求的应用场合一般使用位置传感器来获取电机转子的机械位置信息，这样会降低控制系统的可靠性、集成度以及功率密度。为了在不借助位置传感器的情况下实现对永磁电机的机械角度辨识，设计了一台表贴式永磁同步电机(SPMSM)的电磁。通过在转子上添加不同高度的辅助齿，使得电机拓扑的电感包含转子机械角度信息。使用有限元仿真软件分析了添加辅助齿对电机反电动势、输出转矩以及三相电感的负面影响。最后在0.75 kW的SPMSM平台上验证了所提拓扑结构的机械角度辨识能力。

Design and Research of SPMSM with Auxiliary Teeth with Mechanical Angle Identification Function

Permanent magnet synchronous motors have been widely used in various fields due to their high power density, efficiency, and reliability. In applications that require mechanical angles, position sensors are generally used to obtain the mechanical position information of the motor rotor, which can reduce the reliability, integration, and power density of the control system. In order to achieve mechanical angle identification of permanent magnet motors without the use of position sensors, the electromagnetism of a surface-mounted permanent magnet synchronous motor (SPMSM) is designed. By adding auxiliary teeth of different heights to the rotor, the inductance of the motor topology includes the mechanical angle information of the rotor. The negative effects of adding auxiliary teeth on the back electromotive force, output torque, and three-phase inductance of the motor are analyzed using finite element simulation software. Finally, the mechanical angle identification ability of the proposed topology is verified on the 0.75 kW SPMSM platform.