基于辅助槽偏移的单相永磁同步电动机齿槽转矩削弱

Reducing Cogging Torque in Single-Phase Permanent Magnet Synchronous Motor Based on Auxiliary Slot Shifting

为削弱单相永磁同步电动机的齿槽转矩,提出一种辅助槽偏移的方法。根据齿槽转矩表达式定性分析了槽数对齿槽转矩的影响,以8槽6极内置式单相永磁同步电动机为例,建立该电动机的Maxwell 2D模型,给出开辅助槽和辅助槽偏移的方法,利用有限元法对不同辅助槽尺寸和偏移角度的齿槽转矩进行分析。仿真结果表明,合适的选择辅助槽尺寸和偏移角度对齿槽转矩的削弱具有显著的效果。为削弱单相永磁同步电动机的齿槽转矩提供了一定的参考依据。

In order to reduce the cogging torque of single-phase permanent magnet, the method of auxiliary slot shifting was presented. In this paper, taking affection of slot number for cogging torque was analyzed qualitatively, taking a case study of 8 slots 6 poles built-in single-phase permanent magnet synchronous motor for example, the Maxwell 2D model of motor was built, and method of opening auxiliary slot and auxiliary slot shifting was presented. The cogging torque at different size and shifting angle of auxiliary slot was analyzed based on finite element method. Simulation resuh shows that the size and shifting angle of auxiliary slot is selected adaptively, the result of reducing of cogging torque is remarkable. This paper provides some reference for the optimization of cogging torque in the built-in single-phase permanent magnet synchronous motor.