中文摘要：

在数控机床领域,永磁同步电主轴的应用越来越广泛。为提高其工作精度,需要控制齿槽转矩。齿槽转矩是由气隙变化、永磁体形状和定子槽形式决定的。对表面式永磁同步电主轴进行了有限元仿真分析,通过优化永磁体的形状和极弧系数减小了永磁同步电主轴的齿槽转矩。结果表明：内倒圆式永磁体可减小齿槽转矩脉动。

英文摘要：

In the field of NC machine tool, the application of permanent magnet synchronous electric spindle （ PM- SES） is more and more widely. In order to improve its working accuracy, the cogging torque needs to be controlled. The cogging torque is determined by air gap change, the permanent magnet shapes and stator slot form. In this paper, the finite element simulation analysis has been conducted on the surface type permanent magnet synchronous electric spindle. Cogging torque of the permanent magnet synchronous e- lectric spindle is reduced by optimizing the shape of the permanent magnet and the coefficient of pole arc. The results show that inside round fillet type of permanent magnet ean reduce the cogging torque.