摘要：齿槽转矩是永磁电机的一个固有属性，它是引起永磁电机产生转矩脉动的主要原因之一。在降低永磁电机的齿槽转矩方面，最常见的办法有斜定子槽，凹定子齿，偏移转子磁极和匹配定转子极对数等。本文的主要工作是使用优化转子磁极尺寸，优化磁极偏移角度，和结合这两种方法使用微分进化的算法来减小软磁复合材料横向磁通永磁电机的齿槽转矩。本文使用三维有限元方法来计算电机的齿槽转矩和其他相关电磁参数，且通过实验可以验证计算方法的准确性。通过对上述几种优化结果的比较，表明了，使用转子磁极偏移一定的角度是最为有效的减小横向磁通永磁的电机的齿槽转矩的方法，和结合优化磁极尺寸的方法能够进一步优化电机的转矩性能。
关键词：齿槽转矩；横向磁场永磁电机；软磁复合材料；优化设计
Abstract: As one of main parasitic parameters in the permanent magnet synchronous machine (PMSM), cogging torque is the main component of the torque ripple. Among these methods for reducing the cogging torque, the stator skewing, stator teeth notching, rotor shifting, and pole pairing are mostly used. In this paper, the magnet dimension optimization and magnet shifts method are used to reduce the cogging torque of outerrotor TFM with soft magnetic composite (SMC) core. Combined the magnet dimension optimization and magnet shifts, the differential evaluation algorithm (DEA) was proposed to reduce the cogging torque of outerrotor TFM further. The finite element method (FEM) was used to calculate the cogging torque and electromagnetic torque of the outerrotor TFM. The FEM result of the original machine was verified by the experiment ones. The optimization results show that the most effect method for reducing the cogging torque in the transverse flux permanent magnet machine is the magnets shift a determined angle; furthermore the combined method can obtain the better performance.
Key words: cogging torque; transverse flux machine; soft magnetic composite material; optimization