[关键词]
[摘要]
结合等效磁场实现转子内磁场强度至转子轭表面的转换,分别建立了开口、半开(闭)口定子槽模型,采用分段磁路法分析各段磁路长度变化情况,给出了不同定子槽模型下齿槽转矩的解析式。分析定子冲片选用不同牌号的硅钢片材料对齿槽转矩的影响。经研究表明:分段磁路法能够提高槽间磁路近似精度,且经分析优选的定子硅钢片材料可较为有效地削弱齿槽转矩。
[Key word]
[Abstract]
Considering the opening of stator slot, the precision of air gap flux density error correction directly affected accuracy of cogging torque. Correcting magnetic flux leakage of flux barrier, magnetic field intensity inside the rotor can be equivalent to the one on rotor surface. The mathematical models of opening slots and half opening slots were established respectively. The variation of magnetic path length was analyzed by partitions magnetic circuit, for illustrating mathematical correlation of cogging torque and different slot opening shape. The effect of various grades silicon steel sheet on cogging torque was analyzed. The study shows that the method above can access comparatively high approximation precision, the material determined by comparative analysis can reduce cogging torque effectively as well.
[中图分类号]
TM 351
[基金项目]
国家自然科学基金项目(51175482/E05091)