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。
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.
作者
武文皓
竺韵德
于大国
WU Wenhao;ZHU Yunde;YU Daguo(School of Mechanical and Power Engineering, North University of China, Taiyuan 030051, China;Ningbo Institute of Materials Technology and Engineering, CAS, Ningbo 315201, China)
出处
《电机与控制应用》
2018年第3期90-96,共7页
Electric machines & control application
基金
国家自然科学基金项目(51175482/E05091)
关键词
等效磁场
齿槽转矩
分段磁路
磁路近似精度
有限元分析
equivalent magnetization
cogging torque
partitions magnetic circuit
approximation precision
finite element analysis
