[关键词]
[摘要]
现有的麦克斯韦应力法计算开关磁阻电机(SRM)径向力的过程中,气隙磁通密度的求取过于简化。由于麦克斯韦应力法的积分路径较简单,气隙磁通密度的准确度直接影响了径向力求取的精度。综合等效磁路法和麦克斯韦应力法,精确计算了SRM气隙磁通密度,给出了单相激励下定子径向电磁力的表达式。在角度位置控制 (APC) 方式下,推导了转子运转过程中定子径向电磁力的解析表达式。在有限元软件上进行了仿真,对比分析了解析计算得到的径向力在时域和频域的分布,解析结果和有限元仿真结果相比表明,即使在2倍额定电流下误差也能维持在10%以内。
[Key word]
[Abstract]
Due to the simplicity of integral path of Maxwell stress method, the accuracy of the air gap flux density directly affected the accuracy of the radial force. The calculation of air gap flux density in existing research based on Maxwell stress method was too simplified. Equivalent magnetic circuit method and Maxwell stress method were combined to derive the expression of radial force of stator when one phase was excited. In the angle position control (APC) mode, the analytical expression of the stator radial electromagnetic force during operation was derived. Comparative analysis of radial forces in the time and frequency domains by this method and the finite element analysis was performed. Results obtained by this method were in good agreement with those obtained by the finite element analysis with an error less than 10% at twice the rated current.
[中图分类号]
TM 352
[基金项目]