摘要
采用三维有限元的方法,对含端部磁钢永磁无刷直流电动机的反电动势进行了仿真分析,同时与无端部磁钢模型进行对比分析,并以气隙磁密为主要研究对象,分析了气隙磁密径向分量沿轴向的分布。在进行电磁计算时,为了充分考虑端部磁钢对电机反电动势的影响,可通过引入一个端部磁钢系数k来修正二维计算结果以接近三维仿真结果。样机的实验结果证明了其正确性,为新开发电机估算其反电动势提供了一种切实可行的方法。
This paper deals with the analysis for EMF waves of permanent magnet brushless DC motor with end-magnet using the three-dimensional finite-element method （3D FEM）, some of which were compared with the motor with no endmagnet. Taking the air gap flux density as the main study object, distribution of B along the shift -axis of permanent magnet brushless DC motor were analysed. Considering the influence of end-magnet on the EMF waveforms in electromagnetic calculation, an end factor reflecting end-magnet is defined to modify the 2D predicted result. The accuracy of the approach was verified with experiment results, supplying a fast and simple method for the estimation for EMF with new motor.
出处
《微特电机》
北大核心
2015年第9期36-38,共3页
Small & Special Electrical Machines
关键词
永磁无刷直流电动机
有限元法
端部磁钢系数
permanent magnet brushless DC motor
finite element method
end magnet factor
