The optimization of pole arc coefficient to reduce cogging torque in surface-mounted permanent magnet motors
The optimization of pole arc coefficient to reduce cogging torque in surface-mounted permanent magnet motors
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DOI：
10.1109/tmag.2006.871452
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发表时间：
2006-03
影响因子：
2.1
通讯作者：
Yubo Yang;Xiuhe Wang;Rong Zhang;Tingting Ding;Renyuan Tang
中科院分区：
文献类型：
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作者：
Yubo Yang;Xiuhe Wang;Rong Zhang;Tingting Ding;Renyuan Tang
将改进的区域消去法（DEA）、有限元法（FEM）和解析法相结合，对永磁电机极弧系数进行优化，以减小永磁电机的齿槽转矩。由于齿槽转矩对永磁体极弧系数的变化非常敏感，因此在优化时，极弧系数的变化应非常小。由于齿槽转矩的计算需要通过有限元法计算各个极弧系数对应的齿槽转矩峰值，因此为了减少计算时间，极弧系数的可行域应尽可能小。本文首先用解析法缩小齿槽转矩较小的极弧系数可行域。然后，采用改进的DEA和有限元法，寻找最佳的极弧系数。优化后齿槽转矩大大降低，计算时间显著缩短
In this paper, the optimization method of improved domain elimination algorithm (DEA), finite-element method (FEM), and analytical method are combined to optimize the pole arc coefficient of a permanent magnet (PM) to minimize the cogging torque of a permanent magnet motor. Since the cogging torque is very sensitive to the changing of the pole arc coefficient of a PM, the changing of the pole arc coefficient should be very small in optimization. The cogging torque corresponding to many relative positions between magnet and armature must be calculated by FEM to find the peak value for every pole arc coefficient, so in order to reduce the computing time, the feasible region of the pole arc coefficient should be set to as small as possible. In this paper, the analytical method is first used to reduce the feasible region of pole arc coefficient in which the cogging torque is small. Then, improved DEA and FEM are used to find the best pole arc coefficient. After optimization, the cogging torque is greatly reduced, and the computing time decreases notably