Abstract：A new method is advised to reduce the cogging torque of interior-magnet permanent magnet synchronous motor. Changing the lamination bridges, only the width is changed in this method, and the interval between two adjacent poles is the same. By suitable selecting the shape and width of lamination bridges, the cogging torque can be reduced. The analytical expression of cogging torque of interior-magnet permanent magnet synchronous motor with this method is obtained. Based on the analytical expression, the Fourier expression of the square of residual flux density of PM is found. Then the method to calculate the width of pole arc is advised. At last, the finite element method is used to calculate the cogging torque of one prototype, and the results verify that the cogging torque can be greatly reduced.
杨玉波, 王秀和, 丁婷婷. 基于单一磁极宽度变化的内置式永磁同步电动机齿槽转矩削弱方法[J]. 电工技术学报, 2009, 24(7): 41-45.
Yang Yubo, Wang Xiuhe, Ding Tingting. Different Pole-Arc Width Combination for Reducing Cogging Torque of Interior-Magnet PMSM. Transactions of China Electrotechnical Society, 2009, 24(7): 41-45.
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2009, Vol. 24 
