| 考虑加工误差的表贴式永磁伺服电机齿槽转矩分析与抑制 |
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| 引用本文： | 姜涛,曲诗健,孙佳伟.考虑加工误差的表贴式永磁伺服电机齿槽转矩分析与抑制[J].微电机,2022,0(6):16-23. |
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| 作者姓名： | 姜涛 曲诗健 孙佳伟 |
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| 作者单位： | (中车大连电力牵引研发中心有限公司,辽宁 大连 116052) |
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| 摘 要： | 在永磁伺服电机中，齿槽转矩对加工误差非常敏感。为获取实际加工误差对齿槽转矩变化规律的影响，本文首先采用能量法建立考虑加工误差的齿槽转矩解析表达式，并分析了齿槽转矩对各种加工误差的敏感性。其次，基于蒙特卡罗方法，通过实测与供应商提供的数据估计各误差的概率分布，由概率分布产生随机样本，据此建立考虑加工误差的有限元模型，计算各模型的齿槽转矩，由此获得齿槽转矩及其频谱的分布规律。并且，论证了定子冲片循环旋转方法的最优旋转槽数，基本消除了定子侧误差产生的额外齿槽转矩。最后，从生产的一批电机中随机抽取样本进行齿槽转矩测试，验证了本文所用分析与抑制方法的可行性。
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| 关 键 词： | 永磁伺服电机 蒙特卡罗法 齿槽转矩 加工误差 |
Analysis and suppression of cogging torque in surface-mounted permanent magnet servo machines considering manufacturing tolerances |
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| JIANG Tao,QU Shijian,SUN Jiawei.Analysis and suppression of cogging torque in surface-mounted permanent magnet servo machines considering manufacturing tolerances[J].Micromotors,2022,0(6):16-23. |
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| Authors: | JIANG Tao QU Shijian SUN Jiawei |
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| Affiliation: | (CRRC Dalian R&D Co.,Ltd., Dalian 116052, China) |
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| Abstract: | The manufacturing tolerances have a great influence on cogging torque in permanent magnet servo machines. In order to obtain the distribution regular pattern of cogging torque considering manufacturing tolerances in mass production, this paper uses energy method to derive the analytical expression of the cogging torque. The sensitivity of cogging torque to various manufacturing tolerances is also analyzed. Then based on the Monte Carlo method, the probability distribution of each error is estimated by the data provided by the measurement or the supplier, and then samples are randomly generated from the probability distribution. The finite element model considering the manufacturing tolerances are established and the cogging torque of each model is calculated. The distribution law of cogging torque and its spectrum is obtained. Furthermore, the optimal number of rotation slots in the stator lamination cycle rotation method is demonstrated, and the additional cogging torque generated by stator side error is basically eliminated. Finally, taking out one from a number of finished motors, and the cogging torque test is carried out, which is in agreement with the calculated results of this paper. |
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| Keywords: | permanent magnet servo machines Monte Carlo methods Cogging torque manufacturing tolerances |
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