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定子槽口宽度对同步电机永磁体涡流损耗影响

Keywords: 永磁体涡流损耗,有限元法,永磁同步电机,变频供电

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Abstract:

采用二维时步有限元法,系统地分析变频供电条件下高功率表贴式永磁同步电机定子槽口宽度对电机漏抗、功率因素、绕组电流、气隙磁密等参数的影响,从而确定永磁同步电机(PWM)波供电下槽口宽度对永磁体涡流损耗的影响.分析表明,定子槽口宽度由6.0mm变为2.5mm,电机漏抗增加,由高直流母线电压变频供电引起的电枢纹波电流得到较好抑制,高次谐波电流得到很好过滤,气隙磁密高次谐波幅值减小,永磁体涡流损耗减小可减小近40%.同时,对两台不同槽口宽度样机进行永磁体温升试验,验证了分析方法和计算结果的正确性.

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