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Accurate Engineering Calculation of Induction Motor Inductances andthe Effects of Space Harmonics
Author(s): 
Pages: 63-68
Year: Issue:  6
Journal: TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY

Keyword:  感应电动机谐波电感故障诊断;
Abstract: 多回路法是分析交流电动机绕组不对称运行的有效方法,其关键是电动机各回路阻抗?参数的准确计算.首先从单个线圈出发,推出感应电动机定转子各回路的自感以及各回路间互感的准确计算模型;定量分析了在进行感应电动机各电感参数计算时,计入谐波次数的高低与电动机各电感参数计算结果的关系;指出了气隙磁场的谐波对电动机的各电感参数的影响规律.通过仿真计算,揭示了空间谐波磁场对电动机转子绕组的自感、互感影响要比对定子绕组的自感、互感的影响严重得多,在电动机的分析计算中若考虑不当,会引起不能容忍的误差;提出了工程中合理的谐波计及次数,既保证计算精度,又具有较快的计算速度.
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