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The influence on the rotor loss of the high-speed motor by optimizing the rotor structure

机译：优化转子结构对高速电机转子损耗的影响

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摘要

Rotor Eddy current loss of high speed permanent magnet synchronous motor makes the motor efficiency drops, which can cause more serious problems, such as permanent magnet rotor demagnetization and affect the safe operation of the motor. The effect of segmenting permanent magnets on rotor loss was analysed with finite element analysis, Along with the axial segments increased, the eddy curent loss in the magnets can be reduced by segmenting,Loss in the permanent magnet is obviously reduced when permanent magnet is segmented around the circumference as the axial segment number exceeds a certain value. By using the shielding effect of the eddy-current magnetic field, Copper plating on inner and outer surface of rotor retain sleeve, although copper layer will produce eddy current losses, the magnetic field generated by the eddy currents counteract the harmonic components of the air gap magnetic field and reduce the permanent magnet rotor core, rotor protection loss set by analysing the thickness of the inner and outer coating distribution on the rotor eddy current loss, we obtained the optimal distribution of the copper layer.
机译：高速永磁同步电动机的转子涡流损耗会使电动机效率下降，从而可能引起更严重的问题，例如永磁体转子退磁并影响电动机的安全运行。用有限元分析法分析了永磁体分段对转子损耗的影响，随着轴向分段的增加，分段涡流可以减少磁体中的涡流损耗，当永磁体分段时，永磁体的损耗明显减小。轴段数超过一定值时的周长。利用涡流磁场的屏蔽作用，在转子固定套的内外表面镀铜，尽管铜层会产生涡流损耗，但涡流产生的磁场抵消了气隙的谐波分量磁场和减少永磁转子铁心，通过分析转子保护损耗的厚度，通过分析内外涂层的厚度分布对转子涡流的损耗，我们得到了铜层的最佳分布。

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