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Magnet Eddy-Current Loss Analysis of Interior PM Machines for Electric Vehicle Application

机译:电动汽车用内装式永磁电机的磁涡流损耗分析

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The magnet eddy-current losses of six interior permanent magnet (IPM) machines are investigated for electric vehicle applications in this paper. The armature field, eddy-current density of magnet, the influence of PM depth, the distance of PM layers, and the number of PM segmentation are studied by finite-element analysis. It is demonstrated that increasing the PM depth of first layer and the distance of PM layers can provide more soft iron space for the armature-reaction flux, which can reduce the magnet eddy-current loss. PM segmentation can effectively reduce the PM eddy-current loss, because the eddy-current paths are divided into smaller loops, increasing the effective resistance. An IPM machine with segmented PM is prototyped to verify the analysis.
机译:本文针对电动汽车应用研究了六台内部永磁体(IPM)机器的磁涡流损耗。通过有限元分析研究了电枢磁场,磁体的涡流密度,永磁体深度的影响,永磁体层的距离以及永磁体的分割数量。结果表明,增加第一层的永磁体深度和永磁体层的距离可以为电枢反应磁通提供更多的软铁空间,从而可以减少磁体的涡流损耗。 PM分段可有效减少PM涡流损耗,因为涡流路径被分成较小的环路,从而增加了有效电阻。对具有分段PM的IPM机器进行原型设计以验证分析。

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