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Slotless Permanent-Magnet Machines: General Analytical Magnetic Field Calculation

机译:无槽永磁电机:一般分析磁场计算

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摘要

This paper presents a general analytical model for predicting the magnetic field of slotless permanent-magnet machines. The model takes into account the effect of eddy currents in conductive regions and notably in conductive permanent magnets without neglecting their remanent field. The modeling of this effect is important for the design of very high speed slotless permanent-magnet machines, as the power losses are linked with the frequency of the field. The model takes into account any number of layers. It implies that, for one, the fields can easily be calculated in a design including a permanent magnet and a conductive retaining sleeve. The model is applicable both to internal rotor and external rotor permanent-magnet machines. The effect of the relative permeability and of the conductivity of the permanent magnet or of the yoke on the magnetic fields is also taken into account. Any magnetization can be taken into account, in particular a Halbach type permanent magnet, or a radially magnetized permanent magnet can be considered.
机译:本文提出了一种用于预测无槽永磁电机磁场的通用分析模型。该模型考虑了在导电区域,特别是在导电永磁体中的涡电流的影响,而没有忽略其剩余磁场。这种效果的建模对于设计超高速无槽永磁电机非常重要,因为功率损耗与磁场频率有关。该模型考虑了任何数量的层。对于一个人来说,这意味着可以很容易地在包括永磁体和导电保持套的设计中计算出磁场。该模型适用于内转子和外转子永磁电机。还考虑了永磁体或磁轭的相对磁导率和电导率对磁场的影响。可以考虑任何磁化,特别是考虑到哈尔巴赫(Halbach)型永磁体,或者可以考虑径向磁化的永磁体。

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