首页> 外文会议>第19届国际稀土永磁及应用研讨会(19th International Workshop on Rare Earth Permanent Magnets amp; Their Applications)(REPM'06) >Analysis of a Novel Flux-Weakening Structure of High-Speed Permanent-Magnet Motors Based on Soft-Magnetic Ferrite
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Analysis of a Novel Flux-Weakening Structure of High-Speed Permanent-Magnet Motors Based on Soft-Magnetic Ferrite

机译:基于软磁铁氧体的新型高速永磁电动机弱磁通量结构分析

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摘要

Soft-magnetic ferrite has advantages of high initial magnetic permeability, high electric resistivity, low loss and low cost in the high-frequency alternating field. Considering the characters of soft-magnetic ferrite, this paper uses a soft-magnetic ferrite ring as stator core and presents a novel field-weakening structure of high speed PM motors. Based on this structure, a novel field-weakening method of PM motors can be presented. The equivalent reluctance of permanent magnetic field circuit can be changed by altering saturation degree of soft-magnetic ferrite core in this method. For the convenience of analysis and calculation, considering the magnetic field distribution in the motors, this paper deduces an equivalent two-dimensional finite element model of three-dimensional magnetic field, by which the field-weakening parameters of high speed PM motor can be conveniently analyzed. The simulation results of finite element model prove: the field-weakening structure of high speed PM motor based on soft-magnetic ferrite, presented in this paper, is valid and feasible, offers a valid and applicative method for field-weakening control of high speed PM motor.
机译:软磁铁氧体在高频交变场中具有高初始导磁率,高电阻率,低损耗和低成本的优点。考虑到软磁铁氧体的特性,本文以软磁铁氧体环为定子铁心,提出了一种新型的高速永磁电动机的弱磁场结构。基于这种结构,可以提出一种新型的永磁电机弱磁方法。通过改变软磁性铁氧体磁芯的饱和度,可以改变永久磁场电路的等效磁阻。为了便于分析和计算,考虑电动机中的磁场分布,推导了等效的三维磁场二维有限元模型,通过该模型可以方便地实现高速永磁电动机的弱磁参数。分析。有限元模型的仿真结果证明:本文提出的基于软磁铁氧体的高速永磁电动机的弱磁结构是有效可行的,为高速弱磁控制提供了一种有效的方法。永磁电动机。

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