In order to obtain the reasonable air gap flux distribution, a computer-aided design approach of optimizing the rare earth magnet structures for dc torque motors is presented in this paper.

为了得到合理的气隙磁通分布，本文提出一种优化直流力矩电动机的稀土永磁结构的机辅设计方法。

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Infer mathematical expressions of air-gap permanent magnet flux distribution and thrust density, analyzes the effects of thrust and thrust density by the size of the motor.

推导出空载气隙磁密和推力密度的数学表达式，分析了电机的尺寸对推力、推力密度的影响。

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