环形永磁体夹置式混合励磁无刷爪极发电机的研究

发布时间：2018-03-05 18:36

本文选题：混合励磁　切入点：永磁　出处：《电机与控制学报》2014年05期 　论文类型：期刊论文

【摘要】：为解决永磁发电机磁场调节困难和电励磁爪极发电机因存在电刷—滑环结构而导致的工作可靠性低的问题,提出了一种混合励磁无刷爪极发电机,由永磁体和励磁绕组共同产生气隙磁场,励磁绕组通过励磁支架固定在端盖,取消了电刷—滑环结构,且可以方便地通过调节励磁电流进行气隙磁场的调节。采用三维有限元法对电机的空载磁场分布及磁场调节能力进行了分析,确定了永磁体的合理尺寸。分析结果表明:采用新型混合励磁结构后,气隙平均磁密得到了较大提高,从而增大了电机的功率密度,改善了电机的低速发电性能;同时用较小的励磁电流即可产生较大的气隙磁密,降低了电机的励磁损耗。
[Abstract]:A hybrid excitation brushless claw pole generator is proposed in order to solve the problem of difficult magnetic field regulation and low reliability caused by the existence of brushless ring structure in electric excitation claw pole generator. The air-gap magnetic field is produced by the permanent magnet and the excitation winding. The excitation winding is fixed on the end cover through the excitation bracket, and the brush-slip ring structure is eliminated. It is convenient to adjust the air-gap magnetic field by adjusting the excitation current. The distribution of the no-load magnetic field and the adjusting ability of the magnetic field of the motor are analyzed by using the three-dimensional finite element method. The reasonable size of the permanent magnet is determined. The results show that the average magnetic density of the air gap is greatly improved with the new hybrid excitation structure, thus increasing the power density of the motor and improving the low speed generation performance of the motor. At the same time, a larger air gap magnetic density can be produced with a small excitation current, which reduces the excitation loss of the motor.
【作者单位】：山东大学电气工程学院;
【基金】：高等学校博士学科点专项科研基金(20110131110010)
【分类号】：TM31

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