双边长初级磁通切换永磁直线电机推力波动分析及抑制

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摘要基于旋转型磁通切换永磁电机的工作原理和电磁发射的特点，提出了一种应用于电磁发射的新型磁通切换型长初级永磁直线电机，该电机具有推力密度大、动子结构简单、质量小的优点。首先，分析了该电机的结构和工作原理，并对该电机的电磁推力各分量的计算公式进行了推导。其次，分析了在正常和故障状态下引起推力波动的原因：根据推力波动产生的机理，针对边端定位力、磁阻力和容错控制运行状态下永磁谐波分量引起的推力波动，分别提出了采用楔形边端设计、绕组电感互补、电流谐波注入和次级错极等方法进行了优化和补偿，并通过二维瞬态有限元进行了验证仿真。最后，通过一台长次级的磁通切换永磁直线电机验证了有限元仿真的正确性以及所提出的推力波动抑制方法的有效性。

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	黄磊
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关键词 ：长初级直线电机, 磁通切换永磁, 有限元, 推力波动, 抑制

Abstract：On the basis of the principle of rotation flux-switching permanent magnet motor and the characteristic of electromagnetic launch,a double-sided long primary flux-switching permanent magnet linear motor(DSLP-FSPMLM) is proposed for electromagnetic launch application. The proposed linear machine has advantages of high thrust density,simple structure and small mass of the mover. Firstly,the topological structure and operation principle of the proposed are analyzed. And the thrust components are derived. Secondly,the reasons caused the thrust ripple under normal and fault-tolerant control operations are pointed and analyzed. According to the generation mechanisms of the thrust ripple,the methods by using wedge-shaped end-sides,inductance complementary winding,harmonic current injection and pole alignments are implemented to suppress the fluctuations caused by cogging force,reluctance force and harmonic component of the permanent magnet flux on fault-tolerant control operation. The two-dimensional transient finite element method is employed to calculate the thrusts of the optimized ones. Lastly,a double-sided long secondary flux-switching permanent magnet linear motor is used to verify the correctness of the results obtained by finite element analysis and the effectiveness of the proposed thrust ripple suppression method.

Key words： Long primary linear motor flux-switching permanent magnet finite element method thrust ripple suppression

收稿日期: 2013-06-07 出版日期: 2015-01-22

PACS:

TM359.4

基金资助:江苏省自然基金（BK20130613）和航空科学基金（20130769005）资助项目。

作者简介: 黄磊男，1980年生，讲师，研究方向为直线电机设计与优化及控制系统研究。胡敏强男，1961年生，教授，博士生导师，主要从事微特电机及其控制，波浪能发电新技术研究。

引用本文:

黄磊，胡敏强，刘静，余海涛，刘强. 双边长初级磁通切换永磁直线电机推力波动分析及抑制[J]. 电工技术学报, 2014, 29(11): 10-19. Huang Lei,Hu Minqiang,Liu Jing,Yu Haitao,Liu Qiang. Analysis and Suppression of the Thrust Ripple in a Double-Sided Long Primary Flux-Switching Permanent Magnet Linear Motor. Transactions of China Electrotechnical Society, 2014, 29(11): 10-19.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I11/10

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