大气隙磁通切换无轴承永磁电机径向力绕组设计与比较

doi:10.19595/j.cnki.1000-6753.tces.170535

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摘要

以大气隙磁通切换无轴承永磁电机为对象,研究基于反电动势矢量图的径向力绕组配置原则,并详细分析隔齿绕法和全齿绕法两种绕组形式。在径向力建模过程中,推导计及转矩电流影响的完整径向力模型,并利用有限元分析验证其正确性。从转矩特性、径向力特性和铜耗特性等方面比较隔齿绕法和全齿绕法绕组结构的性能差异,并对比忽略转矩电流前后径向力合力幅值和方向角的变化,研究转矩电流对径向力性能的影响,进而提出在保证稳定悬浮前提下最大可忽略转矩电流的理论计算方法。随后对两种绕组配置方式进行综合评价。结果表明,隔齿绕法绕组结构除径向力脉动性能外,其他各项性能均优于全齿绕法绕组结构。最后在一台采用隔齿绕法绕组结构的原理样机上实现稳定悬浮运行。

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	丁强
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关键词 ：磁通切换, 无轴承永磁电机, 绕组结构, 隔齿绕法, 全齿绕法, 反电动势矢量图

Abstract：

This paper investigated a design method of radial force winding based on back-EMF vector diagram for a wide air-gap flux-switching bearingless permanent-magnet motor. Two forms of radial force windings, alternate-pole-wound (AltPW) winding configuration and all-pole-wound (AllPW) winding configuration, were analyzed in detail. A whole radial force model was derived by taking the influence of torque current into consideration, and the correctness of radial force model was verified by finite element analysis. The performance differences between AltPW and AllPW winding configurations were compared from the viewpoint of the characteristics of torque, radial force and copper loss. The influence of torque current on radial force performance was studied by comparing the variation of the amplitude and the directional angle of radial resultant force before and after neglecting the torque current. A method of calculating the maximum torque current which can be neglected was proposed on the condition that the stable suspension can be accomplished.Afterwards, the AltPW and AllPW winding configurations were evaluated. The results show that, except the characteristics of radial force ripple, all the performance of AltPW winding configuration is superior to that of AllPW winding configuration. Finally, the stable suspension is achieved by a prototype with AltPW winding configuration.

Key words： Flux-switching bearingless permanent-magnet motors winding configuration alternate-pole-wound all-pole-wound back-EMF vector diagram

收稿日期: 2017-04-28 出版日期: 2018-06-13

PACS:

TM351

基金资助:

国家自然科学基金项目资助（51677087）

通讯作者: 丁强男,1981年生,博士研究生,研究方向为无轴承永磁电机及其控制技术等。E-mail：q.ding@nuaa.edu.cn

作者简介: 王晓琳男,1976年生,博士,教授,研究方向为无轴承电机及其控制技术等。E-mail：wangxl@nuaa.edu.cn

引用本文:

丁强, 王晓琳, 邓智泉, 倪拓成. 大气隙磁通切换无轴承永磁电机径向力绕组设计与比较[J]. 电工技术学报, 2018, 33(11): 2403-2413. Ding Qiang, Wang Xiaolin, Deng Zhiquan, Ni Tuocheng. Design and Comparison of Radial Force Winding Configurations For Wide Air-Gap Flux-Switching Bearingless Permanent-Magnet Motor. Transactions of China Electrotechnical Society, 2018, 33(11): 2403-2413.

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