Design and Comparison of Radial Force Winding Configurations For Wide Air-Gap Flux-Switching Bearingless Permanent-Magnet Motor
Ding Qiang1,2, Wang Xiaolin1, Deng Zhiquan1, Ni Tuocheng1
1. College of Automation Nanjing University of Aeronautics & Astronautics Nanjing 211106 China;
2. School of Electrical Engineering Nanjing Institute of Industry Technology Nanjing 210023 China
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.
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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2018, Vol. 33 
