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《Proceedings of the CSEE》 2008-36
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Theory and Realization of 3 Pole Pairs Consequent-pole Bearingless Slice Motor

LIAO Qi-xin, WANG Xiao-lin, DENG Zhi-quan, QIU Zhi-jian, HUANG Yan, XIE Chao(Department of Electrical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu Province, China)  
The levitation of the consequent-pole bearingless PM motor is decoupled with the rotation,so the control system is simplified dramatically.However, that the motor pole pair number is lager than 3 is required.And the great pole number limits the application of the motor, especially in the high speed field.To reduce the pole number, the 3 pole pairs consequent-pole bearingless PM motor is studied.The magnetic circuit analysis shows that an inherent suspension force pulse exits in the 3 pole pairs motor which can't be eliminated completely.And it can be derived that the pulse can be suppressed to an acceptable range by thickening the permanent magnet and shortening the gap length properly.The conclusion is verified by finite element simulations.Finally, a prototype is built and the stable suspension is achieved which prove the feasibility of 3 pole pair consequent-pole bearingless slice PM motor.
【Fund】: 国家自然科学基金项目(50507008)~~
【CateGory Index】: TM359.9
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