Abstract：In a permanent magnet (PM) motor, a strong electromagnetic attracting force exists between the rotor magnets and the stator teeth. It causes the mechanical deformation and vibration of stator. In the paper, the electromagnetic vibration of PM motor with different slot/pole number combinations, such as 9/6, 18/6, 12/8, 24/8, 12/10, 15/10, is investigated. The electromagnetic forces of these motors at different rotor positions are calculated using 2D finite element method, and transferred to the structure transient finite element model. The corresponding vibration spectrum can be predicted. It is verified by experimental results. The simulated vibration spectrums of PM motors with the different slot/pole number combinations are analyzed and compared. The presented method is also used to design low-noise PM motors.
杨浩东, 陈阳生, 邓志奇. 永磁同步电机常用齿槽配合的电磁振动[J]. 电工技术学报, 2011, 26(9): 24-30.
Yang Haodong, Chen Yangsheng, Deng Zhiqi. Electromagnetic Vibration of PM Synchronous Motors with Different Combinations of Slot and Pole Number. Transactions of China Electrotechnical Society, 2011, 26(9): 24-30.
[1] Yang S J. Low-noise electrical motor[M]. Oxford：Clarendon Press, 1981. [2] Ishibashi F, Noda S, Mochizuki M. Numerical simulation of electromagnetic vibration of small motors[J]. IEE Proceedings of Electric Power Applica- tions, 1998, 145 (6): 528-534. [3] Huang S, Aydin M, Lipo T A. Electromagnetic vibration and noise assessment for surface mounted PM machines[C]. Proceedings of IEEE Power Engineering Society Summer Meeting, 2001, 3: 1417-1426. [4] Zhu Z Q, Dahaman Ishak, David Howe, et al. Unbalanced magnetic force in permanent-magnet brushless machines with diametrically asymmetric phase windings[J]. IEEE Transactions on Industry Applications, 2007, 43(6): 1544-1553. [5] Wang J, Xia Z P, Long S A, et al. Radial force density and vibration characteristics of modular permanent magnet brushless AC machine[J]. IEE Proceedings on Electric Power Applications, 2006, 153(6): 793-801. [6] Jacek F Gieras, Chong Wang, Joseph Cho Lai. Noise of polyphase electric motors[M]. Boca Raton: CRC Press, 2006． [7] Chen Y S, Zhu Z Q, Howe D. Vibration of PM brushless machines having a fractional number of slots per pole[J]. IEEE Transactions on Magnetics, 2006, 42(10): 3395-3397.
2011, Vol. 26 
