Electromagnetically Excited Vibration Calculation and Analysis for a Three-Phase Asynchronous Motor with Finite Element Method

doi:10.11985/2015.09.005

Abstract

Abstract:

The electromagnetic vibration of the three-phase asynchronous motor under no load condition is studied in the paper. A time-stepping finite element model of the three-phase asynchronous motor is built to calculate the transient electromagnetic field, and Maxwell stress tensor method is adopted to capture the radial electromagnetic force under steady state no load condition. To detect the main harmonics contained in radial electromagnetic force, the comparison between the spectral analysis and analytic calculation is done. A 3D structural finite element model of the asynchronous motor is formed with Ansys software. The radial electromagnetic force is exerted on the surface of stator and the electromagnetic vibration is computed. Finally, simulation and experiment results are compared to verify the veracity of simulation analysis. Experimental results show that the method proposed in this paper can be applied to calculate the electromagnetic vibration at motor design stage.

Key words: Asynchronous motor, radial electromagnetic force, electromagnetic vibration, finite element method (FEM)

CLC Number:

TM341

Li Yan,Liu Jianan,Xia Jiakuan. Electromagnetically Excited Vibration Calculation and Analysis for a Three-Phase Asynchronous Motor with Finite Element Method[J]. Journal of Electrical Engineering, 2015, 10(9): 30-34.

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References 11

[1]	Yang S J. Low-noise electrical motor[M]. Oxford: Clarelldon Press, 1981.
[2]	Timar P L . Noise and vibration of electrical machines[M]. Amsterdam: Elsevier Science Pub., 1989.
[3]	Zhang J J, Wang L L, Zhang H J , et al. Non-linear radial force simulation of switched reluctance motors based on finite element model[C]. IEEE Inter. Conf. on Robotics and Biomimetics, 2009: 21-26.
[4]	Zhu Z Q, Xia Z P, Wu L J , et al. Analytical modelling and finite element computation of radial vibration force in fractional-slot permanent magnet brushless machines[C]. Inter. Conf. on Electric Machines and Drives, 2009: 144-151.
[5]	张磊, 温旭辉 . 车用永磁同步电机径向电磁振动特性[J]. 电机与控制学报, 2012,16(5):33-39.
	Zhang Lei, Wen Xuhui . Radial electromagnetic vibration model characteristics of PMSMs for electric vehicles[J]. Electrical Machines and Control, 2012,16(5):33-39.
[6]	何海波, 刘海龙 . 异步电机径向电磁力的分析[J]. 微电机, 2011,44(8):26-31.
	He Haibo, Liu Hailong . Radial electromagnetic radial force analysis in induction motors[J]. Micromotors, 2011,44(8):26-31.
[7]	王荀, 邱阿瑞 . 笼型异步电动机径向电磁力波的有限元计算[J]. 电工技术学报, 2012,27(7):109-117.
	Wang Xun, Qiu Arui . Finite element calculation of radial electromagnetic force wave in squirrel-cage asynchronous motors[J]. Transactions of China Electrotechnical Society, 2012,27(7):109-117.
[8]	Isao Hirotsuka, Yousuke Niwa, Kazuo Tsuboi , et al. Experimental study of radial distributions of electromagnetic vibration and noise in three-phase squirrel-cage induction motor at no-load[C]. Inter. Conf. on Electric Machines and Systems, 2008: 64-68.
[9]	王玎, 祝长生, 符嘉靖 . 基于有限元的异步电机电磁振动分析[J]. 振动与冲击, 2012,31(2):140-144.
	Wang Ding, Zhu Changsheng, Fu Jiajing . Electromagnetically excited vibration analysis for anasynchronous electrical machine with finite element method[J]. Ournal of Vibration and Shock, 2012,31(2):140-144.
[10]	陈世坤 . 电机设计[M]. 2版.北京: 机械工业出版社, 2005: 214-215.
[11]	代颖, 崔淑梅, 宋立伟 . 车用电机的有限元模态分析[J]. 中国电机工程学报, 2011,31(9):100-104.
	Dai Ying, Cui Shumei, Song Liwei . Finite element method modal analysis of driving motor for electric vehicle[J]. Proceedings of the CSEE, 2011,31(9):100-104.

参数	数值
相数m	3
极对数p	1
槽配合Z₁/Z₂	36/28
定子外径/mm	380
定子内径/mm	210
气隙长度/mm	1.1
转子内径/mm	80

FFT结果	解析计算值
100	2f₁	2倍频
1 300	Z₂f₁- 2f₁	一阶转子齿谐波
1 400	Z₂f₁	一阶转子齿谐波
1 500	Z₂f₁+ 2f₁	一阶转子齿谐波
2 700	2Z₂f₁- 2f₁	二阶转子齿谐波
2 800	2Z₂f₁	二阶转子齿谐波
2 900	2Z₂f₁+ 2f₁	二阶转子齿谐波
4 100	3Z₂f₁- 2f₁	三阶转子齿谐波
4 200	3Z₂f₁	三阶转子齿谐波
4 300	3Z₂f₁+ 2f₁	三阶转子齿谐波

结构部件	弹性模量/GPa	泊松比	密度/(kg/m³)
定子	200	0.26	7 650
机壳	210	0.3	7 850
前端盖	210	0.28	7 100