论文信息 - A Method for Rotor Vibration Monitoring of Induction Motor by Air-gap Flux Detection

A Method for Rotor Vibration Monitoring of Induction Motor by Air-gap Flux Detection

This paper presents results of the finite-element (FE) analysis and experiment of air-gap flux variation in induction motor when rotor eccentricity phenomenon occurs. An accurate modeling and analysis of rotor vibration in the motor are made using air-gap flux simulation, and search coils are used for measuring the actual magnetic flux. The simulated vibration system with 4-poles, 380 [V], 7.5 [kW], 1,768 [rpm] induction motor is built, and search coils are designed and inserted under the stator wedge of the motor. The FE analysis results are compared with experiment test results, and it shows that it is an effective method for developing on-line monitoring system on rotor vibration of an induction motor.

[1] David G. Dorrell,et al. On-line current monitoring to diagnose airgap eccentricity in large three-phase induction motors-industrial case histories verify the predictions , 1999 .

[2] A.H. Bonnett,et al. Repair or replace? , 2004, IEEE Industry Applications Magazine.

[3] David G. Dorrell,et al. The use of finite element methods to improve techniques for the early detection of faults in 3-phase induction motors , 1997 .

[4] Hamid A. Toliyat,et al. A method for dynamic simulation of air-gap eccentricity in induction machines , 1996 .

[5] G.H. Jang,et al. Prediction of the electromechanical faults in a single phase squirrel cage induction motor , 2003, Digest of INTERMAG 2003. International Magnetics Conference (Cat. No.03CH37401).

[6] Jin-Hee Lee,et al. Analysis of a three phase induction motor under eccentricity condition , 2005, 31st Annual Conference of IEEE Industrial Electronics Society, 2005. IECON 2005..

[7] T. Ishikawa,et al. Force and vibration analysis of induction motors , 2005, IEEE Transactions on Magnetics.