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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2008, Vol. 9 Issue (2): 165-172    DOI: 10.1631/jzus.A071297
Electrical & Electronic Engineering     
Diagnosis of stator faults in induction motor based on zero sequence voltage after switch-off
Jia-qiang YANG, Jin HUANG, Tong LIU
School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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Abstract  To improve the accuracy of the stator winding fault diagnosis in induction motor, a new diagnostic method based on the Hilbert-Huang transform (HHT) was proposed. The ratio of fundamental zero sequence voltage to positive sequence voltage after switch-off was selected as the stator fault characteristic, which could effectively avoid the influence of the supply unbalance and the load fluctuation, and directly represent the asymmetry in the stator. Using the empirical mode decomposition (EMD) based on HHT, the zero sequence voltage after switch-off was decomposed and the fundamental component was extracted. Then, the fault characteristic can be acquired. Experimental results on a 4-kW induction motor demonstrate the feasibility and effectiveness of this method.

Key words： Induction motor      Stator fault diagnosis      Hilbert-Huang transform (HHT)      Zero sequence voltage      Empirical mode decomposition (EMD)     
Received: 08 June 2007     
CLC:  TM343  
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Jia-qiang YANG
Jin HUANG
Tong LIU
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Jia-qiang YANG, Jin HUANG, Tong LIU. Diagnosis of stator faults in induction motor based on zero sequence voltage after switch-off. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(2): 165-172.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A071297     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2008/V9/I2/165

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