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Appl. Sci. 2018, 8(10), 1709; https://doi.org/10.3390/app8101709

Induction Motors Dynamic Eccentricity Fault Diagnosis Based on the Combined Use of WPD and EMD-Simulation Study

National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China
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Received: 20 August 2018 / Revised: 13 September 2018 / Accepted: 14 September 2018 / Published: 20 September 2018
(This article belongs to the Special Issue Fault Detection and Diagnosis in Mechatronics Systems)
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Abstract

The frequency-domain analysis using the fast Fourier transform (FFT) for diagnosis of eccentricity fault has been widely used in squirrel-cage induction motor (IM). However, with the restriction of sampling frequency and time acquisition, FFT analysis could not provide ideal results under low levels of dynamic eccentricity (DE). In this paper, a combined use of the wavelet packet decomposition (WPD) and empirical mode decomposition (EMD) method is presented to diagnose the IM fault under low degrees of purely DE. The proposed method is based on the decomposition of apparent power signal and extracts the characteristic component. The fault severity factor (FSF) has been defined to evaluate the eccentricity severity. Simulation results using the finite element method (FEM) are tested to verify the effectiveness of the presented method under different load conditions. View Full-Text
Keywords: induction motor (IM); dynamic eccentricity (DE); wavelet packet decomposition (WPD); empirical mode decomposition (EMD); finite element method (FEM) induction motor (IM); dynamic eccentricity (DE); wavelet packet decomposition (WPD); empirical mode decomposition (EMD); finite element method (FEM)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Tian, K.; Zhang, T.; Ai, Y.; Zhang, W. Induction Motors Dynamic Eccentricity Fault Diagnosis Based on the Combined Use of WPD and EMD-Simulation Study. Appl. Sci. 2018, 8, 1709.

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