Journals / IASC / Vol.29, No.3

Research Article

BEST PAPER 2021

Stator Winding Fault Detection and Classification in Three-Phase Induction Motor

Majid Hussain1,2, Dileep Kumar Soother1, Imtiaz Hussain Kalwar3, Tayab Din Memon4,5, Zubair Ahmed Memon6, Kashif Nisar7,*, Bhawani Shankar Chowdhry1
1 NCRA Condition Monitoring Systems Lab, Mehran University of Engineering and Technology, Jamshoro, 76020, Pakistan
2 Department of Electronic Engineering, Quaid-e-Awam University of Engineering, Science and Technology, Nawabshah, Pakistan
3 Department of Electrical Engineering, DHA Suffa University, Karachi, Pakistan
4 Department of Electronic Engineering, Mehran University of Engineering and Technology, Jamshoro, 76020, Pakistan
5 School of Information Technology and Engineering, Melbourne Institute of Technology, Melbourne, Australia
6 Department of Electrical Engineering, Mehran University of Engineering and Technology, Jamshoro, 76020, Pakistan
7 Faculty of Computing and Informatics, University Malaysia Sabah, Kota Kinabalu, Sabah, 88400, Malaysia
* Corresponding Author: Kashif Nisar. Email:

Abstract

Induction motors (IMs) are the workhorse of the industry and are subjected to a harsh environment. Due to their operating conditions, they are exposed to different kinds of unavoidable faults that lead to unscheduled downtimes and losses. These faults may be detected early through predictive maintenance (i.e., deployment of condition monitoring systems). Motor current signature analysis (MCSA) is the most widely used technique to detect various faults in industrial motors. The stator winding faults (SWF) are one of the major faults. In this paper, we present an induction motor fault detection and identification system using signal processing techniques such as fast Fourier transform (FFT), short-time Fourier transform (STFT), and continuous wavelet transform (CWT). A three-phase motor model is developed in MATLAB Simulink and simulated under various fault conditions. The current signature is observed using FFT, spectrogram, and scalogram to detect the faults. It is observed that under some fault conditions, the current signature analysis remains indistinguishable from the non-fault case. Therefore, deep learning (DL) methods are adopted here to identify these faults. The time-series data of healthy and unhealthy conditions are obtained from the simulation results. The comparative investigation among DL models confirmed the superiority of the long short-term memory (LSTM) model, which achieved 97.87% accuracy in identifying the individual faults.

Keywords

Stator winding fault; spectrogram; scalogram; short-time Fourier transform; deep learning
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