Abstract
Eccentricity-related faults in induction motors have been studied extensively over the last few decades. They can exist in the form of static or dynamic eccentricity or both, in which case it is called a mixed eccentricity fault. These faults cause bearing damage, excessive vibration and noise, unbalanced magnetic pull, and under extreme conditions, statorrotor rub which may seriously damage the motors. Since eccentricity faults are often associated with large induction machines, the repair or replacement costs arising out of such a scenario may easily run into tens and thousands of dollars. Previous research works have shown that it is extremely difficult to detect such faults if they appear individually, rather than in mixed form, unless the number of rotor bars and the pole-pair number conform to certain relationships. In this paper, it is shown that the terminal voltages of induction machines at switch-off reveal certain features that can lead to the detection of these faults in individual form, even in machines that do not show these signatures in line-current spectrum in steady state, or to the detection of the main contributory factor in case of mixed eccentricity.
Original language | English |
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Article number | 5499005 |
Pages (from-to) | 1673-1683 |
Number of pages | 11 |
Journal | IEEE Transactions on Industrial Electronics |
Volume | 58 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2011 May |
Bibliographical note
Funding Information:Manuscript received November 18, 2009; revised February 5, 2010, April 7, 2010, and May 17, 2010; accepted June 9, 2010. Date of publication July 1, 2010; date of current version April 13, 2011. This work was supported in part by Canada Foundation for Innovation, by the Natural Sciences and Engineering Research Council of Canada, by the University of Victoria, and by Korea University under the second stage of the Brain Korea 21 Program (2008–2009).
Keywords
- Dynamic and mixed eccentricity faults
- Modified Winding Function Approach
- Short-Time Fourier Transform (STFT)
- Switch-off Voltage Transient Analysis
- fault diagnosis
- induction-motor protection
- motor current signature analysis (MCSA)
- power spectral density
- spectral analysis
- static
- unbalanced magnetic pull (UMP)
ASJC Scopus subject areas
- Control and Systems Engineering
- Electrical and Electronic Engineering