Use of air-gap torque spectra for squirrel cage rotor fault identification

Vinod V. Thomas, Krishna Vasudevan, V. Jagadeesh Kumar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Identification of rotor faults in squirrel cage induction motors by estimation of air-gap torque spectra has gained considerable attention recently. This has the advantage that the signature spectrum generated by faults is in the low frequency region. But the torque computation needs a machine model. The standard healthy machine model has been proposed in the literature to estimate the signatures but the correlation between the actual torque and the estimated torque is not clear. This paper presents a simulation study of an induction motor with faulted rotor bars and presents a comparison with torque spectra predicted by healthy machine dq model excited with faulted machine currents. It is shown that the spectral information produced by the latter is able to reproduce not only the frequency but also the amplitude of the torque spectrum to a fair degree of accuracy.

Original languageEnglish
Title of host publicationProceedings of the International Conference on Power Electronics and Drive Systems
Pages484-488
Number of pages5
Volume2
Publication statusPublished - 2001
Event4th IEEE International Conference on Power Electronics and Drive Systems - Denpasar, Bali, Indonesia
Duration: 22-10-200125-10-2001

Conference

Conference4th IEEE International Conference on Power Electronics and Drive Systems
CountryIndonesia
CityDenpasar, Bali
Period22-10-0125-10-01

Fingerprint

Torque
Rotors
Air
Induction motors
Squirrel cage motors
Sciuridae

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Thomas, V. V., Vasudevan, K., & Kumar, V. J. (2001). Use of air-gap torque spectra for squirrel cage rotor fault identification. In Proceedings of the International Conference on Power Electronics and Drive Systems (Vol. 2, pp. 484-488)
Thomas, Vinod V. ; Vasudevan, Krishna ; Kumar, V. Jagadeesh. / Use of air-gap torque spectra for squirrel cage rotor fault identification. Proceedings of the International Conference on Power Electronics and Drive Systems. Vol. 2 2001. pp. 484-488
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Thomas, VV, Vasudevan, K & Kumar, VJ 2001, Use of air-gap torque spectra for squirrel cage rotor fault identification. in Proceedings of the International Conference on Power Electronics and Drive Systems. vol. 2, pp. 484-488, 4th IEEE International Conference on Power Electronics and Drive Systems, Denpasar, Bali, Indonesia, 22-10-01.

Use of air-gap torque spectra for squirrel cage rotor fault identification. / Thomas, Vinod V.; Vasudevan, Krishna; Kumar, V. Jagadeesh.

Proceedings of the International Conference on Power Electronics and Drive Systems. Vol. 2 2001. p. 484-488.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Identification of rotor faults in squirrel cage induction motors by estimation of air-gap torque spectra has gained considerable attention recently. This has the advantage that the signature spectrum generated by faults is in the low frequency region. But the torque computation needs a machine model. The standard healthy machine model has been proposed in the literature to estimate the signatures but the correlation between the actual torque and the estimated torque is not clear. This paper presents a simulation study of an induction motor with faulted rotor bars and presents a comparison with torque spectra predicted by healthy machine dq model excited with faulted machine currents. It is shown that the spectral information produced by the latter is able to reproduce not only the frequency but also the amplitude of the torque spectrum to a fair degree of accuracy.

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Thomas VV, Vasudevan K, Kumar VJ. Use of air-gap torque spectra for squirrel cage rotor fault identification. In Proceedings of the International Conference on Power Electronics and Drive Systems. Vol. 2. 2001. p. 484-488