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Vibration modes and acoustic noise in a four-phase switched reluctance motor

Colby, R.S., Mottier, F.M., and Miller, T.J.E. (1996) Vibration modes and acoustic noise in a four-phase switched reluctance motor. IEEE Transactions on Industry Applications, 32 (6). pp. 1357-1364. ISSN 0093-9994 (doi:10.1109/28.556639)

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Publisher's URL: http://dx.doi.org/10.1109/28.556639

Abstract

Acoustic noise in the switched reluctance motor (SRM) is caused primarily by the deformation of the stator lamination stack. Acoustic noise is most severe when the periodic excitation of the SRM phases excites a natural vibration mode of the stack. The natural vibration modes and frequencies of a four-phase, 8/6 SRM are examined. Structural finite element analysis is used to compute the natural modes and frequencies. Impulse tests on the stator stack verify the calculations and show which modes are excited. Heuristic arguments are developed to predict the operating conditions that will excite the natural modes. Measurement of vibration while the machine is under load shows which operating conditions excite the natural modes and verifies the predictions. An approximate formula is derived to predict the frequency of the fundamental vibration mode in terms of lamination dimensions and material properties. The formula is validated by comparison with finite element calculations for several laminations, and hence is shown to be useful in design trade-off studies.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s):Miller, Prof Timothy
Authors: Colby, R.S., Mottier, F.M., and Miller, T.J.E.
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Transactions on Industry Applications
Publisher:Institute of Electrical and Electronics Engineers (IEEE)
ISSN:0093-9994
Copyright Holders:Copyright © 1996 Institute of Electrical and Electronics Engineers (IEEE)
First Published:First published in IEEE Transactions on industry applications 32(6):1357-1364
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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