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Instantaneous angular speed monitoring of electric motors

Ahmed Yousef Ben Sasi (Maintenance Engineering Research Group, Manchester School of Engineering, The University of Manchester, Manchester, UK)
Fengshou Gu (Maintenance Engineering Research Group, Manchester School of Engineering, The University of Manchester, Manchester, UK)
Bradley Payne (Maintenance Engineering Research Group, Manchester School of Engineering, The University of Manchester, Manchester, UK)
Andrew Ball (Maintenance Engineering Research Group, Manchester School of Engineering, The University of Manchester, Manchester, UK)

Journal of Quality in Maintenance Engineering

ISSN: 1355-2511

Article publication date: 1 June 2004

Abstract

This research presents the theory and implementation detail for the extraction of angular speed variations. In particular, band‐pass filtering, frequency shifting and analytic representation are addressed with simple mathematical equations. Finally, some case studies on a 3kW induction motor are investigated for healthy and faulty conditions. Some vital key features and characteristics can be extracted from the angular speed variations. Pole pass speed side bands around the rotor speed can be used as a feature for broken rotor bar faults. The number of poles multiplied by the synchronous running speed cycles and the rise of 100 Hz components are key characteristics for voltage imbalance faults.

Keywords

Citation

Yousef Ben Sasi, A., Gu, F., Payne, B. and Ball, A. (2004), "Instantaneous angular speed monitoring of electric motors", Journal of Quality in Maintenance Engineering, Vol. 10 No. 2, pp. 123-135. https://doi.org/10.1108/13552510410539196

Publisher

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Emerald Group Publishing Limited

Copyright © 2004, Emerald Group Publishing Limited