Reducing bearing wear in induction generators for wave and tidal current energy devices

J.K.H. Shek, D.E. Macpherson, M.A. Mueller, D.G. Dorrell, M. Hsieh

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


Marine energy devices such as wave energy converters and tidal current turbines are set to play a significant role in contributing to electricity generating by renewable means. The offshore location where these devices operate demands high reliability and robust fault tolerance. Bearing failure is a key issue for renewable energy devices and is a cause of significant downtime in wind turbines. Bearing wear is accelerated due to unbalanced magnetic pull in the rotor of an electrical generator. This paper presents a review and assessment of methods to reduce bearing wear through both machine design and active control through power electronics.
Original languageEnglish
Title of host publicationIET Renewable Power Generation Conference 2011 (RPG 2011)
Place of PublicationEdinburgh
Number of pages6
Publication statusPublished - Sep 2011


  • Bearing wear
  • induction machines
  • tidal current energy
  • unbalanced magnetic pull
  • wave energy

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