Eddy-current losses of surface-mounted permanentmagnet motors

R. Rabinovici, T. J.E. Miller

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


The paper presents an analytical method for estimating the eddy-current losses of surface-mounted permanent-magnet motors under load conditions. These losses are related to a fictious voltage induced in a one-turn coil wound around a stator tooth. A simple way to calculate part of the load currents for this voltage is described. It is shown that only the windings found in adjacent slots to the stator tooth considered contribute to it. Waveforms of this fictious voltage, including the load current effects, are shown. They illustrate the increase of eddycurrent losses with motor load, particularly in conditions of advanced commutation.

Original languageEnglish
Pages (from-to)61-64
Number of pages4
JournalIEE Proceedings: Electric Power Applications
Issue number1
StatePublished - 1 Jan 1997


  • Brushless motors
  • Eddy-current losses
  • Permanent-magnet motors


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