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Eddy-current losses of surface-mounted permanent-magnet motors

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2 Author(s)
R. Rabinovici ; Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel ; T. J. E. Miller

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 fictitious voltage induced in a one-turn coil wound around a stator tooth. A simple method of calculating 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 fictitious voltage, including the load current effects, are shown. They illustrate the increase of eddy-current losses with motor load, particularly in conditions of advanced commutation

Published in:

IEE Proceedings - Electric Power Applications  (Volume:144 ,  Issue: 1 )