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Behaviour of a polymer-bonded rare -earth magnet under excitation in two directions at right angles

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3 Author(s)
Binns, K.J. ; University of Southampton, Department of Electrical Engineering, Southampton, UK ; Low, T.S. ; Jabbar, M.A.

The characteristics of an anisotropic permanent magnetic when subjected to fields in the non-preferred direction, as well as the preferred one, is a subject which has not been explored in any depth except for some work on single crystals. An experiment is performed on a cylinder of anisotropic polymer-bonded rare-earth material, which can be subjected to relatively strong fields, either in the preferred or non-preferred direction, or in both. As a result of the observed interaction, a permeability tensor is proposed and evaluated for the particular material used in the experiment. The use of the tensor in a finite-element method of solution is explained and demonstrated.

Published in:

Electric Power Applications, IEE Proceedings B  (Volume:130 ,  Issue: 1 )