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Influence of an aperture on the performance of a two-degree-of-freedom iron-cored spherical permanent-magnet actuator

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5 Author(s)
Mitchell, J.K. ; Dept. of Electron. & Electr. Eng., Univ. of Sheffield, UK ; Jewell, G.W. ; Wang, J. ; Bingham, C.M.
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This paper describes a computational and experimental study of a two-degree-of-freedom spherical permanent-magnet actuator equipped with an iron stator. In particular, it considers the effect of introducing an aperture in the stator core to facilitate access to the armature. The resultant magnetic field distribution in the region occupied by the stator windings, the net unbalanced radial force, and the resulting reluctance torque are determined by three-dimensional magnetostatic finite-element analysis. The predicted reluctance torque is validated experimentally, and its implications on actuator performance are described.

Published in:

Magnetics, IEEE Transactions on  (Volume:38 ,  Issue: 6 )

Date of Publication:

Nov 2002

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