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Reduction of cogging force in PM linear motors by pole-shifting

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3 Author(s)
Bianchi, N. ; Dept. of Electr. Eng., Univ. of Padova, Italy ; Bolognani, S. ; Cappello, A.D.F.

A technique is described to reduce cogging force in permanent-magnet linear motors due to the interaction between the permanent magnets (PMs) and the stator teeth. It consists of a proper shift of the PMs so that this effect is compensated for among the poles of the machine. This technique, generally adopted for surface-mounted PM motors only, is also applied to interior PM motors. The rules to arrange the magnets appropriately are illustrated and the technique is verified by finite-element analysis and some experimental tests.

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:152 ,  Issue: 3 )

Date of Publication:

6 May 2005

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