Reduction of cogging torque in interior-magnet brushless machines

Abstract

An investigation into the cogging torque in a four-pole interior-magnet brushless machines having either a six-slot stator and a short-pitched nonoverlapping winding or a 12-slot stator and a full-pitched overlapping winding is described. It is shown by finite-element analyses and measurements that, by appropriately defining the pole-arc to pole-pitch ratio, the optimal pole-arc to pole-pitch ratio for minimum cogging torque, which has been derived for surface-mounted magnet machines, is equally applicable to interior-magnet machines.

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Authors/Creators:	Zhu, Z.Q. Ruangsinchaiwanich, S. Schofield, N. Howe, D.
Copyright, Publisher and Additional Information:	Copyright © 2003 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	brushless machines, cogging torque, permanent magnet machines, permanent magnets
Dates:	Published: September 2003
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield)
Depositing User:	Sherpa Assistant
Date Deposited:	12 Dec 2005
Last Modified:	04 Jun 2014 18:21
Published Version:	http://dx.doi.org/10.1109/TMAG.2003.816733
Status:	Published
Refereed:	Yes
Identification Number:	https://doi.org/10.1109/TMAG.2003.816733

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Reduction of cogging torque in interior-magnet brushless machines

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