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Influence of design parameters on cogging torque in permanent magnet machines

Zhu, Z.Q. and Howe, D. (2000) Influence of design parameters on cogging torque in permanent magnet machines. IEEE Transactions on Energy Conversion, 15 (4). pp. 407-412. ISSN 0885-8969


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The influence of various design parameters on the cogging torque developed by permanent magnet machines is investigated. It is shown that the slot and pole number combination has a significant effect on the cogging torque, and influences the optimal value of both skew angle and magnet arc, as well as determining the optimal number of auxiliary teeth/slots. A simple factor, which is proportional to the slot number and the pole number and inversely proportional to their smallest common multiple, has been introduced to indicate the “goodness”β of the slot and pole number combination. In general, the higher the “goodness” factor the larger the cogging torque

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2000 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: cogging torque, electrical machines, machine design, permanent magnet machines, speed ripple, torque, torque ripple
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: 16 Dec 2005
Last Modified: 04 Jun 2014 11:20
Published Version: http://dx.doi.org/10.1109/60.900501
Status: Published
Refereed: Yes
Identification Number: 10.1109/60.900501
URI: http://eprints.whiterose.ac.uk/id/eprint/889

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