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Design optimization of radially magnetized, iron-cored, tubular permanent-magnet machines and drive systems

Wang, J.B. and Howe, D. (2004) Design optimization of radially magnetized, iron-cored, tubular permanent-magnet machines and drive systems. IEEE Transactions on Magnetics, 40 (5). pp. 3262-3277. ISSN 0018-9464


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In this paper we deduce, from analytical field solutions, the influence of leading design parameters on the performance of a radially magnetized, iron-cored, tubular permanent-magnet machine and its drive system. We derive analytical formulas for predicting the open-circuit electromotive force, the thrust force, the iron loss, and the winding resistance and inductances, as well as the converter losses. The force density, the machine and drive system efficiencies, and the power factor and converter volt-ampere (VA) rating are established as functions of a set of machine dimensional ratios, with due account of magnetic saturation and subject to a specified thermal constraint. We validate the utility and accuracy of the analytically derived formulas by finite-element calculations. Finally, we show that the design optimization of such a linear drive system must account for the losses and VA rating of the converter as well as the design parameters of the tubular machine.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2005 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: design optimization, electric drive, linear machine, permanent-magnet machine
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 11:12
Published Version: http://dx.doi.org/10.1109/TMAG.2004.833424
Status: Published
Refereed: Yes
Identification Number: 10.1109/TMAG.2004.833424
URI: http://eprints.whiterose.ac.uk/id/eprint/825

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