Linear synchronous machine performance improvement with flux barriers

T. Cox, J. Proverbs, J.F. Eastham

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

1 Citation (Scopus)

Abstract

Linear synchronous motors can be used for large scale electromagnetic launch. The machines are short time rated and can therefore use substantial values of stator current loading. This leads to high values of armature flux and the risk of demagnetising the excitation magnets. In order to mitigate this risk by reducing the armature flux, quadrature axis flux barriers can be positioned in the permanent magnet backing iron. These reduce the armature field but leave the permanent magnet excitation field largely unchanged. In addition to improving the force due to the larger usable stator current loading, the barriers are beneficial in reducing the synchronous reactance and hence improving the power factor and reducing the Volt Amps per Newton of useful force (VA/N) of a linear motor. The paper explores the use of these barriers for a typical configuration and shows the performance improvements that can be obtained.
Original languageEnglish
Title of host publication6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012)
PublisherIET
PagesB143
ISBN (Print)978-1-84919-616-1
DOIs
Publication statusPublished - 2012
Event6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012) - Bristol, UK United Kingdom
Duration: 26 Mar 201228 Mar 2012

Publication series

NameIET Conference Publications
PublisherIET
NumberCP592
Volume2012

Conference

Conference6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012)
CountryUK United Kingdom
CityBristol
Period26/03/1228/03/12

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  • Cite this

    Cox, T., Proverbs, J., & Eastham, J. F. (2012). Linear synchronous machine performance improvement with flux barriers. In 6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012) (pp. B143). (IET Conference Publications; Vol. 2012, No. CP592). IET. https://doi.org/10.1049/cp.2012.0301