Analysis of Proximity Losses in a Brushless Permanent Magnet Motor

R Wrobel, PH Mellor, JN McNeill

Research output: Contribution to journalArticle (Academic Journal)peer-review


This paper presents a finite element investigation into the proximity losses in brushless AC permanent magnet motors used in hybrid/electric vehicle applications. The proximity effect in winding conductors is as a result of eddy-currents caused by magnetic fields generated by nearby conductors. This paper considers the influence of the conductor shape and disposition on the losses for a given stator lamination. Several structures of the winding are analysed and compared in respect to the loss and AC resistance. The analysis shows that the proximity losses can be significantly reduced through an appropriate choice of conductor shape and winding technique. An experimental winding test bench is used to validate the calculated results.
Translated title of the contributionAnalysis of Proximity Losses in a Brushless Permanent Magnet Motor
Original languageEnglish
Pages (from-to)528 - 534
Number of pages7
JournalStudies in Electromagnetics and Mechanics, Volume 27
Publication statusPublished - Sept 2006

Bibliographical note

Editors: Krawczyk, A, Wiak, S and Lopez-Fernandez, XM
ISBN: 9781586036270
Publisher: IOS Press
Name and Venue of Conference: International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering, ISEF '05, Baiona, Spain, 15-17 September 2005


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