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Thermal performance of an open-slot modular-wound machine with external rotor

Lookup NU author(s): Dr Rafal Wrobel


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This paper describes the thermal analysis of an external-rotor brushless permanent-magnet motor used in a traction application. The machine has a nonstandard open-slot stator lamination and is wound with a single-layer concentrated ''modular'' winding. This structure potentially has several heat transfer advantages compared to the more traditional double-layer concentrated winding. An analytical lumped-parameter thermal model has been developed for the machine to gain an understanding of the main cooling mechanisms and to investigate the potential heat transfer advantages. The thermal advantage of the modular winding over the more conventional 1.5-slot-per-pole design is presented. Results from the developed thermal model have been validated experimentally on a prototype wheel hub motor. © 2010 IEEE.

Publication metadata

Author(s): Wrobel R, Mellor PH, McNeill N, Staton DA

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Energy Conversion

Year: 2010

Volume: 25

Issue: 2

Pages: 403-411

Print publication date: 01/06/2010

Online publication date: 20/05/2010

ISSN (print): 0885-8969

ISSN (electronic): 1558-0059

Publisher: IEEE


DOI: 10.1109/TEC.2010.2047041


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