Lookup NU author(s): Dr James Widmer,
Dr Glynn Atkinson,
Professor Barrie Mecrow
This is the authors' accepted manuscript of an article that has been published in its final definitive form by IEEE, 2014.
For re-use rights please refer to the publisher's terms and conditions.
This paper reports a propulsion motor for a solar-powered aircraft. The motor uses precompressed aluminum stator windings, with a fill factor of greater than 75%, in a permanent magnet synchronous machine. The motor performance is compared empirically to an identical machine with conventionally wound copper windings. It is shown that there are many advantages to using compressed aluminum windings in terms of weight reduction, thermal improvement, and lower cost, for the same loss and electromagnetic performance, provided a sufficiently high slot fill factor can be achieved. The design and manufacture of the compressed coils is also discussed. A modular stator arrangement is used, in the form of a solid coreback with keyed teeth to allow easy assembly of the compressed windings. It is noted that the electromagnetic performance of the machine is unaffected by the modular nature of the magnetic core. Two prototype motors, one wound with conventional copper and the other with precompressed aluminum windings, are constructed and tested.
Author(s): Widmer JD, Spargo CM, Atkinson GJ, Mecrow BC
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Energy Conversion
Print publication date: 01/09/2014
Online publication date: 18/04/2014
Acceptance date: 20/03/2014
Date deposited: 11/02/2015
ISSN (print): 0885-8969
ISSN (electronic): 1558-0059
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