Structural mass in direct-drive permanent magnet electrical generators

McDonald, Alasdair and Mueller, Markus and Polinder, Henk (2008) Structural mass in direct-drive permanent magnet electrical generators. IET Renewable Power Generation, 2 (1). pp. 3-15. ISSN 1752-1416

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Official URL: https://doi.org/10.1049/iet-rpg:20070071

Abstract

Direct-drive permanent magnet (PM) synchronous machines for wind turbines are large, heavy and thus expensive to build, transport and install. The structure that is required to maintain the airgap clearance is often heavier than the electromagnetically active material. It is shown that the structural material can be estimated early on in the design process for axial-flux and radial-flux machines. By moving to a design without iron in the stator, the forces that the machine structure must deal with can be significantly reduced. The mass of iron-cored and air-cored axial-flux PM synchronous machines for a range of multi-MW wind turbines is compared. Scaling laws for PM generators in direct-drive wind turbines are also developed.

Creators(s):	McDonald, Alasdair ORCID: https://orcid.org/0000-0002-2238-3589, Mueller, Markus and Polinder, Henk;
Item type:	Article
ID code:	40408
Keywords:	air gaps, electric drives, permanent magnet generators , synchronous generators , wind turbines, Electrical engineering. Electronics Nuclear engineering, Renewable Energy, Sustainability and the Environment
Subjects:	Technology > Electrical engineering. Electronics Nuclear engineering
Department:	Faculty of Engineering > Electronic and Electrical Engineering
Depositing user:	Pure Administrator
Date deposited:	12 Jul 2012 10:39
Last modified:	20 Jan 2021 20:12
Related URLs:	http://ieeexplore.ieee.org/stamp/stamp.j...
URI:	https://strathprints.strath.ac.uk/id/eprint/40408
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