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Thermal management of a high speed permanent magnet machine for an aeroengine

La Rocca, A.; Xu, Z.; Arumugam, P.; Pickering, S.J.; Eastwick, Carol; Gerada, C.; Bozhko, S.

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A. La Rocca

Z. Xu

P. Arumugam

S.J. Pickering

Professor of Mechanical Engineering

C. Gerada

S. Bozhko


The paper describes the mechanical and thermal design of a high speed, high power density synchronous permanent magnet machine for an aero engine starter generator system with a power rating of 150 kW and maximum speed of 32,000 rpm. As both mechanical and thermal aspects have a direct impact on machine overall performance and weight reduction, a critical design optimisation was carried out. Intensive cooling is guaranteed by direct liquid oil-cooling of stationary components; a stator sleeve is also introduced into the airgap to prevent excessive windage. Thermal investigations were carried out by the means of Computational Fluid Dynamics (CFD) and Lumped Parameter Thermal Network (LPTN) analyses. Experimental validation also allowed the identification of most critical machine temperatures and the validation of the models developed. Finite Element Analysis(FEA) is used for the static structural analyses of the statorsleeve.

Conference Name XXIIth International Conference on Electrical Machines (ICEM '2016)
End Date Sep 7, 2016
Acceptance Date May 20, 2016
Publication Date Sep 4, 2016
Deposit Date Jun 16, 2016
Publicly Available Date Sep 4, 2016
Peer Reviewed Peer Reviewed
Keywords Aerospace Engineering, Cooling, Electric machines, Generators, High Speed Machine, Mechanical Engineering, Permanent magnet motors, Thermal Management
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