Hybrid Cooling Method of Axial-Flux Permanent-Magnet Machines for Vehicle Applications

Thermal properties are a key issue in many applications associated with electrical machines. Because of its special configuration, an axial-flux electrical machine usually uses self-ventilation. However, this cooling method has a significant impact degrading the machine operating characteristics, an...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2015-12, Vol.62 (12), p.7382-7390
Main Authors: Polikarpova, M., Ponomarev, P., Lindh, P., Petrov, I., Jara, W., Naumanen, V., Tapia, J. A., Pyrhonen, J.
Format: Article
Language:English
Subjects:
Bars
Cooling
Copper
Electrical machines
Finite element analysis
Heating
hybrid cooling method
liquid jacket
Rotors
Stator windings
thermal analysis
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Summary:Thermal properties are a key issue in many applications associated with electrical machines. Because of its special configuration, an axial-flux electrical machine usually uses self-ventilation. However, this cooling method has a significant impact degrading the machine operating characteristics, and thus, an independent cooling system is desirable. The focus of this paper is on the steady-state thermal modeling and laboratory testing of an axial-flux permanent-magnet (AFPM) electrical machine intended for a traction application. The proposed hybrid cooling arrangement consists of a frame cooling circuit with a water flow inside, a set of copper bars inserted in the teeth, and a segment of potting material around the end windings. Computational fluid dynamics and finite-element analysis are applied for the preliminary design. This paper provides experimental verification of the simulation results on a 100-kW AFPM electrical machine.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2015.2465354