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Improved thermal model for predicting end windings heat transfer
KTH.
Motor Design Ltd, Ellesmere, Shrops, England..
Motor Design Ltd, Ellesmere, Shrops, England..
Motor Design Ltd, Ellesmere, Shrops, England..
2017 (English)In: 2017 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE), IEEE , 2017, p. 4650-4657Conference paper, Published paper (Refereed)
Abstract [en]

The thermal analysis of the end space region of an electrical machine is mainly linked to the characterization of the convective heat transfer between the solid surfaces and the cooling fluid, normally air. Different relations have been proposed in literature by several authors but the calculation of the heat transfer coefficients (HTC) is still mainly related to empirical correlation factors, based on the experience. The aim of this work is to investigate the convection inside the end space region with the double objective of studying how the geometry influences the HTCs and of developing a new improved correlation for the computation of the HTCs. The study is conducted with the support of an advance CFD software. The investigation leads, as main result, to a dimensionless equation that links the Nusselt number to the rotational Reynolds number in the end-space region.

Place, publisher, year, edition, pages
IEEE , 2017. p. 4650-4657
Series
IEEE Energy Conversion Congress and Exposition, ISSN 2329-3721
Keywords [en]
End Windings, End-Space Region, Electrical Machines, Convection, Heat Transfer, Heat Transfer Coefficients (HTC), Computational Fluid Dynamics (CFD)
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-228179ISI: 000426847404138ISBN: 978-1-5090-2998-3 OAI: oai:DiVA.org:kth-228179DiVA, id: diva2:1209002
Conference
2017 9th Annual IEEE Energy Conversion Congress & Exposition (ECCE), OCT 01-05, 2017, Cincinnati, OH
Note

QC 20180521

Available from: 2018-05-21 Created: 2018-05-21 Last updated: 2018-05-21Bibliographically approved

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http://www.ieee-ecce.org/2017/

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Basso, Gabriele Luca
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