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Lookup NU author(s): Dr Rafal Wrobel
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This paper demonstrates the benefits of a generalized arc-segment lumped parameter thermal equivalent circuit representation that can be used in the 3-D thermal modeling of transformers, wound passive components, and electrical machines. The arc-segment is particularly suited to modeling stator/rotor teeth and end-windings. Commonly used two-resistor lumped parameter thermal networks do not accurately account for internal heat generation, which is essential for accurate temperature prediction. In contrast, the use of a T-network formulation can accurately cater for internal heat generation along with material anisotropy. The element formulation is verified numerically and experimentally using 2-D and 3-D finite element analysis and through the thermal analysis of a power inductor. © 2014 IEEE.
Author(s): Simpson N, Wrobel R, Mellor PH
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Magnetics
Online publication date: 26/02/2014
Acceptance date: 14/08/2013
ISSN (print): 0018-9464
ISSN (electronic): 1941-0069
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