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A general arc-segment element for three-dimensional thermal modeling

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.

Publication metadata

Author(s): Simpson N, Wrobel R, Mellor PH

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Magnetics

Year: 2014

Volume: 50

Issue: 2

Online publication date: 26/02/2014

Acceptance date: 14/08/2013

ISSN (print): 0018-9464

ISSN (electronic): 1941-0069

Publisher: IEEE


DOI: 10.1109/TMAG.2013.2278866


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