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Development of a Thermal Equivalent Circuit to Quantify the Effect of Thermal Paste on Heat Flow through a Permanent Magnet Alternator

Lookup NU author(s): Dr Mehmet KulanORCiD, Dr Nick BakerORCiD



This is the authors' accepted manuscript of an article that has been published in its final definitive form by IEEE, 2019.

For re-use rights please refer to the publisher's terms and conditions.


IEEE This paper describes the thermal modelling of a permanent magnet alternator (PMA). The principal focus is to investigate the effect of adding thermal paste into the machine end winding region. A thermal lumped parameter network is proposed to quantify the change in heat flow paths for a flange mounted alternator. The thermal model is implemented in Simulink, which allows many different heat paths to be easily combined. Since addition of a thermal paste introduces new axial heat flow by conduction paths between the stator windings and frame, the developed thermal network considers the detailed heat flow paths in the PMA. The thermal network is extended to the machine frame and part of the mounting plate. It is shown that axial heat flow has been improved 5.6% for the PMA with addition of the thermal paste. This in turn reduces winding temperature by around 10.5% at standstill DC tests. The model accuracy has been validated by performing FEA thermal simulations and experimental results.

Publication metadata

Author(s): Kulan MC, Baker NJ

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Industry Applications

Year: 2019

Volume: 55

Issue: 2

Pages: 1261-1271

Print publication date: 01/03/2019

Online publication date: 04/10/2018

Acceptance date: 19/09/2018

Date deposited: 19/11/2018

ISSN (print): 0093-9994

ISSN (electronic): 1939-9367

Publisher: IEEE


DOI: 10.1109/TIA.2018.2873528


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