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Lookup NU author(s): Dr Rafal Wrobel
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This paper describes a methodology for experimentally deriving thermal parameters in design of electrical machines, with focus on, but not limited to short-duty transient operation. Here, all key stator-winding thermal resistances and capacitances, which can be directly derived from thermal tests, are considered. The proposed approach is basedon the transient thermal step-change response for a test specimen/mottorete under test, where the heat transfer is welldefined and limited to a single path, e.g. a heat source (statorwinding body) to a heat sink (machine housing). Anyimperfections like the heat flux leakage from the motorette body/test rig are considered and experimentally compensatedfor. A detailed description of the underpinning assumptions, test procedure, required instrumentation, measured data postprocessing is provided and supplemented with several examples from hardware tests. Applicability and limitations of the methodology are also discussed. The presented work provides a novel standardised testing approach, where the measured data can be simply shared across different electrical machine designs, to provide a mean for accurate, time and resource effective design /assessment process.
Author(s): Wrobel R
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: 26th International Conference on Electrical Machines ICEM 2024
Year of Conference: 2024
Pages: 7
Acceptance date: 01/05/2024
Date deposited: 03/10/2024
