Thermal Analysis of Radial-Flux Electrical Machines With a High Power Density
Nerg, J.
Rilla, M.
Pyrhonen, J.
Dept. of Electr. Eng., Lappeenranta Univ. of Technol., Lappeenranta;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Oct. 2008
Volume: 55,
Issue: 10
On page(s): 3543-3554
ISSN: 0278-0046
Digital Object Identifier: 10.1109/TIE.2008.927403
First Published: 2008-06-26
Current Version Published: 2008-09-30
Abstract A lumped-parameter-based thermal analysis applicable to radial-flux electrical machines with a high power density is presented. The modeling strategies using T-equivalent lumped-parameter blocks as well as conventionally defined thermal resistances are discussed. Special attention is paid to the modeling of the convective heat transfer in the air gap of radial-flux electrical machines at different rotational speeds. A brief overview of the evaluation of different loss components is given. The performance of the developed thermal model was verified by comparing the calculated temperature values with the measurements in three different applications.
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