Journal
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
Volume 51, Issue 4, Pages 3020-3029Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIA.2015.2409260
Keywords
Convection heat transfer; electric vehicles (EVs); finite-element analysis (FEA); thermal resistance network (TRN)
Funding
- National Science Foundation of China [51337004]
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Totally enclosed water-cooled permanent magnet machines have been widely applied in electric vehicles due to their advantages of high torque density, high power factor, and strong overloading capacity. However, this type of machine often suffers from extremely high ambient temperature in a very limited space, which may lead to serious faults during operation, such as demagnetization. In order to study the thermal performance in depth, after investigation on the air convection within end-space, this paper presents a thermal model which takes into account the influence of the air temperature within the end-space on the temperature distribution by convection. Combining electromagnetic finite-element analysis with thermal resistance network, the thermal model is established, which is based on the law of heat flux balance in two continuous iterative calculations. Furthermore, computational fluid dynamic technology and experiments are implemented to further validate the proposed thermal model.
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