1. Evaluation of high performance rotor cooling techniques for permanent magnet electric motors
- Author
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Joachim Druant, Brent van der Sijpe, Steven Vanhee, Jasper Nonneman, Michel De Paepe, and Ilya T'Jollyn
- Subjects
Electric motor ,Materials science ,business.product_category ,Technology and Engineering ,Electric motor cooling ,020209 energy ,Lumped parameter model ,Mechanical engineering ,02 engineering and technology ,law.invention ,law ,HEAT-TRANSFER ,Electric vehicle ,0202 electrical engineering, electronic engineering, information engineering ,Physics::Atomic Physics ,Rotor cooling ,Water jacket ,Rotor (electric) ,020208 electrical & electronic engineering ,Heat pipe ,Magnet ,Thermal management ,Synchronous motor ,business ,Permanent magnet synchronous motor ,SYSTEM ,Communication channel - Abstract
A thermal analysis of an interior permanent magnet machine using a lumped parameter model is presented, with the objective to evaluate several rotor cooling techniques for electric vehicle applications which are needed in order to achieve higher power densities. Two of the selected rotor cooling techniques involve cooling of the shaft by pumping a liquid through a channel in the shaft and by implementing a rotating heat pipe. The third selected rotor cooling technique is accomplished by pointing liquid jets towards the hub of the rotor. The lumped parameter model and implementation of these newly modeled cooling techniques are described. From the temperature distributions of the electrical machine resulting from water jacket cooling in combination with the different rotor cooling techniques, it was revealed that when the rotor of an electrical motor contains a hub, shaft cooling methods are ineffective. Rotor jet cooling however resulted in the most effective cooling approach to minimize permanent magnet temperatures. more...
- Published
- 2021