Abstract
Cooling of electric machines is a key to increasing power density and improving reliability. This paper focuses on the design of a machine using a cooling jacket wrapped around the stator. The thermal contact resistance (TCR) between the electric machine stator and cooling jacket is a significant factor in overall performance and is not well characterized. This interface is typically an interference fit subject to compressive pressure exceeding 5 MPa. An experimental investigation of this interface was carried out using a thermal transmittance setup using pressures between 5 and 10 MPa. The results were compared to currently available models for contact resistance, and one model was adapted for prediction of TCR in future motor designs.
Original language | American English |
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Article number | 041016 |
Number of pages | 7 |
Journal | Journal of Thermal Science and Engineering Applications |
Volume | 10 |
Issue number | 4 |
DOIs | |
State | Published - 1 Aug 2018 |
Bibliographical note
Publisher Copyright:© 2018 by ASME.
NREL Publication Number
- NREL/JA-5400-68042
Keywords
- cooling
- electric machines
- stators
- thermal contact resistance