Experimental Characterization and Modeling of Thermal Contact Resistance of Electric Machine Stator-to-Cooling Jacket Interface Under Interference Fit Loading: Paper No. TSEA-17-1239

Justine Cousineau, Kevin Bennion, Victor Chieduko, Rajiv Lall, Alan Gilbert

Research output: Contribution to journalArticlepeer-review

14 Scopus Citations

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 languageAmerican English
Number of pages7
JournalJournal of Thermal Science and Engineering Applications
Volume10
Issue number4
DOIs
StatePublished - 2018

NREL Publication Number

  • NREL/JA-5400-68042

Keywords

  • cooling
  • electric machines
  • stators
  • thermal contact resistance

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