Performance Assessment of Standard Cooling Strategies for Hairpin Windings

A. La Rocca, S. La Rocca, T. Zou, Chuan Liu, M. Moslemin, C. Gerada, A. Cairns

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

This paper aims to assess the performance of some standard cooling strategies which are commonly used in traction electric motors for electric vehicles (EVs) employing hairpin windings. The use of such type of coils does normally lead to higher power dense designs, given the higher slot fill factors achievable; indeed the thermal management might become more challenging. The structured nature of the hairpin offers some opportunities from the cooling perspective but at the same time it might have some downsides, depending on the cooling option employed. In this work, two hairpin wound stators are taken into consideration, one with only two layer and another one with eight layers. Standard cooling strategies such as oil spray, water jacket and potting are being considered and the thermal behavior of each design is investigated. The thermal analyses are carried out numerically with the use of Computational Fluidynamics (CFD), including both fluid flow and heat transfer. The results allowed identifying the most appropriate cooling option in each design and provided useful input on how to maximise the heat dissipation.

Original languageEnglish
Title of host publication2022 International Conference on Electrical Machines, ICEM 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1163-1169
Number of pages7
ISBN (Electronic)9781665414326
DOIs
Publication statusPublished - 2022
Event2022 International Conference on Electrical Machines, ICEM 2022 - Valencia, Spain
Duration: 5 Sep 20228 Sep 2022

Publication series

Name2022 International Conference on Electrical Machines, ICEM 2022

Conference

Conference2022 International Conference on Electrical Machines, ICEM 2022
Country/TerritorySpain
CityValencia
Period5/09/228/09/22

Keywords

  • CFD
  • Hairpin Windings
  • High Power Density
  • Spray Cooling
  • Thermal Management

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Performance Assessment of Standard Cooling Strategies for Hairpin Windings'. Together they form a unique fingerprint.

Cite this