Experimental Investigation of Windage Loss Impacts on Electrical Machine with Oil Jet Cooling

Sen Zhang, Zeyuan Xu, Fengyu Zhang, Chuan Liu, Yuling He, Alan Zhang, Chris Gerada, David Gerada

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

Abstract

Oil-jet cooling is reported to be particularly effective for electrical machines, where oil is directly sprayed onto critical components, such as the stator or rotor. However, windage losses within the air gap can be substantial and can significantly affect the machine's temperatures and overall efficiency, especially when oil mist or droplets penetrate the space between the stator and rotor. Quantifying windage losses is challenging due to the uncertainties in oil distribution within the end space and air gap. This paper explores windage losses analytically, numerically and experimentally at various rotational speeds. The impacts of surface roughness, fluid medium types, as well as speeds on the windage losses are shown. Future works on the impacts of other parameters on the windage loss are proposed.

Original languageEnglish
Title of host publication2024 27th International Conference on Electrical Machines and Systems, ICEMS 2024
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3381-3386
Number of pages6
ISBN (Electronic)9784886864406
DOIs
Publication statusPublished - 2024
Event27th International Conference on Electrical Machines and Systems, ICEMS 2024 - Fukuoka, Japan
Duration: 26 Nov 202429 Nov 2024

Publication series

Name2024 27th International Conference on Electrical Machines and Systems, ICEMS 2024

Conference

Conference27th International Conference on Electrical Machines and Systems, ICEMS 2024
Country/TerritoryJapan
CityFukuoka
Period26/11/2429/11/24

Keywords

  • Air gap
  • Hairpin windings
  • Oil jet cooling
  • Windage loss

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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