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An Oil-Jet Cooling Design for Electrical Machine End Winding: Distribution of Oil and Oil Droplet Studies

  • Sen Zhang*
  • , Zeyuan Xu
  • , Fengyu Zhang
  • , Chuan Liu
  • , He Zhang
  • , Chris Gerada
  • , Xiaochen Zhang
  • , David Gerada
  • *Corresponding author for this work

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

Abstract

Effective thermal management is essential for advancing transportation electrification. Oil-jet cooling offers efficient, direct heat removal in electric machines, supporting compact and high-performance designs. However, limited experimental data on oil droplet behavior pose challenges for optimizing cooling effectiveness and validating simulation models. To address this gap, this study develops a custom-designed oil-jet test rig for electric machines. Using high-speed imaging, droplet size and dynamics are captured at scales down to 110 μ m. The resulting measurements and distributions reveal the complex mechanisms of oil-jet cooling, providing a physical basis for understanding heat transfer processes. These findings will serve as guidelines for future simulation work and enable the derivation of formulas to evaluate oil-jet cooling performance.

Original languageEnglish
Title of host publicationICEMS 2025 - 28th International Conference on Electrical Machines and Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1330-1335
Number of pages6
ISBN (Electronic)9788986510232
DOIs
Publication statusPublished - 2025
Event28th International Conference on Electrical Machines and Systems, ICEMS 2025 - Busan, Korea, Republic of
Duration: 16 Nov 202519 Nov 2025

Publication series

NameICEMS 2025 - 28th International Conference on Electrical Machines and Systems

Conference

Conference28th International Conference on Electrical Machines and Systems, ICEMS 2025
Country/TerritoryKorea, Republic of
CityBusan
Period16/11/2519/11/25

Free Keywords

  • electrical machine
  • oil distribution
  • oil droplet
  • oil-jet cooling

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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