Numerical study on the impact of end windings porosity on the fluid flow and heat transfer in a totally enclosed fan-cooled electrical machine

Salvatore La Rocca, Stephen J. Pickering, Carol N. Eastwick, Chris Gerada, Kristian Ronnberg

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

1 Citation (Scopus)

Abstract

Computational fluid dynamics (CFD) was used to model the end region of a typical low voltage Totally Enclosed Fan-Cooled (TEFC)induction motor (output power 11 kW). The complexity of the end windings geometry provides a significant CFD modelling challenge; in previous works approximated and simplified geometries were usually employed to model the end windings to reduce the complexity of the model and because of computational limitations [1]-[3]. In this work a more realistic end windings geometry representation was used to in order to investigate in more detail the complex fluid flow and thermal phenomena occurring in the end region which typically is an area of most interest for thermal management. This paper describes the influence of the different level of end winding's porosity on the predictions of fluid flow and heat dissipation rate in the end region. An alternative cooling arrangement, consisting of shaft mounted stirrers, was also considered and a CFD investigation was carried out in order to assess the impact of the proposed internal cooling design on the fluid flow and thermal performance of the end region of the selected TEFC machine. The methodology developed for the end windings geometry for this specific machine design can be potentially applied to different kinds of electrical machines.

Original languageEnglish
Title of host publication2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2138-2143
Number of pages6
ISBN (Electronic)9781538693490
DOIs
Publication statusPublished - May 2019
Externally publishedYes
Event11th IEEE International Electric Machines and Drives Conference, IEMDC 2019 - San Diego, United States
Duration: 12 May 201915 May 2019

Publication series

Name2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019

Conference

Conference11th IEEE International Electric Machines and Drives Conference, IEMDC 2019
Country/TerritoryUnited States
CitySan Diego
Period12/05/1915/05/19

Keywords

  • Computational fluid dynamics (CFD)
  • End region
  • End windings
  • Fluid flow and thermal modelling
  • TEFC induction motor

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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