Characterizing the convective wall heat transfer on convoluted shapes in the end-region of an induction machine

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Simulation of the heat transfer at the end-windings of an electric machine is often restricted by the quality of the coefficients used in the simulation model. This paper presents a method of obtaining correlations between the convective wall heat transfer coefficient (WHTC) and parameters of the end-region of an electrical machine and its operational conditions. The data have been evaluated by computational fluid dynamics (CFD) and validated by measurements. Dimensionless numbers for the WHTCs have been correlated to the simulated data by the Gauss-Newton method. This characterization provides a way of calculating values for the convective WHTC depending on the rotational speed and the end-shield geometry. Due to the used dimension analysis, the result is applicable on scaled geometries. It is not an exact method for calculating the convective WHTC, but provides a tool with sufficient accuracy for most engineering purposes.

Original languageEnglish
Title of host publicationProceedings - 2012 20th International Conference on Electrical Machines, ICEM 2012
Pages1219-1226
Number of pages8
DOIs
Publication statusPublished - 14 Dec 2012
Event2012 20th International Conference on Electrical Machines, ICEM 2012 - Marseille, France
Duration: 2 Sep 20125 Sep 2012

Publication series

NameProceedings - 2012 20th International Conference on Electrical Machines, ICEM 2012

Conference

Conference2012 20th International Conference on Electrical Machines, ICEM 2012
CountryFrance
CityMarseille
Period2/09/125/09/12

Keywords

  • Cooling
  • Electric machines
  • Fluid dynamics
  • Stators
  • Thermal analysis
  • Thermal management
  • Traction motors
  • Waste heat

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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