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Model of air cooled windings for traction machine

Estenlund, Samuel LU (2018) 23rd International Conference on Electrical Machines, ICEM 2018 p.1278-1284
Abstract

This article presents a concept of direct cooled windings for electrical machines, pumping air through hollow rectangular copper windings. The thermal constraints pose a serious limitation in the performance of many applications of electrical machines, not least in electrical vehicles. The difference between temporary maximum output and continuous output is often substantial. This difference can be decreased with effective cooling methods, such as direct cooling of the windings. The concept of direct cooled windings are modeled in a empirical-lumped parameter model. The model is described in the article and experimentally validated through experiments. Finally the results of the model regarding optimized dimensions for electrical... (More)

This article presents a concept of direct cooled windings for electrical machines, pumping air through hollow rectangular copper windings. The thermal constraints pose a serious limitation in the performance of many applications of electrical machines, not least in electrical vehicles. The difference between temporary maximum output and continuous output is often substantial. This difference can be decreased with effective cooling methods, such as direct cooling of the windings. The concept of direct cooled windings are modeled in a empirical-lumped parameter model. The model is described in the article and experimentally validated through experiments. Finally the results of the model regarding optimized dimensions for electrical machines are presented and discussed. The results show that a current density of 16 A/mm2(insulation and cooling channels accounted for) can be achieved. 18 A/mm2is achievable with other dimensions, but with lower efficiency. The pump power for the coolant air is similar in magnitude to the amount of resistive losses.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Air cooling, Direct cooling, Electric vehicle, Electrical machine, Fluid dynamics, Heat transfer, Rectangular windings
host publication
Proceedings - 2018 23rd International Conference on Electrical Machines, ICEM 2018
pages
7 pages
publisher
Institute of Electrical and Electronics Engineers Inc.
conference name
23rd International Conference on Electrical Machines, ICEM 2018
conference location
Alexandroupoli, Greece
conference dates
2018-09-03 - 2018-09-06
external identifiers
  • scopus:85057180516
ISBN
9781538624777
DOI
10.1109/ICELMACH.2018.8507016
language
English
LU publication?
yes
id
99ee58e8-ba69-44ec-bb5c-7420d53798ea
date added to LUP
2018-12-04 09:51:47
date last changed
2019-01-06 14:18:26
@inproceedings{99ee58e8-ba69-44ec-bb5c-7420d53798ea,
  abstract     = {<p>This article presents a concept of direct cooled windings for electrical machines, pumping air through hollow rectangular copper windings. The thermal constraints pose a serious limitation in the performance of many applications of electrical machines, not least in electrical vehicles. The difference between temporary maximum output and continuous output is often substantial. This difference can be decreased with effective cooling methods, such as direct cooling of the windings. The concept of direct cooled windings are modeled in a empirical-lumped parameter model. The model is described in the article and experimentally validated through experiments. Finally the results of the model regarding optimized dimensions for electrical machines are presented and discussed. The results show that a current density of 16 A/mm<sup>2</sup>(insulation and cooling channels accounted for) can be achieved. 18 A/mm<sup>2</sup>is achievable with other dimensions, but with lower efficiency. The pump power for the coolant air is similar in magnitude to the amount of resistive losses.</p>},
  author       = {Estenlund, Samuel},
  isbn         = {9781538624777},
  keyword      = {Air cooling,Direct cooling,Electric vehicle,Electrical machine,Fluid dynamics,Heat transfer,Rectangular windings},
  language     = {eng},
  location     = {Alexandroupoli, Greece},
  month        = {10},
  pages        = {1278--1284},
  publisher    = {Institute of Electrical and Electronics Engineers Inc.},
  title        = {Model of air cooled windings for traction machine},
  url          = {http://dx.doi.org/10.1109/ICELMACH.2018.8507016},
  year         = {2018},
}