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Assessment of cooling integration with direct cooled windings

Reinap, Avo LU ; Gabassi, Michael; Alakula, Mats LU and Andersson, Mats LU (2019) 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles and International Transportation Electrification Conference, ESARS-ITEC 2018
Abstract

This paper presents and assesses the cooling integration of medium size electrical machines with distributed hair-pin type of windings. By introducing a hollow or profiled conductor the generated heat can be removed right where it is created. The cooling duct in conductor that can be connected either to series or parallel cooling flows increases DC resistance up to 1.5 times when comparing commercially available small hollow conductors. Any added heating power is compensated by cooling and added pumping power that can bring the continuous operation to a new peak level though at lower efficiency. This article targets production oriented calculations and experiments for conjugate heat transfer analysis where the advantage of direct cooled... (More)

This paper presents and assesses the cooling integration of medium size electrical machines with distributed hair-pin type of windings. By introducing a hollow or profiled conductor the generated heat can be removed right where it is created. The cooling duct in conductor that can be connected either to series or parallel cooling flows increases DC resistance up to 1.5 times when comparing commercially available small hollow conductors. Any added heating power is compensated by cooling and added pumping power that can bring the continuous operation to a new peak level though at lower efficiency. This article targets production oriented calculations and experiments for conjugate heat transfer analysis where the advantage of direct cooled hair-pin type of windings is compared to more conventional rectangular solid conductors. A machine design, which is suitable for traction application, is selected to investigate the power losses in the machine winding and experimental work on direct cooled test cells is used to support the thermal design and evaluate the benefits of the cooling integration.

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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
conjugate heat transfer, cooling integration, distributed windings, finite element method, hollow conductors
host publication
2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles and International Transportation Electrification Conference, ESARS-ITEC 2018
publisher
Institute of Electrical and Electronics Engineers Inc.
conference name
2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles and International Transportation Electrification Conference, ESARS-ITEC 2018
conference location
Nottingham, United Kingdom
conference dates
2018-11-07 - 2018-11-09
external identifiers
  • scopus:85062070769
ISBN
9781538641927
DOI
10.1109/ESARS-ITEC.2018.8607655
language
English
LU publication?
yes
id
b05e5b41-b316-48aa-97ba-5634a8336768
date added to LUP
2019-03-06 13:59:40
date last changed
2019-04-02 04:14:31
@inproceedings{b05e5b41-b316-48aa-97ba-5634a8336768,
  abstract     = {<p>This paper presents and assesses the cooling integration of medium size electrical machines with distributed hair-pin type of windings. By introducing a hollow or profiled conductor the generated heat can be removed right where it is created. The cooling duct in conductor that can be connected either to series or parallel cooling flows increases DC resistance up to 1.5 times when comparing commercially available small hollow conductors. Any added heating power is compensated by cooling and added pumping power that can bring the continuous operation to a new peak level though at lower efficiency. This article targets production oriented calculations and experiments for conjugate heat transfer analysis where the advantage of direct cooled hair-pin type of windings is compared to more conventional rectangular solid conductors. A machine design, which is suitable for traction application, is selected to investigate the power losses in the machine winding and experimental work on direct cooled test cells is used to support the thermal design and evaluate the benefits of the cooling integration.</p>},
  author       = {Reinap, Avo and Gabassi, Michael and Alakula, Mats and Andersson, Mats},
  isbn         = {9781538641927},
  keyword      = {conjugate heat transfer,cooling integration,distributed windings,finite element method,hollow conductors},
  language     = {eng},
  location     = {Nottingham, United Kingdom},
  month        = {01},
  publisher    = {Institute of Electrical and Electronics Engineers Inc.},
  title        = {Assessment of cooling integration with direct cooled windings},
  url          = {http://dx.doi.org/10.1109/ESARS-ITEC.2018.8607655},
  year         = {2019},
}