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Power Losses and Heat Extraction in a Stator with Directly Air-Cooled Laminated Windings

Reinap, A. LU ; Hogmark, C. LU ; Marquez-Fernandez, F. J. LU ; Alakiila, M. LU and Andersson, M. LU (2018) 23rd International Conference on Electrical Machines, ICEM 2018 p.2675-2681
Abstract

This paper explores and assesses power loss generation and heat extraction in a stator with directly air-cooled laminated winding. An electrical machine winding made of an electric conducting sheet, which have slotted structure for accommodating a magnetic core, is denoted a laminated winding. A space is introduced between the conducting sheets so that the heating power is removed right where it is created. Explicit to the laminated windings, the conductors with smallest cross section and highest dc resistance have also limited cooling. Since these conductors are closest to the air-gap they become subject to induced power losses. An electrical machine with folded air-cooled laminated winding is built and evaluated. The paper... (More)

This paper explores and assesses power loss generation and heat extraction in a stator with directly air-cooled laminated winding. An electrical machine winding made of an electric conducting sheet, which have slotted structure for accommodating a magnetic core, is denoted a laminated winding. A space is introduced between the conducting sheets so that the heating power is removed right where it is created. Explicit to the laminated windings, the conductors with smallest cross section and highest dc resistance have also limited cooling. Since these conductors are closest to the air-gap they become subject to induced power losses. An electrical machine with folded air-cooled laminated winding is built and evaluated. The paper demonstrates on how the thermal management of the stator segments is evaluated and adjusted during the manufacturing process. The power loss estimation of the prototype machine reveals significant discrepancy between the measurements and the calculation of known power losses at no load condition compared to short-circuit conditions. Conjugate heat transfer models are developed to evaluate the coolant flow distribution and heat dissipation in the direct air-cooled laminated windings.

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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 concentrated windings, Finite element method, Laminated 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:85057195542
ISBN
9781538624777
DOI
10.1109/ICELMACH.2018.8506732
language
English
LU publication?
yes
id
9eb6603f-930c-4773-94e6-c713a6d2c047
date added to LUP
2018-12-04 09:57:11
date last changed
2019-04-23 04:43:19
@inproceedings{9eb6603f-930c-4773-94e6-c713a6d2c047,
  abstract     = {<p>This paper explores and assesses power loss generation and heat extraction in a stator with directly air-cooled laminated winding. An electrical machine winding made of an electric conducting sheet, which have slotted structure for accommodating a magnetic core, is denoted a laminated winding. A space is introduced between the conducting sheets so that the heating power is removed right where it is created. Explicit to the laminated windings, the conductors with smallest cross section and highest dc resistance have also limited cooling. Since these conductors are closest to the air-gap they become subject to induced power losses. An electrical machine with folded air-cooled laminated winding is built and evaluated. The paper demonstrates on how the thermal management of the stator segments is evaluated and adjusted during the manufacturing process. The power loss estimation of the prototype machine reveals significant discrepancy between the measurements and the calculation of known power losses at no load condition compared to short-circuit conditions. Conjugate heat transfer models are developed to evaluate the coolant flow distribution and heat dissipation in the direct air-cooled laminated windings.</p>},
  author       = {Reinap, A. and Hogmark, C. and Marquez-Fernandez, F. J. and Alakiila, M. and Andersson, M.},
  isbn         = {9781538624777},
  keyword      = {Conjugate heat transfer,Cooling integration,Distributed concentrated windings,Finite element method,Laminated windings},
  language     = {eng},
  location     = {Alexandroupoli, Greece},
  month        = {10},
  pages        = {2675--2681},
  publisher    = {Institute of Electrical and Electronics Engineers Inc.},
  title        = {Power Losses and Heat Extraction in a Stator with Directly Air-Cooled Laminated Windings},
  url          = {http://dx.doi.org/10.1109/ICELMACH.2018.8506732},
  year         = {2018},
}