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Hollow Direct Air Cooled Rotor Windings: Experimental Verification

Estenlund, Samuel LU orcid and Reinap, Avo LU orcid (2024)
Abstract
This paper presents the experimental verification of a cooling concept based on hollow direct air cooling windings for the rotor of an electrically excited synchronous machine (EESM) with the application of traction drive for electric vehicles (EVs). Developing the performance of EESMs is important for the EV industry since it is today so reliant on permanent magnets. The idea behind the cooling concept is explained and the prototype machine made for the experimental verification presented. The results of the experimental work show that the direct air cooled hollow windings can maintain a continuous current corresponding to a copper current density of 21.1 A/mm2 or a rotor slot current density of 8.5 A/mm2 .
Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Electrically excited machine, Thermal analysis, Cooling
host publication
2024 International Conference on Electrical Machines (ICEM)
article number
203207
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85207483877
ISBN
979-8-3503-7061-4
979-8-3503-7060-7
DOI
10.1109/ICEM60801.2024.10700542
language
English
LU publication?
yes
additional info
Samuel Estenlund was born in 1987 in Sweden. He received the M.Sc. degree in electrical engineering in 2013 and the Ph.D. degree in 2024, both from Lund University, Lund, Sweden. He is currently affiliated with the Div. of Industrial Electrical Engineering and Automation, at the Faculty of Engineering of Lund University (LTH) in Sweden. His main research topics are electrically excited machines and direct air cooling. Avo Reinap was born in Estonia in 1973. He received the Diploma degree in engineering and the M.Sc. degree in power engineering from Tallinn University of Technology, Tallinn, Estonia, in 1998 and 2000, respectively. He received the Ph.D. degree in technology from Lund University, Lund, Sweden, in 2005. From 2005 to 2010, he was an Associate Professor in the Department of Electrical drives and Power Electronics, Tallinn University of Technology and from 2007 to 2011 a Postdoctoral Fellow in the Division of Industrial Electrical Engineering and Automation, Faculty of Engineering, Lund University.
id
b7233be6-b3ab-42dc-9a3f-9c4eefc8bf30
date added to LUP
2024-10-18 11:58:42
date last changed
2025-07-12 00:09:16
@inproceedings{b7233be6-b3ab-42dc-9a3f-9c4eefc8bf30,
  abstract     = {{This paper presents the experimental verification of a cooling concept based on hollow direct air cooling windings for the rotor of an electrically excited synchronous machine (EESM) with the application of traction drive for electric vehicles (EVs). Developing the performance of EESMs is important for the EV industry since it is today so reliant on permanent magnets. The idea behind the cooling concept is explained and the prototype machine made for the experimental verification presented. The results of the experimental work show that the direct air cooled hollow windings can maintain a continuous current corresponding to a copper current density of 21.1 A/mm2 or a rotor slot current density of 8.5 A/mm2 .}},
  author       = {{Estenlund, Samuel and Reinap, Avo}},
  booktitle    = {{2024 International Conference on Electrical Machines (ICEM)}},
  isbn         = {{979-8-3503-7061-4}},
  keywords     = {{Electrically excited machine; Thermal analysis; Cooling}},
  language     = {{eng}},
  month        = {{09}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  title        = {{Hollow Direct Air Cooled Rotor Windings: Experimental Verification}},
  url          = {{http://dx.doi.org/10.1109/ICEM60801.2024.10700542}},
  doi          = {{10.1109/ICEM60801.2024.10700542}},
  year         = {{2024}},
}