Publication
Title
Thermal modelling and validation of a direct rotor cooled permanent magnet electric machine
Author
Abstract
A novel direct rotor cooling method for electric machines is proposed and the performance is evaluated based on a thermal zonal model that is validated with measurements on a rotor heater setup. The trend of increasing power density of electric machines urges the need for high performance rotor cooling methods. A thermal model is needed to assess the performance of these methods on a certain geometry and to optimize the design. A previously developed thermal zonal model of an interior permanent magnet synchronous machine is extended with the novel direct rotor cooling method and validated with measurements on a rotor heater setup for different oil inlet temperatures (40 to 80 degrees C), flow rates (0.5 to 10 l/ min) and heating powers (261 to 873W). With a maximum absolute and relative deviation between the measurements and simulations of respectively 6.3 degrees C and 13.3% on the maximum rotor core temperatures for flow rates higher than 1 l/min, it is concluded that the model is sufficiently accurate when taking into account the assumptions and uncertainties on the input parameters. A model based comparison with the validated model shows the great potential of the novel direct rotor cooling method to push the power density to higher levels, since the relative magnet temperatures can be decreased by 71% compared to a hollow shaft liquid cooled machine.
Language
English
Source (book)
IEEE International Electric Machines and Drives Conference (IEMDC), MAY 15-18, 2023, San Francisco, CA
Publication
New york : Ieee , 2023
ISBN
979-83-503-9899-1
DOI
10.1109/IEMDC55163.2023.10238978
Volume/pages
(2023) , p. 1-5
ISI
001066025700135
Full text (Publisher's DOI)
Full text (open access)
The author-created version that incorporates referee comments and is the accepted for publication version Available from 06.03.2024
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 30.10.2023
Last edited 12.12.2023
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