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Main Title: Comparison of Commonly Used Cooling Concepts for Electrical Machines in Automotive Applications
Author(s): Lehmann, Robert
Künzler, Moritz
Moullion, Matthias
Gauterin, Frank
Type: Article
Abstract: The thermal design of electrical machines has numerous influencing factors. This paper compares different cooling methods, their volume flow rates and other machine parameters with regard to the continuous power of a PMSM. Understanding the characteristics of different heat sinks depending on their operating point is important for an expedient design in order to avoid derating due to overtemperatures. As a design guideline, this contribution shows the influence of stator cooling jackets, rotor shaft cooling and direct end winding cooling for different machine lengths and volume flow rates. Both water and oil are investigated as coolants. With increasing machine dimensions, end winding cooling becomes less effective for heat sources in the center of the machine while the heat transferred in the cooling jacket increases. A sensitivity study of other machine parameters, such as the maximum allowed magnet temperature or the coolant inlet temperature, improves the understanding of the reader as to how the continuous power of a PMSM can be increased when the rotor temperature limits the performance.
Subject(s): electrical machine
cooling methods
machine scaling
sensitivity analysis
thermal design guidelines
Issue Date: 2-Jun-2022
Date Available: 11-Jul-2022
Language Code: en
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Journal Title: Machines
Publisher: MDPI
Volume: 10
Issue: 6
Article Number: 442
Publisher DOI: 10.3390/machines10060442
EISSN: 2075-1702
TU Affiliation(s): Fak. 4 Elektrotechnik und Informatik » Inst. Energie- und Automatisierungstechnik » FG Elektrische Antriebstechnik
Appears in Collections:Technische Universität Berlin » Publications

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