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Investigation of a direct liquid cooling system ina permanent magnet synchronous machine
Department of Electrical Engineering, LUT University, Lappeenranta, Finland.
Department of Electrical Engineering, LUT University, Lappeenranta, Finland.
Department of Electrical Engineering, LUT University, Lappeenranta, Finland.
Saimaa University of Applied Sciences, Lappeenranta, Finland.
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2019 (English)In: IEEE transactions on energy conversion, ISSN 0885-8969, E-ISSN 1558-0059Article in journal (Refereed) Published
Abstract [en]

A high demand for electrification of the transportsector has resulted in a need to provide compact and reliableelectric power trains where the electric machine is a key element.The cooling system has a strong impact on the specific torqueand power capability of the machine. The selection of thecooling solution should not be based on the steady-state coolingperformance only but also on the transient characteristics owingto the typical operational load nature of the propulsion system,where the load is not continuous (as it usually is in industrialapplications), but it frequently varies in time depending on thevehicle type and the driving style. This paper investigates indetail the cooling capabilities of a direct winding liquid coolingsolution and compares it with a traditional frame liquid coolingarrangement in the transient condition. As a result of thecomparison, it was found that the location of heat removal closeto the heat source makes the temperature transient time faster,which allows to apply overload operating points more frequently.

Place, publisher, year, edition, pages
2019.
Keywords [en]
Permanent magnet machines, temperature measurement, cooling, machine windings.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-263585DOI: 10.1109/TEC.2019.2952431OAI: oai:DiVA.org:kth-263585DiVA, id: diva2:1368321
Note

QC 20191113

Available from: 2019-11-06 Created: 2019-11-06 Last updated: 2019-11-13Bibliographically approved

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