A1 Journal article (refereed), original research

Direct Liquid Cooling Method verified with an Axial-Flux Permanent-Magnet Traction Machine Prototype

Publication Details
Authors: Lindh Pia, Petrov Ilya, Jaatinen-Värri Ahti, Grönman Aki, Martinez-Iturralde Miguel, Satrústegui Marco, Pyrhönen Juha
Publication year: 2017
Language: English
Journal acronym: IEEE TIE
Volume number: 64
Issue number: 8
Start page: 6086
End page: 6095
Number of pages: 10
ISSN: 0278-0046
eISSN: 1557-9948
JUFO-Level of this publication: 3
Open Access: Not an Open Access publication


Efficient cooling is needed e.g. in traction
motors which face regularly high torque peaks and generate high stator Joule
losses. This paper studies the feasibility of the direct liquid cooling in the
thermal management of a low-power low-voltage permanent-magnet machine. A
tooth-coil axial-flux (AF) permanent-magnet (PM) double-stator-single-rotor
test machine was first equipped with indirect liquid cooling using water
cooling jackets and then with direct winding cooling. The winding material used
is a hybrid conductor comprising a stainless steel coolant conduit tightly
wrapped with stranded Litz wire. The performance of the motor is examined at
various power levels using oil or water as the cooling fluid. The results
confirm that the proposed direct cooling method is practical also in small
machines, and furthermore, it offers significant improvements in the machine
thermal management, especially, in cases where stator Joule losses dominate.

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Last updated on 2018-19-10 at 07:55