A1 Journal article (refereed), original research

Direct Liquid Cooling in Low-Power Electrical Machines – Proof-of-Concept


Publication Details
Authors: Lindh Pia, Petrov Ilya, Semken Scott, Niemelä Markku, Pyrhönen Juha, Aarniovuori Lassi, Vaimann Toomas, Kallaste Ants

Publication year: 2016
Language: English
Related Journal or Series Information: IEEE Transactions on Energy Conversion
Volume number: 31
Issue number: 4
Start page: 1257
End page: 1266
JUFO-Level of this publication: 2
Open Access: Not an Open Access publication

Abstract
This paper evaluates the feasibility of a direct liquid cooling approach in the thermal management of an axial flux permanent magnet machine. To demonstrate the cooling method, a test motor was fitted with helical tooth coil windings formed from a hybrid conductor comprising a stainless steel coolant conduit tightly wrapped with stranded Litz wire. The motor is a 100 kW permanent-magnet, axial-flux, double-stator, single-rotor machine. The proof of concept integrated the motor with a closed liquid coolant loop, appropriate instrumentation, and a data acquisition system. The general performance of the motor was examined at various power levels using polyalphaolefin (PAO) oil as the cooling fluid. The results show the proposed cooling method to be feasible, and furthermore, to provide significant improvements to the machine thermal management.

Last updated on 2018-19-10 at 08:49