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

作者：Lindh Pia M^*; Petrov Ilya; Semken R Scott; Niemela Markku; Pyrhonen Juha J; Aarniovuori Lassi; Vaimann Toomas; Kallaste Ants

来源：IEEE Transactions on Energy Conversion, 2016, 31(4): 1257-1266.

DOI：10.1109/TEC.2016.2597059

• Electric machines
• liquid cooling
• permanent-magnet motors
• rotating machines
• temperature dependence

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 a 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 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.

• 出版日期2016-12