TY - JOUR
T1 - Direct liquid cooling in low-power electrical machines
T2 - Proof-of-concept
AU - Lindh, Pia M.
AU - Petrov, Ilya
AU - Semken, R. Scott
AU - Niemela, Markku
AU - Pyrhonen, Juha J.
AU - Aarniovuori, Lassi
AU - Vaimann, Toomas
AU - Kallaste, Ants
PY - 2016/12/1
Y1 - 2016/12/1
N2 - 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.
AB - 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.
KW - Electric machines
KW - liquid cooling
KW - permanent-magnet motors
KW - rotating machines
KW - temperature dependence
UR - http://www.scopus.com/inward/record.url?scp=85003016712&partnerID=8YFLogxK
UR - https://ieeexplore.ieee.org/document/7527616
U2 - 10.1109/TEC.2016.2597059
DO - 10.1109/TEC.2016.2597059
M3 - Article
AN - SCOPUS:85003016712
SN - 0885-8969
VL - 31
SP - 1257
EP - 1266
JO - IEEE Transactions on Energy Conversion
JF - IEEE Transactions on Energy Conversion
IS - 4
M1 - 7527616
ER -