TY - GEN
T1 - Thermal Contact Conductivity Prediction with Grey Box Model and Experimental Validation for an Axial Flux Motor
AU - Li, Zhaozong
AU - Zhang, Chengning
AU - Zhang, Fengyu
AU - Xu, Zeyuan
AU - Gerada, David
AU - Gerada, Chris
AU - Li, Xueping
AU - Zhang, Shuo
AU - Zhao, Yue
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Axial Flux Permanent Magnet Synchronous Motor (AFPMSM) attracts increased attention in recent years due to the inherent high torque density. The yokeless and segment armature is one of the most advanced structures, with reduced axial length and increased efficiency. For the segment armature fixed axial flux motors, encapsulating material is required between the winding and the structure fins. However, it is difficult to calculate the contact thermal conductivity between the fins and windings for the machine thermal performance prediction, due to the multiple material components and different interface pressure. For the complicated materials characteristics analysis, Grey Box theory is proposed to predict the thermal behavior of the non-metallic mixture in the contact region in this paper. Firstly, the axial flux motor topology is presented, as well as a single sector model. Then the Grey Box frame is introduced with the testing rig to train the critical parameters that will be used in thermal model. Through genetic algorism, the thermal conductivity and heat capacity of mixture materials in the area of the segmented armature contact surface are obtained. Finally, the equivalent thermal conductivity in the contact region is updated to a 3D thermal model, which are experimentally validated on a sector model and a prototype motor.
AB - Axial Flux Permanent Magnet Synchronous Motor (AFPMSM) attracts increased attention in recent years due to the inherent high torque density. The yokeless and segment armature is one of the most advanced structures, with reduced axial length and increased efficiency. For the segment armature fixed axial flux motors, encapsulating material is required between the winding and the structure fins. However, it is difficult to calculate the contact thermal conductivity between the fins and windings for the machine thermal performance prediction, due to the multiple material components and different interface pressure. For the complicated materials characteristics analysis, Grey Box theory is proposed to predict the thermal behavior of the non-metallic mixture in the contact region in this paper. Firstly, the axial flux motor topology is presented, as well as a single sector model. Then the Grey Box frame is introduced with the testing rig to train the critical parameters that will be used in thermal model. Through genetic algorism, the thermal conductivity and heat capacity of mixture materials in the area of the segmented armature contact surface are obtained. Finally, the equivalent thermal conductivity in the contact region is updated to a 3D thermal model, which are experimentally validated on a sector model and a prototype motor.
KW - Axial Flux Motor
KW - Encapsulating Material
KW - Grey Box Theory
KW - Segment Armature
UR - http://www.scopus.com/inward/record.url?scp=85144063229&partnerID=8YFLogxK
U2 - 10.1109/ECCE50734.2022.9947860
DO - 10.1109/ECCE50734.2022.9947860
M3 - Conference contribution
AN - SCOPUS:85144063229
T3 - 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
BT - 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
Y2 - 9 October 2022 through 13 October 2022
ER -