Cooling System Design Optimization of an Enclosed PM Traction Motor for Subway Propulsion Systems  

作　　者：Longnv Li Nan Jia Xizhe Wang Yiran Yun Gaojia Zhu 

机构地区：[1]the School of Electrical Engineering,Tiangong University,Tianjin 300387,China [2]Tangshan Fengnan District Power supply Branch,State Grid Jibei Electric Power Co.Ltd.,Tangshan 063000,China [3]State Grid Tianjin Ninghe Electric Power Supply Company,Tianjin,China [4]the Power Electronics,Machines and Control Research Group,University of Nottingham,Nottingham NG72RD,U K [5]IEEE

出　　处：《CES Transactions on Electrical Machines and Systems》2023年第4期390-396,共7页中国电工技术学会电机与系统学报（英文）

基　　金：supported by the National Natural Science Foundation of China under Grant 52107007;the China Scholarship Council under Grant 202008120084;the“Chunhui Plan”Collaborative Research Project of Chinese Ministry of Education under Grant HZKY20220604。

摘　　要：This paper presents the design optimization of a self-circulated ventilation system for an enclosed permanent magnet(PM)traction motor utilized in the propulsion systems for subway trains.In order to analyze accurately the machine's inherent cooling capacity when the train is running,the ambient airflow and the related heat transfer coefficient(HTC)are numerically investigated considering synchronously the bogie installation structure.The machine is preliminary cooled with air ducts set on the motor shell,and the fluidic-thermal field distributions with only the shell air duct cooling are numerically calculated.During simulations,the HTC obtained in the former steps is applied to the external surface of the machine to model the inherent cooling characteristic caused by the train movement.To reduce the temperature rise and thus guarantee the motor's working reliability,an internal self-circulated air cooling system is proposed according to the machine temperature distribution.The air enclosed in the end-caps is driven by the blades mounted on both sides of the rotor core and forms two air circuits to bring the excessive power losses generated in the heating components to cool regions.The fluid flow and temperature rise distributions of the cooling system's structural parameters are further improved by the Taguchi method in order to confirm the efficacy of the internal air cooling system.

关 键 词：Permanent magnet(PM)traction motor Bogie installation structure Self-circulated ventilation system Taguchi method 

分 类 号：U264.1[机械工程—车辆工程]