摘要
基于计算流体力学(CFD)方法,建立了全封闭自通风永磁同步牵引电机的流-固耦合共轭传热模型,对电机内部流动与传热特性进行了数值分析。结果表明,机座通风孔内的风量和表面换热系数随转速增加呈线性增长趋势。内风扇可显著提升端部空间内的热交换,使电机最高温升降低8.7 K。仿真结果与试验数据吻合良好,验证了模型的准确性,为牵引电机冷却结构优化提供了理论支撑。
A fluid-solid coupled conjugate heat transfer model for a fully-enclosed self-ventilated permanent magnet synchronous traction motor was established based on the Computational Fluid Dynamics(CFD).The internal flow and heat transfer characteristics of the motor were numerically analyzed.The results show that the airflow inside the housing ventilation holes and the surface heat transfer coefficient appears a linear increase trend with the rotational speed.The internal fan can significantly enhance the heat exchange in the end space,which result in a reduction of maximum temperature rise of the motor by 8.7 K.The simulation results is good agreement with the experimental data,which verifies the accuracy of the proposed model.This paper provides a theoretical support for the cooling structure optimization of the traction motor.
作者
李义国
杨柳
李奎
Li Yiguo;Yang Liu;Li Kui(Smart Operation Branch,Ningbo Rail Transit Group Co.,Ltd.,Ningbo 315100,China;CRRC Xiangyang Electric Motor Technology Co.,Ltd.,Xiangyang 441057,China;CRRC Zhuzhou Electric Locomotive Research Institute Co.,Ltd.,Zhuzhou 412001,China)
出处
《防爆电机》
2025年第5期29-34,共6页
Explosion-proof Electric Machine
关键词
自通风牵引电机
共轭传热
内风扇
电机温升
Self-ventilated traction motor
conjugate heat transfer
internal fan
motor temperature rise
