摘要
车用牵引电机的温升直接影响新能源汽车牵引系统的安全性和可靠性,电机温升的准确计算和冷却系统的合理设计,对新能源汽车具有非常重要的意义。本文以一台额定功率20kW的车用永磁同步电机为例,从流速、压差、温升等多方面对比螺旋型、轴向Z字型、径向Z字型三种冷却水道。通过合理的等效和假设,建立整机的3D热仿真模型,基于流固耦合对电机进行热仿真,分析不同工况下电机的温升,通过对比分析不同冷却水流速的电机温升选取电机水道入口的最佳流速。最后以最佳流速作为样机冷却水入口流速进行温升实验,验证仿真分析的正确性。
The temperature rise of traction motor for vehicle directly affects the safety and reliability of the new energy vehicle traction system. The accurate calculation of temperature rise of motor and reasonable design of cooling system are of great significance for the new energy vehicle. In this paper, a permanent magnet synchronous motor with a rated power of 20kW was taken as an example. It compared three types of cooling channels: spiral type, axial Z-shaped and radial Z-shaped from the aspects of flow velocity, differential pressure and temperature rise. Through reasonable equivalent and assumptions, established a 3D thermal simulation model of the machine. Based on the fluid-solid coupling, the thermal simulation of the motor was carried out to analyze the temperature rise of the motor under different working conditions. By comparing and analyzing the temperature rise of the motor with different cooling water flow rates, the optimal velocity of the inlet of the motor waterway was selected. Finally, the temperature rise experiment was carried out with the optimal velocity as the inlet velocity of cooling water of the prototype to verify the correctness of the simulation analysis.
作者
王小飞
代颖
罗建
Wang Xiaofei;Dai Ying;Luo Jian(School of Electrical and Mechanical Engineering and Automation Shanghai University,Shanghai 200072 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2019年第A01期22-29,共8页
Transactions of China Electrotechnical Society
基金
国家重点研发计划资助项目(2018YFB0104801)
关键词
永磁同步电机
冷却系统
流固耦合
电机温升
最佳流速
Permanent magnet synchronous motor
cooling system
fluid-solid coupling
motor temperature rise
optimal flow rate
作者简介
王小飞,男,1990年生,硕士研究生,研究方向为电动汽车牵引用电机设计等。E-mail: lovemyself@shu.edu.cn;通信作者:代颖,女,1980生,副教授,研究方向为电机的振动噪声、电动汽车牵引用电机设计等。E-mail: ying.dai@shu.edu.cn.
