Study on Temperature Rise Characteristics of Vehicle Permanent Magnet Synchronous Motors under Peak Working Conditions Considering Boiling Heat Transfer

HE Liange; CHEN Hongling; WU Hang; GE Shuaishuai; SHI Wenjun; YAN Xin

doi:10.7652/xjtuxb202204015

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Study on Temperature Rise Characteristics of Vehicle Permanent Magnet Synchronous Motors under Peak Working Conditions Considering Boiling Heat Transfer

更新时间：2025-07-09

- Study on Temperature Rise Characteristics of Vehicle Permanent Magnet Synchronous Motors under Peak Working Conditions Considering Boiling Heat Transfer
- Vol. 56, Issue 4, Pages: 138-146(2022)
- 作者机构：
  
  1. 重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆,400054
  2. 北京信息科技大学现代测控技术教育部重点实验室,北京,100192
  3. 重庆青山工业有限责任公司,重庆,402761
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202204015
  CLC： TM351
- Online First：10 April 2022，
  
  Published：2022
- 稿件说明：
移动端阅览
HE Liange, CHEN Hongling, WU Hang, et al. Study on Temperature Rise Characteristics of Vehicle Permanent Magnet Synchronous Motors under Peak Working Conditions Considering Boiling Heat Transfer[J]. 2022, 56(4): 138-146.
DOI：

HE Liange, CHEN Hongling, WU Hang, et al. Study on Temperature Rise Characteristics of Vehicle Permanent Magnet Synchronous Motors under Peak Working Conditions Considering Boiling Heat Transfer[J]. 2022, 56(4): 138-146. DOI： 10.7652/xjtuxb202204015.

摘要

为研究电动汽车在高原环境下峰值工况运行时永磁同步电机的温升问题

建立RPI过冷沸腾换热模型。该模型考虑了气泡分离直径、气泡分离频率和气泡成核密度等的影响

能够对沸腾换热过程中两相流状态进行准确分析。运用沸腾传热理论研究电机的温升特性

在流体域中建立沸腾传热模型以及气泡子模型

模拟电机在高原环境下的运行环境来研究冷却液进口温度、海拔高度以及进口流速等因素对电机温升的影响。结果表明:在电机热机后进行试验与仿真

考虑沸腾传热时电机的温升特性更接近试验结果

所以研究电机的温升特性时应该要考虑冷却系统沸腾传热的影响; 峰值工况下电机的温升特性随着冷却液进口温度的升高

电机绕组达到150 ℃所用的时间越少

即电机温度越高; 在平原或者高海拔环境下

电机在峰值工况运行时的温度增长速率均随着冷却水进口水温的增大而增大

而电机的温度随着大气压强的降低而下降; 由于冷却水的相变两相流沸腾传热现象

在高海拔地区运行时的温升特性比平原地区更好。

Abstract

To study the temperature rise of electric vehicle permanent magnet synchronous motors under peak working conditions in plateau environment

an RPI(Rensselaer Polytechnic Institute)subcooled boiling heat transfer model is established

which considers the effect of bubble separation diameter

bubble separation frequency

bubble nucleation density

etc. and could accurately analyze the two-phase flow state during boiling heat transfer. Using the boiling heat transfer theory to study the temperature rise characteristics of motors

we have established the boiling heat transfer model and the bubble submodel in the fluid domain

and simulated the working conditions of motors in the plateau environment to study the influence of factors such as coolant inlet temperature

altitude and inlet flow rate on the motor temperature rise. The result shows that the temperature rise characteristics of motors are closer to the test results after the motor is warmed up

so the influence of boiling heat transfer of the cooling system shall be considered when we study the temperature rise characteristics of motors. The temperature rise characteristics of motors under peak working conditions would increase with the coolant inlet temperature; the less time it takes for the motor winding to reach 150 ℃

the higher the motor temperature. In plain or high-altitude environments

the temperature growth rate of the motor during peak working conditions would increase with the water temperature at cooling water inlet

while the temperature of the motor would decrease with the atmospheric pressure. Due to the phase transformation of the cooling water and two-phase boiling heat transfer

the temperature rise characteristics in high-altitude areas are better than those in plain areas.

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