永磁同步电机油冷散热仿真与分析
Simulation and Analysis of Oil Cooling and Heat Dissipation in Permanent Magnet Synchronous Motors
摘要: 永磁同步电机用于高功率密度、高工作频率的车辆，不可避免地会导致电机本身温度升高，避免过高的温度对于电机的稳定运行至关重要。本文对一台8极48槽油冷式永磁同步电机进行建模，使用光滑粒子流体动力学方法(SPH)对冷却油的运动状态以及电机各表面的散热系数进行仿真计算。在此基础上，结合有限元方法对电机温度场进行数值计算，通过将电机在油冷冷却方式下与自然冷却方式下的温度场进行对比，证明油冷冷却方式的高效性，随后加入空心轴冷却结构以解决端部绕组温度较高问题，对电机的冷却系统设计提供参考，确保电机在高温环境下安全运行。
Abstract: Permanent magnet synchronous motor is used in vehicles with high power density and high working frequency, which will inevitably lead to the temperature rise of the motor itself. Avoiding excessive temperature is very important for the stable operation of the motor. In this paper, an 8-pole and 48-slot oil cooled permanent magnet synchronous motor is modeled, and the motion state of cooling oil and the heat dissipation coefficient of each surface of the motor are simulated and calculated by using the smooth particle hydrodynamics (SPH). On this basis, combined with the finite element method, the temperature field of the motor is numerically calculated. By comparing the temperature field of the motor under oil cooling mode with that under natural cooling mode, the efficiency of the oil cooling mode is proved. Then, the hollow shaft cooling structure is added to solve the problem of high temperature of the end winding, which provides reference for the design of the motor cooling system and ensures the safe operation of the motor in high temperature environment.
文章引用：李亚朋, 秦文瑾, 谢梦楠, 蒋大千, 王克兆, 孙卫东. 永磁同步电机油冷散热仿真与分析[J]. 建模与仿真, 2024, 13(6): 6568-6583. https://doi.org/10.12677/mos.2024.136599

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