Shanxi Weida Transmission Technology Co. , Ltd.
School of Mechanical and Transportation Engineering, Taiyuan University of Technology

为解决永磁同步电机在实际工作中存在的发热问题,基于计算流体动力学(CFD)软件对轴向Z字形以及周向Z字形两种水道结构下永磁电机的散热特性进行了数值模拟研究,抽取了机壳和复杂流道三维几何模型,利用ICEM进行了网格划分,完成了边界条件设置,通过仿真分析得到了不同流道结构下的压力场、流速及温度场等变化规律,分析了不同流道结构对电机散热效果的影响。结果表明:机壳温度在机壳不同区域存在明显不平衡性,轴向Z字形水道机壳温度呈现周向分布不平衡的现象,而周向Z字形水道机壳温度呈现轴向分布不平衡的现象,在相同流量下,轴向Z字形水道进出口压差与冷却水平均流速均明显大于周向Z字形水道,由于轴向Z字形水道内部冷却水平均流速更快,机壳与冷却水道最高温均低于周向Z字形水道6~7K,因此轴向Z字形水道散热效果更优,对于机壳温度可以更好地控制。

In order to improve the heat dissipation of permanent magnet motors, based on computational fluid dynamics(CFD) software, numerical simulation were conducted on the heat dissipation characteristics of permanent magnet motors under axial and circumferential Z-shaped water channel structures. Three dimensional geometric models of the casing and complex flow channels were extracted, and grid division was carried out using ICEM. Boundary condition settings were completed, and the pressure field, flow rate, and temperature field under different flow channel structures were obtained through simulation, and the influence of different flow channel structures on the heat dissipation effect of the motor was analyzed. The results show that there is a significant imbalance in the temperature of the casing in different areas of the casing. The temperature of the casing in the axial Z-shaped water channel shows a circumferential distribution imbalance, while the temperature of the casing in the circumferential Z - shaped water channel shows an axial distribution imbalance. Under the same flow rate, the pressure difference between the inlet and outlet of the axial Z-shaped water channel and the average flow velocity of the cooling level are significantly greater than those in the circumferential Z-shaped water channel. Due to the faster average flow velocity of the cooling level inside the axial Z-shaped water channel, The maximum temperature of the casing and cooling water channel is lower than that of the circumferential Z-shaped water channel 6-7 K, so the axial Z-shaped water channel has better heat dissipation effect and can better control the casing temperature.

企业横向委托项目“矿用永磁同步电机散热特性仿真分析及冷却系统优化设计”(NZ-H20220116)

师理智,赵天宇,崔红伟,等.矿用大功率永磁同步电机复杂流道散热特性数值模拟研究[J].煤炭工程,2025,57(1):152-159.