不同冷却器挡板结构对高压永磁电机换热特性的影响分析

Analysis of the Effect of Different Cooler Baffle Structures on Heat Transfer Characteristics of High-Pressure Permanent Magnet Motors

为了降低高压永磁电机的温升,以一台额定功率为1400 kW的高压永磁电机为研究对象,基于计算流体力学和传热学理论,优化了冷却器挡板结构,建立电机三维耦合分析模型,对电机进行流热耦合分析,计算并比较了两种冷却器挡板结构下的电机各个通风道的流体流动及传热特性,从对流传热优化的场协同角度,得出了不同冷却器结构下的电机温升和温度分布规律,为高压永磁电机通风结构优化设计提供参考依据。

To reduce the temperature rise of high-voltage permanent magnet motors,a high-voltage permanent magnet motor with a rated power of 1,400 kW was taken as the research object.Based on computational fluid dynamics and heat transfer theory,the structure of the cooler baffle was optimized.A three-dimensional coupled analysis model of the motor was established,and a fluid-thermal coupled analysis of the motor was conducted.The fluid flow and heat transfer characteristics of each ventilation channel under two different cooler baffle structures were calculated and compared.From the perspective of optimizing convective heat transfer through field synergy,the temperature rise and distribution patterns of the motor under different cooler structures were obtained,providing a reference for the optimization design of ventilation structures for high-voltage permanent magnet motors.