基于Icepak的机车牵引变流器热设计

以某机车牵引变流器散热系统为研究对象,对其功率模块和其他热敏感度高的关键部件热损耗进行分析。针对该变流器的整体布局特征,提出各功率模块采用独立风道的方式进行冷却,并在风机的入口前设计导流装置,将各模块的冷却风量按功耗的比例进行分配,均衡冷却效果。采用Icepak软件计算变流器内部的流场分布和功率模块的温度分布,结果表明:各关键部件的散热都能满足设计要求,各功率模块的冷却效果也较为均衡。通过温升试验验证,试验结果与仿真结果基本吻合,验证了方案的可行性。

Thermal design of locomotive traction converter based on Icepak

Taking the heat dissipation system of a locomotive traction converter as the research object,the heat loss of its power module and other key components with high thermal sensitivity are analyzed.Aiming at the overall layout characteristics of the converter,each power module is cooled by an independent air duct.Furthermore,the guiding device is designed before the entrance of the fan,the air volume of each cooling module is distributed according to the proportion of power consumption to balance the cooling effect.By using the Icepak software to calculate the flow distribution of converter interior and temperature distribution of power module,the results show that the cooling of all key parts satisfy the design requirement,and the cooling effect of each power module is more balanced.Finally,through the temperature rise test,the test results are in good agreement with the simulation results,and the feasibility of the scheme is verified.