动车组IGBT模块高效散热器设计

Design of High Efficiency Cooler for IGBT Module in CRH2

针对目前CRH2型高速动车机组变流器中所用的大功率IGBT模块,本文设计了4种动车组牵引变流器用高效散热器,通过应用FLUENT对设计的4种散热器模型进行CFD模拟,综合分析对比模拟结果,确定出cha-30×10为其中性能最优的散热器模型,对性能最优的模型进行二次优化,综合判定最优方案为160°折角散热器,并得到了散热器最高温度、最大热阻、压降和冷却液入口流量的关系。仿真结果表明:在入口质量流量为0.1 kg/s的工况下,cha-30×h0(160°)散热器最高温度比shun-20×10降低3 K、最大热阻减小7.8%。

For the high-power insulated gate bipolar translator(IGBT)module,which is presently used in the converter of CRH2,four types of high-efficiency cooler for the traction converter of CRH2 were designed.Using FLUENT to simulate four types of cooler models and comprehensively analyzing and comparing the simulation results,cha-30×10 was determined to be the best cooler model,and the optimal model was quadratically optimized.The optimal scheme was determined to be the 160°cooler,and the relationship between the maximum temperature,maximum thermal resistance,pressure drop,and the flowrate of coolant was obtained.With an inlet mass flow rate 0.1 kg/s,the simulation results show that the maximum temperature of the cha-30×10(160°)cooler is 3 K lower than that of shun-20×10,and the maximum thermal resistance is 7.8%lower than that of shun-20×10.