高速动车组辅助变流器箱体的热仿真设计方法  

Thermal Simulation Design Method for the Auxiliary Converter Case of High-Speed EMU

作　　者：杨宁[1] 宋术全[1] 李红[1] 

机构地区：[1]中国铁道科学研究院机车车辆研究所,北京100081

出　　处：《中国铁道科学》2013年第3期87-92,共6页China Railway Science

基　　金："十一五"国家科技支撑计划项目(0991JL0203)

摘　　要：基于热传递基本原理的高速动车组辅助变流器箱体热仿真设计流程主要包括建立几何模型、设置仿真初始条件、网格划分及稳态求解计算3个环节。根据辅助变流器的基本技术参数,并结合模拟及混合信号仿真软件Saber对辅助变流器主电路的仿真结果,给出辅助变流器中变压器、电抗器和绝缘栅双极型晶体管等主要发热器件功率损耗的计算公式。以某高速动车组辅助变流器为例,采用计算流体力学软件Flotherm,按照辅助变流器箱体热仿真设计流程,得到额定工况下辅助变流器箱体的温度场和流场分布结果,并制成辅助变流器样机。对比变压器线包和铁芯及功率模块散热片样机实测结果与仿真结果,验证了辅助变流器箱体热仿真设计方法的可行性。Based on thermal transmission fundamental, the thermal simulation design flow of high-speed EMU auxiliary converter case mainly includes 3 steps, geometric modelling, simulation initial conditions setting and steady state solving after meshing. According to the basic technical parameters of auxiliary converter, and combined with the simulation results of auxiliary converter main circuit by analog and mixed signal simulation software Saber, the power consumption computational formulas for the main heat- ing elements such as transformer, inductor and insulated gate bipolar transistor in auxiliary converter are provided. Taking certain high-speed EMU auxiliary converter as an example, and according to the thermal simulation design flow for auxiliary converter case, the temperature field and flow field distribution results of auxiliary converter case under rated condition are obtained by computational fluid dynamics software Flotherm, and a prototype of auxiliary converter is made. Actual measurement results and simulation re- sults of transformer coil and core as well as the heat sink of power module are contrasted, and the feasibili- ty of the thermal simulation design method for auxiliary converter case has been verified.

关 键 词：辅助变流器 热仿真设计 发热器件 功率损耗 温度分布 高速动车组 

分 类 号：U266.2[机械工程—车辆工程] U264.37[交通运输工程—载运工具运用工程]