用于地铁变流器的平板微热管散热器数值模拟与实验研究

Numerical Simulation and Experimental Study of Flat Microheat Pipe Radiator for Metro Converter

本文将平板微热管应用于地铁变流器IGBT散热器中,设计了一种新型平板微热管散热器,通过对物理模型的合理简化,建立数学模型,利用ICEPAK软件对传统翅片散热器和平板微热管散热器进行数值模拟对比,并通过实验验证计算的正确性。研究结果表明:平板微热管散热器极大提升了散热器散热效率;在极限功率工作条件下,平板微热管散热器的最高温度为70.27℃,比传统翅片散热器降低了25.79℃;理论计算得到IGBT结温为110.23℃,满足IGBT工作要求;数值模拟结果与实验结果基本吻合,最大温度误差为7.07%。

A flat-plate microheat pipe was applied to an IGBT radiator of metro converter,resulting in a new flat-plate microheat pipe radiator design.The mathematical model was established through a reasonable simplification of the physical model.The traditional fin radiator and flat microheat pipe radiator were simulated and compared by ICEPAK software,and the correctness of the calculation was verified via experiments.Results showed that the flat-plate microheat pipe radiator greatly improves the radiation efficiency of the radiator.Specifically,the maximum temperature of the flat-plate microheat pipe radiator was 70.27℃or 25.79℃lower than that of the traditional fin radiator.The theoretical calculation results showed that the IGBT junction temperature was 110.23℃,meeting the working requirements of the IGBT.Furthermore,there is a good agreement between the results of the numerical simulation and experiments,as indicated by the maximum temperature error of 7.07%.Practically,this study provides an important research method that could be a basis for the design and application of flat-plate microheat pipe radiator.