一种电动汽车充电模块的微通道散热器特性研究

The Characteristic Research on the Microchannel Radiator of an Electric Vehicle Charger Module

根据电动汽车充电机中大功率模块IGBT板的产热特性,设计了一种具有辐射状流道的散热器,并通过fluent数值模拟,对其入流速度、出口宽度以及一级流道的个数等参数对散热器散热性能的影响进行分析。研究表明:(1)辐射状流道的散热器使得IGBT板表面温度分布较均匀,从中心向外,温度成逐渐递增趋势,越靠近中心部位,IGBT板的散热效果越好。(2)入口流速较大、出口较宽的散热器散热性能较好;一级流道的个数为8的散热器与一级流道为4的散热器相比,流道分布范围内的温升相对较小,散热性能较好。

According to the thermal characteristics of the IGBT module as apart of electric vehicle, a new-type microchannel radiator with radial flow paths is designed, and analyzed the influence of the inflow rate, exit width and the first-class port number on its cooling peoCormance through numerical simulation by the fuent software. The research shows that： （ 1 ）The radiator with radial flow makes the IGBT module suuface temperature distribution more even and has gradually increasing trend outward from the center, and the more close to the center of IGBT module, the better the performance of heat dissipation is. （2）The performance of radiator is better when the radiator with larger inlet velocity and wider export; radiator whose first-class port number is 8 has lower temperature rise and better cooling performance within the scope of flow field distribution compared with the one with 4first-class port number.