一种DC/DC电源模块热阻模型建立和散热设计  

Thermal Resistance Modeling and Thermal Design of a DC/DC Power Supply Module

作　　者：牛云飞 干方宇 高明 石健将[1] NIU Yun-fei;GAN Fang-yu;GAO Ming;SHI Jian-jiang(Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学,电气工程学院,浙江杭州310027

出　　处：《电力电子技术》2021年第4期137-140,共4页Power Electronics

摘　　要：随着DC/DC电源模块功率密度的不断提高,良好的散热设计是保证电源可靠工作的前提。首先对所用电路拓扑进行了介绍,然后建立了电源模块的热阻模型,通过对主要热源之间的耦合关系进行分析,对温升进行了计算,并利用Flotherm软件建立热仿真模型来验证热阻模型的正确性。针对热应力集中点,提出热性能优化设计方案,最后实验验证了仿真模型的准确性和优化方案的可行性。With the increasing power density of DC/DC power supply module,good thermal dissipation design is the premise to ensure the reliable operation of power supply.First introduces the circuit topology,and then establishes the thermal resistance model of the power module,by analyzing the coupling relationship between the main thermal sources,the temperature rise is calculated,and the thermal simulation model is established by using Flotherm software to verify the correctness of the thermal resistance model.Finally,the accuracy of the simulation model and the feasibility of the optimization scheme are verified by experiments.

关 键 词：电源模块 热阻模型 热仿真 

分 类 号：TN86[电子电信—信息与通信工程]