基于有限元法的高频开关电源PCB热仿真研究  

Thermal Simulation and Research of High-frequency SMPS PCB Based on FEM

作　　者：杨晶晶[1] 王立龙[1] 

机构地区：[1]南京理工大学自动化学院,江苏南京210094

出　　处：《电源世界》2014年第11期27-29,32,共4页The World of Power Supply

摘　　要：为提高电源工作的可靠性,论文提出通过安装热管散热器的方法来降低高频开关电源PCB的节点温度。基于有限元方法建立了热管模型以及高频开关电源PCB模型,对热管管径以及安装两种散热器的高频开关电源PCB进行热仿真分析。热分析结果表明:在一定功率范围内,管径越大,散热器散热效果越好;安装热管散热器的高频开关电源PCB上器件温度明显低于安装传统散热器,最大温差达到33°C。实际中在不考虑强迫风冷散热设计时可以对PCB进行优化,以及采用热管散热器对高频开关电源进行有效散热。To improve the reliability of power supply operation, the paper proposes a method by installing a heat pipe radiator to reducc temperature in junction for high-frequency SMPS PCB. It establishes the model of heat pipes and high-frequency SMPS PCB based on FEM software. It simulates the heat pipe diameter and the PCB of two kinds of heatsinks. Thermal analysis results show that： in a certain power range, the larger the diameter, the better the cooling effect; the temperature of PCB device is significantly lower by installing heat pipe radiator than traditional radiator and the maximum temperature difference reaches 33℃. The PCB optimized and the use of heat pipe radiator can lead to a effective heat dissipation without considering the forced air cooling in practice.

关 键 词：高频开关电源 热管散热器 热分析 有限元法 

分 类 号：TN86[电子电信—信息与通信工程]