热阻网络法在半导体照明光源热分析中的应用

Application of Thermal Resistance Network in Thermal Analysis of LED Lamps

摘要:

热阻网络法在传统热阻定义的基础上,简化了系统的计算模型。文章在分析半导体照明系统内部各器件热阻的基础上,提出了一种计算各点温度的热阻网络模型。利用一维热阻网络拓朴关系进行了热场的计算和分析,并与有限元仿真结果进行了对比。通过验证表明,采用该方法得到的结点温度与有限元仿真的结果相差不超过5%,模拟结果与热阻网络模型预测的结果吻合得很好,显示该模型具有较高的精确度。这种热阻网络拓朴分析技术可在某种程度上应用于发光二极管(LED)组件甚至复杂的照明系统的热学分析。

Abstract:

Thermal resistance network based on traditional thermal resistance significantly simplifies the numerical simulation module.Based on analyzing the thermal resistance of every component inside LED illumination system,a kind of thermal resistance network module is proposed to calculate the temperature of every node.Using one-dimensional heat resistance network topology the thermal calculation and analysis results are compared with the finite element simulation results.The error between the result obtained fro...