摘要
为满足LED散热课程实验教学环节中学生技能培养的需要,以6颗LED组装成的散热模块为实验对象,并将单颗LED在SSP8810-S型测试系统中测得的数据拟合,得到不同驱动电流下发热功率、参考点温度分别与芯片结温的关系式,以此为工作原理,设计并搭建出一套可实现LED散热模块总热阻测量的学生实验系统。该实验系统操作简单,成本低廉,能通过改变LED驱动电流、空气流速和环境温度等关键影响因素,获取LED结温和总热阻的变化趋势,且实验数据有效可靠,展现的客观规律有助于学生对散热设计与分析方法的学习和理解,值得在LED散热相关课程的实验教学中推广使用。
In the experimental teaching of Source and Lighting major, it is urgent to improve the students＇ skill training about LED thermal design and analysis. A heat dissipation module with six LEDs was chosen to be the experiment objects. And using SSP8810-S type multi-test system, the relationship calculating formulas between heat powers or reference point temperatures and junction temperatures of one LED sample were obtained through test data fitting. Based on these relationship calculating formulas, an experimental system was designed and assembled for measuring total thermal resistance of LED module. This experimental system has the advantages of simple operation and low cost. Further more, through changing LED drive current, airflow velocity and ambient temperature, the varying trend of junction temperatures and total thermal resistances can be found. And the objective laws, demonstrated by above right and effective experimental data, will help students to study and understand the methods of thermal design and analysis. Therefore, this experimental system is worth to widely apply in experimental teaching of related courses.
出处
《实验技术与管理》
CAS
北大核心
2013年第12期77-81,共5页
Experimental Technology and Management
基金
天津市应用基础及前沿技术研究计划(10JCZDJC15400)
天津工业大学"师生合作"教学资源建设课题(2011-SYJ-020)
天津工业大学"十二五"规划教改重点研究项目(12-Z-12)
关键词
LED散热
实验系统
热阻测量
LED heat dissipation
experimental system
thermal resistance measurement
