航空照明功率型LED结温的小电流K系数测量法  

A little current K-factor method for measuring junction temperature of aviation lighting power LED

作　　者：于孟诚[1] 李湘宁[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学技术》2012年第3期371-375,共5页Optical Technique

摘　　要：功率型LED已经越来越多地运用于航空照明领域,迅速准确地获得LED的结温对航空灯具的散热设计显得极为重要。介绍了一种运用小电流K系数测量LED结温的方法。利用了LED半导体芯片的伏安特性,通过构建测量系统获得LED两端瞬间压降值来算出LED的结温。具有获得LED结温快速、准确、非破坏性等特点。Power LED lighting has been more and more used in the field of aviation.That rapid and accurate access to the LED junction temperature is extremely important to the thermal design of aviation lamps.A kind of little current K-factor method of measuring LED junction temperature is introduced.The LED semiconductor chip volt-ampere characteristics are used.Instantaneous voltage drop of LED is obtained through the building system of the LED measurement to calculate LED junction temperature.This method can obtain LED junction temperature more rapidly and more accurately.

关 键 词：航空照明 LED结温 正向压降 小电流K系数 

分 类 号：V242.2[航空宇航科学与技术—飞行器设计]