线-网电极离子风强化LED散热的试验研究

发布时间：2018-03-01 06:15

  本文关键词： 强化传热 离子风 电晕放电 大功率LED 结温　出处：《电子器件》2016年06期 　论文类型：期刊论文

【摘要】：针对功率型LED芯片传统散热方案能耗高、散热效率低的缺陷,设计了一种线-网电极离子风发生器,并通过试验研究其工作性能。以LED芯片的引脚温度和离子风风速为目标参量,探寻发生器在不同线电极数、放电间距及电源极性时的散热系统的工作特性.结果表明:发生器采用8线电极形式,放电间距为10 mm,电晕电流为0.3 m A时,散热效果最佳,系统功耗较低;相同电压下,负电晕放电时产生的离子风速高于正电晕放电;与自然对流方式相比,LED芯片引脚温度最大降幅为36℃,散热效果较为明显.
[Abstract]:Aiming at the disadvantages of high energy consumption and low heat dissipation efficiency in the traditional heat dissipation scheme of power LED chip, a line-grid electrode ion wind generator is designed. With the lead temperature of LED chip and the wind speed of ion wind as the target parameters, the number of electrodes in different lines of the generator is explored. The working characteristics of the heat dissipation system with discharge spacing and polarity of power supply are obtained. The results show that when the generator adopts the form of 8-wire electrode, the discharge distance is 10 mm, the corona current is 0.3 Ma, the heat dissipation effect is the best, and the power consumption of the system is low. The ion velocity of negative corona discharge is higher than that of positive corona discharge. Compared with natural convection mode, the maximum drop of lead temperature of LED chip is 36 鈩，

本文编号：1550754