电晕风强化大功率LED散热研究  

Research on Heat Dissipation of High Power LEDs via Corona Wind

作　　者：李小华[1] 石云飞 王静[1] 蔡忆昔[1] 赵旭东 LI Xiaohua;SHI Yunfei;WANG Jing;CAI Yixi;ZHAO Xudong(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang Jisngsu 212013,China)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《电子器件》2019年第1期111-115,共5页Chinese Journal of Electron Devices

基　　金：江苏省自然科学基金项目(BK20181446);江苏省动力机械清洁能源与应用重点实验室开放课题项目(QK12001)

摘　　要：针对大功率LED传统散热方式的不足,设计一种"线-网"式离子风散热器。通过实验研究不同放电间隙、过电压、线电极直径、线-线间距下散热器性能的变化。结果表明,在相同网状电极密度下,起晕电压随放电间隙的增加而增加;电荷密度和离子风速随过电压增加呈正比例变化,与放电间隙的平方成反比;当网格密度为3 cm^(-2),放电间隙为5 mm时,采用0.15 mm线径的线电极产生的离子风呈最佳状态;当线-线间隙大于或小于最佳值时,系统散热性能降低。A kind of‘wire-net’ion wind radiator was designed,which aims at the deficiency of traditional heat dissipation mode of high power LED. Experiments were conducted to investigate the variation of the performance of the radiator under different discharge gaps,overvoltages,wire electrode diameters and line gaps. The results show that the corona inception voltage increases with the increase of discharge gap under the same mesh electrode density.The charge density and the ion wind velocity are in a direct proportion with the increase of overvoltage,which are inversely proportional to the square of the discharge gap. When the net density is 3 cm-2 and the discharge gap is 5 mm,the ion wind generated by the 0.15 mm line diameter electrode is the best state. The cooling performance of the system is reduced when the line gap is greater than or less than the optimal value.

关 键 词：强化传热 离子风 电晕放电 大功率发光二极管 

分 类 号：TB61.1[一般工业技术—制冷工程] TN312.8[电子电信—物理电子学]