摘要
针对功率型LED芯片现有散热方案的缺陷,设计了一种"针-网"式离子风散热IWC(Ionic Wind Cooling)系统。并通过试验对不同曲率半径、分布密度的针电极结构以及不同电晕放电控制方式下IWC系统作用于功率型LED的散热性能进行了测试。采用红外热像仪测得了离子风对于发热体强化传热作用下的系统温度分布。结果表明:IWC系统的散热效果显著,针电极曲率半径为80μm、针电极间距为7.5 mm时,散热效果最佳;电晕功率为3 W时,IWC系统能在较短时间内降低LED芯片引脚温度。
A needles-net type IWC system（ Ionic Wind Cooling System） was designed for high power LED cooling because of the constraints of traditional heat dissipation methods. The working performance of the IWC system was investigated experimentally under different generator structure and working parameters. The temperature distribution of the cooling system was measured by infrared thermal imager. The results indicate that the ionic wind has good cooling performance for high power LED chip. Cooling device can achieve the best cooling effect under 80 μm tip radius of curvature and 7.5 mm needle spacing. It is also found that when the corona power is 3 W,the chip pin temperature can be reduced in a short time.
作者
李小华
赵旭东
王静
蔡忆昔
李慧霞
赵思钰
LI Xiaohua;ZHAO Xudong;WANG Jing;CAI Yixi;LI Huixia;ZHAO Siyu(School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China)
出处
《电子器件》
CAS
北大核心
2018年第3期753-757,共5页
Chinese Journal of Electron Devices
基金
江苏大学高级人才科研启动基金项目(5503000025)
关键词
强化传热
离子风
电晕放电
大功率LED
结温
enhanced heat transfer
ionic wind
corona discharge
high-power LED
junction temperature
