大功率LED场地照明散热设计研究
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摘要
LED是一种半导体发光器件,相对于传统光源具有节能、环保、寿命长等诸多优点,正发展成为新一代照明光源,但LED发光同时会产生较多热量,芯片局部热流密度可达100 W/m~2。若无法将产生的热量及时散出,将会对LED正常工作带来不利影响。通过分析现有大功率LED灯散热方式、封装结构等设计方案,提出一种可用250 W白光LED替代500 W场地照明金属卤素灯的大功率LED场地照明用灯,并能有效控制芯片结点温度小于85℃。
LED is a kind of semiconductor luminous device. Compared to traditional light sources,LED has such advantages as energy saving, environmental protection and long service life. So it is being developed as a new generation of light source, but LED will produce a lot of heat during the illumination time. The partial heat flux density of the core is up to 100 W/m2. It will bring adverse effects on LED normal work if there is no way to dissipate the heat inside. By the analysis of the design schemes of the current large power LED with the dissipation ways and packaging structure, finally a kind of large power LED field lighting was proposed to use LED with 250 W instead of the halogen lamp with 500 W,and the junction temperature can be controlled less than 85℃.
LED is a kind of semiconductor luminous device. Compared to traditional light sources,LED has such advantages as energy saving, environmental protection and long service life. So it is being developed as a new generation of light source, but LED will produce a lot of heat during the illumination time. The partial heat flux density of the core is up to 100 W/m2. It will bring adverse effects on LED normal work if there is no way to dissipate the heat inside. By the analysis of the design schemes of the current large power LED with the dissipation ways and packaging structure, finally a kind of large power LED field lighting was proposed to use LED with 250 W instead of the halogen lamp with 500 W,and the junction temperature can be controlled less than 85℃.
引文
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[2]汪双凤,胡艳鑫,陈金建.应用于LED灯具散热的平板热管传热特性[J].工程热物理学报,2012,33(8):1371-1372.
[3]柴伟伟,陈清华,李琳红.大功率LED灯珠与散热器直焊结构散热效果分析[J].发光学报,2011,32(11):1171-1175.
[4]http://www.bbs.ledcax.com/forum,php?mod=viewthread&tid=51872.
[5]Shin M W.Thermal design of high-power LED package an system.Proc.SPIE,2006,6355:9-21.
[6]鲁祥友.照明用大功率LED热管散热器的研究[D].上海理工大学,2009:3-4.
[7]庄骏,张红.热管技术及其工程应用[M].北京:化学工业出版社,2000.
[8]吴玲,傅文彪.半导体照明[M].沈阳:辽宁科学技术出版社,2006.
[9]Grover G M,Cotter T P,Erikson G F.Structure of very high thermal conductance[J].Applied Physics,1964,35(10):3072.
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