文档介绍：上海交通大学
硕士学位论文
大功率LED灯具散热系统的设计和研究
姓名:姬文飞
申请学位级别:硕士
专业:机械工程
指导教师:许黎明;严华锋
20090401
上海交通大学工程硕士学位论文摘要
摘要
发光二极管(简称 LED)具有不含汞、环保、高效、长寿命、节能等优点,被认
为是第四代照明光源。目前 LED 按照量产的水平,大功率 1W 的LED 发光效率已
经超过 100 lm/W,超过目前大多数传统光源。近年来,LED 因为其高效率和环保的
特性,已经被广泛应用于道路照明、景观照明和其他一些通用照明工程。许多 LED
照明产品被开发和应用于照明工程。但是 LED 照明产品的质量参差不齐,尤其是散
热结构设计缺陷导致性能的严重衰减。
在本文的研究中,针对 LED 散热系统进行了研究旨在设计开发适用于未来道路
照明需求的 LED 散热系统。其中主要研究内容和成果如下:
采用 JEDEC51-1 的标准,使用目前精度最高的 T3ster 设备测试了一些典型的
LED 灯具和 LED 封装体的散热性能,测试比较了 LED 封装体的工艺与材料和 LED
灯具结构对于灯具整体散热性能的影响。
基于实验数据和理论原理,采用热学仿真软件,设计开发了 LED 路灯灯具,提
出了 LED 路灯最佳的散热结构方案。同时对路灯灯具的散热性能做了测试。实验结
果与设计一致。整个灯具的热阻低于 9°C/W, 大大优于目前一般 LED 灯具 16°C/W。
可以保证 LED 的结温温升小于 25°C 以下,保证了 LED 灯具 50000 小时的寿命。
光衰与结温的关系曲线和 LED 路灯灯具的光衰情况也作了测试,证明最终优化
的LED 散热结构可以保证 LED 灯具的寿命。
关键词: LED,散热系统,结温,道路照明,热流体仿真技术
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上海交通大学工程硕士学位 ABSTRACT
ABSTRACT

Light emitted diode (abbr. LED) is regarded as the fourth generation of
lighting source with the advantages of no-mercury, environment-friendly,
high efficiency, long-life and energy saving characteristics. For the
commercial production, the luminous efficiency of LED is more than 100
lm/W, which is better than the most of the present lighting source. In recent
years, LED has been widely employed in applications of the street lighting,
landscape lighting and other general lighting projects for its high luminous
efficiency and environment-friendly characteristics. A lot of new LED
lighting fixtures are developed and employed in the lighting projects.
However, the qualities of LED fixtures are highly variable and poorly
performing, due to the poor heat dissipating structure of LED fixture.
In the present study, we focus on the study and design of the LED street
light with high heat dissipating performance for the future street lighting. The
main results can be concluded as following:
1) We have tested some typical high power LED fixtures and LED
packages and obtained their p-n junction temperature (