高亮度LED球泡灯研制及其温升分析

Development of the High Bright LED Bulb and Analysis on Temperature Distribution in It

输入LED的电能大部分转化为热能,导致在其结区产生高温,使用大功率LED阵列的高亮度LED灯在LED阵列结区产生的温度更高,而结区高温会严重影响到高亮度LED灯发光的稳定性和使用寿命,因此良好的热结构设计和散热性能是研制高亮度LED的关键问题。研制了一种高亮LED球泡灯,以替代照明用白炽灯。设计了该球泡灯的硬件结构和恒流驱动电路;使用流模拟仿真并分析了灯体内LED阵列的发热及散热情况;实验测试了该球泡灯使用时,灯体内实际散热情况,仿真结果与实验结果吻合良好。仿真与实验结果均表明该球泡灯散热结构合理,散热性能良好,可以满足稳定地高亮照明要求。

The imported electrical energy to LED was changed into heat energy mostly resulting high junction temperature.Because of employing high power LED array,higher junction temperature was created in high bright LED than the low power one.The flux and operating life of high bright LED were affected by its junction temperature,so the proper thermal construction and rejection of heat of high bright LED should be guaranteed during developing it.A kind of high bright LED bulb was developed to replace the electric incandescent lamp for illumination.The structure and the constant current drive circuit of this LED bulb were designed.With the help of software Flow simulation,the temperature distribution of elimination of heat of the LED array in this LED bulb during its operating was simulated and tested;the results of simulation and test of the developed LED bulb agreed well with each other,and the two results all indicated that the developed LED bulb has proper construction for rejection of heat coming from the junction of array of LED,the requirement for high bright illumination can be met because of its excellent super-performance.