毕业论文 LED开关电源毕业设计论文.doc

摘要
当今社会,节能环保已成为全人类的共识,因而节能环保的半导体照明和照明器件的智能化成为照明领域的发展趋势。多功能高亮度LED照明灯的设计和推广可以达到环保节能目的。多功能高亮度LED照明灯是由开关电源部分,控制部分和白光LED灯三部分构成。,,并且它不随LED的温度的变化而变化,从而达到稳压限流的效果。在高效率的开关电源的驱动下,,但它的实际亮度已达到普通的40W白光灯的亮度。再利用SCT89C51单片机根据外部环境光线亮度自动调节灯光亮度,实现了照明器件的智能化,实验结果表明,本系统设计的开关电源输出电压为20V,输出电流为2A,LED灯可由单片机根据外部环境光线亮度自动调节灯光亮度,较好地实现了照明灯具的有效节能和亮度控制智能化。
关键词:半导体照明;白光LED;开关电源;高频变压器;STC89C51
Abstract
In contemporary society, energy conservation and environmental protection has e the consensus of all mankind, so energy conservation and environmental protection of semiconductor lighting and lighting devices of intelligence e development trends in the field of lighting. High-Brightness LED lighting design and promotion can reach the purpose of energy conservation and environmental protection. High-Brightness LED lights consist of three parts, the switching power supply, the control, and the White LED lights. Under the effect of switching power supply and control of mon LED, each of the operating voltage is to V, operating current and it does not change with the changeable LED temperature, so as to meet current limit and the effect of regulators. In the driving force of a highly efficient switching power supply, LED lights in the practical work for the total power of W, but its actual brightness has reached 40 W of ordinary white light brightness. Re-used SCT89C51 SCM, in accordance with the external environment lighting brightness, automatically adjusts brightness light, and the lighting of intelligent devices, and then well positioned to enable lighting of the intelligence and energy conservation.
Key words:semiconductor illumination ; white light-emitting diode; switching power supply; high frequency transformer;STC89C51

目录
摘要 I
Abstract II
第1章绪论 1
1
[1] 2
2
美国半导体照明技术的现状及发展趋势 2
3
本章小结 3
第2章白光LED 4
[2] 4