鉴于大家对自动化PLC十分关注，我们编辑小组在此为大家搜集整理了“电梯LED照明恒流源控制系统”一文，供大家参考学习
论文编号:DQ241 论文字数:10056,页数:35
摘要：在当前全球能源短缺背景下，节约能源是我们面临的重要的问题。在照明领域，这种具有高节能、寿命长、多变换、环保的LED发光产品的应用正吸引着世人的目光。LED作为一种新型的绿色光源产品，必然是未来发展的趋势。二十一世纪将进入以LED为代表的新型照明光源时代。LED照明的应用离不开它所需要的驱动控制电路，通过驱动电路来获得良好而平稳的电流，使LED照明更加稳定，满足各种场合的应用要求，同时可以延长LED的使用寿命。
本文介绍了一种用于提高LED光源稳定性的高精度恒流源控制系统, 该系统基于STC单片机设计, 由BUCK电路、BOOST电路、6V蓄电池充电电路和电压放大电路组成。除此之外，该系统还配备一个6V蓄电池作为应急备用电源。软件中采用多层分段控制策略。该系统输出10路恒定电流30mA,恒流精度达到±1mA。
关键词: 发光二极管；稳定性；恒流源
Abstract:In the current background of global energy shortages, energy conservation is the important issue we face. In the area of lighting, the application of LED products which has the advantage of high power conservation, long life, multi-transformation, environmental are attractive to the world''''s attention .As a new green lighting products, LED is the trend of development in the future .We Will enter a new lighting era which is represented by the LED in the 21st century. LED drivers are necessary in the application of LED lighting. They can supply constant output current and make the LED light even, and also can make the LED’s life longer.
In this paper, we introduce the high-precision constant current source control system which can enhance the stability of the LED lighting source. The system is based on the STC single-chip processor, consists of the Buck circuit, and the BOOST circuit, and the rechargeable circuit of 6V batteries, and voltage amplifier circuit. In addition, the system is also equipped with a 6V battery power as an Emergency Backup Power. Multi-section control strategy is used in the software. This system outputs 10 channels of 30mA constant current, and constant current accuracy reaches ± 1mA.
Key words: LED；stability；constant-current source
