基于恒压恒流的RGBW照明系统研究  

Research on RGBW Lighting System Based on Constant Voltage and Constant Current

作　　者：周伟杰 ZHOU Weijie(Liming Vocational University,Quanzhou 36200,China)

机构地区：[1]黎明职业大学智能制造工程学院,福建泉州362000

出　　处：《广东轻工职业技术学院学报》2023年第3期7-12,共6页Journal of Guangdong Industry Polytechnic

基　　金：2022年度黎明职业大学校级一般课题(自然科学类)(LZ202224)。

摘　　要：针对现有的RGBW LED灯具颜色控制精度低、调光深度浅、电路复杂、成本较高等问题,提出了一种新型的RGBW全彩LED控制方案。该方案中的RGB光和W白光分别通过反激驱动电源的恒压(CV)和恒流(CC)模式进行控制;当负载电流低于预设的恒流点时,驱动电源以CV模式工作,反之以CC模式工作;RGB目标色彩根据推导出的混光方程组进行控制。实验结果表明,该方案不仅可以满足日常白光照明时的恒流输出,实现RGB情景照明时的高精度目标颜色控制,而且具有优良的调光深度以及电路简单、低成本的优点;因此,该方案可为研制RGBW LED照明灯具提供良好参考。Aiming at the problems of low color control accuracy,shallow dimming depth,complex circuit and high cost of existing RGBW LED lamps,a new RGBW full-color LED control scheme is proposed.In this scheme,RGB light and W white light are controlled by constant voltage(CV)and constant current(CC)modes of flyback driving power supply respectively;When the load current is lower than the preset constant current point,the driving power supply works in CV mode,on the contrary,it works in CC mode;RGB target color is controlled according to the derived light mixing equations.The experimental results show that the scheme can not only meet the constant current output in daily white light lighting and realize the high-precision target color control in RGB scene lighting,but also has the advantages of excellent dimming depth,simple circuit and low cost;Therefore,the scheme can provide a good reference for the development of RGBW LED lighting lamps.

关 键 词：RGBW 色坐标 调光深度 恒压恒流 照明系统 

分 类 号：TM923.34[电气工程—电力电子与电力传动]