基于补偿变压器的LED路灯调光系统  

LED street lamp dimming scheme based on compensation transformer

作　　者：海涛[1] 时雨 李俊杰 陈永鉴 刘振语 HAI Tao;SHI Yu;LI Junjie;CHEN Yongjian(School of Electrical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学电气工程学院,广西南宁530001

出　　处：《广西科技大学学报》2020年第3期45-49,66,共6页Journal of Guangxi University of Science and Technology

基　　金：国家自然科学基金项目(51867003);广西重点研发计划项目(桂科AB16380193)资助.

摘　　要：为解决目前LED路灯调光系统中传输距离较短、成本较高和极易受外界干扰等问题,设计了一种基于补偿变压器的LED路灯调光系统.该系统通过对补偿变压器二次侧的不同接法,按要求微小改变电压波形,由电网线路传输至路灯终端,与单片机建立连接;单片机根据电压波形内容,输出对应的PWM波形,使LED驱动电路调节路灯亮度.实验结果表明:补偿变压器可输出有效平滑的电压波形,实现1 600 m内稳定可靠的远距离LED路灯调光.In order to solve the problems of short transmission distance,high cost and susceptibility to external interference in the current LED street light dimming system,an scheme of LED street light dimming based on compensation transformer was designed. The compensation transformer is used as the control terminal,and changing the voltage waveform of the power grid slightly. It is transmitted to the street lamp terminal through the line to connected to the single chip microcomputer,analyzing the handshake protocol and control strategy at the control end,and output different PWM waveforms to make the LED driver circuit adjust the street light brightness. The experimental results show that the compensation transformer can output an effective and smooth voltage waveform,and achieve a stable and reliable long-distance LED street light dimming at 1 600 m.

关 键 词：LED 路灯 补偿变压器 调光 握手协议 

分 类 号：TU113.666[建筑科学—建筑理论] TP273[自动化与计算机技术—检测技术与自动化装置]