用于直流供电LED路灯的载波通信控制系统设计

针对集中直流供电LED路灯系统的灯光调节和直流载波通信等问题，设计了一种LED路灯调光和载波通信控制电路。该电路通过单片机产生PWM控制信号并利用电力载波通信方式实现对路灯亮度调节。最后在理论分析、参数设计的基础上搭建了由四个3×1W LED灯组成的小型路灯系统，实现了路灯亮度调节、定时亮灭等功能，有效减少了系统耗能。

Design of carrier communication control system for DC-powered LED streetlight

In view of the problems of light-control and DC carrier communication in the central DC powered LED streetlight system, this paper designs a control circuit for LED streetlight dimming and DC carrier communication. In this circuit, the luminance control of the streetlight is implemented by means of PWM control signal generated by single-chip micro-computer over the electrical power carrier communication. And finally, a small-size streetlight system composed of four 3×1W LED lights is set up ,based on the theoretical analysis and parameter design , which realizes the streetlight luminance dimming ,timing on and/or off and other functions, thus reducing the system’s energy dissipation, ffectively.