一种智能LED调光控制策略研究

LED照明领域应用调光技术不仅可以进一步减少能源消耗,还可以改善视觉效果。本文设计了一种两级式LED驱动电源,前级Boost变换器实现功率因数校正功能,后级CLCL恒流谐振网络实现LED恒流驱动,针对CLCL恒流谐振网络特性研究了一种智能LED调光控制策略,采用脉冲密度调制对输出电流进行调节,从而实现对LED灯的调光控制,同时为实现对LED智能调光,将Zigbee无线通信技术与脉冲密度调制相结合,实现对LED的智能调光控制,最后搭建一台108W的原理样机验证了所提方案的可行性。

Research on an Intelligent LED Dimming Control Strategy

The application of dimming technology in the LED lighting field can not only further reduce energy consumption,but also improve visual effects.This paper designs a two-stage LED drive power supply,the front-stage Boost converter realizes the power factor correction function,and the latter-stage CLCL constant current resonance network realizes the LED constant current drive.According to the characteristics of CLCL constant current resonant network,an intelligent LED dimming control strategy is studied.Pulse density modulation is used to adjust the output current to realize the dimming control of the LED lamp.At the same time,to realize the intelligent dimming of the LED,the Zigbee wireless communication technology is combined with the pulse density modulation to realize the intelligent dimming control of the LED.Finally,a 108W principle prototype was built to verify the feasibility of the proposed scheme.