一种晶闸管LED调光控制方法及调光电路设计  

A Thyristor LED Dimming Control Method and Dimming Circuit Design

作　　者：林为 胡昌吉[1] 李姗 梁水英 LIN Wei;HU Changji;LI Shan;LIANG Shuiying(Foshan Polytechnic College,Foshan 528137,China)

机构地区：[1]佛山职业技术学院,广东佛山528137

出　　处：《电工技术》2024年第20期11-13,16,共4页Electric Engineering

摘　　要：利用传统晶闸管调光技术对LED光源进行调光存在诸多缺点,对此提出一种晶闸管LED调光控制方法及调光电路。利用晶闸管调光器输出的模拟调光电压控制电源(反激变换器)芯片的开通和关断,将斩波交流电的模拟信号转变为输出到LED的周期性方波(PWM)电流,从而实现晶闸管调光器对LED的数字调光。最后给出了具体的电路及设计建议,并通过仿真进行了初步验证。Conventional thyristor dimming technology has many drawbacks when dimming LED light sources.This work designed a thyristor LED dimming control method and dimming circuit.The method used the analog dimming voltage output by the thyristor dimmer for open/closure switch of the power supply(flyback converter)chip,and converted the analog signal of the chopping AC power into a periodic square wave(PWM)current output to the LED,thereby achieving digitalized dimming of the LED.The specific circuit and design suggestions were given,and preliminary simulative verification was conducted.

关 键 词：晶闸管调光 LED 控制芯片 恒流 PWM 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]