一种新型调光电子镇流器  

Novel Control Method for Dimming Electronic Ballast

作　　者：滕妨华[1] 刘晨阳[1] 张仲超[1] 

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《电力电子技术》2004年第5期69-71,共3页Power Electronics

摘　　要：介绍了一种新型的荧光灯调光控制方式,即通过同时调制占空比和开关频率的方式控制荧光灯的输出功率。首先,基于与功率相关的荧光灯模型,通过基波近似的方法得到了控制方程,得出了荧光灯的调光特性。然后,以一个半桥式串联谐振并联负载电路为例,给出了设计步骤及仿真、实验结果。A novel control technique has been developed for high frequency dimming ballast of fluorescent lamps. By modulating the duty-cycle and frequency simultaneously the lamp power can be regulated smoothly and a wide dimming range has been achieved. Based on the power-dependent lamp model, the control equations are derived by fundamental approximation, and then the dimming characteristics of the fluorescent lamp are calculated. An electronic ballast with the half bridge series-resonant parallel-load inverter for the fluorescent lamp was used as an example for illustrating the design procedure. A laboratory circuit is built and tested. The experimental results are presented to verify the theoretical discussions.

关 键 词：镇流器 荧光灯 谐振 调光 占空比调制 

分 类 号：TM923.61[电气工程—电力电子与电力传动]