混合型调光电子镇流器的研究

Mixed Mode Control for Dimming Electronic Ballast

介绍了一种新型的荧光灯调光控制方式,即通过占空比调制和频率调制相结合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 new control technique has been developed for high frequency dimming of fluorescent lamps using the integration of duty-ratio modulation and frequency modulation to regulate lamp power.Based on the power-dependent lamp model,the control equations are derived by fundamental approximation,and then dimming characteristics of the fluorescent lamp can be calculated.An electronic ballast with the half bridge series-resonant parallel-load inverter for the fluorescent lamp is used as an example for illustrating the design procedure.Simulated and laboratory circuits were build and tested.The results were presented.