Dimming method for lighting systems with integral compact fluorescent lamps
Abstract
This paper presents a 200 W high power factor dimming system for integral compact fluorescent lamps (electronic ballast + compact fluorescent lamp) using two cascaded converters. The first stage is a boost converter operating in critical conduction current mode that supplies the second stage. The second stage is a buck converter, which operates in continuous conduction current mode and controls the output voltage for feeding an integral compact fluorescent lamp group. The characteristics of integral compact fluorescent lamps are presented in order to implement the system. Simulation, design equations, and experimental results of the implemented prototype are presented to validate the proposed idea.
Key words: power factor correction, dimming, compact fluorescent lamps, electronic ballasts.Downloads
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