High power factor dimmable lighting system for electrodeless fluorescent lamp

Abstract

The use of the fluorescent lamps without electrodes (electrodeless) has been increasing, because of their features such as lifetime and lumen efficiency, when compared to conventional fluorescent and high pressure sodium (HPS) lamps. This paper presents a luminous flux variation strategy using a Single Ended Primary Inductance Converter (SEPIC), which also provides high power factor correction, to feed electrodeless fluorescent lamps. Since the load is variable a digital compensation is used to meet the control of the specified output voltage in the project, once the dimming characteristic is achieved by varying the SEPIC output voltage. A microcontroller is used in order to allow a suitable control for the converter since it presents features that make possible to obtain dimming capability. The lumens information can be done through wireless system.