Trabalho apresentado em evento
Dimmable electronic ballast with high power-factor SEPIC preregulator, for multiple tubular fluorescent lamps
Fecha
2004-11-29Registro en:
PESC Record - IEEE Annual Power Electronics Specialists Conference, v. 5, p. 4043-4049.
0275-9306
10.1109/PESC.2004.1355191
WOS:000224587600667
2-s2.0-8744223351
6427185658143370
Autor
Universidade Estadual Paulista (Unesp)
Resumen
An electronic ballast for multiple tubular fluorescent lamps is presented in this paper. The proposed structure features high power-factor, dimming capability, and soft-switching to the semiconductor devices operated in high frequencies. A Zero-Current-Switching - Pulse-Width-Modulated (ZCS-PWM) SEPIC converter composes the rectifying stage, controlled by the instantaneous average input current technique, performing soft-commutations and high input power factor. Regarding the inverting stage, it is composed by a classical resonant Half-Bridge converter, associated to Series Parallel-Loaded Resonant (SPLR) filters. The dimming control technique employed in this Half-Bridge inverter is based on the phase-shift in the current processed through the sets of filter + lamp. In addition, experimental results are shown in order to validate the developed analysis.