Title :
Low-cost high-power-factor electronic ballast based on the self-oscillating buck-boost inverter
Author :
Ribas, J. ; Alonso, J.M. ; Calleja, A.J. ; Corominas, E.L. ; Rico-Secades, M.
Author_Institution :
Dept. de Ingenieria Electr. y Electron., Oviedo Univ., Spain
fDate :
6/22/1905 12:00:00 AM
Abstract :
In this paper, a new solution to implement and control a single-stage electronic ballast based on the integration of a buck-boost power factor correction stage and a half bridge resonant inverter is presented. The control signals are obtained from the inverter resonant current by means of a saturable transformer. Core saturation is used to control the required dead time between the control pulses of both switches. Since no special integrated circuits are required to control the ballast, the total number of components is minimized. Analysis and basic design guidelines are presented in the paper together with experimental results obtained from a laboratory prototype
Keywords :
DC-AC power convertors; DC-DC power convertors; bridge circuits; circuit oscillations; fluorescent lamps; invertors; lamp accessories; power factor correction; power transformers; resonant power convertors; switching circuits; buck-boost power factor correction stage; component number minimisation; core saturation; dead time; design guidelines; half bridge resonant inverter; inverter resonant current; saturable transformer; self-oscillating buck-boost inverter; single-stage electronic ballast; switch control pulses; Bridge circuits; Circuit faults; Electronic ballasts; Guidelines; Power factor correction; Pulse transformers; Resonance; Resonant inverters; Switches; Transformer cores;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth Annual IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5864-3
DOI :
10.1109/APEC.2000.826164
