Title :
Modified valley fill high power factor electronic ballast for compact fluorescent lamps
Author :
Kheraluwala, Mustansir H. ; El-Hamamsy, Sayed Amr
Author_Institution :
Corp. Res. & Dev., Gen. Electr. Co., Schenectady, NY, USA
Abstract :
A simple, lost cost, high power factor ballast, referred to as the modified valley fill circuit, for compact fluorescent lamps is introduced. This circuit peak charges the valley fill (electrolytic) capacitor from an auxiliary winding on the high frequency ballasting inductor to a fraction of the peak line voltage, where the input power factor is optimized at 0.95. A simple lamp current feedback scheme is employed to keep the lamp current crest factor near 1.7. The overall efficiency is in the range of 87-89%
Keywords :
AC-AC power convertors; electric current control; electrolytic capacitors; feedback; fluorescent lamps; lamp accessories; lighting control; power capacitors; power factor correction; power inductors; power system harmonics; 87 to 89 percent; auxiliary winding; compact fluorescent lamps; electrolytic capacitor; electronic ballast; high frequency ballasting inductor; lamp current feedback; modified valley fill circuit; power factor; Capacitors; Circuits; Costs; Electronic ballasts; Feedback; Fluorescent lamps; Frequency; Inductors; Reactive power; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1995. PESC '95 Record., 26th Annual IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-2730-6
DOI :
10.1109/PESC.1995.474785
