Title :
High-power-factor electronic ballast operating in critical conduction mode
Author :
Có, Márcio Almeida ; Simonetti, Domingos S L ; Vieira, José Luiz F
Author_Institution :
Dept. de Engenharia Eletrica, Univ. Federal do Espirito Santo, Vitoria, Brazil
fDate :
1/1/1998 12:00:00 AM
Abstract :
A high-power factor (HPF) electronic ballast, which exhibits low switching losses, is presented in this paper. The proposed topology is based on a single power-processing stage, which provides high-frequency voltage to fluorescent lamps and HPF to the utility line. The lamps are driven by a self-oscillating LC parallel resonant power converter of great simplicity and attendant low cost and increased reliability. HPF is achieved by using a nonconventional boost power converter operating in critical conduction mode. Theoretical analysis and experimental results for two 40-W fluorescent lamps operating at 50 kHz from a 127-V utility line have been obtained, which demonstrate the high efficiency and HPF of this electronic ballast
Keywords :
fluorescent lamps; harmonic distortion; lamp accessories; power factor correction; power system harmonics; resonant power convertors; switching circuits; 127 V; 40 W; 50 kHz; boost power converter; critical conduction mode; efficiency; electronic ballast; fluorescent lamps; high-power factor; self-oscillating LC parallel resonant power converter; switching losses; Circuit topology; Costs; Electronic ballasts; Fluorescent lamps; Frequency; Inductors; Power factor correction; Reactive power; Resonance; Zero voltage switching;
Journal_Title :
Power Electronics, IEEE Transactions on