Title :
A low cost high power factor electronic ballast
Author :
Brioschi, Ricardo O. ; Lamego, Marcelo M. ; Vieria, J.L.F.
Author_Institution :
Dept. do Engenharia Eletrica, Univ. Fed. do Espirito Santo, Vitoria, Brazil
Abstract :
This paper presents a low cost high power factor electronic ballast designed to drive two series connected fluorescent lamps. Low cost is achieved by using a single power processing stage based on a self-oscillating technique. A boost converter operating at discontinuous conduction mode naturally provides high power factor to the utility line. An LC parallel resonant converter yields a high frequency unmodulated sine wave current to drive the fluorescent lamps. This electronic ballast operates above the resonant frequency to perform zero voltage switching, which increases the efficiency. Experimental results have been obtained for two series connected 40 W fluorescent lamps operating at 40 kHz switching frequency from 127 V +/-10%, 60 Hz utility line. The results confirm that the proposed electronic ballast presents high power factor and high efficiency
Keywords :
DC-DC power convertors; fluorescent lamps; lamp accessories; power factor correction; resonant power convertors; switching circuits; 127 V; 40 W; 60 Hz; LC parallel resonant converter; boost converter; discontinuous conduction mode; efficiency improvement; high efficiency; high frequency unmodulated sine wave current; high power factor electronic ballast; low cost; self-oscillating technique; series connected fluorescent lamps; single power processing stage; switching frequency; utility line; zero voltage switching; Acoustic noise; Costs; Electronic ballasts; Fluorescent lamps; RLC circuits; Reactive power; Resonance; Resonant frequency; Switching frequency; Zero voltage switching;
Conference_Titel :
Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-4067-1
DOI :
10.1109/IAS.1997.626392
