A Low Cost Single Stage Electronic Ballast Family For High Pressure Sodium Lamps

In the recent years many authors [1-4] are working to obtain single stage HPF electronic ballast for fluorescent and HID lamps to obtain cost reduction and to comply with international standard requirements. Usually to obtain HPF in electronic ballast for high pressure sodium lamps a Power Factor Preregulator (PFP) is used between the mains and the electronic ballast [5]. In this paper will be reported the study and implementation of two single stage high power factor (HPF) electronic ballasts for high pressure sodium (HPS) lamps using a LCC filter, one using a half-bridge inverter and the second one using a full-bridge inverter. The main idea in this work is to compare two simple electronic ballasts topologies with HPF for HPS lamps working with a 220 VRMS mains voltage. Design criteria, simulation and experimental results will be also presented for a full bridge inverter in the final paper.