Single stage ballast for high pressure sodium lamps

In this paper will be reported the study and implementation of a single stage high power factor (HPF) electronic ballast for high pressure sodium (HPS) lamps using a LCC filter. In the recent years many authors are working to obtain single stage HPF electronic ballast for fluorescent lamps. Normally 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. The main idea in this work is to present a simple and cheap electronic ballast with HPF for HPS lamps. This solution has the advantage of avoiding the acoustic resonance phenomena, but, in the other hand, it has a high crest factor. Design criteria and simulation results will be also presented in this paper.