An analysis about valley fill filters applied to electronic ballasts

This paper presents a detailed analysis about valley fill filters applied to power factor (PF) correction of electronic ballasts. Comparative results about input current THD are done in this study, verifying if it meets the IEC 61000-3-2 standard requirements, that determines the maximum amplitude of each harmonic component from 2/sup nd/ up to 39/sup th/. Power factor (PF), total harmonic distortion (THD), crest factor (CF), auxiliary circuit losses, and operation principles are also presented.