A Modified Electronic Ballast Circuit with Extended Conduction Time

Abstract

This paper proposes an improved Valley-Fill (VF) ballast circuit with current fed resonant inverter driving circuit of for a high power factor VF electronic ballasts. The original VF circuit allows the input current 150 ° to 30 ° transmission, and then from 210 ° to 330 °. Because the continuity and high tensile strength of the total harmonic distortion () results input currents. Fixed VF circuit allows the Angle of conduction further extensions line current 0 ° and 180 ° more than more than 168.86 ° omega t more than 333 ° omega is more than t. This VF circuit also reduces the current spike, compared to conventional VF ballast.