Design of a digital controller for high frequency HID lamp ballast

This paper presents the analysis, control strategy and realization of a digital frequency controller of a two stage ballast for HID Lamps. First, the small signal phasor model of the LCSCP resonant inverter is established and verified. Based on this model, a dobule loop digital compensator is desigened to control the current and power of the lamp. Then the… (More)