Fluorescent Lamp Model for High-Frequency Electronic Ballasts

An electrical circuit model of fluorescent lamps is derived as an aid in designing high-frequency dimmable electronic ballasts. The lamp model accounts for the effects of operating power and filament heating, describing the electrical behavior of the lamp by two voltage equations. Based on the orthogonal array methods, the variation equations of the arc and filament resistances are derived. The coefficients of the equations can be estimated from test data. The verification is performed by implementing a model of a T9-40W lamp with the experimental results. Satisfactory performance is obtained from the experimental results.