Analysis of lamp-ballast interaction using the multi-frequency-averaging technique

In recent literature, several small-signal dynamic models for fluorescent lamps have been presented. These models have been used to analyze the lamp-ballast interaction for linear high frequency electronic ballasts. In the present paper, a new analysis method based on the generalized multi-frequency averaging technique is proposed. This method allows obtaining the small-signal dynamic model of an inverter in a straightforward way, even when the inverter behavior is not fully linear. The proposed analysis procedure is illustrated using an example. The frequency response of the small-signal transfer functions obtained with this method are compared with those experimentally measured using a laboratory prototype.