An improved high-intensity discharge lamp model including acoustic resonant effect on the lamp arc resistance

An improved physical high-intensity discharge lamp model that combines the concept of acoustic resonance prediction based on the geometric structure of the lamp, energy balance equations, and lamp arc resistance modeling is proposed. It can be incorporated into a PSpice model for prediction of lamp voltage and current under both low and high frequency operations. In particular, variation of lamp arc resistance due to acoustic resonance at high-frequency operation is incorporated into the model. The validity of the model has been confirmed with measurements.