Novel Power Supply Equipment Used for High-Pressure Metal Halide Discharge Lamp
Wang Ruwen,Yao Xiaoli,Yao Jianjun
(School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

Abstract: A new circuit topology of power supply for high-pressure metal halide discharge lamp is proposed. Without a high voltage pulse generator for firing the lamp, the supply can apply voltage in three different modes for the lamp operation from firing to steady state through modulation of the switch operation frequency. The supply circuit scheme is simplified and its volume can be also reduced. The switches in propsed supply can operate in lower current amplitude, nearly current source and ZCS mode. The principle of the supply and its scheme were described. Some simulation and experiment results for modeling load were given as well.
Keywords: resonant inverter;current source;zero-current commutation