Power Supply For Silent Discharge Type Load

Ozone utilizing technologies, ultraviolet light and excimer laser applications are spreading very rapidly and have tends to enter daily life as small-size desinfection, ozonation devices etc. Since silent discharge in gas has been recognized as one of the most effective ways for ozone, ultraviolet and excimer laser generation, development of low cost and high effective driver for silent discharge load becomes the task of great importance.This paper presents a switched-mode power supply designed for such type of load. Introduced here voltage source type resonant inverter is operating under ZVS (zero voltage switching) principle and developed for driving a silent discharge (SD) type high-frequency ozone generation tube. Applied in this inverter PDM (Pulse Density Modulation) & PFM (Pulse Frequency Modulation) hybrid control strategy allows to achieve zero voltage switching in all power regulating ranges (10-100%) that reduces total switching losses and EMI noises and increases total system efficiency. Developed inverter type ozonizer system has superior performances, simple power regulating scheme and appears to be promising in industrial ozone generation applications, however the same principals can be applied in the domestic units with lower power which have tendency to be widely applied in the near future. Developed scheme has proved high performances for ozone generation system both by simulation and experiment and now it is under implementation for ultraviolet generating system.This paper introduces the design principals of such power supply along with its structure, regulation method and operating performances.