Analysis, design and experimentation of a high voltage power supply for ozone generation based on the current-fed parallel-resonant push-pull inverter

摘要

The use of supply frequencies above 50-60 Hz allow to increase the power density applied to the ozonizer electrode surface and increase ozone production for a given surface area, while decreasing the necessary peak voltage. Parallel resonant converters are well suited for supplying the high capacitive load of ozonizers. Therefore, in This work the current-fed parallel-resonant push-pull inverter is proposed as a good option to implement high-voltage high-frequency power supplies for ozone generators. The proposed converter is analyzed and some important characteristics are obtained. The design and implementation of the complete power supply are also shown. The UC3872 integrated circuit is proposed in order to operate the converter at resonance, allowing to maintain a good response disregarding the changes in electric parameters of transformer-ozonizer pair. Experimental results for a 50 W prototype are also provided.