A Double Short Pulse High-Voltage Power-Supply Based On DSP

Abstract

With the pollution becoming gradually severe, the quality of water deteriorates badly. So, traditional ways of wastewater treatment are being challenged. Recently many researchers paid attention to a way of wastewater treatment by high-voltage discharge in water. Single-pole short pulse and AC high-voltage power supply are most commonly used for generating this kind of discharge. But there are no reported research results of double short pulse high-voltage power supply. The chapter explains a design of a double short pulse high-voltage power supply system, which can output high-peak voltage, short voltage rise time, and high frequency. Mostly importantly, it can be applied on dielectric barrier discharge (DBD) wastewater treatment reactor to decrease energy consumption. The power supply system is composed of a positive and a negative DC high-voltage power supply and a rotating spark-gap switch (RSGS). The RSGS is used to control charge and discharge of pulse forming capacitances. The DC high-voltage power supply employs full-bridge inversion techniques and LCC resonant techniques to realize miniaturization. DSP is the controlling core of the whole power supply system, which regulates pulse amplitude and pulse frequency of power supply, based on the feedback information of interior parameter of the load. This power supply system is applied to discharge in water for dye wastewater treatment.