Research And Design Of High-Power Inverter For Ozone Generator

In recent years, ozone as a strong oxidant has been widely applied in the areas which relate with people's production and life closely, since it has an extremely strong oxidizing property and leaves no residues harmful to the global environment. Industrially, DBD is adopt to produce ozone. This paper is mainly concerned to research the power supply for ozone generator. Compared with the traditional power supply of directly step-up voltage, the high-frequency is high efficiency, small volume, low energy consumption, so it become the development trend of the ozone generator. The main work of the thesis includes the following four aspects:(1) Research and design on the main circuit. Through the analysis of capacitive load of the ozone generator, compensated resonant inductor is used to constitute resonant circuit. The series resonant circuit and the parallel resonant are discussed and compared in this thesis, then the series resonant circuit is selected as the main circuit of high power inverter for ozone generator.(2) Research and design on the control circuit. After analyzing of the three kinds of phase-shifted PWM control modes which include resistive, inductive and capacitive, the capacitive is suitable for the series resonant inverter that it can realize the ZCS of IGBT. Because the resonant frequency of the power supply is changed, it is necessary to design the frequency tracking circuit to realize ZCS as much as possible which can improve the efficiency.(3) Design and reality of the power supply. The procedure of the design which includes input rectifier filter circuit, full-bridge inverter circuit, transformer, frequency tracking circuit, control circuit, drive circuit, protection circuit and auxiliary power supply is introduced deeply in this paper.(4) Power simulation. The simulation analysis of the design of the power supply with Saber confirm its correctness and feasibility.