The Research On Medium Frequency Power Supply Of Dielectric Barrier Discharge Ozone Generation

Ozone technology, which is the important method of solving the problem of environment and water pollution, is one of the four key technologies in environment science in 21cn. So ozone generation and its power supply become the research focus.This paper is based on a R&D project of ozone generation system power supply. Having studied the existing DBD circuit analytical method, the paper, which take dielectric barrier discharge (DBD) ozone generation phase-shift PWM controlled load series resonant type full bridge Inverter as research object, indicate the deficiencies of existing research methods, and study the circuit again by using time-domain analytical method and fundamental wave analytical method. The paper also explores in the field of ozone generation power electronic circuits fault diagnoses. The main achievements obtained are:1.The working processes of the frequency-tracking phase-shift PWM controlled full bridge power supply load series resonant type DBD ozone generation power system are analyzed. The three existing analytical methods (summation modeling, time-domain and fundamental wave) are compared. And the deficiencies in three methods are studied and indicated.2. For making up for the deficiencies, based on wave time-domain analyzing, the paper study the four switching modes of circuit working processes again. And an improved time-domain analytical method is given. Based on that, the time conditions of the four switching modes conversion are studies, and a new DBD circuit mathematics dynamic model is given. At last, the validity of math model and the veracity of improved time-domain analytical method are verified by experiment and simulation.3. For making up for the deficiencies, the DBD circuit and its electric parameter performance are studied by using fundamental wave equivalent model. An improved fundamental wave analytical method is given. The validity and veracity of improved analytical method are verified by experiment and simulation.4. A power electronic circuits fault diagnosis method of ozone generation power supply based on two wavelet neural networks is presented. Two different three-layer wavelet neural networks are constructed for DBD ozone generating circuit fault, and the mathematical model and learning arithmetic are given. The relationship between...