Study On The Conductive Characteristics Of Dielectric Barrier Discharge Plasma

Dielectric Barrier Discharge (Dielectric Barrier Discharge, DBD), inserted in the dielectric between two electrodes, is a form of gas discharge.when the gas discharge gap voltage is high enough and Discharge channels are produced. Meanwhile, DBD forms. The dielectric barrier discharge (DBD), because of its unique nature has been paid much attention to in recent years due to its widely applications in Ozone synthesis, surface modification, environmental engineering, medical sterilization and so on.In order to meet the industrialization process of DBD technology, DBD power trend is better stability, more efficient, he higher DBD power, higher operating frequency. So, the conductive properties of DBD plasma can provide effective parameters to DBD power design and implement electrical impedance. At the same time, the research can enrich the theory of DBD discharge. Based on the theoretical study of low-frequency equivalent model, the conductive properties of DBD plasma has been investigated by Q-V Lissajous graph method. The effects of applied voltage V (0 to 9kv) and frequency f (20 kHz to 30 kHz Quasi-high-frequency) on discharge current, discharge power and equivalent capacitance were studied. The reasons that affect on the electrical parameters were investigated from the perspective of electricity. The Quasi-high-frequency equivalent circuit model was established and Matlab/Simulink simulation was carried out. The simulation results and experimental results were compared. The results show that improving V and f can effectively enhance current intensity and DBD power P. when DBD Closes to the fully discharged state, I and P increase slowly until it reaches a constant value. With V and f increasing, the total equivalent capacitance C Slight change and dielectric equivalent capacitance Cd increases quickly. Simultaneously, equivalent capacitance of the discharge gap Cg correspondingly decreases rapidly. Until the discharge stabilization, Cd and Cg respectively come to stability value. The simulation results of Quasi-high-frequency equivalent circuit model and experimental results achieve good agreement.