High Voltage Pulse Power Supply And The Application In Dielectric Barrier Discharge

In recent decades,with the development of science and technology,plasma is gradually used in different fields.Atmospheric low-temperature plasma can be generated in open space,so it has been widely studied by scholars at home and abroad.As one of the driving sources for generating atmospheric low temperature plasma,the pulse power supply is widely concerned because its rapid rising edge can quickly ionize the gas in the air gap.However,at present,there is relatively little research on pulse parameters on plasma discharge characteristics at home and abroad,so it is extremely important to develop a high-voltage pulse power supply with high repetition frequency,fast rising edge and compact structure.The main content of this article is to design a high-voltage pulse power supply for dielectric barrier discharge.The specific research contents are as follows:First of all,the main body of the power supply adopts a modular design.The advantage of this design is that multiple low-voltage modules are connected in series to increase the output pulse voltage level,and the conduction quantity and time of the control module can adjust the output pulse amplitude and pulse width.Another advantage of the modular design is that due to the low voltage level of each module,it is easy to select the device and also to facilitate the later maintenance processing.Secondly,because each module is equivalent to a first-level Marx circuit,the working principle of traditional Marx and all-solid Marx circuits is analyzed,and the impact of different parameters on the output pulse is analyzed using simulation software.Each module contains a capacitor voltage multiplying unit.Through its working modal analysis,the mathematical expression of its output voltage is derived,and the output voltage waveform under other parameters is simulated and analyzed.Thirdly,analyze the factors that affect the edge of the output pulse of the Marx circuit,and use the magnetic switch to steepen the pulse.Through mathematical analysis of the first-level magnetic switch pulse steepening circuit,the mathematical expressions of load pre-pulse voltage and magnetic switch parameters are obtained.Then software simulation analyzes the influence of magnetic switch performance parameters on pulse steepening effect.Finally,the design of the high-voltage power supply unit module and magnetic switch is completed.The two different modes of dielectric barrier discharge are analyzed,and the two physical models are introduced separately.The one-dimensional fluid model is used to analyze the characteristics of dielectric barrier discharge under different parameters using software simulation.