高频高压交流电源应用于介质阻挡放电特性的研究

Application of High Voltage and High Frequency AC Power in the Experimental Research of the Discharge Characteristics of Coaxial DBD Device

应用电压幅值和频率都可调的高频高压交流电源研究了大气压空气中同轴介质阻挡放电的特性;介绍了该介质阻挡放电装置的工作原理后研究了电源逆变器交流侧电路工作于固有谐振频率和1/3固有谐振频率下负载电压及其频率、放电电流、谐振电流随着逆变器直流侧电压变化的规律,比较了在逆变器直流侧电压相同下的负载电压和放电电流的特点。研究结果表明,在初始放电发生前,电源的逆变电路直流侧电压线性增加,负载电压和放电电流随之增加,负载性质始终为容性;放电发生后,负载电压近似恒定,放电电流近似线性增长,负载性质为阻容性;在外加电源电压的正、负半周内,微放电电流波形不对称,分别呈“似辉光放电”和“丝状放电”的特点。

A high voltage and high frequency AC power source, which can output high voltage with adjusted waveforms, adjusted magnitude and adjusted frequency, is used to study the characteristics of DBD （Dielectric barrier discharge） in atmospheric air. Operating principle of the DBD device is introduced. When the switching frequency is equal to resonant frequency and is one third of the resonant frequency, the charging principles of load voltage, discharge current, resonant current and frequency of load voltage Versus the change of DC voltage of the converter, is studied. Experimental results show that, before the initial discharge, load voltage and discharge current are linear with the increase of the DC voltage of the power supply＇s converter, and the reactor is capacitive; after the initial discharge, the reactor is resistive and capacitive, load voltage keeps nearly constant, discharge current keeps increasing linearly; in the positive and negative half period of the applied voltage, waveforms of the microdlscharge current is not symmetrical, one appears to be pseudo glow discharge, another appears to be filamentary discharge.