壁电荷对介质阻挡放电特性的影响  

Influence of Accumulated Charges on Characteristic of Dielectric Barrier Discharge

作　　者：丁伟[1] 何立明[1] 兰宇丹[1] 

机构地区：[1]空军工程大学工程学院,西安710038

出　　处：《高电压技术》2010年第2期456-460,共5页High Voltage Engineering

基　　金：国家自然科学基金(50776100)~~

摘　　要：为了研究壁电荷对介质阻挡放电特性的影响,实验测量了不同驱动电压幅值、气体间隙距离和介质板厚度下的介质阻挡放电的电压-电流特性,并运用气体放电理论和简化的理论模型对实验结果和介质阻挡放电的发展过程进行了分析。结果表明,由于壁电荷的作用使得DBD放电发生的时刻在驱动电压正负半周期不对称,相邻两次放电间隔长短交替;随着驱动电压幅值的增加,介质板厚度或气体间隙距离的减小,DBD微放电增多,传输电荷量增多,介质表面累积电荷量增多,壁电荷对介质阻挡放电的影响增大;当壁电荷足够多时,甚至会出现反向放电。To study the influence of accumulated charges on characteristics of dielectric barrier discharge,voltage-current characteristics of the dielectric barrier discharges for different applied voltages,air gap distances and thickness of the dielectric were measured,and the experimental results and the dielectric barrier discharges developing process were theoretically analyzed based on the theory of gas discharges and a simple theory model.The results show that the time of starting discharge on positive and negative half cycle is asymmetry and the intervals of adjacent two discharges are alternated.And the number of micro-discharges,the charges transported in discharges and the charges accumulated on dielectric layers increase with amplitude of applied voltages increasing and thickness of dielectric layers or air gap distances decreasing,so the effect of accumulated charges is enhanced.And if the accumulated charges are enough,reverse discharges are even possible.

关 键 词：介质阻挡放电 传输电荷 壁电荷 微放电 击穿场强 熄灭场强 

分 类 号：O461[理学—电子物理学] TM213[理学—物理]