串联谐振模式下介质阻挡放电动态负载及工作特性研究

Dynamic Loads and Working Characteristics of DBD in Series Resonance Mode

分析了采用串联谐振中频逆变高压电源供电的介质阻挡放电装置的工作原理及其负载输入电压的频率特性,并对其动态负载及工作特性进行了试验研究。结果表明:负载的介质等效电容随着放电功率的增加而增大,气隙等效电容则随放电功率的增加而减小,气隙及介质等效电容的串联值随放电功率的变化较小;上述系统在负载气隙击穿前后存在两个不同的谐振频率,系统工作在气隙击穿前的谐振频率放电最易启动,而电源频率接近气隙击穿后的回路谐振频率时有利于系统放电功率的提高,为介质阻挡放电型低温等离子体反应器的设计及改进提供了理论及试验依据。

For the dielectric barrier discharge device whose power was supplied with the series resonance medium-frequency inverter, the working principle and load voltage frequency were analyzed and the dynamic load and working characteristic were researched. The results show that, with the increase of discharge power, the dielectric equivalent capacitance increases and the gap equivalent capacitance decreases, but the series capacitance of them has little difference. The above-mentioned device has two different resonance frequencies, which are distributed before and after the breakdown of gap. When the device works at the former resonance frequency, the discharge starts easily. When the device works at the latter resonance frequency, the system discharge power easily increases. The conclusions provide the theoretical and experimental evidence for designing the DBD- typed non-thermal plasma reactor.