摘要
为了给非平衡等离子体相关实验提供ns级高压脉冲,研制了一台基于传输线变压器(transmission linetransformer,TLT)原理的高压重频ns脉冲电源,通过在传输线外套加磁环增加二次阻抗,提高TLT的输出电压和能量传输效率。同时设计了一种电容-开关-传输线的紧凑化同轴结构。实验表明,在连接匹配负载条件下,电源输出脉冲电压峰值可以达到26kV,脉宽100ns,上升时间25ns,可在500Hz频率下稳定运行。同时成功地将其应用于大气压氩气等离子射流实验,发现与正弦电压相比,相同电压峰值下,脉冲电源作用下的等离子体射流长度更长,但2种电源作用下的射流长度均出现饱和现象,同时电源频率对射流长度无明显影响。
We developed a high voltage repetitive nanosecond pulsed power generator based on transmission line transformer {TLT） for non-thermal plasma generation. The properly designed magnetic cores placed around the coaxial cables of the TLT were chosen to obtain high secondary mode impedance to increase output voltage and energy transmission efficiency. A compact structure was designed for the high voltage capacitor, the spark gap switch and TLT. Experimental results show that voltage pulses of 26 kV with pulse duration of about 100 ns, pulse repetition rate of 500 Hz are achieved when the TLT is connected with matched load. The generator has been applied successfully in the plasma jet experiment. It is also found that, compared to the sinusoidal voltage, the length of plasma jet excited by pulse voltage is longer while applying the same peak voltage value, but saturation phenomena of the length of plasma jet appear while excited by two different power generators and the length of jet are hardly affected by the power frequency.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2012年第7期1770-1776,共7页
High Voltage Engineering
