不同驱动电流和电极尺寸下的等离子体断路开关性能

Performance of plasma opening switch with different driven-current and geometric scale of electrodes

开展了驱动电流为45,75和105 kA以及阴极直径分别为20 mm和40 mm下的等离子体断路开关性能实验研究。结果表明:随着发生器驱动电流增加,负载电流上升时间逐渐减小,最高电压倍增系数逐渐增加。与阴极直径为20 mm的等离子体开关相比,阴极直径为40 mm的等离子体开关导通时间和负载电流上升时间增加,开关电压和电流转换效率降低。实验获得的最高电压倍增系数和电流转换效率分别为4.9和97%,负载电流上升时间小于100 ns。

The plasma opening switch （POS） performance was investigated with different driven current and different POS cathode diameters Ф20 mm and Ф40 mm）. The results show that the rise time of the load current decreases and the voltage multiplication factor of POS increases when the driven current increases. In the case of larger cathode diameter,lengthened conduction time and longer rise time of load current are obtained, meanwhile the POS voltage and current transfer efficiency decrease. The maximal voltage multiplication factor and current transfer efficiency obtained in experiments are about 4.9 and 97%, respectively. The rise time of load current is less than 100 ns.