Experimental investigation of 300 kA fast linear transformer driver stage
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摘要: 介绍了14支路并联的300 kA百ns直线型变压器驱动源单级模块的结构和关键部件。模块通过采用双端引出电极电容器以及小型多间隙串联气体火花开关，可以并联更多的支路数，减小回路电感，提高储能密度；通过采用非晶磁芯，减小磁芯损耗，提高模块耦合效率。实验研究了初级气体开关工作系数对模块输出的影响，实验结果表明：模块开关电压工作系数达到0.7，多间隙串联开关才能较好同步放电；给出了快直线型变压器模块的初步调试实验结果，在模块充电90 kV，开关气压0.32 MPa情况下，匹配负载电流峰值可达到302 kA，上升时间约100 ns，负载上获得的峰值功率为23 GW。Abstract: Modular linear transformer driver(LTD) is a novel fast discharge high pulsed power source basedon primary storage energy. It can realize the connection of multiple LTD modules in series or parallel conveniently， and can directly acquire 100 to 200 ns high power pulses. This paper introduces an LTD stage with the rise time of 100 ns and the current of 300 kA. The stage of LTD consists of 14 bricks in parallel. The 200 kV multi-gap multi-channel gas spark switch with the diameter of 98 mm and the height of 127 mm has been developed. The influence on the load output current of the switch working voltage ratio was investigated. The result indicates that the 14 bricks can discharge synchronously， when the switch working voltage ratio is 0.7.When the charging voltage of the stage is 90 kV and the switch gas pressure is 0.32 MPa， the output current is about 302 kA， the risetime is about 100 ns (10% to 90%)， and the power is about 23 GW on a matched load.
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