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固态化高功率长脉冲驱动源重频特性
Repetitive characteristics of solid state high power long pulse generator
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摘要: 基于固态化磁开关、低阻抗脉冲形成网络和感应电压叠加等关键技术，提出并研制了一台固态化高功率长脉冲驱动源。在前期通过2 GW 单次实验验证技术方案的基础上，研制了中等电压等级的重复频率初级电源；改进了两级磁脉冲压缩系统的复位和绝缘特性；优化了系统整体电路结构，利用感应电压叠加器完成充电磁开关和脉冲升压的双重功能；设计了合理的复位路径，实现了各部分磁芯的在线直流复位；并开展了重频运行研究。在电阻负载上获得了输出功率2.1 GW、脉宽约170 ns、重复频率20 Hz 及运行时间1 s 的实验结果，脉冲波形的重叠一致性好。Abstract: A solid state high power long pulse generator has been designed and constructed based on the key technologies of magnetic switch,low impedance pulse forming line,and inductive voltage adder,which was verified by single mode operation for peak power of 2 GW.For repetitive operation,a repetitive primary power supply of moderate voltage level was developed,the two stage magnetic pulse compressor was improved from aspects of reset and insulation,the pulsed charging was optimized where the inductive voltage adder was utilized for pulsed voltage step-up as well as for pulse charging and on-line direct current (DC)re-set was achieved by reasonable design of reset current path.At present,the experimental results achieved on a dummy load are output pulsed power of 2.1 GW,pulse width of 1 70 ns,repetitive rate of 20 Hz,operation time of 1 s and good for repeatability. For further improvement,the pseudospark switch would be replaced by serial connected thyristors to accomplish all solid-state de-sign.
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