基于DSRD的高重频固态脉冲源的研制

Development of the high repetitive frequency solidstate pulse generator based on DSRD

介绍了一种基于新型高功率超高速半导体断路开关—漂移阶跃恢复二极管(DSRD)和可饱和脉冲变压器的高电压高重频超高速全固态脉冲源。设计了脉冲源的电路拓扑结构,理论上分析了脉冲源电路的工作原理,研究获得了可饱和脉冲变压器匝数、磁芯截面积及负载阻抗等参数对脉冲源输出特性的影响的规律。实验结果表明:脉冲源在50 kΩ阻性负载条件下,输出脉冲峰值电压约38.2 kV,脉冲前沿约7.1 ns,脉冲宽度约14.1 ns,输出峰值功率约29.2 kW,可在400 kHz重复频率下稳定工作。

This paper presents a solid-state pulse generator based on drift step recovery diode(DSRD)-a new high-power,ultra-fast semiconductor opening switch,and a saturable pulse transformer.The topology structure of circuit is designed,the operating principle of the pulse generator is analyzed theoretically.And the influence of several key circuit parameters on the output waveform of the pulse generator is studied,including the coil winding turns,the magnetic core layers,the load resistance,and the trigger pulse width.The experimental results show that the pulse generator can produce a pulse at a 50 kΩ-resistive load with amplitude 38.2 kV,rise time 7.1 ns,pulse width 14.1 ns,output peak power 29.2 kW,and it could work stably at the repetition frequency of 400 kHz.