800kV长脉冲驱动源的设计与模拟

Physical Design and Simulation of the Driver of Long Pulse with 800kV

基于对125 k V LTD模块的实验研究,设计了脉冲形成线为Blumlein结构的150 k V LTD模块,并在此基础上设计了输出电压800 k V、六级模块串联运行的LTD装置。根据理论计算的结果选择了LTD次级线圈的尺寸,通过电路和3D模拟,分析了不同输入方式对输出脉冲波形的影响,结果表明:左端输入方式好于右端输入方式,对于设计的LTD装置的尺寸来说,二者无明显差别;与单边输入方式相比,双边对称输入方式负载脉冲波形的前沿更好。根据800 k V LTD装置的设计参数进行了电路模拟,在60Ω匹配负载上得到的输出脉冲波形前沿约50 ns、平顶约110 ns、后沿约30 ns、幅值约800 k V,该装置的设计结构满足绝缘耐压要求。

A LTD module with 150 k V output capability was designed based on a former LTD module with 125 k V. The new block used Blumlein line as pulse forming line which has more merits than the former one. A 800 k V LTD system was contrived with the newly designed modules. Calculation and simulation were carried out to decide the structure of the LTD equipment which meets the requirement about insulation. The result of circuit simulation proved that the LTD system which can drive a 60Ω load with 800 k V, with a rise time about 50 ns, a fall time about 30 ns, and a hold time about 110 ns achieves the target of the project.