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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。
Based on the experimental research on the 125 k V LTD module, a 150 k V LTD module with Blumlein structure is designed. Based on this, a LTD device with 800 k V output and six modules connected in series is designed. According to the result of theoretical calculation, the size of LTD secondary coil was selected. The influence of different input modes on the output pulse waveform was analyzed by circuit and 3D simulation. The results show that the left input is better than the right input, In terms of size, there is no significant difference between them. Compared with the unilateral input method, the bilateral symmetrical input method has a better leading edge of the load pulse waveform. Based on the design parameters of the 800 k V LTD device, the circuit simulation results show that the output pulse waveform has a leading edge of about 50 ns, a flat top of about 110 ns, and a trailing edge of about 30 ns with a magnitude of about 800 kV on a 60Ω matched load. The design structure to meet the insulation voltage requirements.