从理论上分析了激磁电感对直线变压器驱动源输出脉冲波形顶降的影响, 使用Pspice软件对理论计算结果进行了模拟验证。理论计算和模拟分析的结果均表明：激磁电感越小, 输出脉冲波形的顶降越明显。设计了50 A的偏磁电路并进行了实验, 在重复频率为20 Hz时直线变压器驱动源工作稳定, 输出脉冲波形前沿约35 ns, 平顶约130 ns, 幅值约125 kV。与未加偏磁电路的实验结果相比, 顶降明显减小(小于5%), 实验结果与理论计算和模拟分析结果基本一致。

Based on the experimental device of the linear transformer driver, the effect of magnetizing inductance on the pulse waveform drop is theoretically and simulatively studied in this paper. The formulae are deduced, with which the effect of magnetizing inductance is calculated. In addition, the output pulse waveform is simulated through the Pspice software. The theoretical and simulated results agree well with each other, which show that the waveform drop is more obvious with the smaller magnetizing inductance. In order to reduce the waveform drop, we have designed an apparatus which can offer direct current of 50 A for bias magnetization, with which the LTD can steadily obtain output pulse with rise time of 35 ns, voltage of 125 kV, pulse duration of 130 ns and little waveform drop (less than 5%) at the frequency of 20 Hz．