中文摘要：

为了解决地球探测仪器等领域所需脉冲电压在几十至几kV之间输出电流相对较小的问题,提出了在中小功率场合采用IGBT代替空气放电球隙,从而改进充放电回路的控制方式。给出了以IGBT作为控制开关的Marx发生器的构成框图,IGBT驱动电路和AT89S52单片机控制电路;分析了以放电球隙作为控制开关的Marx发生器基本回路的动作过程;设计了一种以IGBT为控制开关的3级Marx发生器,并进行了放电等效电路的计算和元件参数的选择。采用单片机内部定时/计数器产生周期性脉冲信号,作为IGBT驱动电路的原始控制信号,最终实现了幅值1200 V,脉宽1-10 ms,脉冲频率为10-240/min可调的脉冲电压。采用示波器分压测试的方法给出了负载电阻输出脉冲电压的实际测试结果。测试结果表明,中小功率场合采用IGBT作为控制开关构建Marx发生器切实可行。

英文摘要：

This paper put forward an improved way of controlling charge and discharge circuit on medium-low power condition, with IGBT instead of spark gap. Meanwhile, a block diagram of Marx generator is provided, and a drive circuit for IGBT and control circuit centering around AT89S52 are devised . A three-stage Marx generator is well developed with IGBT as control switch. The periodic pulse signal from internal timer-counter of single chip microprocessor is taken as the original control signal of drive circuit for IGBT. Eventually, a contemplated pulse voltage with characteristics of amplitude 1200 V, width 1-10 ms, adjustable pulse rate of 10-240 per minute is realized. Test result for output impulse voltage across load resistor is presented by measuring shared voltage with oscilloscope, indicating that designing Marx generator with IGBT as control switch is feasible on medium-low power condition.