基于快Marx发生器的紧凑型重频脉冲驱动源

Compact Repetitive Pulsed Power System Based on Fast Marx Generator

为了实现重频脉冲功率源小型化,研制了基于快Marx发生器的紧凑型重频低阻抗脉冲驱动源。采用低功率电源(比如30 V电池)作为初始能源,重频高压充电电源集成大容量超级电容,可脱离外部电源重频对Marx发生器充电至100 k V,结合对高压充电电源和脉冲触发源的同步控制,实现Marx发生器的重频高功率多脉冲输出;Marx发生器中采用薄膜脉冲电容器、小型化气体开关、电感隔离以及SF6气体绝缘等设计,最高建立电压800 k V、额定储能1.6 k J;高压充电电源和脉冲触发源采用真空灌封绝缘胶等紧凑设计,全系统集成后外形尺寸约0.9 m×0.45 m×0.45 m。在实验中获得了重复频率10 Hz、脉宽150 ns、峰值电压>400 k V、电流>21 k A的连续多脉冲输出,为研制更高性能的小型化重频脉冲驱动源奠定了基础。

A compact repetitive pulsed power system on the basis of fast Marx generator was developed in order to drive pulsed power devices to be miniaturized. It is mainly composed of a high-voltage power supply, a fast Marx generator and a trigger pulse generator. The high-voltage power supply is powered by low power electrical source, such as 30 V batteries. It is integrated with a super capacitors group for fast repetitive output with big power and high voltage （100 kV）. There are polypropylene film capacitors with plastic shell, miniaturized gas switches, isolated inductors between capacitors and SF6 gas insulation in the 8-stage fast Marx generator which possesses the maximal output voltage of 800 kV and st0rage energy of 1.6 kJ. A 5-stages Marx generator structure is utilized in trigger pulse generator with the maximal output voltage of 50 kV and pulse duration of about 500 ns. Both of the high-voltage power supply and trigger pulse generator make use of coagulated silicon colloid as in-house insulating medium. Therefore, they can have compact structures. The whole integrated pulsed power system has a volume of 0.9 m×0.45 m×0.45 m. In experiments, successive 5 pulses were gained on CuSO4 liquid resistor load with repetitive rate of 10 Hz, peak voltage of more than 400 kV, peak current of more than 21 kA, and pulse duration of about 150 ns. This work could provide experiences for building higher power pulsed poWer system with a small volume.