Field distortion gas switch is one of the crucial elements in a Marx generator, fast linear transformer driver and other pulsed power installations. The performance of the gas switch, which is dramatically affected by...Field distortion gas switch is one of the crucial elements in a Marx generator, fast linear transformer driver and other pulsed power installations. The performance of the gas switch, which is dramatically affected by the surface roughness due to electrode erosion during the discharge process, directly influences the output parameters, stability and reliability of the pulsed power system. In this paper, an electrode surface roughness （ESR） calculation model has been established based on a great deal of experimental data under operating current. The discharge current waveform, the peak height of the burr, the radius and the depth of etch pits in the electrode erosion region were used to predict the ESR. Also, experimental results indicate that this calculation model can effectively estimate the ESR of the test gas switch.展开更多
针对脉冲电流法破碎核燃料球的研究需要,设计了基于Marx电路的高压直流脉冲电源。采用三电极场畸变开关作为触发开关,开关主电极和圆盘形触发极同轴布置,采用N2气体绝缘,仿真计算结果表明开关在充电和触发时电场最大值区域均匀,有机玻...针对脉冲电流法破碎核燃料球的研究需要,设计了基于Marx电路的高压直流脉冲电源。采用三电极场畸变开关作为触发开关,开关主电极和圆盘形触发极同轴布置,采用N2气体绝缘,仿真计算结果表明开关在充电和触发时电场最大值区域均匀,有机玻璃罩沿面场强符合绝缘要求。采用7级Marx发生器电路结构,每级由5 kΩ充电电阻,0.14"F高压脉冲电容和一个气体开关构成,触发源采用氢闸流管触发电路。进行了开关自击穿和Marx电路的触发实验,表明开关电感小,场畸变系数大,触发性能可靠。将该高压脉冲电源用于解体目标物质,可获得输出上升时间500 ns、电流峰值9.12 k A、单个脉冲持续时间3.5μs的高压脉冲,符合预期的设计指标。展开更多
基金supported by National Natural Science Foundation of China(Nos.50637010,51207127)
文摘Field distortion gas switch is one of the crucial elements in a Marx generator, fast linear transformer driver and other pulsed power installations. The performance of the gas switch, which is dramatically affected by the surface roughness due to electrode erosion during the discharge process, directly influences the output parameters, stability and reliability of the pulsed power system. In this paper, an electrode surface roughness （ESR） calculation model has been established based on a great deal of experimental data under operating current. The discharge current waveform, the peak height of the burr, the radius and the depth of etch pits in the electrode erosion region were used to predict the ESR. Also, experimental results indicate that this calculation model can effectively estimate the ESR of the test gas switch.
文摘针对脉冲电流法破碎核燃料球的研究需要,设计了基于Marx电路的高压直流脉冲电源。采用三电极场畸变开关作为触发开关,开关主电极和圆盘形触发极同轴布置,采用N2气体绝缘,仿真计算结果表明开关在充电和触发时电场最大值区域均匀,有机玻璃罩沿面场强符合绝缘要求。采用7级Marx发生器电路结构,每级由5 kΩ充电电阻,0.14"F高压脉冲电容和一个气体开关构成,触发源采用氢闸流管触发电路。进行了开关自击穿和Marx电路的触发实验,表明开关电感小,场畸变系数大,触发性能可靠。将该高压脉冲电源用于解体目标物质,可获得输出上升时间500 ns、电流峰值9.12 k A、单个脉冲持续时间3.5μs的高压脉冲,符合预期的设计指标。
