伪火花放电开关电压跌落过程实验研究
Ｉnvestigation on voltage collapse characteristics of the pseudospark switch
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摘要: 设计了典型参数下的伪火花放电开关，进行了空气介质下的电压特性实验，给出了伪火花开关放电电压与气压变化的关系曲线；测量了产生伪火花放电的气压范围（1~29Pa）和单间隙伪火花放电开关耐受电压的最大值(40kV)，测得了伪火花放电与辉光放电的转折点气压(29Pa)，并对实验结果进行了理论分析。研究了伪火花放电开关电压跌落时间与放电电压的关系，首次将开关电压跌落过程分为暂态阶段和稳态阶段，讨论了放电电路参数，气体压力，开关结构和放电电压对电压跌落时间的影响。实验表明，在气压和开关结构不变的条件下，暂态过程时间由放电电压决定，电压越高，则所需时间就越短；稳态过程时间由放电电路参数决定，不受放电电压影响。Abstract: The pseudospark switch is a new type of closing switch used in pulsed power technology. In this paper, a prototype pseudospark switch is designed. Detailed experiments of voltage characteristics in air have been carried out with the discharge curve being measured. The critical pressure（29Pa）distinguishing pseudospark discharge from glow discharge is determined. Voltage collapse time is measured, transit stage and stable stage of voltage collapse are defined in the first time, experiment data showed, in the same pressure, the transit time is determined by switch voltage, and the stable time is determined by the parameters of the discharge circuit.
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Key words:
- pseudospark switch(pss) /
- pulsed power technology /
- hold-off voltage /
- voltage collapse
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