新型小体积伪火花开关研制

Development of miniature pseudo-spark switch

伪火花开关是脉冲功率领域关键器件之一,具有脉冲电流大、电压范围宽、寿命长及可靠性高等优点。针对整机系统小型化发展的需要,开展新型小体积伪火花开关研制,创新性地将触发针引入空心阴极内部,实现辉光放电电子源注入,该设计减小伪火花开关的体积,并通过制管及实验验证设计合理性。测试结果表明,该产品的阳极工作电压范围为0.5~10 kV,最大阳极脉冲电流40 kA;在36 kA脉冲电流情况下,工作2万余次并未发现性能下降;该样品已通过高温、低温、温循、振动等可靠性试验考核。

Pseudo-spark switch,with the advantages of large pulse current,wide operating voltage,long life expectancy and high reliability,is one of the key devices in the field of pulse power technology.To meet the miniaturized development requirement in the complete machine,the miniature pseudo-spark switch has been developed.The electron source is injected by introducing the trigger needle into the hollow cathode innovatively in order to achieve glow discharge.Through this physical design the volume of the pseudo-spark switch has been decreased as well as the design rationality has been verified by producing and testing the pseudo-spark switch.The test results indicate that the anode working voltage is ranged from 500 V to 10 kV and the anode pulse current is 40 kA.Under the condition that the anode pulse current is 36 kA,no sign of performance decline has been found after more than 20000 times of work.The sample has passed the reliability test of high temperature,low temperature,temperature cycle and vibration.