氣體火花開關(guān)論文：氣體火花開關(guān)脈沖功率氣體電離

1、【關(guān)鍵詞】氣體火花開關(guān)脈沖功率氣體電離【英文關(guān)鍵詞】gassparkswitchpulsedpowertechnologyGasionization氣體火花開關(guān)論文：用于EMP模擬器的氣體火花開關(guān)的優(yōu)化設(shè)計【中文摘要】開關(guān)是脈沖功率系統(tǒng)中的關(guān)鍵部件，研究設(shè)計的火花開關(guān)應用于電磁脈沖模擬器，開關(guān)為同軸式、電脈沖觸發(fā)結(jié)構(gòu)。主要內(nèi)容如下：1研究分析電脈沖方式觸發(fā)氣體火花開關(guān)性能的影響因素,基于電路理論和氣體放電理論，對火花開關(guān)進行數(shù)學建模，實現(xiàn)自洽和非自洽的仿真分析。2、基于仿真結(jié)果，優(yōu)化氣體火花開關(guān)的內(nèi)部結(jié)構(gòu)及相關(guān)參數(shù)，并研制出火花開關(guān)及相應的觸發(fā)控制電路。3、裝配調(diào)試火花開關(guān)，并進行系統(tǒng)的試驗分

2、析，包括靜態(tài)擊穿特性、觸發(fā)特性和開關(guān)導通性能試驗。得出的主要結(jié)果及結(jié)論如下：1、仿真模擬結(jié)果表明，陰極的尺寸結(jié)構(gòu)對脈沖的上升時間影響比較大，一定條件下,陰極尺寸越大，能接受的火花通道的光子輻射越多，越能縮短輸出脈沖的上升時間。2、在開關(guān)觸發(fā)范圍內(nèi)，觸發(fā)脈沖幅值增大能減小輸出脈沖的抖動，增大輸出脈沖的峰值電壓；觸發(fā)脈沖幅值偏小時，輸出脈沖峰尖會變平，脈沖上升時問也會延長。3、試驗結(jié)果發(fā)現(xiàn)，脈沖上升時間隨著導通電壓的增大而減小，但是在減小的過程中沒有表現(xiàn)出明顯的規(guī)律性。4、儲能電容的容量決定著脈沖的能量，在75Q負載情況下，儲能電容每變化100pF,輸出脈沖的下降時間也相應變化16ns,試驗得出的

3、結(jié)果與理論基本符合。設(shè)計的氣體火花開關(guān)，試驗測試值與理論模擬值基本吻合；觸發(fā)性能穩(wěn)定，觸發(fā)頻率可調(diào)；輸出脈沖上升時間可以短至2.2ns;輸出脈沖峰值可以達到40kV。【英文摘要】Switchiscorecomponentsinpulsedpowersystems.SparkSwitchisusedforelectromagneticpulsesimulator.Thisswitchdesignedasthecoaxialstructure.Thetriggermodeisthefielddistortiontrigger.Themaincontentsofthispaperarelisteda

4、sfollowing:1.Analysistheperformaneefactorsofthegassparkswitchwhichistriggeredbytheelectricalpulse.Establishamathematicalmodelingforthegassparkswitchtoachieveself-consistentandnon-self-consistentsimulationanalysis,whichisbasedoncircuittheoryandthegasdischargetheory.2.Optimizetheinternalstructureandre

5、latedparametersofthegassparkswitch.Designtheswitchandtriggercontrolcircuit.3.Assemblesofthesparkswitchandteststhewholesystem.Thetestincludingstaticbreakdowncharacteristic,triggerfeatureandswitchingconductionproperties.Themainexperimentconclusionobtainedincludes:1.Theresultofsimulationshowsthatthepul

6、serisetimeisaffectedbythesizeandstructureofthecathode.Ifwemakeabiggercathode,itwillgetmorephotonradiationofthesparkchannelandcanshortentheoutputpulserisetime2.Withintherangeofswitchtrigger,increasetheamplitudesofthetriggerpulsecanreducethejitteroftheoutputpulse,andtoincreasesthepeakvoltageoftheoutpu

7、tpulse.Iftheamplitudesofthetriggeristoosmall,theoutputpulserisetimewillbeextended.3.Pulserisetimedecreaseswiththeincreaseoftheturn-onvoltage,butintheprocessofreduceddidnotshowobviousregularity.Ithinkitiscausedbythatwhenrisetheturn-onvoltagethesparkchannelpositionhasbeenchanged.4.Capacityofenergyrese

8、rvecapacitaneedecidesenergyofpulse,whentheloadis75&thefall-timeofoutputpulsewillbedelayedabout16nswhenenergyreservecapacitaneeincreaseslOOp.Theresultsoftestisinlinewiththetheoreticalvalues.Theexperimentalvaluesofthisgassparkswitchareconsistentwiththetheoreticalvalues.Thetriggerfrequencecanbeadjusted,andstableperformanee.Theoutputpulserisetimeofthisswitchcanbe