轴向磁场控制的旋转电弧开关的研制

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1、华中科技大学硕士学位论文轴向磁场控制的旋转电弧开关的研制姓名：王清玲申请学位级别：硕士专业：高电压与绝缘技术指导教师：潘垣;何孟兵20060323对开关进行了基本特性试验，发现开关自击穿电压有些分散，平均自击穿电压为30kV左右，主要原因是机械安装工艺，开关能够耐受25kV的直流电压。对开关进行大电流试验的回路进行了方案设计和参数设计，并进行了电流波形仿真模拟。开关共进行了7次大电流试验，发现开关电极烧蚀非常轻微，有明显的电弧旋转痕迹，工作电压15kV，电流峰值200kA，脉宽420～470us，电荷转移量50C。开关能够满足神光III对开关的前期要求。开关更高

2、工作性能(工作电压23kV，电流峰值300kA，脉宽500us，电荷转移量100C)、工作可靠性和寿命等其它性能、触发系统的陡化以及磁开关隔离系统还有待后续研究。关键词：脉冲功率电荷转移量电极烧蚀轴向磁场控制的旋转电弧开关电极优化Marx型触发系统大电流试验IIAbstractPulsedpowertechnologyhasbeenusedextensivelyinthefieldsofscientificexperiments,nationaldefense,biomedicineandenvironmentalprotectionetc.Asoneofthe

3、crucialcomponents,ahigh-energyswitchwithhighvoltage,highcurrent,largecharge-transfers,slightelectrodeserosions,longlife-timeandhighlyreliabilityisgreatlyexpectedtomeettherapiddevelopmentofpulsedpowersystem,especiallythemainamplifierpowerconditioningforthelaserfusion.Inthisthesisthero

4、taryarcgap-switchinaxialmagneticfieldisfullyexplored.Thisthesisinitiateswiththereviewofdifferenttypesofhighpowerpulseclosingswitchesincludingtheoperatingprinciples,characteristicsandparameters.Especiallytherecentdevelopmentofthehighcoulombandcurrentclosingswitchinvariouscountriesincl

5、udingtherequirementsofseveralpowerconditioningsystems,kindsofswitches,operatingprinciples,recentspecifications,advantagesanddisadvantagesareintroducedhere.ARotaryArcGap-switchinaxialmagneticfieldisdevelopedanditsoperatingprinciple,themovemechanismofthearcinaxialmagneticfieldandtheero

6、sionmechanismoftheelectrodesareintroduced.Theperformanceoftheswitchcanbeimprovedby:(1)selectsomematerialwhichisdifficulttobemeltedanderodedtobetheelectrodesmaterial;(2)coilstobringaxialmagneticfieldareappendedtotheswitchtomakethearcmovecontinuouslyalongtheelectrodeswhichresultinthear

7、cheatanderosionaredispersedtoalargearea;(3)coaxialcolumnsconfigurationmakestheinter-actionareaofthearcandelectrodesincreasedandthecurrentdensityisgreatlyreduced;(4)optimizetheelectrodesconfigurationtomaketheelectricfieldasuniformaspossible,asaresult,thedischargedispersibilityisgreata

8、ndtheelectro