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2 个结果
  • 简介:Acomparativestudyoftheneedle-to-liquidplasmainthecontinuousmodewithDCandACexcitationsisdetailedinthispaper.Allplasmasstudiedhereareshowntobeglowdischarges.Thisstudyisbasedonmeasurementsofseveralkeyparameters,includingelectricalenergy,opticalemissionintensitiesofactivespecies,rotationalandvibrationaltemperatures,andtemperaturesoftheneedleandliquidelectrodes.ACplasmascanproduce1.2~5timeshigherexcitedstateactivespeciesthanDCplasmasunderthesamedissipatedpower.ACexcitedliquidplasmashavethehighestenergyutilizationefficiencyamongthethreesystems(ACexcitedplasmas,DCexcitedplasmaswithwateranodeandDCexcitedplasmaswithwatercathode);mostoftheenergyisusedtoproduceusefulspeciesratherthantoheattheelectrodesandplasmas.

  • 标签: 辉光放电等离子体 直流等离子体 激发态 交流 体接触 能量利用效率
  • 简介:Inthispaper,a3Dmagneto-hydrodynamic(MHD)arcsimulationmodelisappliedtoanalyzethearcmotionduringcurrentinterruptioninacertainaircircuitbreaker(ACB).Thedistributionsofpressure,temperature,gasflowandcurrentdensityofthearcplasmainthearcregionarecalculated,andthefactorsinfluencingthecommutationprocessareanalyzedaccordingtothecalculatedresults.Basedontheairflowinthearcchamber,thecausesofarccommutationasynchronyandthebackcommutationareinvestigated.Itindicatesthatareasonablecontactspacedesigniscrucialtoasuccessfularccommutationprocess.Toverifythesimulationresults,theinfluenceofcontactspaceonarcvoltageandarccommutationistested.ThisresearchcanprovidemethodsandreferencestotheoptimizationofACBdesign.

  • 标签: 空气断路器 空间设计 灭弧过程 电弧电压 换向过程 电流密度