简介:Adigitalarcweldingpowersupplywasdesignedwiththeadvancedreducedinstructionsetcomputermachine(ARM)andembeddedreal-timemulti-taskoperatingsystemmicroC/OS-Ⅱ.TheARM,withitspowerfulcalculatingspeedandcompleteperipheralequipments,isverysuitabletoworkasthecontrollerofthedigitalpowersupply.ThemicroC/OS-ⅡtransplantedinARM,helpstoimprovetherespondentspeedagainstvariousweldingsignals,aswellasthereliabilityofthecontrollingsoftware.Theweldingprocessconsistsofninetasks.Thetasksofgreatsignificanceonreliabilityofthewelder,forexample,theA/Dconversionofcurrentandvoltage,enjoytoppriority.Toavoidsimultaneous-sharingonA/DconverterandLCDmodule,twosemaphoresareintroducedintoensurethesmoothperformanceoftheweldingpowersupply.Provenbyexperiments,theARMandthemicroC/OS-Ⅱcangreatlyimproveboththerespondentspeedandthereliabilityofthedigitalwelder.
简介:Thedigitalizationofarcweldingpowersourcemainlydependsonthedigitalizationofarcweldinginverter,sothatmaincircuitandcontrollingsystemcangivefullplaytoadvantages.DigitalswitchingcontrolmakesmaincircuitdigitalandDSPand/orMCUmakescontrollingsystem,digital.SoIGBTdrivingcircuit,asatieofmaincircuitandcontrollingsystem,shouldalsobegotdigitalized.Thus,adigitaldrivingcircuitbasedonoptocouplerdeviceHCPL-316Jisprovided.Sometestingexperimentsweredone.Afterdrivingtesting,thedrivingcircuitcertificatesthatdrivingwaveformssatisfytherequirementsofarcweldingpowersourceandthedrivingcircuitisreasonablyandsimplydesigned.Andthedrivingcircuithashighcontrollingprecisionandreliability.No-load-voltagetestingandweldingexternalcharacteristictestingprovethatthedrivingcircuitcanbeappliedinarcweldingpowersource.
简介:ThispaperpresentsanintegratedsimulationmodelforfulldigitalcontrolledPMIG/MAGweldingsystemwithMatlab/Simulink,anditconsistsofpowerinverter,digitalcontrolsystemanddynamicarc-loadmodel.AnintegratedsimulationstudywasdoneforfulldigitalPMIG/MAGwelding,andamethodofconnectingdynamicarc-loadmodeltothesystemwithcontrolledcurrentsourcewaspresented,inaddition,thesimulationresultswereutilizedtostudytheissuesofdigitalcontrolPMIG/MAGweldinginthispaper.Theexperimentalresultsvalidatedthedevelopedsimulationmodel,andthissimulationstudycanbeappliedinimplementationofthefulldigitalPMIG/MAGweldingandanalysisofsystemdynamicprocess.
简介:Adigitalman-machineinteractionsystemcontrolledbycommunicationsbetweentwoprocessorsofTMS320F240andAT98C2051wasresearchedinthepaper.Thesystemiseasytosetandmodifyweldingprocessparametersbykeyboards,anddisplayinformationofweldingsitebyLCD(LiquidCrystalDisplay).Asonepartofmulti-tasksystemaboutTIGweldingmachine,thecoordinationofman-machineinteractionsystemwithothertasksisthemainpointtothestabilityandreliabilityofitsoperation.Experimentsresultindicatesthatthesystemisstable,operation-flexible,highprecision,andanti-interfering.
简介:Adigitalcontrolofpulsedgasmetalarcweldinginverterwasproposed.AcontrolsystemconsistingofanaloguepartswasreplacedwithanewdigitalcontrolimplementedinaTMS320LF2407ADSPchip.Thedesignandconstructionalfeaturesofthewholedigitalcontrolwerepresented.TheresourcesoftheDSPchipwereefficientlyutilizedandthecircuitsareveryconcise,whichcanenhancethestabilityandreliabilityofweldinginverter.Experimentalresultsdemonstratethatthedevelopeddigitalcontrolhastheabilitytoaccomplishtheexcellentpulsedgasmetalarcweldingprocessandthemeritsofthedevelopeddigitalcontrolarestableweldingprocess,littlespatterandperfectweldappearance.