2008 Power supply unit for an electric discharge machine

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1、PowersupplyunitforanelectricdischargemachineWojciechMysińskiCracowUniversityofTechnology,FacultyofElectricalandComputerEngineering,Kraków,Poland,e-mail:mysinski@usk.pk.edu.plAbstract:TheelectricaldischargemachiningprocessServosystemprovidesoneofthebestsolutionsavailableformachiningaGapgrowingnumber

2、ofhigh-strengthandcorrosion–and-wearcontrollerresistantmaterials.ItoperatesontheprincipleoferosionofTool,metalsurfacesbyaninterruptedelectricspark.ThepowerIgapelectrodeControlledpulsesupplydesignandconfigurationrequirementsforDCgeneratorpowerproducingthedesiredsparkhavealwaysbeenachallengetoPowersu

3、pplyVgapsupplytheresearchers.ThispaperpresentsanexampleofaconfigurationofapowersupplyusedfortheEDMprocess.Thepowersupply(apulsepowergenerator)isbasedonandielectricmediumworkpiecePowersupplyelectroniccurrentsourceutilisingMOSFETtransistors.pulsecontrolunitThisarticledescribesbothsimulationtestscarri

4、edoutonthecircuit,andresultsoflaboratorytests.Fig.1.SchematiclayoutofbasicEDMcomponentsKeywords:Convertercircuit,currentsourceinverter(CSI),deviceapplication,powersupply,simulation.OneofthekeyelementsofanEDMisapowersupplyunitthatfeedspulsestotheelectrodeandthepartbeingworked.Todate,anumberofpowersu

5、pplyunitsolutionsIINTRODUCTIONhavebeendeveloped,rangingfromabasicresistance-Theelectricaldischargemachining(EDM)processiscapacitanceRCpowersupply,whichisstillusedtoday,oneofthebestsolutionsavailableformachiningatocomplexresonantpowersupplyunits[3].Dependinggrowingnumberofhigh-strengthandcorrosion–a

6、nd-onthesizeofanEDM,controlledpulsegeneratorpowerwearresistancematerials.Itisbasedontheprincipleofsupplyunitscanhavepowerrangingfromseveraldozenerosionofmetalsurfacesbyaninterruptedelectricspark.wattstoseveralkilowatts.ElectricdischargemachinesElectronicdischargemachininghasbecomeoneoftheutilisesol

7、utionsfeaturingasinglecontrolledpulsemosteffectivemethodsofmachininghardandbrittlegeneratorpowersupplyfeedingpulsesatoutputvoltagematerials.Forpropermachining,ahighmetalremovalof100Vto300V;therearealsoEDM’s