A Capacitor Charging Power Supply using Series Resonant Topology

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1、ACapacitorChargingPowerSupplyusingSeriesResonantTopologyY.Kelkar,Y.Raikwar,A.C.ThakurtaPowerSupplyDivision,CentreforAdvancedTechnology,P.O.CAT,Indore-452013Email:kelkar@rrcat.gov.inAbstractacceleratorprogramme.ThecompleteprocessisdividedAcapacitorchargingpowersupplyhastoperformintothreemode

2、s:(1)HighPowerchargingmode(2)Lowunderwiderangeofloadvariations.InitiallythecapacitorPowerRefreshmode(3)OutputPulsedeliverymode[3].willactasashortcircuitsothetopologymustbesuchDuringHighPowerchargingmodetheloadcapacitoristhatitshouldwithstandshortcircuitconditionchargedbyconstantcurrentcharg

3、ing,producinglinearrepetitively.Thispowersupplyhasbeenspeciallyvoltageacrosscapacitor.Theloadvoltageissensedanddevelopedusingseriesresonanttopologyforcapacitorcomparedwithreferencevoltagetogeneratechargechargingapplications.Thecapacitorchargingpowersignal.Astheloadcapacitorischargedtorequis

4、itesupply(CCPS)willchargea100uFenergystoragevoltagethechargerentersintoLowPowerRefreshmodecapacitorfrom0Vto600Vin35msexhibitingacharginguntilthetriggerisappliedtogenerateoutputpulsepowerof514.28J/satarepetitionrateof25Hz.dischargingloadcapacitor.DuringfirsttwomodesTopologyselectionisbasedon

5、thefactthattheseriesdischargingcircuitisdisabled.Thepaperdescribestheresonantconverterwithswitchingfrequencybelow50%prototypecapacitorchargingpowersupplythathasbeenoftheresonantfrequency(fs≤0.5fr)actasacurrentdesigned,assembledandtesteduptofullpower.source.OPERATIONTheinverterutilizesafullb

6、ridgetopologywithfixedINTRODUCTIONontimeandfixedfrequencyoperation(fs<0.5fr)asTheCCPSadoptsseriesresonantconvertertopologyshownincircuitdiagramFigure1.Withthisapproachaoperatingatfs<0.5frcorrespondstodiscontinuousloadfixedquantumofenergywillbetransferredtoloadincurrent.Thistopologyischosena

7、sitisinherentlyshorteverycycle.TheDCbusisobtainedbyrectifyingandcircuitproof,actsasacurrentsourceandthecurrentfilteringsinglephaseACmains.Thebridgeconsistofwaveformispredictablefromstabilitypointofview.TheIXYSmakeIGBTsIXGH15N120BratedforVCESequalinverter