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1、ParametersDesignofMainCircuitofACConstantVoltagePowerSupplyBasedonDualDirectionalReversiblePWMControlAbstract:TheconstantvoltagepowersupplywithdualdirectionalreversiblePWMcompensationhasmeritsofhighprecision,highefficiency,smallvolume,andsoon.Toensurethequalityofsupply,itisimportanttofixthevalueo
2、finductance,capacitanceinmaincircuit.Fromtheangleoffiltering,andthroughanalysisofthecircuitworking,detailedformulasoftheinductanceandcapacitancecalculationaregivenandanexampleofitisgiventoo.Inparameterscalculation,toreducethevolume,thefilterinductanceistakenasmallervaluebutthecapacitanceistakenag
3、reatervalue;theDCsmoothingcapacitanceshouldbechosenaccordingtotheamplitudelimitofDCvoltagerisingininversion,andshouldbetakenasgreataspossibletomaintainvoltagestabilizingprecision.Keywords:constantvoltage;compensation;PWMrectifier;SPWMinverter;filterⅠ.INTRODUCTIONFig.1Struetuediagramofregulatepowe
4、rsupplyTherearemanykindsofACconstantvoltagepowersupply,ofwhichtypesofparameteradjustment,self-coupledadjustment,full-powertransforming[1]havefollowingcharacters:largevolumeofelectromagneticcomponents,greatharmonicsofvoltageandcurrent,lowpowerfactor,soithassometechnicaladvantagesinsupplycompensati
5、ingwithinsmallcapacity.Theconstantvoltagepowersupplywithcompensationadoptsthecompensationpartbeingincreasedtorealizethestabilityofoutputvoltage,ithasfollowingcharacters:simpleincircuit,smallincapacity,highinprecision,quickinresponsespeed.InconstantvoltagepowersupplybasedondualPWMcotrol,thecompens
6、ationpowercanflowindualdirection,isgoodincomprehensiveperformances.Withthedevelopmentofmicro-computer,speedfasterandfaster,costlowerandlower,thedualdirectionalreversiblePWMconstantvoltagepowersupplycontroledbyMCUisbecomingthemainstreaminACconstantvoltagepowersupplydesign.Ⅱ.MAINCIRCUITDESIGNStruct
7、ureoftheconstantvoltagepowersupplywithcompensationofdualdirectionalreversiblePWMisshowninFig.1,ModeofPWMcontrolisadoptedinrectifierandinverter.ByusingPWMrectifier,powerfactorofACsidecanreachto1;low-orderharmonicpolluti
