移相全橋ZVS DC-DC變換器及其并聯(lián)均流技術研究.pdf

1、華中科技大學碩士學位論文移相全橋ZVSDCDC變換器及其并聯(lián)均流技術研究姓名：張長進申請學位級別：碩士專業(yè)：電力電子與電力傳動指導教師：戴珂20070608華中科技大學碩士學位論文華中科技大學碩士學位論文IIAbstractThisthesisfocusesontheresearchofphaseshiftfullbridgezerovoltageswitchingconverteritsparallelcurrentsharingte

2、chnology.ThedetailedanalysisofthesoftswitchingsingleloopvoltagecontrolparallelcurrentsharingtechniquetherelatedproblemsofthePSFBZVSconverterareproposedinthethispapertheresultofsimulationsexperimentsarealsoprovided.ThePSF

3、BZVSconverteriswidelyusedinthecaseofmediumhighpowerlevelsit’sahotspotofpowerelectronic.Thetwoarmsoftheconverterallwkatzerovoltageswitching(ZVS)conditionthusmanyadvantagesarebroughtfexamplelittlelossofpowersimplestructure

4、etc.Buttherealsoexistssomeproblemssuchasinherentdutycycleloss，theparasiticoscillationvoltagespikeontheoutputrectifierdiodes.Inthispaperthereasonsoftheseproblemsareanalyzedthesolutionsarepresented.Thereisalsoabriefintrodu

5、ctionofthetopologyofZVZCS.InthispaperaZVSconvertertopologyisproposedwhichadoptsclampingdiodesinthefmersideoftransfmerthustheparasiticoscillationiseliminated.Theoperationprincipleoftheconverterisdescribedthemethodofcompon

6、entparameterdesignispresentedsimulatedbyPSpice.OnthestatespaceanalysissmallsignalmodelanalysisofthistopologythispaperintroducesasingleloopcontrolsystembasedonUC3875.ThecontrolsystemispresentedsimulatedbyMatlab.Thispapera

7、nalysesthesystemcontrollooptosatisfytheperfmanceoftheconverter.alsobrieflyintroducecurrentmodeldoubleloopcontrol.Theexperimentalresultsfromaprototypeconverterincludetwo5.5kWmoduleindicatethat:maincircuit’sparameterisrigh

8、tZVSisachievedcrectlytheparasiticoscillationontheoutputrectifierdiodesisalmosteliminatedthecontrolsystemwksproperlycurrentsharingwkwellontwomodule.Thusthecrectnessavailabilityofthewholedesignisvalidated.Keywds:Phaseshift