大功率移相全橋變換器若干關(guān)鍵技術(shù)研究

1、加夕≥Z碩士學(xué)位論文⑧論文題目大功率移相全橋變換器若干關(guān)鍵技術(shù)研究作者姓名指導(dǎo)教師學(xué)科(專業(yè))所在學(xué)院周玉飛陳國柱教授、博導(dǎo)電力電子與電力傳動電氣工程學(xué)院提交日期2007年2月AbstractThisthesisstudiesthekeytechnologiesinthefoilbridgeDC／Deconveners，includingsolutionstosoftswitching，ditierencesbetweenzero—vo

2、ltageswitchingandzerovoltagezerocurrentswitchingtopologies，methodsforzerocurrentswitchingforlagginglegsinZVZCStopologies，commoncontrolstratigiesandtheirdifferencesstructuredesignconsideringthermalandEMIproblems，stepbyste

3、pdesignofa15kWprototypeandnoveloptimizedmethodsinmagneticcomponentsandfeed—backcontroldesignZerovoltagezerocurrentswitchingfullbridgeDC／DCconverteralsoknownasZVZCSFBDC／DCconverteLisoneofthemostpopulartopologiesinhigh—pow

4、erDC／DCconverters，duetoitsreliabilityitsapplicabilityforIGBTsinhigh—voltageapplications，anditsefficiencywhenpoweringwhetherlightloadorfullloadZVZCSFBcircuithasbeenstndiedsinces90’sinlastcenturywhilebeingthefocusintheindu

5、stryAlargevarietyoftopologies，inwhichthereare110lessthall10solutionstotherealizationofzerocurrentswitchinginthelag舀nglegwithadvantagesanddisadvantagesineachoneofthemandcontrollingstrategieswhichincludcphaseshifledcontrol

6、andlimiteddnalpolaritycontrol，arepresentedThisthesiscomparesthesetopologiesandcontrolmethodsbystudyingtheirprinciples，derivingtheircharacteristics，andsummarizingtheirprosandconsindifferentconditionsOnthecontraryanotherso

7、ftswitchingfull—bridgeDC／DCconVerter——theZVSfullbridgeDC／DCcircuit，isalsostudiedforthediscussionintegralityThelowefficiencywhenpoweringlightloads，thedifficultyinimplementingZVSinthelaggingleg，thehighloopcurrentinswitchin

8、gdeviceanddiodes，aswellasthereladvelyseveredutyratiolossinZVSFBcircuitsareanalysedinthisthesisThethesisprovidesthedesignofa疊l湃prototypeintroducingtheZVZCSPSFBcircuitforelectricsystemoperation，withaw如sisoftherealizationof

9、everymodulesThekeytechniquessuchasthechoiceofscheme，thedesignoffeed—backcontrolloop，thesnubbingofvoltagespikeinthesocondarysideofthetransformerandthermalandEMIproblemsarealsopresentedNewthoughtsontheoptimizingdesignofmag

10、neticcomponentsandmodelingofpowersupplysystems，whichareextremelyimportantforswitching—modepowersupplyareinspiredduringthedesignprocedureThenovelmethods’principleandapproacharegivenintheap—pendixesAlsopracticabilityisdisc