本科毕业论文外文翻译--单级单刀功率因数校正器AC-DC变换器

《本科毕业论文外文翻译--单级单刀功率因数校正器AC-DC变换器》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、咸宁学院本科毕业论文：外文翻译电子与信息工程学院本科毕业论文(设计)外文文献翻译译文题目：single-stagesingle-switchpowerfactercorrectionAC/DCconverter学生姓名：专业：指导教师：2010年3月原文，-11-咸宁学院本科毕业论文：外文翻译Single-stagesingle-switchpowerfactorcorrectionAC/DCconverterAbstractAsingle-stagesingle-switchpowerfactorcorrectionA

2、C/DCconverterisproposedinwhichthepowerfactorcorrection(PFC)inductorisconnedtedtoatapontheprimarywindingoftheDC/DCflybackconverterstage;thereisdirectenergytransferofapartoftheinputenergytotheoutputandtheDC-busvoltagefeedback.TheadditionaldischargepathinthePFCinduc

3、torandDC-busvoltagefeedbackeffectivelysuppressestheDC-busvoltageandincreasestheoverallefficiency.Experimentalresultsfora60Wconverterataconstantswitchingfrequencyof70kHzareobtainedtoshowtheperformanceoftheproposedconverter.ItisshownthatthevoltageacrosstheDC-buscap

4、acitorcanbeheldbelow405Veventhoughtheconverteroperatesinawiderangeofinputvoltages(90V-265VAC)andthemeasuredinputcurrentharmonicssatisfytheIEC。1IntroductionManyPFCAC/DCconvertershavebeenpresentedinrecentyears.PFCtechniquescanbedividedintotwocategories:asingle-stag

5、eapproachandatwo-stageapproach.Thetwo-stageapproachisthemostcommonlyusedapproach.Conventionaltwo-stagePFCconvertersinvolvetheuseofcascadingtwopower-processingstages,responsibleforpowerfactorcorrectionandoutputvoltageregualtion.APFCconverterisadoptedatthefront-end

6、toforcethelinecurrenttrackingthelinevoltageandanotherconventionalDC/DCconverteriscascadedafterthePFCstagetoobtainthedesiredtightlyregulatedoutputvoltage.Thisapproachcanobtainverygoodperformance,suchashighpowerfactor,andlowvoltagestress.However,duetotheuseoftwopow

7、er-processingstages,conversionefficiencyisreducedandanadditionalPFCstageaddscomponentsandcomplexity.Consequentlytheoverallcostincreases.Thetwo-stageapproachhasdisadvantagesoflowpowerdensity,controlcomplexity,andhighcost.Toreducetheoverallsizeandcost,anumberofsigl

8、estagePFCconvertershavebeendevelopedintheliteraturewitchessothatthePFCswitchanditscontrollercanbeeliminated.Thesingle-stageapproachisspeciallyattractiveinlow-c