基于软开关全桥变换器的电动汽车充电电源设计

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1、北京交通大学硕士学位论文基于软开关全桥变换器的电动汽车充电电源设计姓名：李升申请学位级别：硕士专业：电力电子与电力传动指导教师：姜久春20080601ABSTRACTABSTRACT：Inpresenttimes，energycrisisandenvironmentalpollutionareincreasinglyserious．Airpollutioncausedbymotorvehicleexhaustsaccountsforalargeproportioninurbanairpollution．However,el

2、ectricvehicleasanon—pollutingtransportationtool，willhavegreatadvantagesinthemarket，meanwhile，thechargingtechnologyforelectricvehicleisalsoconstantlyandcontinuouslyimprovedandoptimized．As2008Olympicsisapproaching，ChinawillutilizeelectricvehiclesextensivelyinBeijing

3、suchasintheOlympicvillagetomakethe2008BeijingOlympicGamesarealGreenOlympicGames．Underthisbackground，thethesisintendstoresearchandsystemicallydesignpowersupplyforcharginguptheelectricvehicles，presentsachargingpowersupplysystem，ofwhichthemaincircuittopologyisazero—·

4、voltageandZerO—-current(zvzcs)full·-bridgeconvertertopology,resultinginarelativelyhighpowerfactorandhighefficiencychargingequipment．Firstly，thethesissummarizesthepresentresearchsituationofthechargerandchargecontrolstrategy,thencomparativelystudiesavarifyofsoft-swi

5、tchingfullbridgetopology,andfinallyselectsanovelZerO··voltageandzero·-current-switchingfull·-bridgeconverterusingasimpleauxiliarycircuit．Thesimpleauxiliarycircuit，whichconsistsofonesmallcapacitorandtwosmalldiodes，isaddedinthesecondary．Thesimpleauxiliarycircuit，whi

6、chconsistsofonesmallcapacitorandtwosmalldiodes，isaddedinthesecondary．Theauxiliarycircuitincludesneitherlossycomponentsnoradditionalactiveswitches，itsstructureandcontrolmethodissimple．ItcanprovideZVZCSconditionstoprimaryswitches，aswellastoclampsecondaryrectifiervol

7、tage．Basedonthepremiseofthereliabilityofpowersupply，itsparametersweredesignandcompute．Inaddition，sincetheconvertor’Sleadinglegswitches’ZVScannotberealizedinthelightloadperiod，thenovelZVZCSfullbridgeconverterwasimproved．Finally,itachievedsoft—switchinitsallloadrang

8、e．Theresultsoftheexperimentvalidatethefeasibilityofusingthetopologyinelectricvehiclecharger．KEYWORDS：ElectricVehicle；Charger；Zero··VoltageZero··CurrentS