基于UC3842控制芯片的Boost变换器的设计

第32卷第3期2008年6月JOURNALOFDAQINGPETROLEUMINSTITUTEVol.32No.3Jun.2008:2007-11-08;:;::(1962-),,,.UC3842Boost高微1,单清林2,朱英3(1.,163318;2.,163414;3.,163511):Boost,.UC3842,Boost,UC3842Boost,.,Boost,,,.:Boost;;;:TM743:A:1000-1891(2008)03-0071-03Boost,[1].Boost,,70W,Boost[2,3].,,Boost.,Boost,UC3842,Boost.1Boost变换器及UC3842控制芯片1.1Boost图1Boost变换器电路Boost,,1.(MOS),,[4],2.(1).,(),(),2(a).,.图2变换器充电放电过程等效电路.,,.,.(2).,(),2(b).,0,0.,#71#,,,,.,.,.,[5].1.2UC3842UC3842,16~30V,15mA.;,MOSFET;;PWM,100%.,,.2电路设计及仿真2.1UC3842,Boost,Boost.:Vi=18V,Vo=60V,Io=1.5A,fU49kHz,1%.UC3842Boost3.图3UC3842控制Boost电路3Vi,.UC3842,L.,Vi/L,L.,L,D(Vo-Vi)/LC5.,.2.1,,2.5V,.2,Rx,,LRxPWM,,..,Boost,3LS.Dmax:DmaxUVo-ViVo=0.7.,#72#322008L\2(Vi-VS)Dmax(1-Dmax)Iof=97.7LH,(1):VS,VS=0.9V.10%,,$ILIL20%~30%,$ILL,,C2,30%,$IL=30%@IL=30%@Io1-Dmax=1.5A.(2)(1)(2)$L\2(Vi-VS)Dmax(1-Dmax)Iof=97.7LH.LSLS=L+$L=185.4LH.(3)LSILPILP=IL+$IL=6.5A.150~220LH(20%),6.5A...,,,.,.2.2UC3842Boost4.4,18V,Boost,60V,90W.,UC3842Boost.图4UC3842控制芯片控制Boost电路仿真结果3结束语BoostUC3842,Boost,,Boost,.:[1],.BoostEMI[J].,2003,20(2):6-9.[2],,,.Boost[J].,2003,20(11):35-38.[3],,.BoostPFC[J].,2005,206(15):71-73.[4],.Boost[J].,2001,24(1):34-36.[5],,.BoostPSpice[J].,2006,22(1):11-13.#73#3:UC3842BoostDesignofboostconverterbasedonUC3842/2008,32(3):71-73GAOWei1,SHANQing-lin2,ZHUYing3(1.ElectricityandInformationEngineeringCollege,DaqingPetroleumInstitute,Daqing,Hei-longjiang163318,China;2.SeniorHighSchoolofForeignAffairs,Daqing,Heilongjiang163318,China;3.OilRecoveryPlantNo.4,DaqingOilfieldCorp.Ltd.,Daqing,Heilongjiang163511,China)Abstract:ThispaperaimsatlimitationofBoostconverterthatitcannotachievegreaterpoweroutput,andaccordingtofunctionandcharacteristicofUC3842,combinedBoostconfiguration,broughtforwardadesignwaythatusesUC3842tocontrolBoostconverter.Hereworktheoriesandparameterareana-lyzed.InthiswaytheoutputpowerofBoostconverterisgreatlyimproved,fewerouterelementsareneeded,stableinoperationandconvenientforcontrol.Keywords:Boostconverter;powersupplyswitching;soft-switching;hard-switchingIncreasingthesuccessrateofsubscribersreceivingcallsintheSCDMAsystem/2008,32(3):74-76WANGXiang-nan,MIChao(CommunicationsCorporation,DaqingPetroleumAdministrationBureau,Daqing,Heilongjiang163453,China)Abstract:Inordertoincreasethesuccessrateofsubscribersreceivingcallsandimprovetheservicequa-lityofSCDMAnetwork,ananalyticalmethodoflarge-scalecallingtestbasedonrelevanttheorieshasbeenadopted,whichhashelpeddeterminethefactorsthatmightafectthesuccessrateofsubscribersre-ceivingcalls.Centeredonthesefactors,wemadeanin-depthresearchintotheindicationoftheactiva-tionanddeactivationoftheBSS(BaseStationSubsystem)andresolutionstrategiesandestablishedapro-jecttoadjusttheB/IpropertyoftheglobalbasestationsaswellasSCALE.Throughtheapplicationoftheprojectmentionedabove,customersoftheSCDMAcanenjoyabettersuccessrateofsubscribersre-ceivingcalls,withtherelatedqualificationsimproved.Keywords:SCDMA;successrateofsubscribersreceivingcalls;theindicationoftheactivationanddeac-tivationoftheBSS;resolutionstrategiesAttitudeplanningofdua-larmFFSRbasedongeneticalgorithm/2008,32(3):77-80GAOSheng1,LIYan-qiu2,CHANGYu-Lian1,XUXiao-zheng3,ZHAOMing-quan4(1.SchoolofMechanicalScienceandEngineering,DaqingPetroleumInstitute,Daqing,Hei-longjiang163318,China;2.DownholeServiceSub-Company,Daqing,OilfieldCorp.Ltd.,Daqing,Heilongjiang163458,China;3.SafetyQualityandEnvironmentPreservationDepartmentofDaqingOilfieldRealEstateGroup,Daqing,Heilongjiang163453,China;4.OilRecoveryPlantNo.6,DaqingOilfieldCorp.Ltd.,Daqing,Heilongjiang163114,China)Abstract:Inordertostudytheattitudeplanningofdua-larmfreefloatingspacerobots(FFSR),thispa-perfirstgivesthekinematicsgeometrymodelofdua-larmFFSR,andthenintroducesgeneralizedJacob-ianmatrixtodescribethecoupledrelationshipbetweenrobotarmsanditsbody.Theattitudeplanningofdua-larmFFSRisstudiedbyusingGeneticAlgorithm,inwhichtheleastconfigurationinfluenceofro-botbodyissettobetheoptimizedgoal.Simulationresultsshowthealgorithomhastheadvantagesofhighaccuracyanduniversality.Keywords:freefloatingspacerobot;geneticalgorithm;coordination;attitudeplanningDesignofintegratedcontrolcompensationsystemforintensitymodulatedopticalfibersensor/2008,32(3):81-84JINYuan-qiang,MAHu-iping,ZHOUYan,YANGL-ijian(MechatronicEngineeringCollege,HarbinInstituteofTechnology,Harbin,Heilongjiang150001,China)Abstract:Anewcompensationprojectofduallightpathdeepfeedbackintegratedcontrolisputforwardinthepaper,whosecompensationmechanismisdescribed.Withcoaxialthree-layerfiberstructureastheprobe,asingle-modefiberasemittingfiberandduallightpathasreceivingsection,thisprojectcom-binesdeepfeedbackautomationcontroltechniquewithduallightpathreceivingandcommon-modein-hibitiontechnique.Theexperimentindicatesthattheprojectdesignisproperandtheerroraftercom-pensationislessthan0.5%,whichcaneliminatestheeffectoflightsourceintensityfluctuationandre-flectivityvariationofmeasuredsurfaceonthesystemmeasuringprecisionandthestabilityandhasagoodcompensationeffect.Keywords:opticalfibersensor;intensitymodulation;compensationtechniqu