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ID:23284428
大小:790.90 KB
页数:66页
时间:2018-11-06
《基于dsp无桥功率因数校正技术的研究》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、Subject:ResearchonbridgelessPowerFactorCorrectiontechnologybasedonDSPSpecialty:PowerElectronicsandElectricDriveName:XiaoHaiming(Signature)Instructor:LiuShulin(Signature)ABSTRACTReducingElectricalnetworkharmonicpollutionwhichtraditionalrectifiersproduce,andimprovingthepowerfactorofthedevi
2、ce,havebeenpayingcloseattentionbyscholarsathomeandabroad.Withthecontinuousdevelopmentofdigitalcontroltechnology,mostofthecontrolstrategyhavebeenrealizedthroughthedigitalsignalprocessors,anddigitalcontrolhasbecomethetrendofthedesignofswitchingpowersupplyproducts.Inthispaper,thedigitalcont
3、rolplatformisbuiltbythedigitalsignalprocessor(dsp)torealizethedigitizationofpowerfactorcorrectioncontrol.Inthetopologyaspect,usingthedual-couplinginductancebridgelessBoostPFCcircuit.Thedual-couplinginductancebridgelessBoostPFCcircuitnotonlyretainstheadvantagesthatthebridgelessBoostPFCcon
4、verterdoeshavetherectifierbridge,butalsoachievestheboostdiodenaturalturn-offandtheswitchingzero-currentturn-on,enhancingthecircuitefficiencyfurtherly.Inthecontrolstrategyaspect,usingthesingle-cyclecontrol.Thisnovelcontrolstrategyusethepulseandthenon-linearattributeofswitchconverterstoach
5、ievethetransientcontrolofthechoppervoltageandcurrentaverage.Inthesamplingalgorithmaspect,usinganimprovedsingle-cyclesampling.Whenthedutycycleisgreaterthan0.5,wewillselectthesamplingpointonthemidpointofthecurrentrisingedge,otherwiseonthemidpointofthefallingedge,toavoidtheimpactofthehighfr
6、equencynoiseonsystemperformancewhentheswitchturnonorturnoff.Finally,thisarticleusetheclassicalPIcontrollertocontroltheerrorsignal,whichmaketheoutputvoltageremainconstant.BuildingthesystemmodelofthewholecircuitwiththeSimulationtools——SimulinkinMatlab.Modelingandsimulatingthedual-couplingi
7、nductancebridgelessBoostPFCcircuittoverifythefeasibilityofthesystemtheory.Producingaprototywith100kHzand300W(400V/0.75A)basedonthedual-couplinginductance2dDBPFCconverter.UsingtheC2000seriesTMS320F2808DSPchipswhichmadeinTIcorporationfordigitalcontrol.,Usingthetheoryofsingl
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