空间矢量脉宽调制在三相逆变电源中应用

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1、机床与液压Sep．2014HydromechatronicsEngineeringVo1．42No．18DOI：10．3969／j．issn．1001—3881．2014．18．021Applicationresearchonthree·phaseinverterwithspace—vectorpulsemodulationHong—liLYUDepartmentofInformationEngineering，TangshanCollege，Tangshan063000，ChinaAbstract：Thepaperintroducedthecontrolscheme

2、ofvoltagespace-vectorpulsemodulationforthethree。phaseinverter．ThesimpleSVPWMalgorithmisderivedindetail．ThedigitalcontrolsystemwithTMS320F2812DSPasprocessorandIGBTaspowerdeviceisdesigned．Theex—perimentalwaveformshowsthatthecontrolsystemiseasytorealize，thepowerfactorisnearlyunityandwoulde

3、nsurethegoodpowersupplyquality．Keywords：Inve~er，Voltagespace-vector，Vectorcomposition，Two-phasemodulation，Detec-tingcircuitputvoltageandtheswitchlosscanbereduced[2]．1．IntroductionTheconventionalSVPWMalgorithmiscomplexityandneedstoberealizedbythehigh--speedmicropro-Thetechnologyofpulsewi

4、dthmodulationhascessoralthoughitcanbegottenafastdynamicre．beenusedintheinverterswidely．Inrecentyears．sponse．SotheimprovedSVPWMalgorithmhasbe—voltagethree—phaseinvertercontrolwithvoltagespacecomeahotspot．Accordingtothedifierentcombina—vectorPWMcontroltechniquehasbeenusedexten—tionanddiff

5、erentworktimeofzerovectorsitcansivelyandhasagoodprospectfordevelopment．ThehavedifferentmodulationmethodsforSVPWM．A．spacevoltagepulsewidthmodulation(SVPwM)mongthesemethods，thetwo-phasemodulation，methodisbasedonachievingtheidealcircularfluxwhichtheswitchdeviceofanybridgearmswillmain—ofasy

6、nchronousmotorswhenthepowerlineprovidestainthecertainswitchstateonthetime60。ofwithinsymmetricsinusoidalthree—phasevoltage[1]．Theanyhalfcycle。hasasmallerswitchlossf3]．actualfluxacquiringfromthedifferentswitchmodesofinverterbridgealTfldevicesisusedtoapproachthe2．TheprincipleofSVPWMidealfl

7、uxwave．ThedeviationofthemdeterminedtheswitchstatesofinverterbridgeaimdevicesandsoThegeneral~equencyconvertersismostlyusedthePWMwaveisachieved．ComparedwithSPWMthediodebridgesasrectifiersandusedthesemicon．control，theSVPWMcontrolschemehavesomead．ductorswitchdevices(suchasIGBTs1orI