Dynamic Analysis of Current Regulators for AC Motors Using Complex Vectors

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1、DynamicAnalysisofCurrentRegulatorsforACMotorsUsingComplexVectorsF.Briz,M.W.Degnert.R.D.LorenzttDept.ofElectrical,ComputertDept.ofMechanicalEngineeringandSystemsEngineering*Dept.ofElectricalandComputerEngineeringUniversityofOviedoUniversityofWisconsin-MadisonGijon33208,SpainMadison,WI53706Tel:

2、348-518-2289Fax:348-518-2068Tel:608-262-0556Fax:608-265-2316Email:fernando@hecate.etsiig.uniovi.esEmail:degner@cae.wisc.edu,lorenz@engr.wisc.eduAbstract-Theanalysisanddesignofcurrentregulatorsforthedifferentsynchronousframecurrentregulatorsisshowntopolyphaseacloadsispresentedusingcomplexvecto

3、rnotation.provideincreasedinsightintheinductionmotorcurrentTheACmotorcurrentregulationproblemisanalyzedbystudyingregulationproblem.Fromthisanalysis,severalimprovementsboththecommandtrackinganddisturbancerejectioncapabilityareproposed.ofthecurrentregulator.Theuseofcomplexvectornotationandthege

4、neralizationofclassicalcontroltoolslikerootlocus,11.INDUCTIONMOTORMODELING,CURRENTREGULATION,frequencyresponsefunctions,anddynamicstiffnessfunctionstoANDBACK-EMFDECOUPLINGcomplexvectorsprovideawayofcomparingtheperformanceofThenonlinearstateequationsgoverningtheelectricalanddiflerentcontroller

5、topologies.LimitationsintheperformanceofelectromagneticbehaviorofaninductionmotorusingthesynchronousframePIcurrentregulatorareoutlinedandcomplexvectornotation,withthestatorcurrentandtherotorseveralwaysofimprovingitsperformancearesuggestedandfluxasthestatevariables,are(1)and(2),[3]:investigate

6、d.I.INTRODUCTIONThesynchronousframePIcurrentregulatorhasbecomethestandardforcurrentregulationofpolyphaseacmachinesduetoitscapabilityofregulatingacsignalsoverawidefrequencyrange[1,2].Inareferenceframesynchronouswiththefundamentalexcitation,thefundamentalexcitationbecomesadcquantitythatiseasily

7、regulatedtothedesiredvalueusingaPIcontroller.EventhoughtheperformancecharacteristicsofThesuperscript'Is"denotesastationaryreferenceframeandpthesynchronousreferenceframePIcurrentregulatormayisthederivativeoperator.seemintuitive,themultiple-inp