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基于矢量控制的永磁同步电动机回馈制动的仿真与研究.docx

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基于矢量控制的永磁同步电动机回馈制动的仿真与研究 Abstract Thispaperdiscussesthesimulationandresearchoffeedbackbrakinginpermanentmagnetsynchronousmotorsbasedonvectorcontrol.Themainpurposeistostudythebrakingeffectandefficiencyofpermanentmagnetsynchronousmotorsundercertainconditionsandexplorethefeasibilityandeffectivenessoffeedbackbraking. Introduction Permanentmagnetsynchronousmotorsarewidelyusedinvariousindustriesduetotheirexcellentperformanceandhighefficiency.Brakingisanessentialfunctionofmotors.However,traditionalbrakingmethodssuchasmechanicalbrakingandelectromagneticbrakinghavedisadvantagessuchasmechanicalwearandlimitedabilitytocontrolbrakingforce. Feedbackbrakingbasedonvectorcontrolcaneffectivelysolvetheaboveproblemsandimprovethesafetyandreliabilityofthebrakingsystem.ThispaperusesMATLAB/Simulinktosimulatethevectorcontrolsystemofpermanentmagnetsynchronousmotorsandanalyzesthefeedbackbrakingeffectandefficiency. Mainbody 1.Principleofpermanentmagnetsynchronousmotorvectorcontrolsystem Thevectorcontrolsystemofpermanentmagnetsynchronousmotoriscomposedofarotorfield-orientedcontrol(FOC)methodandaproportional-integral-derivative(PID)speedcontrolmethod.TheFOCmethodcanaccuratelycontrolthestatorcurrenttomakeitorthogonaltotherotormagneticfield.Thestatorcurrentcanbedecomposedintoatorquecomponentandafluxcomponent,andthemotorcanbecontrolledaccordingtothesetwocomponents.ThePIDspeedcontrolmethodcanachieveaccuratespeedregulationbycontrollingthespeeddeviationthroughfeedback. 2.Feedbackbrakingprinciple Feedbackbrakingisachievedbyreversingthestatorcurrent.Thestatorcurrentgeneratesamagneticfieldthatinteractswiththerotormagneticfieldandproducesanelectromagneticbrakingforce.Theelectromagneticbrakingforcecancontrolthemotor'srotatingspeedandachieverapidandaccuratebraking. 3.Simulationandanalysisoffeedbackbraking Thesimulationparametersareasfollows:motorratedpower1kW,ratedvoltage220V,ratedspeed3000rpm,androtormomentofinertia0.002kgm².Thebrakingprocessincludesthreestages:acceleration,constantspeed,anddeceleration.Th