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永磁同步电机直接转矩控制系统研究与仿真.docx

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永磁同步电机直接转矩控制系统研究与仿真 Abstract Thispaperpresentstheresearchandsimulationofadirecttorquecontrolsystemforpermanentmagnetsynchronousmotors.Thepaperfirstintroducestheprincipleandcharacteristicsofpermanentmagnetsynchronousmotors,andthenexplainsthedesignandimplementationofthedirecttorquecontrolsystem.Thesimulationresultsarealsopresented,demonstratingtheeffectivenessandstabilityofthecontrolsystem. Keywords:permanentmagnetsynchronousmotor,directtorquecontrol,simulation Introduction Withthedevelopmentofmodernelectricalsystems,permanentmagnetsynchronousmotors(PMSMs)havebecomewidelyusedduetotheirhighefficiency,lownoiseandmaintenancerequirements.PMSMshaveastrongmagneticfieldprovidedbypermanentmagnets,whicheliminatestheneedforrotorwindingsandreducespowerlossandheating.Directtorquecontrol(DTC)isacontroltechniqueforPMSMsthatdirectlycontrolsthestatorcurrenttoobtainthedesiredtorquewithouttheneedforspeedsensors. TheobjectiveofthispaperistostudyandsimulateadirecttorquecontrolsystemforPMSMs.ThefollowingsectionswillintroducetheprincipleofPMSMs,explainthedesignandimplementationofthedirecttorquecontrolsystem,andpresentthesimulationresults. PrincipleofPMSMs PMSMshavearotorwithpermanentmagnetsandastatorwithwindings,whichinteractthroughamagneticfield.TherearetwotypesofPMSMs:surface-mountedpermanentmagnet(SPM)motorsandinteriorpermanentmagnetmotors(IPMs).SPMmotorshavemagnetsattachedtothesurfaceoftherotor,whileIPMshavemagnetsembeddedinsidetherotor. Thestatorwindingsareenergizedtoproducearotatingmagneticfieldthatinteractswiththerotormagnets.Asaresult,therotorrotateswithsynchronousspeedthatdependsonthefrequencyofthestatorcurrentandthenumberofpolepairs.Thetorqueproducedbythemotorisproportionaltotheproductofthemagneticfieldandthecurrent. DesignandimplementationofDTCsystem Thedirecttorquecontrol(DTC)systemisacontroltechniquethatusesthestatorcurrenttodirectlycontrolthetorqueofthemotor.TheDTCsystemhasaninnerloopthatcontrolsthestatorcurrent,andanouterloopthatcontrolsthetorqueandspeedofthemotor. Thedesign