基于 DSP 的无刷直流电机

DSPDSPClassifiedIndexTM33DissertationfortheMasterDegreeinEngineeringTHECONTROLSYSTEMOFBLDCMBASEDONDSPCandidateLuzongfengSupervisorZhangchunxiAcademicDegreeAppliedforMasterofEngineerSpecialtyPowerElectronicsandElectricPowerTransmissionDateofOralExaminationMarch,2005UniversityHarbinUniversityofScienceandTechnology--IDSPTI16DSPTMS320LF2407ADSPDSP(PWM)(BLDCM)DSP--IITheControlSystemofaBrushlessDCMotorBasedonDSPAbstractThebrushlessDCmotorcontrolsystemisanovelspeed-variablesystem.Itoffersexcellentcharacteristicsofoperation,controlandeconomy,andshowsgreatdevelopingpotentiality.Furthermore,ourcountryhasrichrare-earthresources,andmanufactureofrare-earthmagnetsteelshasalreadyreachinternationalstandards.Ithasstrategicsignificancethatthecompetitivepowerofourcountry’smechanicalandelectricalproductswillbeenhancedininternationalmarkets,ifmakingfullbenefitofandgivingfullplaytoouradvantagesinthisfield,anddevelopingrare-earthpermanent-magnetmotorstoformaseriesofproductsofBLDCM.Inviewofabove-mentionedreasons,thisthesismakesadetailedstudyonthecontroltechnologyandmethodstoBLDCM.TexasInstrumentsoffersanewDSPcontrollerfamilyreferencedTMS320-LF2407A,whichisspecificallydesignedfortheneedsofdigitalmotorcontrol.Inasinglechipapplication,thisdevicecombinesafixedpointDSPcorewithmicro-controllerperipherals.Thischipisabletoperformsophisticatedcontrolschemes.OnthebasisofthesummaryforthedevelopmentandapplicationofpermanentmagnetbrushlessDCmotorspeed-variablesystem,thisthesisintroducesacontrolsystem,whichusesDSPtocontrolthecommutationandspeedofBLDCM.Thebasicstructure,operationalprincipleanddesignmethodofthissystemaresetforthinthisthesis.Thethoughtofhardwaredesignandsoftwareprogrammingisintroducedaswell.Atlast,theexperimentalresultsarepresented.KeywordsBrushlessDCMotor(BLDCM);DSP;Pulse-widthModulation………………………………………………………………………………….Abstract…………………………………………………………………………….1................................................................................................................11.1...........................................................................................................11.2...................................................................21.3...........................................................................31.4.......................................................................................82..........................................................................................102.1.................................................................................................................102.2.....................................................................................................102.3.................................................................................112.3.1..................................................................122.3.2..............................................................14....................................................152.4.....................................................................................162.4.1..................................................................................162.4.2..................................................................................182.5.....................................................................................192.5.1......................................................................192.5.2..............................................................................202.5.3..............................................................................212.6.................................................................................222.7.................................................................................232.7.1..........................................................................232.7.2TMS320LF2407ADSP....................................................................242.7.3..........................................................................................252.8.........................................................................................................263......................................................................................273.1.........................................................................273.1.1PWM....................................................................................283.1.2DSP..................................................................................293.1.3..............................................................................313.1.4..............................................................................343.2.................................................................................................363.2.1..........................................................................................363.2.2......................................................................................................363.2.3..............................................................................