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直流无刷电机驱动技术的研究英文.pdf

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长春工业大学人文信息学院毕业设计（论文）CommutationTorqueRippleReductioninBLDCMotorUsingPWM_ON_PWMModeGuangweiMeng,HaoXiong,HuaishuLiDepartmentofElectricalEngineering,NavalUniversityofEngineering,Wuhan,China.Abstract--ThepaperanalyzesthesteadycommutationprocessoftheBLDCmotorusingPWMmode,confirmsthecommutationtimetokeepnoncommutationphasecurrentamplitudeconstantduringcommutationperiodbywayofPWMintheperiodtoimplementthecompensationcontroltoeliminatecommutationtorquerippleunderbothlowspeedandhighspeedoperation,investigatestheeffectbyPWMmodeonathree-phasesix-state120°turn-onBLDCmotor,andpresentstorqueripplecompensationcontrolinPWM_ON_PWMmode,whichcannotonlyentirelyeliminatetorquerippleresultedfromthecurrentemergingintheturn-offphaseduringnon-commutationperiodbutalsocompensatetorqueripplecausedbythecommutationcurrentduringcommutationperiod.IndexTerms—BLDCmotor,commutation,PWM,torqueripple.I.INTRODUCTIONTheBLDCmotorshavebeenwidelyusedduetoitsfeatures－asimplestructure,goodspeedadjustingperformance,highpowerdensity,lownoiseandsimplecontrol,etc.ItisahotspottosuppressthetorquerippleandimprovethecontrolperformanceofaBLDCmotorwiththetrapezoidalbackemf.BLDCmotorsusuallyoperateinallkindsofPWMmodes,whichnotonlyaffectthedynamiclossofpowerswitchesandradiationuniformity,butalsoinfluencethetorqueripple.Itisaneffective1长春工业大学人文信息学院毕业设计（论文）waytosuppressthetorqueripplethroughchangingdcbuschoppercontroltoremainnon-commutationphasecurrentamplitudeconstant,butitresultsintoamorecomplextopology[1]-[3].Itisjustfitforlowspeedapplicationstocontrolnon-commutationphasecurrentamplitudetoregulatethecommutationtorqueripple[4].ItisanalyzedabouttheinfluenceresultedfromPWMONmodeonthetorqueripplein[5].Theideasin[1]-[3]aretoadoptdifferentsuppressionmethodsindifferentspeedinterval,buttheydon’ttaketheeffectbyPWMmodesonthesysteminaccount.Thepredictivecurrent,neuralnetworkcontrolandactivedisturbancerejectioncontroletcareintroducedtosuppressthetorqueripplein[9]-[12],butthecontrolalgorithmismorecomplicatedandharderforrealization.D