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1、附錄AHybridSteppingMotorsandDrivesHybridsteppingmotorsderivetheirnamefromthefactthattheirconstructionisahybridbetweenpermanentmagnetandreluctancemotortopologies.Theirinherentpositionalaccuracymakesthemsuitableforawiderangeofmotioncontrolandindustrialpos
2、itioningapplications.Thisarticleexplainstheconstructionandoperationofthehybridsteppingmotor.Powerconvertertopologiesarepresentedwhicharecommonlyusedinhybridsteppingmotordrives.Methodsarediscussedofenhancingperformancebeyondthatachievablebytraditionalm
3、ethods.Itisshownthatthefallincostofpowerelectronicdevicesisenablingfurtherenhancementsofsteppingmotordrivetechnology,broadeningtherangeofapplicationsforthisclassofmotor.byJ.D.WaleandC.PollockHybridsteppingmotordriveapplicationsHybridsteppingmotorsderi
4、vetheirnamefromthefactthattheirconstructionisahybridbetweenpermanentmagnetandreluctancemotortopologies.HybridsteppingmotorsrangefromminiaturemotorshavingoutputsmeasuredinuNmanduWtomotorproducingupto60Nmoftorqueand2kWofshaftpower.Steppingmotorshavetrad
5、itionallybeenusedinapplicationsatspeedsupto2000/3000r/min,butrecentenhancementsindrivetechnologyandimprovementsinmotordesignareenablingtheoperatingspeedofsteppingmotorstobeincreased.Hybridsteppingmotorsareinherentlysuitedtoprovidingmotionindiscrete,sm
6、allsteps.Asaresult,theyareidealinapplicationswhereapieceofequipmentmustbemovedandpositionedaccurately,usuallyaccordingtoinstructionsfromadigitalcontroller.Steppingmotorsaresuitedtodrivinglow-speedhigh-frictionloadsandareidealforpoint-to-pointpositioni
7、ngsystemsandapplicationsneedingshortrapidmoves.Theyhavetheadvantageofbeingabletooperatewithoutfeedbackdevicesandthis,coupledwiththeabsenceofbrushes,makessteppingmotorsvirtuallymaintenancefree.Theygiveanon-cumulativeerroroveranydistanceandareinherently
8、digitalinoperationastheiroperationisbasedonconvertingelectricalpulsesintomechanicalmovementinfixedincrements.Steppingmotorsfindapplicationsinmanyindustrialareassuchaspackingmachines,conveyorsystems,robotarmmovement,liftandstackmachinetools.Des
