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1、附錄AHybridSteppingMotorsandDrivesHybridsteppingmotorsderivetheirnamefromthefactthattheirconstructionisahybridbetweenpermanentmagnetandreluctancemotortopologies.Theirinherentpositionalaccuracymakesthemsuitableforawiderangeofmotioncontrolandindustrialpositioningapplicati
2、ons.Thisarticleexplainstheconstructionandoperationofthehybridsteppingmotor.Powerconvertertopologiesarepresentedwhicharecommonlyusedinhybridsteppingmotordrives.Methodsarediscussedofenhancingperformancebeyondthatachievablebytraditionalmethods.Itisshownthatthefallincosto
3、fpowerelectronicdevicesisenablingfurtherenhancementsofsteppingmotordrivetechnology,broadeningtherangeofapplicationsforthisclassofmotor.byJ.D.WaleandC.PollockHybridsteppingmotordriveapplicationsHybridsteppingmotorsderivetheirnamefromthefactthattheirconstructionisahybri
4、dbetweenpermanentmagnetandreluctancemotortopologies.HybridsteppingmotorsrangefromminiaturemotorshavingoutputsmeasuredinuNmanduWtomotorproducingupto60Nmoftorqueand2kWofshaftpower.Steppingmotorshavetraditionallybeenusedinapplicationsatspeedsupto2000/3000r/min,butrecente
5、nhancementsindrivetechnologyandimprovementsinmotordesignareenablingtheoperatingspeedofsteppingmotorstobeincreased.Hybridsteppingmotorsareinherentlysuitedtoprovidingmotionindiscrete,smallsteps.Asaresult,theyareidealinapplicationswhereapieceofequipmentmustbemovedandposi
6、tionedaccurately,usuallyaccordingtoinstructionsfromadigitalcontroller.Steppingmotorsaresuitedtodrivinglow-speedhigh-frictionloadsandareidealforpoint-to-pointpositioningsystemsandapplicationsneedingshortrapidmoves.Theyhavetheadvantageofbeingabletooperatewithoutfeedback
7、devicesandthis,coupledwiththeabsenceofbrushes,makessteppingmotorsvirtuallymaintenancefree.Theygiveanon-cumulativeerroroveranydistanceandareinherentlydigitalinoperationastheiroperationisbasedonconvertingelectricalpulsesintomechanicalmovementinfixedincrements.Steppingmo
8、torsfindapplicationsinmanyindustrialareassuchaspackingmachines,conveyorsystems,robotarmmovement,liftandstackmachinetools.Des
