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1、附錄AHybridSteppingMotorsandDrivesHybridsteppingmotorsderivetheirnamefromthefactthattheirconstructionisahybridbetweenpermanentmagnetandreluctancemotortopologies.Theirinherentpositionalaccuracymakesthemsuitableforawiderangeofmotioncontrolandindustrialpositionin
2、gapplications.Thisarticleexplainstheconstructionandoperationofthehybridsteppingmotor.Powerconvertertopologiesarepresentedwhicharecommonlyusedinhybridsteppingmotordrives.Methodsarediscussedofenhancingperformancebeyondthatachievablebytraditionalmethods.Itissho
3、wnthatthefallincostofpowerelectronicdevicesisenablingfurtherenhancementsofsteppingmotordrivetechnology,broadeningtherangeofapplicationsforthisclassofmotor.byJ.D.WaleandC.PollockHybridsteppingmotordriveapplicationsHybridsteppingmotorsderivetheirnamefromthefac
4、tthattheirconstructionisahybridbetweenpermanentmagnetandreluctancemotortopologies.HybridsteppingmotorsrangefromminiaturemotorshavingoutputsmeasuredinuNmanduWtomotorproducingupto60Nmoftorqueand2kWofshaftpower.Steppingmotorshavetraditionallybeenusedinapplicati
5、onsatspeedsupto2000/3000r/min,butrecentenhancementsindrivetechnologyandimprovementsinmotordesignareenablingtheoperatingspeedofsteppingmotorstobeincreased.Hybridsteppingmotorsareinherentlysuitedtoprovidingmotionindiscrete,smallsteps.Asaresult,theyareidealinap
6、plicationswhereapieceofequipmentmustbemovedandpositionedaccurately,usuallyaccordingtoinstructionsfromadigitalcontroller.Steppingmotorsaresuitedtodrivinglow-speedhigh-frictionloadsandareidealforpoint-to-pointpositioningsystemsandapplicationsneedingshortrapidm
7、oves.Theyhavetheadvantageofbeingabletooperatewithoutfeedbackdevicesandthis,coupledwiththeabsenceofbrushes,makessteppingmotorsvirtuallymaintenancefree.Theygiveanon-cumulativeerroroveranydistanceandareinherentlydigitalinoperationastheiroperationisbasedonconver
8、tingelectricalpulsesintomechanicalmovementinfixedincrements.Steppingmotorsfindapplicationsinmanyindustrialareassuchaspackingmachines,conveyorsystems,robotarmmovement,liftandstackmachinetools.Des
