基于51单片机步进电机毕业设计外文资料原文与译文

外文原文SteppingmotorapplicationandcontrolSteppingmotorisanelectricalpulsewillbeconvertedintoangulardisplacementoftheimplementingagencies.Putitinsimplelanguage-speaking:Whenthestepperdrivepulsesignaltoareceiver,itdrivessteppermotorrotationdirectionbysettingafixedpointofview(andthestepangel).Youcancontrolthenumberofpulsestocontroltheamountofangulardisplacement,soastoachievethepurposeofaccuratepositioning;Atthesametime,youcanbycontrollingthepulsefrequencytocontrolthemotorrotationspeedandacceleration,soastoachievethepurposeofspeed.SteppingmotordirectlyfromtheAC-DCpowersupply,andmustusespecialequipment-steppermotordrive.Steppingmotordrivesystemperformance,inadditiontotheirownperformancewiththemotorontheoutside.butalsotoalargeextentdependonthedriveisgoodorbad.Atypicalsteppermotordrivesystemisoperatedbythesteppermotorcontroller,steppermotordrivesandsteppermotorbodyiscomposedoftherrparts.Steppingmotorcontrollerstepperpulseanddirectionsignal,eachmadeofapulse,steppermotor-drivensteppermotordrivesarotorrotatingstepangle,thatis,step-by=stepfurther.Highorlowspeedsteppermotor,orspeed,ordeceleration,startorstoppulsesareentirelydependentonwhetherthelevelorfrequency.Decidethedirectionofthesignalcontrollersteppermotorclockwiseorcounterclockwiserotation.Typically,thesteppermotordrivecircuitfromthelogiccontrol,powerdrivercircuit,protectioncircuitandpowercomponents.Steppingmotordrivecontroller,oncereceivedfromthedirectionofthesignalandsteppulse,thecontrolcircuitonapre-determinedwayoftheelectricalpower-phasesteppermotordrivecontroller,oncereceivedfromthedirectionofthesignalandsteppulse,thecontrolcircuitonapre-determinedwayoftheelectricalpower=phasesteppermotorexcitationwindingsoftheconductionorcut-offsignal.Controlcircuitoutputsignalpoweramplifier,whichissteppermotordrivenpowerdrivepart.Powersteppermotordrivecircuittocontroltheinputcurrentwindingtoformaspaceforrotatingmagneticfiledexcitation,therotor-drivenmovement.Protectioncircuitintheeventofshortcircuit,overload,overheating,suchasfailuretostoptherapidandmotor.Motorisusuallyforthepermanentrotor,whenthecurrentflowsthroughthestatorwindings,thestatorwindingsproduceamagneticfieldvector.Themagneticfieldwillleadtoarotorangleofrotation,makingapairofrotorandstatormagneticfielddirectionofthemagneticfielddirection.Whenthestatorrotatingmagneticfieldvectorfromadifferentangle.Alsoastherotormagneticfieldtoapointofview,Anelectricalpulseforeachinput,themotorrotationanglestep,Ttsoutputandinputoftheangulardisplacementisproportionaltothepulses,withpulsefrequencyproportionaltospeed.Powertochangetheorderofwinding,theelectricalwillbereversed.Wecan,therefore,controlthepulsenumber,frequencyandelectricalpowerwindingsofeachphasetocontroltheorderofrotationofsteppermotor.Steppingmotortypes:Permanentmagnet(PM).Magneticgenerallytwo-phasestepper,torqueandaresmallerab=ndgenerallysteppingangleof7.5degreesor15degrees;putmorewindforair-conditioning.Reactive(VR),thedomesticgeneralcalledBF,haveacommonthree-phasereaction,stepangleof1.5degrees;alsohavefive-phasereaction.Noise,notorquehasbeensetatalargenumberofout.Hybrid(HB),conmmontwo-phasehybrid,five-phasehybrid,therr-phasehybrid,four-phasehybrid,two-phasecanbecommonwiththefour-phasedrive,five-phase,three-phasemustbeusedwiththeirdrives;Two-phase,four-phasehybridstepangleis1.8degreesmorethanasmallsize,greatdistance,andlownoise;Five-phasehybridsteppingmotorisgenerally0.72,themotorstepanglesmall,highresolution,butthecomplexityofdrivecircuits,wiringproblems,suchasthe5-phasesystemof10lines.Three-phasehybridsteppingmotorstepangleof1.2degrees,butaccordingtotheuseof1.8degrees,thethree-phasehybridmorepolewillhelpelectricfoldersymmetricangle,itcanbemorethantwo-phase,five-phasehighaccuracy,theerrorevensmaller,runmoresmoothly.Steppermotortomaintaintorque:steppermotorpowermeansnorotation,thestatorlockedrotoetorque.Itisasteppermotor,oneofthemostimportantparameters,usuallyinthelow-speedsteppermotortorqueatthetimeofclosetomaintainthetorque.Asthesteppermotoroutputtorqueincreaseswiththespeedofconstantattention,theoutputpoweralsoincreaseswiththespeedofchange,soastomaintaintorqueonthesteppermotortomeasuretheparametersofoneofthemostimportant.Forexample,whenpeoplesaythatthesteppermotor2N.m,intheabsenceofspecialcircumstancesthatmeansformaintainingthetorqueofthesteppermotor2N.m.Precisionsteppermotoes:steppermotorstepangleaccuracyof3-5%,notcumulative.Steppermotortoallowtheminimumamountofsurfacetemperature:Steppermotorcausesthemotorremperatureistoohighthefirstmagneticdemagnetization,resultinginlossoftorquedowmevenfurther,sothemotorsurfacetemperatureshouldbethemaximumalloweddependinginthemotordemagnetizationofmagneticmaterialpints;enerallyspeaking,themagneticdemagnetizationpointsareabove130degreesClesius,andsomeevenashighas200degreesCelsius,sothesteppermotorsurfacetemperatureof80-90degreesCelsiusisnormal.Startfrequencyofno-load:thesteppermotorincaseofno-loadtothenormalstartofthepulsefrequency,ifthepulsefrequencyishigherthanthevalueofmotordoesnotstart,possibletolosestepsorblocking.Inthecaseofth