步进电机知识 毕业论文外文翻译

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1、本科毕业论文翻译步进电机知识KNOWLEDGEOFTHESTPPERMOTOR学院（部）：电气与信息工程学院专业班级：电气08-5班学生姓名：指导教师：2012年6月1日17KNOWLEDGEOFTHESTPPERMOTORWhatisasteppermotor？Steppermotorisakindofelectricalpulsesintoangulardisplacementoftheimplementingagency.Popularlittlelesson:Whenthedriverreceivesasteppulsesignal

2、,itwilldriveasteppermotortosetthedirectionofrotationatafixedangle(andthestepangle).Youcancontrolthenumberofpulsestocontroltheangulardisplacement,soastoachieveaccuratepositioningpurposes;thesametimeyoucancontrolthepulsefrequencytocontrolthemotorrotationspeedandacceleration,

3、toachievespeedcontrolpurposes.Whatkindsofsteppermotorsub?Inthreesteppermotors:permanentmagnet(PM),reactive(VR)andhybrid(HB)permanentmagnetstepperusuallytwo-phase,torque,andsmaller,stepangleof7.5degreesorthegeneral15degrees;reactionstepisgenerallythree-phase,canachievehight

4、orqueoutput,stepangleof1.5degreesisgenerally,butthenoiseandvibrationarelarge.80countriesinEuropeandAmericahavebeeneliminated;hybridstepperisamixofpermanentmagnetandreactiveadvantages.Itconsistsoftwophasesandthefive-phase:two-phasestepangleof1.8degreeswhilethegeneralfive-ph

5、asestepangleof0.72degreesgenerally.ThemostwidelyusedStepperMotor.Whatistokeepthetorque(HOLDINGTORQUE)?Holdingtorque(HOLDINGTORQUE)isthesteppermotorpowerbutnorotation,thestatorlockedrotortorque.Itisthesteppermotoroneofthemostimportantparameters,usuallywhenthesteppermotortor

6、queatlowspeedneartheholdingtorque.Asthesteppermotor'soutputtorqueincreaseswiththespeedandcontinuousattenuation,outputpowerincreaseswiththespeedchange,sokeepthetorquesteppermotortobecomeameasureofoneofthemostimportantparameters.Forexample,whenpeoplesay2N.mthesteppermotorinc

7、aseofnospecialnoteistheholdingtorqueofthesteppermotorforthe2N.m.WhatisDETENTTORQUE？DETENTTORQUEisthesteppermotorisnotenergized,thestatorlocked17rotortorque.DETENTTORQUEtranslationinthecountrythereisnouniformway,easytomisunderstandus;thereactionisnotapermanentmagnetstepperm

8、otorrotormaterial,soitdoesnotDETENTTORQUE.Howmuchprecisionsteppermotor?Thegeneralaccuracy