机械专业英文翻译论文（外文翻译）

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1、原文说明原文说明的内容是：文章阐述了电机的工作原理、发展过程、以及伺服电机的工作控制原理。并且举例说明了伺服电机所适用的场合。题名Servomotor^ElementsandApplications作者NEWMARKER来源佳工机电网HowDoesaMotorWork?Anelectricmotorconvertselectricityintomechanicalmotion.Electricmotorsareusedinhouseholdappliances,electricfans,remote-controlledtoys,andinthousandsofotherappl

2、ications.Theelectricmotorgrewoutofoneoftheearliestdiscoveriesinelectricscience一Arago'srotations.In1824,FrancoisAragodiscoveredthatamagneticneedlesuspendedoveracopperdiskwouldrotatewhenthediscwasspun.Thenextyear,computerpioneerCharlesBabbageandastronomerJohnHerschelshowedthattheactioncouldbere

3、versed:spinningamorepowerfulmagnetabovethecopperdiskwouldspinthecopperdisc.Then,in1831,MichaelFaradayconductedexperimentsthathelpedexplainwhythistookplace・Whilethislaidthegroundworkfortheelectricmotor,itwasanotherhalfcenturybeforeelectricmotorsweredoingusefulwork.Overthenextfewdecadesmanyinve

4、ntorsmadeimproveddevicesforturningelectricityintomotion.OneofthesewasHippolytePixii's1832improvementcalledthecommutator,whichswitchedtheflowofcunentbetweentwoormoresetsofstationaryelectromagnetstokeepamotorcontinuouslyrotating.ThomasDavenportwasthefirsttobuildanelectricmotorlargeenoughtobeuse

5、dinindustry,andhewasalsothefirsttoseekapatentonamoto匚Soonelectricmotorswerebeingusedforsuchthingsastransportation.Moritz-HermannDeJacobiusedanelectricmotoronaboatontheNevaRiver,andCharlesG.Pageusedonetobuildasmalllocomotive.Aftertheappearanceofcommercialelectricpowersystemsinthe1880s,largerel

6、ectricmotorswerepossible.Edisonencouragedtheuseofelectricmotorsinindustrialapplicationsanddesignedseveralnewelectricmotorsforthatpurpose.Animportantchangecameinthelater1880sand1890s,whenelectricpowercompaniesbeganconsideringtheswitchtoalternatingcurrent.Alternatingcurrentwasperfectforthedistr

7、ibutionofelectricpoweroverlongdistances,anditworkedwellwiththeEdisonelectriclamp,butnopracticalACmotorexisteduntiltheworksofGalileoFerrarisinItalyandNikolaTeslaintheUnitedStates.Tesla'scontributionsarerememberedtodaymorethanFerraris9inpartbec