永磁同步电动机外文翻译范文.docx
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永磁同步电动机外文翻译范文
毕业设计(外文翻译)
题目永磁同步电动机直接转矩控制系统
系(院) 自动化系
专业 电气自动化技术
学生姓名
学 号
指导教师
职 称
2011年6月15日
Alwaysmagnetic belt synchromotordirect torquecontrolsystem
0-preface
Synchromotorbecauseof havingpower factor higher-,run — timeefficiencyhigher —,stabilitygood, the revolvingspeedHengsettlestowaitamerit,isextensivelybeenappliedtoindustrialproductionamid。
Thestartingfaultthatacquaintswithsynchromotor,anddebuggingintime,all haveimportant meaningto themotorandtheproductionsystemses.By wayofenergy intime,accuratedebuggingandtransactionfault,havetovsthefamiliarfaultprogress ofthesynchromotor indetailanalytical!
1— Familiarfault
1。
1—The synchromotorafterswitching on electricitytheincapabilitystarts
The synchromotorafterstartingtheincapabilityrun—timegenerallyhas thereasonofseveralsasfollows:
(1)Powersupplyvoltageoverlow.Becauseatthesquareof voltage, the startingtorque directproportion of synchromotor'sthevoltageofpowersupply overmake low thestartingtorqueofsynchromotorsignificantly thedroop islower thanloadtroque, cannot startthusandwanttoraisevsthispowersupplyvoltageto enlarge thestartingtorqueofdynamo.
(2)Thefault ofmotor。
Checkmotor settle,therotor windinghadnoshort circuit,opencirctui,opensolderingandlinkbadetc.fault,these thefaults will makethedynamo cannotstartto createstartingofratingofintensityofmagneticfield,makethusthedynamocannotstart;Checkingthe motorbearinghasalreadyhadnofailure,theportcap hashave noloose,ifbearing failureportshroudloose,resultinbearing's downsinking,mutually rub with statoriron core,result inthusdynamo'scanning notstart,vssettletherotorfault can beshakentablewiththelow tension,gradually clicktocheck toseekafaultconditionandadopt homologoustreatment;Thecountersgaft acceptsand carriestoshroudaloose condition andallwantsapancarbeforedrivingeach time andseesmotorrotorwhetherslewingis vivid, ifbearingorshaftkiowattdamageandreplaceintime.
(3)The controldevice breaksdown.Thiskindoffaults aremostlythe d.c.output voltageof thewindingsofLimagneticbelttoadjustnot appropriateor don’t output,resultin thestator current of motorover big,causethemotorconductelectricity therun makeorthelosing ofdynamomagneticbeltrun—time.ShouldcheckwhetheroutputvoltagecurrentanditswaveformthattheLi magneticbeltequipsis normalat thistime,theRongbreaks whetherthemachineRong breaks, thecontactis bad;Whethercircuitboardplug-inputsprisonor alignment;Checkloopresistance,putoutwhethercrystal gatetube ofmagnet burnsout or brokesthrough。
(4)Mechanicaltrouble。
Suchas bedraggedalong adynamic machinerytoblock, resultinmotorincapability'sstarting,therotorthatmoves motorin responsetothepanatthistimeseeswhetherthe slewing isvivid,machineryburdenwhetherexistencefault
1.2— Thesynchro motorincapabilityleadslongintosynchronization.
Synchromotorincommonuselawofnonsynchronousstarting,throwin Li magneticbeltwhen themotorrotorrevolvingspeedhitssynchronous revolvingspeedof95%, makeitleads longintosynchronization.Thesynchromotor incapabilityleads longinto synchronousreasonasfollows:
(1)TheLimagnetic belt windingshortcircuit.Becausethewinding of Limagneticbelt,existence short circuitbreaks down,asa resultmakesmotorabletostabilizerun-timebutincapabilityandleadlong intosynchronization whilebeinglower thansynchronousrevolvingspeed.Checktoseekthe Limagneticbelt windingshortcircuit,canopenintolow- tension(aboutthe30 Vs)intherotorderivationon— line,putonthe magneticpolessurfacewith ahandwork steelsaw, pursueinspectionmagneticpoles,ifvibratingisviolent,explainthe magneticpolesto havenoshortcircuit on steel sawofthemagneticpoles'surface,ifthevibratingof sawblademicroordon’t flap, explainthemagnetic polesshortcircuit.Afterunloadingthe magneticpoles,checkthe fault toclick, is short—circuit degree,adopt localto mend orre-roundtomake.
(2)Powersupplyvoltageoverlow。
Powersupplyvoltageoverlow,resultin thestrongLi link ofthedeviceofLimagneticbeltincapability working, makethe motorincapabilityleadlonginto synchronizationthus,theconcreteway istoraisepowersupplyvoltageappropriately.
(3)Thefaultof Limagnetic belt device。
Suchas throwLi overspeedy(namely throw in Limagneticbelt,motorrotorrevolvingspeedoverlow),willmakethe motor cannotleadlongintosynchronization,shouldchecktothrow iftheLilinkexistsfaultatthistime。
IfLimagnetic beltdevicefault,the output’scurrentis lowerthan arating value,causetheelectricitymagnetictroqueofdynamooversmall butcannotlead longintosynchronization,at thistimeinresponsetoscrutinyLimagnetic belt deviceofthrowLilink andphase-shiftinglink,waveform useoscillographto check tothrowLilinkandphase -shiftinglink, shouldalsocheckand putoutmagneticbeltlinkandputoutcrystalgate ofmagneticbeltwhethertubediscoversaquestionasusual,handle intime,if theincapabilityhandles intime, bywayoftheenergyquicklyrestorecapacity, shouldreplace toprovide for use circuitboard.
1。
3-Brushandcompresstightlyspringand gathertogiveorgetanelectric shockring fault.
Thebrush leadsshortandcompresses tightlyspringpressscarcityandmakebrushandgather togive orgetanelectricshockring ofindirectlytouchbadly,thusgeneratesparkorarcelectric,arcelectric orspark toontheother handandeasilyspark shortcircuit,willmakearcelectricburn ontheother handshorter, sparkopencirctuithus,resultinLi magneticbeltdeviceonly the Li magnetoelectricitypressbuthave noLi magnetoelectricitystreaming;Compress tightlyspringageinglapse,makebrushandgathertogive orget an electricshockringofindirectlytouchbadly,effectthestarting ofmotorthus;Gathertogiveorgetanelectricshocka ringsurfaceto there isgreasestainand scaror slotscar,willmakebrushand gathertogiveorgetanelectricshockringofindirectlytouchbadly, generatespark, sparkfurther burn gathertogiveorgetanelectricshock ring,will alsomakegnd short-circuit,thesparkeffects the startingofmotorthus.Forgather togiveorgetanelectricshockringsuperficialgreasestain,canwipe tocleanwiththe acetone;Forthintrace, usemanyfettle shaggingringsof sandpaperssurface,is ringsurface roughnesstohit R1。
6 ums, ifthe slot scarobviouslyneeds togetonthe carbed transform,truning,enteramount ofknifetotakeeverytime1mmas proper,inthe1-1.5ms/s,thetruningspeedcontrol'sroughness hits ofthe umsof R1。
5-1。
8 and becomes badanti to finallypolishwiththesandpaper2-3times overthe0.05mms。
1.4—The damperwindingbreaksdown.
Thedamper winding ofsynchro motorrotor is providedforsynchromotorstartingtouseandwipe—out run— timeat the sametimeamidsparkbecauseofloading to changeofoutof steposc.Startthedamperwindingintheprocess toincisethemagneticfieldofstatorrevolutionbutinducedverybigstarting currentin the synchro motor, so thebigcurrentbyallmeanswill resultindamping hairthermalexpansion,underthe normalconditionbecauseofstartingtimeshort, thedamper windingstartingis behindsoonwillcooloff, butblockuprevolution inthemotor,lackphase,startthesuper —in time to lengthways wait acondition down, ifdon'tshutdownintime,willresultinthedampingtakeoffsolderingto splitetc。
condition.The damperwindingisweaker linkinthe synchromotorparts,thedamper windingfamiliarfault has:
The dampingtakesoffsoldering andsplit,the dampingring dischargeswildfire,dampingring thestrainis serious.These faultswilleffectthe startingofsynchromotor.The dampingtakes off solderingandchoosessilveractiniumwelding rodandadopts oxyacetyleneweldingtoweld,thedynamoaftertakingoutthecore heats into rotor200Celsius degrees set rotorverticalin the oven,aftertakingoutandadopt750Celsiusdegrees toorsoly weld temperature,damping and theblindsideofofdampingringcompletesolderingsarefull,cleara solderingdirt again,;For splitofthedamping,afterdismantlingoriginal damping,choosethematerialof materialhomology andadopttheabove-mentionedmethod toweldafter packinggooddamping。
Dampingringthewildfireis mainlywhatdampingringindirectlytouches bad orgetintouch withareaisn'tenoughto result in. Damping ring thestrainseriouslyismainlyadamping tofixanticoincidencein theslot,thedampingplugsintodampingring whileweldingholefalsely,appearadditional stressafterwelding,atplusdamping ringintensity notenough to, treatmentislooseopenallconnectivityboltsofdamping rings, vsstrain antibigofdampingring,afteroxyacetylene weldingheatingadjustwiththeexclusiveuse fixtureeven, vsstrainseriousreplacea new damping ofring。
2 —Thesolid instanceis analytical
Solidinstance1asynchromotoradopt nonsynchronousstartinglaw,investLimagnetoelectricitystreamingpost -buthardleadlongintosynchronization.
Aim atthe above—mentionedcondition,halt after,checkfirstwhetherpowersupplyvoltage isnormal, then makeuse ofmultimeterandoscillographvstheLimagnetic beltdevice scrutiny,theLi magnetoelectricitypresses,whethercurrent isnormal,endisdoubt ashort-circuitofthewindingof Limagneticbeltto,.Press thepreceding paragraphsthemethodforgiving, canopenintolow —tensionintherotor