六層電梯PLC控制系統(tǒng)設(shè)計(jì),六層電梯PLC控制系統(tǒng)設(shè)計(jì),電梯,plc,控制系統(tǒng),設(shè)計(jì) 5 5 PLCharcteristicRecived:30March204/Aceptd:5July204/Publishedonlie:30March205Springer-VerlagLondonLim ted205 PLCEnglishfull tileProgram m ble LogicController,Chinesefulltileastheprogram m blelogicalcontroller,thedefinitionis:Onekindofdigitaloperationoperations elctronicsytem ,fordesignsspecialyintheindustryenvironmentapplication.Itusesakindofprogram m blem em ory,usesinitsinternalystoredprogram ,theactuatinglogicoperation,thesequential control,fixedtim e, countingandarithmeticoperationandsoonfaceusersinstruction,andthroughdigitaleithersim ulationtypeinput/outputcontroleachtypem achineryor productionproces.1Reliabiltyishigh,antijammingabilty. Dependingonthenatureistheelctricontrolequipments esntialperform ance. BecausePLCusesthem odernlargescaleintegratedciruitechnology,usedthestricttechniqueofproductionm anufacture,theinternalciruithas adoptedtheadvancedantijam m ingtechnology,hadtheveryhighreliability.Forexam pletheMitsubishiCorporationproducesFserisPLm eantim ebetwenfailurereachesashighasfor 300,000hours.SomeuseredundancyCPUPLCaveragetrouble-freoperatingtim eislonger.FromthePLCoutsidetheaircaftelctricircuit,usesthePLCconstiutioncontrolsytem ,compares withthesam elevelscalefollowingtheelctricalpick-offsytem ,theelctricalwirngandtheswitchontactreducedtoseveralhundredsevenseveralthousands1,thebreakdownalsogreatlyreduces. Inaddition,PLChasthehardwarefaultself-m easuringability,presntswhenthebreakdownm aysendoutthearninginform ationpromptly.Intheapplicationsoftware,theapplicationm ayalsoenroll theperipherycomponentsbreakdownfromthediagnosticprogram ,causesinthesytem alsoobtainsthebreakdown 6 6 besidesthePLCelctricircuitandtheequipm entfrom thediagnosiprotection.Thus,theoveralsytem hastheextrem lyhighreliabilityalsonottofelstrange. 2Necsarycomplet,thefunctionisperfct,eserviceable.PLCdevelopstoday,hadalreadyform edthelarge,m ediumandsm al eachscalesrializedproduct.Mayuseineachscaletheindustrialcontrolsituation.Besidesthelogicalprocesingfunction,m odernPLCm ostlyhastheconsumm ationdataoperationability, m ayuseineachkindofnumericalcontroldomain.InrecntyearsthePLCfunctionunitem rgedm asively,causesPLCtosepthepositoncontrol,thetem peraturecontrol,CNandsoon eachindustrialcontrol.InadditionthePLCtraficapacitysenhancem ntandthem an-m achinecontactsurfacetechnologysdevelopment,usesPLCtocomposeeachkindofcontrolsytem becomesveryeasy.3Easytostudyeasilytouse,thedepthiswelcometheengiersandtechnicans. PLCtakesthegeneralindustrialcontrolcomputer,isfacesIndustrialndm iningestablishmentslabortocontrol theequipment.Itsconnectioniseasy,theprogram m inglanguageaceptseasyfortheengineersandtechnicians.Thetrapezoidalchartlanguagesgraphicssym bolandtheturnofexpresionand therelayciruitdiagram isquiteclose,onlyusesPLCthefewsitchquantitylogicalcontrolinstructiontobepossibletorealizetherelayelctricircuitsfunctionconveniently.Fornotthe fam ilarelctronicciruit,didnotunderstandthecomputerprincipleandtheasem blylanguagepersonusesthecomputertobeengagedintheindustrialcontroltoopengateoftheconvenience. The4Systemsdesign,theconstructionworkloadaresmall,maintainconvenietly,easytotransfor. PLCreplacesthewirnglogicwiththestoredlogic,reducedthecontroldevicexteriorwirnggreatly,causescontrolsytem designandtheconstructioncyleisthereduction greatly,sim ultaneouslym aintainsalsobecomeseasy.Causestheidenticalequipmentpossiblytobecomem oreim portantlyafterthealterprocedurechangeproductionproces.Thisvery suitablem ulti-varietis, sm al batchproductionsituation.The5Volumeismall,theweightislight,thenergyconsuptionislow. 7 7 TakesubminiaturePLCastheexam ple,recntlyproducedthevarietybasesizeism alerthan100mm , theweightism alerthan150g,thepowerlossonlycountsthetile.Becausethe volumesm alveryeasytoloadinthem achinery,realizestheintegrationofm achineryidealcontroldevice.Sincelong,PLCisintheindustrialutomationcontroldomainthroughoutthem ain batlefild,hasprovidedtheveryreliablecontrolapplicationforvariousautomationcontroldevice.Itcanprovidesafereliableandthequiteperfectsolutionfortheautomated controlapplication,suitsinthecurrentIndustrialentrprisetotheautomatedneed.Sincethe1980s,asresultofthecomputer technologyandm icroelectronictechnologysrapidly expand,theenorm ousim petusPLCdevelopment,thePLCfunctionwhichcausedstrengtheneddaybyday.IfPLCm aycaryonthesim ulationquantitycontrol,thepositoncontrolandthePID controlandsoon,easytorealizetheflexiblem anufacturesytem . Thelong-distancecorrespondencefunctionrealizescausePLCevnm orepowerful.Atpresnt,intheadvancedcountries, PLChasbecometheindustrialcontrolthestandardequipment,hascoveredalIndustrialentrprisenearlyusingthesurface.PLCisonekindofsolidstae elctronicinstaltion,itusestheprocedurewhichstorestocontrolm achinesm ovem entorthecraftworkingprocedure.PLCisusesfortosubstiutefortraditionaltheblack-white control,compareswithit,PLCism oreoutstandingthanitheperform ancetheblack-whitecontrollogic,thereliabilityispecialyhigh,thedesignconstructioncyleishort,thedebuggingrevise, m oreoverthevolumetobesm alconveniently,thepowerlossilow,theusem aintenanceisconvenient.Therefore,thisarticlehastudiedbasedontheprogram m blecontroller(PLC) elctricm otorsynthesim onitoringandprotectivesytem sm ethod.Makestheelctricm otorm ovem entthethre-phaseasynchronousm achine. Becausethethre-phaseasynchronousm otorrotors rotationalspeedislowerthantherotaryfieldtherotationalspeed,therotorwindinghastherelativem otionwiththem agneticfield,buttheinducedem fandtheelctriccurrent,andhavethe elctromagnetism torquewiththem agneticfieldinteraction,realizestheenergyevolution.Compareswiththesingle-phaseasynchronousm otor,thethre-phaseasynchronousm otor perform ancecharacteristicisgood,andm aysaveeachm aterial.Thecrookedsubstructuresdifernce,thethre-phaseasynchronousm otorm aydivideintothe 8 8 cagetypeandwindthreadthetypetwokinds.Thecagetyperotorsasynchronousm otorstructureisim ple,them ovem entisreliable,theweightislight,thepricewascheap,obtainedthe widespreadapplication,itsm ajorobjectasthevelocitym odulationdificulty.Theregulatingrheostaresitancem ayim proveelctricm otorsstartingabilityandadjustelctricm otorsrotational speed.Thethre-phaseasynchronousm otorwilchangethevoltagenottochangetherotationalspeed,comm onlyusedchangesthenumberofpolepairs.Changesthethre-phasepowersources frequency.Changesliding,abovetwocomm onvelocitym odulationm ethod.Thechangenumberofpolepairsneedstolookthatheelctricalm chineryiswhetrappropriate,ifinwerdiodes elctricalm achinerycannotchange,afteranotherwasthechange,itsoutputcorrespondinglyilalsochange,wasnotthesteplschange.Thechangeslidingusescopespeaksthedot,only uses,incomparesthehigheficencytowindthreadontheelctricalm chinery,thesm alelctricalm achinerysrotordoesnotwindthread,changedtherotorinducedem fthefrequencytochange elctricm otorsrotationalspeed.Moreoverthesim plethem eansarechangeintotheelctricm otortheslipperydiferncelectricalm chinery, m ightthesteplsspeedregulation,becauseinthevelocitym odulationproces,theelctricalm achineryrotationalspeedwasinvariable,likethisoutputtherotationalspeedtobepossible tom ovehasnotafectdverylowlytotheelctricalm chinery.