PLC控制下的电梯系统外文翻译.docx

PLC控制下的电梯系统外文翻译.docx

《PLC控制下的电梯系统外文翻译.docx》由会员分享，可在线阅读，更多相关《PLC控制下的电梯系统外文翻译.docx（13页珍藏版）》请在冰豆网上搜索。

PLC控制下的电梯系统外文翻译

外文资料翻译

ElevatorSystemBasedonPLC

Composedbytheorderofrelaycontrolsystemisarealizationofthefirstelevatorcontrolmethod.However,toenterthenineties,withthedevelopmentofscieneeandtechnologyandthewidespreadapplicationofcomputertechnology,thesafetyofelevators,reliabilityoftheincreasinglyhighdemandontherelaycontrolweaknessesarebecomingevident.

Elevatorcontrolsystemrelaysthefailureratehigh,greatlyreducesthereliabilityandsafetyofelevators,andescalatorsstoppedoftentotakewiththestaffabouttheinconvenienceandfear.Andtheeventratherthantakingtheliftorsquatattheendoftheliftwillnotonlycausedamagetomechanicalcomponents,butalsopersonalaccidentmayoccur.

ProgrammableLogicController（PLC）isthefirstorderlogiccontrolinaccordaneewiththeneedsofdevelopedspecificallyforindustrialenvironmentapplicationstooperatetheelectronicdigitalcomputingdevice.Givenitsadvantages,atpresent,therelaycontrolthelifthasbeengraduallyreplacedbyPLCcontrol.Atthesametime,ACvariablefrequencymotorspeedcontroltechnology,thewaytheliftdragspeedhasbeenagradualtransitionfromDCtoACfrequencyconverter.Thus,PLCcontroltechnologyincreasesVVVFElevatormoderntechnologyhasbecomeahotindustry.

1.PLCelevatorcontroladvantages

（1）usedinelevatorcontrolPLC,withsoftwareforautomaticcontrolofliftoperation,reliabilitygreatlyincreased.

（2）layerwasremovedandamajorityoftherelay,thecontrolsystemstructureissimple,tosimplifytheexternalcircuit.

（3）PLCcanbeavarietyofcomplexcontrolsystem,easytoaddorchangecontrolfunctions.

（4）PLCcanbeautomatedfaultdetectionandalarmdisplaytoimprovetheoperationofsecurityandeaseofmaintenance.

（5）forthegroupcontroltheallocationandmanagement,andimprovetheefficiencyofelevatoroperation.

（6）donotneedtochangethecontrolschemechangeswhenthehardwareconnection.

2.VVVFelevatorcontrolcharacteristics

Withthepowerelectronics,microelectronicsandcomputertechnologytocontroltherapiddevelopmentoftechnology,communicationtechnologyVVVFalsoaveryrapidrate.ACvariablefrequencymotorspeedcontroltechnologyisthepowertoimprovetheprocessinordertoimproveproductqualityandimprovingtheenvironmentandpromotingtechnologicalprogressasaprimarymeans.Frequencyofitsexcellentperformaneeandthespeedbrakefromasmoothperformanee,highefficiency,highpowerfactorandpower-savingeffectofabroadscopeofapplicationandmanyotheradvantagesofbeingathomeandabroadrecognizedasthemostpromisingapproachspeedExchangecharacteristicsofVVVFElevator

（1）lowenergyconsumption

（2）lowloadcircuit,therequiredemergencypowersupplydeviceofsmallIntheaccelerationstage,therequiredstart-upcurrentoflessthan2.5timestheratedcurrent.Peakstartingcurrentandtimeisshort.Sincethestartingcurrentisdrasticallyreduced,sopowerconsumptionandpowersupplycablediametercanbereducedalot.Requiredforemergencypowersupplydevicesarealsorelativelysmallsize.

（3）highreliabilityandlongservicelife.

（4）goodcomfort

Elevatoroperationisbesttofollowthespeedcurveofagivenoperation.Theircharacteristicscanbeadaptedtohumanfeelings,andtoensurethatnoiseoperation,smoothbrake

Pinglayerandhighprecision

（5）Stablenoise-free

（6）Inthecar,theengineroomandadjacentareastoensurethatnoise.Becausetheirsystemsuseahighclockfrequency.Alwaysproduceatruesinewavepowersupplycurrentyet.Motortorquerippledoesnotappear.Therefore,toeliminatevibrationandnoise.

3.Elevatorcontroltechnology

Theso-calledelevatorcontroltechnologyreferstotheelevatordrivesystemandelectricalcontrolsystemofautomaticcontrol.70asthe20thcenturyinChina'selevatorwasmarkedbytheexchangeoftwo-speedelevator.Itsspeedisusedtochangetheelevatortractionmotoroftheveryfew,twoormultilevelapproachtothenumberofwindings,veryfewofthemashigh-speedwindingofthewinding,averyfewnumberofwindingsasthelow-speedwinding.Windingsforhigh-speedelevator-speedstart-upandrunning,low-speedwindingsforbrakingandthemaintenanceofelevators.

Theearly80s,VVVFinvertercontrolledvariableliftsystemavailable.ItusesACmotordrives,areabletoreachthelevelofDCmotor,controlthespeedofthecurrenthasreached6m/sec.Itssmallsize,lightweight,highefficiency,energysaving,includingthepastalmostalltheadvantagesofthelift.Isthelatestelevatordrivesystem.

Operationinverticallift,thereisalsothestartingpointoftheterminusstation.

Formorethanthree-storyelevatorbuildings,thestartingpointoftheterminalstationsandstopsbetweenthehadnot,thestartingpointforthesestationsatthefirstflooroftheterminallocatedatthehighestfloor.Startingpointinthefirstfloorofthestationknownasbasestations,knownasthestartingpointatbothendsoftheterminalstationsandstationsatbothendsofintermediatestopsbetweenstations.

Outsidethestationhasacallbox,boxsetareusedbystaffforelevatorcallbuttonortouchthecallbutton,thegeneralendsoftheliftstationsinthecallboxontheSettingsbuttonortouchofabutton.Middlelayerofthestationsetupthecallboxbuttonortouchbutton2.Nodriversforthecontrolofelevators,atvariousstationsaresetupcallsmeonabuttonortouchbutton.Elevatorcarandtheinternalsettings（exceptfordebriselevator）tomanipulateme.Controlboxswitchonthehandleorsetupstationsandthecorrespondinglayerofbuttonsortouch-buttoncontrolboxonthetouch-controlbuttonorcommandbuttonortouchthecitybutton.Outsidethecommandbuttonortouch-buttonissueasthesignaloutsidethecommandsignal,withinthecommandbuttonortouch-buttonissuewithinthesignalasacommandsignal.80Inthemid-20thcentury,thetouchbuttonhasbeenreplacedbymicro-button.

Astheelevatorcallboxoutsidethebasestation,inadditiontosetupacallbuttonortouchbutton,butalsosetakeyswitchinordertoworktheelevatorclearanee.Driversormanagementstafftoopentheelevatortothebasestationcanwrigglethroughadedicatedkeytothekeyswitch.Closetheelevatorinplacetoautomaticallycutofftheelevatorcontrolpowersupplyorpowersupply.

4.PLCControlElevatorDesign

Withthecontinuousdevelopmentofurbanconstruction,theincreasinghigh-risebuildings,elevatorsandlifeinthenationaleconomyhasabroadapplication.Elevatorhigh-risebuildingsasameansoftransportintheverticalrunofdailylifehasbeeninextricablylinkedwithpeople.Infacttheliftisbasedonexternalcallcontrolsignals,aswellasthelawsoftheirown,suchasrunning,andthecallisrandom,theliftisactuallyaman-machineinteractivecontrolsystem,simpletousecontrolorlogiccontrolordercannotmeetthecontrolrequirements,andtherefore,elevatorcontrolsystemusesarandomcontrollogic.Elevatorcontroliscurrentlygenerallyusedintwoways,first,theuseofcomputerasasignalcontrolunit,thecompletionoftheliftsignalacquisition,operationandfunctionoftheset,toachievetheliftandsettheautomaticschedulingfunctiontoruntheelection,dragthecontrolfrominvertertocomplete;thesecondcontrolmodewithprogrammablelogiccontroller（PLC）toreplacethecomputercontrolsignalsetstheelection.Fromthecontrolandperformanee,thesetwotypesofmethodsandthereisnosignificantdifferenee.Mostofthedomesticmanufacturerstochoosethesecondapproach,becausethesmallerscaleofproduction,theirdesignandmanufactureofhighcostofcomputercontroldevices;andPLChighreliability,convenientandflexibleprogramdesign,anti-interfereneeability,stableandreliableoperationofthecharacteristicsofTherefore,theelevatorcontrolsystemisnowwidelyusedtorealizeprogrammablecontroller.

5.Elevatorcontrolsystemcharacteristics

Operationoftheliftcurveisabovethestarttoruncomfortindicatorsliftthekeyfeatures,andcomfortaredirectlyrelatedwiththeacceleration,accordingtocontroltheory,foracertainamountofchangeaccordingtothelawmustbedirectlycontrolled,forelevatorcontrolsystem,accordingtotheidealaccelerationcurveaccelerationfeedbacktobeused,inaccordaneewiththemotortorqueequation:

M-MZ=△M=J（dn/dt）,canbeseenreflectedintherateofchangeofaccelerationofthesystemofdynamictorquechangesonthecontrolsystemtocontroltheaccelerationofthedynamictorque△M=M-MZ.Therefore,duringthistimetocontroltheuseoftheprincipleofacceleration,whenthestartrateofincreaseinsteady-statevalueabove90%,theaccelerationcontrolsystembytheswitchtospeedcontrol,asinparagraphsteadyspeed,speedcontrolfortheconstantfluctuationsinthesmaller,littlechangeinacceleration,speedandtheuseofclosed-loopcontrolcanmaintainasteady-statespeedaccuracyandprecisionforthebrakingsectiontocreate

theconditionspinglayer.Isrisingatarateinthesystem,andalthoughtheabove-speedPIregulatorusedtocontrol,buttwoofthePIparametersaredifferentinordertoimprovethesystemdynamicresponseindicators.Thebrakeinthesystem,thatis,toreducethespeedofcontrolnecessarytoensurethecomfort,butalsostrictlyinaccordancewiththeop