基于PLC电梯控制系统的设计-外文翻译

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1、翻译部分英文原文DesignandPracticeofanElevatorControlSystemBasedonPLCAbstractThispaperdescribesthedevelopmentof2nine-storeyelevatorscontrolsystemforaresidentialbuilding.ThecontrolsystemadoptsPLCascontroller,andusesaparallelconnectiondispatchingrulebasedon"minimumwaitingtime"torun

2、2elevatorsinparallelmode.Thepapergivesthebasicstructure,controlprincipleandrealizationmethodofthePLCcontrolsystemindetail.Italsopresentstheladderdiagramofthekeyaspectsofthesystem.Thesystemhassimpleperipheralcircuitandtheoperationresultshowedthatitenhancedthereliabilityan

3、dperformanceoftheelevators.1.IntroductionWiththedevelopmentofarchitecturetechnology,thebuildingistallerandtallerandelevatorsbecomeimportantverticaltransportationvehiclesinhigh-risebuildings.Theyareresponsibletotransportpassengers,living,workingorvisitinginthebuilding,com

4、fortableandefficientlytotheirdestinations.Sotheelevatorcontrolsystemisessentialinthesmoothandsafeoperationofeachelevator.Ittellstheelevatorinwhatordertostopatfloors,whentoopenorclosethedoorandifthereisasafety-criticalissue.Thetraditionalelectricalcontrolsystemofelevators

5、isarelay-controlledsystem.Ithasthedisadvantagessuchascomplicatedcircuits,highfaultratioandpoordependability;andgreatlyaffectstheelevator’srunningquality.Therefore,entrustedbyanenterprise,wehaveimprovedelectricalcontrolsystemofarelay-controlledelevatorinaresidentialbuildi

6、ngbyusingPLC.Theresultshowedthatthereformedsystemisreliableinoperationandeasyformaintenance.Thispaperintroducesthebasicstructure,controlprincipleandrealizationmethodoftheelevatorPLCcontrolsystemindetail.2.SystemstructureThepurposeoftheelevatorcontrolsystemistomanagemovem

7、entofanelevatorinresponsetouser’srequests.Itismainlycomposedof2parts:2.1.ElectricpowerdrivingsystemTheelectricpowerdrivingsystemincludes:theelevatorcar,thetraction24motor,doormotor,brakemechanismandrelevantswitchcircuits.HereweadoptedanewtypeofLCseriesACcontactorstorepla

8、cetheoldones,andusedPLC’scontactstosubstitutetheplentyofintermediaterelays.Thecircuitsoftractionmotorar