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1、PLC在电梯控制中的应用研究摘要电梯是垂直方向的运输设备,是高层建筑中不可缺少的交通运输设备。它靠电力,拖动一个可以载人或物的轿厢,在建筑的井道内导轨上做垂直升降运动。随着现代城市的发展,高层建筑日益增多,电梯成为人们日常生活必不可少的代步工具。电梯性能的好坏对人们生活的影响越来越显著,因此必须努力提高电梯系统的性能,保证电梯的运行既高效节能又安全可靠。采用PLC对电梯信号系统进行控制,开发出了完整的电梯控制软件,提高了电梯的控制水平,并改善了电梯运行的舒适感,使电梯达到了较为理想的控制效果。而控制电梯运行的PLC系统也要求越来越高,要求达到电梯运行的“稳、准、快”的运行目的。该系统
2、主要由PLC、逻辑控制电路组成。其中包括交流异步电动机、继电器、接触器、行程开关、按钮、发光指示器和变频器组成为一体的控制系统。关键词:电梯、PLC、梯形图TheapplicationofPLCintheelevatorcontrolAbstractAnelevatorisverticaltransportequipment,high-risebuildingistheindispensabletransportationequipment.Itcanbeadragonelectricpower,theenclosuremannedorinthebuilding,wellwithin
3、theguidedoverticalmovement.Withthedevelopmentofmoderncities,anincreasingnumberofhigh-risebuilding,elevatorbecomeanindispensablemeansoftransportofdailylife.Thequalityoftheliftperformanceoftheimpactonpeople'slivesbecomingmoreandmoreobvious,itmuststrivetoimprovetheperformanceofelevatorsystems,ande
4、nsuretheoperationoftheliftissafe,reliableandenergyefficient.TheuseofPLCsignalsontheelevatorcontrolsystem,thedevelopmentofacompleteelevatorcontrolsoftware,toimprovetheleveloftheelevatorcontrolandimprovetheoperationoftheelevatorcomfort,sothatthelifttoreachamoresatisfactorycontroleffect.Andthecont
5、rolelevatorcirculateofthePLCsystemalsohasmoreandmorehighrequest,requesttoattainthemovementpurposeof"steady,quasi-,quick"ofelevatormovement.ThatsystemmainlyfromPLC,logiccontroltheelectriccircuitconstitute.Includeanexchangesdifferencetotreadelectricmotoramongthem,aftertheelectricappliances,getint
6、ouchwithamachine,routeoftravelswitchandpressbutton,giveoutlighttheindicatorconstituteandtransducerforthecontrolsystemofintegralwhole.KEYWORDS:Elevator,PLC,LadderDiagram目 录前言·····················································5第1章绪论··············································61.1电梯继电器控制系统的特点及
7、存在问题·····················61.1.1电梯继电器控制系统的优点························61.1.2电梯继电器控制系统存在的问题····················61.2PLC及其在电梯控制中的应用特点························61.2.1PLC的特点······································61.2.2PLC控制电梯的优点·············