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1、随着科学技术和社会经济的发展，高层建筑已成为现代城市的标志。电梯作为垂直运输工具，承担着大量的人流和物流的输送，其作用在建筑物屮至关重要。与此同时，人们对电梯的性能要求也越来越高，比如可靠性，操作方便，舒适性，低噪音，低能耗等等。随着人们对其要求的提高，屯梯得到了快速发展，其拖动技术已经发展到了调频调压调速，其逻辑控制也由PLC代替原來的继电器控制。采用PLC对电梯进行控制，通过合理的选择和设计，能够有效的提高电梯的控制水平，极大地改善了电梯运行的舒适感,使电梯的控制达到了比较理想的控制效果。本文在介绍电梯基本结构的基础上，阐述了电梯的拖动原理和控制原理，重点
2、分析了电梯系统设计屮如何用PLC实现控制系统并编制控制程序,研究并提出了基于PLC和变频器的电梯控制系统的实现方案,针对这些问题对电梯系统进行了新的设计.设计出了新的采用PLC进行逻辑控制，用变频器调速的电梯控制系统。利用三菱PLCFX2N-64来设计5层电梯控制系统。关键词：电梯；控制系统；PLC；变频器ABSTRACTWithscientificandtechnologicalandsocio-economicdevelopment,high-risebuildingshavebecomethehallmarkofmoderncities.Asvertic
3、alliftequipment,alotofpeoplebearthetransportationandlogistics,itsroleinbuildingessential.Atthesametime,ithastolifttheperformancerequirementsarealsoincreasing,suchasreliability,easytooperate,comfortablenature,lownoise,consumption,andsoon.Buttheelevatorasanimportanttrafficinskyscraper
4、,italsohasdevelopedquicklywiththeimprovingrequirementofthePeople.IFsdraggingtechnologyhasdevelopedfromDCtimingtoACvariablefrequencytimingandIt，slogiccontrol-relaycontrolalsohasbeenreplacedbyPLC・usingPLCtocontroltheelevator,thereliabilityisimprovedandthefeelingofcomfort15betterthroug
5、hthereasonableselectionanddesign,sotheeffectofcontrolismoreideal.Inordertomeetthecomfort,improvetransportingefficiencyandreachtherightfloor,thegivencurveofanelevatorisakeypoint.Mostofpeople'ssensitivityonchangingspeedisaboutaccelerationmovement.Comfortmeansaccelerationanddeceleratio
6、nonsmoothness.Toacquirefavorablecomfort,thestartingandbrakingcurvesdesignoftheelevatoriscomposedoftwos-curvesandonebeeline.Throughadjustingtheaccelerationtimeandthatofthes-curve^s,idealstartingandbrakingcurvesaregained.Thispaper,basedontheintroductionoftheelevator^basicstructure,exp
7、atiatesthedriveandcontrolprincipleofelevator,andanalyzeshowtousethePLCtoprogramcontrollingprocess.Theimplementationprojectofelevator'sVVVFcontrolsystembasedonPLCandtransducerisstudiedandproposed.Thisarticlewaspreciselyhascarriedontheimprovementdesigninviewofthesequestionstotheexisti
8、ngelevatorsystem.Us
