PLC在矿井提升机变频调速中的应用毕业论文(含开题报告和中期答辩)

本科毕业设计（论文）PLC在矿井提升机变频调速中的应用2011年6月本科毕业设计（论文）PLC在矿井提升机变频调速中的应用摘要Ⅰ摘要矿井提升机是矿山最重要的设备，肩负着矿石、物料、人员等的运输责任。传统的矿井提升机控制系统主要采用继电器-接触器进行控制，这类提升机通常在电动机转子回路中串接附加电阻进行启动和调速。这种控制系统存在可靠性差、操作复杂、故障率高、电能浪费大、效率低等缺点。针对这种情况采用PLC与变频器相结合的控制方案对原有电控系统进行改造，提高整个电控系统安全可靠性、控制精度及调速性能。因此，对矿井提升机控制系统进行研究具有现实意义，也是国内外相关行业专家学者的一个热门研究课题。本文把可编程序控制器和变频器应用于提升机控制系统上，并在可行性方面进行了较深入的研究。事实表明，采用该控制系统，使提升机工作可靠，使用方便，同时具有动态显示的功能，节能效果明显。关键词：矿井提升机；变频调速；矢量控制；PLC；AbstractⅡAbstractTheshafthoististheforemostequipmentofmines，itiswidelyusedtotransportthematerials，staffandequipment.Thetraditionalshafthoistcontrolsystemisalwayscontrolledbytherelay-contactor，andadoptsthemethodsofconnectseriesadditionalresistantinrotorswindinglooptostartandadjustspeed.Thesystemhasmanydisadvantagessuchasbadreliability，complicatedoperation，highfaultrate，largeenergy–wastingandlowefficiency.Accordingtothiskindofcondition,weadoptPLCandTransducertoreformfororiginalcontrolsystem,soastoraisethesafety,reliability,speedregulationperformanceofthewholeelectriccontrolledsystem.So,carryingontheresearchontheshafthoistcontrolsystemhasrealisticmeanings，anditisasubjectforresearchbyrelevantexpertsandscholars，bothathomeandabroad.Tothesequestionsexistingintheshafthoistcontro1system，thepaperappliedPLC(ProgrammableLogicController)andfrequencyconvertertothesystem,andcarriedondeeperresearchinfeasibility.Thefactindicates，adoptingcontrolsystem，theshafthoistworksreliably，easytouse，energy-savingwell，andhavedynamicalshownfunction.Keywords：Shafthoist；Frequencyconversion；Vectorcontrol；PLC目录摘要.....................................................................................................................IAbstract................................................................................................................II第1章绪论........................................................................................................11.1课题概述..............................................................................................11.2课题来源..............................................................................................11.3国内外提升机研究状况......................................................................21.4本文内容及研究意义..........................................................................51.4.1研究内容..........................................51.4.2研究意义..........................................6第2章提升机的工况分析................................................................................92.1提升系统简介......................................................................................92.2提升机电动机运行方式......................................................................92.3提升机的速度图和力图....................................................................102.3.1提升机的速度图...................................102.3.2力图.............................................112.4矿井提升机对电气控制系统的要求................................................12本章小结....................................................................................................15第3章可编程控制器简介..............................................................................173.1PLC的基本特点.................................................................................173.2PLC的基本结构.................................................................................193.3PLC的工作原理.................................................................................203.4PLC的分类.........................................................................................213.5PLC编程.............................................................................................233.5.1PLC执行用户程序的过程............................233.5.2梯形图的表示.....................................243.5.3梯形图的编程规则.................................25本章小结....................................................................................................25第4章：矢量控制变频调速............................................................................274.1变频调速的发展及在提升机系统中的应用......................................274.2变频调速基本原理..............................................................................294.3变频调速控制方式分类......................................................................324.4变频器按中间直流环节方式分类.....................................................334.5变频调速技术的发展现状..................................................................34本章小结.....................................................................................................35第5章总体设计方案.......................................................................................375.1系统控制要求.....................................................................................375.2选择机型.............................................................................................375.3控制系统的I/0点................................................................................385.4系统控制结构......................................................................................385.4.1系统主电路图......................................385.4.2系统控制电路图....................................395.4.3系统外围接线图..................