变频器与PLC的参考论文

攀枝花学院本科毕业设计（论文）双恒压无塔供水控制系统学生姓名：青涛学生学号：200910503075院（系）：电气信息工程学院年级专业：2009级自动化指导教师：陶文英副教授助理指导教师：二〇一三年六月攀枝花学院本科毕业设计（论文）摘要I摘要该毕业设计对环保、节能、自动补压型给水设备作了介绍。从节能科技的实践出发，阐述了双恒压无塔供水系统在给高楼供水设备中的应用。以PLC电路控制方式，介绍了智能水压控制系统的工作原理及PLC控制系统。在分析水压控制的工作流程的基础上，给出了PLC控制系统的硬件和软件设计。智能水压控制系统的基本控制策略是：采用电动机调速装置与可编程控制器（PLC）构成控制系统，进行优化控制，完成供水压力的恒定控制，当管网流量变化来达到稳定的供水压力和节约电能。系统的控制目标是总泵的出口压力、系统设定的压力值和反馈给水压力实际值进行了比较。处理后的差值输入逆变器，发出控制指令，控制泵电动机的投运台数和运行变量泵电动机的转速，从而达到给水总管压力稳定在设定的压力值上。关键词：PLC控制器，压力传感器，变频器PID运算，双恒压供水。攀枝花学院本科毕业设计（论文）ABSTRACTIIABSTRACTThegraduationdesignofenvironmentalprotection,energysaving,automatictypepressurefeedwaterequipmentareintroduced.Startingfromthepracticeofenergysavingtechnology,andexpoundsthedoubleconstantpressurenotowerwatersupplysystemforhigh-risebuildingswatersupplyequipmentapplication.CircuitwithPLCcontrolmethod,thispaperintroducestheworkingprincipleofhydrauliccontrolsystemandPLCintelligentcontrolsystem.Onthebasisofanalyzingtheworkingprocessofthehydrauliccontrol,PLCcontrolsystemhardwareandsoftwaredesignaregiven.Intelligenthydraulicpressurecontrolsystemofthebasiccontrolstrategyis:USESmotordrivedeviceandaprogrammablecontroller(PLC)controlsystem,optimizationcontrol,completewaterpressureconstantcontrol,whenthenetworktrafficvariationtoachievestablewatersupplypressureandsavepower.Controlobjectivesofthesystemisalwayspumpoutletpressure,systempressuresetvalueandfeedbackfeedpressurecomparestheactualvalues.Aftertreatmentthedifferencebetweentheinputinverter,sendsoutcontrolinstructions,controlstationsandpumpmotorwasputintooperationofvariablepumpmotorspeed,soastoachievestablewatersupplymainpipepressureonthesetpressurevalue.KeywordsPLCcontroller,pressuresensors,inverterPIDarithmetic,thedoubleconstantpressurewatersupply.攀枝花学院本科毕业设计（论文）目录III目录摘要...............................................................................................................................IABSTRACT...................................................................................................................II1绪论..............................................................................................................................11.1选题的意义和背景..........................................................................................................11.2双恒压供水系统简介...................................................................................................11.3本文的主要内容............................................................................................................22恒压供水的基本构成..................................................................................................32.1总体概述..........................................................................................................................32.2设计内容..........................................................................................................................32.3控制要求..........................................................................................................................32.4变频恒压控制理论模型..................................................................................................43变频器与压力传感器的选型......................................................................................53.1变频器的介绍..................................................................................................................53.2变频器的基本结构..........................................................................................................53.3变频器的分类和工作原理..............................................................................................73.4变频器的操作方法和使用..............................................................................................83.5变频器的选型..................................................................................................................83.5.1变频器的控制方式..................................................................................................83.5.2变频器容量的选择..................................................................................................83.6压力传感器....................................................................................................................104PID控制.....................................................................................................................124.1PID控制原理.................................................................................................................124.2PID控制器的选取.........................................................................................................134.3电气系统控制原理图....................................................................................................145硬件设计....................................................................................................................155.1PLC控制器的概述........................................................................................................155.2PLC型号的选择............................................................................................................155.3PLC的CPU选择.....................