PLC控制电机变频调速试验系统的硬件设计与实现摘要变频调速是一种有效的节能技术，节能率非常高，几乎能够由于设计冗余量改变浪费和节约能源；由于其高速度、高精度、高功率因数能够提高产品的质量，生产能力，和同时降低材料和设备的消耗，也能降低机械磨损和噪音改善车间的工作环境，满足生产工艺要求。本文首先介绍了基本的硬件和使用西门子S7-300PLC的硬件描述和伦茨变频器的使用方法8200。此外，还介绍了STEP7编程软件的使用方法。然后介绍了变频调速的原理和方法，结合实验设计、原理、方法和实验设计图，介绍了硬件连接的设计、PLC输入输出节点的分布、模数转换方法的设计和系统调试程序。关键词：变频调速、PLC、变频器、模拟量数字量转换AbstractFrequencyisaneffectiveenergysavingtechnologies,energy-savingrateofitsveryhigh,almosttodesignchangesintheamountofredundancyandwasteofallenergysavings;alsobecauseofitsspeedandhighprecision,highpowerfactorcharacteristics,theuseofitcanimproveproductquality,yield,andreducethelossofmaterialsandequipment,butalsocanreducethemechanicalwearandnoise,improvetheworkingenvironmentworkshoptomeettherequirementsofproductiontechnology.ThispaperfirstintroducestheSiemensS7-300PLChardwareandhowtousethebasicsituation,Lenze8200Inverterandhowtousehardwaredescription.Step7alsointroducedtheuseofprogrammingsoftware.AndthenintroducedtheprincipleandmethodofVVVF,combinedwiththeexperimentaldesign,introducedtheideaofthedesignandexperimentaldesigndiagramoftheprincipleofconnectingthehardware,thedistributionofPLCinputandoutputnodes,thedesignofanalogdigitalconversionmethod,andthenprogramming,debuggingthesystem.Keywords：FrequencyControl、PLCFrequencyConverterAnalogdigitalconverter目录摘要..........................................................................................................................................IAbstract..............................................................................................................................................II第一章前言..........................................................................................................................11.1变频调速的背景及发展方向...........................................................................................11.2变频调速的现实意义.......................................................................................................21.3毕业设计的主要内容.......................................................................................................2第二章西门子可编程控制器S7-300...........................................................................................42.1PLC介绍..........................................................................................................................42.1.1PLC的工作原理及工作过程...............................................................................42.1.2PLC的优点...........................................................................................................52.1.3PLC的应用领域...................................................................................................62.2西门子S7-300介绍...........................................................................................................82.2.1电源模块..................................................................................................................82.2.2数字量模拟量输入输出模板.............................................................................
