南京工程学院继续教育学院江苏电力职工大学毕业设计说明书(论文)作者：学号：辅导站：专业：题目：指导者：杨其俊2008年1月【摘要】随着社会生产力的发展和人们物质文化生活水平的提高，社会对产品的需求内容，需求范围，需求水平也随之变化，这个趋势是客观的，必然的。昔日人们眼中的“奢侈品”正逐渐成为生活必需品。在科技发展的现在，可编程序控制器在自动化领域得到了广泛的运用，实现PLC与上位计算机的通信是控制过程的技术关键。变频器技术广泛用于冶金、机床、制冷、起重、电梯等行业，变频器对交流对电机进行调速，它包括了电机与拖动，电机调速原理。本文介绍了电机转动所需的电能很大程度上被浪费，需要从根本上解决这个问题，必须采用电机调速，经过调速的电机能根据用户的需要随时改变---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---转速值，而不是随着负载的变化而变化，通过变频方法能实现交流电机的无级调速。随后对PLC控制程序进行分析，最后给出实例。【关键词】：电机调速、变频器、PLC、【Abstract】Alongwiththesocialproductiveforcesdevelopmentandthepeoplematterculturelivingstandardenhancement,thesocietytotheproductdemand,thedemandscope,thedemandlevelalsoalongwithitchange,thistendencyisobjective,inevitable.Informerdaysinthepeopleeye"theluxurygoods"graduallywerebecomingthedailynecessity.Inthetechnicaldevelopmentpresent,theprogrammableforewordcontrollerobtainedthewidespreadutilizationintheautomateddomain,realizesPLCandonthepositioncomputercorrespondenceisthecontrolledprocesstechnicalkey.Thefrequencychangertechnologywidelyusesinthemetallurgy,theenginebed,therefrigeration,isheavy,professionandsoonelevator,thefrequencychangertoexchangescarriesonthevelocitymodulationtotheelectricalmachinery,itincludedtheelectricalmac---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---hinerywithtodrive,electricalmachineryvelocitymodulationprinciple.Thisarticleintroducedtheelectricalmachineryrotationneedsintheelectricalenergyverygreatdegreeiswasted,needsfundamentallytosolvethisproblem,mustusetheelectricalmachineryvelocitymodulation,needstochangetherotationalspeedvalueasnecessaryafterthevelocitymodulationelectricityfunctionaccordingtotheuser,butisnotchangesalongwiththeloadchange,canrealizethealternatingcurrentmachinesteplessspeedregulationthroughthefrequencyconversionmethod.AfterwardscarriesontheanalysistothePLCcontrolprocedure,finallyproducestheexample.【Keyword】：Electricalmachineryvelocitymodulation、Frequencychanger、PLC、目录摘要Abstract前言·······················································1---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---第1章教学仿真龙门刨床的工作原理···················31.1龙门刨床控制系统的组成·····························31.2龙门刨床的基本原理··································61.2.1龙门刨床主拖动系统的运动特点··················61.2.2刨台运动的机械特性曲线······················71.2.3对电动机机械特性的要求······················71.2.4变频调速机械特性····························71.2.5采用变频调速的刨台运动控制··················71.3龙门刨的调整试车····································81.3.1试车前的准备··································91.3.2...