基于PLC和变频器控制交流调速控制系统.doc

哈尔滨工业大学工学硕士学位论文 哈尔滨理工大学学士学位论文 - PAGE II - -  PAGE III - 基于PLC与变频器的交流电机调速控制系统 摘要 随着电力电子技术、计算机技术、自动控制技术的迅速发展，交流调速取代直流调速已成为现代电气传动的主要发展方向。通用变频器以及可编程控制器以其优越的调速和其保停性能、高效率、高功率因数和显著的节电效果而广泛应用于大、中型交流电机等，被公认为最有发展前途的调速控制。本课题就是针对交流电机的发展方向而设计的基于PLC和变频器对交流电机调速控制系统。 本文首先介绍了交流调速系统的发展概况、使用领域，以及交流调速系统的国内外研究现状。由于PROFIBUS是一种不依赖生产厂家的开放式现场总线标准，不同厂商所生产的设备不需对其接口进行特别调整就可通信，目前它已广泛应用于加工制造、过程和建筑自动化，并且被认为是当今运行最快的现场总线。所以本文针对PROFIBUS总线的工作原理和特点，探讨了通用变频器MM系列变频器在调速系统中的应用情况，并分析了PROFIBUS-DP网络的拓扑结构，系统中主站和从站的建立，变频器GSD文件的导入，MPI网络设置，PLC对变频器控制的程序设计，最后给出了总线系统中控制字（PQW）和状态字（PIW）的数据格式。从而最终达到通过PLC和变频器对交流电机调速的目的。 关键词:通用变频器；可编程控制器；PROFIBUS现场总线；交流电动机 The Control System Basing On AC Cage Induction Ajusts Abstract Along with the electric power electronics, the technique of calculator, automatic control technical and quick deveolp, the alternating current, AC adjusts to replace soon the direct current adjusts soon one of the main development direction of having become the modern electric drives, in general use frequency converter with its tempered superiorly to rises soon braking function, high-efficiency and high power factor and show the knot battery effect of the extensive application in strong and medium-sized cage induction motor, squirrelcage induction motor that breeze machine etc., it drive generally accepted for have most the development prospect adjust soon controller. This issue is to the direction of development of AC motor designed for PLC and inverter-based AC motor control system. This paper first ntroduced the general situation of AC variable frequency speedsregulating system,the domain which used,and the study situation.The PROFIBUS is a kind of open type field bus standard that do not depend on the production plant house, differing the factory an equipment for producing do not need as to its special regulation in progress in interface can correspond by letter, current it is already extensive to applied in process the production, process to automate with building, and pass for to circulate the