摘 要
自二十世纪六十年代美国推出可编程逻辑操控器（Programmable Logic Controller。随着计算机技术、信号处理技术、操控技术网络技术的不断发展和用户需求的不断提高,PLC得到了快速发展,PLC在开关量处理的基础上增加了模拟量处理和运动操控等功能。
关键词：PLC 电机 调速系统 通信 变频调速操控系统
PLC control AC motor speed regulation system Design and Implementation
Abstract
Since the sixties the twentieth century the United States launched a programmable logic controller (Programmable Logic Controller, PLC) has replaced the traditional relay control device, PLC has been rapid development, is widely used around the world. Meanwhile, PLC function is also improved. With computer technology, signal processing technology, control technology and network technology for the continuous development of rising user demand, PLC basis of the switch rate treatments to treat volumes added to the simulation and motion control functions. PLC today no longer limited to logic control, motion control, process control and other fields also play an important role.
PLC has a simple structure, easy programming, superior performance, flexible and versatile, easy to use, high reliability and ability to wait out a series of interference with the advantages of automation in industrial production process has been widely applied. Therefore, the master PLC technology is the transformation of traditional production techniques and equipment, important way. Meanwhile, industrial production, all process, the movement is always necessary, exercise the majority of the electrical power source, so the motor speed has become the focus of our study, widely used today in the PLC will naturally think of PLC in the motor speed effect, this paper, frequency control system, a PLC-based Implementation of fuzzy control strategy. First of all, PLC-based fuzzy control of frequency control system design, and then focus for IPC and PLC and the communication between PLC and inverter programming. Then discusses the principle and structure of the fuzzy controller, and research and design a motor speed fuzzy controller. SIEMENS PLC-based fuzzy control strategy of the project implementation, and gives a key part of the program. This paper studied frequency control system bridge crane, crane motor speed can be adjusted to achieve, and to adapt production to meet energy needs. This system uses PLC PLC fuzzy control retains the reliable, flexible, adaptable and so on, and also enhance the level of intelligent control systems and systems of static and dynamic characteristics. Simulation results show that this system can achieve precise control of motor speed, practical, has a potential market value.
Key words：Motor Speed Control System Communicate
Frequency Control System
主要研究内容
结合变频调速系统,PLC）取代传统继电器操控装置以来,PLC的功能也不断完善。仿真结果表明,利用STEP 7一micro／win32对模糊操控算法进行编程实现
3．将模糊操控系统进行仿真,具有一定的推广价值。同时,在PLC广泛应用的今天,因此电机的调速也成为我们的重点研究对象,可以实现起重机电机速度的调节,又提高了操控系统的智能化程度和系统的静动态特性。所以,在工业生产的各个过程中,在世界各地得到了广泛应用。
PLC具有结构简单、编程方便、性能优越、灵活通用、使用方便、可靠性高、搞干扰能力强等到一系列优点,在工业生产过程自动操控领域得到了广泛应用。
目 录 30000字
摘 要 1
第 1章 绪论 4
1.1 PLC的发展前景 4
1.2起重机的发展状况和研究趋势 5
1.3传统桥式起重机操控系统的特点及存在的问题 7
1.4起重机调速技术的发展现状 8
1.5模糊操控理论概况 10
1.6本论文的研究意义及主要内容 11
第2章 频调速操控技术的基本原理 13
2.1交流电机变频调速技术 13
2.2变频器 16
2．2．1变频器的类型 16
2．2．2变频器的基本结构 17
2．2．3变频器的主电路 17
2．2．4变频器的操控电路 18
2．3现代变频调速的操控方式 18
2．4变频调速与传统串电阻调速效果比较 19
第3章 变频调速系统的总体设计 22
3.1桥式起重机系统简介 22
3.2 系统总体方案设计 22
3.3 系统部件的选择 24
3．4系统的通信程序设计 25
3．4．1 PLC与上位机之间的通信 25
3．4．2 PLC通信程序框图 28
第4章 系统模糊操控器的设计 33
4．1模糊操控理论 33
4．1．1模糊操控的基本思想 33
4．1．2模糊操控特点 34
4．2模糊操控系统的组成 35
4．3模糊操控器的组成 36
4．4电机转速模糊操控器的设计 37
4．4．1确定模糊操控器的输入变量和输出变量 38
4．4．2输入、输出变量的论域及参数的确定 38
第5章 模糊操控变频调速系统的实现及仿真 43
5．1 PLC的基本结构和工作原理 43
5.1.1 PLC的基本结构 43
5.1.2 PLC的工作原理 45
5．2 PLC操控系统的整体设计 46
5．3模糊操控的PLC实现 47
5．4模糊操控变频调速系统的仿真 48
第6章 总结与展望 51
参考文献 53
致 谢 54