PLC空压机组集散控制系统设计+梯形图
摘要依据PLC与变频器实现的系统的自动控制，通过对空压机原本的传统电气控制进行改造来实现PLC对空压机的自动控制。本设计能适用于大量使用空压机的煤矿工业。本设计能够在很大程度上提高自动化程度，提高工业生产的效率，还能起到节约资源和保护环境的作用。本设计以PLC和变频器控制作为核心，通过对传感器的传递信号进行处理来开启变频器对电动机的转速的控制来改变空压机的进气排气效率，从而使供气管道的气压达到平衡稳定的程度。在本设计的软件部分，设计了包括集散控制系统的简图和调速系统的原理图，还有PID的控制原理及PID公式。在硬件上，对于PLC、变频器和传感器的不同需求分别选择了比较符合的类型来进行搭配。还有主电路的设计图以及集散控制系统的总的连接图。PLC和变频器的集散控制系统能实现逻辑控制、层次按序控制、定时器功能和进行相关计数等多种功能。69185
毕业论文关键词：空气压缩机 变频器 PLC（可编程控制器）
The Design of The Control System of Air-compressor with PLC
Abstract
Based on PLC with inverter to achieve automatic control system. With the air compressor transforming the traditional electrical control to achieve automatic control by PLC. This design can be applied to large-scale use of air compressor in coal industry. This design can improve the degree of automation in large part ,and improve the efficiency of industrial production, conserve a large number of resources and can also play a role in protecting the environment. This design make the control of PLC and inverter as a core. By processing the passing sensor signal to make the inverter controlling drive motor speed to change the intake and exhaust efficiency in compressor. So that the pressure in pipeline get a degree of stability. In the software part of the design,including schematic diagram of the control system and the speed control system,there also have PID control theory and PID formula.In the hardware part,for the different needs of PLC,inveter and sensor,selecting some types that to be in more line with. There are also main circuit design and a control system diagram of the overall connection.The control of PLC and inveter can make logic control, sequence control various functions, timing and counting come ture.
Key words: Air Compressor PLC Inverter
目 录
摘要 I
Abstract II
目 录 III
1 绪论 1
1.1 设计的研究背景 1
1.2 研究目的和意义 1
1.3 相关文献的综述 1
1.4 本文的研究重点与组织思路 3
2 系统方案分析与选择论证 5
2.1 空气压缩机选择方案 5
2.2 PLC的选择方案 6
2.3 变频器的选择方案 7
2.4 传感器的选择方案 7
2.5 系统的最终方案 7
3 系统方案的硬件设计 8
3.1 PLC的简介 8
3.2 集散控制系统组成 11
3.3 集散控制系统的工作原理 12
3.4 PLC的通信与报警装置 17
3.5 系统硬件设计