基于PLC变频调速控制系统的实验设计

论文编号:ZD895    论文字数:12516,页数:48

摘  要

 变频调速是一项有效的节能降耗技术，其节电率很高，几乎能将因设计冗余和用量变化而浪费的电能全部节省下来；又由于其具有调速精度高、功率因数高等特点，使用它可以提高产品质量、产量，并降低物料和设备的损耗，同时也能减少机械磨损和噪音，改善车间工作环境，满足生产工艺要求。
 本文首先介绍西门子S7-300 PLC的硬件基本情况及使用方法，Lenze 8200变频器的硬件说明及使用方法。此外还介绍下Step7编程软件的使用方法。然后介绍变频调速原理及方法，结合本次实验设计的要求，介绍下设计的思路框图及实验设计的原理，连接硬件，分配PLC的输入输出结点，设计模拟量数字量的转化方法，再编写程序，进行系统的调试。

关键词：变频调速、PLC、变频器、模拟量数字量转换

Abstract
Frequency is an effective energy saving technologies, energy-saving rate of its very high, almost to design changes in the amount of redundancy and waste of all energy savings; also because of its speed and high precision, high power factor characteristics, the use of it can improve product quality, yield, and reduce the loss of materials and equipment, but also can reduce the mechanical wear and noise, improve the working environment workshop to meet the requirements of production technology.
This paper first introduces the Siemens S7-300 PLC hardware and how to use the basic situation, Lenze 8200 Inverter and how to use hardware description. Step7 also introduced the use of programming software. And then introduced the principle and method of VVVF, combined with the experimental design, introduced the idea of the design and experimental design diagram of the principle of connecting the hardware, the distribution of PLC input and output nodes, the design of analog digital conversion method, and then programming, debugging the system.
 
Keywords：Frequency Control、PLC  Frequency Converter  Analog digital converter

目 录
摘要……………………………………………………………………………. . .……………….I
1前言……………………………………………………………………………………... ... ......1
1.1  变频调速的背景及发展方向…………………………………………..….……………1
1.2  变频调速的现实意义…………………………………………..….……………………2
1.3  毕业设计的主要内容…………………………………………………. ………. .…….2
2  西门子可编程控制器S7-300………………………………………………..............4
 2.1  PLC介绍……………………………………………………………..………………...4
  2.1.1  PLC的工作原理及工作过程. ………………………………..………………..4
 2.1.2  PLC的优点……………………………………………………………………..6
  2.1.3  PLC的应用领域………………………………………………………………..7
 2.2  西门子S7-300介绍…………………………………………………………………....8
  2.2.1  电源模块………………………………………………………………………...8
  2.2.2  数字量模拟量输入输出模板………………………………………………..….9
3  Lenze变频器…………………………………………………………………………….....10
 3.1  变频器介绍………………………………………………………………………….…10
    3.2  变频器使用注意事项……………………………………………………………….…10
 3.3  Lenze 8200 vector变频器……………………………………………………………...11
4  系统设计……………………………………………………. . .……………………………16
 4.1  系统分析………………………………………………………………………………16
 4.2  硬件设计………………………………………………………………………………17
4.3  软件设计………………………………………………………………………………19
4.4  分析比较………………………………………………………………………………25
5  系统的调试………………………………………………………………………………....26
 5.1  硬件调试…………………………………………………………………………….…26
 5.2  软件模拟监控……………………………………………………………………….…27
6  总结……………………………………………………………………………………….….30
致谢…………………………………………………………………………………………….....31
参考文献………………………………………………………………………………..……..…32
附录1  实验指导书……………………………………….………………………………….....33
附录2  系统参考程序………………….........................................36