摘要本论文是基于PLC，对三相异步电动机实现控制，并且，通过PLC连接变频器，实现变频器对于电机的频率以及正反转的控制，并且通过组态王动画演示。通过PLC的可编程控制，也就是梯形图，实现了一些对于电机的运转的控制。比如，点动控制与连续控制，开关延迟控制，以及正转与反转的循环控制。通过对变频器的设置，并且通过将梯形图写入变频器中，便可以实现通过操控按钮，达到控制电机运转速度以及正转与反转。通过这样方便快捷的控制，可以方便的操控电机的运转，在现实生活中具有很大的意义，因为三相异步电动机在生活与生产的过程中应用极为广泛，能够实现简单并且便于修改的控制，可以将生产的效率大为提高。同时，通过组态王，将操纵电机的情况进行动画的演示，做到形象生动，观察电脑频幕即可了解电机的运行状态，方便的同时具有很大的现实意义，操作人员可以从嘈杂的生产车间环境中解脱出来，更为高效且便捷的监视并且控制现场机器的运转情况，造福了人类社会，是生产进步的体现。25849
关键词  PLC    三相异步电动机   可编程控制   梯形图  组态王
毕业论文设计说明书外文摘要
Title    Design of AC motor speed control system based on PLC                    
Abstract
This thesis is based on PLC, of three-phase asynchronous motor to realize control and PLC through connecting the converter, inverter to achieve for the frequency of the motor and positive inversion of control and by Kingview animation demo. Through the programmable control of PLC, it is the ladder diagram, some of the motor operation control. For example, the control of point motion and continuous control, the control of switch delay, and the control of the cycle of the forward and reverse rotation.. Through the setting of the inverter, and through the ladder diagram written in the inverter, you can achieve through the control button to achieve control motor running speed and forward and reverse. By so fast and convenient control, easy to control motor operation, in real life has great significance, because the three-phase asynchronous motor in the process of life and production application is extremely extensive, to achieve a simple and easy to be controlled and modified, the production efficiency is greatly improved. At the same time, through the Kingview will manipulate the motor animation demo, so vivid, observation frequency computer screen can understand the motor running state, convenience is of great practical significance, operators can from noisy workshop environment solutions emerge, more efficient and convenient monitoring and control the functioning of the machine site, for the benefit of mankind society is reflected in the production progress.
Keywords   PLC  Three-phase asynchronous motor  Programmable control   Ladder diagram    Kingview
目   次
1    绪论 1
1.1  研究背景1
1.2  本文内容1
2   实现平台电路板以及仪器的介绍 3
2.1  台达DVP-PLC 3
2.2  变频器 4
2.3  开关电源 5
2.4  接触器 6
2.5  三相异步电动机 7
2.6  激光光源转速表 8
2.7  电路板安排与接线 9
  3    变频调速系统 10
3.1  实现PLC与变频器通讯时需要的准备工作10
3.2  用MODRW指令来实现PLC对于变频器的通讯的控制14
3.3  激光光源转速表测速15
4   异步电动机PLC控制 17
4.1  三相异步电机正反转的PLC控制17
4.2  通过PLC梯形图编程实现对于电机的控制 17 基于PLC的交流电机调速系统设计+梯形图:http://www.751com.cn/zidonghua/lunwen_19819.html