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安徽工贸职业技术学院毕业设计（论文）

PLC控制三相异步电动机正反转设计

Plc control with a three wire asynchronous motor is inverting

design

摘要 本论文文设计了三相异步电动机的PLC控制电路，就是三相异步电动机的正反转控制，与传统的继电器控制相比，具有控制速度快、可靠性高、灵活性强等优点。非常实用。三相异步电动机的应用非常广泛，具有机构简单，效率高，控制方便，运行可靠，易于维修成本低的有点，几乎涵盖了工农业生产和人类生活的各个领域,在这些应用领域中,三相异步电动机运行的环境不同，所以造成其故障的发生也很频繁，所以要正确合理的利用它。本文研究的这个系统的控制是采用PLC的编程语言----梯形图,梯形语言是在可编程控制器中的应用最广的语言，因为它在继电器的基础上加进了许多功能，使用灵活的指令，使逻辑关系清晰直观，编程容易，可读性强，所实现的功能也大大超过传统的继电器控制电路，可编程控制器是一种数字运算操作的电子系统，它是专为在恶劣工业环境下应用而设计，它采用可编程序的存储器，用来在内部存储执行逻辑运算，顺序控制，定时，计数和算术等操作的指令，并采用数字式，模拟式的输入和输出，控制各种的机械或生产过程。

关键词：PLC 三相异步电动机 可编程控制 梯形图

安徽工贸职业技术学院毕业设计（论文）

Plc control with a three wire asynchronous motor is inverting design

Abstract This paper designed the three-phase asynchronous motor PLC control circuit, is a three-phase asynchronous motor positive inversion control, compared with the traditional relay control, with high speed, high reliability, flexibility and other

advantages. Very practical. The three-phase asynchronous motor is widely used, has the advantages of simple mechanism, high efficiency, easy control, reliable operation, easy to repair and low cost a little, almost covers the industrial and agricultural production and all aspects of human life, in these applications, three-phase asynchronous motor running in different environments, so the fault occurrence is also very frequently, so a correct and reasonable use of it. This paper studies the system control is the use of PLC programming language - ladder, ladder language is in the programmable controller in the most widely used language, because it is in the relay is added on the basis of the many functions, the use of flexible instruction, so that the logic relationship of a clear and intuitive, easy programming, readability is strong, the realization of the functions it considerably exceeds the traditional relay control circuit, the programmable controller is a digital electronic computing operating system, it is designed for use in harsh industrial application environment and design, it uses a programmable memory, used in the internal memory to perform logic operations, sequence control, timing, counting and arithmetic operations such as instruction, and the use of digital, analog input and output, the

安徽工贸职业技术学院毕业设计（论文）

control of various mechanical or production process.

Keyword PLC Three-phase asynchronous motor Programmable control Ladder

目 录

引 言 ...................................................... 1 第一章 三相异步电动机基础 ................................... 2 1.1 三相异步电动机的基本结构 ............................... 2 1.1.1 三相异步电动机定子 .................................. 2 1.1.2三相异步电动机转子 .................................. 3 1.2三相异步电动机的工作原理 ............................... 3 1.3 三相异步电动机的正反转工作过程 ........................ 4 1.3.1 三相异步电动机的原理 ................................ 4 1.3.2 三相异步电动机的制动 ............................... 4 第二章 PLC基础的知识 ....................................... 5 2.1 关于PLC的定义 ........................................ 5 2.2 PLC与继电器控制的区别 ................................. 5 2.3 PLC的工作原理 .......................................... 6 第三章 三相异步电动机的PLC控制 ............................. 8