基于PLC的电机故障诊断系统设计 - 毕业设计 精品

本科生毕业设计说明书（毕业论文）

题 目：基于 学生姓名： 学 号： 专 业：电气工程及其自动化 班 级：电气 指导教师：

PLC的电机故障诊断系统设计 2

教授

基于PLC的电机故障诊断系统设计

摘要

本文介绍了国内基于PLC的电机故障诊断系统设计，详细分析了三相鼠笼式异步电机常见的故障及故障表现出的症状。对PLC的选型做出了论述，介绍了S7-200 CPU226的特点。对模块的扩展做出了详细论述。对传感器进行相应的选型，对输入输出点做出了相应的分配。做出了一套基于PLC的电机多故障诊断系统。本文对基于PLC的电机故障诊断系统硬软件的设计做出了详细论述，做出了故障诊断系统的工艺图及人机界面，做出了程序流程图及梯形图。

关键字：PLC；电机；故障诊断

I

Motor fault diagnosis system based on PLC is designed

Abstract

This paper introduces the domestic motor fault diagnosis system based on PLC is designed, detailed analysis of the three-phase squirrel-cage asynchronous motor showed symptoms of the common faults and fault. Type selection of PLC made in this paper, the author introduces the characteristics of S7-200 CPU226. Made on the propagation of the module is discussed in detail. To the corresponding selection, sensor made corresponding allocation of input and output point. Make a set of motor fault diagnosis system based on PLC.In this paper, the motor fault diagnosis system based on PLC, the hard software design has made a detail, the fault diagnosis system of the process diagram and the man-machine interface, making the program flow chart and ladder diagram.

The keyword：PLC ; motor fault ; diagnosis

II

目录

摘要................................................................................................................................. I ABSTRACT .................................................................................................................. II 目录.............................................................................................................................. III 绪论................................................................................................................................ 1 第一章 三相鼠笼式异步电机...................................................................................... 3

1.1 鼠笼式异步电机的发展 ................................................................................ 3 1.2 鼠笼式异步电机结构及工作原理 ................................................................ 3

1.2.1 鼠笼式异步电机的类型和基本结构.................................................. 3 1.2.2 鼠笼式异步电机工作原理.................................................................. 5

第二章 可编程控制器.................................................................................................. 7

2.1 PLC简介......................................................................................................... 7 2.2 PLC的组成及内部原理................................................................................. 8 2.3 PLC的发展及现状 ....................................................................................... 11 2.4 PLC的应用 ................................................................................................... 11 第三章 三相鼠笼式异步电机的故障及分析............................................................ 13

3.1 三相鼠笼式异步电机常见故障 .................................................................. 13 3.2 三相鼠笼式异步电机的故障分析............................................................... 15

3.3 数据采集....................................................................................................... 18

3.3.1保护装置的数据采集......................................................................... 18 3.3.2传感器的选型..................................................................................... 18

第四章 可编程控制器系统设计................................................................................ 20

4.1可编程控制器系统设计原则........................................................................ 20

4.1.1可编程控制器的硬件设计原则......................................................... 20 4.1.2可编程控制器的软件设计原则......................................................... 20 4.2可编程控制器系统设计步骤........................................................................ 20 4.3 PLC机型选择及扩展 ................................................................................... 21

III

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