目录
摘要 .......................................................................................................................................................................I
Abstract: .............................................................................................................................................................II
第 1 章 绪论 ........................................................................................................................................................3
1.1 引言 .......................................................................................................................................................3
1.2 系统设计的来源 ...................................................................................................................................3
1.3 系统设计的要求 ...................................................................................................................................3
1.4 电动机智能软启动控制设计的研究背景............................................................................................3
1.5 PLC 控制的电动机启动系统的发展与现状........................................................................................4
1.5.1 国外发展现状 ............................................................................................................................4
1.5.2 国内发展现状 ............................................................................................................................4
1.6 课题研究设计的目的和意义.................................................................................................................4
第 2 章 电动机的启动 ........................................................................................................................................6
2.1 电动机启动的发展 ...............................................................................................................................6
2.2 定子串电阻降压启动 ............................................................................................................................6
2.3 Y-△转换启动.........................................................................................................................................6
2.4 自耦降压启动 ........................................................................................................................................7
2.5.1 软启动器原理 ............................................................................................................................8
2.5.2 软启动器的控制功能.................................................................................................................8
第 3 章 变频器 ....................................................................................................................................................9
3.1 变频器概述 ...........................................................................................................................................9
3.2 变频器的基本构造 ...............................................................................................................................9
3.3 变频器与软启动器的比较....................................................................................................................9
3.4 变频器的特点 .....................................................................................................................................10
第 4 章 可编程控制器 ......................................................................................................................................11
4.1 PLC 的概述..........................................................................................................................................11
4.2 PLC 的基本构成 ..................................................................................................................................11
4.3 PLC 的编程与调试 ..............................................................................................................................11
4.4 PLC 的工作过程 ..................................................................................................................................12
第 5 章 设备选型 ..............................................................................................................................................13
5.1 电动机的选择与参数 .........................................................................................................................13
5.2 PLC 选型及参数 ...............................................................................................................................13
5.3 变频器的选型及参数 .........................................................................................................................13
5.4 其他元器件 .........................................................................................................................................14
5.5 变频器拖动多台电机方案 ..................................................................................................................15
第 6 章 系统设计方案 ......................................................................................................................................16
6.1 PLC 程序编写 ......................................................................................................................................16
6.1.1 程序编写思路 ...........................................................................................................................16
6.1.2 程序梯形图 .............................................................................................................................16
6.2 控制系统 I/O 点与功能 .......................................................................................................................16
6.3 系统功能简介 .....................................................................................................................................17
6.5 变频器参数设置 .................................................................................................................................18
6.6 系统电路图及控制流程图..................................................................................................................18
6.6.1 系统电路图 ..............................................................................................................................18
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