论文编号:ZD018 字数:17592,页数:47 价格:100元
摘 要
本文介绍了国内电机故障诊断系统设计,以及存在问题,同时介绍了可编程控制器的工作原理,选型依据。设计了一种基于PLC电机故障诊断系统设计,详细介绍了所选用的西门子S7-200 PLC以及同类型的S7-300 S7-400PLC,根据设计要求对PLC的输入输出I/O进行了分配,并且编写系统运行的梯形图。准备开机时,按下开机按钮后,首先检测断路器状态,如果断路器初始状态为闭合,电机无法启动,并且声光报警。如果断路器初始状态为断开,断路器合闸,电机开始启动。在启动过程中,若发生一级故障,PLC进行相应的保护动作。启动完成后,“电机开/关指示灯”亮,电机正常运行。运行过程中,PLC依次循环检测电机是否发生相间短路、断相、低电压、单相接地、过负荷、过电流等故障,若有发生,PLC进行相应保护动作。关机时,PLC接到关机命令后,断路器跳闸,“电机开/关机指示灯”灭。故障声光报警后,按“报警复位按钮”复位。本设计的选题就是基于PLC的电机故障诊断系统设计。
关键词:故障诊断,PLC,电机
Abstract
This paper introduces the domestic electrical fault diagnosis system design, as well as existing problems, and introduced a programmable controller at the same time the working principle of selection basis. A PLC-based design of the electrical fault diagnosis system design, detail on the choice of Siemens S7-200 PLC and the same type of S7-300 S7-400PLC, according to the design requirements of the input and output of the PLC I / O for distribution, and preparation of the ladder diagram system operation. Prepared to boot, press the button after boot, the first detection circuit breaker status, if the initial state for closed circuit breakers, electrical not start, and sound and light alarm. If the circuit breaker to disconnect the initial state, the circuit breaker reclosing, the electrical start. Start in the process, if a failure occurred, the protection PLC corresponding action. Start after the completion of "motor on / off indicator light"-liang, the electrical normal operation. Running process, PLC followed by motor cycle test whether there has been a phase short circuit, breaking phase, low-voltage, single-phase - to-ground, overload, over-current fault, and so, if occurred, PLC protection action accordingly. Shutdown, PLC received shutdown orders, tripping circuit breakers, "Motor on / off indicator light" eliminate. Fault sound and light alarm at the "Alarm reset button" reset. This choice is based on the design of the motor PLC fault diagnosis system design.
Key words: Fault Diagnosis, PLC, Motor
目录
摘要 2
Abstract.. 3
目录 4
任务书. 5
第1章绪论 . .13
1.1 PLC的应用以及选题的意义 .13
1.2 PLC应用于故障诊断系统的发展现状..13
1.3故障诊断方法..13
第2章 PLC原理介绍及设备总体结构介绍 .15
2.1 PLC发展历程 15
2.2 PLC 控制系统的发展前景 ..15
2.3可编程序控制器PLC的分类 ..16
2.4 CPU的构成 18
2.4.1 CPU的构成 19
2.4.2 I/O模块 ..19
2.4.3 电源模块..20
2.4.4 PLC系统的其它设备..20
2.5 PLC的选型方法..21
2.5.1 输入输出(I/O)点数的估算22
2.5.2 存储器容量的估算 ..22
2.6 机型的选择 .22
2.6.1 PLC的类型.23
2.6.2 输入输出模块的选择 23
2.6.3 电源的选择 ..23
2.6.4 存储器的选择.24
第3章 电机故障诊断系统设计以及PLC的选取.24
3.1 PLC的选取及介绍 ..25
第4章 电机故障诊断系统设计33
4.1电机故障等级分类 33
4.2 PLC程序设计 .35
4.2.1.故障点的记录 .35
4.2.2. 多次故障事件的记录 37
4.2.3. 模拟量故障的诊断38
4.2.4. 各种故障信息的串行通信 ..38
4.3借鉴专家系统故障诊断方法的实.38
4.3.1. 专家系统方法.39
4.3.2. 对象类型与推理节点 40
4.3.3. 故障节点的检测方式.40
4.3.4.各节点的注释段要有相应帮助信息..41
第5章 系统电源设计.42
5.1 供电电源 43
第6章结论.. 44
参考文献. 45
致谢. . 47