基于PLC的電機(jī)故障診斷系統(tǒng)設(shè)計(jì)

電氣自動(dòng)化論文編號:ZD018         字?jǐn)?shù):17592,頁數(shù):47

目錄

摘要 2
Abstract 3
目錄  4
任務(wù)書 ...... 5
第1章緒論  .13
1.1 PLC的應(yīng)用以及選題的意義  13
1.2  PLC應(yīng)用于故障診斷系統(tǒng)的發(fā)展現(xiàn)狀 13
1.3故障診斷方法 13
第2章  PLC原理介紹及設(shè)備總體結(jié)構(gòu)介紹  15
2.1  PLC發(fā)展歷程  15
2.2 PLC 控制系統(tǒng)的發(fā)展前景  15
2.3可編程序控制器PLC的分類  16
2.4 CPU的構(gòu)成  18
2.4.1  CPU的構(gòu)成  19
2.4.2  I/O模塊  19
2.4.3  電源模塊 20
2.4.4  PLC系統(tǒng)的其它設(shè)備 20
2.5  PLC的選型方法 21
2.5.1  輸入輸出（I/O）點(diǎn)數(shù)的估算 22
2.5.2  存儲器容量的估算  22
2.6  機(jī)型的選擇  22
2.6.1  PLC的類型 23
2.6.2  輸入輸出模塊的選擇  23
2.6.3  電源的選擇  23
2.6.4  存儲器的選擇 24
第3章  電機(jī)故障診斷系統(tǒng)設(shè)計(jì)以及PLC的選取 24
3.1  PLC的選取及介紹  25
第4章 電機(jī)故障診斷系統(tǒng)設(shè)計(jì) 33
4.1電機(jī)故障等級分類  33
4.2 PLC程序設(shè)計(jì)  35
4.2.1.故障點(diǎn)的記錄  35
4.2.2. 多次故障事件的記錄  37
4.2.3. 模擬量故障的診斷 38
4.2.4. 各種故障信息的串行通信  38
4.3借鑒專家系統(tǒng)故障診斷方法的實(shí) 38
4.3.1. 專家系統(tǒng)方法 39
4.3.2. 對象類型與推理節(jié)點(diǎn)  40
4.3.3. 故障節(jié)點(diǎn)的檢測方式 40
4.3.4.各節(jié)點(diǎn)的注釋段要有相應(yīng)幫助信息 41
第5章  系統(tǒng)電源設(shè)計(jì) 42
5.1  供電電源 43
第6章結(jié)論 44
參考文獻(xiàn)  45
致謝  47

摘 要
本文介紹了國內(nèi)電機(jī)故障診斷系統(tǒng)設(shè)計(jì)，以及存在問題，同時(shí)介紹了可編程控制器的工作原理，選型依據(jù)。設(shè)計(jì)了一種基于PLC電機(jī)故障診斷系統(tǒng)設(shè)計(jì)，詳細(xì)介紹了所選用的西門子S7-200 PLC以及同類型的S7-300 S7-400PLC，根據(jù)設(shè)計(jì)要求對PLC的輸入輸出I/O進(jìn)行了分配，并且編寫系統(tǒng)運(yùn)行的梯形圖。準(zhǔn)備開機(jī)時(shí)，按下開機(jī)按鈕后，首先檢測斷路器狀態(tài)，如果斷路器初始狀態(tài)為閉合，電機(jī)無法啟動(dòng)，并且聲光報(bào)警。如果斷路器初始狀態(tài)為斷開，斷路器合閘，電機(jī)開始啟動(dòng)。在啟動(dòng)過程中，若發(fā)生一級故障，PLC進(jìn)行相應(yīng)的保護(hù)動(dòng)作。啟動(dòng)完成后，“電機(jī)開/關(guān)指示燈”亮，電機(jī)正常運(yùn)行。運(yùn)行過程中，PLC依次循環(huán)檢測電機(jī)是否發(fā)生相間短路、斷相、低電壓、單相接地、過負(fù)荷、過電流等故障，若有發(fā)生，PLC進(jìn)行相應(yīng)保護(hù)動(dòng)作。關(guān)機(jī)時(shí)，PLC接到關(guān)機(jī)命令后，斷路器跳閘，“電機(jī)開/關(guān)機(jī)指示燈”滅。故障聲光報(bào)警后，按“報(bào)警復(fù)位按鈕”復(fù)位。本設(shè)計(jì)的選題就是基于PLC的電機(jī)故障診斷系統(tǒng)設(shè)計(jì)。

關(guān)鍵詞：故障診斷，PLC，電機(jī)

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