基于plc雙電源開(kāi)關(guān)設(shè)計(jì)外文翻譯

1、<p>　　畢業(yè)設(shè)計(jì)（外文翻譯）</p><p>　　英文題目 Based on PLC dual power switch design </p><p>　　中文題目 基于PLC雙電源開(kāi)關(guān)設(shè)計(jì) </p><p>　　系 （院） 自動(dòng)化系

2、 </p><p>　　專(zhuān) 業(yè) 電氣自動(dòng)化技術(shù) </p><p>　　學(xué)生姓名 曹成帥 李廣斌 孫鳳寶 </p><p>　　學(xué) 號(hào) 20009022384，2009022410，2009022427,200

3、9022390 </p><p>　　指導(dǎo)教師 張寶國(guó) </p><p>　　職 稱(chēng) 副教授 </p><p><b>　　年 月 日</b></p>&l

4、t;p>　　Intelligent double power</p><p>　　1 Intelligent dual power supply switching technology</p><p>　　In this paper, the double load - dual power automatic switching of PLC control, PLC contr

5、ol program to replace relay logic control circuits, it has the three-phase power supply phase detection and protection switching function, power returned to normal after the automatic reverse switch, when a fault and res

6、tore normal respectively sends out two difference clear alarm and prompt sound. Double load - dual power automatic switching control of PLC, the open-phase protection mainly adopts the techni</p><p>　　2 Inte

7、lligent dual power supplies switching main circuit control</p><p>　　With short phase protection double load - dual power automatic switching control circuit. It includes a main circuit and three-phase short

8、signal detecting sampling circuit. The main circuit of the input power supply power supply U1 and U2, its output has two loads W1 and W2. Power main circuit of AC contactor U1 through KM1 main contacts and a load of W1 c

9、onnected; power supply U2 main circuit through the AC contactor KM2 main contacts and a load of W2 connected; under the control of a control </p><p>　　For three-phase power U1 A, B phase and C phase lack de

10、tection, the use of an intermediate relay KA1, KA2 and KA3, respectively connected to power the U1 main circuit A, B phase and C phase and zero line N constitute a single-phase circuit, the formation of A1, B1 and C1 pha

11、se detection circuit. The normally open contact of KA1 ~ KA3 as U1 three-phase.</p><p>　　Phase lack detection switch sampling signal, to the PLC input terminal, used in the preparation of PLC U1 three-phase

12、 open-phase detection logic control program input conditions; similarly, the three-phase power supply U2 A, B phase and C phase lack detection, but also the use of an intermediate relay KA4, KA5 and KA6, respectively co

13、nnected to power the U2 main circuit A2, B2 phase and C2 phase and zero line N constitute a single-phase circuit, the formation of A2, B2 and C2 three-phase open-p</p><p>　　3 With PLC intelligent dual power

14、control</p><p>　　The three-phase open-phase detection signal sampling circuit, as U1 and U2 three-phase open-phase detection switch sampling signals of KA1-KA3 and KA4-KA6, the normally open contacts respect

15、ively for the input of the PLC X0-X2, X3-X5. In the PLC ladder diagram program, auxiliary relay R1 as the three-phase power supply of U1 three-phase open-phase detection, which is normally open input conditions for X0, X

16、1 and X2" and" logic; similarly, internal intermediate relay R2 as the three-phase power s</p><p>　　In automatic switching control process, PLC ladder diagram procedure of auxiliary relay R1 and R2

17、 respectively controlled AC contactor KM1 ( Y0 ) and KM2 ( Y1 ) coil and electric state, directly reflects two three-phase power supply U1 and U2 respectively the total phase condition, namely, either U1 or U2 three-phas

18、e power supply phase, KM1 ( Y0 ) or KM2 ( Y1 ) will immediately loses electricity, the normally closed contact of the alternating current contactor closed KM3 ( Y2 ) control coil gets</p><p>　　The control ci

19、rcuit adopts electric whistle (or buzzer) as an alarm sound (at) the same time with the red signal (at the same time with the red signal lamp), and returned to normal when the bell HA as prompt sound. Can produce two dis

20、tinct alarms and prompt sound effects.</p><p><b>　　智能雙電源</b></p><p>　　1 智能雙電源切換的技術(shù)方案</p><p>　　本文所述的雙負(fù)載—雙電源自動(dòng)切換的PLC控制,用PLC控制程序取代繼電器邏輯控制電路,其具有對(duì)三相供電電源的缺相檢測(cè)及保護(hù)切換功能,在電源恢復(fù)正常后能

21、自動(dòng)進(jìn)行反切換,當(dāng)發(fā)生故障和恢復(fù)正常時(shí)能分別發(fā)出兩種區(qū)別明顯的報(bào)警和提示音響。 雙負(fù)載—雙電源自動(dòng)切換的PLC控制,其缺相保護(hù)主要采取的技術(shù)方案是:設(shè)置有三相缺相檢測(cè)信號(hào)回路,該三相缺相檢測(cè)信號(hào)回路直接取自于三相電源的主回路,即用中間繼電器KA1-KA3和KA4-KA6,分別接于電源主回路U1和U2的A相、 B相和C相單相回路中,KA1-KA3和KA4-KA6的常開(kāi)觸點(diǎn)分別作為PLC的輸入信號(hào),即作為編制PLC的U1和U2三相缺相檢測(cè)邏

22、輯控制程序時(shí)的輸入條件。具有缺相保護(hù)的雙負(fù)載—雙電源自動(dòng)切換控制,不僅具有缺相保護(hù),同時(shí)還具有短路和過(guò)載保護(hù)、 失壓保護(hù)等功能;能自動(dòng)進(jìn)行缺相檢測(cè)、 三相電流顯示,某一路供電電源發(fā)生故障時(shí)能自動(dòng)切換到另一路電源繼續(xù)對(duì)負(fù)載供電,并發(fā)出聲光報(bào)警;在電源恢復(fù)正常后能自動(dòng)進(jìn)行反切換;在發(fā)生故障和恢復(fù)正常時(shí)能分別發(fā)出兩種區(qū)別明顯的報(bào)警和提示音響效果。 它克服了現(xiàn)有中低檔雙電源切換控制系統(tǒng)的沒(méi)有缺相保護(hù),不能自動(dòng)進(jìn)行反</p><

23、;p>　　2 智能雙電源切換的主電路控制</p><p>　　具有缺相保護(hù)的雙負(fù)載—雙電源自動(dòng)切換控制電路。 其中包括主回路和三相缺相檢測(cè)采樣信號(hào)回路。 主回路的輸入有兩路供電電源U1和U2,其輸出有兩路負(fù)載W1和W2。 電源U1主回路通過(guò)交流接觸器KM1的主觸點(diǎn)閉合與其負(fù)載W1相聯(lián)接;電源U2主回路通過(guò)交流接觸器KM2的主觸點(diǎn)閉合與其負(fù)載W2相聯(lián)接;在控制電路的控制下,某一電源發(fā)生故障時(shí),其交流接觸器先失

24、電斷開(kāi),使其負(fù)載脫離故障電源回路,通過(guò)交流接觸器KM3的主觸點(diǎn)閉合導(dǎo)通聯(lián)絡(luò)回路,將接于故障回路的負(fù)載自動(dòng)切換到另一正常電源繼續(xù)供電。 電源U1和U2主回路輸入端的自動(dòng)開(kāi)關(guān)QF1和QF2的主要作用是過(guò)載保護(hù)及短路保護(hù);兩路三相電源的主回路中每一相均有電流表指示各相電流的狀況,以配合控制電路的缺相檢測(cè)。 三相缺相檢測(cè)采樣信號(hào)回路,其缺相檢測(cè)信號(hào)直接取自于三相電源的主回路,即用中間繼電器KA1～KA3KA4～KA6分別接于電源主回路U1和U2

25、的A相、 B相和C相的單相回路中,KA1～KA3和KA4～KA6的常開(kāi)觸點(diǎn)分別作為U1和U2的三相缺相檢測(cè)的開(kāi)關(guān)量采樣信號(hào),作用于PLC的輸入端。 考慮到PLC繼電器輸出點(diǎn)的負(fù)載能力,通過(guò)接觸器KM01～KM03</p><p>　　對(duì)于三相電源U1的A相、 B相和C相的缺相檢測(cè),各采用一個(gè)中間繼電器KA1、KA2和KA3,分別接于電源U1主回路的A相、 B相和C相并與零線N構(gòu)成的單相回路,形成A1、 B1和C1

26、三相的缺相檢測(cè)回路。KA1～KA3的常開(kāi)觸點(diǎn)分別作為U1的三相缺相檢測(cè)的開(kāi)關(guān)量采樣信號(hào),作用于PLC的輸入端,作為編制PLC的U1三相缺相檢測(cè)邏輯控制程序時(shí)的輸入條件;同理,對(duì)于三相電源U2的A相、 B相和C相的缺相檢測(cè),也各采用一個(gè)中間繼電器KA4、 KA5和KA6,分別接于電源U2主回路的A2相、 B2相和C2相并與零線N構(gòu)成的單相回路,形成A2、 B2和C2三相的缺相檢測(cè)回路。KA4～KA6的常開(kāi)觸點(diǎn)分別作為U2的三相缺相檢測(cè)的開(kāi)

27、關(guān)量采樣信號(hào),作用于PLC的輸入端,作為編制PLC的U2三相缺相檢測(cè)邏輯控制程序時(shí)的輸入條件。</p><p>　　3 用PLC實(shí)現(xiàn)智能雙電源的控制</p><p>　　三相缺相檢測(cè)采樣信號(hào)回路中,作為U1和U2的三相缺相檢測(cè)的開(kāi)關(guān)量采樣信號(hào)的KA1-KA3和KA4-KA6,其常開(kāi)觸點(diǎn)分別作用于PLC的輸入端的X0-X2,X3-X5。在PLC梯形圖程序中,輔助繼電器R1作為三相電源U1的三

28、相缺相檢測(cè),其接通條件為常開(kāi)輸入X0,X1和X2的 “與” 邏輯;同理,內(nèi)部中間繼電器R2作為三相電源U2的三相缺相檢測(cè),其接通條件為常開(kāi)輸入X3,X4和X5 “與” 邏輯。</p><p>　　在自動(dòng)切換的控制過(guò)程中,PLC梯形圖程序中的輔助繼電器R1和R2分別控制交流接觸器KM1(Y0)和KM2(Y1)線圈的得失電狀態(tài),分別直接反映出兩路三相電源U1和U2各自總的缺相狀況,即任一路三相電源U1或U2發(fā)生缺相時(shí)

29、,KM1(Y0)或KM2(Y1)會(huì)立即失電,其常閉觸點(diǎn)閉合使交流接觸器KM3(Y2)控制線圈得電吸合,通過(guò)KM3的主觸點(diǎn)閉合導(dǎo)通聯(lián)絡(luò)回路,將接于故障回路的負(fù)載W1或W2自動(dòng)切換到另一正常電源U2或U1繼續(xù)供電,從而實(shí)現(xiàn)缺相保護(hù)的自動(dòng)切換。 在自動(dòng)反切換的控制過(guò)程中,輔助繼電器R1和R2的主要作用是:當(dāng)故障排除后,三相電源U1或U2恢復(fù)正常供電時(shí),R1(或R2)得電,其常閉觸點(diǎn)動(dòng)作,R3復(fù)位,切斷KM3(Y2),繼而使KM1(Y0)或KM