電大機(jī)械本科【機(jī)電控制與可編程控制器技術(shù)設(shè)計(jì)】復(fù)習(xí)題小抄參考

1、設(shè)計(jì)題復(fù)習(xí)：題一、按起動(dòng)按鈕sbi后，一臺(tái)三相交流電動(dòng)機(jī)運(yùn)轉(zhuǎn)10s，停止5s，重復(fù)動(dòng)作3次后停止運(yùn)轉(zhuǎn)；按下急停機(jī)按鈕sb2，電動(dòng)機(jī)停止；過(guò)載時(shí)熱繼電器fr動(dòng)作，電動(dòng)機(jī)停止。按上述工作要求；（1）設(shè)計(jì)電機(jī)控制主回路； 2）選擇plc，設(shè)計(jì)plc控制回路；3）分配io 通道，畫(huà)出梯形圖。1：圖（a）為電機(jī)控制主回路，圖（b為控制回路，圖c為控制梯形圖、選cpm1a10點(diǎn)plc（也可以選其它型號(hào)plc）2： io點(diǎn)分配 啟動(dòng)按鈕sbi 00000 急停按鈕sb2 00001 熱保護(hù)fr 00002 電機(jī)控制接觸器km1 001003梯形圖 如圖（c）題二：由兩臺(tái)三相交流電動(dòng)機(jī)m1、m2。組成的控制系

2、統(tǒng)的工作過(guò)程是；按起動(dòng)按鈕sb1，m1電動(dòng)機(jī)起動(dòng)，過(guò)5秒后m2電動(dòng)機(jī)起動(dòng)，按起動(dòng)按鈕sb2，m2電動(dòng)機(jī)起動(dòng)；按停止按鈕sb3，m1、m2電動(dòng)機(jī)停止；若m2電動(dòng)機(jī)過(guò)載測(cè)兩臺(tái)電動(dòng)機(jī)都應(yīng)停機(jī)，若m1電動(dòng)機(jī)過(guò)載則m1電動(dòng)機(jī)停機(jī)、按上述要求：（1）設(shè)計(jì)電機(jī)控制主回路；（2）選擇 plc，設(shè)計(jì) plc控制回路（3）分配 io通道。畫(huà)出梯形圖。答： （設(shè)計(jì)出電機(jī)控制主回路5分；選plc和設(shè)計(jì)出plc控制回路5分；io點(diǎn)分配5分；設(shè)計(jì)出控制梯形圖5分。） 1圖（a）為電機(jī)控制主回路，圖(b)為plc控制電路。2選 cpmia 10點(diǎn) plc（也可以選其它型號(hào) plc）題三： 一臺(tái)三相交流電機(jī)驅(qū)動(dòng)機(jī)床工作自前后

3、運(yùn)動(dòng)，sq1和sq2為限位開(kāi)關(guān)，安裝在機(jī)床前后的預(yù)定位置上當(dāng)按下正向啟動(dòng)按鈕 sb1，電動(dòng)機(jī)正轉(zhuǎn)，機(jī)床工作臺(tái)向前運(yùn)行，當(dāng)運(yùn)行到終端位置時(shí)，裝在機(jī)床工作臺(tái)上的擋鐵（撞塊）碰撞限位開(kāi)關(guān)sq1，電動(dòng)機(jī)斷電停轉(zhuǎn)，機(jī)床工作臺(tái)停止運(yùn)行；按下反向啟動(dòng)按鈕sb2時(shí)，電動(dòng)機(jī)反轉(zhuǎn)，機(jī)床工作臺(tái)向后運(yùn)行，當(dāng)運(yùn)行到終端位置時(shí)，裝在機(jī)床工作臺(tái)上的擋鐵（撞塊）碰撞限位開(kāi)關(guān)sq2，電動(dòng)機(jī)斷電停止，機(jī)床工作臺(tái)停止運(yùn)行；停機(jī)時(shí)按下停機(jī)按鈕sb3，電動(dòng)機(jī)停下來(lái)。過(guò)載時(shí)熱繼電器fr動(dòng)作，電動(dòng)機(jī)停止按上述工作要求：（1）設(shè)計(jì)電機(jī)控制主回路；（2）選擇plc，設(shè)計(jì)plc控制回路；（3）分配i/o 通道，畫(huà)出梯形圖題4：一臺(tái)三相交流電機(jī)驅(qū)

4、動(dòng)機(jī)床工作自前后運(yùn)動(dòng)，sq1和sq2為限位開(kāi)關(guān)，安裝在機(jī)床前后的預(yù)定位置上當(dāng)按下正向啟動(dòng)按鈕 sb1，電動(dòng)機(jī)正轉(zhuǎn)，機(jī)床工作臺(tái)向前運(yùn)行，當(dāng)運(yùn)行到終端位置時(shí)，裝在機(jī)床工作臺(tái)上的擋鐵（撞塊）碰撞限位開(kāi)關(guān)sq1，電動(dòng)機(jī)反轉(zhuǎn)，機(jī)床工作臺(tái)向后運(yùn)行，當(dāng)運(yùn)行到終端位置時(shí)，裝在機(jī)床工作臺(tái)上的擋鐵（撞塊）碰撞限位開(kāi)關(guān)sq2，電動(dòng)機(jī)反轉(zhuǎn)，機(jī)床工作臺(tái)向前運(yùn)行，不斷往復(fù)運(yùn)動(dòng)斷電停止，停機(jī)時(shí)按下停機(jī)按鈕sb3，電動(dòng)機(jī)停下來(lái)。過(guò)載時(shí)熱繼電器fr動(dòng)作，電動(dòng)機(jī)停止按上述工作要求：（1）設(shè)計(jì)電機(jī)控制主回路；（2）選擇plc，設(shè)計(jì)plc控制回路；（3）分配i/o 通道，畫(huà)出梯形圖。答案 題5：由兩臺(tái)三相交流電動(dòng)機(jī)m1、m2組成的控

5、制系統(tǒng)的工作過(guò)程是：按起動(dòng)按鈕，m1、m2電動(dòng)機(jī)同時(shí)起動(dòng)；接停止按鈕sb 2，m1電動(dòng)機(jī)停止工作，延時(shí)5秒后m2電動(dòng)機(jī)停止工作；若m2電動(dòng)機(jī)過(guò)載則兩臺(tái)電動(dòng)機(jī)都應(yīng)停機(jī)；若m1電動(dòng)機(jī)過(guò)載，則m1電動(dòng)機(jī)停機(jī)m2電動(dòng)機(jī)不停機(jī)按上述要求：（1）設(shè)計(jì)電機(jī)控制主回路；（2）選擇plc，設(shè)計(jì)plc控制回路；（3）分配i/o 通道，畫(huà)出梯形圖。答：題6： 由兩臺(tái)三相交流電動(dòng)機(jī)m1、m2組成的控制系統(tǒng)的工作過(guò)程是按起動(dòng)按鈕sb1，m1電動(dòng)機(jī)起動(dòng)，m1電動(dòng)機(jī)起動(dòng)后按sb2，m2電動(dòng)機(jī)起動(dòng)（若m1電動(dòng)機(jī)沒(méi)起動(dòng)，則m2電動(dòng)機(jī)不能起動(dòng)）；按停止按鈕sb3，m2電動(dòng)機(jī)停止，過(guò)5秒后m1電機(jī)停止；按急停按鈕sb4電動(dòng)機(jī)m1、

6、m2停止；若m2電動(dòng)機(jī)過(guò)載，則兩臺(tái)電動(dòng)機(jī)都應(yīng)停機(jī)。 按上述要求：（1）設(shè)計(jì)電機(jī)控制主回路；（2）選擇plc，設(shè)計(jì)plc控制回路；（3）分配i/o 通道，畫(huà)出梯形圖。答 （設(shè)計(jì)出電機(jī)控制主回路5分選plc和設(shè)計(jì)出plc控制回路6分；i/o點(diǎn)分配5分；設(shè)計(jì)出控制梯形圖6分。） a圖。）為電機(jī)控制主回路，b圖）為plc控制電路。 2選cpmia10點(diǎn)plc（也可以選其它型號(hào)plc）題7： 接起動(dòng)按sb1后，一臺(tái)三相交流電動(dòng)機(jī)運(yùn)轉(zhuǎn)10s，停止5s，重復(fù)動(dòng)作3次后停止運(yùn)轉(zhuǎn)；按下急停按鈕sb2電動(dòng)機(jī)停止；過(guò)載時(shí)熱繼電器fr動(dòng)作，電動(dòng)機(jī)停止。 按上述要求； 1）設(shè)計(jì)電機(jī)控制主回路； （2）選則plc，設(shè)計(jì)p

7、lc控制回路（3）分配io通道，畫(huà)出梯形圖答：winger tuivasa-sheck, who scored two tries in the kiwis 20-18 semi-final win over england, has been passed fit after a lower-leg injury, while slater has been named at full-back but is still recovering from a knee injury aggravated against usa.both sides boast 100% records hea

8、ding into the encounter but australia have not conceded a try since josh charnleys effort in their first pool match against england on the opening day.aussie winger jarryd hayne is the competitions top try scorer with nine, closely followed by tuivasa-sheck with eight.but it is recently named rugby

9、league international federation player of the year sonny bill williams who has attracted the most interest in the tournament so far.the kiwi - with a tournament high 17 offloads - has the chance of becoming the first player to win the world cup in both rugby league and rugby union after triumphing w

10、ith the all blacks in 2011.id give every award back in a heartbeat just to get across the line this weekend, said williams.the (lack of) air up there watch mcayman islands-based webb, the head of fifas anti-racism taskforce, is in london for the football associations 150th anniversary celebrations a

11、nd will attend citys premier league match at chelsea on sunday.i am going to be at the match tomorrow and i have asked to meet yaya toure, he told bbc sport.for me its about how he felt and i would like to speak to him first to find out what his experience was.uefa hasopened disciplinary proceedings

12、 against cskafor the racist behaviour of their fans duringcitys 2-1 win.michel platini, president of european footballs governing body, has also ordered an immediate investigation into the referees actions.cska said they were surprised and disappointed by toures complaint. in a statement the russian

13、 side added: we found no racist insults from fans of cska. baumgartner the disappointing news: mission aborted.the supersonic descent could happen as early as sunda.the weather plays an important role in this mission. starting at the ground, conditions have to be very calm - winds less than 2 mph, w

14、ith no precipitation or humidity and limited cloud cover. the balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. it will climb higher than the tip of mount everest (5.5 miles/8.85 kilometers), drifting even higher

15、 than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. as he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.the balloon will slowly drift to the edge of space at 120,000 feet ( then, i would assume, he will slow

16、ly step out onto something resembling an olympic diving platform.they blew it in 2008 when they got caught cold in the final and they will not make the same mistake against the kiwis in manchester.five years ago they cruised through to the final and so far history has repeated itself here - the last

17、 try they conceded was scored by englands josh charnley in the opening game of the tournament.that could be classed as a weakness, a team under-cooked - but i have been impressed by the kangaroos focus in their games since then.they have been concentrating on the sort of stuff that wins you tough, e

18、ven contests - strong defence, especially on their own goal-line, completing sets and a good kick-chase. theyve been great at all the unglamorous stuff that often goes unnoticed in the stands but not by your team-mates.it is as though their entire tournament has been preparation for the final.in johnathan thurston, cooper cronk, cameron smith and either billy slater or greg inglis at full-back they have a spine that is unmatched in rugby league. they have played in so many high-pressure games - a pricele