大連控制柜、變頻控制箱和大連PLC變頻控制柜出(chu)現(xian)在(zai)市(shi)(shi)場(chang)中引(yin)起銷售熱潮，其(qi)功能(neng)全面特(te)點是(shi)起到很大(da)作用，不同(tong)功能(neng)迎合到市(shi)(shi)場(chang)不同(tong)用戶群體，迅速占據到各(ge)大(da)市(shi)(shi)場(chang)空間(jian)。以(yi)下就(jiu)來為大(da)家全面介紹PLC變頻控(kong)制(zhi)柜功能(neng)信息內容： 

1、電(dian)源切換與(yu)保(bao)(bao)護(hu)功能(neng)，PLC變(bian)頻(pin)控制(zhi)(zhi)柜通(tong)常(chang)設計有短路器元(yuan)件，連接(jie)著進線電(dian)源，可(ke)以幫助變(bian)頻(pin)設備完成(cheng)電(dian)路通(tong)斷控制(zhi)(zhi)，并能(neng)夠(gou)在電(dian)路和變(bian)頻(pin)器出現(xian)短路或是運行(xing)過載時給予保(bao)(bao)護(hu)，解決(jue)設備在運行(xing)中會發生電(dian)力(li)輸送(song)安(an)全問題，對操控人員(yuan)人身安(an)全起到保(bao)(bao)護(hu)。 

2、變頻調速(su)功(gong)能，PLC變頻控制柜面板上(shang)設有(you)變頻調速(su)用電(dian)位器(qi)，可(ke)以根(gen)據操作人員輸送頻率(lv)，向(xiang)電(dian)機(ji)輸送指令信(xin)號，控制電(dian)機(ji)運行速(su)度，并(bing)且在(zai)部(bu)分產品設有(you)工頻切換(huan)功(gong)能，以確保變頻器(qi)出(chu)現故(gu)障時，可(ke)以通過裝置實現最低(di)故(gu)障發生，減少(shao)設備出(chu)現損壞次數。 

國家發改委(wei)啟動的十(shi)大重點節(jie)能(neng)工(gong)程之一就是電機(ji)(ji)系(xi)統節(jie)能(neng)，并要求(qiu)：推廣變(bian)頻調(diao)(diao)速(su)節(jie)能(neng)技(ji)術(shu)，風機(ji)(ji)、水(shui)泵、壓縮機(ji)(ji)等(deng)通用(yong)機(ji)(ji)械系(xi)統采用(yong)變(bian)頻調(diao)(diao)速(su)節(jie)能(neng)措施(shi)(shi)，工(gong)業(ye)機(ji)(ji)械采用(yong)交流電動機(ji)(ji)變(bian)頻調(diao)(diao)速(su)技(ji)術(shu)；制(zhi)定相關(guan)經(jing)濟(ji)激勵政策、完(wan)善電機(ji)(ji)能(neng)效(xiao)標準體系(xi)等(deng)配(pei)套(tao)措施(shi)(shi)；“十(shi)一五”期間，實現電機(ji)(ji)系(xi)統運(yun)行效(xiao)率提(ti)高2個百分(fen)點，形成(cheng)年(nian)節(jie)電能(neng)力200億千(qian)瓦時。 

為(wei)推(tui)動全(quan)(quan)社(she)會展開節能(neng)降耗，緩解能(neng)源瓶(ping)頸的制約(yue)，建設節能(neng)型社(she)會，國(guo)家發改委制定了《節能(neng)中長期專(zhuan)項規(gui)劃》，并在2004年11月25日向全(quan)(quan)社(she)會發布。該(gai)“規(gui)劃”明確指出：能(neng)源是(shi)戰略(lve)資源，是(shi)全(quan)(quan)面建設小康(kang)社(she)會的重要物(wu)質基(ji)礎，必須堅持(chi)節約(yue)優先。 

隨著電(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)技術和開(kai)(kai)關(guan)(guan)行業(ye)的(de)(de)(de)飛速(su)發展，電(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)設備與人(ren)們的(de)(de)(de)工作、生活的(de)(de)(de)關(guan)(guan)系日益密切，而電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)設備都(dou)離不開(kai)(kai)可靠的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)，進(jin)入80年(nian)代(dai)計算機(ji)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)全面實現(xian)了(le)開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)化，率先完成(cheng)(cheng)計算機(ji)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)換(huan)代(dai)，進(jin)入90年(nian)代(dai)開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)相繼進(jin)入各種電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)、電(dian)(dian)(dian)(dian)(dian)(dian)器設備領(ling)域(yu)，程(cheng)控(kong)交換(huan)機(ji)、通訊、電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)檢(jian)測設備電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)、控(kong)制設備電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)等都(dou)已廣泛地使用(yong)了(le)開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)，更促進(jin)了(le)開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)技術的(de)(de)(de)迅(xun)速(su)發展。開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)是(shi)利用(yong)現(xian)代(dai)電(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)技術，控(kong)制開(kai)(kai)關(guan)(guan)晶體管開(kai)(kai)通和關(guan)(guan)斷(duan)的(de)(de)(de)時間比率，維(wei)持穩定輸出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)(de)(de)一(yi)種電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)，開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)一(yi)般(ban)由脈(mo)沖寬度調制（PWM）控(kong)制IC和MOSFET構成(cheng)(cheng)。開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)和線性電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)相比，二者的(de)(de)(de)成(cheng)(cheng)本(ben)都(dou)隨著輸出(chu)功率的(de)(de)(de)增加而增長，但二者增長速(su)率各異。