大連控制柜、變頻控制箱和大連PLC變頻控制柜出現在市場(chang)中引起(qi)銷售熱潮，其(qi)功能(neng)全面(mian)特點是起(qi)到很大(da)作用，不同功能(neng)迎合到市場(chang)不同用戶群體，迅速占據到各大(da)市場(chang)空(kong)間。以下就來(lai)為大(da)家全面(mian)介(jie)紹PLC變頻控制柜功能(neng)信息內(nei)容： 

1、電源切(qie)換與保護(hu)功(gong)能(neng)，PLC變(bian)頻(pin)控(kong)(kong)制柜通(tong)常設(she)計有短(duan)路器元件(jian)，連接著進線電源，可以幫(bang)助(zhu)變(bian)頻(pin)設(she)備(bei)完成電路通(tong)斷控(kong)(kong)制，并能(neng)夠在(zai)電路和(he)變(bian)頻(pin)器出現短(duan)路或是(shi)運行(xing)過載時給(gei)予保護(hu)，解決設(she)備(bei)在(zai)運行(xing)中會發生電力輸(shu)送安全問題，對操控(kong)(kong)人員人身安全起到保護(hu)。 

2、變頻(pin)調(diao)速(su)功(gong)能(neng)，PLC變頻(pin)控(kong)制柜面(mian)板上(shang)設有變頻(pin)調(diao)速(su)用電位器，可以(yi)(yi)根據操作人員輸(shu)送(song)頻(pin)率，向電機輸(shu)送(song)指令信號(hao)，控(kong)制電機運行速(su)度，并(bing)且在部分產品設有工頻(pin)切換功(gong)能(neng)，以(yi)(yi)確保變頻(pin)器出現(xian)(xian)故障(zhang)時(shi)，可以(yi)(yi)通過裝置(zhi)實現(xian)(xian)最(zui)低故障(zhang)發生，減少設備出現(xian)(xian)損壞(huai)次數。 

國家發改(gai)委啟動的(de)十(shi)(shi)大重點節(jie)(jie)(jie)能(neng)(neng)工(gong)程之一(yi)就是電(dian)機系(xi)統(tong)節(jie)(jie)(jie)能(neng)(neng)，并要求(qiu)：推廣變頻(pin)調速節(jie)(jie)(jie)能(neng)(neng)技術，風機、水(shui)泵、壓縮機等通用機械(xie)系(xi)統(tong)采用變頻(pin)調速節(jie)(jie)(jie)能(neng)(neng)措施(shi)，工(gong)業機械(xie)采用交(jiao)流電(dian)動機變頻(pin)調速技術；制定相關經濟(ji)激勵(li)政(zheng)策、完善電(dian)機能(neng)(neng)效標(biao)準體系(xi)等配套措施(shi)；“十(shi)(shi)一(yi)五”期間，實現(xian)電(dian)機系(xi)統(tong)運行效率提高2個百分點，形成年節(jie)(jie)(jie)電(dian)能(neng)(neng)力(li)200億千瓦時。 

為推(tui)動(dong)全(quan)社會(hui)(hui)展(zhan)開節能(neng)降耗，緩解能(neng)源瓶(ping)頸的(de)制(zhi)約，建設(she)節能(neng)型(xing)社會(hui)(hui)，國家發(fa)改委(wei)制(zhi)定了《節能(neng)中長(chang)期(qi)專項規(gui)劃(hua)》，并在2004年11月25日向全(quan)社會(hui)(hui)發(fa)布。該“規(gui)劃(hua)”明確指出：能(neng)源是(shi)(shi)戰略資源，是(shi)(shi)全(quan)面建設(she)小康社會(hui)(hui)的(de)重要物質基礎，必須堅持節約優(you)先(xian)。 

隨(sui)(sui)著電(dian)(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)(dian)子技術和開(kai)(kai)關(guan)行業的(de)(de)(de)飛速發(fa)展(zhan)(zhan)，電(dian)(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)(dian)子設(she)備(bei)與人們的(de)(de)(de)工作、生活的(de)(de)(de)關(guan)系日益(yi)密切，而電(dian)(dian)(dian)(dian)(dian)子設(she)備(bei)都離不開(kai)(kai)可靠的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，進(jin)入80年代計(ji)算機電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)全面實現(xian)了(le)(le)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)化，率(lv)先完成計(ji)算機的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)換代，進(jin)入90年代開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)相(xiang)繼進(jin)入各(ge)種(zhong)電(dian)(dian)(dian)(dian)(dian)子、電(dian)(dian)(dian)(dian)(dian)器(qi)設(she)備(bei)領域，程控交換機、通訊、電(dian)(dian)(dian)(dian)(dian)子檢測(ce)設(she)備(bei)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)、控制設(she)備(bei)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)等都已廣泛地使用了(le)(le)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，更促進(jin)了(le)(le)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)技術的(de)(de)(de)迅速發(fa)展(zhan)(zhan)。開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)是利用現(xian)代電(dian)(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)(dian)子技術，控制開(kai)(kai)關(guan)晶體管開(kai)(kai)通和關(guan)斷的(de)(de)(de)時間比率(lv)，維持(chi)穩(wen)定輸出電(dian)(dian)(dian)(dian)(dian)壓的(de)(de)(de)一種(zhong)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)一般由脈(mo)沖寬度調制（PWM）控制IC和MOSFET構成。開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)和線(xian)性電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)相(xiang)比，二者(zhe)的(de)(de)(de)成本(ben)都隨(sui)(sui)著輸出功率(lv)的(de)(de)(de)增(zeng)加而增(zeng)長，但二者(zhe)增(zeng)長速率(lv)各(ge)異。