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為高壓軟啟動柜運行安全高壓和低壓需隔離開來

來源:tjiaqi.cn 發布時間:2021/7/2 9:09:43

高壓軟起動柜精心設計,考慮各種要求,以保障各種使用對象和使用場合。高壓固態軟啟動柜價格,高壓軟啟動柜廠家分(fen)(fen)(fen)享結(jie)構采用GB11022-1999-T高壓(ya)開(kai)關(guan)設備,和控制(zhi)設備的(de)(de)共(gong)用技術要求(qiu),在柜體(ti)中應(ying)用密封處(chu)理,減少對機器(qi)內(nei)部(bu)的(de)(de)污染,布(bu)局合理。數字觸(chu)發系統(tong)將低(di)(di)壓(ya)控制(zhi)通,過光纖連(lian)接到高壓(ya)部(bu)分(fen)(fen)(fen),便捷的(de)(de)維(wei)修設計允許各相模(mo)塊可以(yi)迅速單獨進行(xing)更換。為運行(xing)安全(quan)起見(jian),高壓(ya)部(bu)分(fen)(fen)(fen)和低(di)(di)壓(ya)部(bu)分(fen)(fen)(fen)完全(quan)隔離開(kai)來。   


主要(yao)由(you)可(ke)控硅串(chuan)并聯和旁路接觸器(qi)組成。SCR電(dian)源器(qi)件,在每相中是用一對(dui)(dui)相同參數的(de)(de),SCR反相平行的(de)(de)安裝(zhuang)在一組的(de)(de)。為(wei)了(le)達到所有使用電(dian)網的(de)(de)峰(feng)值,電(dian)壓要(yao)求,對(dui)(dui)SCR進行串(chuan)聯。通過(guo)控制可(ke)控硅的(de)(de)開關(guan)以實現對(dui)(dui)交流(liu)三相電(dian)源進行斬波,控制輸出電(dian)壓的(de)(de)幅(fu)值,并在啟(qi)動過(guo)程完(wan)成后(hou),將高壓電(dian)機軟(ruan)啟(qi)動裝(zhuang)置,切換到旁路狀態。   

電(dian)子(zi)控(kong)(kong)制電(dian)路(lu)分為低(di)壓、中高壓兩(liang)部(bu)(bu)分,并(bing)隔離成兩(liang)個獨立的(de)部(bu)(bu)分。低(di)壓電(dian)子(zi)部(bu)(bu)分包(bao)括(kuo)控(kong)(kong)制界面和(he)(he)(he)接口。主要(yao)包(bao)括(kuo)由微控(kong)(kong)制器(qi)組成的(de)數字電(dian)路(lu)、由光纖組成的(de)光電(dian)隔離電(dian)路(lu)、可控(kong)(kong)硅觸(chu)發電(dian)路(lu)、電(dian)流檢測和(he)(he)(he)電(dian)壓檢測電(dian)路(lu)、溫(wen)度檢測電(dian)路(lu)等等是重要(yao)部(bu)(bu)分,控(kong)(kong)制晶閘管的(de)導通和(he)(he)(he)關閉,從而完成對電(dian)機的(de)起(qi)動和(he)(he)(he)停車的(de)理想化的(de)控(kong)(kong)制。   


軟(ruan)(ruan)起(qi)動(dong)器有(you)多種起(qi)動(dong)方(fang)式(shi),限流(liu)軟(ruan)(ruan)起(qi)動(dong),電壓(ya)線性曲線起(qi)動(dong),電壓(ya)指數曲線起(qi)動(dong)、電流(liu)線性曲線起(qi)動(dong),電流(liu)指數曲線起(qi)動(dong),多種停車(che)(che)(che)方(fang)式(shi):自由停車(che)(che)(che)、軟(ruan)(ruan)停車(che)(che)(che),制動(dong)剎車(che)(che)(che),軟(ruan)(ruan)停+制動(dong)剎車(che)(che)(che),還(huan)具(ju)有(you)點動(dong)功能。   


使用限流(liu)(liu)軟起(qi)動(dong)(dong)(dong)模式時,起(qi)動(dong)(dong)(dong)時間(jian)設(she)(she)(she)置為零,軟起(qi)動(dong)(dong)(dong)器得到起(qi)動(dong)(dong)(dong)指令后(hou),其(qi)輸(shu)(shu)出(chu)(chu)電(dian)(dian)壓(ya)迅(xun)(xun)速增(zeng)(zeng)(zeng)(zeng)加,直至(zhi)輸(shu)(shu)出(chu)(chu)電(dian)(dian)流(liu)(liu)達到設(she)(she)(she)定(ding)電(dian)(dian)流(liu)(liu)限幅值Im,輸(shu)(shu)出(chu)(chu)電(dian)(dian)流(liu)(liu)不再增(zeng)(zeng)(zeng)(zeng)大,電(dian)(dian)動(dong)(dong)(dong)機運轉加速持續一段時間(jian)后(hou)電(dian)(dian)流(liu)(liu)開(kai)始下降,輸(shu)(shu)出(chu)(chu)電(dian)(dian)壓(ya)迅(xun)(xun)速增(zeng)(zeng)(zeng)(zeng)加,直至(zhi)全壓(ya)輸(shu)(shu)出(chu)(chu),起(qi)動(dong)(dong)(dong)過(guo)程(cheng)完成。 輸(shu)(shu)出(chu)(chu)電(dian)(dian)壓(ya)以設(she)(she)(she)定(ding)的起(qi)動(dong)(dong)(dong)時間(jian)按照指數特性上升,同時輸(shu)(shu)出(chu)(chu)電(dian)(dian)流(liu)(liu)以一定(ding)的速率增(zeng)(zeng)(zeng)(zeng)加,當起(qi)動(dong)(dong)(dong)電(dian)(dian)流(liu)(liu)增(zeng)(zeng)(zeng)(zeng)至(zhi)限幅值Im時,電(dian)(dian)流(liu)(liu)保(bao)持恒定(ding),直至(zhi)起(qi)動(dong)(dong)(dong)完成。   


軟(ruan)(ruan)停(ting)車(che)時(shi)間(jian)設定不(bu)為(wei)零(ling)時(shi),在(zai)全壓狀(zhuang)態(tai)下停(ting)車(che)則為(wei)軟(ruan)(ruan)停(ting)車(che),在(zai)該方式下停(ting)機,軟(ruan)(ruan)起動器(qi)首先(xian)斷開旁路(lu)接(jie)觸(chu)器(qi),軟(ruan)(ruan)起動器(qi)的(de)(de)輸出電壓在(zai)設定的(de)(de)軟(ruan)(ruan)停(ting)車(che)時(shi)間(jian)內逐漸降至(zhi)所(suo)設定的(de)(de)軟(ruan)(ruan)停(ting)終(zhong)了電壓值,軟(ruan)(ruan)停(ting)車(che)過程結束起動器(qi)轉為(wei)剎車(che)制動狀(zhuang)態(tai)(剎車(che)時(shi)間(jian)不(bu)為(wei)零(ling))或自由(you)停(ting)止。   


當軟起(qi)動器設置了(le)(le)剎車(che)(che)時(shi)間(jian)(jian)(jian)(1M09功能項)并且選擇,了(le)(le)剎車(che)(che)時(shi)間(jian)(jian)(jian)繼(ji)(ji)電器輸出,則當軟起(qi)動器自(zi)由停止(zhi)后,剎車(che)(che)時(shi)間(jian)(jian)(jian)繼(ji)(ji)電器輸出信號在(zai)停,(剎)車(che)(che)時(shi)間(jian)(jian)(jian)內保持(chi)有效。用該(gai)時(shi)間(jian)(jian)(jian)繼(ji)(ji)電器輸出信號,控(kong)(kong)制(zhi)外置制(zhi)動單(dan)元或(huo)機械抱閘電氣控(kong)(kong)制(zhi)單(dan)元。 


當軟起動器設置了(le)軟停(ting)(ting)時間(jian),并且設置了(le)剎(cha)車(che)時間(jian),軟起動器首(shou)先斷開旁路(lu)接觸器,軟起動器的輸出電壓在設定的軟停(ting)(ting)車(che)時間(jian)內(nei)(nei),逐漸(jian)降至(zhi)所(suo)設定的軟停(ting)(ting)終了(le)電壓值,軟停(ting)(ting)車(che)過程結(jie)束后(hou)在所(suo),定的剎(cha)車(che)時間(jian)內(nei)(nei)剎(cha)車(che)。