公(gong)司(si):上海華(hua)穩電(dian)氣(qi)有限公(gong)司(si)
公司址:上海市嘉定區霜竹公路4775號
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網 址:ultrarunning.cn
由(you)于整流(liu)(liu)變繞組電流(liu)(liu)是(shi)非正(zheng)弦的(de)(de)含有(you)很多高次諧波,為了減小對電網的(de)(de)諧波污(wu)染(ran),為了提(ti)高功率因數,必須提(ti)高整流(liu)(liu)設備的(de)(de)脈波數,這可以通過移相的(de)(de)方法來解決。移相的(de)(de)目的(de)(de)是(shi)使整流(liu)(liu)變壓器二次繞(rao)組的同名端(duan)線電(dian)壓之間有一個相位移。
簡單的移相方法就(jiu)是二(er)次側(ce)采(cai)用量(liang)、角聯結的兩個繞組,可以(yi)使整(zheng)流電爐(lu)的脈(mo)波數(shu)提(ti)高一倍。
對于大功(gong)率整流(liu)設備,需(xu)要脈波數也較多(duo),脈波數為18、24、36等應用的日益增多(duo),這就必須在整流(liu)變壓器一次側設置移(yi)(yi)相繞組來進行(xing)移(yi)(yi)相。移(yi)(yi)相繞組與主繞組聯結方(fang)式(shi)有(you)三(san)種,即(ji)曲折線、六邊形和延(yan)邊三(san)角形。
用于電(dian)(dian)(dian)化(hua)學行(xing)業的(de)(de)(de)(de)整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)變壓(ya)(ya)(ya)(ya)器(qi)(qi)的(de)(de)(de)(de)調(diao)(diao)壓(ya)(ya)(ya)(ya)范(fan)圍(wei)比電(dian)(dian)(dian)爐(lu)變壓(ya)(ya)(ya)(ya)器(qi)(qi)要大的(de)(de)(de)(de)多(duo),對(dui)于化(hua)工(gong)食鹽(yan)電(dian)(dian)(dian)解(jie),調(diao)(diao)壓(ya)(ya)(ya)(ya)范(fan)圍(wei)通常(chang)(chang)是55%--105%,對(dui)于鋁(lv)電(dian)(dian)(dian)解(jie)來說,調(diao)(diao)壓(ya)(ya)(ya)(ya)范(fan)圍(wei)通常(chang)(chang)是5%--105%。常(chang)(chang)用的(de)(de)(de)(de)調(diao)(diao)壓(ya)(ya)(ya)(ya)方式(shi)如電(dian)(dian)(dian)爐(lu)變壓(ya)(ya)(ya)(ya)器(qi)(qi)一(yi)(yi)(yi)樣有(you)(you)變磁通調(diao)(diao)壓(ya)(ya)(ya)(ya),串聯變壓(ya)(ya)(ya)(ya)器(qi)(qi)調(diao)(diao)壓(ya)(ya)(ya)(ya)和自(zi)耦調(diao)(diao)壓(ya)(ya)(ya)(ya)器(qi)(qi)調(diao)(diao)壓(ya)(ya)(ya)(ya)。另(ling)外,由(you)于整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)元件(jian)的(de)(de)(de)(de)特(te)性(xing),可以(yi)在整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)爐(lu)的(de)(de)(de)(de)閥(fa)側直(zhi)(zhi)接控(kong)制(zhi)(zhi)硅整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)元件(jian)導通的(de)(de)(de)(de)相(xiang)位(wei)角度,可以(yi)平滑(hua)的(de)(de)(de)(de)調(diao)(diao)整(zheng)(zheng)(zheng)整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)平均值(zhi),這種調(diao)(diao)壓(ya)(ya)(ya)(ya)方式(shi)稱為相(xiang)控(kong)調(diao)(diao)壓(ya)(ya)(ya)(ya)。實(shi)現(xian)相(xiang)控(kong)調(diao)(diao)壓(ya)(ya)(ya)(ya),一(yi)(yi)(yi)是采(cai)用晶閥(fa)管,二是采(cai)用自(zi)飽和電(dian)(dian)(dian)抗器(qi)(qi),自(zi)飽和電(dian)(dian)(dian)抗器(qi)(qi)基本上是由(you)一(yi)(yi)(yi)個(ge)鐵心(xin)和兩個(ge)繞組(zu)(zu)組(zu)(zu)成的(de)(de)(de)(de),一(yi)(yi)(yi)個(ge)是工(gong)作繞組(zu)(zu),它串聯聯結在整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)變壓(ya)(ya)(ya)(ya)器(qi)(qi)二次繞組(zu)(zu)與整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)之間(jian),流(liu)(liu)(liu)(liu)(liu)過負載電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu);另(ling)一(yi)(yi)(yi)個(ge)是直(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)控(kong)制(zhi)(zhi)繞組(zu)(zu),是由(you)另(ling)外的(de)(de)(de)(de)直(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源提供(gong)直(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu),其(qi)主要原理就(jiu)是利用鐵磁材料的(de)(de)(de)(de)非線性(xing)變化(hua),使工(gong)作繞組(zu)(zu)電(dian)(dian)(dian)抗值(zhi)有(you)(you)很大的(de)(de)(de)(de)變化(hua)。調(diao)(diao)節直(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)控(kong)制(zhi)(zhi)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu),即(ji)可調(diao)(diao)節相(xiang)控(kong)角α,從而調(diao)(diao)節整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)平均值(zhi)。