由于整(zheng)流(liu)(liu)變繞組電(dian)流(liu)(liu)是(shi)非(fei)正弦的含(han)有很多高次諧波(bo)，為(wei)了減小對電(dian)網的諧波(bo)污染，為(wei)了提高功率因(yin)數，必須(xu)提高整(zheng)流(liu)(liu)設備的脈波(bo)數，這可以通過(guo)移相的方法(fa)來解決(jue)。移相的目(mu)的是(shi)使整(zheng)流(liu)(liu)變(bian)壓器二次繞組的(de)同名端線電壓之間有一個相位移(yi)。

      簡單的移相方(fang)法就是二次(ci)側采用量、角聯(lian)結(jie)的兩個繞組，可以使整(zheng)流電(dian)爐的脈波數(shu)提(ti)高(gao)一倍。

　　對于大功(gong)率整(zheng)流(liu)設備，需要脈波數也較多，脈波數為18、24、36等應用的日益增多，這(zhe)就必須在(zai)整(zheng)流(liu)變壓器一(yi)次(ci)側設置移(yi)相(xiang)繞(rao)組來(lai)進行移(yi)相(xiang)。移(yi)相(xiang)繞(rao)組與(yu)主繞(rao)組聯結方式有(you)三(san)(san)種(zhong)，即曲(qu)折(zhe)線、六邊(bian)形和延(yan)邊(bian)三(san)(san)角形。

　　用(yong)于(yu)電(dian)(dian)(dian)(dian)化學行業的(de)(de)(de)整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)變(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)的(de)(de)(de)調(diao)(diao)(diao)壓(ya)(ya)范圍(wei)比電(dian)(dian)(dian)(dian)爐(lu)變(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)要大的(de)(de)(de)多(duo)，對(dui)于(yu)化工(gong)食鹽電(dian)(dian)(dian)(dian)解(jie)，調(diao)(diao)(diao)壓(ya)(ya)范圍(wei)通(tong)常(chang)是(shi)(shi)55％--105％，對(dui)于(yu)鋁電(dian)(dian)(dian)(dian)解(jie)來說，調(diao)(diao)(diao)壓(ya)(ya)范圍(wei)通(tong)常(chang)是(shi)(shi)5％--105％。常(chang)用(yong)的(de)(de)(de)調(diao)(diao)(diao)壓(ya)(ya)方式(shi)如(ru)電(dian)(dian)(dian)(dian)爐(lu)變(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)一(yi)樣有變(bian)(bian)磁(ci)(ci)通(tong)調(diao)(diao)(diao)壓(ya)(ya)，串聯變(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)調(diao)(diao)(diao)壓(ya)(ya)和自耦調(diao)(diao)(diao)壓(ya)(ya)器(qi)(qi)(qi)調(diao)(diao)(diao)壓(ya)(ya)。另外，由(you)(you)于(yu)整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)元(yuan)件的(de)(de)(de)特性，可以(yi)在整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)爐(lu)的(de)(de)(de)閥側直(zhi)(zhi)接控(kong)制硅(gui)整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)元(yuan)件導通(tong)的(de)(de)(de)相位(wei)角度，可以(yi)平(ping)滑的(de)(de)(de)調(diao)(diao)(diao)整(zheng)(zheng)(zheng)整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)平(ping)均值，這種調(diao)(diao)(diao)壓(ya)(ya)方式(shi)稱為相控(kong)調(diao)(diao)(diao)壓(ya)(ya)。實現相控(kong)調(diao)(diao)(diao)壓(ya)(ya)，一(yi)是(shi)(shi)采用(yong)晶閥管(guan)，二是(shi)(shi)采用(yong)自飽和電(dian)(dian)(dian)(dian)抗(kang)(kang)器(qi)(qi)(qi)，自飽和電(dian)(dian)(dian)(dian)抗(kang)(kang)器(qi)(qi)(qi)基本(ben)上是(shi)(shi)由(you)(you)一(yi)個鐵心(xin)和兩(liang)個繞(rao)組(zu)組(zu)成的(de)(de)(de)，一(yi)個是(shi)(shi)工(gong)作繞(rao)組(zu)，它串聯聯結在整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)變(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)二次繞(rao)組(zu)與(yu)整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)器(qi)(qi)(qi)之(zhi)間，流(liu)(liu)(liu)(liu)過負載電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)；另一(yi)個是(shi)(shi)直(zhi)(zhi)流(liu)(liu)(liu)(liu)控(kong)制繞(rao)組(zu)，是(shi)(shi)由(you)(you)另外的(de)(de)(de)直(zhi)(zhi)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)源提供(gong)直(zhi)(zhi)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)，其(qi)主要原理就是(shi)(shi)利(li)用(yong)鐵磁(ci)(ci)材料的(de)(de)(de)非(fei)線性變(bian)(bian)化，使工(gong)作繞(rao)組(zu)電(dian)(dian)(dian)(dian)抗(kang)(kang)值有很大的(de)(de)(de)變(bian)(bian)化。調(diao)(diao)(diao)節(jie)直(zhi)(zhi)流(liu)(liu)(liu)(liu)控(kong)制電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)，即可調(diao)(diao)(diao)節(jie)相控(kong)角α，從而調(diao)(diao)(diao)節(jie)整(zheng)(zheng)(zheng)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)平(ping)均值。