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     三(san)(san)(san)相(xiang)(xiang)(xiang)變(bian)(bian)單相(xiang)(xiang)(xiang)變(bian)(bian)壓(ya)(ya)(ya)器(qi)是一種(zhong)電(dian)(dian)(dian)(dian)力(li)變(bian)(bian)壓(ya)(ya)(ya)器(qi)，它可以將(jiang)三(san)(san)(san)相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)(liu)轉化為單相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)(liu)。這種(zhong)變(bian)(bian)壓(ya)(ya)(ya)器(qi)原理是基于磁(ci)通(tong)量(liang)守恒(heng)定律和歐姆(mu)定律的(de)(de)(de)。三(san)(san)(san)相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)(liu)是由三(san)(san)(san)根(gen)電(dian)(dian)(dian)(dian)線(xian)組(zu)(zu)成(cheng)，它們(men)之間的(de)(de)(de)相(xiang)(xiang)(xiang)位差為120度。而單相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)(liu)只有兩根(gen)電(dian)(dian)(dian)(dian)線(xian)，因此(ci)需(xu)要使用變(bian)(bian)壓(ya)(ya)(ya)器(qi)將(jiang)三(san)(san)(san)相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)(liu)轉化為單相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)三(san)(san)(san)相(xiang)(xiang)(xiang)變(bian)(bian)單相(xiang)(xiang)(xiang)變(bian)(bian)壓(ya)(ya)(ya)器(qi)的(de)(de)(de)原理是通(tong)過三(san)(san)(san)相(xiang)(xiang)(xiang)繞(rao)組(zu)(zu)的(de)(de)(de)磁(ci)感應強度的(de)(de)(de)合成(cheng)來產生(sheng)單相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)。它包含三(san)(san)(san)個(ge)(ge)獨立的(de)(de)(de)繞(rao)組(zu)(zu)，在(zai)三(san)(san)(san)相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)源輸入時(shi)(shi)，每個(ge)(ge)繞(rao)組(zu)(zu)的(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)相(xiang)(xiang)(xiang)位差為120度。當三(san)(san)(san)相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)(liu)通(tong)過變(bian)(bian)壓(ya)(ya)(ya)器(qi)時(shi)(shi)，它們(men)在(zai)磁(ci)通(tong)量(liang)上的(de)(de)(de)合成(cheng)會產生(sheng)單相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)。

    這個單相電壓的大小和相位取決于三相電流的大小和相位差。三相變單相變壓器的應用范圍很廣，可以用于家庭、商業和工業

場(chang)(chang)所的電(dian)氣(qi)設(she)備(bei)。在家庭中，它可(ke)(ke)以(yi)(yi)用于(yu)電(dian)視、電(dian)冰箱、電(dian)扇(shan)等(deng)電(dian)器設(she)備(bei)。在商業場(chang)(chang)所中，它可(ke)(ke)以(yi)(yi)用于(yu)照明、空調等(deng)設(she)備(bei)。在工(gong)業場(chang)(chang)所中，它可(ke)(ke)以(yi)(yi)用于(yu)機器設(she)備(bei)、電(dian)動(dong)機等(deng)設(she)備(bei)。