變壓器的原理

變(bian)壓(ya)(ya)器的(de)(de)(de)原(yuan)(yuan)理(li)并不復雜，它利(li)用(yong)了電(dian)(dian)(dian)(dian)磁(ci)(ci)感(gan)應原(yuan)(yuan)理(li)。當其中(zhong)一(yi)塊導(dao)電(dian)(dian)(dian)(dian)體有一(yi)些(xie)不定量的(de)(de)(de)電(dian)(dian)(dian)(dian)流通(tong)過(guo)，便(bian)會(hui)(hui)產生(sheng)(sheng)變(bian)動的(de)(de)(de)磁(ci)(ci)場。根據電(dian)(dian)(dian)(dian)磁(ci)(ci)的(de)(de)(de)互感(gan)原(yuan)(yuan)理(li)，這(zhe)變(bian)動的(de)(de)(de)磁(ci)(ci)場會(hui)(hui)使(shi)第二塊導(dao)電(dian)(dian)(dian)(dian)體產生(sheng)(sheng)電(dian)(dian)(dian)(dian)勢差。假如第二塊導(dao)電(dian)(dian)(dian)(dian)體是一(yi)條閉合(he)電(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)一(yi)部份，那(nei)么該閉合(he)電(dian)(dian)(dian)(dian)路(lu)便(bian)會(hui)(hui)產生(sheng)(sheng)電(dian)(dian)(dian)(dian)流。電(dian)(dian)(dian)(dian)力于是得以傳(chuan)送。在通(tong)用(yong)的(de)(de)(de)變(bian)壓(ya)(ya)器中(zhong)，有關的(de)(de)(de)導(dao)電(dian)(dian)(dian)(dian)體是由電(dian)(dian)(dian)(dian)線(xian)(xian)組(zu)成線(xian)(xian)圈，因為(wei)線(xian)(xian)圈所產生(sheng)(sheng)的(de)(de)(de)磁(ci)(ci)場要比(bi)一(yi)條筆直的(de)(de)(de)電(dian)(dian)(dian)(dian)線(xian)(xian)大得多。當初級(ji)線(xian)(xian)圈中(zhong)通(tong)有交流電(dian)(dian)(dian)(dian)流時(shi)，鐵(tie)芯中(zhong)便(bian)產生(sheng)(sheng)交流磁(ci)(ci)通(tong)，使(shi)次(ci)級(ji)線(xian)(xian)圈中(zhong)感(gan)應出電(dian)(dian)(dian)(dian)壓(ya)(ya)。初級(ji)線(xian)(xian)圈、次(ci)級(ji)線(xian)(xian)圈的(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)VS，VP和兩者的(de)(de)(de)繞(rao)線(xian)(xian)的(de)(de)(de)匝數(shu)NS，NP之(zhi)間有正比(bi)的(de)(de)(de)關系。

至于變壓器兩方之間的電流或電壓比例，則取決于兩方電路線圈的圈數。圈數較多的一方電壓較高但電流較小，反之亦然。如果撇除泄漏等因素，變壓器兩方的電壓比例相等于兩方的線圈圈數比例，亦即電壓與圈數成正比。因此可以減小或者增加原線圈和副線圈的匝數比，從而升高或者降低電壓，變壓器品牌產品的(de)(de)這(zhe)個(ge)性質使(shi)它(ta)成為轉換電壓(ya)的(de)(de)重要設備。由于變壓(ya)器遵守這(zhe)兩(liang)(liang)條定律，它(ta)不(bu)會是放大器。如(ru)果處在變壓(ya)器兩(liang)(liang)方的(de)(de)電壓(ya)有(you)所不(bu)同，那(nei)么流(liu)(liu)經變壓(ya)器兩(liang)(liang)方的(de)(de)電流(liu)(liu)也會不(bu)同，而兩(liang)(liang)者的(de)(de)差距則(ze)成反比。

干式變壓器和油浸式變壓器的區別

干式變(bian)壓器(qi)能(neng)直接看到(dao)鐵芯和(he)線(xian)圈，大多使(shi)用(yong)硅橡膠套(tao)(tao)管，適用(yong)于(yu)配電(dian)用(yong)，容量大都(dou)在(zai)(zai)1600KVA以下，電(dian)壓在(zai)(zai)10KV以下，也(ye)有個別做(zuo)到(dao)35KV電(dian)壓等級(ji)(ji)的。油式變(bian)壓器(qi)只能(neng)看到(dao)變(bian)壓器(qi)的外殼，大部(bu)分使(shi)用(yong)瓷套(tao)(tao)管，可用(yong)于(yu)高壓電(dian)路，可以從小到(dao)大做(zuo)到(dao)全部(bu)容量，電(dian)壓等級(ji)(ji)也(ye)做(zuo)到(dao)了所有電(dian)壓。

變壓器的等級怎么劃分

變(bian)壓(ya)(ya)器的(de)(de)電壓(ya)(ya)等(deng)級是固定的(de)(de)，常見的(de)(de)有1000KV、750KV、500KV、330KV、220KV、110KV、66KV、35KV、20KV、10KV、6KV等(deng)等(deng)。變(bian)壓(ya)(ya)器的(de)(de)容量等(deng)級按照(zhao)R10優先系數來計算的(de)(de)，可分(fen)為小型(xing)變(bian)壓(ya)(ya)器、中型(xing)變(bian)壓(ya)(ya)器、大型(xing)變(bian)壓(ya)(ya)器、特大型(xing)變(bian)壓(ya)(ya)器這四個等(deng)級。

變壓器知識課堂>>