變壓器工作原理

　　變(bian)(bian)壓器是變(bian)(bian)換交流(liu)電(dian)(dian)(dian)壓、電(dian)(dian)(dian)流(liu)和阻抗的器件，當初(chu)級(ji)(ji)(ji)線(xian)(xian)(xian)(xian)圈(quan)(quan)中(zhong)(zhong)(zhong)通(tong)有交流(liu)電(dian)(dian)(dian)流(liu)時，鐵芯(xin)（或磁(ci)芯(xin)）中(zhong)(zhong)(zhong)便(bian)產生交流(liu)磁(ci)通(tong)，使次級(ji)(ji)(ji)線(xian)(xian)(xian)(xian)圈(quan)(quan)中(zhong)(zhong)(zhong)感(gan)應出電(dian)(dian)(dian)壓（或電(dian)(dian)(dian)流(liu)）。變(bian)(bian)壓器由鐵芯(xin)（或磁(ci)芯(xin)）和線(xian)(xian)(xian)(xian)圈(quan)(quan)組成，線(xian)(xian)(xian)(xian)圈(quan)(quan)有兩個(ge)或兩個(ge)以上的繞組，其中(zhong)(zhong)(zhong)接(jie)電(dian)(dian)(dian)源的繞組叫(jiao)初(chu)級(ji)(ji)(ji)線(xian)(xian)(xian)(xian)圈(quan)(quan)，其余的繞組叫(jiao)次級(ji)(ji)(ji)線(xian)(xian)(xian)(xian)圈(quan)(quan)。在(zai)發電(dian)(dian)(dian)機中(zhong)(zhong)(zhong)，不管是線(xian)(xian)(xian)(xian)圈(quan)(quan)運(yun)(yun)動(dong)通(tong)過磁(ci)場或磁(ci)場運(yun)(yun)動(dong)通(tong)過固定線(xian)(xian)(xian)(xian)圈(quan)(quan)，均能在(zai)線(xian)(xian)(xian)(xian)圈(quan)(quan)中(zhong)(zhong)(zhong)感(gan)應電(dian)(dian)(dian)勢，此(ci)兩種情(qing)況，磁(ci)通(tong)的值均不變(bian)(bian)，但與線(xian)(xian)(xian)(xian)圈(quan)(quan)相交鏈的磁(ci)通(tong)數量卻有變(bian)(bian)動(dong)，這是互(hu)感(gan)應的原理。變(bian)(bian)壓器就是一種利用(yong)電(dian)(dian)(dian)磁(ci)互(hu)感(gan)應，變(bian)(bian)換電(dian)(dian)(dian)壓，電(dian)(dian)(dian)流(liu)和阻抗的器件。

　　變壓(ya)器(qi)工(gong)作原(yuan)(yuan)理(li)(li)具體(ti)是(shi)：當變壓(ya)器(qi)一(yi)(yi)(yi)次(ci)(ci)側施加(jia)交流(liu)電(dian)(dian)(dian)壓(ya)U1，流(liu)過(guo)一(yi)(yi)(yi)次(ci)(ci)繞(rao)組(zu)(zu)的(de)(de)電(dian)(dian)(dian)流(liu)為I1,則該電(dian)(dian)(dian)流(liu)在鐵芯(xin)中(zhong)會產生(sheng)交變磁(ci)通，使(shi)一(yi)(yi)(yi)次(ci)(ci)繞(rao)組(zu)(zu)和二次(ci)(ci)繞(rao)組(zu)(zu)發(fa)生(sheng)電(dian)(dian)(dian)磁(ci)聯(lian)系，根據電(dian)(dian)(dian)磁(ci)感應原(yuan)(yuan)理(li)(li)，交變磁(ci)通穿過(guo)這兩個繞(rao)組(zu)(zu)就會感應出電(dian)(dian)(dian)動勢，其大小與繞(rao)組(zu)(zu)匝數(shu)以及(ji)主磁(ci)通的(de)(de)最(zui)大值成正比，繞(rao)組(zu)(zu)匝數(shu)多的(de)(de)一(yi)(yi)(yi)側電(dian)(dian)(dian)壓(ya)高，繞(rao)組(zu)(zu)匝數(shu)少的(de)(de)一(yi)(yi)(yi)側電(dian)(dian)(dian)壓(ya)低，當變壓(ya)器(qi)二次(ci)(ci)側開路，即變壓(ya)器(qi)空(kong)載(zai)時，一(yi)(yi)(yi)二次(ci)(ci)端電(dian)(dian)(dian)壓(ya)與一(yi)(yi)(yi)二次(ci)(ci)繞(rao)組(zu)(zu)匝數(shu)成正比，即U1/U2=N1/N2,但初級與次(ci)(ci)級頻率(lv)保持(chi)一(yi)(yi)(yi)致，從(cong)而(er)實現電(dian)(dian)(dian)壓(ya)的(de)(de)變化。

變壓器價格

　　新英變壓器XY-211A  110元

　　景賽變壓器(qi)JS-300W-100V  138元(yuan)

　　公牛變壓器P1W  149.99元

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