√天堂资源在线中文8在线最新版_色YEYE香蕉凹凸视频在线观看_久久狠狠高潮亚洲精品_激情综合婷婷丁香五月

單相變壓器工(gong)作原理：當變(bian)(bian)壓(ya)(ya)(ya)(ya)器一(yi)(yi)(yi)次(ci)側施(shi)加交流(liu)電(dian)(dian)壓(ya)(ya)(ya)(ya)U1，流(liu)過一(yi)(yi)(yi)次(ci)繞(rao)(rao)組(zu)(zu)的電(dian)(dian)流(liu)為(wei)I1,則該電(dian)(dian)流(liu)在(zai)鐵芯(xin)中(zhong)會產生交變(bian)(bian)磁(ci)通，使一(yi)(yi)(yi)次(ci)繞(rao)(rao)組(zu)(zu)和二次(ci)繞(rao)(rao)組(zu)(zu)發生電(dian)(dian)磁(ci)聯系，根據電(dian)(dian)磁(ci)感應原理(li)，交變(bian)(bian)磁(ci)通穿過這兩個繞(rao)(rao)組(zu)(zu)就會感應出電(dian)(dian)動勢，其(qi)大小與繞(rao)(rao)組(zu)(zu)匝數以及主磁(ci)通的最大值成正比，繞(rao)(rao)組(zu)(zu)匝數多的一(yi)(yi)(yi)側電(dian)(dian)壓(ya)(ya)(ya)(ya)高，繞(rao)(rao)組(zu)(zu)匝數少(shao)的一(yi)(yi)(yi)側電(dian)(dian)壓(ya)(ya)(ya)(ya)低，當變(bian)(bian)壓(ya)(ya)(ya)(ya)器二次(ci)側開路，即變(bian)(bian)壓(ya)(ya)(ya)(ya)器空載時，一(yi)(yi)(yi)二次(ci)端(duan)電(dian)(dian)壓(ya)(ya)(ya)(ya)與一(yi)(yi)(yi)二次(ci)繞(rao)(rao)組(zu)(zu)匝數成正比，變(bian)(bian)壓(ya)(ya)(ya)(ya)器起(qi)到(dao)變(bian)(bian)換電(dian)(dian)壓(ya)(ya)(ya)(ya)的目的。

當變壓器二(er)次(ci)側接入(ru)負載(zai)后(hou)，在電(dian)(dian)動(dong)(dong)(dong)勢(shi)(shi)E2的作(zuo)用(yong)下，將(jiang)有二(er)次(ci)電(dian)(dian)流(liu)通過，該電(dian)(dian)流(liu)產(chan)生(sheng)的電(dian)(dian)動(dong)(dong)(dong)勢(shi)(shi)，也將(jiang)作(zuo)用(yong)在同(tong)一鐵芯上(shang)，起到反(fan)向去磁(ci)(ci)作(zuo)用(yong)，但因主(zhu)磁(ci)(ci)通取決(jue)于電(dian)(dian)源電(dian)(dian)壓，而U1基本保持不變，故一次(ci)繞(rao)組(zu)(zu)電(dian)(dian)流(liu)必將(jiang)自動(dong)(dong)(dong)增加一個分量產(chan)生(sheng)磁(ci)(ci)動(dong)(dong)(dong)勢(shi)(shi)F1,以抵(di)消二(er)次(ci)繞(rao)組(zu)(zu)電(dian)(dian)流(liu)所產(chan)生(sheng)的磁(ci)(ci)動(dong)(dong)(dong)勢(shi)(shi)F2,在一二(er)次(ci)繞(rao)組(zu)(zu)電(dian)(dian)流(liu)L1、L2作(zuo)用(yong)下，作(zuo)用(yong)在鐵芯上(shang)的總磁(ci)(ci)動(dong)(dong)(dong)勢(shi)(shi)（不計(ji)空(kong)載(zai)電(dian)(dian)流(liu)I0),F1+F2=0,

由于F1=I1N1,F2=I2N2,故(gu)

I1N1+I2N2=0,由式可知，I1和I2同相，所(suo)以

I1/I2=N2/N1=1/K

由式(shi)可知(zhi)，一二(er)(er)次電流(liu)比與一二(er)(er)次電壓比互為倒數，變壓器一二(er)(er)次繞組(zu)功率基本(ben)不變，（因變壓器自(zi)身損耗較其傳輸功率相(xiang)對較小(xiao)），二(er)(er)次繞組(zu)電流(liu)I2的大(da)(da)小(xiao)取決于負載(zai)的需(xu)(xu)要，所以一次繞組(zu)電流(liu)I1的大(da)(da)小(xiao)也取決于負載(zai)的需(xu)(xu)要，變壓器起到了(le)功率傳遞的作用。

   所謂變(bian)(bian)壓(ya)(ya)器(qi)就是要改變(bian)(bian)電壓(ya)(ya)，一般發(fa)(fa)電機輸(shu)出(chu)為(wei)三(san)(san)(san)(san)相正弦交流電，分(fen)為(wei)U相、V相、W相。發(fa)(fa)電機分(fen)三(san)(san)(san)(san)角形(xing)連(lian)接(jie)(jie)(jie)和星型連(lian)接(jie)(jie)(jie)：三(san)(san)(san)(san)角形(xing)連(lian)接(jie)(jie)(jie)就是將三(san)(san)(san)(san)項首尾(wei)(wei)連(lian)接(jie)(jie)(jie)起來輸(shu)出(chu)三(san)(san)(san)(san)條線幾十所謂的(de)三(san)(san)(san)(san)相間的(de)電壓(ya)(ya)有效值(zhi)為(wei)380V，星型是將三(san)(san)(san)(san)星的(de)首或尾(wei)(wei)連(lian)接(jie)(jie)(jie)起來輸(shu)出(chu)四條線分(fen)別(bie)為(wei)三(san)(san)(san)(san)相和地線，而三(san)(san)(san)(san)相的(de)任意(yi)一相和地線的(de)連(lian)接(jie)(jie)(jie)稱為(wei)單(dan)(dan)項電有效值(zhi)為(wei)220V用于(yu)單(dan)(dan)相電的(de)變(bian)(bian)壓(ya)(ya)器(qi)稱為(wei)單(dan)(dan)向變(bian)(bian)壓(ya)(ya)器(qi)，而連(lian)接(jie)(jie)(jie)于(yu)單(dan)(dan)相變(bian)(bian)壓(ya)(ya)器(qi)次級(ji)的(de)負載稱為(wei)單(dan)(dan)相負荷。