電控柜(ju)的互感現象--互感電動(dong)勢

互(hu)感現象和(he)互(hu)感電動勢

以(yi)下(xia)(xia)是(shi)(shi)由我們(men)新壬環(huan)保的(de)(de)技術(shu)工程(cheng)師的(de)(de)試驗(yan)中(zhong)(zhong)證明，當電(dian)(dian)控柜內部電(dian)(dian)阻的(de)(de)阻值發生變化的(de)(de)時(shi)候，檢流(liu)(liu)計的(de)(de)指針會發生偏轉。這(zhe)是(shi)(shi)由于線(xian)圈(quan)中(zhong)(zhong)電(dian)(dian)流(liu)(liu)發生了(le)變化，從而引起磁(ci)通(tong)的(de)(de)變化，該磁(ci)通(tong)的(de)(de)變化會影響到下(xia)(xia)面一個(ge)線(xian)圈(quan)，使線(xian)圈(quan)中(zhong)(zhong)產(chan)生感(gan)應(ying)(ying)電(dian)(dian)動(dong)勢(shi)和感(gan)應(ying)(ying)電(dian)(dian)流(liu)(liu)。線(xian)圈(quan)中(zhong)(zhong)的(de)(de)強(qiang)度電(dian)(dian)流(liu)(liu)不改變，則線(xian)圈(quan)中(zhong)(zhong)不會產(chan)生感(gan)應(ying)(ying)電(dian)(dian)動(dong)勢(shi)和感(gan)應(ying)(ying)電(dian)(dian)流(liu)(liu)。

我們把這種(zhong)電控柜中(zhong)由一(yi)個線圈中(zhong)的電流發生(sheng)變化而在(zai)另一(yi)個線產(chan)生(sheng)電磁感(gan)應(ying)的現(xian)象叫(jiao)互(hu)(hu)感(gan)現(xian)象，簡稱(cheng)互(hu)(hu)感(gan)，有(you)互(hu)(hu)感(gan)產(chan)生(sheng)的感(gan)應(ying)電動勢稱(cheng)為互(hu)(hu)感(gan)電動勢。

互(hu)感(gan)電(dian)動勢的(de)(de)大(da)小正比于穿(chuan)過本線(xian)(xian)圈磁通(tong)的(de)(de)變(bian)化率，或正比于另一(yi)個(ge)線(xian)(xian)圈中電(dian)流的(de)(de)變(bian)化率，當(dang)兩個(ge)線(xian)(xian)圈互(hu)相平行且第(di)一(yi)個(ge)線(xian)(xian)圈的(de)(de)磁通(tong)變(bian)化全部影響到(dao)第(di)二個(ge)線(xian)(xian)圈時，互(hu)感(gan)電(dian)動勢最(zui)大(da)，當(dang)兩個(ge)線(xian)(xian)圈互(hu)相垂(chui)直(zhi)時，胡噶電(dian)動勢最(zui)小。