起(qi)動(dong)繼電(dian)器:保(bao)護線路,點火(huo)開(kai)關。
汽(qi)車啟動繼電(dian)器的作用:
1、主要是通(tong)過控制低(di)壓線路的(de)電(dian)流(liu)(liu)來控制高壓線路的(de)電(dian)流(liu)(liu),起到電(dian)流(liu)(liu)開(kai)關的(de)作(zuo)用。啟(qi)動繼電(dian)器是啟(qi)動系統組成部件之一,在汽車上主要作(zuo)用為小電(dian)流(liu)(liu);
2、控制(zhi)大電(dian)(dian)流方式啟動馬達轉動,從而帶動發電(dian)(dian)機(ji)(ji)內(nei)部磁電(dian)(dian)機(ji)(ji)轉子轉動,給點火器輸(shu)入(ru)點火脈(mo)沖信(xin)號(hao),使(shi)點火器產生電(dian)(dian)火花,點燃汽缸內(nei)的混合燃氣并做功(gong)。繼電(dian)(dian)器屬(shu)于開關類,它是利用電(dian)(dian)磁原理、機(ji)(ji)電(dian)(dian)原理使(shi)接點閉合或(huo)斷開來驅動或(huo)控制(zhi)相關電(dian)(dian)路的;
3、繼電(dian)器為一(yi)種(zhong)控制器件,它有受控系(xi)(xi)統(輸(shu)入回路(lu))和控制系(xi)(xi)統(輸(shu)出回路(lu))兩(liang)部分(fen)。當輸(shu)入量(電(dian)、磁、光(guang)、熱等物(wu)理量)達(da)到(dao)某一(yi)定(ding)值(zhi)時,輸(shu)出量躍變(bian)式地由零(ling)變(bian)化(hua)到(dao)一(yi)定(ding)值(zhi)(或由一(yi)定(ding)值(zhi)跳變(bian)到(dao)零(ling)),從而實現對電(dian)路(lu)的控制、保(bao)護、調(diao)節和傳遞信(xin)息等目的。
啟(qi)動(dong)繼(ji)電(dian)(dian)(dian)器(qi)是(shi)單獨部件,其作(zuo)用(yong)是(shi)接通、斷開吸引線(xian)圈和(he)保(bao)持線(xian)圈電(dian)(dian)(dian)路。在電(dian)(dian)(dian)冰箱、空(kong)調器(qi)這類小(xiao)型制冷設備中,制冷壓縮機(ji)多采用(yong)單相(xiang)分相(xiang)式異步電(dian)(dian)(dian)動(dong)機(ji),啟(qi)動(dong)繼(ji)電(dian)(dian)(dian)器(qi)的(de)作(zuo)用(yong)是(shi)幫助電(dian)(dian)(dian)動(dong)機(ji)啟(qi)動(dong),啟(qi)動(dong)完成后自(zi)動(dong)斷開副(fu)繞組(zu),避免燒壞副(fu)繞組(zu)線(xian)圈。
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