起(qi)動繼電(dian)器:保(bao)護線路,點(dian)火開關。
汽車啟動繼電器的作用:
1、主要(yao)是通過控制低(di)壓(ya)線(xian)路的電(dian)流來控制高壓(ya)線(xian)路的電(dian)流,起到電(dian)流開關的作用。啟動(dong)繼電(dian)器(qi)是啟動(dong)系(xi)統組(zu)成部件之一,在汽(qi)車上主要(yao)作用為小電(dian)流;
2、控(kong)制大電流方式啟動(dong)馬(ma)達轉(zhuan)動(dong),從而帶動(dong)發電機(ji)(ji)內部(bu)磁(ci)電機(ji)(ji)轉(zhuan)子轉(zhuan)動(dong),給點火器輸(shu)入點火脈沖信號,使(shi)點火器產生電火花,點燃汽缸內的(de)混合燃氣并(bing)做功。繼電器屬(shu)于(yu)開關(guan)類(lei),它是利用電磁(ci)原(yuan)理(li)、機(ji)(ji)電原(yuan)理(li)使(shi)接點閉(bi)合或(huo)斷開來(lai)驅(qu)動(dong)或(huo)控(kong)制相關(guan)電路的(de);
3、繼電(dian)(dian)器(qi)為一(yi)種控(kong)制(zhi)器(qi)件,它有受控(kong)系統(輸(shu)(shu)(shu)入回路(lu))和(he)控(kong)制(zhi)系統(輸(shu)(shu)(shu)出(chu)回路(lu))兩(liang)部分。當(dang)輸(shu)(shu)(shu)入量(liang)(電(dian)(dian)、磁、光、熱等(deng)物理量(liang))達到(dao)某(mou)一(yi)定值(zhi)(zhi)時(shi),輸(shu)(shu)(shu)出(chu)量(liang)躍變式地由零變化到(dao)一(yi)定值(zhi)(zhi)(或由一(yi)定值(zhi)(zhi)跳(tiao)變到(dao)零),從而實現對電(dian)(dian)路(lu)的(de)控(kong)制(zhi)、保護、調節和(he)傳遞信息等(deng)目的(de)。
啟(qi)動(dong)(dong)繼(ji)電(dian)器(qi)是(shi)(shi)單獨部件,其作用是(shi)(shi)接通、斷開吸引線(xian)圈和保持(chi)線(xian)圈電(dian)路(lu)。在(zai)電(dian)冰箱、空調器(qi)這類小型制冷設備中,制冷壓縮機(ji)多采用單相(xiang)分相(xiang)式異(yi)步電(dian)動(dong)(dong)機(ji),啟(qi)動(dong)(dong)繼(ji)電(dian)器(qi)的作用是(shi)(shi)幫(bang)助電(dian)動(dong)(dong)機(ji)啟(qi)動(dong)(dong),啟(qi)動(dong)(dong)完成后自動(dong)(dong)斷開副繞(rao)組,避免燒壞副繞(rao)組線(xian)圈。
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