起動繼電器:保護(hu)線路(lu),點火(huo)開關(guan)。
汽車(che)啟(qi)動繼電器(qi)的作用(yong):
1、主要是通過控(kong)制低壓線路(lu)的電(dian)流(liu)來控(kong)制高(gao)壓線路(lu)的電(dian)流(liu),起到(dao)電(dian)流(liu)開關的作用。啟(qi)動繼電(dian)器(qi)是啟(qi)動系(xi)統組成(cheng)部件之一,在汽(qi)車上主要作用為小(xiao)電(dian)流(liu);
2、控(kong)制大電(dian)(dian)流(liu)方式啟動(dong)馬達轉動(dong),從(cong)而帶動(dong)發電(dian)(dian)機內部磁電(dian)(dian)機轉子(zi)轉動(dong),給點(dian)(dian)火(huo)器輸入點(dian)(dian)火(huo)脈沖(chong)信號,使(shi)點(dian)(dian)火(huo)器產(chan)生(sheng)電(dian)(dian)火(huo)花,點(dian)(dian)燃(ran)汽(qi)缸內的(de)混合燃(ran)氣并做功。繼電(dian)(dian)器屬于(yu)開關(guan)類,它是(shi)利用(yong)電(dian)(dian)磁原理、機電(dian)(dian)原理使(shi)接點(dian)(dian)閉合或(huo)斷開來(lai)驅動(dong)或(huo)控(kong)制相關(guan)電(dian)(dian)路的(de);
3、繼電器為一種控(kong)制器件,它(ta)有受控(kong)系統(輸(shu)入(ru)回(hui)路(lu))和控(kong)制系統(輸(shu)出回(hui)路(lu))兩(liang)部分。當輸(shu)入(ru)量(電、磁、光、熱(re)等(deng)物理(li)量)達(da)到(dao)某一定值時,輸(shu)出量躍變式地由(you)零(ling)變化到(dao)一定值(或由(you)一定值跳變到(dao)零(ling)),從(cong)而實現對電路(lu)的控(kong)制、保護、調節和傳遞信息等(deng)目(mu)的。
啟動繼電(dian)(dian)器(qi)是(shi)單獨部件,其作用(yong)是(shi)接(jie)通、斷開(kai)吸引線(xian)圈和保持(chi)線(xian)圈電(dian)(dian)路。在(zai)電(dian)(dian)冰箱、空(kong)調器(qi)這類小(xiao)型制冷(leng)設備中,制冷(leng)壓縮機多(duo)采用(yong)單相(xiang)分相(xiang)式異(yi)步電(dian)(dian)動機,啟動繼電(dian)(dian)器(qi)的(de)作用(yong)是(shi)幫(bang)助電(dian)(dian)動機啟動,啟動完(wan)成后(hou)自動斷開(kai)副(fu)繞組,避(bi)免燒壞副(fu)繞組線(xian)圈。
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