起(qi)動繼電器:保護線路(lu),點(dian)火開(kai)關(guan)。
汽(qi)車啟(qi)動繼電器的(de)作用:
1、主(zhu)要(yao)是(shi)通過控制(zhi)低壓(ya)(ya)線(xian)路(lu)(lu)的電流(liu)來控制(zhi)高壓(ya)(ya)線(xian)路(lu)(lu)的電流(liu),起到電流(liu)開關的作用。啟(qi)動繼電器(qi)是(shi)啟(qi)動系統組成部件之一,在汽車上(shang)主(zhu)要(yao)作用為小電流(liu);
2、控(kong)(kong)制(zhi)大電(dian)(dian)流方式啟動(dong)(dong)(dong)馬(ma)達(da)轉(zhuan)動(dong)(dong)(dong),從而帶(dai)動(dong)(dong)(dong)發(fa)電(dian)(dian)機內(nei)部磁電(dian)(dian)機轉(zhuan)子轉(zhuan)動(dong)(dong)(dong),給點火器輸(shu)入點火脈(mo)沖信(xin)號,使點火器產生(sheng)電(dian)(dian)火花,點燃(ran)汽缸內(nei)的混合(he)(he)燃(ran)氣并做功。繼電(dian)(dian)器屬于開(kai)關(guan)類,它是利(li)用電(dian)(dian)磁原理、機電(dian)(dian)原理使接點閉(bi)合(he)(he)或斷(duan)開(kai)來驅動(dong)(dong)(dong)或控(kong)(kong)制(zhi)相(xiang)關(guan)電(dian)(dian)路的;
3、繼電(dian)器為一種控(kong)制(zhi)(zhi)器件(jian),它(ta)有受控(kong)系統(輸入回路)和(he)控(kong)制(zhi)(zhi)系統(輸出回路)兩部(bu)分(fen)。當輸入量(liang)(電(dian)、磁(ci)、光、熱等物理量(liang))達(da)到(dao)某(mou)一定(ding)值(zhi)時,輸出量(liang)躍(yue)變(bian)(bian)式地由零(ling)變(bian)(bian)化到(dao)一定(ding)值(zhi)(或由一定(ding)值(zhi)跳變(bian)(bian)到(dao)零(ling)),從而實現對電(dian)路的控(kong)制(zhi)(zhi)、保護、調節和(he)傳(chuan)遞(di)信(xin)息等目(mu)的。
啟(qi)(qi)動(dong)繼(ji)電器(qi)是(shi)單(dan)獨(du)部件,其作用是(shi)接通、斷開吸引線(xian)(xian)圈和保持線(xian)(xian)圈電路。在(zai)電冰箱、空調器(qi)這類(lei)小型制冷(leng)設備(bei)中(zhong),制冷(leng)壓縮機(ji)多采用單(dan)相分相式異步電動(dong)機(ji),啟(qi)(qi)動(dong)繼(ji)電器(qi)的作用是(shi)幫助(zhu)電動(dong)機(ji)啟(qi)(qi)動(dong),啟(qi)(qi)動(dong)完成(cheng)后自動(dong)斷開副(fu)繞(rao)組,避免燒(shao)壞副(fu)繞(rao)組線(xian)(xian)圈。
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