起(qi)動繼電(dian)器:保護線路,點火(huo)開關。
汽車啟動繼電器的作用(yong):
1、主(zhu)要是通過控(kong)制(zhi)低壓線(xian)路(lu)的(de)電(dian)流來控(kong)制(zhi)高壓線(xian)路(lu)的(de)電(dian)流,起到電(dian)流開關的(de)作用。啟動(dong)繼(ji)電(dian)器是啟動(dong)系統(tong)組(zu)成(cheng)部件之(zhi)一,在汽(qi)車上(shang)主(zhu)要作用為小電(dian)流;
2、控(kong)制(zhi)大(da)電(dian)(dian)(dian)流方式啟動(dong)馬達轉(zhuan)動(dong),從(cong)而帶動(dong)發電(dian)(dian)(dian)機(ji)內部(bu)磁(ci)電(dian)(dian)(dian)機(ji)轉(zhuan)子轉(zhuan)動(dong),給點(dian)火(huo)器輸入點(dian)火(huo)脈沖信(xin)號,使點(dian)火(huo)器產(chan)生電(dian)(dian)(dian)火(huo)花,點(dian)燃(ran)汽缸內的混(hun)合(he)燃(ran)氣并做功。繼電(dian)(dian)(dian)器屬于開關類,它是利用(yong)電(dian)(dian)(dian)磁(ci)原(yuan)理、機(ji)電(dian)(dian)(dian)原(yuan)理使接(jie)點(dian)閉合(he)或(huo)斷開來驅動(dong)或(huo)控(kong)制(zhi)相(xiang)關電(dian)(dian)(dian)路(lu)的;
3、繼電器為(wei)一(yi)種控(kong)(kong)制器件(jian),它有受控(kong)(kong)系統(tong)(輸(shu)入(ru)(ru)回路)和控(kong)(kong)制系統(tong)(輸(shu)出(chu)回路)兩部分。當(dang)輸(shu)入(ru)(ru)量(電、磁、光、熱等(deng)物理量)達到(dao)某(mou)一(yi)定(ding)值時,輸(shu)出(chu)量躍(yue)變(bian)式(shi)地由零(ling)(ling)變(bian)化到(dao)一(yi)定(ding)值(或由一(yi)定(ding)值跳變(bian)到(dao)零(ling)(ling)),從(cong)而實現對電路的控(kong)(kong)制、保護、調(diao)節和傳遞信(xin)息等(deng)目的。
啟動繼(ji)電(dian)器(qi)是(shi)單(dan)獨(du)部件,其(qi)作(zuo)用(yong)是(shi)接通、斷開吸引線(xian)圈和保持(chi)線(xian)圈電(dian)路(lu)。在電(dian)冰箱、空調器(qi)這類小型制冷(leng)設(she)備中,制冷(leng)壓縮機多采用(yong)單(dan)相分相式異步電(dian)動機,啟動繼(ji)電(dian)器(qi)的作(zuo)用(yong)是(shi)幫助電(dian)動機啟動,啟動完成后自動斷開副繞(rao)組(zu),避(bi)免燒壞副繞(rao)組(zu)線(xian)圈。
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