起動繼電器:保護線路,點火開關。
汽(qi)車啟動繼電器的(de)作(zuo)用:
1、主要是通過控(kong)(kong)制低壓(ya)(ya)線路的電流來控(kong)(kong)制高壓(ya)(ya)線路的電流,起到電流開關(guan)的作用。啟動繼電器是啟動系統組成部件之(zhi)一,在汽(qi)車(che)上主要作用為小電流;
2、控(kong)制(zhi)大(da)電(dian)(dian)(dian)流方(fang)式啟動(dong)馬達轉動(dong),從而帶動(dong)發(fa)電(dian)(dian)(dian)機內部(bu)磁電(dian)(dian)(dian)機轉子轉動(dong),給(gei)點(dian)(dian)(dian)火(huo)器(qi)輸入(ru)點(dian)(dian)(dian)火(huo)脈沖信號,使點(dian)(dian)(dian)火(huo)器(qi)產生電(dian)(dian)(dian)火(huo)花,點(dian)(dian)(dian)燃汽缸內的(de)混合燃氣并做功。繼電(dian)(dian)(dian)器(qi)屬于開關類,它是利用電(dian)(dian)(dian)磁原理、機電(dian)(dian)(dian)原理使接(jie)點(dian)(dian)(dian)閉合或斷開來驅動(dong)或控(kong)制(zhi)相關電(dian)(dian)(dian)路的(de);
3、繼電(dian)(dian)器為一(yi)種控制(zhi)(zhi)器件,它有受(shou)控系統(輸(shu)(shu)入回(hui)路(lu))和(he)控制(zhi)(zhi)系統(輸(shu)(shu)出回(hui)路(lu))兩部分。當輸(shu)(shu)入量(電(dian)(dian)、磁、光、熱等(deng)物(wu)理量)達到某一(yi)定(ding)值時,輸(shu)(shu)出量躍變(bian)式(shi)地(di)由零變(bian)化(hua)到一(yi)定(ding)值(或由一(yi)定(ding)值跳變(bian)到零),從而實現對電(dian)(dian)路(lu)的控制(zhi)(zhi)、保護(hu)、調節和(he)傳遞信(xin)息等(deng)目的。
啟動(dong)繼電(dian)器(qi)是單獨部件,其(qi)作用(yong)(yong)(yong)是接通(tong)、斷(duan)開吸(xi)引線(xian)圈(quan)和保持線(xian)圈(quan)電(dian)路。在電(dian)冰箱、空調器(qi)這(zhe)類小型(xing)制冷設備中,制冷壓縮機多采用(yong)(yong)(yong)單相分(fen)相式異步電(dian)動(dong)機,啟動(dong)繼電(dian)器(qi)的作用(yong)(yong)(yong)是幫助電(dian)動(dong)機啟動(dong),啟動(dong)完成后(hou)自動(dong)斷(duan)開副繞組(zu),避免(mian)燒壞副繞組(zu)線(xian)圈(quan)。
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