起動繼電器:保護線(xian)路,點(dian)火開關。
汽(qi)車啟動繼電器的作(zuo)用:
1、主(zhu)要是(shi)通過控制(zhi)低壓線路(lu)的電(dian)(dian)流(liu)來控制(zhi)高(gao)壓線路(lu)的電(dian)(dian)流(liu),起(qi)到電(dian)(dian)流(liu)開關的作用。啟動繼電(dian)(dian)器(qi)是(shi)啟動系統(tong)組成(cheng)部(bu)件之(zhi)一(yi),在汽車上主(zhu)要作用為小(xiao)電(dian)(dian)流(liu);
2、控制(zhi)大(da)電(dian)(dian)流方式啟(qi)動(dong)(dong)馬達(da)轉(zhuan)動(dong)(dong),從而帶動(dong)(dong)發(fa)電(dian)(dian)機(ji)內(nei)部磁電(dian)(dian)機(ji)轉(zhuan)子轉(zhuan)動(dong)(dong),給點(dian)火器(qi)輸入(ru)點(dian)火脈(mo)沖信號,使(shi)(shi)點(dian)火器(qi)產生電(dian)(dian)火花,點(dian)燃汽(qi)缸(gang)內(nei)的混(hun)合燃氣并做功。繼(ji)電(dian)(dian)器(qi)屬(shu)于(yu)開(kai)關類,它是利用(yong)電(dian)(dian)磁原理、機(ji)電(dian)(dian)原理使(shi)(shi)接點(dian)閉合或斷開(kai)來驅(qu)動(dong)(dong)或控制(zhi)相關電(dian)(dian)路的;
3、繼電器為(wei)一(yi)種控(kong)(kong)制(zhi)器件(jian),它有受控(kong)(kong)系(xi)統(輸(shu)(shu)入(ru)回路)和(he)控(kong)(kong)制(zhi)系(xi)統(輸(shu)(shu)出(chu)回路)兩(liang)部分。當輸(shu)(shu)入(ru)量(liang)(電、磁、光、熱等物理(li)量(liang))達到(dao)(dao)某一(yi)定值(zhi)時(shi),輸(shu)(shu)出(chu)量(liang)躍變式地由零變化到(dao)(dao)一(yi)定值(zhi)(或由一(yi)定值(zhi)跳變到(dao)(dao)零),從而實(shi)現對(dui)電路的控(kong)(kong)制(zhi)、保護、調節和(he)傳遞(di)信息(xi)等目的。
啟動(dong)(dong)(dong)(dong)繼(ji)電(dian)(dian)器(qi)是單獨(du)部件,其作(zuo)用是接通(tong)、斷開吸(xi)引線圈和保持線圈電(dian)(dian)路(lu)。在電(dian)(dian)冰箱、空調器(qi)這類(lei)小型制冷設備中,制冷壓縮機(ji)(ji)(ji)多(duo)采用單相分(fen)相式異步電(dian)(dian)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji),啟動(dong)(dong)(dong)(dong)繼(ji)電(dian)(dian)器(qi)的作(zuo)用是幫助電(dian)(dian)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)啟動(dong)(dong)(dong)(dong),啟動(dong)(dong)(dong)(dong)完成后自動(dong)(dong)(dong)(dong)斷開副繞組,避免燒(shao)壞副繞組線圈。
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