起動繼電器:保(bao)護線路,點火開關(guan)。
汽車(che)啟動繼電器的(de)作用:
1、主要(yao)是通過控(kong)(kong)制低(di)壓線(xian)路的電流(liu)來控(kong)(kong)制高壓線(xian)路的電流(liu),起(qi)到(dao)電流(liu)開關的作用(yong)。啟(qi)動繼電器是啟(qi)動系統組成部(bu)件之一,在汽車上主要(yao)作用(yong)為(wei)小電流(liu);
2、控(kong)制大電(dian)(dian)流方式啟動(dong)(dong)(dong)馬達轉動(dong)(dong)(dong),從而(er)帶動(dong)(dong)(dong)發電(dian)(dian)機內部磁(ci)(ci)電(dian)(dian)機轉子轉動(dong)(dong)(dong),給點火(huo)(huo)器(qi)輸入(ru)點火(huo)(huo)脈(mo)沖信號,使點火(huo)(huo)器(qi)產生電(dian)(dian)火(huo)(huo)花(hua),點燃汽缸(gang)內的混合燃氣并(bing)做功。繼電(dian)(dian)器(qi)屬于開關類,它是利用電(dian)(dian)磁(ci)(ci)原理、機電(dian)(dian)原理使接點閉合或(huo)斷開來驅(qu)動(dong)(dong)(dong)或(huo)控(kong)制相關電(dian)(dian)路(lu)的;
3、繼電(dian)器為一(yi)種控制器件,它(ta)有(you)受控系統(tong)(輸入(ru)(ru)回路(lu))和控制系統(tong)(輸出(chu)回路(lu))兩部(bu)分。當輸入(ru)(ru)量(liang)(電(dian)、磁、光(guang)、熱等物理(li)量(liang))達到(dao)(dao)(dao)某(mou)一(yi)定值(zhi)(zhi)時,輸出(chu)量(liang)躍(yue)變式地由零(ling)變化到(dao)(dao)(dao)一(yi)定值(zhi)(zhi)(或(huo)由一(yi)定值(zhi)(zhi)跳(tiao)變到(dao)(dao)(dao)零(ling)),從(cong)而實現(xian)對電(dian)路(lu)的控制、保護、調節(jie)和傳遞信息等目(mu)的。
啟動(dong)繼電(dian)器是單獨部件,其作(zuo)用(yong)(yong)(yong)是接通、斷(duan)開吸引線(xian)圈(quan)和(he)保持(chi)線(xian)圈(quan)電(dian)路。在電(dian)冰箱、空調器這類小(xiao)型制冷(leng)(leng)設備中,制冷(leng)(leng)壓縮機多采用(yong)(yong)(yong)單相(xiang)分相(xiang)式異步(bu)電(dian)動(dong)機,啟動(dong)繼電(dian)器的作(zuo)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)(zu),避免燒(shao)壞副繞組(zu)(zu)線(xian)圈(quan)。
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