【閃(shan)光(guang)繼電(dian)器(qi)】閃(shan)光(guang)繼電(dian)器(qi)工作原(yuan)理 閃(shan)光(guang)繼電(dian)器(qi)怎么(me)接(jie)線
閃光繼電器是一種當輸入(ru)(ru)(ru)(ru)量(電(dian)(dian)、磁(ci)、聲(sheng)、光(guang)、熱)達(da)到(dao)(dao)(dao)(dao)一定值(zhi)(zhi)時,輸出(chu)量將發生跳(tiao)躍式變(bian)化的(de)自動(dong)控制器件。繼(ji)電(dian)(dian)器的(de)繼(ji)電(dian)(dian)特(te)性繼(ji)電(dian)(dian)器的(de)輸入(ru)(ru)(ru)(ru)信號(hao)x從(cong)零連續增加達(da)到(dao)(dao)(dao)(dao)銜鐵開(kai)(kai)始(shi)吸合時的(de)動(dong)作(zuo)(zuo)值(zhi)(zhi)xx,繼(ji)電(dian)(dian)器的(de)輸出(chu)信號(hao)立刻從(cong)y=0跳(tiao)躍到(dao)(dao)(dao)(dao)y=ym,即常開(kai)(kai)觸(chu)(chu)點從(cong)斷到(dao)(dao)(dao)(dao)通。一旦觸(chu)(chu)點閉合,輸入(ru)(ru)(ru)(ru)量x繼(ji)續增大(da),輸出(chu)信號(hao)y將不再起變(bian)化。當輸入(ru)(ru)(ru)(ru)量x從(cong)某一大(da)于xx值(zhi)(zhi)下降到(dao)(dao)(dao)(dao)xf,繼(ji)電(dian)(dian)器開(kai)(kai)始(shi)釋(shi)放(fang),常開(kai)(kai)觸(chu)(chu)點斷開(kai)(kai),我們把繼(ji)電(dian)(dian)器的(de)這種特(te)性叫做繼(ji)電(dian)(dian)特(te)性,也叫繼(ji)電(dian)(dian)器的(de)輸入(ru)(ru)(ru)(ru)-輸出(chu)特(te)性。釋(shi)放(fang)值(zhi)(zhi)xf與(yu)動(dong)作(zuo)(zuo)值(zhi)(zhi)xx的(de)比值(zhi)(zhi)叫做反饋系(xi)數。
閃光繼電器怎么接線
閃(shan)光燈(deng)繼電(dian)器L接燈(deng),B接電(dian)源,E接地。
汽車常(chang)見的閃光(guang)繼電器(qi)有三類:
1、電容式(shi)閃光器;
2、翼片式閃(shan)光器;
3、電子式閃光器。
閃光(guang)器的三個引腳定義(yi):
B:電源(yuan)端,與電源(yuan)(+)連接(jie);
L:閃(shan)光器控制端,與燈(+)連接,燈(-)接搭鐵;
E:搭(da)鐵端,與(yu)車體、電(dian)源(-)連接。
閃光繼電器工作原理
電(dian)子式閃光器(qi)(qi)利用三(san)極管(guan)的(de)(de)開關特性,電(dian)容器(qi)(qi)的(de)(de)充、放電(dian)延(yan)時特性,控制繼(ji)電(dian)器(qi)(qi)線圈的(de)(de)通、斷電(dian),接通和斷開觸(chu)點,使轉向信號燈閃爍。
電子式閃光器由于其工作可靠,使用壽(shou)命(ming)長,目前(qian)在汽車轉向燈系統中(zhong)廣泛使用。
電(dian)子式閃光器分為有(you)觸(chu)點(dian)和(he)無觸(chu)點(dian)、集成電(dian)路(lu)和(he)晶體管等多種(zhong)形式。
電子(zi)閃光器的三個(ge)管腳:
B:電源端;
L:閃光(guang)器控制端;
E:搭鐵端;
充電(dian)電(dian)路:蓄電(dian)池正極電(dian)源開關SW接線(xian)柱B V的發射極e、基極b
電容(rong)器C電阻R3接(jie)線柱(zhu)S轉向(xiang)燈開光K右轉向(xiang)信號燈
搭鐵(tie)蓄電(dian)池負(fu)極。
·汽車向右轉彎(wan)時,接通電源開關SW
和(he)轉向燈開關K,電流(liu)由蓄(xu)電池正極
接線(xian)柱B電(dian)阻R1繼電(dian)器的(de)常閉觸點J
接線(xian)柱S轉向燈(deng)開關K右轉向燈(deng)搭鐵
蓄電池負極(ji),形成回路,右轉向燈(deng)亮。
當電(dian)流通過電(dian)阻(zu)R1時,在電(dian)阻(zu)R1上(shang)產(chan)生電(dian)壓降,三級管VT因正向
偏壓而導通,集電(dian)極電(dian)流通過(guo)繼電(dian)器(qi)線圈J,使(shi)繼電(dian)器(qi)的常閉觸點立即打
開右轉(zhuan)向信號(hao)燈隨之熄滅。
晶體三極管V導(dao)通的同時,V的基(ji)極電流向電容(rong)器C充電。
在充(chong)電(dian)(dian)(dian)過程中,隨著電(dian)(dian)(dian)容器電(dian)(dian)(dian)荷積累,充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流逐漸減(jian)小(xiao),三極管的(de)(de)(de)集電(dian)(dian)(dian)極電(dian)(dian)(dian)流Ic也隨之減(jian)小(xiao),當(dang)此電(dian)(dian)(dian)流不足以維持銜(xian)鐵的(de)(de)(de)吸合而釋放時,繼電(dian)(dian)(dian)器的(de)(de)(de)觸點又重新閉合,轉向燈(deng)又再(zai)次(ci)發亮。
這時(shi)電(dian)(dian)容器C通過電(dian)(dian)阻(zu)(zu)R2、繼電(dian)(dian)器的常閉(bi)觸點(dian)J,電(dian)(dian)阻(zu)(zu)R3放電(dian)(dian)。放電(dian)(dian)電(dian)(dian)流(liu)(liu)在R2上產(chan)生的電(dian)(dian)壓(ya)降為三極(ji)管(guan)提(ti)供反向偏壓(ya),加(jia)速三極(ji)管(guan)的截止。當放電(dian)(dian)電(dian)(dian)流(liu)(liu)接近零時(shi),R1上的電(dian)(dian)壓(ya)降為三極(ji)管(guan)提(ti)供正向的偏壓(ya)使其(qi)導(dao)通。
這樣,電容器(qi)不(bu)(bu)斷充電和(he)放電,三極管也就不(bu)(bu)斷導(dao)通與截止(zhi),控制繼電器(qi)觸點反復打開(kai)、閉合,使轉向燈閃爍(shuo)。