繼電器的原理
繼(ji)(ji)電(dian)(dian)(dian)(dian)器的(de)(de)(de)(de)原(yuan)理很簡單,工作(zuo)時(shi),只要(yao)在繼(ji)(ji)電(dian)(dian)(dian)(dian)器的(de)(de)(de)(de)線圈(quan)(quan)兩端(duan)加(jia)上一(yi)定(ding)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓,線圈(quan)(quan)中就(jiu)會流(liu)過(guo)一(yi)定(ding)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu),從(cong)而產生電(dian)(dian)(dian)(dian)磁效應,銜(xian)鐵(tie)就(jiu)會在電(dian)(dian)(dian)(dian)磁力吸(xi)引的(de)(de)(de)(de)作(zuo)用(yong)下克服返回彈簧的(de)(de)(de)(de)拉(la)力吸(xi)向鐵(tie)芯,從(cong)而帶動銜(xian)鐵(tie)的(de)(de)(de)(de)動觸(chu)(chu)點與(yu)靜觸(chu)(chu)點(常開(kai)觸(chu)(chu)點)吸(xi)合。當線圈(quan)(quan)斷電(dian)(dian)(dian)(dian)后,電(dian)(dian)(dian)(dian)磁的(de)(de)(de)(de)吸(xi)力也隨之消(xiao)失(shi),銜(xian)鐵(tie)就(jiu)會在彈簧的(de)(de)(de)(de)反(fan)作(zuo)用(yong)力返回原(yuan)來(lai)的(de)(de)(de)(de)位置,使動觸(chu)(chu)點與(yu)原(yuan)來(lai)的(de)(de)(de)(de)靜觸(chu)(chu)點(常閉(bi)觸(chu)(chu)點)吸(xi)合。這(zhe)樣就(jiu)達到(dao)了(le)在電(dian)(dian)(dian)(dian)路中的(de)(de)(de)(de)導通、切斷的(de)(de)(de)(de)目的(de)(de)(de)(de)。
繼電器有什么用
1、代替小型接觸器
繼電(dian)器(qi)的觸(chu)點具有一定的帶(dai)負荷能力,當負載容量比較小時,可(ke)以(yi)用來替代小型接觸(chu)器(qi)使(shi)用,比如電(dian)動卷(juan)閘門和一些小家電(dian)的控(kong)制。這(zhe)樣的優點是不僅可(ke)以(yi)起(qi)到控(kong)制的目的,而且(qie)可(ke)以(yi)節省(sheng)空間,使(shi)電(dian)器(qi)的控(kong)制部分(fen)做得比較精致(zhi)。
2、增加接點容量
繼(ji)電器(qi)具有一定的(de)帶(dai)負載能力,同時其(qi)驅動所需要的(de)電流又很小,因此可(ke)以用繼(ji)電器(qi)來擴(kuo)大(da)(da)接點(dian)容量,通過(guo)繼(ji)電器(qi)來控制其(qi)他(ta)負載,能達到擴(kuo)大(da)(da)控制容量的(de)目的(de)。
3、轉換接點類型
在工業控制線路中,常常會出現這樣的情況,控制要求需要使用接觸器的常閉接點才能達到控制目的,但是接觸器本身所帶的常閉接點已經用完,無法完成控制任務。這時可以將一個繼電器與原來的接觸器線圈并聯,用繼電器品牌產品的(de)(de)常閉接點去控制相應的(de)(de)元件,轉(zhuan)換一下接點類(lei)型,達到所(suo)需要的(de)(de)控制目的(de)(de)。
4、當作開關
在一些控制(zhi)(zhi)線(xian)路中,一些電(dian)器(qi)(qi)元件的(de)通(tong)斷(duan)常常使用繼電(dian)器(qi)(qi),用其接點(dian)的(de)開閉來控制(zhi)(zhi),例如(ru)如(ru)彩電(dian)或顯示器(qi)(qi)中常見的(de)自動消(xiao)磁(ci)電(dian)路,三(san)極管(guan)控制(zhi)(zhi)繼電(dian)器(qi)(qi)的(de)通(tong)斷(duan),從而達到控制(zhi)(zhi)消(xiao)磁(ci)線(xian)圈通(tong)斷(duan)的(de)作用。
常見的繼電器有哪些
市面(mian)上的(de)(de)繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)產品有(you)很多,常見的(de)(de)有(you)電(dian)(dian)(dian)(dian)磁繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)、固態繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)、熱(re)敏干(gan)簧(huang)繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)、磁簧(huang)繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)、光繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)、時(shi)間繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)等(deng)等(deng)。不同(tong)繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)的(de)(de)作用(yong)有(you)很大(da)區別,例如時(shi)間繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)是用(yong)來(lai)(lai)實現延時(shi)控制(zhi)的(de)(de),電(dian)(dian)(dian)(dian)磁繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)是用(yong)來(lai)(lai)控制(zhi)電(dian)(dian)(dian)(dian)路通斷(duan)的(de)(de)。