控制繼電器的作用是什么？
控制繼電器簡介：
控(kong)(kong)制(zhi)繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)是一種(zhong)自(zi)動電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)，它適用于遠距離(li)接通(tong)和分斷交、直流小容量控(kong)(kong)制(zhi)電(dian)(dian)(dian)(dian)(dian)路(lu)，并在電(dian)(dian)(dian)(dian)(dian)力(li)驅(qu)動系統中供控(kong)(kong)制(zhi)、保護及信(xin)號轉換用。控(kong)(kong)制(zhi)繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的輸入(ru)量通(tong)常(chang)是電(dian)(dian)(dian)(dian)(dian)流、電(dian)(dian)(dian)(dian)(dian)壓等(deng)(deng)電(dian)(dian)(dian)(dian)(dian)量，也可(ke)以是溫度、壓力(li)、速度等(deng)(deng)非電(dian)(dian)(dian)(dian)(dian)量，輸出量則是觸點動作時發(fa)出的電(dian)(dian)(dian)(dian)(dian)信(xin)號或(huo)輸出電(dian)(dian)(dian)(dian)(dian)路(lu)的參數變化(hua)。繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的特點是當其(qi)輸入(ru)量的變化(hua)達到一定程序時，輸出量才會發(fa)生階躍性(xing)的變化(hua)。
控制繼電器特點：
控(kong)制繼電器是一種自動電器，它適用于(yu)遠距(ju)離接通(tong)和分斷(duan)交(jiao)、直流(liu)小容量控(kong)制電路(lu)，并(bing)在電力驅動系(xi)統中供控(kong)制、保護(hu)及信(xin)號轉換用。
繼電(dian)(dian)(dian)器的輸(shu)(shu)入量(liang)通常是(shi)(shi)電(dian)(dian)(dian)流(liu)、電(dian)(dian)(dian)壓等電(dian)(dian)(dian)量(liang)，也可以是(shi)(shi)溫度、壓力、速度等非(fei)電(dian)(dian)(dian)量(liang)，輸(shu)(shu)出量(liang)則是(shi)(shi)觸點動(dong)作時發出的電(dian)(dian)(dian)信(xin)號或輸(shu)(shu)出電(dian)(dian)(dian)路的參數變化(hua)。繼電(dian)(dian)(dian)器的特(te)點是(shi)(shi)當其輸(shu)(shu)入量(liang)的變化(hua)達到(dao)一定程序(xu)時，輸(shu)(shu)出量(liang)才會發生階躍性的變化(hua)。
控制繼電器的作用是什么？
1、電(dian)(dian)(dian)(dian)壓(ya)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)它是根據電(dian)(dian)(dian)(dian)路電(dian)(dian)(dian)(dian)壓(ya)變化而(er)動(dong)(dong)作的繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)，如用于(yu)電(dian)(dian)(dian)(dian)動(dong)(dong)機失壓(ya)、欠壓(ya)保護的交直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)壓(ya)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi);用于(yu)繞線式(shi)電(dian)(dian)(dian)(dian)動(dong)(dong)機制(zhi)動(dong)(dong)和(he)反(fan)轉控制(zhi)的交流(liu)(liu)電(dian)(dian)(dian)(dian)壓(ya)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi);用于(yu)直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)動(dong)(dong)機反(fan)轉及反(fan)接(jie)制(zhi)動(dong)(dong)的直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)壓(ya)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)等(deng)；
供增大控制電路(lu)中觸(chu)點(dian)數量或容量而(er)(er)用(yong)的，實(shi)質上也是(shi)電壓繼電器，僅(jin)僅(jin)是(shi)其動作值無(wu)需(xu)調(diao)整而(er)(er)已。
2、它是根據電(dian)路(lu)電(dian)流(liu)變化(hua)而動作的繼(ji)電(dian)器，被用(yong)于電(dian)動機(ji)和其他(ta)負載的過(guo)載及短路(lu)保護、以及直流(liu)電(dian)動機(ji)的磁場控制或失磁保護等(deng)；
3、這(zhe)是從(cong)接受信(xin)號到執(zhi)行元件動作有一定(ding)時(shi)間間隔(ge)的(de)繼(ji)電器(qi)，如起電動機時(shi)用以延時(shi)切換起動電阻、電動機能耗制動和生產(chan)過(guo)程(cheng)的(de)程(cheng)序(xu)控制等所(suo)用的(de)繼(ji)電器(qi)；
4、熱繼電(dian)器(qi)供交流電(dian)動機過載及斷相保護(hu)用的繼電(dian)器(qi)；
5、溫度(du)繼電器(qi)供各(ge)種(zhong)設備作(zuo)過熱保護或溫度(du)控制用的(de)繼電器(qi)；
6、速度(du)繼(ji)電器供電動機轉速和轉向變化監測(ce)的繼(ji)電器。
控制繼電器的選用：
選用時間控(kong)制繼電器時可從下列六個方(fang)面來考慮(lv)：
1、根據控制線路組成的(de)需要，確(que)定使用通電延時(shi)型或斷電延時(shi)型的(de)繼電器；
2、由于時(shi)間(jian)繼(ji)電器(qi)動作后的(de)復位時(shi)間(jian)應比固有動作時(shi)間(jian)長一些，否則將增大延(yan)時(shi)誤差甚至不能產生(sheng)延(yan)時(shi)，故組成重復延(yan)時(shi)線路(lu)或(huo)動作頻繁處，應特別注意；
3、凡對延時(shi)要(yao)求(qiu)不高(gao)處，宜采(cai)用價格較低的電磁阻尼(ni)式(shi)(shi)或氣囊式(shi)(shi)時(shi)間繼電器，反之則采(cai)用電動機式(shi)(shi)或晶體(ti)管式(shi)(shi)時(shi)間繼電器；
4、電(dian)源(yuan)電(dian)壓(ya)波(bo)動(dong)(dong)大(da)處，宜采用氣(qi)囊式或電(dian)動(dong)(dong)機式時間繼電(dian)器，電(dian)源(yuan)頻率變動(dong)(dong)大(da)處，忌用電(dian)動(dong)(dong)機式的產品；
5、應注意環境(jing)溫度的變化，凡變化大(da)處，不(bu)宜采(cai)用氣囊式時間繼電器；
6、對(dui)操作(zuo)頻率亦(yi)應注意，若(ruo)它過高則不僅(jin)影響電壽命，還會導致動(dong)作(zuo)失調。
