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行业知识:继电器正确使用方法技术分析

2017-06-02 15:41:00 字号: 分享

    1、继电器额定工作电压的选择

继(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)额(e)定(ding)工(gong)(gong)(gong)(gong)作(zuo)(zuo)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)是(shi)(shi)继(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)最主要的(de)(de)(de)一项技术参数。在(zai)使用继(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)时,应(ying)该首先(xian)考虑所(suo)(suo)在(zai)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(即继(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)线(xian)圈所(suo)(suo)在(zai)的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu))的(de)(de)(de)工(gong)(gong)(gong)(gong)作(zuo)(zuo)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya),继(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)的(de)(de)(de)额(e)定(ding)工(gong)(gong)(gong)(gong)作(zuo)(zuo)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)应(ying)等于所(suo)(suo)在(zai)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)的(de)(de)(de)工(gong)(gong)(gong)(gong)作(zuo)(zuo)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)。一般所(suo)(suo)在(zai)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)的(de)(de)(de)工(gong)(gong)(gong)(gong)作(zuo)(zuo)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)是(shi)(shi)继(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)额(e)定(ding)工(gong)(gong)(gong)(gong)作(zuo)(zuo)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)的(de)(de)(de)0.86。注(zhu)意所(suo)(suo)在(zai)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)的(de)(de)(de)工(gong)(gong)(gong)(gong)件电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)千万(wan)不能超(chao)过继(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)额(e)定(ding)工(gong)(gong)(gong)(gong)作(zuo)(zuo)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya),否(fou)则继(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)线(xian)圈容易烧(shao)毁。另外,有些(xie)集成电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu),例如NE555电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)是(shi)(shi)可以直(zhi)接驱动继(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)工(gong)(gong)(gong)(gong)作(zuo)(zuo)的(de)(de)(de),而(er)有些(xie)集成电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu),例如COMS电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)输出(chu)(chu)电(dian)(dian)(dian)(dian)(dian)(dian)流(liu)小,需要加(jia)一级晶(jing)体管放大(da)(da)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)方可驱动继(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi),这就应(ying)考虑晶(jing)体管输出(chu)(chu)电(dian)(dian)(dian)(dian)(dian)(dian)流(liu)应(ying)大(da)(da)于继(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)的(de)(de)(de)额(e)定(ding)工(gong)(gong)(gong)(gong)作(zuo)(zuo)电(dian)(dian)(dian)(dian)(dian)(dian)流(liu)。

2、触点负载的选择

触(chu)(chu)点(dian)(dian)(dian)负载是(shi)指触(chu)(chu)点(dian)(dian)(dian)的(de)(de)承受能(neng)(neng)力(li)。继电(dian)(dian)器(qi)的(de)(de)触(chu)(chu)点(dian)(dian)(dian)在转换时可承受一(yi)定的(de)(de)电(dian)(dian)压和电(dian)(dian)流(liu)(liu)(liu)。所以在使(shi)用(yong)继电(dian)(dian)器(qi)时,应(ying)考(kao)虑加在触(chu)(chu)点(dian)(dian)(dian)上的(de)(de)电(dian)(dian)压和通过触(chu)(chu)点(dian)(dian)(dian)的(de)(de)电(dian)(dian)流(liu)(liu)(liu)不能(neng)(neng)超过该继电(dian)(dian)器(qi)的(de)(de)触(chu)(chu)点(dian)(dian)(dian)负载能(neng)(neng)力(li)。例如,有一(yi)继电(dian)(dian)器(qi)的(de)(de)触(chu)(chu)点(dian)(dian)(dian)负载为(wei)28V(DC)×10A,表(biao)明该继电(dian)(dian)器(qi)触(chu)(chu)点(dian)(dian)(dian)只能(neng)(neng)工作(zuo)在直流(liu)(liu)(liu)电(dian)(dian)压为(wei)28V的(de)(de)电(dian)(dian)路上,触(chu)(chu)点(dian)(dian)(dian)电(dian)(dian)流(liu)(liu)(liu)为(wei)10A,超过28V或(huo)10A,会影响继电(dian)(dian)器(qi)正常(chang)使(shi)用(yong),甚(shen)至烧(shao)毁触(chu)(chu)点(dian)(dian)(dian)。

3、继电器线圈电源的选择

这是指(zhi)继电(dian)器线圈(quan)使用(yong)的(de)是直流电(dian)(DC)还(hai)是交流电(dian)(AC)。通常,初(chu)学(xue)者在进行(xing)电(dian)子(zi)制作活动中,都是采(cai)用(yong)电(dian)子(zi)线路,而电(dian)子(zi)线路往(wang)往(wang)采(cai)用(yong)直流电(dian)源供电(dian),所(suo)以(yi)必须是采(cai)用(yong)线圈(quan)是直流电(dian)压的(de)继电(dian)器。


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