它是(shi)用(yong)来让信(xin)号在预置的(de)电(dian)(dian)(dian)平(ping)范围内，有选择地(di)传输一(yi)部分(fen)信(xin)号。大多(duo)数二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)都可作为限幅(fu)使用(yong)，但有些时(shi)候(hou)需要用(yong)到(dao)专门限幅(fu)二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)，如(ru)保护仪(yi)(yi)表(biao)时(shi)。[6]（3）稳(wen)(wen)压电(dian)(dian)(dian)路(lu)在稳(wen)(wen)压电(dian)(dian)(dian)路(lu)中(zhong)(zhong)(zhong)通(tong)常(chang)(chang)需要使用(yong)齐纳二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)，它是(shi)一(yi)种利(li)用(yong)特(te)殊工(gong)艺制造的(de)面结型硅把半导体(ti)二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)，这种特(te)殊二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)杂质(zhi)浓度(du)比(bi)较高(gao)，空间电(dian)(dian)(dian)荷区内的(de)电(dian)(dian)(dian)荷密度(du)大，容(rong)(rong)易(yi)形成强电(dian)(dian)(dian)场。当齐纳二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)两(liang)端反(fan)(fan)(fan)向(xiang)电(dian)(dian)(dian)压加到(dao)某一(yi)值，反(fan)(fan)(fan)向(xiang)电(dian)(dian)(dian)流(liu)急增，产(chan)生(sheng)反(fan)(fan)(fan)向(xiang)击穿(chuan)。[6]（4）变(bian)容(rong)(rong)电(dian)(dian)(dian)路(lu)在变(bian)容(rong)(rong)电(dian)(dian)(dian)路(lu)中(zhong)(zhong)(zhong)常(chang)(chang)用(yong)变(bian)容(rong)(rong)二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)来实(shi)现电(dian)(dian)(dian)路(lu)的(de)自动(dong)频率控制、调谐(xie)、调频以(yi)及(ji)扫(sao)描(miao)振荡等。[6]二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)工(gong)业产(chan)品应(ying)用(yong)经过多(duo)年来科学家(jia)们不懈努力，半导体(ti)二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)发(fa)(fa)光(guang)(guang)的(de)应(ying)用(yong)已逐步得到(dao)推广，发(fa)(fa)光(guang)(guang)二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)广应(ying)用(yong)于各种电(dian)(dian)(dian)子产(chan)品的(de)指示灯、光(guang)(guang)纤(xian)通(tong)信(xin)用(yong)光(guang)(guang)源、各种仪(yi)(yi)表(biao)的(de)指示器(qi)以(yi)及(ji)照明(ming)。发(fa)(fa)光(guang)(guang)二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)的(de)很(hen)多(duo)特(te)性(xing)是(shi)普通(tong)发(fa)(fa)光(guang)(guang)器(qi)件所(suo)无法比(bi)拟的(de)，主要具有特(te)点有：安全(quan)、高(gao)效率、环保、寿命长、响应(ying)快(kuai)、体(ti)积小、结构牢固(gu)。因此，发(fa)(fa)光(guang)(guang)二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)是(shi)一(yi)种符合绿色照明(ming)要求的(de)光(guang)(guang)源。[6]发(fa)(fa)光(guang)(guang)二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)在很(hen)多(duo)领域得到(dao)普遍应(ying)用(yong)，下面介绍几点其主要应(ying)用(yong)：（1）电(dian)(dian)(dian)子用(yong)品中(zhong)(zhong)(zhong)的(de)应(ying)用(yong)发(fa)(fa)光(guang)(guang)二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)在电(dian)(dian)(dian)子用(yong)品中(zhong)(zhong)(zhong)一(yi)般用(yong)作屏背光(guang)(guang)源或作显(xian)示、照明(ming)应(ying)用(yong)。美(mei)高(gao)森(sen)美(mei)二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)经销商找哪(na)家(jia)，推荐咨询上海寅涵智能科技。黑龙江(jiang)整流(liu)二(er)极(ji)(ji)(ji)(ji)(ji)管(guan)(guan)代理(li)货源

正向(xiang)(xiang)导电(dian)(dian)(dian)(dian)(dian)，反(fan)(fan)(fan)(fan)向(xiang)(xiang)不导电(dian)(dian)(dian)(dian)(dian)）晶体二(er)(er)极(ji)管(guan)是一(yi)(yi)个由p型半导体和n型半导体形(xing)成(cheng)(cheng)的(de)(de)p-n结，在(zai)(zai)(zai)其界(jie)(jie)面处(chu)两侧形(xing)成(cheng)(cheng)了空(kong)(kong)间(jian)电(dian)(dian)(dian)(dian)(dian)荷层，并(bing)且(qie)建(jian)(jian)有自(zi)建(jian)(jian)电(dian)(dian)(dian)(dian)(dian)场(chang)(chang)(chang)，当(dang)不存在(zai)(zai)(zai)外(wai)(wai)(wai)加电(dian)(dian)(dian)(dian)(dian)压(ya)(ya)时(shi)，因(yin)为(wei)p-n结两边载流(liu)子(zi)浓度(du)差引起的(de)(de)扩散(san)电(dian)(dian)(dian)(dian)(dian)流(liu)和自(zi)建(jian)(jian)电(dian)(dian)(dian)(dian)(dian)场(chang)(chang)(chang)引起的(de)(de)漂移电(dian)(dian)(dian)(dian)(dian)流(liu)相等而处(chu)于电(dian)(dian)(dian)(dian)(dian)平衡状态。当(dang)产(chan)(chan)生(sheng)正向(xiang)(xiang)电(dian)(dian)(dian)(dian)(dian)压(ya)(ya)偏(pian)置(zhi)时(shi)，外(wai)(wai)(wai)界(jie)(jie)电(dian)(dian)(dian)(dian)(dian)场(chang)(chang)(chang)与(yu)自(zi)建(jian)(jian)电(dian)(dian)(dian)(dian)(dian)场(chang)(chang)(chang)的(de)(de)互(hu)相抑消(xiao)作用使(shi)载流(liu)子(zi)的(de)(de)扩散(san)电(dian)(dian)(dian)(dian)(dian)流(liu)增(zeng)加引起了正向(xiang)(xiang)电(dian)(dian)(dian)(dian)(dian)流(liu)（也(ye)(ye)就是导电(dian)(dian)(dian)(dian)(dian)的(de)(de)原(yuan)因(yin)）。当(dang)产(chan)(chan)生(sheng)反(fan)(fan)(fan)(fan)向(xiang)(xiang)电(dian)(dian)(dian)(dian)(dian)压(ya)(ya)偏(pian)置(zhi)时(shi)，外(wai)(wai)(wai)界(jie)(jie)电(dian)(dian)(dian)(dian)(dian)场(chang)(chang)(chang)与(yu)自(zi)建(jian)(jian)电(dian)(dian)(dian)(dian)(dian)场(chang)(chang)(chang)进(jin)一(yi)(yi)步加强，形(xing)成(cheng)(cheng)在(zai)(zai)(zai)一(yi)(yi)定反(fan)(fan)(fan)(fan)向(xiang)(xiang)电(dian)(dian)(dian)(dian)(dian)压(ya)(ya)范围(wei)中(zhong)与(yu)反(fan)(fan)(fan)(fan)向(xiang)(xiang)偏(pian)置(zhi)电(dian)(dian)(dian)(dian)(dian)压(ya)(ya)值(zhi)无关的(de)(de)反(fan)(fan)(fan)(fan)向(xiang)(xiang)饱和电(dian)(dian)(dian)(dian)(dian)流(liu)I0（这也(ye)(ye)就是不导电(dian)(dian)(dian)(dian)(dian)的(de)(de)原(yuan)因(yin)）。当(dang)外(wai)(wai)(wai)加的(de)(de)反(fan)(fan)(fan)(fan)向(xiang)(xiang)电(dian)(dian)(dian)(dian)(dian)压(ya)(ya)高到(dao)一(yi)(yi)定程度(du)时(shi)，p-n结空(kong)(kong)间(jian)电(dian)(dian)(dian)(dian)(dian)荷层中(zhong)的(de)(de)电(dian)(dian)(dian)(dian)(dian)场(chang)(chang)(chang)强度(du)达到(dao)临界(jie)(jie)值(zhi)产(chan)(chan)生(sheng)载流(liu)子(zi)的(de)(de)倍增(zeng)过程，产(chan)(chan)生(sheng)大量电(dian)(dian)(dian)(dian)(dian)子(zi)空(kong)(kong)穴对，产(chan)(chan)生(sheng)了数值(zhi)很大的(de)(de)反(fan)(fan)(fan)(fan)向(xiang)(xiang)击(ji)(ji)(ji)穿(chuan)(chuan)电(dian)(dian)(dian)(dian)(dian)流(liu)，称(cheng)为(wei)二(er)(er)极(ji)管(guan)的(de)(de)击(ji)(ji)(ji)穿(chuan)(chuan)现象。二(er)(er)极(ji)管(guan)原(yuan)理(li)反(fan)(fan)(fan)(fan)向(xiang)(xiang)击(ji)(ji)(ji)穿(chuan)(chuan)编辑反(fan)(fan)(fan)(fan)向(xiang)(xiang)击(ji)(ji)(ji)穿(chuan)(chuan)按机理(li)分为(wei)齐纳(na)击(ji)(ji)(ji)穿(chuan)(chuan)和雪(xue)崩击(ji)(ji)(ji)穿(chuan)(chuan)两种情况。在(zai)(zai)(zai)高掺(chan)杂浓度(du)的(de)(de)情况下，因(yin)势垒区宽(kuan)度(du)很小，反(fan)(fan)(fan)(fan)向(xiang)(xiang)电(dian)(dian)(dian)(dian)(dian)压(ya)(ya)较(jiao)大时(shi)，破坏了势垒区内(nei)共价键结构(gou)，使(shi)价电(dian)(dian)(dian)(dian)(dian)子(zi)脱离共价键束缚，产(chan)(chan)生(sheng)电(dian)(dian)(dian)(dian)(dian)子(zi)-空(kong)(kong)穴对，致使(shi)电(dian)(dian)(dian)(dian)(dian)流(liu)急剧增(zeng)大，这种击(ji)(ji)(ji)穿(chuan)(chuan)称(cheng)为(wei)齐纳(na)击(ji)(ji)(ji)穿(chuan)(chuan)。如果掺(chan)杂浓度(du)较(jiao)低，势垒区宽(kuan)度(du)较(jiao)宽(kuan)，不容(rong)易产(chan)(chan)生(sheng)齐纳(na)击(ji)(ji)(ji)穿(chuan)(chuan)。雪(xue)崩击(ji)(ji)(ji)穿(chuan)(chuan)另(ling)一(yi)(yi)种击(ji)(ji)(ji)穿(chuan)(chuan)为(wei)雪(xue)崩击(ji)(ji)(ji)穿(chuan)(chuan)。当(dang)反(fan)(fan)(fan)(fan)向(xiang)(xiang)电(dian)(dian)(dian)(dian)(dian)压(ya)(ya)增(zeng)加到(dao)较(jiao)大数值(zhi)时(shi)。天津Microsemi美高森美二(er)(er)极(ji)管(guan)国内(nei)经销上海寅涵智能科(ke)技专业(ye)供应(ying)桥(qiao)式整流(liu)二(er)(er)极(ji)管(guan)PWB130AA40欢迎咨(zi)询(xun)。

所(suo)(suo)以(yi)依据这(zhei)一(yi)点(dian)(dian)可以(yi)确定这(zhei)一(yi)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)是为了(le)稳定电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中A点(dian)(dian)的(de)(de)(de)直流工(gong)作(zuo)(zuo)(zuo)电(dian)(dian)(dian)(dian)(dian)压(ya)。3）电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中有多只元(yuan)(yuan)器(qi)件(jian)(jian)时(shi)，一(yi)定要(yao)(yao)设法搞清楚实现(xian)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)功(gong)能的(de)(de)(de)主(zhu)要(yao)(yao)元(yuan)(yuan)器(qi)件(jian)(jian)，然后围(wei)绕(rao)它(ta)(ta)进(jin)(jin)行展开分(fen)析(xi)(xi)。分(fen)析(xi)(xi)中运(yun)用该(gai)元(yuan)(yuan)器(qi)件(jian)(jian)主(zhu)要(yao)(yao)特性(xing)(xing)，进(jin)(jin)行合理(li)(li)解(jie)释。二(er)极(ji)管温(wen)(wen)度(du)(du)(du)补偿电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)及故障处理(li)(li)众所(suo)(suo)周知，PN结导通(tong)后有一(yi)个(ge)约为（指硅(gui)材(cai)料PN结）的(de)(de)(de)压(ya)降(jiang)(jiang)(jiang)，同时(shi)PN结还(hai)有一(yi)个(ge)与温(wen)(wen)度(du)(du)(du)相关的(de)(de)(de)特性(xing)(xing)：PN结导通(tong)后的(de)(de)(de)压(ya)降(jiang)(jiang)(jiang)基(ji)本不(bu)(bu)变，但(dan)不(bu)(bu)是不(bu)(bu)变，PN结两端的(de)(de)(de)压(ya)降(jiang)(jiang)(jiang)随(sui)温(wen)(wen)度(du)(du)(du)升高(gao)而略有下降(jiang)(jiang)(jiang)，温(wen)(wen)度(du)(du)(du)愈(yu)高(gao)其下降(jiang)(jiang)(jiang)的(de)(de)(de)量(liang)愈(yu)多，当然PN结两端电(dian)(dian)(dian)(dian)(dian)压(ya)下降(jiang)(jiang)(jiang)量(liang)的(de)(de)(de)值对(dui)于，利用这(zhei)一(yi)特性(xing)(xing)可以(yi)构(gou)成(cheng)温(wen)(wen)度(du)(du)(du)补偿电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)。如图9-42所(suo)(suo)示是利用二(er)极(ji)管温(wen)(wen)度(du)(du)(du)特性(xing)(xing)构(gou)成(cheng)的(de)(de)(de)温(wen)(wen)度(du)(du)(du)补偿电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)。图9-42二(er)极(ji)管温(wen)(wen)度(du)(du)(du)补偿电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)对(dui)于初学者(zhe)来讲，看不(bu)(bu)懂电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中VT1等(deng)元(yuan)(yuan)器(qi)件(jian)(jian)构(gou)成(cheng)的(de)(de)(de)是一(yi)种(zhong)放大(da)器(qi)，这(zhei)对(dui)分(fen)析(xi)(xi)这(zhei)一(yi)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)工(gong)作(zuo)(zuo)(zuo)原(yuan)理(li)(li)不(bu)(bu)利。在(zai)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)分(fen)析(xi)(xi)中，熟悉VT1等(deng)元(yuan)(yuan)器(qi)件(jian)(jian)所(suo)(suo)构(gou)成(cheng)的(de)(de)(de)单元(yuan)(yuan)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)功(gong)能，对(dui)分(fen)析(xi)(xi)VD1工(gong)作(zuo)(zuo)(zuo)原(yuan)理(li)(li)有着积极(ji)意义。了(le)解(jie)了(le)单元(yuan)(yuan)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)(de)功(gong)能，一(yi)切电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)分(fen)析(xi)(xi)就可以(yi)围(wei)绕(rao)它(ta)(ta)进(jin)(jin)行展开，做(zuo)到有的(de)(de)(de)放矢、事(shi)半功(gong)倍。1．需(xu)要(yao)(yao)了(le)解(jie)的(de)(de)(de)深层次电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)工(gong)作(zuo)(zuo)(zuo)原(yuan)理(li)(li)分(fen)析(xi)(xi)这(zhei)一(yi)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)工(gong)作(zuo)(zuo)(zuo)原(yuan)理(li)(li)需(xu)要(yao)(yao)了(le)解(jie)下列两个(ge)深层次的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)原(yuan)理(li)(li)。1）VT1等(deng)构(gou)成(cheng)一(yi)种(zhong)放大(da)器(qi)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，对(dui)于放大(da)器(qi)而言(yan)要(yao)(yao)求它(ta)(ta)的(de)(de)(de)工(gong)作(zuo)(zuo)(zuo)稳定性(xing)(xing)好。

二(er)极(ji)管正负极(ji)判断方法(fa)如(ru)下：

1、对于普通二极管，可(ke)以看管体表面，有白线的(de)一端为负极。

2、对于(yu)发光二极(ji)管，引(yin)脚长的为(wei)正(zheng)极(ji)，短的为(wei)负极(ji)。

3、如果引脚(jiao)被剪得一样长了(le)，发(fa)光二极(ji)管(guan)管(guan)体内部金属极(ji)较小的是正(zheng)极(ji)，大的片状(zhuang)的是负极(ji)。

4、如果(guo)看不清，也(ye)可打(da)开(kai)万(wan)用(yong)表(biao)，将旋钮拨到通断档，将红黑(hei)表(biao)笔分(fen)别(bie)接在两个引(yin)脚。若有读数，则(ze)(ze)红表(biao)笔一(yi)端为(wei)(wei)正(zheng)极(ji)(ji)，若读数为(wei)(wei)1，则(ze)(ze)黑(hei)表(biao)笔一(yi)端为(wei)(wei)正(zheng)极(ji)(ji)。二(er)(er)极(ji)(ji)管(guan)是用(yong)半(ban)导体材(cai)料（硅、硒、锗(zhe)等）制成的一(yi)种电子(zi)器(qi)件(jian)，它具有单向导电性能(neng)，即给二(er)(er)极(ji)(ji)管(guan)阳(yang)极(ji)(ji)加上正(zheng)向电压(ya)时，二(er)(er)极(ji)(ji)管(guan)导通。当(dang)给阳(yang)极(ji)(ji)和阴极(ji)(ji)加上反向电压(ya)时，二(er)(er)极(ji)(ji)管(guan)截止。

因(yin)此，二极管(guan)(guan)的(de)(de)导(dao)(dao)通(tong)和(he)截止(zhi)，则相当于开关的(de)(de)接通(tong)与断开。二极管(guan)(guan)结构构成二极管(guan)(guan)就是由(you)一个PN结加上相应(ying)的(de)(de)电极引线(xian)及管(guan)(guan)壳封(feng)装而(er)成的(de)(de)，采(cai)用不同的(de)(de)掺杂(za)工艺。通(tong)过扩散作(zuo)用，将P型半(ban)(ban)导(dao)(dao)体与N型半(ban)(ban)导(dao)(dao)体制作(zuo)在同一块半(ban)(ban)导(dao)(dao)体（通(tong)常是硅或锗）基片上，在它们的(de)(de)交(jiao)界面就形成空(kong)间电荷区称为PN结。上海(hai)寅涵智(zhi)能科技是艾赛斯(si)可控(kong)硅二极管(guan)(guan)专业进口厂商，种类(lei)齐(qi)全，价格(ge)优惠。

二极管是什么类型？

二极(ji)管是一(yi)种电子元件，它具有两种工作(zuo)状态：正向(xiang)(xiang)(xiang)偏(pian)置(zhi)和反向(xiang)(xiang)(xiang)偏(pian)置(zhi)。在正向(xiang)(xiang)(xiang)偏(pian)置(zhi)状态下，二极(ji)管允许电流(liu)通(tong)过(guo)；而在反向(xiang)(xiang)(xiang)偏(pian)置(zhi)状态下，二极(ji)管阻止(zhi)电流(liu)通(tong)过(guo)。这(zhei)种单向(xiang)(xiang)(xiang)导(dao)电特性使得二极(ji)管成为电子电路中(zhong)的基本构建(jian)模块(kuai)之一(yi)。

二(er)极管(guan)有多(duo)种类型，以下(xia)是一些常见(jian)的二(er)极管(guan)类型：

1.整(zheng)流(liu)二极管：这类二极管主要用于整(zheng)流(liu)，即将交(jiao)流(liu)电（AC）转换(huan)为直流(liu)电（DC）。

2.齐(qi)纳二(er)极(ji)管(guan)(guan)：齐(qi)纳二(er)极(ji)管(guan)(guan)是一(yi)种限(xian)压(ya)二(er)极(ji)管(guan)(guan)，用于稳定电压(ya)。当(dang)施(shi)加在(zai)二(er)极(ji)管(guan)(guan)两端的电压(ya)达到某一(yi)特定值时，齐(qi)纳二(er)极(ji)管(guan)(guan)将开始导通。

3.开(kai)关二(er)极(ji)管：开(kai)关二(er)极(ji)管是(shi)一种高(gao)速开(kai)关元件，用(yong)于高(gao)速开(kai)关应用(yong)。它(ta)们具有较低的电容(rong)和快(kuai)速的开(kai)关速度，适合高(gao)频应用(yong)。

4.肖特(te)基二(er)极(ji)(ji)(ji)(ji)管(guan)(guan)：肖特(te)基二(er)极(ji)(ji)(ji)(ji)管(guan)(guan)是一种(zhong)低(di)(di)压降二(er)极(ji)(ji)(ji)(ji)管(guan)(guan)，具(ju)有(you)快速(su)(su)开(kai)关速(su)(su)度和(he)(he)(he)较低(di)(di)的(de)正(zheng)向电压降。它(ta)(ta)们(men)通常用于高频(pin)开(kai)关应(ying)用和(he)(he)(he)低(di)(di)压应(ying)用。5.发光(guang)(guang)(guang)二(er)极(ji)(ji)(ji)(ji)管(guan)(guan)（LED）：发光(guang)(guang)(guang)二(er)极(ji)(ji)(ji)(ji)管(guan)(guan)是一种(zhong)特(te)殊类型的(de)二(er)极(ji)(ji)(ji)(ji)管(guan)(guan)，当电流通过时，它(ta)(ta)会发出光(guang)(guang)(guang)线。它(ta)(ta)们(men)广泛应(ying)用于显示器(qi)、指(zhi)示灯和(he)(he)(he)照明设备(bei)。硅功率开(kai)关二(er)极(ji)(ji)(ji)(ji)管(guan)(guan)经销商找哪家，推(tui)荐咨询上海(hai)寅涵智能科(ke)技(ji)。宁夏semikron西门康二(er)极(ji)(ji)(ji)(ji)管(guan)(guan)半(ban)导体模块

上海寅涵智能科(ke)技经销各类(lei)型号艾赛(sai)斯二(er)极管，欢迎联系(xi)购买。黑龙江整流二(er)极管代理货源

所(suo)以它在(zai)断电(dian)(dian)(dian)(dian)(dian)时会(hui)产生(sheng)电(dian)(dian)(dian)(dian)(dian)压(ya)很大的(de)(de)(de)(de)(de)(de)反(fan)向(xiang)电(dian)(dian)(dian)(dian)(dian)动(dong)(dong)(dong)势(shi)，会(hui)击穿(chuan)继电(dian)(dian)(dian)(dian)(dian)器(qi)的(de)(de)(de)(de)(de)(de)驱动(dong)(dong)(dong)三极(ji)(ji)(ji)管(guan)(guan)(guan)，为(wei)(wei)(wei)此要(yao)在(zai)继电(dian)(dian)(dian)(dian)(dian)器(qi)驱动(dong)(dong)(dong)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中(zhong)设(she)置二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)保(bao)(bao)(bao)护(hu)(hu)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，以保(bao)(bao)(bao)护(hu)(hu)继电(dian)(dian)(dian)(dian)(dian)器(qi)驱动(dong)(dong)(dong)管(guan)(guan)(guan)。如(ru)图(tu)9-53所(suo)示(shi)(shi)是(shi)继电(dian)(dian)(dian)(dian)(dian)器(qi)驱动(dong)(dong)(dong)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中(zhong)的(de)(de)(de)(de)(de)(de)二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)保(bao)(bao)(bao)护(hu)(hu)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中(zhong)的(de)(de)(de)(de)(de)(de)J1是(shi)继电(dian)(dian)(dian)(dian)(dian)器(qi)，VD1是(shi)驱动(dong)(dong)(dong)管(guan)(guan)(guan)VT1的(de)(de)(de)(de)(de)(de)保(bao)(bao)(bao)护(hu)(hu)二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)，R1和(he)C1构成继电(dian)(dian)(dian)(dian)(dian)器(qi)内(nei)部开(kai)关触点的(de)(de)(de)(de)(de)(de)消火花电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)。1．电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)工作(zuo)(zuo)(zuo)原理(li)分析继电(dian)(dian)(dian)(dian)(dian)器(qi)内(nei)部有(you)一组线(xian)(xian)(xian)(xian)圈(quan)，如(ru)图(tu)9-54所(suo)示(shi)(shi)是(shi)等效(xiao)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，在(zai)继电(dian)(dian)(dian)(dian)(dian)器(qi)断电(dian)(dian)(dian)(dian)(dian)前(qian)(qian)，流(liu)(liu)过(guo)(guo)继电(dian)(dian)(dian)(dian)(dian)器(qi)线(xian)(xian)(xian)(xian)圈(quan)L1的(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)方(fang)向(xiang)为(wei)(wei)(wei)从上(shang)而下，在(zai)断电(dian)(dian)(dian)(dian)(dian)后线(xian)(xian)(xian)(xian)圈(quan)产生(sheng)反(fan)向(xiang)电(dian)(dian)(dian)(dian)(dian)动(dong)(dong)(dong)势(shi)阻碍这(zhei)一电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)变化(hua)，即产生(sheng)一个从上(shang)而过(guo)(guo)的(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，见图(tu)中(zhong)虚线(xian)(xian)(xian)(xian)所(suo)示(shi)(shi)。根(gen)据前(qian)(qian)面(mian)介绍的(de)(de)(de)(de)(de)(de)线(xian)(xian)(xian)(xian)圈(quan)两端(duan)反(fan)向(xiang)电(dian)(dian)(dian)(dian)(dian)动(dong)(dong)(dong)势(shi)判(pan)别方(fang)法(fa)可知，反(fan)向(xiang)电(dian)(dian)(dian)(dian)(dian)动(dong)(dong)(dong)势(shi)在(zai)线(xian)(xian)(xian)(xian)圈(quan)L1上(shang)的(de)(de)(de)(de)(de)(de)极(ji)(ji)(ji)性(xing)为(wei)(wei)(wei)下正上(shang)负，见图(tu)中(zhong)所(suo)示(shi)(shi)。如(ru)表9-44所(suo)示(shi)(shi)是(shi)这(zhei)一电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中(zhong)保(bao)(bao)(bao)护(hu)(hu)二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)工作(zuo)(zuo)(zuo)原理(li)说(shuo)(shuo)明(ming)。表9-44保(bao)(bao)(bao)护(hu)(hu)二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)工作(zuo)(zuo)(zuo)原理(li)说(shuo)(shuo)明(ming)2．故(gu)(gu)障检(jian)测方(fang)法(fa)和(he)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)故(gu)(gu)障分析对于这(zhei)一电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中(zhong)的(de)(de)(de)(de)(de)(de)保(bao)(bao)(bao)护(hu)(hu)二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)不(bu)能(neng)采用测量(liang)二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)两端(duan)直流(liu)(liu)电(dian)(dian)(dian)(dian)(dian)压(ya)降的(de)(de)(de)(de)(de)(de)方(fang)法(fa)来(lai)(lai)判(pan)断检(jian)测故(gu)(gu)障，也不(bu)能(neng)采用在(zai)路(lu)(lu)(lu)测量(liang)二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)正向(xiang)和(he)反(fan)向(xiang)电(dian)(dian)(dian)(dian)(dian)阻的(de)(de)(de)(de)(de)(de)方(fang)法(fa)，因为(wei)(wei)(wei)这(zhei)一二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)两端(duan)并联(lian)着继电(dian)(dian)(dian)(dian)(dian)器(qi)线(xian)(xian)(xian)(xian)圈(quan)，这(zhei)圈(quan)的(de)(de)(de)(de)(de)(de)直流(liu)(liu)电(dian)(dian)(dian)(dian)(dian)阻很小，所(suo)以无法(fa)通过(guo)(guo)测量(liang)电(dian)(dian)(dian)(dian)(dian)压(ya)降的(de)(de)(de)(de)(de)(de)方(fang)法(fa)来(lai)(lai)判(pan)断二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)质(zhi)量(liang)。应该采用代替(ti)检(jian)查的(de)(de)(de)(de)(de)(de)方(fang)法(fa)。当(dang)保(bao)(bao)(bao)护(hu)(hu)二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)开(kai)路(lu)(lu)(lu)时，对继电(dian)(dian)(dian)(dian)(dian)器(qi)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)工作(zuo)(zuo)(zuo)状态没有(you)大的(de)(de)(de)(de)(de)(de)影响。黑龙江整流(liu)(liu)二(er)(er)极(ji)(ji)(ji)管(guan)(guan)(guan)代理(li)货源

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