它是(shi)用(yong)(yong)(yong)(yong)(yong)(yong)来让信(xin)号在预置的(de)电(dian)(dian)(dian)平范围内，有选择地(di)传输一部分信(xin)号。大多(duo)数二(er)(er)极(ji)管(guan)都可(ke)作(zuo)为(wei)限(xian)幅使用(yong)(yong)(yong)(yong)(yong)(yong)，但有些时候需要(yao)用(yong)(yong)(yong)(yong)(yong)(yong)到(dao)专(zhuan)门限(xian)幅二(er)(er)极(ji)管(guan)，如保护仪表(biao)时。[6]（3）稳压(ya)电(dian)(dian)(dian)路在稳压(ya)电(dian)(dian)(dian)路中(zhong)通(tong)常需要(yao)使用(yong)(yong)(yong)(yong)(yong)(yong)齐纳二(er)(er)极(ji)管(guan)，它是(shi)一种利用(yong)(yong)(yong)(yong)(yong)(yong)特殊工(gong)艺制(zhi)造的(de)面结型硅(gui)把(ba)半导体二(er)(er)极(ji)管(guan)，这种特殊二(er)(er)极(ji)管(guan)杂质浓度(du)(du)比较高，空(kong)间电(dian)(dian)(dian)荷(he)区内的(de)电(dian)(dian)(dian)荷(he)密度(du)(du)大，容易形成强电(dian)(dian)(dian)场。当齐纳二(er)(er)极(ji)管(guan)两端反向(xiang)电(dian)(dian)(dian)压(ya)加到(dao)某一值，反向(xiang)电(dian)(dian)(dian)流急增(zeng)，产生反向(xiang)击(ji)穿。[6]（4）变(bian)容电(dian)(dian)(dian)路在变(bian)容电(dian)(dian)(dian)路中(zhong)常用(yong)(yong)(yong)(yong)(yong)(yong)变(bian)容二(er)(er)极(ji)管(guan)来实现电(dian)(dian)(dian)路的(de)自动频率(lv)控制(zhi)、调谐、调频以及扫描振荡等。[6]二(er)(er)极(ji)管(guan)工(gong)业产品(pin)(pin)应用(yong)(yong)(yong)(yong)(yong)(yong)经过多(duo)年来科学(xue)家(jia)们不懈努力(li)，半导体二(er)(er)极(ji)管(guan)发(fa)(fa)光(guang)(guang)(guang)(guang)(guang)的(de)应用(yong)(yong)(yong)(yong)(yong)(yong)已(yi)逐步得(de)到(dao)推广，发(fa)(fa)光(guang)(guang)(guang)(guang)(guang)二(er)(er)极(ji)管(guan)广应用(yong)(yong)(yong)(yong)(yong)(yong)于各种电(dian)(dian)(dian)子(zi)(zi)产品(pin)(pin)的(de)指示灯、光(guang)(guang)(guang)(guang)(guang)纤(xian)通(tong)信(xin)用(yong)(yong)(yong)(yong)(yong)(yong)光(guang)(guang)(guang)(guang)(guang)源(yuan)(yuan)、各种仪表(biao)的(de)指示器以及照(zhao)(zhao)明。发(fa)(fa)光(guang)(guang)(guang)(guang)(guang)二(er)(er)极(ji)管(guan)的(de)很(hen)多(duo)特性是(shi)普通(tong)发(fa)(fa)光(guang)(guang)(guang)(guang)(guang)器件所无法比拟的(de)，主要(yao)具有特点(dian)有：安全、高效率(lv)、环保、寿(shou)命长、响应快(kuai)、体积小、结构牢固。因此，发(fa)(fa)光(guang)(guang)(guang)(guang)(guang)二(er)(er)极(ji)管(guan)是(shi)一种符(fu)合绿色照(zhao)(zhao)明要(yao)求的(de)光(guang)(guang)(guang)(guang)(guang)源(yuan)(yuan)。[6]发(fa)(fa)光(guang)(guang)(guang)(guang)(guang)二(er)(er)极(ji)管(guan)在很(hen)多(duo)领域(yu)得(de)到(dao)普遍应用(yong)(yong)(yong)(yong)(yong)(yong)，下面介绍几(ji)点(dian)其主要(yao)应用(yong)(yong)(yong)(yong)(yong)(yong)：（1）电(dian)(dian)(dian)子(zi)(zi)用(yong)(yong)(yong)(yong)(yong)(yong)品(pin)(pin)中(zhong)的(de)应用(yong)(yong)(yong)(yong)(yong)(yong)发(fa)(fa)光(guang)(guang)(guang)(guang)(guang)二(er)(er)极(ji)管(guan)在电(dian)(dian)(dian)子(zi)(zi)用(yong)(yong)(yong)(yong)(yong)(yong)品(pin)(pin)中(zhong)一般用(yong)(yong)(yong)(yong)(yong)(yong)作(zuo)屏(ping)背光(guang)(guang)(guang)(guang)(guang)源(yuan)(yuan)或作(zuo)显示、照(zhao)(zhao)明应用(yong)(yong)(yong)(yong)(yong)(yong)。美(mei)高森美(mei)二(er)(er)极(ji)管(guan)经销商找哪家(jia)，推荐(jian)咨询上(shang)海寅涵智(zhi)能科技。黑龙江整流二(er)(er)极(ji)管(guan)代理货(huo)源(yuan)(yuan)

正(zheng)向(xiang)(xiang)(xiang)(xiang)导电(dian)(dian)，反(fan)(fan)向(xiang)(xiang)(xiang)(xiang)不导电(dian)(dian)）晶体二(er)(er)(er)极(ji)(ji)管(guan)是一(yi)个由p型半导体和(he)(he)(he)n型半导体形(xing)成(cheng)的(de)(de)(de)(de)p-n结，在(zai)其界面处两侧形(xing)成(cheng)了空间(jian)电(dian)(dian)荷层，并且建(jian)(jian)有自(zi)建(jian)(jian)电(dian)(dian)场(chang)，当(dang)不存在(zai)外(wai)(wai)加(jia)(jia)(jia)电(dian)(dian)压(ya)(ya)时(shi)(shi)，因(yin)为(wei)p-n结两边载流(liu)(liu)(liu)子浓度(du)差引起(qi)的(de)(de)(de)(de)扩散电(dian)(dian)流(liu)(liu)(liu)和(he)(he)(he)自(zi)建(jian)(jian)电(dian)(dian)场(chang)引起(qi)的(de)(de)(de)(de)漂移电(dian)(dian)流(liu)(liu)(liu)相等而处于(yu)电(dian)(dian)平衡(heng)状(zhuang)态。当(dang)产(chan)(chan)(chan)(chan)生(sheng)正(zheng)向(xiang)(xiang)(xiang)(xiang)电(dian)(dian)压(ya)(ya)偏置(zhi)(zhi)时(shi)(shi)，外(wai)(wai)界电(dian)(dian)场(chang)与自(zi)建(jian)(jian)电(dian)(dian)场(chang)的(de)(de)(de)(de)互相抑消作用(yong)使(shi)载流(liu)(liu)(liu)子的(de)(de)(de)(de)扩散电(dian)(dian)流(liu)(liu)(liu)增(zeng)加(jia)(jia)(jia)引起(qi)了正(zheng)向(xiang)(xiang)(xiang)(xiang)电(dian)(dian)流(liu)(liu)(liu)（也就(jiu)是导电(dian)(dian)的(de)(de)(de)(de)原(yuan)因(yin)）。当(dang)产(chan)(chan)(chan)(chan)生(sheng)反(fan)(fan)向(xiang)(xiang)(xiang)(xiang)电(dian)(dian)压(ya)(ya)偏置(zhi)(zhi)时(shi)(shi)，外(wai)(wai)界电(dian)(dian)场(chang)与自(zi)建(jian)(jian)电(dian)(dian)场(chang)进(jin)一(yi)步加(jia)(jia)(jia)强，形(xing)成(cheng)在(zai)一(yi)定反(fan)(fan)向(xiang)(xiang)(xiang)(xiang)电(dian)(dian)压(ya)(ya)范围中(zhong)与反(fan)(fan)向(xiang)(xiang)(xiang)(xiang)偏置(zhi)(zhi)电(dian)(dian)压(ya)(ya)值(zhi)无关的(de)(de)(de)(de)反(fan)(fan)向(xiang)(xiang)(xiang)(xiang)饱和(he)(he)(he)电(dian)(dian)流(liu)(liu)(liu)I0（这(zhei)也就(jiu)是不导电(dian)(dian)的(de)(de)(de)(de)原(yuan)因(yin)）。当(dang)外(wai)(wai)加(jia)(jia)(jia)的(de)(de)(de)(de)反(fan)(fan)向(xiang)(xiang)(xiang)(xiang)电(dian)(dian)压(ya)(ya)高(gao)(gao)到(dao)一(yi)定程度(du)时(shi)(shi)，p-n结空间(jian)电(dian)(dian)荷层中(zhong)的(de)(de)(de)(de)电(dian)(dian)场(chang)强度(du)达到(dao)临界值(zhi)产(chan)(chan)(chan)(chan)生(sheng)载流(liu)(liu)(liu)子的(de)(de)(de)(de)倍增(zeng)过程，产(chan)(chan)(chan)(chan)生(sheng)大(da)量电(dian)(dian)子空穴对(dui)，产(chan)(chan)(chan)(chan)生(sheng)了数(shu)值(zhi)很大(da)的(de)(de)(de)(de)反(fan)(fan)向(xiang)(xiang)(xiang)(xiang)击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)电(dian)(dian)流(liu)(liu)(liu)，称为(wei)二(er)(er)(er)极(ji)(ji)管(guan)的(de)(de)(de)(de)击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)现象。二(er)(er)(er)极(ji)(ji)管(guan)原(yuan)理(li)反(fan)(fan)向(xiang)(xiang)(xiang)(xiang)击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)编辑反(fan)(fan)向(xiang)(xiang)(xiang)(xiang)击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)按机理(li)分为(wei)齐(qi)纳(na)击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)和(he)(he)(he)雪崩击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)两种情况。在(zai)高(gao)(gao)掺(chan)杂(za)浓度(du)的(de)(de)(de)(de)情况下(xia)，因(yin)势(shi)垒区宽度(du)很小，反(fan)(fan)向(xiang)(xiang)(xiang)(xiang)电(dian)(dian)压(ya)(ya)较大(da)时(shi)(shi)，破坏了势(shi)垒区内(nei)共(gong)价(jia)键(jian)结构，使(shi)价(jia)电(dian)(dian)子脱离共(gong)价(jia)键(jian)束缚(fu)，产(chan)(chan)(chan)(chan)生(sheng)电(dian)(dian)子-空穴对(dui)，致使(shi)电(dian)(dian)流(liu)(liu)(liu)急剧增(zeng)大(da)，这(zhei)种击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)称为(wei)齐(qi)纳(na)击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)。如果掺(chan)杂(za)浓度(du)较低(di)，势(shi)垒区宽度(du)较宽，不容易产(chan)(chan)(chan)(chan)生(sheng)齐(qi)纳(na)击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)。雪崩击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)另一(yi)种击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)为(wei)雪崩击(ji)(ji)(ji)穿(chuan)(chuan)(chuan)(chuan)(chuan)。当(dang)反(fan)(fan)向(xiang)(xiang)(xiang)(xiang)电(dian)(dian)压(ya)(ya)增(zeng)加(jia)(jia)(jia)到(dao)较大(da)数(shu)值(zhi)时(shi)(shi)。天津Microsemi美高(gao)(gao)森(sen)美二(er)(er)(er)极(ji)(ji)管(guan)国内(nei)经销上海寅(yin)涵(han)智能(neng)科技(ji)专(zhuan)业供应桥式整流(liu)(liu)(liu)二(er)(er)(er)极(ji)(ji)管(guan)PWB130AA40欢迎(ying)咨询。

所(suo)以依(yi)据(ju)这(zhei)一(yi)(yi)(yi)点可(ke)以确定(ding)这(zhei)一(yi)(yi)(yi)电(dian)(dian)路(lu)(lu)(lu)是(shi)(shi)为了(le)(le)稳定(ding)电(dian)(dian)路(lu)(lu)(lu)中(zhong)A点的(de)(de)直(zhi)流工(gong)作(zuo)电(dian)(dian)压。3）电(dian)(dian)路(lu)(lu)(lu)中(zhong)有多(duo)只元(yuan)(yuan)器件(jian)时(shi)，一(yi)(yi)(yi)定(ding)要(yao)设(she)法搞清楚实现(xian)电(dian)(dian)路(lu)(lu)(lu)功能(neng)的(de)(de)主要(yao)元(yuan)(yuan)器件(jian)，然(ran)后(hou)围绕它(ta)进行(xing)(xing)展开(kai)分(fen)(fen)析(xi)(xi)。分(fen)(fen)析(xi)(xi)中(zhong)运用(yong)(yong)该元(yuan)(yuan)器件(jian)主要(yao)特性(xing)，进行(xing)(xing)合理(li)(li)解释。二(er)极(ji)管(guan)温(wen)度(du)补偿(chang)电(dian)(dian)路(lu)(lu)(lu)及故障(zhang)处(chu)理(li)(li)众所(suo)周知，PN结(jie)(jie)(jie)导通(tong)后(hou)有一(yi)(yi)(yi)个(ge)约为（指硅材料(liao)PN结(jie)(jie)(jie)）的(de)(de)压降(jiang)(jiang)(jiang)，同(tong)时(shi)PN结(jie)(jie)(jie)还(hai)有一(yi)(yi)(yi)个(ge)与温(wen)度(du)相关的(de)(de)特性(xing)：PN结(jie)(jie)(jie)导通(tong)后(hou)的(de)(de)压降(jiang)(jiang)(jiang)基(ji)本(ben)不(bu)(bu)变，但不(bu)(bu)是(shi)(shi)不(bu)(bu)变，PN结(jie)(jie)(jie)两端的(de)(de)压降(jiang)(jiang)(jiang)随温(wen)度(du)升高而略有下(xia)降(jiang)(jiang)(jiang)，温(wen)度(du)愈(yu)高其下(xia)降(jiang)(jiang)(jiang)的(de)(de)量愈(yu)多(duo)，当然(ran)PN结(jie)(jie)(jie)两端电(dian)(dian)压下(xia)降(jiang)(jiang)(jiang)量的(de)(de)值(zhi)对(dui)于，利用(yong)(yong)这(zhei)一(yi)(yi)(yi)特性(xing)可(ke)以构(gou)成(cheng)温(wen)度(du)补偿(chang)电(dian)(dian)路(lu)(lu)(lu)。如图9-42所(suo)示是(shi)(shi)利用(yong)(yong)二(er)极(ji)管(guan)温(wen)度(du)特性(xing)构(gou)成(cheng)的(de)(de)温(wen)度(du)补偿(chang)电(dian)(dian)路(lu)(lu)(lu)。图9-42二(er)极(ji)管(guan)温(wen)度(du)补偿(chang)电(dian)(dian)路(lu)(lu)(lu)对(dui)于初(chu)学者来讲，看不(bu)(bu)懂电(dian)(dian)路(lu)(lu)(lu)中(zhong)VT1等元(yuan)(yuan)器件(jian)构(gou)成(cheng)的(de)(de)是(shi)(shi)一(yi)(yi)(yi)种放(fang)大(da)器，这(zhei)对(dui)分(fen)(fen)析(xi)(xi)这(zhei)一(yi)(yi)(yi)电(dian)(dian)路(lu)(lu)(lu)工(gong)作(zuo)原(yuan)(yuan)(yuan)理(li)(li)不(bu)(bu)利。在电(dian)(dian)路(lu)(lu)(lu)分(fen)(fen)析(xi)(xi)中(zhong)，熟(shu)悉(xi)VT1等元(yuan)(yuan)器件(jian)所(suo)构(gou)成(cheng)的(de)(de)单(dan)元(yuan)(yuan)电(dian)(dian)路(lu)(lu)(lu)功能(neng)，对(dui)分(fen)(fen)析(xi)(xi)VD1工(gong)作(zuo)原(yuan)(yuan)(yuan)理(li)(li)有着积极(ji)意义。了(le)(le)解了(le)(le)单(dan)元(yuan)(yuan)电(dian)(dian)路(lu)(lu)(lu)的(de)(de)功能(neng)，一(yi)(yi)(yi)切(qie)电(dian)(dian)路(lu)(lu)(lu)分(fen)(fen)析(xi)(xi)就可(ke)以围绕它(ta)进行(xing)(xing)展开(kai)，做到有的(de)(de)放(fang)矢、事半功倍。1．需要(yao)了(le)(le)解的(de)(de)深层(ceng)次电(dian)(dian)路(lu)(lu)(lu)工(gong)作(zuo)原(yuan)(yuan)(yuan)理(li)(li)分(fen)(fen)析(xi)(xi)这(zhei)一(yi)(yi)(yi)电(dian)(dian)路(lu)(lu)(lu)工(gong)作(zuo)原(yuan)(yuan)(yuan)理(li)(li)需要(yao)了(le)(le)解下(xia)列两个(ge)深层(ceng)次的(de)(de)电(dian)(dian)路(lu)(lu)(lu)原(yuan)(yuan)(yuan)理(li)(li)。1）VT1等构(gou)成(cheng)一(yi)(yi)(yi)种放(fang)大(da)器电(dian)(dian)路(lu)(lu)(lu)，对(dui)于放(fang)大(da)器而言要(yao)求(qiu)它(ta)的(de)(de)工(gong)作(zuo)稳定(ding)性(xing)好。

二极管正负极判断方(fang)法如下：

1、对于(yu)普(pu)通(tong)二极(ji)管，可以看管体表(biao)面，有(you)白线的一(yi)端为负极(ji)。

2、对于(yu)发光二极管(guan)，引脚(jiao)长(zhang)的为(wei)正极，短的为(wei)负极。

3、如果引脚被剪得(de)一样长了，发光二(er)极(ji)管管体内部金(jin)属极(ji)较小的(de)是(shi)正极(ji)，大的(de)片(pian)状的(de)是(shi)负(fu)极(ji)。

4、如果看不清(qing)，也可(ke)打开万用表(biao)，将旋(xuan)钮拨到通(tong)断档，将红(hong)黑(hei)表(biao)笔分别接在两个(ge)引(yin)脚。若有(you)读数，则(ze)红(hong)表(biao)笔一端为正极(ji)(ji)(ji)(ji)，若读数为1，则(ze)黑(hei)表(biao)笔一端为正极(ji)(ji)(ji)(ji)。二(er)极(ji)(ji)(ji)(ji)管(guan)是用半导体(ti)材(cai)料（硅、硒、锗等）制(zhi)成的一种电(dian)子(zi)器(qi)件，它具有(you)单(dan)向导电(dian)性能(neng)，即给二(er)极(ji)(ji)(ji)(ji)管(guan)阳极(ji)(ji)(ji)(ji)加(jia)上正向电(dian)压(ya)时(shi)，二(er)极(ji)(ji)(ji)(ji)管(guan)导通(tong)。当给阳极(ji)(ji)(ji)(ji)和阴极(ji)(ji)(ji)(ji)加(jia)上反向电(dian)压(ya)时(shi)，二(er)极(ji)(ji)(ji)(ji)管(guan)截(jie)止。

因此，二极(ji)管(guan)(guan)的(de)(de)导通(tong)和(he)截止，则(ze)相(xiang)当于开(kai)关的(de)(de)接通(tong)与(yu)断(duan)开(kai)。二极(ji)管(guan)(guan)结(jie)构构成(cheng)二极(ji)管(guan)(guan)就是由一(yi)个PN结(jie)加上(shang)(shang)相(xiang)应的(de)(de)电(dian)(dian)极(ji)引线及管(guan)(guan)壳封(feng)装而成(cheng)的(de)(de)，采用不同的(de)(de)掺杂工艺。通(tong)过扩散作用，将P型半(ban)导体(ti)(ti)与(yu)N型半(ban)导体(ti)(ti)制作在同一(yi)块半(ban)导体(ti)(ti)（通(tong)常(chang)是硅或(huo)锗）基片上(shang)(shang)，在它们的(de)(de)交(jiao)界面(mian)就形成(cheng)空间(jian)电(dian)(dian)荷区(qu)称为PN结(jie)。上(shang)(shang)海寅涵智能科技(ji)是艾赛斯可(ke)控硅二极(ji)管(guan)(guan)专(zhuan)业进口厂商，种类(lei)齐(qi)全，价格优惠。

二极管是什么类型？

二(er)(er)(er)极(ji)管(guan)(guan)是一(yi)种(zhong)(zhong)电(dian)(dian)(dian)子元件，它(ta)具(ju)有两种(zhong)(zhong)工作状(zhuang)态：正向偏(pian)(pian)置(zhi)和反向偏(pian)(pian)置(zhi)。在(zai)(zai)正向偏(pian)(pian)置(zhi)状(zhuang)态下(xia)(xia)，二(er)(er)(er)极(ji)管(guan)(guan)允许电(dian)(dian)(dian)流通过(guo)；而(er)在(zai)(zai)反向偏(pian)(pian)置(zhi)状(zhuang)态下(xia)(xia)，二(er)(er)(er)极(ji)管(guan)(guan)阻止电(dian)(dian)(dian)流通过(guo)。这种(zhong)(zhong)单向导电(dian)(dian)(dian)特(te)性使得二(er)(er)(er)极(ji)管(guan)(guan)成为电(dian)(dian)(dian)子电(dian)(dian)(dian)路中(zhong)的(de)基本构建模块之一(yi)。

二(er)极管(guan)有多种类(lei)型，以下是一(yi)些常见的二(er)极管(guan)类(lei)型：

1.整(zheng)(zheng)流(liu)(liu)二(er)极管(guan)：这类二(er)极管(guan)主(zhu)要用于(yu)整(zheng)(zheng)流(liu)(liu)，即将交流(liu)(liu)电（AC）转(zhuan)换(huan)为直流(liu)(liu)电（DC）。

2.齐(qi)纳二极管：齐(qi)纳二极管是(shi)一(yi)种限(xian)压二极管，用于稳定电(dian)(dian)压。当(dang)施加在二极管两端的电(dian)(dian)压达到某(mou)一(yi)特定值时，齐(qi)纳二极管将(jiang)开始(shi)导通。

3.开关(guan)二极(ji)管：开关(guan)二极(ji)管是一种高(gao)速开关(guan)元件，用(yong)(yong)于高(gao)速开关(guan)应(ying)用(yong)(yong)。它们具有较低的电容和快速的开关(guan)速度，适合高(gao)频应(ying)用(yong)(yong)。

4.肖特(te)(te)基(ji)(ji)二极(ji)(ji)(ji)管(guan)(guan)：肖特(te)(te)基(ji)(ji)二极(ji)(ji)(ji)管(guan)(guan)是(shi)一种(zhong)低压(ya)降二极(ji)(ji)(ji)管(guan)(guan)，具(ju)有快速开(kai)关速度和较低的正向电压(ya)降。它们通常用于高频开(kai)关应(ying)用和低压(ya)应(ying)用。5.发(fa)光二极(ji)(ji)(ji)管(guan)(guan)（LED）：发(fa)光二极(ji)(ji)(ji)管(guan)(guan)是(shi)一种(zhong)特(te)(te)殊类型的二极(ji)(ji)(ji)管(guan)(guan)，当电流通过时，它会(hui)发(fa)出光线。它们广泛应(ying)用于显示(shi)(shi)器、指示(shi)(shi)灯和照明设(she)备(bei)。硅功率开(kai)关二极(ji)(ji)(ji)管(guan)(guan)经销商找哪家，推荐咨询上海(hai)寅涵智能科(ke)技。宁夏(xia)semikron西门康二极(ji)(ji)(ji)管(guan)(guan)半(ban)导体模块(kuai)

上(shang)海(hai)寅涵智(zhi)能科技(ji)经销各(ge)类型号艾赛斯(si)二(er)极管，欢迎联系购买。黑龙江整流二(er)极管代理货源

所以它在断(duan)电(dian)(dian)(dian)(dian)(dian)(dian)时会产(chan)生电(dian)(dian)(dian)(dian)(dian)(dian)压很大的(de)(de)(de)(de)反(fan)向(xiang)电(dian)(dian)(dian)(dian)(dian)(dian)动(dong)势(shi)(shi)，会击穿继(ji)(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)的(de)(de)(de)(de)驱动(dong)三极(ji)(ji)管(guan)(guan)，为(wei)此(ci)要在继(ji)(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)驱动(dong)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中(zhong)设置二(er)(er)(er)极(ji)(ji)管(guan)(guan)保(bao)护(hu)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，以保(bao)护(hu)继(ji)(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)驱动(dong)管(guan)(guan)。如图(tu)(tu)9-53所示是(shi)继(ji)(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)驱动(dong)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中(zhong)的(de)(de)(de)(de)二(er)(er)(er)极(ji)(ji)管(guan)(guan)保(bao)护(hu)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中(zhong)的(de)(de)(de)(de)J1是(shi)继(ji)(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)，VD1是(shi)驱动(dong)管(guan)(guan)VT1的(de)(de)(de)(de)保(bao)护(hu)二(er)(er)(er)极(ji)(ji)管(guan)(guan)，R1和(he)C1构成继(ji)(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)内(nei)部(bu)开关触点的(de)(de)(de)(de)消火花(hua)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)。1．电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)工作(zuo)(zuo)原(yuan)理分析继(ji)(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)内(nei)部(bu)有一(yi)(yi)组线(xian)圈，如图(tu)(tu)9-54所示是(shi)等效电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，在继(ji)(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)断(duan)电(dian)(dian)(dian)(dian)(dian)(dian)前(qian)(qian)，流过(guo)继(ji)(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)线(xian)圈L1的(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)流方(fang)向(xiang)为(wei)从上(shang)而(er)下(xia)，在断(duan)电(dian)(dian)(dian)(dian)(dian)(dian)后(hou)线(xian)圈产(chan)生反(fan)向(xiang)电(dian)(dian)(dian)(dian)(dian)(dian)动(dong)势(shi)(shi)阻(zu)碍这(zhei)(zhei)一(yi)(yi)电(dian)(dian)(dian)(dian)(dian)(dian)流变(bian)化(hua)，即(ji)产(chan)生一(yi)(yi)个从上(shang)而(er)过(guo)的(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)流，见图(tu)(tu)中(zhong)虚线(xian)所示。根据前(qian)(qian)面介(jie)绍的(de)(de)(de)(de)线(xian)圈两端(duan)反(fan)向(xiang)电(dian)(dian)(dian)(dian)(dian)(dian)动(dong)势(shi)(shi)判(pan)别方(fang)法(fa)(fa)可知，反(fan)向(xiang)电(dian)(dian)(dian)(dian)(dian)(dian)动(dong)势(shi)(shi)在线(xian)圈L1上(shang)的(de)(de)(de)(de)极(ji)(ji)性为(wei)下(xia)正(zheng)上(shang)负，见图(tu)(tu)中(zhong)所示。如表9-44所示是(shi)这(zhei)(zhei)一(yi)(yi)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中(zhong)保(bao)护(hu)二(er)(er)(er)极(ji)(ji)管(guan)(guan)工作(zuo)(zuo)原(yuan)理说(shuo)(shuo)明(ming)。表9-44保(bao)护(hu)二(er)(er)(er)极(ji)(ji)管(guan)(guan)工作(zuo)(zuo)原(yuan)理说(shuo)(shuo)明(ming)2．故障检(jian)测(ce)(ce)方(fang)法(fa)(fa)和(he)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)故障分析对于这(zhei)(zhei)一(yi)(yi)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中(zhong)的(de)(de)(de)(de)保(bao)护(hu)二(er)(er)(er)极(ji)(ji)管(guan)(guan)不能采(cai)用测(ce)(ce)量(liang)二(er)(er)(er)极(ji)(ji)管(guan)(guan)两端(duan)直流电(dian)(dian)(dian)(dian)(dian)(dian)压降的(de)(de)(de)(de)方(fang)法(fa)(fa)来判(pan)断(duan)检(jian)测(ce)(ce)故障，也不能采(cai)用在路(lu)(lu)(lu)测(ce)(ce)量(liang)二(er)(er)(er)极(ji)(ji)管(guan)(guan)正(zheng)向(xiang)和(he)反(fan)向(xiang)电(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)的(de)(de)(de)(de)方(fang)法(fa)(fa)，因为(wei)这(zhei)(zhei)一(yi)(yi)二(er)(er)(er)极(ji)(ji)管(guan)(guan)两端(duan)并联着继(ji)(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)线(xian)圈，这(zhei)(zhei)圈的(de)(de)(de)(de)直流电(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)很小(xiao)，所以无法(fa)(fa)通(tong)过(guo)测(ce)(ce)量(liang)电(dian)(dian)(dian)(dian)(dian)(dian)压降的(de)(de)(de)(de)方(fang)法(fa)(fa)来判(pan)断(duan)二(er)(er)(er)极(ji)(ji)管(guan)(guan)质量(liang)。应该采(cai)用代(dai)替检(jian)查的(de)(de)(de)(de)方(fang)法(fa)(fa)。当保(bao)护(hu)二(er)(er)(er)极(ji)(ji)管(guan)(guan)开路(lu)(lu)(lu)时，对继(ji)(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)电(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)工作(zuo)(zuo)状态没有大的(de)(de)(de)(de)影响。黑(hei)龙江整流二(er)(er)(er)极(ji)(ji)管(guan)(guan)代(dai)理货源

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