在(zai)開(kai)(kai)機的(de)(de)(de)(de)(de)(de)(de)瞬(shun)間，濾波電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)尚未建(jian)立，由于(yu)要(yao)對(dui)大(da)(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)．通過(guo)(guo)(guo)PFC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)相對(dui)比較(jiao)大(da)(da)(da)。如果在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源開(kai)(kai)關接通的(de)(de)(de)(de)(de)(de)(de)瞬(shun)間是(shi)在(zai)正(zheng)(zheng)弦波的(de)(de)(de)(de)(de)(de)(de)最大(da)(da)(da)值時，對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)過(guo)(guo)(guo)程中PFC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)L有可能(neng)會(hui)出(chu)現(xian)磁(ci)飽和的(de)(de)(de)(de)(de)(de)(de)情況，此(ci)時PFC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路工(gong)作(zuo)(zuo)就麻煩了(le)，在(zai)磁(ci)飽和的(de)(de)(de)(de)(de)(de)(de)情況，流(liu)過(guo)(guo)(guo)PFC開(kai)(kai)關管(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)就會(hui)失去限制，燒壞開(kai)(kai)關管(guan)(guan)。為防(fang)止悲劇(ju)發生，一(yi)種方法是(shi)對(dui)PFC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路工(gong)作(zuo)(zuo)的(de)(de)(de)(de)(de)(de)(de)工(gong)作(zuo)(zuo)時序加以(yi)(yi)控(kong)制，即當對(dui)大(da)(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)的(de)(de)(de)(de)(de)(de)(de)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)完成(cheng)以(yi)(yi)后(hou)，再啟動PFC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路：另(ling)(ling)一(yi)種比較(jiao)簡(jian)單的(de)(de)(de)(de)(de)(de)(de)辦法就是(shi)在(zai)PFC線(xian)(xian)圈到升壓(ya)(ya)(ya)二(er)(er)極(ji)管(guan)(guan)上(shang)并(bing)聯一(yi)只(zhi)二(er)(er)極(ji)管(guan)(guan)旁路。啟動的(de)(de)(de)(de)(de)(de)(de)瞬(shun)間，給大(da)(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)的(de)(de)(de)(de)(de)(de)(de)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)提供(gong)另(ling)(ling)一(yi)個支路，防(fang)止大(da)(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)流(liu)過(guo)(guo)(guo)PFC線(xian)(xian)圈造(zao)成(cheng)飽和，過(guo)(guo)(guo)流(liu)損壞開(kai)(kai)關管(guan)(guan)，保護(hu)開(kai)(kai)關管(guan)(guan)，同(tong)時該保護(hu)二(er)(er)極(ji)管(guan)(guan)也(ye)分流(liu)了(le)升壓(ya)(ya)(ya)二(er)(er)極(ji)管(guan)(guan)上(shang)的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，保護(hu)了(le)升壓(ya)(ya)(ya)二(er)(er)極(ji)管(guan)(guan)。另(ling)(ling)外，保護(hu)二(er)(er)極(ji)管(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)加入(ru)使得對(dui)大(da)(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)過(guo)(guo)(guo)程加快．其上(shang)的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)及時建(jian)立，也(ye)能(neng)使PFC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)反(fan)饋環(huan)路及時工(gong)作(zuo)(zuo)，減小開(kai)(kai)機時PFC開(kai)(kai)關管(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)導通時間．使PFC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路盡快正(zheng)(zheng)常工(gong)作(zuo)(zuo)。‘所以(yi)(yi)，綜上(shang)所述，以(yi)(yi)上(shang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路中保護(hu)二(er)(er)極(ji)管(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)作(zuo)(zuo)用(yong)是(shi)在(zai)開(kai)(kai)機瞬(shun)間或負(fu)載短(duan)路、PFC輸出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)低于(yu)輸入(ru)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)非正(zheng)(zheng)常狀況下給電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)提供(gong)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路徑，防(fang)止PFC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)磁(ci)飽和對(dui)PFCMOS管(guan)(guan)造(zao)成(cheng)的(de)(de)(de)(de)(de)(de)(de)危險，同(tong)時也(ye)減輕了(le)PFC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)和升壓(ya)(ya)(ya)二(er)(er)極(ji)管(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)負(fu)擔，起到保護(hu)作(zuo)(zuo)用(yong)。在(zai)開(kai)(kai)機正(zheng)(zheng)常工(gong)作(zuo)(zuo)以(yi)(yi)后(hou)。MUR1560是(shi)什么類型的(de)(de)(de)(de)(de)(de)(de)管(guan)(guan)子(zi)？ITO220封裝(zhuang)的(de)(de)(de)(de)(de)(de)(de)快恢復二(er)(er)極(ji)管(guan)(guan)MUR1660CA

下(xia)降開(kai)關(guan)速(su)(su)度(du)(du)或采用緩(huan)沖(chong)(chong)電(dian)(dian)(dian)(dian)路(lu)(lu)可以減低(di)尖(jian)峰電(dian)(dian)(dian)(dian)壓(ya)。增加(jia)緩(huan)沖(chong)(chong)電(dian)(dian)(dian)(dian)路(lu)(lu)會增加(jia)電(dian)(dian)(dian)(dian)路(lu)(lu)成本并且使電(dian)(dian)(dian)(dian)路(lu)(lu)設(she)計(ji)變繁復(fu)(fu)(fu)。這(zhe)都是(shi)我們所不期(qi)望的(de)(de)(de)。本文介紹了迅(xun)速(su)(su)軟(ruan)恢復(fu)(fu)(fu)二(er)(er)極(ji)(ji)(ji)管(guan)及其模塊。該(gai)(gai)模塊電(dian)(dian)(dian)(dian)壓(ya)范圍從400V到1200V，額定電(dian)(dian)(dian)(dian)流(liu)(liu)從60A～400A不等。設(she)計(ji)上(shang)該(gai)(gai)模塊使用外延二(er)(er)極(ji)(ji)(ji)管(guan)芯片，該(gai)(gai)芯片使用平面結終止結構，玻璃(li)鈍化(圖1)并有(you)(you)硅橡膠(jiao)維護(hu)。恢復(fu)(fu)(fu)特點如(ru)圖2所示(shi)。圖1圖2快速(su)(su)軟(ruan)恢復(fu)(fu)(fu)二(er)(er)極(ji)(ji)(ji)管(guan)的(de)(de)(de)基(ji)(ji)區和正(zheng)極(ji)(ji)(ji)之間使用緩(huan)沖(chong)(chong)層構造(zao)，使得在(zai)空間電(dian)(dian)(dian)(dian)荷區擴張后的(de)(de)(de)剩余基(ji)(ji)區內駐留更多(duo)的(de)(de)(de)殘存電(dian)(dian)(dian)(dian)荷，并且駐留時(shi)間更長，提高了二(er)(er)極(ji)(ji)(ji)管(guan)的(de)(de)(de)軟(ruan)度(du)(du)。快回復(fu)(fu)(fu)二(er)(er)極(ji)(ji)(ji)管(guan)的(de)(de)(de)軟(ruan)度(du)(du)由圖2定義。軟(ruan)度(du)(du)因(yin)子(zi)(zi)(zi)反向(xiang)(xiang)峰值(zhi)電(dian)(dian)(dian)(dian)壓(ya)由下(xia)式確定：VR為加(jia)在(zai)二(er)(er)極(ji)(ji)(ji)管(guan)上(shang)的(de)(de)(de)反向(xiang)(xiang)電(dian)(dian)(dian)(dian)壓(ya)。二(er)(er)極(ji)(ji)(ji)管(guan)道軟(ruan)度(du)(du)因(yin)子(zi)(zi)(zi)越大，在(zai)關(guan)斷過(guo)程中產(chan)生的(de)(de)(de)反向(xiang)(xiang)峰值(zhi)電(dian)(dian)(dian)(dian)壓(ya)越低(di)，使開(kai)關(guan)器件及整(zheng)(zheng)個電(dian)(dian)(dian)(dian)路(lu)(lu)處于較(jiao)安全的(de)(de)(de)狀況。一般國內生產(chan)的(de)(de)(de)迅(xun)速(su)(su)二(er)(er)極(ji)(ji)(ji)管(guan)其反向(xiang)(xiang)回復(fu)(fu)(fu)時(shi)間較(jiao)長，大概在(zai)1～6μs，軟(ruan)度(du)(du)因(yin)子(zi)(zi)(zi)約為，國內有(you)(you)多(duo)家整(zheng)(zheng)流(liu)(liu)器制造(zao)公司也(ye)在(zai)研究(jiu)迅(xun)速(su)(su)軟(ruan)恢復(fu)(fu)(fu)二(er)(er)極(ji)(ji)(ji)管(guan)，電(dian)(dian)(dian)(dian)流(liu)(liu)較(jiao)大，但軟(ruan)度(du)(du)因(yin)子(zi)(zi)(zi)在(zai)～。傳統的(de)(de)(de)迅(xun)速(su)(su)整(zheng)(zheng)流(liu)(liu)二(er)(er)極(ji)(ji)(ji)管(guan)用到摻金或鉑(bo)的(de)(de)(de)外延片以支配(pei)載流(liu)(liu)子(zi)(zi)(zi)壽命(ming)，但這(zhe)些二(er)(er)極(ji)(ji)(ji)管(guan)表現出(chu)了以下(xia)的(de)(de)(de)技(ji)術缺陷：1．正(zheng)向(xiang)(xiang)電(dian)(dian)(dian)(dian)壓(ya)降Vf隨著溫(wen)度(du)(du)的(de)(de)(de)升高而下(xia)降；2．高溫(wen)下(xia)漏電(dian)(dian)(dian)(dian)流(liu)(liu)大；3．高溫(wen)下(xia)迅(xun)速(su)(su)di/dt時(shi)開(kai)關(guan)不平穩。TO220F封裝的(de)(de)(de)快恢復(fu)(fu)(fu)二(er)(er)極(ji)(ji)(ji)管(guan)MUR860MUR3060PT是(shi)什么類型的(de)(de)(de)管(guan)子(zi)(zi)(zi)？

緩(huan)沖(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)(de)形式很多，如(ru)圖(tu)1所示的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)是(shi)(shi)基本(ben)的(de)(de)(de)(de)也(ye)是(shi)(shi)行(xing)之(zhi)有效的(de)(de)(de)(de)一(yi)種(zhong)緩(huan)沖(chong)保護電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。緩(huan)沖(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)由(you)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)LS、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)CS、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)RS和二(er)極(ji)(ji)管(guan)(guan)(guan)(guan)VDS組成。其中(zhong)LS是(shi)(shi)串聯電(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)。用來限(xian)制晶體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)VT開(kai)通時(shi)(shi)(shi)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)上升(sheng)率，由(you)CS、RS、VDS構成并聯緩(huan)沖(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)，主要(yao)用來在(zai)(zai)VT關斷時(shi)(shi)(shi)限(xian)制集(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓Uce上升(sheng)率，使大功率晶體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)工作點軌跡遠離(li)安全工作區的(de)(de)(de)(de)為(wei)界。當(dang)(dang)晶體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)VT開(kai)通時(shi)(shi)(shi)，直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機由(you)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源經(jing)晶體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，其左端(duan)(duan)(duan)(duan)為(wei)正(zheng)(zheng)，右(you)端(duan)(duan)(duan)(duan)為(wei)負(fu)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機正(zheng)(zheng)向旋轉(zhuan)；當(dang)(dang)晶體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)VT關斷時(shi)(shi)(shi),由(you)于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)樞電(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)的(de)(de)(de)(de)影響，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)樞電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)不(bu)能突變，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機將產(chan)生感(gan)生電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)勢，其左端(duan)(duan)(duan)(duan)為(wei)負(fu)，右(you)端(duan)(duan)(duan)(duan)為(wei)正(zheng)(zheng)，如(ru)果沒有續(xu)(xu)流(liu)(liu)(liu)二(er)極(ji)(ji)管(guan)(guan)(guan)(guan)VD，此電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)勢將與(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓US相(xiang)加(jia)，一(yi)起加(jia)在(zai)(zai)晶體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)VT的(de)(de)(de)(de)C、E兩端(duan)(duan)(duan)(duan)，而整(zheng)個回路(lu)(lu)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)很大，因此晶體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)兩端(duan)(duan)(duan)(duan)的(de)(de)(de)(de)端(duan)(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓Uce也(ye)很高。晶體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)必然被擊穿。當(dang)(dang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)并聯有續(xu)(xu)流(liu)(liu)(liu)二(er)極(ji)(ji)管(guan)(guan)(guan)(guan)VD(如(ru)圖(tu)1所示),在(zai)(zai)晶體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)VT導通時(shi)(shi)(shi)，二(er)極(ji)(ji)管(guan)(guan)(guan)(guan)VD左端(duan)(duan)(duan)(duan)為(wei)止(zhi)，右(you)端(duan)(duan)(duan)(duan)為(wei)負(fu)，VD截(jie)止(zhi);當(dang)(dang)晶體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)截(jie)止(zhi)時(shi)(shi)(shi)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機產(chan)生感(gan)生電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)勢。左負(fu)右(you)正(zheng)(zheng)，VD正(zheng)(zheng)向導通，給電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機提供(gong)--個續(xu)(xu)流(liu)(liu)(liu)回路(lu)(lu)，不(bu)但可以保護晶體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)，同時(shi)(shi)(shi)讓(rang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)連(lian)續(xu)(xu)、轉(zhuan)矩穩定。

以及逆變器和(he)(he)焊接電(dian)源(yuan)中的(de)(de)(de)(de)(de)功(gong)率開關(guan)的(de)(de)(de)(de)(de)保(bao)護(hu)二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)和(he)(he)續流二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)。2．迅(xun)速(su)軟恢復二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)一(yi)種(zhong)方(fang)法(fa)(fa)使(shi)用(yong)(yong)緩(huan)沖層(ceng)構(gou)(gou)造(zao)(zao)(zao)明顯(xian)改善了二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)反(fan)向(xiang)恢復屬性。為了縮短二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)反(fan)向(xiang)恢復時(shi)(shi)間，提(ti)高(gao)反(fan)向(xiang)回復軟度，同時(shi)(shi)使(shi)二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)具備較(jiao)高(gao)的(de)(de)(de)(de)(de)耐(nai)壓(ya)，使(shi)用(yong)(yong)了緩(huan)沖層(ceng)構(gou)(gou)造(zao)(zao)(zao)，即運用(yong)(yong)雜(za)(za)質控(kong)制(zhi)技(ji)術由輕摻雜(za)(za)的(de)(de)(de)(de)(de)N1區及較(jiao)重摻雜(za)(za)的(de)(de)(de)(de)(de)N2區構(gou)(gou)成N基(ji)區；二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)正極(ji)(ji)(ji)使(shi)用(yong)(yong)由輕摻雜(za)(za)的(de)(de)(de)(de)(de)P區與(yu)重摻雜(za)(za)的(de)(de)(de)(de)(de)P＋區鑲嵌構(gou)(gou)成，該P－P＋構(gou)(gou)造(zao)(zao)(zao)可以操(cao)縱空穴(xue)的(de)(de)(de)(de)(de)注入效應(ying)，從而達到支配自調節發射效率和(he)(he)縮短反(fan)向(xiang)回復時(shi)(shi)間的(de)(de)(de)(de)(de)目(mu)的(de)(de)(de)(de)(de)。圖(tu)4使(shi)用(yong)(yong)緩(huan)沖層(ceng)構(gou)(gou)造(zao)(zao)(zao)二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)示意圖(tu)芯片(pian)設(she)計原始(shi)硅(gui)片(pian)根據(ju)二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)電(dian)壓(ya)要求(qiu)，同常規低導(dao)通壓(ya)降二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)設(she)計參數相同。使(shi)用(yong)(yong)正三角(jiao)形(xing)P+短路(lu)(lu)點(dian)(dian)構(gou)(gou)造(zao)(zao)(zao)，輕摻雜(za)(za)的(de)(de)(de)(de)(de)P區表面濃(nong)(nong)度約為1017cm－3，短路(lu)(lu)點(dian)(dian)濃(nong)(nong)度約為1019cm－3。陰(yin)極(ji)(ji)(ji)面N1表面濃(nong)(nong)度約為1018cm－3，N2表面濃(nong)(nong)度約為1020cm－3。少(shao)子(zi)壽(shou)命(ming)控(kong)制(zhi)目(mu)前(qian)少(shao)子(zi)壽(shou)命(ming)控(kong)制(zhi)方(fang)式(shi)(shi)(shi)基(ji)本上有(you)三種(zhong)，摻金、摻鉑和(he)(he)輻(fu)(fu)照(zhao)，輻(fu)(fu)照(zhao)也有(you)多種(zhong)方(fang)式(shi)(shi)(shi)，常用(yong)(yong)的(de)(de)(de)(de)(de)方(fang)式(shi)(shi)(shi)是高(gao)能(neng)電(dian)子(zi)輻(fu)(fu)照(zhao)。緩(huan)沖層(ceng)構(gou)(gou)造(zao)(zao)(zao)的(de)(de)(de)(de)(de)迅(xun)速(su)二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)少(shao)子(zi)壽(shou)命(ming)控(kong)制(zhi)方(fang)式(shi)(shi)(shi)是使(shi)用(yong)(yong)金輕摻雜(za)(za)和(he)(he)電(dian)子(zi)輻(fu)(fu)照(zhao)相結合(he)的(de)(de)(de)(de)(de)辦法(fa)(fa)。圖(tu)5緩(huan)沖層(ceng)構(gou)(gou)造(zao)(zao)(zao)的(de)(de)(de)(de)(de)迅(xun)速(su)二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)能(neng)帶示意圖(tu)從能(neng)帶示意圖(tu)中可以看出(chu)，在兩個高(gao)補償(chang)區之間形(xing)成一(yi)個電(dian)子(zi)圈套。當二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)處于反(fan)偏時(shi)(shi)，電(dian)子(zi)從二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)陰(yin)極(ji)(ji)(ji)面抽(chou)走。MUR3040CT二(er)(er)極(ji)(ji)(ji)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)主(zhu)要參數。

20A以(yi)下(xia)的(de)(de)快(kuai)(kuai)(kuai)恢(hui)復(fu)(fu)及超(chao)快(kuai)(kuai)(kuai)恢(hui)復(fu)(fu)二(er)(er)(er)(er)極(ji)(ji)(ji)管(guan)大都使(shi)用(yong)(yong)TO-220封裝(zhuang)形(xing)式(shi)(shi)。從內部構(gou)(gou)造看(kan)，可分為(wei)單(dan)管(guan)、對(dui)管(guan)（亦稱雙(shuang)管(guan)）兩種。對(dui)管(guan)內部涵(han)蓋兩只(zhi)(zhi)快(kuai)(kuai)(kuai)恢(hui)復(fu)(fu)二(er)(er)(er)(er)極(ji)(ji)(ji)管(guan)，根(gen)據兩只(zhi)(zhi)二(er)(er)(er)(er)極(ji)(ji)(ji)管(guan)接法的(de)(de)不同，又(you)有(you)共(gong)(gong)陰對(dui)管(guan)、共(gong)(gong)陽對(dui)管(guan)之(zhi)分。圖(tu)(tu)2(a)是(shi)C20-04型(xing)快(kuai)(kuai)(kuai)恢(hui)復(fu)(fu)二(er)(er)(er)(er)極(ji)(ji)(ji)管(guan)（單(dan)管(guan)）的(de)(de)外形(xing)及內部構(gou)(gou)造。(b)圖(tu)(tu)和(c)圖(tu)(tu)分別(bie)是(shi)C92-02型(xing)（共(gong)(gong)陰對(dui)管(guan)）、MUR1680A型(xing)（共(gong)(gong)陽對(dui)管(guan)）超(chao)快(kuai)(kuai)(kuai)恢(hui)復(fu)(fu)二(er)(er)(er)(er)極(ji)(ji)(ji)管(guan)的(de)(de)外形(xing)與結構(gou)(gou)。它們均(jun)使(shi)用(yong)(yong)TO-220塑料封裝(zhuang)，主要(yao)(yao)技術(shu)指(zhi)標見(jian)表(biao)1。幾十安的(de)(de)快(kuai)(kuai)(kuai)恢(hui)復(fu)(fu)二(er)(er)(er)(er)極(ji)(ji)(ji)管(guan)一(yi)(yi)般(ban)使(shi)用(yong)(yong)TO-3P金屬殼(ke)封裝(zhuang)。更大容量（幾百安～幾千安）的(de)(de)管(guan)子(zi)(zi)則使(shi)用(yong)(yong)螺栓型(xing)或平板型(xing)封裝(zhuang)形(xing)式(shi)(shi)。2．檢測(ce)方法1）測(ce)量反(fan)向(xiang)恢(hui)復(fu)(fu)時(shi)間(jian)測(ce)量電(dian)(dian)(dian)(dian)路(lu)如圖(tu)(tu)3。由(you)直流電(dian)(dian)(dian)(dian)流源供規定(ding)的(de)(de)IF，脈沖發生(sheng)器(qi)經(jing)過隔直電(dian)(dian)(dian)(dian)容器(qi)C加脈沖信號，運(yun)用(yong)(yong)電(dian)(dian)(dian)(dian)子(zi)(zi)示波(bo)器(qi)觀(guan)察到的(de)(de)trr值，即是(shi)從I=0的(de)(de)日子(zi)(zi)到IR=Irr日子(zi)(zi)所(suo)經(jing)歷(li)的(de)(de)時(shi)間(jian)。設器(qi)件內部的(de)(de)反(fan)向(xiang)恢(hui)電(dian)(dian)(dian)(dian)荷(he)(he)為(wei)Qrr，有(you)關系式(shi)(shi)trr≈2Qrr/IRM由(you)式(shi)(shi)()可知，當IRM為(wei)一(yi)(yi)定(ding)時(shi)，反(fan)向(xiang)回(hui)復(fu)(fu)電(dian)(dian)(dian)(dian)荷(he)(he)愈小，反(fan)向(xiang)回(hui)復(fu)(fu)時(shi)間(jian)就愈短(duan)(duan)。2）常規檢測(ce)方式(shi)(shi)在業余條件下(xia)，運(yun)用(yong)(yong)萬用(yong)(yong)表(biao)能(neng)(neng)檢測(ce)快(kuai)(kuai)(kuai)回(hui)復(fu)(fu)、超(chao)快(kuai)(kuai)(kuai)恢(hui)復(fu)(fu)二(er)(er)(er)(er)極(ji)(ji)(ji)管(guan)的(de)(de)單(dan)向(xiang)導(dao)電(dian)(dian)(dian)(dian)性，以(yi)及內部有(you)無開路(lu)、短(duan)(duan)路(lu)故障，并能(neng)(neng)測(ce)出(chu)正向(xiang)導(dao)通壓(ya)降。若配以(yi)兆歐表(biao)，還能(neng)(neng)測(ce)量反(fan)向(xiang)擊穿電(dian)(dian)(dian)(dian)壓(ya)。實(shi)例：測(ce)量一(yi)(yi)只(zhi)(zhi)超(chao)快(kuai)(kuai)(kuai)恢(hui)復(fu)(fu)二(er)(er)(er)(er)極(ji)(ji)(ji)管(guan)，其主要(yao)(yao)參數為(wei)：trr=35ns。MUR1620CA是(shi)什么類型(xing)的(de)(de)管(guan)子(zi)(zi)？ITO220封裝(zhuang)的(de)(de)快(kuai)(kuai)(kuai)恢(hui)復(fu)(fu)二(er)(er)(er)(er)極(ji)(ji)(ji)管(guan)MURF860

整流(liu)快恢(hui)復二極(ji)管緩沖(chong)吸收電路有(you)哪些(xie)？ITO220封裝的快恢(hui)復二極(ji)管MUR1660CA

我們都知道快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)有(you)(you)個(ge)反(fan)(fan)(fan)(fan)(fan)向(xiang)擊(ji)(ji)穿(chuan)的(de)(de)(de)(de)(de)極限(xian)電(dian)(dian)(dian)壓(ya)(ya)(ya)，絕(jue)大(da)多數(shu)的(de)(de)(de)(de)(de)快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)廠商都沒把它寫入數(shu)據手冊，但(dan)(dan)在(zai)大(da)多數(shu)情況下(xia)(xia)為(wei)了節省(sheng)成本不(bu)可(ke)能將快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)反(fan)(fan)(fan)(fan)(fan)向(xiang)耐壓(ya)(ya)(ya)降額(e)(e)到50%左右(you)使(shi)用(yong)(yong)，那(nei)么反(fan)(fan)(fan)(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)(ya)裕(yu)量(liang)(liang)是否(fou)足(zu)夠，這對評估該快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)反(fan)(fan)(fan)(fan)(fan)向(xiang)耐壓(ya)(ya)(ya)應降多少額(e)(e)使(shi)用(yong)(yong)較為(wei)安全是有(you)(you)一定意義的(de)(de)(de)(de)(de)。從(cong)下(xia)(xia)表中可(ke)看(kan)出，反(fan)(fan)(fan)(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)裕(yu)量(liang)(liang)并不(bu)像(xiang)網上所(suo)說的(de)(de)(de)(de)(de)那(nei)樣是額(e)(e)定反(fan)(fan)(fan)(fan)(fan)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)2~3倍(bei)。膝(xi)(xi)點(dian)(dian)反(fan)(fan)(fan)(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)(ya)為(wei)漏(lou)電(dian)(dian)(dian)流(liu)突(tu)(tu)變時的(de)(de)(de)(de)(de)反(fan)(fan)(fan)(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)(ya)點(dian)(dian)。（快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)在(zai)常(chang)溫某(mou)電(dian)(dian)(dian)壓(ya)(ya)(ya)點(dian)(dian)下(xia)(xia)，其漏(lou)電(dian)(dian)(dian)流(liu)突(tu)(tu)然一下(xia)(xia)增大(da)了幾十(shi)上百倍(bei)，例如：某(mou)快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)在(zai)78V時漏(lou)電(dian)(dian)(dian)流(liu)為(wei)20μA，但(dan)(dan)在(zai)79V時漏(lou)電(dian)(dian)(dian)流(liu)為(wei)2mA，79V即(ji)為(wei)膝(xi)(xi)點(dian)(dian)反(fan)(fan)(fan)(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)(ya)）膝(xi)(xi)點(dian)(dian)反(fan)(fan)(fan)(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)(ya)雖然未使(shi)快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)完全擊(ji)(ji)穿(chuan)，但(dan)(dan)卻嚴重影響了快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)正常(chang)使(shi)用(yong)(yong)。而在(zai)高溫下(xia)(xia)漏(lou)電(dian)(dian)(dian)流(liu)更易突(tu)(tu)變，此時的(de)(de)(de)(de)(de)膝(xi)(xi)點(dian)(dian)反(fan)(fan)(fan)(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)(ya)就更低(di)(di)。所(suo)以一個(ge)快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)反(fan)(fan)(fan)(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)(ya)應降額(e)(e)值為(wei)多少才較為(wei)正確(que)合理，更應該從(cong)物料(liao)的(de)(de)(de)(de)(de)使(shi)用(yong)(yong)環(huan)境(jing)溫度和實際使(shi)用(yong)(yong)的(de)(de)(de)(de)(de)導通電(dian)(dian)(dian)流(liu)來(lai)測試膝(xi)(xi)點(dian)(dian)反(fan)(fan)(fan)(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)(ya)值，然后再來(lai)確(que)定裕(yu)量(liang)(liang)降額(e)(e)值。好的(de)(de)(de)(de)(de)電(dian)(dian)(dian)路設計在(zai)對快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)參數(shu)的(de)(de)(de)(de)(de)選擇時，不(bu)僅(jin)要(yao)考(kao)慮(lv)常(chang)溫的(de)(de)(de)(de)(de)參數(shu)，也(ye)要(yao)考(kao)慮(lv)在(zai)高低(di)(di)溫環(huan)境(jing)下(xia)(xia)的(de)(de)(de)(de)(de)一些(xie)突(tu)(tu)變參數(shu)。知道快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)這些(xie)特性關系往(wang)(wang)往(wang)(wang)會給工程師的(de)(de)(de)(de)(de)選管(guan)(guan)(guan)(guan)(guan)以及電(dian)(dian)(dian)路故障的(de)(de)(de)(de)(de)分析帶來(lai)事半功(gong)倍(bei)的(de)(de)(de)(de)(de)效果。ITO220封裝的(de)(de)(de)(de)(de)快(kuai)(kuai)恢(hui)(hui)(hui)(hui)復(fu)(fu)(fu)(fu)二(er)(er)(er)極管(guan)(guan)(guan)(guan)(guan)MUR1660CA

本(ben)文來自四川精碳偉業環(huan)保科技有限責任(ren)公司：//wasul.cn/Article/64b39499541.html