基于EXB841的IGBT驅(qū)動(dòng)與保護(hù)電路研究
作者：曹書強(qiáng) 上傳時(shí)間：2009/2/7 16:15:25
摘要：本文敘述了絕緣柵雙極型晶體管IGBT對(duì)驅(qū)動(dòng)和保護(hù)電路的要求。并簡(jiǎn)要介紹了IGBT專用驅(qū)動(dòng)芯片EXB841的驅(qū)動(dòng)原理，進(jìn)而針對(duì)EXB841典型IGBT驅(qū)動(dòng)保護(hù)中存在的不足，提出了采用過流檢測(cè)電路精確調(diào)整過流閾值，延遲電路識(shí)別虛假過流和過流鎖定，采用外部成型電路提高負(fù)柵壓和系統(tǒng)應(yīng)用中及時(shí)的故障顯示等改進(jìn)方法。設(shè)計(jì)了相應(yīng)的優(yōu)化驅(qū)動(dòng)電路，優(yōu)化驅(qū)動(dòng)電路在脈沖發(fā)生電源中得到應(yīng)用。實(shí)際運(yùn)行表明優(yōu)化驅(qū)動(dòng)電路克服了EXB841典型驅(qū)動(dòng)的不足，改善了IGBT的驅(qū)動(dòng)與保護(hù)性能，具有很好的實(shí)用性。
敘詞：IGBT EXB841 驅(qū)動(dòng)電路 故障顯示
Abstract：This paper introduced the require of driving and protecting circuit for IGBT and gave a brief description of the Working principle of EXB841 that the special driving chip of IGBT. Based on the shortages of EXB841s typical driving circuit for IGBT, some effective countermeasures ,which included the over protection detecting circuit to modulate accurately over protection threshold , and the identifying and locking circuit of over-current malfunction to identify false over-current and to lock over-current , the external grid-voltage molding circuit to boost grid-voltage were put forward , and an optimum driving circuit was designed . The optimum dring circuit has been used in the pulse power of High-frequency and High-voltage . And the experiment result have proved that the optimum circuit not only overcomes the defects of EXB841 , but also improves greatly IGBTs driving and protection capability . As a result , the optimum circuit will have considerable value in practical application.
Keyword：IGBT, EXB841, Driving circuit, Fault display
說明：本站會(huì)員正確輸入用戶名和密碼進(jìn)行登錄系統(tǒng)后才能查看文章詳細(xì)內(nèi)容和參與評(píng)論。
－－本文摘自《電源世界》，已被閱讀3593次
免責(zé)聲明：本文僅代表作者個(gè)人觀點(diǎn)，與電源在線網(wǎng)無關(guān)。其原創(chuàng)性以及文中陳述文字和內(nèi)容未經(jīng)本站證實(shí)，對(duì)本文以及其中全部或者部分內(nèi)容、文字的真實(shí)性、完整性、及時(shí)性本站不作任何保證或承諾，請(qǐng)讀者僅作參考，并請(qǐng)自行核實(shí)相關(guān)內(nèi)容。
：0755-82905460 郵箱 
：關(guān)于本文的網(wǎng)友評(píng)論：
本文暫時(shí)還沒有網(wǎng)友發(fā)表評(píng)論信息！
文章檢索