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研究生:陳威桓
論文名稱:功率整流器反向回復特性之研究
論文名稱(外文):The Research of Power Rectifier's Reverse Recovey Characterization
指導教授:龔正龔正引用關係
指導教授(外文):Prof. Jeng Gong
學位類別:碩士
校院名稱:國立清華大學
系所名稱:電子工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2005
畢業學年度:93
語文別:中文
論文頁數:69
中文關鍵詞:反向回復切換速度硬切換軟切換反向回復時間
外文關鍵詞:reverse recoverydi/dthard-switchingsoft-switchingreverse recovery time
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摘要
功率半導體元件在現今社會上是不可或缺的電子元件,整流器的發展也日新月異。而其最重要的特性之一,是在動態切換時的反向回復特性,因為反向回復過程產生的電壓或電流突波,容易造成應用電路的損毀,針對此一特性深入探討,以方便使用者選擇整流器之優劣,如此用以保護整體的電路。
利用三種不同之量測電路,比較整流器的切換速度及反向回復特性。(1.) Clamped inductive switching circuit測試電路:方便使用者簡易了解整流器反向回復特性之優劣;(2.) Hard-switching dc-dc buck converter測試電路:更進一步強化測試電路,使使用者可以簡易調變不同的測試環境,用以客觀比較不同整流器的反向回復能力之優劣;(3.) Soft-switching dc-dc buck converter測試電路:簡易外加振盪電容與振盪電感改變Hard-switching dc-dc buck converter之測試電路結構,除了了解整流器本身特性,可以利用電路降低反向電壓電流突波對電路的破壞程度。
現今各界對反向回復時間之定義方式各有不同,針對不同的反向回復時間定義,討論其對整流器 與 之影響,並尋找出最適合之時間定義,方便使用者明確辨別整流器之優劣,如此可省去親自量測之步驟。
ABSTRACT
One of the most important characterization of rectifiers is the reverse recovery characteristic. We had to avoid the current and voltage overshoot caused by reverse recovery process damaging the circuit component.
Using three testing circuit to compare the switching speed and the reverse recovery characteristic of rectifiers. First is the clamped inducitive switching circuit , discriminating is easy discriminating between good and bad of recovery characteristics. Second, Hard-
Switching circuit make the comparison of rectifiers recovery ability easy by lightly adjustments of testing conditions. Final, soft-switching circuit is flexibly modified from hard-switching to ZVC by addition of a resonant capacitor and a resonant inductor, Show us the advantages of ZVC is protecting the circuit configuration.
Discussing the influence of Trr and Qrr by the different definitions of the reverse recovery time, servicing all the rectifiers user clearly to make out good and bad of recovery characteristics without measuring personally.
目 錄
第一章、研究動機.........................................1

第二章、Device的發展與結構...............................2
2.1 功率元件的應用與發展............................2
2.2 整流器的種類及演進..............................4
2.2.1 低電壓整流器..............................4
2.2.2 高電壓整流器..............................5
2.3 蕭基整流器的結構及操作原理......................7
2.3.1 金屬半導體接觸面..........................7
2.3.2 順偏導通特性..............................8
2.3.3 反向阻隔特性.............................10
2.3.4 Trade-off 曲線...........................11
2.3.5 功率損耗.................................12
2.4 P-i-N整流器的結構及操作原理....................13
2.4.1 P-i-N整流器結構..........................13
2.4.2 順偏導通特性.............................14
2.4.3 反偏特性.................................16
2.4.4 反向回復特性.............................16

第三章、反向回復時間之定義及測試電路比較................24
3.1 反向回復時間之規格比較.........................24
3.2 反向回復過程之參數定義.........................25
3.2.1 反向回復電荷之定義.......................25
3.2.2 反向回復時間之定義.......................26
3.3 反向回復時間之測試電路比較.....................31
3.3.1 測式電路(I):CIS Circuit.................31
3.3.2 測式電路(II):JEDEC Standard.............32
3.3.3 測式電路(III):Hard-Switching Circuit....33
3.3.4 測式電路(VI):Soft-Switching Circuit.....37

第四章、反向回復時間之量測結果..........................45
4.1 CIS Circuit之量測結果..........................45
4.2 Hard-switching Circuit之量測結果...............46
4.2.0 Hard-switching Circuit之公式驗證.........46
4.2.1 IF與di/dt之關係..........................47
4.2.2 RG與di/dt之關係..........................48
4.2.3 不同功率開關之比較.......................49
4.2.4 不同DUT Trr 之差異.......................50
4.3 Soft-switching Circuit之量測結果...............51
4.3.1 Lres與di/dt之關係........................51
4.4 反向回復時間...................................53
4.4.1 Trr之定義比較............................53
4.4.2 Qrr與Trr之關係...........................55
4.4.3 Hard-switching Circuit與通用公司之比較...57

第五章、結 論..........................................66

參考文獻................................................67
參考文獻
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[22] Alberto Guerra, Kphji Andoh, Silvestro Fimiani, “Ultra-fast Recovery Diodes Meet Today’s Requirement for High Frequency Operation and Power Ratings in SMPS Applications,” International Rectifier.

[23] “IRF 16CTU04 datasheet” International Rectifier.
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