臺灣博碩士論文加值系統

本論文研製一個具有零電壓切換之主動箝位轉換器，利用主動箝位技術來取代傳統的洩磁繞組以及RCD被動箝位電路，並且可以將變壓器的激磁電感及漏電感的儲能再次的重複利用，以提高轉換器的效率，另一方面，主動箝位電路可以幫助主開關達到零電壓切換，以降低主功率開關的切換損失，並且，克服了工作週期不得高於50 %的限制。
同時為了提高效率，在輸出端採用導通電阻極低的MOSFET來做同步整流(synchronous rectifier，SR)，並且利用變壓器的二次側電壓來驅動MOSFET，降低驅動電路設計的複雜度。最後本文提出針對零電壓主動箝位與同步整流順向式與返馳式轉換器的設計，並實際設計交流輸入電壓90Vac~132Vac，直流輸出為5V/20A的交流對直流轉換器（AC/DC converter）。

The objective of this thesis is to design and implementation of Zero-Voltage-Switching Converter with Active-Clamp topology. The energy stored in the magnetizing and leakage inductance can be retrieved to improve the efficiency by the active-clamped circuit. On the other hand, the active-clamp circuit can help the main switch to be operated at zero voltage switch, in order to reduce the switching losses of main switch.
In order to increase the efficiency, a synchronous rectifier is adopted by using MOSFET with low Rds(ON) at the output end. The drive signal of synchronous rectifier switch is come from the transformer secondary side voltage in order to reduce the complexity of driven circuit designed.
Finally, the design of the zero-voltage-switch Forward and Flyback converters with active clamp reset and synchronous rectification are proposed. A design example of AC/DC converter, whose input range from 90Vac~132Vac and the output 5V/20A is presented.

中文摘要 --------------------------------------------------------------------------- i
英文摘要 --------------------------------------------------------------------------- ii
誌謝 --------------------------------------------------------------------------- iii
目錄 --------------------------------------------------------------------------- iv
表目錄 --------------------------------------------------------------------------- vi
圖目錄 --------------------------------------------------------------------------- vii
符號說明 --------------------------------------------------------------------------- xii
第一章 緒論--------------------------------------------------------------------- 1
1-1 前言--------------------------------------------------------------------- 1
1-2 章節概述--------------------------------------------------------------- 2
第二章 基本隔離與非隔離型轉換器--------------------------------------- 4
2-1 基本非隔離型轉換器(Non-isolated converter)-------------------- 4
2-2 基本隔離型轉換器(Isolated converter)---------------------------- 5
2-2-1 順向式轉換器連續導通模式之穩態分析------------------------ 6
2-2-2 返馳式轉換器連續導通模式之穩態分析------------------------ 12
第三章 主動箝位技術(Active Clamp)--------------------------------------- 18
3-1 硬式切換(Hard Switch)----------------------------------------------- 18
3-2 主動箝位電路(軟切)------------------------------------------------- 20
第四章 同步整流(Synchronous Rectifier)技術------------------------------ 21
第五 章 主動箝位與同步整流技術應用在順向式轉換器(FORWARD CONVERTER)--------------------------------------------------------- 22
5-1 基本架構說明--------------------------------------------------------- 22
5-2 電路動作分析--------------------------------------------------------- 23
5-2-1 Mode-1 : [t0~t1]-------------------------------------------------------- 24
5-2-2 Mode-2 : [t1~t2]-------------------------------------------------------- 25
5-2-3 Mode-3 : [t2~t3]-------------------------------------------------------- 27
5-2-4 Mode-4 : [t3~t4]-------------------------------------------------------- 29
5-2-5 Mode-5 : [t4~t5]-------------------------------------------------------- 31
5-2-6 Mode-6 : [t5~t6]-------------------------------------------------------- 33
5-2-7 Mode-7 : [t6~t7]-------------------------------------------------------- 35
5-2-8 Mode-8 : [t7~t8]-------------------------------------------------------- 37
5-2-9 Mode-9 : [t8~t9] ------------------------------------------------------- 39
5-2-10 Mode-10 : [t9~t0] ------------------------------------------------------ 40
5-3 實驗波形(所有圖檔於110V輸入，100W輸出量測)---------- 42
5-4 實驗數據--------------------------------------------------------------- 53
5-4-1 硬式切換不同輸入電壓效率分析--------------------------------- 53
5-4-2 軟切，輸出為二極體整流，不同輸入電壓效率分析------------ 54
5-4-3 軟切，輸出為同步整流，不同電壓效率分析--------------------- 55
第六章 主動箝位與同步整流技術應用在返馳式轉換器(FLY-BACK CONVERTER)--------------------------------------------------------- 58
6-1 基本架構說明--------------------------------------------------------- 58
6-2 電路動作分析--------------------------------------------------------- 59
6-2-1 Mode-1 : [t0~t1]-------------------------------------------------------- 60
6-2-2 Mode-2 : [t1~t2]-------------------------------------------------------- 61
6-2-3 Mode-3 : [t2~t3]-------------------------------------------------------- 63
6-2-4 Mode-4 : [t3~t4]-------------------------------------------------------- 65
6-2-5 Mode-5 : [t4~t5]-------------------------------------------------------- 67
6-2-6 Mode-6 : [t5~t6]-------------------------------------------------------- 69
6-2-7 Mode-7 : [t6~t7]-------------------------------------------------------- 70
6-3 實驗波形(所有圖檔於110V輸入，100W輸出量測)---------- 71
6-4 實驗數據--------------------------------------------------------------- 81
6-4-1 硬式切換不同輸入電壓效率分析--------------------------------- 81
6-4-2 軟切，輸出為二極體整流，不同輸入電壓效率分析------------ 82
6-4-3 軟切，輸出為同步整流，不同電壓效率分析--------------------- 83
第七章 結論--------------------------------------------------------------------- 86
參考文獻 --------------------------------------------------------------------------- 87
附錄A 實作硬體電路實體照片--------------------------------------------- 91
自傳 --------------------------------------------------------------------------- 92

[1]GEORGE C. CHRYSSIS著, 梁適安譯, “高頻交換式電源供應器”, 第二版, 華科技圖書股份有限公司, 1995年.
[2]Acik, A.; Cadirci, I., “Active clamped ZVS forward converter with soft-switched synchronous rectifier for maximum efficiency operation”, Power Electronics Specialists Conference, 1998.PESC 98 Record.29th Annual IEEE, Volume:2, 17-22 May 1998, Pages:1237-1242.
[3]Park, D.H.; Kim, H.J.; Sun, Y.S., “A development of the off-line active clamp ZVS forward converter for telecommunication applications”, Telecommunications Energy Conference, 1997.INTELEC `97., 19th International, 19-23 Oct. 1997, Pages:271-276.
[4]Jinno, M.; Jiann-Chern Sheen; Po-Yuan Chen, “Effects of magnetizing inductance on active-clamped forward converters”, Telecommunications Energy Conference, 2003. INTELEC `03. The 25th International, 19-23 Oct. 2003, Pages:636-642.
[5]Qiong Li; Lee, F.C.; Jovanovic, M.M., “Design considerations of transformer DC bias of forward converter with active-clamp reset”, Applied Power Electronics Conference and Exposition, 1999.APEC `99. Fourteenth Annual, Volume: 1, 14-18 March 1999, Pages:553-559.
[6]Jovanovic, M.M.; Zhang, M.T.; Lee, F.C., “Evaluation of synchronous-rectification efficiency improvement limits in forward converters”, Industrial Electronics, IEEE Transactions on, Volume:42, Issue:4, Aug. 1995, Pages:387-395.
[7]Ji, H.K.; Kim, H.J., “Active clamp forward converter with MOSFET synchronous rectification”, Power Electronics Specialists Conference, PESC `94 Record., 25th Annual IEEE, 20-25 June 1994, Pages:895-901.
[8]Zhang, M.T.;Lee, F.C., “Commutation analysis of self-driven synchronous rectifiers in an active-clamp forward converter”, Power Electronics Specialists Conference, 1996.PESC `96 Record., 27th Annual IEEE, Volume:1, 23-27 June 1996, Pages:868-873.
[9]梁適安著, “交換式電源供給器之理論與實務設計”, 初版五刷, 全華科技圖書股份有限公司, 2001年.
[10]溫坤禮、陳德超譯, “最新交換式電源技術”, 全華科技圖書股份有限公司, 90年8月.
[11]Lim, B.S.; Lee, K.W.; Woo, S.H.; Hee Jun Kim, “A new self-driven active clamp forward converter using the auxiliary winding of transformer”, Telecommunications Energy Conference, 2002. INTELEC. 24th Annual International, 29 Sept. -3 Oct. 2002, Pages:164-168.
[12]Li, Q.M.;Lee, F.C., “Design consideration of the active-clamp forward converter with current mode control during large-signal transient”, Power Electronics, IEEE Transactions on Volume 18, Issue 4, July 2003 Page(s):958-965.
[13]Li, Q.M.;Lee, F.C.; Jovanovic, M.M., “Large-signal transient analysis of forward converter with active-clamp reset”, Power Electronics, IEEE Transactions on Volume 17, Issue 1, Jan. 2002 Page(s):15-24.
[14]Bum-Sun Lim;Hee-Jun Kim;Won-Sup Chung, “A self-driven active clamp forward converter using the auxiliary winding of the power transformer”, Circuits and Systems II: Express Briefs,IEEE Transactions on [see also Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on] Volume 51, Issue 10, Oct. 2004 Page(s):549-551.
[15]鄭振東譯, “新型柔性切換式電源技術入門”,全華科技圖書股份有限公司, 89年12月.
[16]Sakai, E.;Harada, K., “Synchronous rectifier for low voltage switching converter”, Telecommunications Energy Conference, 1995. INTELEC `95., 17th International, 29 Oct. -1 Nov. 1995, Pages:471-475.
[17]Zhang, M.T.;Jovanovic, M.M.;Lee, F.C.Y., “Design considerations and performance evaluations of synchronous rectification in flyback converters”, Power Electronics, IEEE Transactions on Volume 13, Issue 3, May 1998 Page(s):538-546.
[18]Tuomainen, V.;Kyyra, J., “Effect of resonant transition on efficiency of forward converter with active clamp and self-driven SRs”, Power Electronics, IEEE Transactions on Volume 20, Issue 2, March 2005 Page(s):315-323.
[19]Acik, A.;Cadirci, I., “Active clamped ZVS forward converter with soft-switched synchronous rectifier for high efficiency, low output voltage applications”, Electric Power Applications, IEE Proceedings- Volume 150, Issue 2, March 2003 Page(s):165-174.
[20]Fontan, A.;Ollero, S.;de la Cruz, E.;Sebastian, J., “Peak current mode control applied to the forward converter with active clamp”, Power Electronics Specialists Conference, 1998.PESC 98 Record. 29th Annual IEEE Volume 1, 17-22 May 1998 Page(s):45-51.
[21]Young Ki Oh;Sung Kyo Park;Byoung Hwan Lim;Chong Baek Park, “Improvement of characteristics of active-clamped ZVS forward converter with a synchronous rectifier”, Industrial Electronics Society, 2004. IECON 2004. 30th Annual Conference of IEEE Volume 1, 2-6 Nov. 2004 Page(s):63-67.
[22]Byoung Hwan Lim;Sung Kyo Park;Young Ki Oh;Chong Baek Park, “Improvement of characteristics of active-clamped ZVS forward converter with a synchronous rectifier for high efficiency”, TENCON 2004. 2004 IEEE Region 10 Conference Volume D,Nov. 21-24, 2004 Page(s):89-92.
[23]Cobos, J.A.;Garcia, O.;Sebastian, J.;Uceda, J., “Active clamp PWM forward converter with self driven synchronous rectification”, Telecommunications Energy Conference, 1993. INTELEC `93. 15th International Volume 2, 27-30 Sept. 1993 Page(s):200-206.
[24]林靜如, “主動箝位電路在順向式轉換器的特性分析及研製”, 國立台灣科技大學, 2001年, 碩士論文.
[25]Librizzi, F., “AC/DC flyback converter with synchronous rectification”, Power Semiconductor Devices and ICs, 2004. Proceedings. ISPSD `04. The 16th International Symposium on 24-27 May 2004 Page(s):63-66.
[26]Watson, R.;Lee, F.C.;Hua, G.C., “Utilization of an active-clamp circuit to achieve soft switching in flyback converters”, Power Electronics, IEEE Transactions on, Volume: 11, Issue:1, Jan. 1996, Pages:162-169.
[27]Watson, R.;Lee, F.C.;Hua, G.C., “Utilization of an active-clamp circuit to achieve soft switching in flyback converters”, Power Electronics Specialists Conference,PESC `94 Record., 25th Annual IEEE, 20-25 June 1994, Pages:909-916.
[28]Xuefei Xie;Liu, J.C.P.L.;Poon, F.N.K.;Man Hay Pong, “Current-driven synchronous rectification technique for flyback topology”, Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual, Volume:1, 17-21 June 2001, Pages:345-350.
[29]Daniel W. Hart著,王順忠譯, “電力電子學”, 東華書局股份有限公司, 87年2月.
[30]Abraham I. Pressman, “Switching Power Supply Design”, McGRAW-HILL INTERNATIONAL, Second Edition, 1999年.
[31]吳財福;余德鴻, “電子安定器綜論”,全華科技圖書股份有限公司, 84年8月.
[32]黃士榮, “零電壓切換之直流電源供應器分析與製作”, 國立雲林科技大學, 2004年, 碩士論文.
[33]翁尚文, “返馳式轉換器之柔性切換研究”, 國立高雄應用科技大學, 2003年, 碩士論文.