本論文研製一具寬輸入電壓範圍之直流-直流轉換模組，一般之直流轉換器因為責任週期的限制，也同樣限制了輸入電壓之範圍，而本論文將一降壓式轉換器串聯於主動箝位順向式轉換器前面，能夠使輸入範圍增大；而為了縮小體積，本論文使用鋁基板來減少佈線的面積，也使用平板變壓器以及SMD來減少元件的體積。而本論文將會對主動箝位順向式轉換器作分析以及設計，再說明如何增加輸入電壓範圍，最後實作一台輸入電壓範圍14V到160V，輸出電壓12V，輸出功率100瓦之直流-直流轉換模組，而此模組最高效率可達90%。

This thesis presents the implementation of a wide-input-range voltage DC-DC converter. Generally , the input voltage of a converter will be limited by duty cycle. But this thesis series a buck converter in front of an active clamp forward. The input voltage range will be larger than a normal active clamp forward converter. In addition, the PCB is made of aluminum for smaller layout. And the volume were decreased be by using planer transformer and SMD component. The operating principle of the active clamp forward converter has been analyzed in detail and describe how to make the input voltage be larger. And, implements a DC-DC converter module which is designed as input voltage range from 14 V to 160 V with an output voltage of 12V and an output power of 100 W. And the measured power efficiency is 90%.

[1]吳義利，切換式電源轉換器原理與實用設計，第二版，台北：文笙書局，
2015年
[2]呂文隆，交換式電源設計，第三版，台北：全華圖書，2012年
[3]C. P. Henze, H. C. Martin and D. W. Parslet, “Zero-voltage
switching in high frequency power converters using pulse width
modulation,” IEEE 3rd Annual Applied Power Electronics
Conference and Exposition, 1988, pp. 33-40.
[4]K. H. Liu and F. C. Lee, “Zero-voltage switching technique in
DC/DC converters,” in Proc. IEEE 17th Annual Power Electronic
Specialists Conference, 1986, pp. 58-70.
[5]Pavel V. Morozov, “Controllable converters for high-speed
railways traction transformers,” in Proc. IEEE 13th
International Scientific-Technical Conference on Actual
Problems of Electronics Instrument Engineering, 2016, pp. 52-
54.
[6]必維國際檢驗集團，鐵道電子設備測試與認證服務，
http://www.bureauveritas-
adt.com/files/Railway%20solution_ch.pdf
[7]Network Technologies Inc., ENC50155 railways application，
http://www.networktechinc.com/pdf/m12vga-extender-railway.pdf
[8]M. T. Quirke, J. J. Barrett and M. Hayes, “Planar magnetic
component technology-a review,” IEEE Transactions on Components
, Hybrids, and Manufacturing Technology, vol. 15, no. 5, pp.
151-157, Oct. 1992.
[9]C. Quinn, K. Rinne, T. O'Donnell, M. Duffy, and C. O. Mathuna,
“A review of planar magnetic techniques and technologies,” in
Proc. IEEE 16th Annual Applied Power Electronics Conference and
Exposition, Mar. 2001, pp. 1175-1183
[10]Gordon Lee, Jack Lin, “The introduction of high heat
dissipation material,” in Proc. IEEE 4th International
Microsystems , Packing , Assembly and Circuits Technology
Conference, Oct. 2009, pp 240-243.
[11]C. J. Chen and H. C. Chang “Analysis and implementation of
low-side active clamp forward converter with synchronous
rectification,” in Proc. IEEE 33rd Annual Conference of the
IEEE Industrial Electronic Society , Nov. 2007, pp. 1506-1511.
[12]TI Inc., “TL494 pulse-width-modulation control circuits,”
Available: http://www.ti.com/lit/ds/symlink/tl494.pdf, Mar.
2017
[13]AVAGO Inc.,“2.5Amp ouput current IGBT gate driveroptocoupler,”
Available:http://www.jameco.com/Jameco/Products/ProdDS/1550469.pdf, Feb. 2008.
[14]TI Inc. ,“LM5026 active clamp current mode PWM controller
datasheet,” Available:
http://www.ti.com/lit/ds/symlink/lm5026.pdf, Nov.2015.
[15]TI Inc., “TPS28225 high-frequency 4-A sink synchronous MOSFET
drivers,” Available:
http://www.ti.com/lit/ds/symlink/tps28225.pdf, May. 2006.
[16]TI Inc., “ISO742x low-power dual channel digital isolator,”
Available: http://www.ti.com/lit/ds/symlink/iso7420e.pdf, Jul.
2015.
[17]TI Inc., “Power loss calculation with common source inductance
consideration for synchronous buck converters,” Available:
http://www.tij.co.jp/jp/lit/an/slpa009a/slpa009a.pdf, Jul.
2011.
[18]盛瀅瑾，非線性轉換比主動箝位順向式轉換器之研製，國立台灣科技大學電子
工程系，2013年
[19]D. Maksimovic and S. Cuk, “Switching converters with wide DC
converter,” in Proc. IEEE Transactions on Power Electronics,
vol. 6, no. 1, pp. 151-157, Jan. 1991.
[20]徐聖堯，具同步整流之主動箝位順向式轉換器之研究，國立台灣海洋大學，
2010年
[21]安美森半導體，雙開關順向式轉換器及其應用設計，
http://www.onsemi.com/pub/Collateral/TND378-D.PDF
[22]TI Inc., “Understanding and Designing an Active Clamp Current
Mode Controlled Converter Using the UCC2897A,” Available:
http://www.ti.com/lit/an/slua535/slua535.pdf, May. 2010