本論文以具有零電流切換之雙開關順向式電源轉換器為主體，簡介使用之準諧振切換技術，分析與設計其元件參數值，並調整諧振槽之電感，降低重載時之電路切換頻率與輸出二極體上之電流峰值，提升轉換器效率並減少切換頻率之變化量。最後實際研製一雙級式電源轉換器，前級使用升壓式功因修正電路，並輔以零電流切換雙開關順向式轉換器為後級，輸入交流電壓範圍為90 V～264 V，輸出電壓48 V、輸出功率384 W，藉以驗證理論參數值之正確性。

In this thesis, a zero-current-switching two-switch forward converter is presented. The variable-inductor in the resonant bank is used to reduce the switching losses and the peak value of output-diode current. Namely, the system-efficiency can be improved. Moreover, the operating principle and the design criteria are discussed in detailed. Finally, a prototype two-stage circuit is implemented to verify the performance. The front-stage is a boost converter with power-factor-correction(PFC) function and the second-stage is the proposed circuit with input voltage 90-264 V, output voltage 48 V, and output power 384 W.

[1] A. I. Pressman, Switching power supply design, McGraw-Hill Inc., 1998.
[2] N. Mohan, T. M. Undeland, and W. P. Robbins, Power Electronics: Converters, Applications and Design, Second Edition, John Wiley & Sons, 1995.
[3] D. J. Ionel and C. George, “High efficiency DC-DC converter,” IEEE Proc. on APEC, vol. 2, pp. 638-644, 1994.
[4] R. W. Erickson and D. Maksimovic, Fundamentals of power electronics, Kluwer Academic Publishers, 2000.
[5] S. S. Ang, Power Supply Cookbook, Second Edition, Butterworth-Heinemann, 2001.
[6] K. Chen and T. A. Stuart, “A study of IGBT turn-off behavior and switching losses for zero-voltage and zero-current switching,” IEEE Proc. on APEC, pp. 411-418, Feb. 1992.
[7] B. Andreycak, “Zero voltage switching resonant power conversion,” U-138, Texas Instruments, 1999.S. S. Ang, Power switching converters, Marcel Dekker, Inc. 1995.
[8] F. C. Lee, “High-frequency quasi-resonant converter technologies,” IEEE Invited Paper, vol. 76, no. 4, pp. 377-390, Apr. 1988.
[9] I. Barbi, J. C. O. Balacell, D. C. Martins, and F. B. Libano, “Buck quasi-resonant converter operating at constant frequency analysis, design and experimentation,” IEEE Trans. on Power Electronics, vol. 5, no. 3, pp.276-283, Jul. 1990.
[10] Electromagnetic Compatibility (EMC) — Part3：Limits section II：Limits for harmonic current emissions (Equipment input current 16A per phase), IEC 1000-3-2, 1st ed, 1995.
[11] 溫榮弘譯，「Power MOSFET應用技術」，初版，全華科技圖書，民國九十三年。
[12] 梁適安著，「交換式電源供給器之理論與實務設計」，初版，全華科技圖書，民國八十六年。
[13] Z. Yang and P. C. Sen, “Recent Developments in High Power Factor Switch-Mode Converters,” IEEE Proc. on ECE’98, vol. 2, pp. 477-480, May 1998.
[14] C. Zhou, M. M. Jovanovic, “Design trade-offs in continuous current-mode controlled boost power-factor correction circuits,” International High-Frequency Power Conversion Conf., pp 209-220, 1992.
[15] P. B. Christophe, Switch-mode power supplies: spice simulations and practical designs, McGraw-Hill Inc., 2008.
[16] C. Zhou, R. B. Ridley, and F. C. Lee, “Design and analysis of a hysteretic boost power factor correction circuit,” IEEE Proc. on PESC, pp. 800-807, 1990.
[17] R. W. Erickson and D. Maksimovic, Fundamental of power electronics, Second Edition, Kluwer academic publishers, 2001.
[18] F. D. Tan, “The forward converter : from the classic to the contemporary,” IEEE Proc. on APEC’02, vol. 2, pp. 857-863, March 2002.
[19] P. Vinciarelli, “Optimal Resetting of the Transformer’s Core in Dingle Ended Forward Converters,” U.S. Patent No. 4,441,146, April. 3, 1984.
[20] 廖敏淳，“主動箝位順向式轉換器與非對稱半橋轉換器之比較”，國立成功大學電機工程學系碩士論文，民國九十四年六月。
[21] Chwirka, S., “Using simulation for design validation of switching power converters, ” IEEE 37th Midwest Sympoisum on Circuits and Systems, vol. 1, pp. 701-707, Aug. 1994.
[22] J. Xu, V. Caliskan, and C.Q. Lee, “Transient time-domain analysis of zero-current switching quasi-resonant converters,” IEEE APEC, pp. 1028-1034, Feb. 1994.
[23] W. C. Ho and M. H. Pong, “Power loss and efficiency analysis of quasi-resonant converters,” IEEE Proc. on IECON, pp. 842-847, Nov. 1993.
[24] R. J. Wai, C. Y. Lin, L. W. Liu, and R. Y. Duan, “Voltage-clamped forward quasi-resonant converter with soft switching and reduced switch stress,” IEEE Proc. on EPA, vol. 152, pp. 558-564, May 2005.
[25] W. A. Tabisz and F. C. Lee, “Zero-voltage-switching multi-resonant technique-a novel approach to improve performance of high frequency quasi-resonant converters,” IEEE Proc. on PESC, pp. 9-17, 1988.
[26] W. Tang, C. S. Leu and F. C. Lee, “Charge control for zero-voltage-switching multi-resonant converter,” IEEE PESC, pp. 229-233, 1993.
[27] F. S. Tsai and F. C. Lee, “A complete DC characterization of a constant-frequency, clamped-mode, series-resonant inverter for induction heating,” IEEE PESC, vol. 1, 18-22, pp. 450-456, 1995.
[28] M. M. Jovanovic, W. A. Tabisz and F. C. Lee, “Zero-voltage-switching technique in high-frequency off-line converters, ” IEEE APEC, pp. 23-32, 1988.
[29] M. H. Rashid, Power electronics: circuits, devices, and applications, Prentice-Hall International, Inc., 1993.
[30] Yu. V. Panov and F. C. Lee, “A novel control evaluation technique for resonant converters, ” IEEE PESC, vol. 1, pp. 301-308, 1994.
[31] G. C. Hsieh, J. C. Li, and R. S. Yeh, “An Equivalently Derived Circuit Model for Zero-current-switched forward resonant converters,” IEEE Proc. on IECON, vol. 1, pp. 231-236, November 1991.
[32] D. Medini and S. Ben-Yaakov, “A current-controlled variable-inductor for high frequency resonantpower circuits,” IEEE APEC, vol. 1, pp. 219-225, 1994.
[33] J.-U. W. Hsu, A. P. Hu, A. Swain, Xin Dai and Yue Sun, “A new contactiess power pick-up with continuous variable inductor control using magnetic amplifier,” IEEE Proc. on Powercon, pp. 1-8, 2006.
[34] M. S. Perdigao, J. M. Alonso, M. A. Dalla Costa and E. S. Saraiva, “A variable inductor MATLAB/Simulink behavioral model for application in magnetically controlled electronic ballasts,” Power Electronics, Electrical Drives, Automation and Motion, pp.349-354, June, 1994.
[35] J. M. Alonso, M. A. Dalla Costa, M. Rico-Secades, J. Cardesin and J. Garcia, “Investigation of a New Control Strategy for Electronic Ballasts Based on Variable Inductor, ” IEEE Trans. on Power Electronics, vol. 55, issue 1, pp. 3-10, January 2008.
[36] 洪雅勗，“零電流切換雙開關順向式轉換器之研製”，國立成功大學電機工程學系碩士論文，民國九十七年六月。
[37] ICE2PCS02 Datasheet, Infineon Instrument, 2007.
[38] UC3866 Datasheet, Texas Instrument, 2007.