本文旨在提出一個具不斷電功能之個人電腦用電源供應器架構，其主要由順向式電源轉換電路與降壓型充電器電路所組成。相較於傳統UPS，架構上由於僅透過一個直流對直流轉換層級，所以整體轉換效率能夠有效提升，電路成本及體積亦同時降低。電源供應器前級能夠同時接受高壓端市電與低壓端蓄電池輸入，並採用脈寬調變的方式控制整體電路與模式的切換，而不需外加偵測電路即可提供負載無轉換時間之不斷電功能。同時電路於市電、蓄電池輸入以及電源輸出間亦有完整的隔離。最後並以此架構完成整體實驗電路與模擬以驗證電路之可行性。

　　This thesis presents a PC switch-mode power supply (SMPS) with uninterruptible feature, which consists of a forward converter and a buck battery charger. High efficiency can be obtained due to the use of a single DC-DC conversion topology from input to output over the conventional UPS. Besides, the cost and circuit size will also be reduced. This power supply can accept a high voltage of main power input and a low voltage of backup battery input simultaneously, and uses PWM control method for the normal and backup modes of operation, so that it dose not require any detection circuit for power failure and provides a zero switch-over time function. The circuit also provides fully isolation among inputs and outputs. Finally, the experimental prototype has been simulated and built to verify the feasibility of this circuit.

[1] D. C. Griffith, Uninterruptible Power Supplies: power conditioners for critical equipment, New York: Marcel Dekker, 1989.

[2] K. W. Ma and Y. S. Lee, “A Novel Uninterruptible DC-DC Converter for UPS Applications,” IEEE Trans. Ind. Applicat., Vol. 28, no. 4, pp. 808-815, 1991.

[3] X. M. Yuan and W. X. Lin, “Integrated Uninterruptible DC Converter with Low Input Distortion and Wide Regulation Capability,” in Proc. IEEE Power Electronics and Variable-Speed Drives Conf., 1994, pp. 638-644.

[4] K. W. Ma and Y. S. Lee, “An Integrated Flyback Converter for DC Uninterruptible Power Supply,” IEEE Trans. Power Electron., Vol. 11, pp. 318-327, 1996.

[5] D. K. W. Cheng and W. Chan, “Design of A Switching Mode Power Supply with UPS Features,” in Proc. IEEE Power Electronics and Drive Systems Conf., Vol. 1, 1995, pp. 341-346.

[6] E. Rodriguez, H. Visairo, and J. Arau, “A High Efficiency DC-UPS with PFC,” in Proc. IEEE Power Electronics Specialists Conf., Vol. 3, 2000, pp. 1439-1444.

[7] A. Fernandez, J. Sebastian, J. A. Martin-Ramos, J. Corral, and F. Ruiz, “Multiple Output AC/DC Converter with An Internal DC UPS,” in Proc. IEEE Power Electronics Specialists Conf., Vol. 3, 2002, pp. 1095-1100.

[8] D. K. W. Cheng and F. H. Leung, “Design of A Switching Mode Power Supply with UPS Features,” in Proc. IEEE Microelectronics and VLSI Conf., 1995, pp. 444-447.

[9] 杜光宗，不斷電電源裝置，建宏出版社，pp.6-12，1992。

[10] 謝勝仁，“UPS共同技術篇”，電子技術，第89期，pp. 13-16，1993。

[11] F. Kamran and T. G. Habetler, “A Novel On-line UPS with Universal Filtering Capabilities,“ IEEE Trans. Power Electron., Vol. 13 3, pp. 410 -418.

[12] W. J. Ho, J. B. Lio, and W. S. Feng, “A Line-Interactive UPS Structure with Built-in Vector-controlled Charger and PFC,” IEEE Trans. Power Electron., Vol. 1, pp. 127-132, 1997.

[13] 梁適安，高頻切換式電源供應器與設計，全華科技圖書股份有限公司，pp. 3-9，1995。

[14] 陳連春，交換式電源技術手冊，建興出版社，pp. 1-22，1993。

[15] D. Czarkowski and M. K. Kazimierczuk, “Circuit Models of PWM DC-DC Converters,” in Proc. IEEE Aerospace and Electronics Conf., Vol. 1, 1992, pp. 407-413.

[16] Y. T. Chen, D. Y. Chen, and Y. P. Wu, “Control-Loop Modeling of Multiple-Output Feedback of Forward Converters,” IEEE Trans. Power Electron., Vol. 8, pp. 320-328, 1993.

[17] V. Vorperian, “Simplified Analysis of PWM Converters Using the PWM Switch, Part I: Continuous conduction mode,” IEEE Trans. Aerospace and Electronic System, Vol. 26, pp. 497-505, 1990.

[18] A. I. Pressman, Switching Power Supply Design, McGraw-Hill Inc., 1999.

[19] D. W. Hart, Introduction to Power Electronics, Prentice Hall Inc., 1997.

[20] 張西川，電子電路零組件應用手冊，全華科技圖書股份有限公司，2000。

[21] 謝沐田，高低頻變壓器設計，全華科技圖書股份有限公司，1994。

[22] N. Mohan, T. M. Undeland, and W. P. Robbins, Power Electronics, New York: Wiley, 1995.

[23] D. Maksimovic and S. Cuk, “Switching Converters with Wide DC Conversion Range,” IEEE Trans. Vol. 6, pp. 151-157, 1991.

[24] 葉瑞鑫，開關式直流對直流電源轉換器應用，全華科技圖書股份有限公司，2001。

[25] 鄭培璿，Is Spice 在電力電子上的應用，全華科技圖書股份有限公司，2000。

[26] 林志一，曾龍圖，Is Spice Version 8 交談式電路模擬分析與應用，2000。

[27] ATX specifications, Version 2.01.