Future Research

Based on the proposed circuits, the suggested future researches are to realize the proposed bridge-type converter, to implement soft-switching technique in these new converters and to improve power flow process in one times transformation from input terminal to output port. Although this research proposes the approach to reduce bulk inductance in boost cell of the boost-type input current shaper, the power efficiency is still not to be satisfied because a part of input power is transferred two times before deliver to output.

The part of input power transfers to bulk capacitor via boost cell then the power transfers to output port via dc/dc cell. That is the reason why the power efficiency isn’t satisfied.

The proposed flyback converter and forward converter can employ active-clamp technique to implement soft-switching approach [42]-[46]. Besides, the proposed bridge-type converters can employ phase-shift technique to implement zero-voltage-switching approach [47]-[49].

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Vita

姓名: 劉興富 性別: 男

生日: 中華民國 52 年 7 月 25 日 籍貫: 台灣省新竹縣

論文題目: 中文: 新型式單相單級交流轉直流且具有輸入電流修飾的電源轉換器 英文: Novel Single-Phase Single-Stage AC/DC Converters with Input Current

Shaper

Research Laboratories, Industrial Technology Research Institute, Hsingchu, Taiwan, R.O.C., where his research focused on soft-switching techniques, high-density dc/dc converters, and ac/dc Power-factor-correction circuits. In 1995, he joined Philips Electronics, Chung-Li, Taiwan, R.O.C., as Senior Designer, developing ac/dc and dc/dc power circuits for new model PC monitors. In 1998, he joined Delta Electronics, Chung-Li, Taiwan, R.O.C., where he was involved in developing a switching-mode rectifier for a telecom power system. From 2000 to 2004, he was with Analog Integrations Corporation, Hsingchu, Taiwan, R.O.C., as Manager of the Application Engineering Department. His interests include high-frequency soft-switching techniques, passive and active snubber circuits, ac/dc power-factor-correction circuits, LEDs lighting power, and modeling simulation on power electronics.

Hsing-Fu Liu (M’00) was born in Hsingchu, Taiwan, R.O.C, in 1963. He received the M.S. degree in electrical engineering from Chung Yuan Christian University, Chung-Li, Taiwan, R.O.C., in 1991. He is currently working toward the Ph.D. degree at National Chiao Tung University, Hsingchu, Taiwan, R.O.C. From 1991 to 1995, he was with the Computer and Communications

學歷:

1. 民國 80 年 6 月 私立中原大學電子工程研究所畢業

2. 民國 94 年 6 月 國立交通大學電機及控制工程研究所博士班畢業

經歷:

1. 民國 87 年 7 月 任職台達電子公司研發工程部

2. 民國 89 年 8 月 任職沛亨半導體公司應用工程部經理 3. 民國 93 年 2 月 任職聚積科技公司應用工程部資深經理

4. IEEE member and member of IEEE Power Electronics Society since 2000.

5. IEEE APEC Technical Program Committee Member, 19th International Conference on Feb. 22-26, 2004.

6. IEEE PESC Technical Program Committee Member, 36th International Conference on June 12-16, 2005.

著 作 目 錄

Journal

[1] Hsing-Fu. Liu and Lon-Kou. Chang, “Flexible and Low Cost Design for a Flyback AC/DC Converter With Harmonic Current Correction,” IEEE Trans. Power Electronics, vol. 20, pp. 17~24, Jan 2005.

[2] Lon-Kou. Chang and Hsing-Fu. Liu, “A Novel Forward AC/DC Converter With Input Current Shaping and Fast Output Voltage Regulation Via Reset Winding,” IEEE Trans.

Industrial Electronics, vol. 52, pp. 125-131, Feb. 2005.

Patent

[1] 張隆國, 劉興富, “反馳式電流諧波校正之交流轉直流轉換器”,專利號碼: I221699 中華民國專利. 93 年 10 月.

Conference

[1] Hsing-Fu Liu ,” Constant- Power- Protection in Switching Power Converter with

Variable-Frequency Modulation,” 第21屆電力工程研討會, pp.779-783, 台北市, 台灣, Nov. 18~19, 2000.

[2] Hsing-Fu Liu, Yung-Hiang Liu and Ying-Yu Tzou,” Implementation of ZVT soft switching technique in a single-phase PFC rectifier for server power supply,” in Proc.

PIEMC 2000, pp. 584 – 589,Beijing, China, 15-18. Aug., 2000.

[3] Lon-Kou Chang and Hsing-Fu Liu, “A Flexible and Low Cost Design for Flyback AC/DC Converter with Harmonic Current Correction,” in Proc. APEC’03, pp. 677–683,Miami Beach, Florida, USA, 9-13 Feb., 2003.

[4] Lon-Kou Chang and Hsing-Fu Liu,” A flexible and cost-effective family for AC/DC converters with input-current-shaper and fast output-voltage-regulation,” in Proc.

PESC’04, pp. 3113-3119, Aachen, Germany,20-25 June 2004.

[5] Lon-Kou Chang; Yen-Ming Liu; Hsing-Fu Liu,” An integrated single-stage AC/DC converter with ZVS active-clamping for universal line applications,” in Proc. PESC’04, pp. 759-764, Aachen, Germany,20-25 June 2004.

[6] Lon-Kou Chang and Hsing-Fu Liu,” A novel and low cost design for forward AC/DC converter with harmonic current correction,” in Proc. IPEMC’04, pp. 105-110, Xi’an China, 14-16 Aug., 2004.