研究生: |
洪振傑 Chen-chieh Hung |
---|---|
論文名稱: |
高效能500W個人電腦電源供應器之研製 Study and Implementation of a 500W High-Performance PC Power Supply |
指導教授: |
羅有綱
Yu-Kang Lo 邱煌仁 Huang-Jen Chiu |
口試委員: |
劉益華
Yi-Hua Liu |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2009 |
畢業學年度: | 97 |
語文別: | 中文 |
論文頁數: | 134 |
中文關鍵詞: | 交錯式邊界電流模式功率因數修正電路 、半橋串聯諧振轉換器 、同步整流 、同步降壓型轉換器 、返馳式轉換器 、待機電源 |
外文關鍵詞: | Interleaved Boundary Current Mode PFC, Half-bridge Series Resonant Converter, Synchronous Rectification, Synchronous Buck, Flyback Converter, Standby Power |
相關次數: | 點閱:382 下載:15 |
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本篇論文主要研製一符合能源之星規範的500瓦個人電腦電源供應器,輸出規格如下:12V/28 A、5V/18 A、3.3V/18A、-12V/1A與一組待機電源5V/2A。雙相交錯式邊界電流模式功率因數修正電路為前置穩壓器,以提高轉換效率與功率因數,並減少輸入電流的總諧波失真率。DC-DC轉換器架構選用半橋式串聯諧振轉換器提供12V輸出,其與生俱來的零電壓切換特性減少變壓器一次側切換損耗,同步整流技術減少二次側導通損。兩組同步降壓型轉換器5V與3.3V輸出。所研製之電源供應器具有個人電腦電源監控機制,以提高電源模組之可靠度。並設計一返馳式轉換器架構,提供待機與輔助電源。
雛型電路的實驗測量結果,驗證了本論文所研究的電源系統的可行性,且在轉換效率與功率因數符合皆能源之星要求的規範。
In this thesis, a 500-watt power supply for personal computer is developed for satisfying the Energy Star requirements. The output specifications of the developed power supply are: 12V/28 A, 5V/18 A, 3.3V/18A, -12V/1A with an additional 5V/2A standby power supply. An interleaved two-phase boundary current mode power factor correction (BCM PFC) circuit is adopted as the pre-regulator to enhance the conversion efficiency, raise input power factor and reduce input current harmonics. The DC-DC converter is implemented by using a half-bridge series resonant converter (SRC) topology to provide 12V output. The inherent zero-voltage switching feature reduces the switching loss of primary power switches. Synchronous rectification (SR) technology is used to eliminate the secondary conduction losses. Two synchronous buck converter supply 5V and 3.3V outputs. The developed power control mechanism enhances the reliability of the implemented power supply modules. A Flyback converter is designed to provide standby and auxiliary powers. Experimental results of a prototype circuit are shown to verify the feasibility of the studied power supply system. Both the conversion efficiency and power factor meet the requirements of Energy Star specifications.
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