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| 研究生： |
李坤源 Kun-Yuan Li |
|---|---|
| 論文名稱： |
寬輸入電壓範圍之高效率半橋串聯諧振轉換器研製 Study and Implementation of a High-Efficiency Half-Bridge Series Resonant Converter with Wide Input Voltage Range |
| 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： | 94 |
| 中文關鍵詞： | 主動式功率因數修正器 、半橋式串聯諧振轉換器 、零電壓切換 、同步整流技術 、功率因數修正器關閉機制 |
| 外文關鍵詞： | active power factor correction, half-bridge series resonant converter, zero voltage switching, synchronous rectification, power factor correction turn off |
| 相關次數： | 點閱：1289 下載：36 |
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基於綠色環保、節能減碳之政策與時勢潮流，本論文主要研製一台240W寬輸入電壓範圍之半橋串聯諧振轉換器，目的在於不影響重載效率的前提下，提升高壓輸入時之輕載效率。電源轉換器前級為主動式功率因數修正器，用以提升電源轉換器之功率因數；後級為半橋式串聯諧振轉換器，使用零電壓切換(Zero Voltage Switching、ZVS)以及同步整流(Synchronous Rectification、SR)技術實現高效率電源轉換器。
本論文詳細探討電路動作原理與設計準則，最後實作完成一輸入電壓AC 115 V ~ 230 V、輸出電壓 12 V、滿載輸出電流 20 A、功率開關切換頻率範圍為45 kHz ~ 90 kHz、輸入電壓 AC 115 V下滿載(240 W)效率達90%、輸入電壓 AC 230 V下輕載(48 W)效率達92%之電源轉換器。
Based on the trend and policy of energy saving, a 240-W half-bridge (HB) series resonant converter (SRC) with wide input voltage range is presented in this thesis. The aim is to raise the light-load efficiency at high line input without affecting the heavy-load efficiency. The front-stage circuit of the implemented AC-to-DC converter is a power factor corrector (PFC) to improve the input power factor (PF) and current harmonics. The post-stage circuit is the discussed HB SRC adopting the zero-voltage-switching (ZVS) and synchronous rectification (SR) techniques to achieve high conversion efficiency. The output voltage of the presented tracking boost PFC is varied with the input AC voltage to raise the heavy-load efficiency of the post-stage HB SRC. Also the PFC is turned off below some specified load level at high line input to improve the light-load efficiency.
Detailed circuit operations and design considerations are given in this thesis. A 240-W prototype converter with universal input AC voltage (115 V ~ 230 V) is built to conduct the experiments. The regulated output voltage is 12 V and nominal load current is 20 A. The switching frequency is from 45 kHz to 90 kHz. Experimental results show that the overall conversion efficiency at full load (240 W) and at low line input (115 V) is 90 %, while a 92-% efficiency is measured at light load (48 W) and at high line input (230 V).
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