博碩士論文 etd-1230108-164649 詳細資訊


姓名 陳揚斌 (Yang-Pin Chen) 電子信箱 不公開
學號 M9502C05 論文著作權 作者與指導教授共同擁有
系所名稱(中) 電子工程系 系所名稱(英) Department of Electronic Engineering
學年度 / 學期 97學年度第1學期 學位 碩士 (Master)
論文名稱(中) 高效率LLC同步整流串聯諧振轉換器之研製
論文名稱(英) Study and Implementation of a High-Efficiency LLC Series Resonant Converter with Synchronous Rectification
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論文使用權限 校內 3 年後公開、校外 5 年後公開
論文種類 碩士論文
論文語文別 / 頁數 中文 / 121
統計 已被瀏覽 1749 次,被下載 48 次
關鍵字(中)
  • 同步整流
  • 零電壓切換
  • 串聯諧振轉換器
  • 關鍵字(英)
  • synchronous rectification
  • zero-voltage switching
  • Series resonant converter
  • 摘要(中) 本論文主要研製一高效率LLC同步整流串聯諧振轉換器。此電源供應器全機結構包含前端的電磁干擾濾波器,可有效濾除系統端雜訊所造成的干擾問題,前級使用升壓型主動功率因數修正器,以提升電路操作時的功率因數,減低其電流諧波成分,進而達到良好的電力品質。後級採用LLC串聯諧振轉換器,並藉由提高切換頻率以縮小磁性元件的體積,且利用零電壓切換與同步整流技術,以達到高功率密度及高轉換效率的要求。另外,加入保護電路(OVP、OCP、SCP),以避免電源供應器內部元件在不正常的操作下受到損害。文中除了說明兩個主架構的動作原理外,並詳細說明了設計考量與電路中重要元件值之規格,且搭配Mathcad模擬軟體模擬串聯諧振電路輸出電壓頻率響應圖,了解品質因數Q、K因子與特性阻抗Zo對曲線的影響。最後進行分析找出合適之操作點。
    本文實作出一台AC/DC電源供應器,輸入電壓90 ~264 Vac、輸出電壓DC 12V、輸出滿載電流20A。全機效率在115 Vac交流輸入且滿載下高達90%。在20%、50%、75%、100%四種負載情況之四點平均效率下,交流輸入電壓115Vac可達89.5%,230Vac可達90.7%,證明電路從輕載至滿載皆保持高轉換效率且輸出穩壓率皆小於±1%,最後估計全機功率損耗,並研擬未來研究方向。
    摘要(英) This thesis focuses on the study and implementation of a high-efficiency LLC series resonant converter (SRC) with synchronous rectification. An EMI filter is used to suppress the conducted noise resulted from the switching device and the parasitics. The front-end part of the converter is a boost power factor corrector (PFC) to eliminate the current harmonics and raise the input power factor. The second stage is a high-frequency LLC SRC. In order to further improve the efficiency and increase the power density, zero-voltage switching and synchronous rectification technologies are adopted. The main controller features several protection circuits to protect the power converter. The operations and mathematical analysis for the PFC and LLC SRC are discussed. For the LLC SRC, the relationships among the voltage gain, quality factor (Q), inductor ratio (K) and characteristic impedance (Zo) have been analyzed and simulated with Mathcad.
    Finally, the experimental results from the implemented prototype converter with an ac input voltage of 90 ~ 264 Vac, a dc output voltage of 12 V and the rated output load of 20 A are measured. The overall efficiency is up to 90 % for the full load condition. And the average efficiency is 89.5 % for 20-%、50-%、75-% and 100-% load conditions at the ac input voltage of 115 Vac ,and 90.7 % at 230 Vac.
    論文目次 摘 要 i
    Abstract ii
    誌 謝 iii
    目 錄 iv
    符號索引 vii
    圖索引 xii
    表索引 xvi
    第一章 緒論1
    1.1 研究動機1
    1.2 研究目的2
    第二章 系統簡介與內容大綱 3
    2.1 系統簡介3
    2.2 論文內容大綱6
    第三章 功率因數修正器之架構與原理 7
    3.1 功率因數與總諧波失真之定義 7
    3.2 功率因數修正器之種類11
    3.2.1 被動式功率因數修正器11
    3.2.2 主動式功率因數修正器12
    3.3 升壓型功率因數修正器之電路架構14
    3.4 功率因數修正器之控制方式15
    第四章 串聯諧振式轉換器架構與原理21
    4.1 LC串聯諧振電路簡介[29]21
    4.2 理想RLC串聯諧振電路23
    4.3 零電流切換與零電壓切換[30]25
    4.4 半橋串聯諧振式轉換器26
    4.4.1 SRC諧振模式28
    4.4.2 LLC諧振模式30
    4.4.3 SRC與LLC之比較32
    4.5 LLC串聯諧振轉換器之動作分析 33
    4.6 諧振槽之分析與模擬 40
    4.6.1 品質因數Q值及K因子對頻率響應的影響41
    4.6.2 特性阻抗Zo對頻率響應之影響43
    4.7 LLC輸出同步整流技術44
    4.7.1 同步整流技術之優點 44
    4.7.2 輸出同步整流訊號控制47
    第五章 整機電源轉換器之設計49
    5.1 主動功率因數修正器之電路設計49
    5.1.1 控制IC NCP165449
    5.1.2 主動功率因數修正器電路規格 51
    5.1.3 主動功率因數修正器功率級元件設計52
    5.2 半橋串聯諧振式轉換器電路設計58
    5.2.1 控制IC L659958
    5.2.2 半橋串聯諧振式轉換器電路規格60
    5.2.3 半橋串聯諧振式轉換器功率級元件設計60
    第六章 實驗數據與實驗結果 74
    6.1 整機AC/DC轉換器之規格74
    6.2 PFC之量測波形75
    6.3 LLC串聯諧振式轉換器之量測波形79
    6.4 保護電路之實測波形 85
    6.5 輸出維持時間之量測波形87
    6.6 PFC單級量測數據87
    6.7 LLC串聯諧振式轉換器單級量測數據89
    6.8 全機量測數據89
    6.9 全機功率損失計算90
    6.9.1 主動功率因數修正器損耗分析90
    6.9.2 LLC串聯諧振式轉換器損耗分析93
    6.9.3 輔助電源所需之功率與其他損失97
    6.9.4 全機功率損耗分析97
    6.10 電路實體照片98
    第七章 總結與未來展望99
    7.1 總結99
    7.2 未來研究方向100
    參考文獻 101
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    指導教授/口試委員
  • 邱煌仁 - 指導教授
  • 羅有綱 - 指導教授
  • 劉益華 - 委員
  • 歐勝源 - 委員
  • 繳交日期 2009-01-05


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