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研究生:莊志成
研究生(外文):Chuang Chei Cheng
論文名稱:模組化全橋相移式零電壓轉換系統之研製
論文名稱(外文):The Realization Study of Modular Phase-Shifted Zero-Voltage-Switching Full-Bridge Converter
指導教授:謝冠群
指導教授(外文):G. C. Hsieh
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:電子工程系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:1999
畢業學年度:87
語文別:中文
論文頁數:96
中文關鍵詞:相移式零電壓切換脈波寬調變功率因數修正器
外文關鍵詞:PS-ZVS-PWMPower factor correctionPFC
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摘 要
本文提出一種適用於電信系統用之高效率高功率密度模組化電源系統的研製,其中轉換器採用相移式全橋(Phase-shifted full-bridge)轉換架構並以零電壓切換脈波寬調變(ZVS-PWM)技術達成高效率高功率密度的目的。控制採行電壓回授方法以獲得良好的電壓調節。轉換器前端使用主動功率因數修正器(Power factor correction,PFC)以獲得良好之輸入功率因數。本轉換器以主僕式電流法的分流技術達成以利模組化並聯之應用。文中並精確推估全橋架構的有效工作週期及其他的副工作週期區間,此外並推導出每個轉換區間的相移過程及其相對應的初級側電流並將電路模型化,最後針對主、僕轉換器完整的小信號流程圖及其中的各個轉移函數亦作詳細的推理與分析。本文提出一設計實例以模擬和實作完成一電源供應器內含4+1模組輸出為24~30V/ 125A (單一模組輸出為24~30V/25A)之相移式零電壓切換脈波寬調變(PS-ZVS-PWM)全橋轉換器以驗證理論的估測。
Abstract
This thesis presents a strategy for realizing a medium-power module AC/DC converter by zero-voltage-switching pulse-width modulation (ZVS-PWM) technique. A full-bridge topology is employed and a voltage-mode control is adopted to acquire good voltage regulation. The valid duty and the sub-duty intervals in the full-bridge loop are exactly estimated. The complete primary current profile with respect to each transition interval of the phase-shift process is derived and modeled. A master-slave active current sharing technique is used as the modulus parallel strategy in the design. A complete small-signal flow chart and inner transfer function of the master and slave module converter is derived. A design example for simulating and realizing a power supply with 4+1 modules of total power 3.75kW (single module’s output is 24V~30V/25A) FB-PS-ZVS-PWM converter including output voltage adjustment and parallel load current sharing is conducted to assess the system performance and to verify the theoretical predictions.
目 錄
頁次
中文摘要i
英文摘要ii
目錄iii
第一章、 緒論1
1.1 研究動機及目的1
1.2 內容大綱2
第二章、 模組化轉換器系統簡介3
2.1 系統架構3
2.2 轉換器模組架構4
第三章、 全橋相移式零電壓轉換器原理9
3.1 主電路簡介9
3.2 轉換區間狀態說明10
3.3 臨界電流與最高切換頻率14
3.4 開關控制信號的產生器21
第四章、 系統並聯原理及方法24
4.1 系統並聯分流技術24
4.2 電壓可調技術28
第五章、 模組化轉換器的分析及補償30
5.1 主電路小信號模型之建立30
5.2 主電路小信號轉移函數34
5.3 工作週期d與有效工作週期deff37
5.4 電壓與分流控制迴路小信號轉移函數40
5.5 模組小信號流程圖建立與分析42
5.6 回授補償技術45
第六章、 設計考量49
6.1 未知規格參數的制訂49
6.2 切換功率晶體的選用49
6.3 主變壓器設計考量50
6.4 諧振電感的設計與選擇53
6.5 輸出整流濾波電路設計53
6.6 直流電流偵測的技術與考量56
6.7 分流的設計58
6.8 單機DC/DC與PFC的同步60
6.9 模組保護電路61
第七章、 實例設計63
7.1 制訂未知規格參數實例63
7.2 功率晶體與切換頻率的選擇實例64
7.3 主變壓器的設計實例64
7.4 諧振電感與死域時間 的設計實例65
7.5 輸出整流濾波電路設計實例65
7.6 分流電路的設計實例65
7.7 補償器的設計實例66
第八章、 模擬71
8.1 主電路動作模擬71
8.2 系統穩定度模擬77
第九章、 實作結果量測與討論82
9.1 諧振電路與開關波形量測82
9.2 轉換器靜態規格量測85
9.3 轉換器暫態響應88
第十章、 結論與建議91
10.1 結論91
10.2 未來研究方向建議92
參考文獻93
附 錄
A. 圖表索引A-1
B. 重要參數符號索引B-1
參考文獻
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[1] 賴日生,高功率電力電子學與應用,第四部份,第1~2頁,民國八十六年八月。
[2] 莊志成、賴裕鴻、謝冠群, 模組化零電壓切換脈波寬調變相移式全橋轉換器的研製,電力電子技術雙月刊,1998年12月。
[3] 謝冠群,轉換器控制技術, 工研院電力電子養成班訓練課程講義。民國八十七年四月。
[4] 梁適安,交換式電源供應器之理論與實務設計,全華圖書出版社,1994年.
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