高功率隔離式全橋直╱直流轉換器｜國立清華大學博碩士論文庫

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研究生：	關曄 Yeh Guan
論文名稱：	高功率隔離式全橋直╱直流轉換器 High Power Isolated Full- Bridge DC-DC Converter
指導教授：	鄭博泰 Po-Tai Cheng
口試委員:
學位類別：	碩士 Master
系所名稱：	電機資訊學院 - 電機工程學系 Department of Electrical Engineering
論文出版年：	2005
畢業學年度：	93
語文別：	英文
論文頁數：	72
中文關鍵詞：	全橋式、轉換器、軟式切換、同軸、隔離、高功率、直流、變壓器
外文關鍵詞：	Full bridge, Converter, Soft Switching, Coaxial, Isolated, High Power, DC, Transformer
相關次數：	點閱：107 下載：0
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近幾年來，全橋式的轉換器被廣泛地應用在許多方面。隨著系統額定的不斷增加，以軟式切換來降低切換損失、提高能量轉換效率的技巧越來越受到重視。在本篇論文中，主要是以損失限制式的全橋轉換器作為基礎，並以同軸變壓器的概念來建構系統所需的隔離變壓器，以期將變壓器漏感的效應降到最低。
在本論文中使用了SYNOPSYS Saber Designer這套模擬軟體來進行電路基本運作的模擬。整個電路以近似的模型建立在模擬環境中，以此來進行電路基本操作的模擬。在本篇論文中實際製作了兩種不同架構的多圈同軸變壓器，其中一種為分割式外側繞組架構；將同軸變壓器原本的外側銅管分割為個別單一線圈，彼此串連形成多圈數繞組，並以電木製成之絕緣支撐架構維持同軸幾何位置。另一種為堆疊式的外側銅管繞組；外側銅管繞組彼此堆疊串連形成多圈數架構，內側繞組置於各銅管中行成同軸架構。
在磁性元件分析的方面使用了ANSOFT Maxwell 2D Field Simulator這套程式來進行變壓器磁化特性的分析與漏感理論值的估測。在本篇論文的最後並將兩種實際製作出來的變壓器分別進行參數、磁化特性曲線、以及在實際電路上運作的量測，並將實際量測取得的數據與理論值及模擬的資料進行進一步的比較與驗證。

The full-bridge converters has been found widely use in many applications. With the increment of system power ratings, the soft-switching technique has become much more emphasized. The loss limited full bridge converter has been chosen for the system in this thesis, and the concept of multi-turn coaxial winding transformer is adapted to the system isolation transformer. Two different multi-turn coaxial winding transformer designs is analyzed and fabricated.
Several simulations have been made to verify the system. The SYNOPSYS Saber Designer is used to simulate the primary switching waveforms of the full-bridge zero-voltage-switching circuit. Simulation results by using the ANSOFT Maxwell 2D Field Simulator is also provided to verify the multi-turn coaxial transformer design. An elementary test has been made to verify the basic operation of the proposed system. The fabricated multi-turn coaxial winding transformer has been implemented into the system and was tested. The experiment data is compared with the theoretical ones to verify the designs.

誌謝.....................................................I
中文摘要.................................................II
Abstract.................................................III
List of Contents.........................................IV
List of Figures..........................................VI
List of Tables...........................................IX
Chapter    1.Introduction..................................1
Chapter    2.Literature Review.............................5
    2.1Topology Survey..............................5
    2.2Transformer Design...........................7
    2.3Summary......................................9
Chapter    3.Principles of Design and Operation............10
    3.1Operational Principle........................12
    3.2System Modeling..............................14
        3.2.1Review of the buck converter
                       small-signal model................14
        3.2.2Small signal analysis of
                       the phase-shifted PWM
                       converter.........................17
    3.3Multi-turn Coaxial-winding Transformer
            Design.......................................22
        3.3.1Multi-turn Coaxial-winding
                       Transformer with split
                       outer winding.....................23
        3.3.2Multi-turn Coaxial-winding
                       Transformer with stacked
                       outer winding tubes...............26
    3.4Summary......................................30
Chapter    4.Simulation Verification.......................31
    4.1Switch-by-switch simulation..................31
    4.2Magnetic analysis............................34
    4.3Summary......................................41
Chapter    5.Experimental Results..........................42
    5.1Transformer OCT/CCT..........................42
    5.2Magnetizing Characteristics Test.............45
    5.3Loss Limited Full-bridge Converter Circuit
            Test.........................................52
    5.4Summary......................................60
Chapter    6.Discussion and Conclusion.....................62
Reference................................................64
Appendix A...............................................68
    A1.POWEREX CM200DY-24H..........................68
    A2.IXYS VBE 26-12NO7............................69
    A3.FERROXCUBS TX51/32/19........................70
    A4.FERROXCUBS E80/38/20.........................71
    A5.3C90.........................................72

                                

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