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研究生:李昭翰
研究生(外文):Lee, Chao-Han
論文名稱:無變壓器型之四倍壓直流轉換器建模與分析
論文名稱(外文):Modeling and Analysis of a Novel Transformerless Voltage Quadrupler DC Converter
指導教授:潘晴財
指導教授(外文):Pan, Ching-Tsai
口試委員:林昇甫江茂欽陳政裕鄒應嶼
口試日期:2011-7-22
學位類別:碩士
校院名稱:國立清華大學
系所名稱:電機工程學系
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:2011
畢業學年度:99
語文別:中文
中文關鍵詞:二倍壓轉換器高升壓比無變壓器型四倍壓轉換器低開關跨壓
外文關鍵詞:Voltage DoublerHigh Step-Up Ratio,TransformerlessVoltage QuadruplerLow Switch Voltage Stress
相關次數:
  • 被引用被引用:3
  • 點閱點閱:331
  • 評分評分:
  • 下載下載:26
  • 收藏至我的研究室書目清單書目收藏:0
高壓直流轉換器現今已廣泛使用於許多高壓應用場合,然而現有二倍壓轉換器受限於升壓比不足,較不適用於需更高電壓輸出之應用。若採用多級串接之方式以提高電壓增益比,但如此將使其整體轉換效率低落且增加電路複雜度。基於上述理由,本論文之主要目的即為提出一新型高效率四倍壓直流轉換器。
本論文的主要貢獻有三點。首先,本文提出一單級新型無變壓器型四倍壓直流轉換器,該新型轉換器具有高升壓比、低開關跨壓與高效率等特點。此外,該新型轉換器不需添加額外控制電路,即具有自動均流之優點。第二點貢獻則是針對新型轉換器直流電路特性進行分析,且進一步推導出小訊號數學模型。第三點貢獻則依據理論分析的結果,實際製作一輸入電壓25V、輸出電壓400V以及輸出功率400W之雛型系統以驗證新型轉換器的可行性。經由電路模擬與實測結果顯示本論文所研製之新型轉換器,其主動開關與二極體跨壓分別為輸出電壓的四分之一與二分之一,其電源轉換效率於120W至400W的負載情況下均為93%以上,負載在120W時效率最高可達到95%,以此驗證該新型轉換器之可行性與優越性。最後,本文亦提出一具隔離特性之四倍壓轉換器。

High voltage DC converters are widely used in various applications to provide a high output DC voltage. However, the existing voltage doubler is not sufficient for some much higher voltage applications. Although, one can cascade more stages to achieve the desired voltage level, however, the resulting complex topology will result in less efficiency and reliability. Hence, the major motivation of this thesis is to propose a high efficiency voltage quadrupler DC converter.
In fact, the major contributions of this thesis may be summarized as follows. First, a single stage transformerless voltage quadrupler DC converter is proposed for achieving much higher voltage gain, less voltage stress of switches and higher efficiency. In addition, the proposed converter possesses automatic current sharing capability without adding any extra component. Second, mathematical model of the proposed converter is derived and fundamental characteristics of the new converter are analyzed. Third, a 400W rating prototype with 25V input and 400V output is constructed for verifying the feasibility of the prototype converter. It is seen that the voltage stress of the active switches and the diodes are equal to quarter and half of the output voltage respectively. The resulting efficiency can be maintained above 93% as the load is varied from 120W to 400W, and the highest efficiency of 95% is achieved at 120W. Both simulation and experimental results indeed verify the effectiveness of the proposed converter. Finally, the extended isolated version of proposed quadrupler converter is also presented in this thesis.

摘 要 I
英文摘要 II
誌 謝 III
目 錄 IV
圖 目 錄 V
表 目 錄 VII
第一章 緒 論 1
1.1 研究動機 1
1.2 文獻回顧 2
1.3 本論文之貢獻 3
1.4 論文內容概述 3
第二章 無變壓器型高升壓比直流轉換器簡介 5
2.1 前言 5
2.2 二倍壓轉換器簡介 5
2.3 高升壓增益轉換器簡介 9
2.4 超高升壓比轉換器簡介 12
第三章 本文所提四倍壓直流轉換器之建模與分析 18
3.1 前言 18
3.2 新型轉換器架構與工作原理 18
3.3 新型轉換器之數學模型推導 26
3.4 新型轉換器穩態特性分析 58
第四章 實體電路製作與量測結果 62
4.1 前言 62
4.2 功率電路製作 63
4.3 控制電路實現 64
4.4 模擬與實測結果 71
第五章 結 論 81
5.1 論文內容總結 81
5.2 擴充至極高升壓比轉換器 82
5.3 未來工作 83
參考文獻 85

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