臺灣博碩士論文加值系統

本論文主要的目的係在研製一具雙電源模組並聯之DC-DC 降壓型轉換器，
並加入所提之電流分配技術，以調控兩模組之輸出電流，使其輸出功率僅可能地
平均分配於各電源模組，用以改善只由單一模組供電之效率問題。於本論文中，
雙電源模組並聯型DC-DC 轉換器之規格為輸入電壓12V，輸出電壓5V，滿載輸
出電流20A。藉由理論推導、模擬及實作以驗證所提架構之可行性。

The main purpose of this thesis is to develop a DC-DC converter with two power
modules in parallel. With the proposed current-sharing strategy, the output current of
this converter can be distributed between two power modules as evenly as possible, so
as to enhance the efficiency as compared with the converter with a single module. In
this paper, the specifications for the proposed DC-DC converter with two power
modules in parallel are the input voltage of 12V, the output voltage of 5V and the
rated output current of 20A. The effectiveness of the proposed current-sharing scheme
is verified by means of theoretical derivation, simulation and experimental results.

中文摘要………..……………………………………………………………………...i
英文摘要……………………………………………………………………………...ii
誌謝…………………………………………………………………………………..iii
目錄…………………………………………………………………………………..iv
表目錄………………………………………………………………………………vi
圖目錄………………………………………………………………………………..vii
符號對照表…………………………………………………………………………..xi
縮寫名詞對照表…………………………………………………………………….xiv
第一章 緒論…………………………………………………………………………..1
1.1 研究背景與目的………………………………………………………….1
1.2 研究方法………………………………………………………………….7
1.3 內容大綱………………………………………………………………….8
第二章 DC-DC 降壓型轉換器介紹………………………………………………….9
2.1 單級降壓型DC-DC 轉換器介紹…………………………………….9
2.2 多級並聯型DC-DC 轉換器介紹……………………………………...18
2.3 無均流匯流排之均流控制技術原理與介紹………………………...20
第三章 硬體架構之設計……………………………………………………………22
3.1 系統規格………………………………………………………………...22
3.2 系統架構………………………………………………………………...23
3.3 單模組之研製………………………………………………………….25
3.3.1 輸入電容濾波器設計……………………………………………25
3.3.2 輸出電感設計…………………………………………………....26
3.3.3 輸出電容設計…………………………………………………....29
3.3.4 功率開關選擇與設計…………………………………………....30
3.3.5 均流控制電路設計……………………………………………....30
3.3.6 鋸齒波產生電路設計………………………………………..…..34
3.3.7 軟啟動電路設計………………………………………………....35
3.3.8 低電壓鎖定及過電流保護電路設計…………………………..36
3.3.9 同步整流控制器介紹………………………………………..…..37
3.3.10 Oring 控制器介紹………………………………………..……38
第四章 具均流控制之模組並聯型轉換器分析……………………………….…39
4.1 單級降壓型DC-DC 轉換器小訊號模型推導…………………..…..39
4.2 本文所提架構之系統迴路增益推導…………………………..…….46
4.3 所提架構之控制器設計………………………………………….…..58
第五章 系統電路模擬………………………………………………………………63
5.1 未使用均流控制之模擬結果………….………………………………63
5.2 使用均流控制之模擬結果……………………….……………………64
第六章 實驗結果與討論……………………………………………………………77
6.1 使用均流控制之穩態波型量測……………………………………….77
6.2 使用均流控制之暫態波型量測……………………………………….85
第七章 結論與未來發展方向………………………………………………………93
7.1 結論…………………………………………………………………….93
7.2 未來發展方向………………………………………………………….93
參考文獻……………………………………………………………………………..94

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