臺灣博碩士論文加值系統

　　隨著電源轉換越來越廣泛，用戶對電源效率、體積、可靠度，提出更高要求，採用傳統順向式二極體整流架構轉換器，很難滿足需求。
　　本論文採用主動箝位架構加入輔助開關與箝位電容能有效抑制電壓突波，降低開關切換損失，並且提高轉換效率，功率元件也可操作更寬輸入電壓範圍，實作以寬度脈波調變控制器，設計順向式轉換器對效率改善之研究。從實驗結果顯示本研究所提出之法確實已達到效率改善之效果。

　　As the power transfer becomes more and more widely applied, the customers’ demands for the power efficiency, size and reliability becomes higher accordingly; however, the conventional forward diode rectifying converter can hardly meet the demands.
　　This paper adopts the active clamp structure to combine with auxiliary switches and clamper capacitance, which can effectively restrain the voltage transient and minimize the damages caused by switch changeover, as well as improve the converting efficiency. The capacity elements can operate a wider range of input voltage. In practice, the Pulse Width Modulation controller is used for the research on efficiency improvement of forward converter. From the experimental results, the methods proposed in the study have realized the improvement results.

目錄
摘要 i
Abstract ii
謝誌辭 iii
目錄 iv
圖目錄 vii
表目錄 ix
第一章 緒論 1
1.1 研究背景 1
1.2 研究動機 3
1.3 研究目的 3
1.4 論文組織 9
第二章 隔離型順向式轉換器原理 10
2.1隔離型順向式轉換器簡介 10
2.2 工作原理分析 11
2.3 主動箝位隔離型順向式轉換器工作原理分析 13
2.4 轉換器損耗來源 15
第三章 轉換器電路的設計與實驗 17
3.1 轉換器方塊圖 17
3.2 降壓電路 18
3.3 脈波寬度調變 19
3.4 驅動電路 21
3.5 功率晶體開關挑選之要點 22
3.6 變壓器設計 22
3.7 儲能電感設計 24
3.8 穩壓電路設計 26
3.9 欠壓保護線路 27
3.10 電路穩定度測試 28
3.11 主動箝位順向式轉換器 30
第四章 實驗結果與討論 34
4.1 實驗參數設定 34
第五章 結論與未來展望 38
5.1 結論 38
5.2 未來展望 38
參考文獻 39
附錄一 41
附錄二 42
附錄三 44
附錄四 45

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