臺灣博碩士論文加值系統

本論文提出具回授控制之電壓轉換電路，以得到穩定輸出的降壓型與昇壓型轉換器之研究。在PWM控制電路部分，我們以TL494做脈波寬度調整來決定工作週期，回授架構則使用TL494的誤差放大電路進行設計，將回授訊號提供至PWM控制電路，以達到穩定輸出之目標。本研究所提出的電路設計，經由電源調節率(Line regulation)與負載變動率(Load regulation)實驗，證實能夠達到電壓輸出的穩定性。

This paper propose a voltage conversion circuit with feedback control to achieve the buck and boost converters' output stability. In the PWM control circuit, we use TL494 to determine the duty cycle with pulse width modulation(PWM), and design feedback architecture with optical coupler, the feedback signal is supplied to the PWM control circuit, in order to achieve the goal of a stable output. Circuit design proposed in this study, through the experiment of line regulation and load regulation is proved to achieve stable voltage output.

謝誌辭 ...................................... I
摘要… ....................................... II
Abstract ................................... III
目錄… ....................................... IV
圖目錄 ....................................... VI
表目錄 ....................................... VIII
第一章 緒論
1.1 研究背景 ................................. 1
1.2 研究動機與目的 ............................ 1
1.3 文獻探討 ................................. 2
1.4 章節組織 ................................. 5
第二章 電路原理
2.1 電路原理 ................................. 6
2.2 PWM設計 ................................. 7
第三章 降壓電路架構與實驗設計
3.1 降壓型轉換器架構 .......................... 9
3.2 降壓電路設計規格參數 ....................... 10
3.3 驅動電路設計 ............................. 21
第四章 昇壓電路架構與實驗設計
4.1 昇壓型轉換器架構 .......................... 24
4.2 昇壓電路設計規格參數 ....................... 25
第五章 實驗結果與討論
5.1 電源調節率實驗 ............................ 37
5.2 負載變動率實驗 ............................ 38
5.3 驅動電路實驗 .............................. 38
第六章 結論與未來展望
6.1 結論..................................... 39
6.2 未來展望 ................................. 40
參考文獻 ..................................... 41

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