臺灣博碩士論文加值系統

本文提出一個具有再生箝制功能之高昇壓轉換器。此新型高昇壓轉換器具有高昇壓比、高轉換效率與低開關電壓應力之特性。此高昇壓轉換器之高昇壓比是藉由調整耦合電感的圈數比與倍壓電路來達成。此外，儲存於耦合電感中之漏電感能量，可藉由開關在截止期間予以回收，因此轉換效率得以提升，並且能夠有效地箝制功率開關上的電壓。本論文中亦對此高昇壓轉換器作詳細的穩態電路動作分析，並對於轉換器中之電壓比與邊界工作條件亦作詳細的推導。最後實際設計製作一個輸入為直流12V，輸出為直流200V/140W之高昇壓轉換器的雛型電路，並藉由電腦模擬與實際電路量測之結果，驗證此高昇壓轉換器確實具有高昇壓比、高轉換效率以及低開關電壓應力之特性。

A high step-up converter with regenerative clamping is proposed in this thesis. The proposed high step-up converter presents the characteristics of high step-up ratio, high efficiency and low voltage stress on power switch. The high step-up ratio is achieved by adjusting the turn ratio of coupled inductor and voltage doubler. Moreover, the energy stored in coupled inductor can be recycled during switching off period that the conversion efficiency is enhanced as well as the power switch is effectively clamped. The steady-state operation principle of the proposed high step-up converter is analyzed in detail in this thesis. Also, the voltage ratio and the boundary condition of the proposed converter are derived. Finally, a prototype of the proposed high step-up converter, with DC input 12V and DC output 200V/140W, is implemented and simulated to demonstrate the performances and feasibility. The results prove that the high step-up converter indeed presents the characteristics of high step-up ratio, high conversion efficiency, and low voltage stress on power switch.

目錄
致謝 II
摘要 III
表目錄 X
第一章 緒論 1
1.1動機與文獻探討 1
1.2研究綱要 4
第二章 高昇壓電路架構的介紹 6
2.1昇壓轉換器 6
2.2耦合電感昇壓轉換器 10
2.3具電壓箝制耦合電感昇壓轉換器 13
2.4昇壓-返馳式轉換器 18
2.5應用耦合電感與開關電容之高昇壓轉換器 23
第三章 具再生箝制之高昇壓轉換器 28
3.1具再生箝制之高昇壓轉換器介紹 28
3.2連續導通模式電路動作分析原理 29
3.3耦合電感的設計 38
3.4電壓箝制與漏電感能量回收 41
3.5功率開關的選用 41
3.6功率二極體的選用 42
3.7輸出電容的選用 43
第四章 模擬與實測結果分析 44
4.1 電路規格 44
4.2 耦合電感的設計 44
4.3功率元件選用 47
4.4 PWM IC TL494簡介 49
4.5模擬與實驗結果討論 52
4.5效率分析 62
第五章 結論與未來研究方向 64
5.1結論 64
5.2未來展望 65
參考文獻 66

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