本論文提出一具高電壓轉換比與寬電壓範圍之雙向可變結構DC-DC轉換器，所提出之雙向DC-DC轉換器可依據不同電壓等級變換電路結構，並操作於六種不同的電路架構。如將本文提出之電路架構分為A、B兩端，以功率由A端流至B端為降壓模式時，可操作於單一降壓(Single Buck)架構、交錯式降壓(Interleaved Buck)架構及雙降壓(Dual Buck)架構；以功率由B端流至A端為升壓模式時，則可操作於單一升壓(Single Boost)架構、交錯式升壓(Interleaved Boost)架構及雙升壓(Dual Boost)架構。論文中並針對各架構進行損失推導，以確認於不同電壓範圍與不同架構時的最佳效率切換點。因所提出之雙向可變結構DC-DC轉換器具有對稱性，故透過兩組所提之雙向DC-DC轉換器串接，可實現更寬電壓範圍的雙向可升且可降泛用DC-DC轉換器。論文中實作一A端電壓200V，B端電壓25V~150V，B端電流1A~10A之雙向可變結構DC-DC轉換器，及輸入電壓200V，輸出電壓25V~750V之雙向可升且可降泛用DC-DC轉換器。實驗結果針對不同輸出電壓等級於各電路架構下的開關訊號、電感電流及效率進行量測與比較，並驗證雙向可升且可降泛用DC-DC轉換器之可行性。由效率模擬及量測結果可以看出，電路可依輸出電壓與電流需求使轉換器操作在最佳效率。實測結果證實所提之轉換器可藉由變換結構讓電路操作在最佳效率，且轉換器最高轉換效率可達98.81%。

A bi-directional variable-structure DC-DC converter with high voltage conversion ratio and wide voltage range is proposed in this thesis. The proposed bi-directional DC-DC converter can be operated in six different circuit structures according to the input and output voltage levels. The circuit configuration of proposed bi-directional DC-DC converter can be divided into terminals A and B. Defining the power flowing from terminal A to terminal B as buck mode, the proposed converter can be operated in single buck, interleaved buck and dual buck structures. On the contrary, defining the power flowing from terminal B to terminal A as boost mode, the proposed converter can be operated in single boost, interleaved boost and dual boost structures. The loss formulas are also derived to identify the optimal efficiency switching points for different circuit structures at different voltage ranges. Due to the duality of proposed bi-directional DC-DC converter, a universal bi-directional DC-DC converter is also proposed in this thesis by cascading two proposed converters. Wider voltage range and step-up and step-down voltages at terminals A and B can therefore be achieved. A prototype for the proposed bi-directional DC-DC converter with a rated voltage of 200V at terminal A, a rated voltage between 25V and 150V at terminal B and a rated current of between 1A and 10A at terminal B is designed and implemented in this thesis. A prototype with a rated input voltage of 200V and a rated output voltage between 25V and 750V is also implemented for the proposed universal bi-directional DC-DC converter. Experimental results show and compare the waveforms of driving signals of switches and inductor currents and conversion efficiencies under different voltage levels and different circuit structures. The validity of proposed universal bi-directional DC-DC converter is also verified. From the simulation and experimental results of conversion efficiency, the optimal efficiency switching points for different circuit structures under different voltage and current levels can be determined. Experimental results also indicate that a maximum conversion efficiency of 98.81% can be achieved for the proposed bi-directional variable-structure DC-DC converter.

論文審定書+i
誌謝 +ii
摘要+iii
Abstract+iv
目錄+vi
圖目錄+viii
表目錄+xv
第一章 緒論+1
1-1研究背景+1
1-2研究動機+2
1-3論文大綱+3
第二章 相關電路架構介紹+4
2-1單向高降壓比轉換器+4
2-2單向高升壓比轉換器+5
2-3雙向升降壓轉換器+7
第三章 雙向可變結構之DC-DC轉換器介紹+11
3-1 A端至B端操作模式及損失分析+14
3-1-1單一降壓架構之動作模式及損失分析+16
3-1-2交錯式降壓架構之動作模式及損失分析+22
3-1-3雙降壓架構之動作模式及損失分析+30
3-2 B端至A端操作模式及損失分析+39
3-2-1單一升壓架構之動作模式及損失分析+41
3-2-2交錯式升壓架構之動作模式及損失分析+47
3-2-3雙升壓架構之動作模式及損失分析+55
3-3雙向可升且可降之泛用DC-DC轉換器操作模式+63
第四章 電路設計與控制+69
4-1電路元件與參數設計+69
4-1-1電感設計及鐵芯選擇+69
4-2-1開關驅動電路+72
4-2-2取樣電路+73
4-3程式設計流程+75
第五章 電路測試規格與實驗結果+78
5-1雙向可變結構DC-DC轉換器A端至B端各架構實驗波形+80
5-1-1單一降壓架構+80
5-1-2交錯式降壓架構+86
5-1-3雙降壓架構+91
5-2雙向可變結構DC-DC轉換器B端至A端各架構實驗波形+95
5-2-1單一升壓架構+95
5-2-2交錯式升壓架構+101
5-2-3雙升壓架構+106
5-3雙向泛用DC-DC轉換器之實驗波形+110
5-3-1雙降壓架構+110
5-3-2雙升壓架構+112
5-3-3堆疊降升壓架構+114
5-4輸出效率估計及實測比較曲線+116
5-4-1 A端至B端降壓架構之估測及實測曲線+116
5-4-2 B端至A端升壓架構之估測及實測曲線+131
第六章 結論及未來研究方向+146
6-1結論+146
6-2未來研究方向+147
參考文獻+148

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