臺灣博碩士論文加值系統

本文的主要目的是研製一種具零電壓切換（Zero Voltage Switching, ZVS）的非對稱脈寬調變（APWM）高頻雙主動橋式（Dual Active Bridge, DAB）轉換器。在傳統的相移調變（Phase Shift Modulation, PSM）DAB轉換器中，循環電流會隨著負載減少而增加，進而影響轉換器效率。循環電流不參與主動能量的傳遞，類似於交流系統中的無功功率。它會增加轉換器的導通損耗和磁性損耗，而APWM能夠在確保ZVS和零電流切換（Zero Current Switching, ZCS）條件下同時減少循環電流，擴展柔性切換範圍，從而降低由循環電流所引起的導通損耗。為了解決這些問題，本文將APWM技術與高頻操作相結合，APWM可以在更寬的功率範圍內實現ZVS，特別是在輕負載條件下顯著提高轉換器效率。實驗設置主要由微處理器作為主要控制器，結合非對稱脈寬調變 DAB轉換器。本文建立了一個電路原型，其直流輸入電壓為400V，輸出電壓範圍為48V，工作於500kHz的切換頻率下。本文提供了詳細的模型分析，並通過模擬和實驗驗證了轉換器的可行性。

The purpose of this thesis is to develop a high-frequency Dual Active Bridge (DAB) converter with zero voltage switching using asymmetric pulse-width modulation (APWM). In traditional phase-shift modulation (PSM) DAB converters, the circulating current increases as the load decreases, which in turn affects the converter efficiency. The circulating current does not participate in the active power transfer, similar to reactive power in AC systems, but may increase the conduction and magnetic losses of the converter. The converter with APWM can reduce the circulating current while ensuring zero voltage switching (ZVS) and zero current switching (ZCS), expanding the soft switching range and thereby reducing the conduction losses caused by the circulating current. To address these issues, this research combines APWM method with high-frequency operation. APWM can achieve ZVS over a wider power range, significantly improving the converter efficiency, especially under light load conditions. The experimental setup is mainly composed of a microprocessor as the primary controller, combined with an APWM DAB converter. This research establishes a circuit prototype with a DC input voltage of 400V and an output voltage range of 48V, operating at a switching frequency of 500kHz. The detailed model analysis and experiments results are provided to verify the feasibility and performance of the proposed converter.

摘要 I
ABSTRACT II
誌謝 III
目錄 IV
表目錄 VI
圖目錄 VII
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究目的 2
1.3 論文大綱 6
第二章 傳統DAB轉換器介紹 7
2.1 DAB轉換器 7
2.2 相移式全橋轉換器 9
2.2.1 相移式全橋轉換器操作原理 10
2.2.2 相移式全橋轉換器電路分析 10
2.3 柔性切換(Soft Switching) 技術 16
2.3.1 零電壓切換(Zero Voltage Switching, ZVS) 技術 17
2.3.2 零電流切換(Zero Current Switching, ZCS) 技術 18
第三章 本文電路架構設計與研製 19
3.1 電路分析 21
3.2 電路參數設計 24
3.2.1電路規格參數 24
3.2.2電路元件參數設計 24
3.2.3變壓器設計 26
3.3 開關選擇 26
3.4 數位訊號處理器 27
3.5 周邊硬體電路 29
3.5.1閘極驅動電路 29
3.5.2電壓感測電路 31
第四章 模擬與實驗結果 32
4.1 模擬結果 32
4.2 實驗結果 35
4.2.1 電路規格及參數 35
4.2.2 實驗波形 37
4.2.3 系統效率 44
4.2.4 損耗分析 44
第五章 結論與未來研究方向 47
5.1 結論 47
5.2 未來研究方向 48
參考文獻 49

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