隨著全球環保意識的提升，電動車已逐漸成為交通運輸的發展趨勢。由於不同類型電動車的電壓與功率規格各異，電動車充電器必須具備寬輸出電壓範圍的特性，才能滿足多樣化的充電需求。因此，本論文旨在研發一種具有電壓平衡控制與寬輸出電壓範圍之轉換器架構，並針對其電路設計、控制方法及實驗結果進行深入分析與探討。
本論文提出一種隔離型三階式直流-直流轉換器，結合雙主動橋電路架構，並將對稱相移控制與電壓平衡控制方法整合至系統中。此方法在實現寬輸出電壓範圍的同時，能有效解決三階式直流-直流轉換器因元件不匹配或開關時間不對稱所引起的電容電壓不平衡問題。透過實驗驗證，本論文所提出的架構具有可行性。此外，本文還提出一種二次側有源橋式整流器的串並聯組合設計。在低輸出電壓時，二次側電路採並聯組合；而在高輸出電壓時，則採串聯組合。與單一電路相比，二次側的串並聯組合設計可進一步擴展輸出電壓範圍，並提升轉換效率。本論文所設計的電路系統不僅具備寬輸出電壓範圍和輸入側電容電壓平衡特性，並在負載變動時，足以穩定維持輸出電壓，對於電動車充電器的設計與開發具有參考價值。

With the growing global awareness of environmental protection, electric vehicles (EVs) have gradually become a major trend in transportation development. Since different types of EVs have varying voltage and power specifications, EV chargers must feature a wide output voltage range to accommodate diverse charging requirements. Therefore, this dissertation aims to develop a converter architecture that incorporates voltage balancing control and a wide output voltage range, with detailed analyses and discussions on its circuit design, control method, and experimental results.
This dissertation proposes an isolated three-phase DC-DC converter integrated with a dual-active bridge (DAB) circuit structure, which also incorporates symmetric phase-shift control along with voltage balance control methods. This approach not only achieves a wide output voltage range but also effectively resolves the capacitor voltage imbalance caused by component mismatch or asymmetric switching times in three-phase DC-DC converters. The feasibility of the proposed architecture is validated through experiments. Moreover, this dissertation presents a series-parallel combination design for the secondary side active bridge rectifier. At low output voltage, the secondary circuit operates in parallel, while at high output voltage, it operates in series. Compared to a single circuit, the series-parallel combination design on the secondary side further extends the output voltage range and improves conversion efficiency. This designed circuit system not only features a wide output voltage range and input-side capacitor voltage balancing characteristics but also maintains stable output voltage during load variations, making it a valuable reference for the design and development of electric vehicle chargers.

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