本論文提出一種具備功率因數校正與寬輸出電壓範圍能力的單級多諧振轉換器架構，所提系統結合前級昇壓型功率因數校正電路與後級LLCLC多諧振轉換器，並於二次側整合全橋整流與倍壓整流結構，以實現高電壓輸出與多段式增益調節，滿足不同負載與輸出需求。本電路藉由共用開關技術與脈波頻率調變控制策略，能有效降低元件數量與控制複雜度，同時具備較佳的擴充性與應用彈性。本文針對所提架構進行理論推導與模擬驗證，深入探討電壓增益行為、阻抗響應與多諧振特性，並分析操作頻率對於系統轉換效率、電流波形與開關應力的影響。此外，本文實際建構原型系統進行量測，驗證在不同輸入電壓與輸出負載條件下，皆能穩定維持輸出電壓，並具備良好的功率因數表現。本研究所提出之架構不僅維持良好效率與輸出穩定性，亦具備高整合度與實作可行性，適用於多輸出電源系統應用場域，研究成果可作為電源轉換器設計之研發參考。

This thesis proposes a single-stage multi-resonant converter architecture featuring power factor correction and a wide output voltage range. The proposed system integrates a front-end boost-type PFC circuit with a rear-end LLCLC multi-resonant converter, and combines full-bridge and voltage-doubling rectification on the secondary side to achieve high-voltage output and multi-level gain control, meeting the requirements of various loads and output conditions. By adopting switch-sharing techniques and a pulse frequency modulation control strategy, the system effectively reduces component count and control complexity, and improves application flexibility. In the study, the proposed topology is analyzed through theoretical derivation and simulation, focusing on voltage gain behavior, impedance response, and multi-resonant characteristics. The impact of switching frequency on conversion efficiency, current waveform, and switching stress is also evaluated. Furthermore, a hardware prototype is constructed and tested. Experimental results confirm that the system maintains stable output voltage and demonstrates excellent power factor performance under different input and load conditions. This proposed design maintain stable efficiency, strong stability, and a high level of integration, making it well-suited for multi-output power supply applications. The findings of this study can serve as a reference for the development of high-performance power converter designs.

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