本論文旨在研製一具自然換向之隔離型雙向諧振轉換器，能隨著功率潮流在不改變控制法的情況下達成自然換向，其電路特性相當於直流變壓器；可應用於區域型直流微電網中做電氣隔離。從效率、控制難易度及製作成本的觀點來分析，皆優於傳統的隔離雙向轉換器。本論文詳細分析電路架構之工作原理，最後透過實作出一台原型機測試並驗證此架構的可行性，能夠實現高效率與簡單的控制。

This thesis presents the study and implementation of an isolated bidirectional resonant converter with natural commutation. It can be operated in natural commutation without additional control. The proposed isolated bidirectional converter works like a DC transformer, which can be applied for DC micro-grid systems. Compared with the conventional phase-shifted full-bridge converter and current-fed full-bridge converter, the proposed converter presents better performance in efficiency, control and cost. The operating principles and design considerations are discussed and analyzed in details. Finally, a laboratory prototype converter has been built and tested to verify the feasibility of the proposed scheme. High efficiency and simple control can be achieved.

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