本論文旨在提出一種快速能量轉換之技術，使功率流能快速且安全地改變，
並以一雙向軟切換直流-直流轉換器為電路主架構。主要應用於儲能系統之電
池與直流匯流排之間的能量傳遞。
首先文中將分別討論升壓模式與降壓模式的工作原理，接著將介紹電路之
穩態分析及元件參數設計。在電路中加入電容元件之轉態機制，運用電感與電
容諧振特性可達快速能量方向轉換，並且對快速能量方向轉換機制的工作模式
作分析。除了電路的分析，本論文以數位訊號處理器作為控制平台，搭配數位
控制擬定策略，完成能量之快速轉換。
最後，研製一 48V/400V，滿載 1000W 且切換頻率為 100 kHz 之快速雙向
轉換轉換器，透過實驗結果來驗證快速能量方向轉換之可行性。升壓模式的最
高效率為 94%且滿載效率為 91.47%，降壓模式為 92.84%且滿載效率為 91.82%。
當轉換器操作在任何負載，功率流皆能在一個切換週期(10 ??)內轉換。此外透
過電流控制模式之補償，轉換器在升壓模式切換至降壓模式下可於 3 ms 之內
達到穩態，亦可在降壓模式切換至升壓模式下可於 4 ms 之內達到穩態。

In this thesis, a technology for rapid energy transition is proposed, to make the direction of power flow change quickly and safely. The soft-switching bidirectional DC-DC converter is used as the circuit architecture, which is mainly applied to the energy transition between the DC bus and the battery side.
First, the operating principles of the step-up mode and the step-down mode will be discussed, respectively. The steady-state analysis and component parameter design are also introduced. Furthermore, a novel mechanism with a capacitor inserted to the circuit for rapid energy transition is proposed, thereby converting the energy effectively. The transition state will be analyzed, as well as the operating mode of the mechanism for energy transition. The digital control is used to complete the rapid energy transition.
Finally, a prototype converter with for 48V/400V, output power of 1kW and switching frequency of 100 kHz is implemented to confirm the feasibility of rapid energy transition. The highest efficiency is 94% in step-up mode, and 91.47% under full load. The highest efficiency is 92.84% in step-down mode, and 91.82% under full load. The time of direction for power flow can be reversed less than one switching cycle (10 ??). Also, the time of converter entering to the steady state is less than 3 ms from step-up mode to step-down mode, and less than 4 ms from step-down mode to step-up mode by digital compensation.

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