本論文提出一高升壓降壓比直流雙向轉換器，此轉換器結合了Zeta拓樸、耦合電感、箝位拓樸與倍壓拓樸；另有能量回收機制回收耦合電感中的漏電感能量。而開關跨壓被箝位拓樸所限制，倍壓拓樸則能夠提升轉換器的電壓轉換率。本篇論文中也介紹並實現了快速功率換向的功能；轉換器的規格為低壓側電壓48伏、高壓側電壓為400伏、額定輸出功率為300瓦，並能夠在300μs以內完成升壓模式至降壓模式的快速功率轉換功能，1.6ms以內完成降模式至升壓模式的快速功率轉換功能；升壓模式中最高效率為91.56%，降壓模式最高效率為88.14%。

In this thesis, a high step-up step-down bidirectional DC-DC converter is proposed and implemented. The converter combines the Zeta topology, coupled inductance, clamping topology and voltage multiplying topology. The energy of the leakage inductance is recycled and the voltage stress of the switches are clamped by the clamping capacitance, the voltage multiplying topology also increases the voltage conversion ratio of the converter. The fast power transition is also featured and implemented in this thesis.
The specifications of the converter are with low side voltage 48 volts and high side voltage 400 volts, 300 W rated output power. The step-up mode to step-down mode transition is able to complete under 300μs, step-down mode to step-up mode transition completed under 1.6ms; maximum efficiency of step-up mode and step-down mode is 91.56% and 88.14%, separately.

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