本論文研製一隔離型雙向諧振轉換器，可應用於電動車中直流高壓母線及電池端間之能量傳遞，轉換器架構係結合雙半橋及LLCL諧振槽原型所組成。諧振轉換器利用電感器及電容器諧振來達到軟切換特性，藉此降低切換損失，不僅具有高效率之優勢，其本身諧振電感及諧振電容呈正弦規律變化之過零點特性，亦為雙向快速轉態開創完美條件，最終結合控制策略使轉換器能夠在兼具安全及快速下完成功率轉換。
本論文首先分析此雙向轉換器之動作原理，藉由推導穩態等效模型及電壓增益曲線，設計期望之電路規格參數，並以SIMPLIS模擬結果先行驗證快速安全轉態控制之可行性，最終實作一規格為低壓側電壓48V，高壓側電壓為400V，滿載功率為1kW之雙向功率轉換電路，以驗證理論分析。
此轉換器操作於順向模式下之最高轉換效率為91.5%，操作於反向模式下之最高轉換效率為88.2%，從順向模式轉換為反向模式之功率流轉換約為10 μs，從反向模式轉換為順向模式之功率流轉換約為6.6 μs。

In this thesis, an isolated bidirectional resonant converter, which can be applied to the energy transfer between the DC high-voltage bus and the battery in the electric vehicles. The converter topology is composed of a dual half-bridge and an LLCL resonant tank prototype. The resonant converter uses inductor and capacitor resonance to achieve soft switching characteristics, thereby reducing switching loss and improving efficiency. The zero-crossing characteristic of the resonant elements that change sinusoidally also creates perfect conditions for bidirectional fast transitions. By combining the control strategy, the converter can complete the power transition under both safety and speed.
This thesis analyzes the operating principles of the bidirectional converter. The parameters designed is obtained from the steady-state equivalent models and the voltage gain curves. The SIMPLIS simulation results were used to verify the feasibility of fast and safe transition control. The bidirectional converter with low-side voltage of 48V, high-side voltage of 400V, and full load of 1kW was implemented to verify the theoretical analysis.
The maximum efficiency of the converter is 91.5% in forward mode and 88.2% in backward mode. The power flow transition from forward mode to backward mode is about 10 μs. The power flow transition from backward mode to forward mode is about 6.6 μs.

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