本論文主旨為研究三主動全橋式轉換器，以能量回收系統為目的，選用此電路取代兩組雙主動全橋式轉換器電路，減少能量傳遞過程中經過的元件及功耗，來達到更高效率的提升。本文使用單相移控制法之寬範圍輸出電壓應用，加入解耦控制以期望系統兩輸出端達到不相互影響之成效，並進行模擬驗證其可靠性。文中首先針對三主動全橋式轉換器之電路架構、控制法及動作區間分析進行說明，再針對電路之設計流程、小信號建模與解耦矩陣進行推導，最後利用模擬與實測驗證轉換器之功能。開迴路小信號建模使用廣義狀態空間平均法(General Average Modeling, GAM)，此方法與傳統的狀態空間平均法相比更適合應用於此架構。傳統狀態空間平均法僅考慮到直流項，適用於交流成分小的系統。三主動全橋式轉換器之電感電流為純交流訊號，因此不適用於傳統狀態空間平均法。需改使用廣義狀態空間平均法對電路進行建模，推導電路之開迴路小信號，並對解耦矩陣作推導分析，將矩陣加入至系統中進行控制，完成兩輸出不相互影響之閉迴路系統。最後，以寬範圍輸出電壓之規格對電路進行設計，以最大輸出功率60 kW進行解耦控制之閉迴路模擬驗證，並以28 kW作為實作之最大輸出功率，量測穩態波形及效率。

The main purpose of this thesis is to study the application of triple active bridge converter in energy recovery system, which is to replace two sets of dual-active-bridge (DAB) converters is the best way to improve efficiency. The advantage is to reduce the number of components and power consumption in the process of energy transfer. This article proposes a single input and dual wide range output. Two output loads can be controlled independently using single phase shift (SPS) control. To achieve the system of two output ports do not affect each other by decoupling control, also conducts simulations to verify its reliability. The seven main concepts will be mentioned: Explain the topology, control method, analysis sequence, design method, small-signal modeling, and decoupling matrix of triple-active-bridge, also verify the converter function by simulation and actual measurement. The open-loop small-signal modeling uses the General Average Modeling (GAM), which is more suitable for this topology than the traditional State Space Averaging (SSA) method. State Space Averaging method is suitable for systems with DC term and small AC term. However, the inductor current of the triple-active-bridge converter is a pure AC signal. Therefore, it is not suitable for the State Space Averaging method. It is necessary to model and derive the open-loop small signal, and analyze the decoupling matrix of the circuit by General Average Modeling. Adding a matrix system for control to complete the closed-loop system with two outputs that do not affect each other. Considering the relevant specification of energy recovery system. A triple active bridge converter with a wide range of output voltage, and the maximum output power of 60 kW is used for closed-loop simulation verification of decoupling control. The maximum output power of 28 kW is used as the actual maximum output power to measure the steady state waveform and efficiency.

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