本論文主旨為研究三主動全橋式轉換器，應用於不斷電系統之雙向儲能裝置。首先對三主動全橋式轉換器分析其架構，探討平均功率傳遞之原理，並對其提出電路設計步驟。在閉迴路控制系統中，由於三主動全橋式轉換器為多輸入多輸出系統，傳統方法為透過解耦矩陣，簡化控制系統。而本論文提出解耦矩陣方法用於實務上之問題，並提出新的補償器設計方法。以上提出之理論與模型，皆有模擬加以驗證其正確性。
參考市售之不斷電系統之應用及規格參數，最終實際完成一台輸入電壓為170~280 VDC、雙組輸出電壓為360 VDC以及輸出功率
5 kW之三主動全橋式轉換器。採用單相移控制，來控制傳遞功率大小。實作部分透過數位訊號控制器來實現閉迴路控制。經由實驗結果顯示轉換器在不同輸入電壓之條件下，皆可以滿足電路之功能，於四點的(25%,50%,75%,100%)負載下之效率均在90%以上。

The main purpose of this thesis is to study the three active bridge converter, which is applied to the bidirectional energy storage device of the uninterruptible power system. First, the structure of the three active bridge converter is analyzed, and the principle of average power delivery is discussed. In the closed-loop control system, since the three active full bridge converter is a multiple-input multiple-output system. The traditional method is to simplify the control system through a decoupling matrix. This thesis presents the practical problems of this method and proposes a new compensator design method. The theories and models proposed above have been simulated and implemented to verify their correctness.
Considering the specifications of the uninterruptible power system, a DC-DC three active bridge converter was finally completed. With an input voltage of 170~280 Vdc, a dual output voltage of 360 Vdc, and output power of 5 kW. The power stage includes three sets of full-bridge switches, and the transmission power is controlled by the phase shift angle of the switch signal. The implementation realizes closed loop control through a digital signal controller. The experimental results show that the converter can meet the function of the circuit under different input voltage conditions, and the efficiency is above 90% under different load.

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