本篇論文主要針對使用三重相移控制法之雙主動全橋式轉換器進行閉迴路設計。文中首先介紹數種用於此架構之控制法，說明各控制法之原理與特點，包含單相移控制法、擴展相移控制法與三重相移控制法，其中三重相移控制法可控制之變數相較於其他兩者更多，相對具有最多種工作模式之組合，而本文將參考另一篇三重相移控制法寬範圍輸出電壓應用設計之論文，文中分析各工作模式之關係，並透過數學模型針對輕重載條件各別選擇不同工作模式，使輕載條件下所有開關皆可達成零電壓切換，重載條件下具有最小之電感電流峰值與有效值，達成三重相移控制法之分析與優化，而基於此優化之控制法，本文將使用其選擇之工作模式作為主要分析對象。於此基礎上首先進行功率級開迴路之小訊號模型建模與推導，並介紹所使用之方法-廣義狀態空間平均法(General Average Modeling, GAM)與整個推導流程，與傳統狀態空間平均法相比，傳統狀態空間平均法僅考慮直流項，適用於交流成分小之系統，但雙主動全橋式轉換器之電感電流為純交流訊號，因此需使用廣義狀態空間平均法以表示狀態變量之平均值，由於此方法考慮諧波成分，使用越高階次諧波會使計算複雜度大幅提升，因此本文將取其直流及一階諧波項進行推導，並於章節末列出完整推導結果。再來將介紹數位控制系統之小訊號方塊圖，與整個迴路中各增益項與其所代表之意義，並探討不同相位裕度在時域中之暫態響應狀況。接著將對各工作模式下之功率級開迴路轉移函數進行分析，以分析結果進行補償器之設計，同時亦會針對系統功能之需求進行韌體規劃，包含緩啟動、調變器之邏輯調整等。最後，實測階段將以一最大輸出功率15 kW、最大輸出電流30 A、輸入電壓750 V、輸出電壓250 V~750 V之平台測試緩啟動、穩態波形、動態負載與效率等指標，以驗證其功能與表現是否與計算及模擬相符。

This thesis focuses on the design procedure of dual-active-bridge (DAB) converter with triple-phase-shift (TPS) control. The article first presents several control schemes for this structure, and explains the char-acteristics of each scheme. Among them, triple-phase-shift can control the most variables and has the most various combination. This thesis refers to another thesis for triple-phase-shift, it analyzes and optimizes the control method to achieve zero voltage switching and minimize the peak value and effective value of inductor current. Based on the optimized control method, the selected modes are used as the main analysis object of this thesis. Next, the modeling and derivation of the power stage open loop small signal model is carried out, the method used – General Average Modeling (GAM) and the whole process are introduced. Traditional state space averaging method only considers the DC term, which is suitable for systems with smaller AC term, but the inductor current of this structure is a pure AC signal, so general average modeling needs to be used to represent the av-erage value of the state variables. The use of higher-order harmonics will greatly increase the computational complexity, so this thesis will take its DC and first-order harmonic terms for derivation, and list the complete results at the end of the chapter. Next, the small signal block diagram of digital control system will be introduced, we will discuss the meaning of every blocks, the transient response of different phase margin in time do-main. Then, the power stage open loop transfer function in each modes will be analyzed, and the compensator will be designed based on the results. At the same time, the firmware will be planned according to the require-ments of the system functions, including soft start, logic adjustment of the modulator. Finally, the experimental results will be carried out on a plat-form with maximum output power of 15 kW , input voltage 750 V, and output voltage 250 V ~ 750 V. Test items include soft start, steady state waveform, load transient, and efficiency to verify whether its functions and performance can be consistent with calculations and simulations.

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