本文旨在設計及製作以數位信號處理器為基礎之全橋相移式直流-直流功率轉換器及單相三線式全橋直流-交流功率轉換器於燃料電池供電系統之應用。文中採用電壓回授及電流回授控制策略，以使全橋相移式直流-直流功率轉換器能提供穩定之電壓電源，供給直流負載或單相三線式全橋直流-交流功率轉換器使用。本系統架構含直流-直流及直流-交流功率轉換器，採用直流鏈電容值之設計來抑制直流鏈電壓之二倍市電頻率的低頻電壓漣波，間接降低電流之低頻漣波。
本文已建立功率轉換器之數學模型，並使用Matlab/Simulink模擬軟體分析整體系統，以作為數位控制器之設計依據。在實作上，本文分別以高性能、低成本的數位訊號處理器為控制核心，系統之功率轉換器控制策略皆由軟體程式完成，以減少電路元件。本文已完成500W之系統雛形，其輸入為燃料電池，直流鏈電壓約200V，輸出可供給直流及交流負載，對直流負載效率為92.6 、對交流負載效率為88 ，並由實測以驗證理論分析。

This thesis focuses on the design and implementation of a digital signal processor based phase-shift full-bridge dc-dc power converter and single-phase three-wire dc-ac power converter for fuel-cell power supply systems. According to voltage feedback and current feedback controls, the phase shifted full-bridge dc-dc power converter can provide a steady output voltage to dc load or single-phase there-wire dc-ac power converter.The proposed system consists of dc-dc and dc-ac power converters with dc-link capacitor to reduce voltage ripples on the dc-link, thereby indirectly decreasing low frequency current ripples.
In this thesis, the digitized mathematical model and controller design are built and simulated by Matlab/Simulink. Then, two high-performance, low-cost digital signal processors are used as the control core. The control of power converter is accomplished by software so as to reduce the cost. Finally, experimental results of a 500W prototype are given to justify the feasibility of the implemented fuel cell power converter system. The system uses fuel-cell as the input, and can supply dc and ac loads through power converters. Furthermore, the experiment shows efficiencies of 92.6% and 88% are obtained for dc and ac loads, respectively.

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