本篇論文主要研製一寬輸出電壓範圍之高壓直流電源供應器，其控制策略綜合了全橋式串聯諧振轉換器(Full-Bridge Series Resonant Converte, FBSRC) 與全橋相移式轉換器(Phase- Shifted Full-Bridge Converter)的特點。本論文所提之控制策略具有以下特性：高壓輸出時電路工作於串聯諧振模式，電路具有零電壓切換之特性；而低壓輸出時除了藉由調變責任週期達到穩壓之外，也調整開關訊號相位作相移動作，並利用其死域時間(Dead Time)期間產生諧振使電路仍然保持零電壓切換(Zero-Voltage Switching, ZVS)特性，因此低壓或高壓輸出皆可實現高轉換效率之目的。
本論文架構選用全橋相移式串聯諧振轉換器，其在開關導通時具有零電壓切換的特性，由於輸出應用在高壓場合，故二次側使用全橋整流電路以降低電壓應力，用以提供額定功率450W、400V~ 3kV的高壓輸出。控制方面則是採用德州儀器所開發的數位訊號處理器晶片TMS320F28035來實現數位控制，最後由實驗結果驗證硬體規格雛型電路之可行性。

This thesis mainly develops a high-voltage DC power supply with a wide-range of adjustable output voltage. It focuses on the design and control of a full-bridge phase-shifted series resonant converter. The proposed full-bridge phase-shift series resonant converter features a novel two-mode operation. When low voltage output, it operates in phase-shifted PWM mode. When high voltage output, it operates in series resonant mode. In both modes, the zero voltage switching can be achieved during dead times. Therefore, the proposed converter can realize the target of high conversion efficiency for all voltage conditions.
The power-stage is a full-bridge phase-shifted series resonant converter, which has the characteristics of zero voltage switching. Since the output apply in high-pressure situations, so the secondary side choose a full bridge rectifier circuit to reduce the voltage stress. In order to implement the digital controller, the DSP chip TMS320F28035 developed by Texas Instruments is adopted. Finally, a 450W adjustable power supply with 400V input voltage and an output voltage ranging from 400V to 3000V is designed and implemented. Experimental results of the prototype converter are shown and discussed to verify the feasibility of the studied scheme.

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