本文旨在研發以數位信號處理器為基礎之多組輸出直流電源，以提供工業設備所需之直流電源。本文所提之系統分成電源轉換器、數位控制器及人機介面等三大架構。首先，對於電能轉換器方面，分為前級全橋式直流對直流功率轉換電路，與後級多組輸出電路；前級部分藉由柔切技術，達到零電壓切換以降低開關切換損失，俾提高系統效率；後級部分則運用多組降壓電路並聯組合而成，以提供不同的負載需求。其次，對於數位控制器部分，其核心控制元件採德州儀器公司生產之數位信號處理器（型號：TMS320LF2407A），作為發展平台，藉由數位信號處理器之優越控制與運算能力，可實現相移控制以達成柔切技術；再者，利用DSP之內建高精度A/D轉換器擷取電壓物理量，進行閉迴路迴授控制，使各組直流電源得以準確輸出，且可監測系統狀態，以適時保護。同時，系統將利用DSP實現人機操控介面及通信介面功能，以利於系統操作、監控與資訊傳遞，進而提高現場維護之便利性與安全性。最後，本文已順利研發出三組直流輸出可調之轉換器，輸入電壓為110V/60Hz，輸出最高為24V，三組總功率為200W且各組輸出電壓最大誤差為2.5％之實體製作。

The purpose of this thesis is to design a multiple-output dc power converter system based on digital signal processors. This work can be uesd for the various dc source of industrial equipment. This system consists of power converters, digital controller, and man-machine interface. First, the power converter circuit is composed of a full-bridge dc-dc conversion circuit, and a multi-output circuit. The former part, the conversion circuit, applied with soft-switching technology to achieve zero voltage switching (ZVS), can decrease switching loss and increase system efficiency. And latter part, the multi-output circuit using parallel combinations of buck circuits can provide for multiple output levels. Second, the development platform uses the digital signal processor (DSP Model: TMS320LF2407A), produced by Texas Instruments. With the superiority of the phase shift control of the DSP, the work accomplishes the soft-swithching technology. Furthermore, with the built-in high-precision A/D converters, and the closed-loop feedback control, the DSP can output accurately DC voltage, monitor system status, and perform timely protection. Meanwhile, the system uses the DSP to accomplish man-machine and communication interfaces. The interfaces facilitate system operation, monitoring, and information exchange and improve the convenience of field maintenance and security. Finally, three experimental systems of 24V, 200W output power for 110V, 60Hz input are built with the maximum output voltage error less than 2.5%.

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