摘 要
本論文旨在研製一台符合EMI及PFC規格之直流電源系統，以供配電自動化設備的使用，該系統之電路係由電磁干擾濾波器、功率因數修正器、直流/直流轉換器及含溫度補償裝置之四階段鉛酸蓄電池充電器等所組成。系統中的功率因數修正器與直流/直流轉換器兩種電路的設計，將以一顆具備上述兩種功能之組合控制晶片FAN4803來實現。而為達到電池的最佳狀態，進而提升電池壽命，系統的充電電路也將依據電池不同的電壓狀態分別提供四種不同的充電模式。最後，由實驗中所獲得的數據與波形驗證了電路設計之正確性。

Abstract
The main objective of this thesis is to implement a DC power supply system for Distribution automation appliance, which satisfies the standard of electromagnetic interference (EMI) and low-order current harmonics. The power supply system consists of an EMI filter, a power factor corrector (PFC), a DC/DC converter, and a four-stage lead-acid battery charger with temperature compensation. The functions of power factor correction and DC/DC conversion in this system are fulfilled with a single control chip, FAN4803. Furthermore, in order to provide the best charging characteristics and to increase the lifetime of the battery, the charger will operates four charging modes according to the voltage status. Finally, the recorded data and waveforms from the experiments show the correctness of the design.

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