本篇論文主要研製一台儀器應用之150W 輔助電源供應器，並且具有多組隔離輸出與低穩壓率的優點。本文係研究三級之電路架構，第一級電路為升壓型功率因數修正轉換器，第二級電路為具有耦合電感之雙晶順向式轉換器，第三級電路包含降壓型轉換器、同步降壓型轉換器與升降壓型轉換器。所研製之輔助電源供應器具有過電壓、過電流及過載保護設計。
雛型電路的實驗測量結果證實了其可行性，並與本文提及之理論相互驗證。

In this thesis, a 150-watt auxiliary power supply featuring advantages of isolated multiple outputs and tight regulation for instrument applications is developed. A three-stage circuit is studied. The first-stage circuit consists of a boost power factor correction (PFC) converter. The second-stage circuit consists of a two-switch forward converter with coupled inductors. The third-stage circuit comprise a buck converter, a synchronous buck converter and a buck-boost converter. The developed auxiliary power supply has over-voltage protection (OVP), over-current protection (OCP), over-load protection (OLP) design.
Experimental results of a prototype circuit are shown to verify the feasibility and theoretical analysis of the proposed scheme.

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