本論文主要是針對轉換式電源供應器提出設計傳導性電磁干擾濾波器之研究，首先介紹量測傳導性電磁干擾所使用之儀器，分析電源供應器因切換電晶體、變壓器、整流二極體在切換過程中產生傳導性電磁干擾的原因以及共模、差模電磁干擾雜訊傳輸路徑。說明濾波器中電容與電感雜散元件特性；詳細提出設計濾波器之架構和程序。最後針對一250W單相電源供應器及80W換流器設計傳導性電磁干擾濾波器作實驗分析，由實驗結果可驗證本輸入濾波器之設計對傳導性電磁干擾確有防治之可行性。

An investigation of the electromagnetic interference (EMI) filters design for the switching-mode power supply is proposed in this thesis. This begins with an introduction of the conducted interference caused from switching-transistors, transformers, rectifier diodes, during the switching process in a switching-mode power supply. It is followed by an examination to the design scheme and procedure of EMI filters in anticipation to solve such problems. A laboratory test has also been performed through the experimental analysis using a 250W switching-mode power supply and 80W converter. Test results have demonstrated the feasibility of the method for the mitigation of conducted electromagnetic interference.

第一章 緒論 1
第二章 EMI產生之原因及抑制方法 3
第三章 EMI之規範及儀器量測簡介 20
第四章 轉換式電源供應器傳導性EMI之分析 28
第五章 轉換式電源供應器EMI濾波器之架構與設計 36
第六章 實驗證明與討論 56
第七章 結論與未來研究方向 70

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