符合IEC61000-3-2 class A電氣規範的單級全橋式交/直流變通型電源轉換器

Abstract

本文旨在探討ㄧ單級全橋式交/直流變通型電源轉換器，該轉換器主要包含輸入電流修飾器與全橋式直/直流轉換器兩大部分。電路特色主要為：使用ㄧ開關利用調整其責任週期比來控制儲能電容電壓的最大值，並探討輸入電流修飾器，以提高電源側的功率因數。 文中針對所設計的電路進行詳細的說明及分析，並以PSpice模擬軟體來進行電腦模擬以輔助相關的設計。此外，本文完成的是一部220V輸入 且660W/100V輸出的單級全橋式交/直流變通型電源轉換器雛型電路。相關的模擬與實測結果，說明本文所提出的電路具有良好的輸出特性，並能符合規範IEC61000-3-2 class A的要求。

This thesis proposes a modified single-stage full-bridge AC/DC converter complying with IEC61000-3-2 class A standard. The converter was composed of two subcircuits: an input current shaper and a full-bridge DC/DC converter. This proposed circuit has two major merits: the maximum voltage across the bulk capacitor can be suppressed by applying a dead time function to the power input switch. In addition, the high power factor of AC source was effectively kept by employing an input current shaper. The detailed design consideration and analysis are also included. The Pspice simulation software was used to carry out the computer simulation and to aid the circuit design. Finally, a 220V input and 660W/100V output prototype circuit had been implemented. The simulation and experimental results validated the feasibility of the proposed circuit, which had good performance and complies with IEC61000-3-2 class A standard.