臺灣博碩士論文加值系統

隨著對電能轉換器效率的要求，一些寬能隙材料之電力電子元件被發展出來
，這些寬能隙材料之電力電子元件具有優異的切換特性，可提升效率，增加切換頻率，有助於提高電能轉換器的能量密度，交流-直流轉換器用在將市電之交流電能轉換成直流電能供應直流負載，本文將發展利用SiC元件之共地型交流-直流轉換器，共地型交流-直流轉換器可控制輸入電流為具單位功因之弦波電流，提供穩定的直流滙流排電壓，並藉由SiC元件之使用提升轉換效率，而採用共地型架構可箝住交流-直流轉換器直流滙流排負端電壓至市電的地電位，可有效降低直流負載對地之洩漏電流，本文並將發展硬體雛型來驗證共地型交流-直流轉換器之性能及不同材料電力電子元件之效率。

With the requirement for the power efficiency of power converter, several wide band-gap power electronic components have been developed. The wide band-gap power electronic components have excellent switching characteristics, which can improve power efficiency, increase switching frequency, and improve the energy density of power converter. The AC-DC power converter is used to convert AC power of the utility into DC power to supply the DC load. This thesis develops a common-ground AC-DC power converter, which is implemented by the SiC components. The common-ground AC-DC power converter can control the input current to be a sine-wave current with a unit power factor, and provide a stable DC bus voltage. The use of SiC components improves the power efficiency. The common-ground structure clamps the negative terminal voltage of the DC bus of the AC-DC power converter to the ground potential of utility, which can effectively reduce the leakage current of the DC load to the ground. This thesis will develop a hardware prototype to verify the performance of the common-ground AC-DC power converter and the power efficiency for using power electronic components of different materials.

摘要 i
Abstract ii
致謝 iii
目 錄 iv
圖目錄 vi
表目錄 viii
第一章 緒論 1
1-1 前言 1
1-2 研究動機與目標 1
1-3 論文大綱 2
第二章 交流-直流轉換器 3
2-1 整流器 3
2-2 功率因數修正 10
2-2-1 功率因素的定義 10
2-2-2功率因數修正器 11
2-3 SiC半導體元件 15
第三章 共地型交流-直流轉換器 18
3-1 電路架構 18
3.2 電路操作 19
3-3 控制方塊 24
第四章 實測結果 26
4-1 使用Si IGBT雛型 29
4-2 使用SiC MOSFET雛型之實測結果 29
4-3 效率 30
4-4 成本比較 30
第五章 結論與未來研究方向 35
5-1結論 35
5-2 未來研究方向 35
參考文獻 36

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