本論文旨在針對以輕薄短小為特點之小功率電子產品，應用壓電變壓器來研製一降壓式電源轉換器，俾以提供產品所需之低壓直流電源。此電源轉換器是以圓型疊層壓電變壓器為主要電能轉換元件，以最佳負載下所對應的諧振頻率為系統的操作頻率，配合適當的串聯電感值使電路具有零電壓切換的功能，藉由結合脈波寬度調變與定量模式的控制方法，俾使其有良好的負載調節特性且具有開路保護的功能。文中最後試製一降壓式電源轉換器，並經由實驗證實在輸入交流電壓100V~130V內可正常工作，輸出直流電壓15V、輸出電流0.51A~1.77A。

　　The purpose of this thesis is to present a piezoelectric transformer based power converter for small power devices, which need compact volume. This power converter based on round-shaped multi-layer piezoelectric transformer. The optimum-designed series inductor and switching frequency are able to keep power efficiency high while the converter can achieve zero voltage switching condition. A new control method of the combination of pulse width modulation and quantum mode control makes it possible to regulate the output voltage and provide open circuit protection. As a result, the step-down power converter implemented on a printed circuit board was experimentally evaluated and it allows 100V~130V AC input voltage range at output voltage of 15V, load current of 0.51A~1.77A.

中文摘要 I
英文摘要 II
誌謝 III
目錄 IV
圖目錄 VII
表目錄 X
符號表 XI
第一章 緒論 1
1-1 研究背景與目的 1
1-2 論文大綱 5
第二章 壓電變壓器簡介 7
2-1 前言 7
2-2 高功率型壓電變壓器 7
2-3 壓電變壓器等效電路模型建立 12
2-4 壓電變壓器的量測 16
2-4-1 小訊號量測 16
2-4-2 大功率量測 18
第三章 降壓式電源轉換器 21
3-1 前言 21
3-2 電路架構與分析方法 21
3-2-1 電路架構 21
3-2-2 雙埠網路分析法 22
3-3 壓電變壓器設計結果 28
3-3-1 設計結果 28
3-3-2 負載與諧振頻率的關係 30
3-4 輸入濾波網路 33
3-4-1 目的 33
3-4-2 種類 36
3-4-3 零電壓切換 42
3-5 輸出整流濾波電路 45
第四章 硬體電路規劃 48
4-1 前言 48
4-2 實際電路架構 48
4-3 D類半橋諧振電路 50
4-3-1 電路分析 50
4-3-2 操作頻率設定 55
4-3-3 串聯電感設計 57
4-3-4 重疊與非重疊模式 62
4-4 驅動與控制電路 65
4-4-1 脈波寬度調變電路設計 65
4-4-2 定量模式電路設計 67
4-4-3 控制電路動作說明 71
4-5 整體設計流程 72
第五章 實驗結果 76
5-1 前言 76
5-2 Is Spice軟體模擬 76
5-2-1 模擬結果 77
5-3 硬體電路製作 78
5-4 實驗量測結果 79
第六章 結論與未來研究方向 89
6-1 結論 89
6-2 未來研究方向 90
參考文獻 91
附錄 降壓式電源轉換器實體照片 96
自傳 98
著作權聲明 99

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