具可調式輸出電壓之雙向直流－直流切換電容式轉器

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姓名

賴琨互(Kuen-Hu Lai) 查詢紙本館藏

畢業系所

電機工程學系

論文名稱

具可調式輸出電壓之雙向直流－直流切換電容式轉器
(Bi-Directional Switching-Capacitor based DC to DC Converter with Adjustable Output Voltage)

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摘要(中)

本篇論文提出一個切換式電容雙向直流－直流轉換器並在順向輸出端利用電感之設計來達到順向輸出電壓可調整之目的。本論文設計兩組切換式電容，順向升壓時可以基於一個固定的輸入電壓源來達到多組輸出，範圍約在2倍壓至3倍壓之間做調整；逆向降壓時約可以由1/2倍至1/3倍做降壓。電路的主體以充電電荷泵浦（Charge Pump）為基礎，結合切換電容式轉換器（Switching Capacitor Converter）架構來作為此論文的主電路，利用輸出電感之設計變化，可以藉由讓電感工作在連續導通區間（CCM）與不連續導通區間（DCM）來調整順向輸出電壓。輸出電壓調整可以藉由改變上臂開關之責任週期D（Duty Cycle）來讓輸出達到2+D倍的效果。
　　本論文最後以分析、模擬及實驗波形驗證實驗之結果，整體效率最大為96.27 %，最低為88.68%，平均轉換效率約為92.34%。本文設計之轉換器與羅轉換器（Luo Converter）相比，不僅降低元件數還提升了輸出之可調性；與傳統2+D倍轉換器相比，傳統架構調整頻率（Frequency）所得到電壓調幅是狹隘的。若改為調整責任週期，可讓電壓轉換做大幅調整也因為如此效率也大大提升。

摘要(英)

This study proposed a bidirectional DC/DC switched capacitor converter with inductor attached at the forward output terminal to provide adjustable forward output voltage. We developed 2 switched capacitors capable of multiple outputs ranging from about 2 to 3 times the input voltage based on a fixed input voltage source during forward boost with output ranging from about 1/2 to 1/3 times the input voltage during reverse buck. The main part of the circuit is based on a charge pump, combining the structure of a switched-capacitor DC/DC converter as our main circuit. The inductor at the output terminal was designed to work between continuous conduction mode (CCM) and discontinuous conduction mode (DCM) to enable the adjustment of forward output voltage. Output voltage can be altered by modifying the duty cycle (D) of the upper-arm MOS switch, thereby enabling the output to reach 2 + D volts Finally, the analysis of waveform simulations verified the experimental results, which presented a maximum efficiency rate of 96.27% , minimum efficiency rate of 88.68% and average conversion rate of approximately 92.34%. Using fewer components than a Luo converter, the proposed devise actually provides superior adjustability of the output. Compared with conventional 2 + D times converters, adjusting the frequency resulted in a narrow voltage amplitude modulation; adjusting the duty cycle provided adjustability in voltage conversion to enhance efficiency.

關鍵字(中)

★ 充電電荷泵浦
★ 雙向
★ 直流-直流轉換器
★ 切換電容式

關鍵字(英)

★ Charge Pump
★ Bidirectional
★ DC-DC Converter
★ Switched-capacitor

論文目次

摘要 i
Abstract ii
誌謝 iii
目錄 iv
圖目錄 vi
表目錄 xi
第一章緒論 1
1-1 研究動機 1
1-2研究目的 2
1-3論文架構介紹 2
第二章切換式電容升壓電路發展 3
2-1 傳統切換式電容電路介紹 3
2-2 切換式電容升壓電路優勢與應用面 13
2-3 雙向切換式電容升壓電路與發展 14
2-4 電路元件 17
2-4-1金屬化聚酯膜電容(MEF) 17
2-4-2電感類型 19
第三章電路架構討論 21
3-1 電路主架構分析 21
3-2 切換時序圖 24
3-2-1 順向(Forward)切換時序圖 27
3-2-2 逆向(Reverse)切換時序圖 32
3-3 電壓增益推導 35
3-4 電容值設計及漣波計算 37
3-5 電感值設計及漣波計算 40
3-6電感漣波計算 42
3-7 小訊號分析 45
第四章模擬分析與實作 49
4-1 PSIM模擬電路之波形 49
4-2 電路實作 55
4-2-1 控制電路板 55
4-2-2 切換電容式電路板 63
4-2-3 波形及轉換效率 65
4-3 回授控制 72
第五章結論與未來展望 77
5-1 結論 77
5-2 未來展望 78
參考文獻 79

參考文獻

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指導教授

徐國鎧(Kuo-Kai Shyu)

審核日期

2014-8-12

推文