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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/65791

    Title: 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
    Authors: 賴琨互;Lai,Kuen-Hu
    Contributors: 電機工程學系
    Keywords: 充電電荷泵浦;雙向;直流-直流轉換器;切換電容式;Charge Pump;Bidirectional;DC-DC Converter;Switched-capacitor
    Date: 2014-08-12
    Issue Date: 2014-10-15 17:10:26 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 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。
    ;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.
    Appears in Collections:[電機工程研究所] 博碩士論文

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