臺灣博碩士論文加值系統

本論文分析與實現一低輸入電流漣波KP Zeta直流轉換器，此轉換器基於國立清華大學潘晴財教授為了紀念其父親 潘恭先生(Mr. Kung Pan)百年冥誕所提之KP直流轉換器。電路架構是在傳統 Zeta型轉換器中加入一輔助電感與一輔助電容所組成。一般降低漣波的方法為增加電感值或提升開關切換頻率，使電流的變化量減少，但這些方法會增加電路的體積或切換損失。本轉換器利用一個零電感電流漣波原理的新觀念，此觀念為在不同的切換工作模式下讓電感兩端的跨壓趨近於零，因此使電感電流趨近於純直流。本轉換器之特點為控制簡單、改善傳統Zeta型輸入電流為脈動式的缺點，且在理想情況下該轉換器的輸入電流為零漣波。實際製作一雛型電路，其規格為輸入電壓為100V、輸出電壓為66V至122V
、額定功率為180W。輸出功率在60W時可達到最高效率93%。最後，在連續導通模式下提出部分實驗波形圖與波德圖，驗證轉換器之穩定性且具有升降壓功能、低輸入電流漣波特性。

In this thesis, analysis and implementation of a low input current ripple KP Zeta dc converter which is based on KP dc converter proposed by National Tsing Hua University professor Ching-Tsai Pan in memory of his father Mr. Kung Pan (K.P.) . The proposed converter is added an auxiliary inductor and capacitor into the traditional Zeta converter. Basically, the method of reducing inductor current ripple is to increase inductor value or switching frequency. However, the two ways increase either volume and weight of the converter or switching loss. The proposed KP converter uses a new principle of zero inductor current ripple (ZICR). The proposed way is to make the voltage across the inductor in different operating modes approach to zero. As a result, the current through inductor can reach pure DC. It has advantages such as simple control and improvement for pulsating input current of the traditional Zeta converter. In ideal case, the converter can achieve zero input current ripple. A prototype with 100V input voltage, 66V to 122V output voltage and 180W rating is implemented. A maximum efficiency of 93% is achieved when the load is 60W. Finally, some experimental results and Bode plots verify the stability, ability of stepping up/down and low current ripple characteristics in CCM mode of the KP converter.

摘要..................................................i
Abstract..............................................ii
誌謝..................................................iii
目錄..................................................iv
表目錄.................................................vi
圖目錄................................................vii
第一章 緒 論..........................................1
1.1 研究動機...........................................1
1.2 文獻回顧...........................................1
1.3 論文貢獻...........................................2
1.4 論文大綱...........................................2
第二章 傳統與近期升降壓型直流轉換器簡介...................3
2.1前言...............................................3
2.2傳統升降壓(buck-boost)型直流轉換器簡介................3
2.2.1傳統升降壓(buck-boost)型直流轉換器工作原理..........4
2.2.2傳統升降壓(buck-boost)型直流轉換器電路特性..........7
2.3 Cuk型直流轉換器簡介................................9
2.3.1 Cuk型直流轉換器工作原理...........................9
2.3.2 Cuk型直流轉換器電路特性..........................13
2.4傳統Zeta型直流轉換器簡介............................15
2.4.1 傳統Zeta型直流轉換器工作原理......................15
2.4.2 傳統Zeta型直流轉換器電路特性......................19
2.5結合KY型與降壓型之新型升降壓轉換器簡介................21
2.5.1結合KY型與降壓型之新型升降壓轉換器工作原理...........22
2.5.2結合KY型與降壓型之新型升降壓轉換器電路特性...........26
第三章 低輸入電流漣波KP Zeta直流轉換器特性分析............28
3.1前言...............................................28
3.2轉換器電路架構與工作原理.............................29
3.3轉換器操作於連續導通模式(CCM)之電路特性...............35
3.3.1轉換器操作於連續導通模式(CCM)之電壓增益推導..........35
3.3.2電感L1與電感L2電流漣波推導.........................36
3.3.3電容Caux、C1、Co之電壓漣波推導.....................38
3.3.4輔助電感Laux之電流漣波推導.........................40
第四章 硬體電路製作.....................................42
4.1前言...............................................42
4.2硬體電路...........................................42
4.2.1直流電源供應電路..................................43
4.2.2開關訊號控制電路(TL494)...........................44
4.2.3光耦合隔離驅動電路(HCPL-3120)................ 45
4.2.4閉迴路控制電路....................................46
4.3波德圖量測儀器(Agilent 4395A).......................47
第五章 實驗結果........................................51
5.1 前言........................................ 51
5.2 轉換器系統規格.....................................51
5.2.1電感L1、L2、Laux之電感值設計.......................51
5.2.2電容Caux、C1、Co之電容值設計.......................52
5.3穩態波形圖..........................................54
5.3.1降壓模式之穩態波形.................................54
5.3.2升壓模式之穩態波形.................................60
5.3.3傳統Zeta轉換器與KP Zeta轉換器波形比較...............67
5.4動態響應波形........................................70
5.5實測波德圖..........................................74
第六章 結論與展望.......................................76
參考文獻...............................................77
Extended Abstract.....................................80
簡歷(CV)..............................................84

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