臺灣博碩士論文加值系統

本論文提出一使用單輔助開關之交錯式高升壓比柔切式轉換器。該轉換器具有升壓之功能，且藉由輔助開關之導通與截止，使其主開關具有零電壓切換及零電流切換之特性，進而降低主開關之切換損失，故可提升轉換器之轉換效率及降低開關元件之切換應力。此外，利用既有之電路架構輔接一共振支路即可達成零電壓及零電流切換，故所提之轉換器亦具有架構簡單及容易實現之優點。此轉換器除可將燃料電池之輸出電壓提升至一穩定之高電壓值，使其供電至高壓直流鏈處或直接供應直流負載，同時亦可降低主開關元件之電壓及電流應力、輸入電流漣波及輸出電壓漣波。最後，並以一些模擬及實測的結果來驗證所提之交錯式高升壓比柔切式轉換器應用在燃料電池的可行性。

This thesis presents an interleaved high voltage conversion ratio converter with soft-switching by means of a single auxiliary switch. As a voltage step-up converter, it successfully performs zero voltage switching (ZVS) and zero current switching (ZCS) operations on the main switches therein through the manipulation of the single auxiliary switch. In so doing, the switching loss as well as the switching stress suffered by the main switches can be reduced significantly, that is, the conversion efficiency of the converter can be elevated considerably. Furthermore, the aim of ZVS and ZCS is reached merely by use of a resonant branch in parallel with an existing converter. Hence, this work presents a simple structured and easy to implement converter. This proposed soft switching converter not merely boosts the output voltage of a fuel cell to a high level, that is applied to a high voltage DC link or a DC load, but also reduces the current stress in main switches, the input current and the output voltage ripples. In the end, this work is applied to fuel cells and validated by some simulation and experimental results.

中文摘要….………………………………………………………….... I
英文摘要………………………………………………………………. II
致謝……………………………………………………………………. IV
目錄……………………………………………………………………. V
圖目錄…………………………………………………………………. VIII
表目錄…………………………………………………………………. XI
第一章 簡介…………………………………………………………... 1
1.1 研究背景與動機…………………………………………...... 1
1.2 研究方法…………………………………………………...... 3
1.3 論文大綱…………………………………………………...... 4
第二章 燃料電池……………………………………………………... 5
2.1 前言……………………………………..………………….... 5
2.2 燃料電池種類……………..………………………................ 6
2.2.1 質子交換膜燃料電池………………………………... 6
2.2.2 鹼性燃料電池………………………..……………..... 8
2.2.3 磷酸燃料電池………………………..……………..... 8
2.2.4 熔融碳酸鹽燃料電池………………………………... 9
2.2.5 固態氧化物燃料電池………………………………... 10
2.2.6 直接甲醇燃料電池…………………………………... 11
2.3 燃料電池之發電原理……………………...………………... 13
2.4 燃料電池特性……………..………………………................ 14
2.4.1活化極化………………..……………………………... 14
2.4.2歐姆極化………………..……………………………... 14
2.4.3濃度極化………………..……………………………... 14
2.5 燃料電池模擬模型之建立………………...………………... 15
第三章 升壓型轉換器………………………………………………... 22
3.1 前言………………………………………………………….. 22
3.2 傳統升壓型轉換器….……………...……………………….. 23
3.3 交錯式升壓型轉換器.………………………………………. 29
3.4 交錯倍壓式高升壓比轉換器………………...……………... 36
第四章 單輔助開關之交錯式高升壓比柔切式轉換器……………... 44
4.1 前言………………………………………………………….. 44
4.2 轉換器之操作模式分析….…………………………………. 45
4.3 電路元件之設計…….………………..……………………... 62
4.3.1儲能電感及輸出電容設計…..………………………... 62
4.3.2共振電感及電容設計..………………………………... 63
4.3.3主開關及輔助開關元件設計…………..……………... 64
第五章 模擬及實驗結果……………………………………………... 65
5.1 前言…………………………………………………………. 65
5.2 PIC微控制器…………………………………………..…… 65
5.3 硬體電路……………………………………………………. 67
5.3.1開關元件之觸發信號產生電路…..…………………... 67
5.3.2開關元件之驅動隔離電路……………………………. 69
5.3.3電壓控制電路…………..………..………..…………... 70
5.4 模擬結果……………………………………………………. 71
5.5 實驗結果………………………………………..…………... 78
第六章 結論…………………………………………………………... 87
6.1 總結………………………………………………………….. 87
6.2 未來研究方向….…………………………...……………….. 87
參考文獻………………………………………………………………. 89
作者簡介………………………………………………………………. 93

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