臺灣博碩士論文加值系統

傳統串聯諧振電路使用的變壓器為一二次側各一線圈，內部擁有漏電感、激磁電感，使電路能夠正常傳遞能量與運作。而本文所提到的整合型變壓器即是將類似三個變壓器組合在一起使用，藉由磁路的方向設計，使磁通量互相抵銷進而降低激磁電感，得以使變壓器在不加氣隙情況下，仍然有夠低的激磁電感使開關零電壓切換。此外，也因變壓器擁有三組二次側中心抽頭並聯，使二次側電流分流，因此能選擇耐流更小的開關元件，同時有效降低電流經過同步整流開關產生的導通損耗。因此本文將整合型變壓器使用在具有零電壓切換的串聯諧振電路中，較低的激磁電感能發揮其優勢，二次側方面使用同步整流開關，可大幅減小輸出大電流時的導通損耗，最後使用平板線圈取代了一般繞線架繞製的變壓器。
本論文最終實現一台操作在300 kHz輸入電壓380 V輸出12 V額定功率700 W半橋串聯諧振轉換器，實驗結果經驗證後效率最高可達97.5%。

Series resonant converter usually uses a transformer which has primary side and secondary side. Leakage inductance and exciting inductance make sure that series resonant converter work correctly. This thesis applies integrated transformer which combined with three transformers. Proper core design can resist the magnet flux. It can also decrease the exciting inductance. Therefore, the transformer doesn’t need additional air gap. Lower exciting inductance value can make sure the converter reaching zero-voltage switching. Because the transformer has three center-tapped winding which is parallel-connected to secondary sides, the converter can share the secondary current. Consequently, the components can be chosen with smaller current stress. Synchronous rectification switches effectively reduce the conduction loss. This thesis uses integrated transformer to obtain lower exciting inductance and conduction loss. In addition, a plane transformer takes the place of winding transformer.
A half-bridge series resonant converter operated at 300 kHz is implemented to perform the conversion of 380 V to 12 V with rated power of 700 W. The experimental results show that the efficiency can be up to 97.5%.

摘　要 ii
Abstract iii
誌　謝 iv
目　錄 v
圖索引 vii
表索引 ix
第一章 緒論 1
1.1研究動機與目的 1
1.2內文編排方式 2
第二章 磁性元件介紹 3
2.1磁性元件簡介 3
2.2傳統型鐵芯介紹 4
2.3整合型鐵芯介紹 5
第三章 串聯諧振轉換器原理 9
3.1串聯諧振式轉換器工作區間 9
3.2半橋諧振式轉換器動作分析 12
3.3諧振槽轉移函數分析 21
第四章 電路參數設計與分析 24
4.1功率開關選擇 24
4.2整合型變壓器參數設計 25
4.3平板變壓器設計 30
4.4電路諧振槽設計 33
第五章 實驗數據與結果 39
5.1實測波形 40
5.2實測數據 45
第六章 結論與未來展望 46
6.1結論 46
6.2未來展望 47
參考文獻 48

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