臺灣博碩士論文加值系統

This thesis presents an LLC series-resonant converter with two transformers in parallel for the electric vehicle battery charger. This topology achieves the zero-voltage switching (ZVS) for main switches in the entire charging profile. In addition, the zero-current switching (ZCS) for output rectifier diodes is extended under charging condition. The proposed charger provides a wide range output voltage for the battery system. Moreover, in order to maintain the high efficiency under charging, the charger adopts a bidirectional switch. At low output power condition, the charger uses one transformer to transfer the energy. Finally, the design procedure is provided and implemented in a prototype charger with the input dc link 400V and the output voltage of 36-58V. Experimental results are presented to demonstrate the system performance. The maximum power is up to 700W and the peak efficiency is as high as 93.6%.

本文致力於提出新型的LLC串聯共振式轉換器，主要應用於電動車的電池充電器，此架構由兩個變壓器並聯而成。此電路可達成LLC串聯共振式轉換器柔性切換的優點，主開關可達成零電壓切換，與整流二極體可達成零電流切換。並且，所提出的充電器可應用於寬電壓範圍的電池充電器系統，而為了使充電過程中皆可達到高效率，並且新增一雙向式開關於電路中。當充電器操作於低功率輸出時，可切換至單一變壓器傳遞能量，降低系統損失。
最後，本文提供設計流程範例與實驗原型電路的實驗結果，驗證轉換器之效果，其輸入直流電壓400V和輸出電壓36-58V，最高功率為700W，以及最高效率高達93.6%。

目錄
摘要 i
Abstract ii
致謝 iii
目錄 iv
圖目錄 vi
表目錄 viii
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究目的 2
1.3 內容大綱 3
第二章 磷酸鋰鐵電池介紹 4
2.1 常見電池之簡介 4
2.2 磷酸鋰鐵電池 5
2.3 電池充電技術 9
第三章 共振式轉換器簡介 13
3.1 半橋電路 13
3.2 串聯共振式轉換器 15
3.3 並聯共振式轉換器 17
3.3 LLC串聯共振式轉換器 19
第四章 電路架構設計與研製 26
4.1 電路特色分析 26
4.2 電路暫態分析 29
4.2 共振槽參數設計 30
4.3 開關元件選擇 33
4.4 控制IC 34
第五章 實驗結果 35
5.1 電路規格 35
5.2 實驗波形量測 36
第六章 結論與未來研究方向 41
6.1 結論 41
6.2 未來研究方向 42
參考文獻 43

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