臺灣博碩士論文加值系統

近年來，電動汽車的發展受到重視，而電池充電器為電動車發展之核心，因此雙向電力轉換器之需求增加。本文研製「三相主動雙橋式雙向直流轉換器」搭配48V/20AH之磷酸鋰鐵電池，實現電動車電池充/放電系統。為了提升轉換器之效率，本文提出一種混合調變法來改善輕載運轉之效率。針對調變之分析而研擬出電池充/放電策略，並由實驗結果驗證其可行性。最後，使用LabVIEW圖控軟體和CAN-bus通訊協定產生電流命令，並傳至數位訊號處理器(DSP)實現轉換器之控制。

Recently, the development of electric vehicles (EVs) is valued, and the battery charger is the core of the development of EVs. Therefore, a requirement of the bidirectional power converter is increased. In the thesis, a three-phase dual-active-bridge bidirectional DC converter with a pack of 48V/20AH LiFePO4 batteries is developed to implement a charging/discharging EV battery system. To improve efficiency of the converter, a hybrid modulation is proposed and used to boost efficiency under the light-load condition. A charging/discharging strategy of battery is planned by analysis of the modulation, and validate effectiveness of the strategy was verified from experimeantal results. Finally, the LabVIEW graphical software and CAN-bus protocol are used to produce the current command, which is sent into a digital signal process (DSP) to realize the control of the converter.

摘要 iii
Abstract iv
目錄 v
圖次 vii
表次 xii
第一章 緒論 1
1.1 簡介 1
1.2 研究動機與目的 2
第二章 文獻回顧 3
2.1 簡介 3
2.2 雙向直流轉換器之分類 5
2.3 單相隔離型之雙向直流轉換器 6
2.4 多相隔離型之雙向直流轉換器 11
2.5 總結 13
第三章 電路架構及原理分析 14
3.1 簡介 14
3.2 動作原理 14
3.3 電路分析 19
3.3.1 相移調變之電路分析 19
3.3.2 梯形調變之電路分析 30
3.4 轉換器傳輸功率推導 50
3.4.1 相移調變 50
3.4.2 梯形調變 55
3.5 損失分析 57
3.5.1 開關傳導損失 60
3.5.2 開關切換損失 62
3.5.3 變壓器損失 65
 
第四章 實驗電路設計 66
4.1 電路參數之設計 66
4.2 實驗平台 69
4.3 混合調變策略設計 70
4.4 定電流/定電壓控制之流程 76
4.5 高頻變壓器設計 77
4.6 案例討論 77
4.6.1 案例分析 82
4.6.2 結論 92
第五章 實驗結果與分析 93
5.1 簡介 93
5.2 充電模式之實驗分析 94
5.2.1 穩態波形分析 94
5.2.2 開關切換分析 98
5.3 定電流/定電壓充電之實驗分析 107
5.4 放電模式之實驗分析 108
5.5 效率與損失分析 111
第六章 結論與未來研究方向 113
參考文獻 114
附錄 119

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