臺灣博碩士論文加值系統

本論文目的在於研製大電流輸出之全橋相移轉換器。在控制系統設計具定電壓及恆流模式的電路，最後使用控制IC UCC28950做為脈波寬度調變控制器，利用相移訊號調變工作週期，使轉換器的功率開關達到零電壓導通的特性，減少開關上的切換損失，進而提高轉換器的整體效率。最後為了考量在大電流負載下，解決電路元件的選用困難及散熱問題，實作出一台輸入直流電壓為24 V、輸出直流電壓為0-10 V、滿載電流為60 A、輸出功率為600 W之轉換器，以此單模組並聯多組，達到最大輸出電流為300 A、最大輸出功率為3 kW之轉換器。並藉由實驗測試結果，在滿載時效率可達到89.74％。

The objective of this thesis is to design and implement the full-bridge phase-shift converter for high current output. The control strategy is designed to be capable of constant voltage (CV) mode and constant current (CC) mode. Finally, IC UCC28950 as pulse-shift modulation controller, using phase shift modulation signal to control duty cycle, the zero-voltage switching (ZVS) features can effectively reduce the switching losses and raise conversion efficiency. Finally, in order to consider the high current load, to solve the difficulty of selecting suitable components and the heat dissipation problems, a design example of 600 W power converter with 24 V input voltage and 0-10 V output voltage and full load current 60 A is implemented and tested. Using a single group in parallel into multiple groups, to achieve the maximum output current of 300 A, the maximum power of 3 kW converter. Experimental results show that the maximum efficiency is 82.4%.

摘要 i
Abstract ii
誌 謝 iii
目錄 iv
圖目錄 vii
表目錄 x
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 全橋相移式轉換器架構與操作原理 4
2.1 硬性切換與柔性切換之差異 4
2.2 全橋相移式轉換器電路架構 6
2.3 主電路轉換狀態區間操作原理分析 8
2.4 定電流定電壓輸出應用介紹 18
2.4.1全橋相移轉換器之控制電路介紹 18
2.4.2定電流定電壓控制電路介紹 19
第三章 電路設計考量 22
3.1 功率晶體選擇 22
3.2 變壓器設計考量 23
3.2.1 變壓器鐵心選用 23
3.2.2 決定鐵心大小 23
3.2.3 決定一、二次側線徑大小 25
3.2.4 決定一、二次側繞線圈數 26
3.3 諧振電感設計考量 26
3.4 輸出整流濾波電路設計考量 27
3.4.1整流二極體的選用 28
3.4.2輸出濾波電感設計 28
3.4.3輸出濾波電容設計 29
3.5 控制IC簡介 30
3.5.1工作頻率 33
3.5.2死域時間控制 33
第四章 電路設計實例 35
4.1 電路規格 35
4.2 功率晶體選擇實例 35
4.3 變壓器設計實例 36
4.3.1鐵心大小選用實例 36
4.3.2一次側、二次側線徑大小設計實例 37
4.3.3決定一次側、二次側繞線圈數與圈數比 37
4.4 諧振電感設計實例 38
4.5 輸出整流濾波電路設計實例 39
4.5.1輸出整流二極體選用實例 39
4.5.2輸出濾波電感設計實例 39
4.5.3輸出濾波電容設計實例 40
第五章 實作驗證 41
5.1 單模組實測波型與數據 41
5.1.1單模組實測波形 41
5.1.2單模組實測數據 51
5.2 多模組並聯實測數據 52
5.2.1多模組實測波形 52
5.2.2多模組實測數據 54
第六章 結論與未來展望 55
6.1 結論 55
6.2 未來展望 55
參考文獻 57

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