臺灣博碩士論文加值系統

由於智慧工廠、大數據分析與人工智慧這些新興產業逐漸成長，使得5G通訊業者不斷提升設備的效能，其中有兩項關鍵的技術分別是5G通訊設備與通訊電源設備，5G通訊設備不在本文討論的範疇，而通訊電源設備則是本文討論的重點。目前通訊電源設備由功因修正電路、隔離型直流/直流轉換器、降壓轉換器與充電器組成，一般隔離型直流/直流轉換器經常使用返馳式轉換器，其本身具有隔離效果且控制簡單、元件數量少，因此，本文提出電路以返馳式轉換器為基礎，使電路能夠提升功密度以及轉換效率。
雙開關返馳式轉換器搭載交錯式能量回收電路具有三項優點:(1)電路具有兩倍切換頻率之優勢可縮小儲能電感與電容的尺寸。(2)交錯式能量回收電路串聯於返馳式變壓器的一次側，可藉由兩顆順向式變壓器交替的回收反射電壓能量至二次側的輸出電容。(3)電路藉由迴路的設計，讓返馳式變壓器一次側的電流始終為連續狀態，並且存在一個直流值，以至於不需要緩衝電路與鉗位電路。根據本論文的研究結果顯示，該電路的轉換效率為91.5%，若將二次側的功率二極體改成功率開關時，電路轉換效率將再度提升。

Due to the growth of emerging industries such as smart manufacturing, big data analysis, and artificial intelligence industries, 5G telecommuni-cations businesses continue to improve equipment performance—particularly, 5G telecommuni-cations equipment and telecommuni-cations power supply equipment. This study focused on telecommuni-cations power supply equipment. At present, telecommuni-cations power supply equipment is composed of a power factor correction circuit, an isolated DC-to-DC converter, a buck converter, and a charger. An isolated DC-to-DC converter often comprises a tradition flyback converter and a flyback converter with synchronous rectification, which renders its control complicated. In response, this study proposed a circuit that is efficient and simple to control.
A dual-switch flyback converter with an interleaved energy recovery circuit has three advantages: (1) The circuit doubled the switching frequency, which could reduce the size of the energy storage inductor and capacitor. (2) The interleaved energy recovery circuit was connected in series to the primary side of the flyback converter, and the energy of the reflected voltage could be recovered alternately by two forward transformers to the output capacitor of the secondary side. (3) The circuit was designed such that the current on the primary side of the flyback converter always remains continuous and as a DC value, shedding the need for snubber circuit and active clamp circuit. According to the results of this study, the conversion efficiency of the circuit was 91.5 %. If the power diode on the secondary side is replaced with a power switch, the conversion efficiency of the circuit would be further improved.

摘要...i
Abstract...ii
誌謝...iii
目錄...iv
表目錄...vi
圖目錄...vii
第一章 緒論...1
1.1 研究背景...1
1.2 研究目的...2
1.3 論文大綱...3
第二章 文獻回顧...4
2.1 返馳式轉換器...4
2.1.1 動作原理...4
2.2 雙開關返馳式轉換器...6
2.2.1 動作原理...6
2.3 總結...8
第三章 雙開關返馳式轉換器搭載交錯式能量回收電路...9
3.1 電路架構 [26]...9
3.2 轉換器電路介紹...10
3.2.1 電路拓樸介紹...10
3.2.2 原理與作動分析 [26]...11
3.3 電路參數公式推導...20
3.3.1 變壓比與責任週期關係式 [26]...20
3.3.2 變壓器計算式推導...20
3.3.3 輸出電容最小值推導 [19]...23
3.4 電路設計範例 [26]...24
3.4.1 變壓比計算...25
3.4.2 變壓器邊界感值計算...25
3.4.3 變壓器感值計算...25
3.4.4 氣隙計算...26
3.4.5 匝數計算...26
3.4.6 導線計算...27
3.4.7 計算銅窗佔有率...27
3.4.8 輸出電容計算...28
3.5 控制電路...28
第四章 模擬與實際波形分析...30
4.1 隔離型三階降壓轉換器模擬與實作...30
4.1.1 SIMPLIS模擬參數...30
4.1.2 模擬波形[26]...31
4.2 雙開關返馳式轉換器搭載交錯式能量回收電路實作...34
4.2.1 系統架構...34
4.2.2 實際量測波形 [26]...35
4.3 電路效率分析...38
第五章 結論與未來研究方向...39
5.1 結論...39
5.2 未來研究方向...39
參考文獻...40
英文論文大綱

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