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研究生:黃少崴
研究生(外文):HuangShao-wei
論文名稱:新型零電流切換脈波寬度調變降壓式蓄電池充電器
論文名稱(外文):A Novel Zero-Current-Switching Pulse-Width-ModulatedBuck Converter for Battery Chargers
指導教授:柯裕隆
指導教授(外文):Yu-Lung Ke
學位類別:碩士
校院名稱:崑山科技大學
系所名稱:電機工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2006
畢業學年度:94
語文別:中文
論文頁數:84
中文關鍵詞:充電器共振降壓式轉換器電池
外文關鍵詞:Buck ConverterChargerBatteryResonant
相關次數:
  • 被引用被引用:6
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  • 下載下載:217
  • 收藏至我的研究室書目清單書目收藏:2
共振式轉換器具有低切換損失、電路體積小、重量輕及高功率密度等優點,已被大量運用於各類高頻切換式轉換器以取代傳統硬切換式轉換器。為了能夠更有彈性地控制共振式轉換器,本論文提出一新型的零電流切換脈波寬度調變降壓式轉換器應用於蓄電池充電器。此種新型的蓄電池充電器是於共振迴路中再加入一輔助開關,能夠更準確地控制共振時間,使得充電器不僅同時具有硬式轉換器與共振式轉換器之優點,更涵貍w頻控制、減小共振時間,並使充電器中所有的開關元件均能操作於零電流切換情況,明顯地降低切換損失,使充電器電路更適合操作於高頻而獲得高充電效率的表現。
本文針對兩個主動開關的切換,採取脈波寬度調變的控制方式,再依據開關導通情形分析電路工作原理,建立電路的操作模式與等效電路,並以此等效電路為基礎,推導電路參數的設計方程式。實際電路量測結果驗證所提新型蓄電池充電器之理論有效性,實際平均充電效率高達90% 以上,令人相當滿意。
The resonant converter provides the advantages of low switching losses, small circuit volume, light weight and high power density. Various high-frequency switching converters have replaced traditional hard -switching converters. This thesis presents a novel zero-current-switching pulse-width-modulated buck converter for battery chargers to control resonant converters flexibly. An auxiliary switch is inserted into the resonant loop in the proposed novel battery charger to control the resonant time precisely. The developed charger has the advantages of the hard-switching converter and the resonant converter with constant -frequency control, reduced resonant time and the operation of all switching components in the charger under the zero-current-switching condition to reduce significantly switching losses. The developed charger circuit is highly suitable for high-frequency operation and high charging efficiency.
This thesis employs the pulse-width-modulated control mode for the switching of two active switches. The operation modes of the circuit and the equivalent circuits are constructed by analyzing the operating principles of the circuit, based on the turn-on conditions of the active switches. The equations used to determine the circuit parameters are derived from the equivalent circuits. Experimental results have demonstrated the theoretical effectiveness of the proposed novel battery charger circuit. A practical mean charging efficiency of over 90% is quite satisfactory.
中文摘要 i
英文摘要 ii
誌謝 iii
目錄 iv
圖目錄 vi
表目錄 ix
第一章 緒論 1
1.1研究動機 1
1.2研究背景與目的 3
1.3章節架構 7
第二章 降壓轉換器 8
2.1基本切換式轉換器 8
2.2降壓式轉換器 9
2.3降壓式轉換器動作原理 10
2.4降壓式轉換器理論之總結 18
第三章 降壓式零電流切換轉換器 22
3.1共振電路使用原由 22
3.1.1零電壓切換共振式轉換 23
3.1.2零電流切換共振式轉換 25
3.2降壓式零電流切換轉換器 27
3.3降壓式零電流切換轉換器之輸出電壓 36
3.4降壓式零電流切換轉換器之電壓增益正規化 39
第四章 新型零電流切換脈波寬度調變降壓式換蓄電池充電器 41
4.1新型充電器之電路分析 43
4.2新型充電器之輸出電壓 52
4.3新型充電器之電壓增益正規化 55
第五章 新型充電器設計 57
5.1充電器各元件之設計 57
5.1.1充電器之共振元件Lr、Cr之設計 57
5.1.2直流濾波元件設計 60
5.1.3元件選擇 62
第六章 模擬與實驗結果 66
6.1新型充電器之模擬與實測 66
6.2充電電壓、充電電流、效率變化曲線 76
第七章 結論與未來展望 79
7.1結論 79
7.2未來展望 79
參考文獻 81
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