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研究生:邱榮貴
研究生(外文):Jung-kuei Chiu
論文名稱:零電壓切換之直流電源供應器製作
論文名稱(外文):Implementation of a ZVS switching mode power supply
指導教授:林伯仁
指導教授(外文):Bor-ren Lin
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:電機工程系碩士班
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:68
中文關鍵詞:主動箝位技術零電壓切換
外文關鍵詞:ZVSactive clamp technique
相關次數:
  • 被引用被引用:6
  • 點閱點閱:194
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  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
本篇論文主要討論以順向式轉換器為基本架構具零電壓切換功能之直流電源供應器研製。順向式轉換器是目前使用主動箝位技術最普遍的電路架構之一,利用主動箝位技術來取代傳統順向式轉換器洩磁線圈繞組及RCD被動箝位電路,具有降低主功率開關電壓應力、實現零電壓切換、降低電磁干擾(EMI)及責任週期超過50%等優點。
本文將探討主動箝位順向式轉換器之基本動作原理,並介紹升壓式與升降壓式主動箝位技術。最後實際設計製作二次側中間抽頭主動箝位順向式轉換器,交流輸入電壓90伏特至135伏特、直流輸出5伏特╱20安培之零電壓切換直流電源供應器。
The objective of this thesis is to design and implement a ZVS switching mode power supply based on forward converter topology. The active clamp forward converter is one of the most popular converters using the active clamp technique. To compare with the transformer reset winding and passive RCD clamp circuit applied in conventional forward converter, the advantages of active clamp technique are including: lower voltage stress on the main power switch, the ability to switch at zero voltage, reduced EMI and duty cycle operation above 50%.

The basic operation principle of the active clamp forward converter is described in this thesis, then the boost and buck-boost active clamp techniques are also introduced. Finally the implementation of a ZVS switching mode power supply base on active clamp forward converter with center-tapped topology is carried out, and the specifications of the prototype circuit are: input voltage 90∼135Vrms, output voltage VO=5V and rated output current IO=20A.
中文摘要 --------------------------------------------------------------------------- i
英文摘要 --------------------------------------------------------------------------- ii
誌謝 --------------------------------------------------------------------------- iii
目錄 --------------------------------------------------------------------------- iv
表目錄 --------------------------------------------------------------------------- vi
圖目錄 --------------------------------------------------------------------------- vii
一、 導論--------------------------------------------------------------------- 1
1.1 前言-------------------------------------------------------------------- 1
1.2 論文架構--------------------------------------------------------------- 3
二、 順向式轉換器--------------------------------------------------------- 3
2.1 基本型順向式轉換器------------------------------------------------ 4
2.2 具箝位功能之順向式轉器------------------------------------------ 8
2.2.2 硬式切換--------------------------------------------------------------- 9
2.2.2 緩衝電路--------------------------------------------------------------- 9
2.2.3 RCD箝位順向式轉換器---------------------------------------------- 9
三、 主動箝位順向式轉換器--------------------------------------------- 16
3.1 主電路架構說明------------------------------------------------------ 16
3.2 電路動作分析--------------------------------------------------------- 16
3.2.1 階段一 t0∼t1---------------------------------------------------------- 16
3.2.2 階段二 t1∼t2---------------------------------------------------------- 17
3.2.3 階段三 t2∼t3---------------------------------------------------------- 19
3.2.4 階段四 t3∼t4---------------------------------------------------------- 20
3.2.5 階段五 t4∼t5---------------------------------------------------------- 22
3.2.6 階段六 t5∼t6---------------------------------------------------------- 23
3.2.7 階段七 t6∼t7---------------------------------------------------------- 24
3.2.8 階段八 t7∼t8---------------------------------------------------------- 25
3.2.9 階段九 t8∼t9---------------------------------------------------------- 26
3.2.10 階段十 t9∼t0---------------------------------------------------------- 28
3.3 主動箝位順向式轉換器主要優點--------------------------------- 29
3.4 主要波形--------------------------------------------------------------- 30
四、 主動箝位順向式轉換器架構設計--------------------------------- 31
4.1 一次側主動箝位技術架構選用------------------------------------ 31
4.1.1 升壓式主動箝位技術說明------------------------------------------ 31
4.1.2 升壓式主動箝位輔助開關驅動設計------------------------------ 33
4.1.3 返馳式主動箝位技術說明------------------------------------------ 35
4.1.4 返馳式主動箝位輔助開關驅動設計------------------------------ 36
4.1.5 升壓式與返馳式主動箝位比較結果------------------------------ 37
4.2 二次側整流濾波架構選用------------------------------------------ 39
4.2.1 半波整流電路--------------------------------------------------------- 39
4.2.2 中間抽頭全波整流電路--------------------------------------------- 39
4.2.3 倍流式整流電路------------------------------------------------------ 40
4.3 電流模式控制電路--------------------------------------------------- 42
4.3.1 電流感測電阻方式--------------------------------------------------- 42
4.3.2 電流感測變壓器方式----------------------------------------------- 43
五、 實作電路架構及波形------------------------------------------------ 45
5.1 實作電路架構及參數------------------------------------------------ 45
5.2 實驗波形--------------------------------------------------------------- 46
5.3 實驗數據--------------------------------------------------------------- 63
六、 結論--------------------------------------------------------------------- 64
參考文獻 -------------------------------------------------------------------------- 65
自傳 -------------------------------------------------------------------------- 67
附錄A 硬體電路實體照片-------------------------------------------------- 68
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