低電流漣波之非對稱推挽式電能轉換器｜國立臺灣科技大學博碩士論文系統

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研究生：	陳奕錚 Yi-cheng Chen
論文名稱：	低電流漣波之非對稱推挽式電能轉換器 Asymmetrical Push-Pull Converters with Current Ripple Cancellation
指導教授：	呂錦山 Ching-Shan Leu
口試委員:	邱煌仁 Huang-Jen Chiu 楊宗銘 Chung-Ming Young
學位類別：	碩士 Master
系所名稱：	電資學院 - 電機工程系 Department of Electrical Engineering
論文出版年：	2014
畢業學年度：	102
語文別：	英文
論文頁數：	68
中文關鍵詞：	非對稱推挽式電能轉換器、電流漣波消除機制、零電壓開關切換、台科全波整流器
外文關鍵詞：	asymmetrical push-pull converter, current ripple reduction mechanism, zero voltage switching (ZVS), Taiwan-Tech rectifier
相關次數：	點閱：263 下載：12
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具有電流漣波消除之非對稱推挽式電能轉換器（APPRC）可實現電流漣波消除的機制，除了提供電路所需的電壓增益，其降低輸入電流漣波大小和具備零電壓切換等功能，可減少電路之電磁干擾強度和開關切換產生的損耗，因此電路中之輸入濾波器的體積可最小化，開關切換損耗也得以減少。另外在輸出整流側加入台科全波整流器（TFR），植基於整流電路中的濾波器可有效地降低輸出電流漣波的大小，藉由這項優點使得輸出濾波器之濾波電容可以在選擇上採用低成本與小體積的元件又可以符合輸出電壓漣波值的規範。
這些特點讓此電路成為高頻率，高效率的電能轉換器應用的首選之一，本篇論文對電路進行電路設計，理論分析與操作原理，最後加以實現於輸入電壓範圍300-400V和輸出24V/10A之規格，並將電路實驗結果與理論分析作驗證。

Asymmetrical push-pull converter with current ripple cancellation (APPRC) is presented to realize current ripple mechanism. In addition to obtaining required voltage gain, it has reduced input current ripple and zero voltage switching resulting in reducing EMI intensity and switching loss, respectively. Consequently, the volume of input filter and the switching loss can be minimized significantly.
Moreover, the output current ripple can be reduced because of Taiwan-Tech full-wave rectifier (TFR) built-in output ripple-current reduction mechanism. As a result, a smaller number output capacitance can be used due to reduce the output current ripple.
These properties make it desirable for high frequency, high efficiency power conversion applications. To demonstrate its feasibility, the circuit analysis, operational principle and the experimental results of the proposed converters with 300-400V input and 24V/10A output are built and verified in this thesis.

III

Table of Contents
Abstract .......................................................................................................................... I
Acknowledgement ........................................................................................................ II
Table of Contents ......................................................................................................... III
List of Figures ............................................................................................................... V
List of Tables ............................................................................................................. VIII
Chapter 1     Introduction ................................................................................................ 1
1.1   Background and motivation ........................................................................... 1
1.2   Objectives of the Thesis ................................................................................. 3
1.3   Organization of the Thesis ............................................................................. 3
Chapter 2     Input  Current  Ripple  Cancellation  Asymmetrical  Push–Pull  Converter
with Center tapped rectifier ................................................................................... 5
2.1   Introduction .................................................................................................... 5
2.2   Operation principle ........................................................................................ 8
2.3   Circuit analysis............................................................................................. 12
2.3.1         Voltage gain ................................................................................. 12
2.3.2         Voltage stress ............................................................................... 13
2.3.3         Transformer dc-bias current ......................................................... 13
2.3.4         ZVS condition .............................................................................. 14
2.3.5         Input current cancellation ............................................................ 16
2.4   Circuit design ............................................................................................... 18
2.4.1         Transformer (TR) ......................................................................... 18
2.4.2         Output inductor (Lo) .................................................................... 22
2.4.3         Output capacitor (Co) .................................................................. 23
IV

2.4.4         Clamping capacitors (C1, C2, and C C1 ) ....................................... 23
2.4.5         Power switches of circuit (Q1 and Q2) ........................................ 24
2.5   Experimental results..................................................................................... 25
2.6   Summary ...................................................................................................... 29
Chapter 3         Input Current Ripple Cancellation Asymmetrical Push-Pull Converter
with Taiwan-Tech Full-Wave Rectifier ................................................................ 31
3.1   Introduction .................................................................................................. 31
3.2   Operation principle ...................................................................................... 33
3.3   Circuit Analysis ............................................................................................ 37
3.3.1         ZCS condition .............................................................................. 37
3.3.2         Output current ripple reduction .................................................... 38
3.4   Circuit Design .............................................................................................. 39
3.4.1         Clamping capacitors (C C2 ) ........................................................... 40
3.4.2         Output capacitor (Co) .................................................................. 41
3.5   Experimental Results ................................................................................... 41
3.6   Summary ...................................................................................................... 47
Chapter 4     Conclusions and Future Researches......................................................... 49
4.1   Conclusions .................................................................................................. 49
4.2   Future Researches ........................................................................................ 51
References .................................................................................................................... 52
Appendix ...................................................................................................................... 55

                                

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