應用無ADC之全數位化控制於具主動箝位電路之升壓型轉換器

於本論文中，提出一個結合主動箝位（有源箝位）電路之升壓型轉換器。所提之架構較傳統升壓型轉換器只加入一輔助功率開關，一電感及一電容等少量輔助元件，但卻能使得兩功率開關在零電壓時導通且輸出二極體也能在零電流時截止，因此能提高轉換器整體之效率。除此之外，亦同時加入自動調變技術（自動調諧）以調控輔助功率開關截止的時間點以進一步提升效率。就控制方面而言，為了實現全數位化控制，本論文系以場效可規劃邏輯閘陣列（現場可編程門陣列， FPGA）的做為系統控制核心。除此之外，由於一顆高性能的類比數位轉換器（模擬到數字轉換器， ADC）的價格昂貴，因此本論文採用無取樣方法對輸出電壓及輸入電流進行取樣。最後，藉由理論分析，推導，模擬及實驗波形來驗證所提架構之可行性及有效性。

關鍵字

主動箝位；自動調變；升壓型轉換器； FPGA ；無ADC取樣

並列摘要

In this thesis, an active clamp circuit applied to the boost converter is presented, which is implemented only by one auxiliary switch, one inductor and one capacitor as compared to the traditional boost converter. In this topology, the main and auxiliary switches both are turned on with zero voltage switching (ZVS) and the output diode is turned off with zero current switching (ZCS), thereby causing the efficiency of the converter to be improved. Aside from this, the auto-tuning technique based on a given look-up table is added to adjust the turn-off instant of the auxiliary switch, so as to enhance the efficiency further. As for the system control, a field programmable gate array (FPGA) is used as a control kernel to fulfill fully-digitalized control. Moreover, since the high-performance analog-to-digital converter (ADC) is costly, and hence the one-comparator sampling technique without any ADC is utilized herein to obtain information on the output voltage and input current of the converter. Finally, via theoretical analysis, mathematical deduction, and some simulated and experimental results, the feasibility and effectiveness of the proposed topology are verified.

並列關鍵字

Active Clamp ； Auto-Tuning ； Boost Converter ； FPGA ； Sampling Without ADC

參考文獻

[67]賈證主，VHDL數位系統設計與應用，台北，台科大圖書股份有限公司， 2004。

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國際替代計量

應用無ADC之全數位化控制於具主動箝位電路之升壓型轉換器

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