研究生: |
陳威儒 Wei-Ju Chen |
---|---|
論文名稱: |
以FPGA設計與實現一個基於DPWM的降壓型轉換器 The Design and Implementation of an FPGA Buck Converter Based on DPWM |
指導教授: |
林銘波
Ming-Bo Lin |
口試委員: |
鍾勇輝
Yung-Hui Chung 陳少華 Shao-Hua Chen |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2017 |
畢業學年度: | 105 |
語文別: | 中文 |
論文頁數: | 75 |
中文關鍵詞: | 降壓型直流電源轉換器 、現場可程式化閘陣列 、數位脈波寬度調變器 、數位控制 |
外文關鍵詞: | BUCK DC-DC converter, FPGA, DPWM, digital control |
相關次數: | 點閱:849 下載:17 |
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近年來大量的消費型電子產品與半導體技術不斷的快速演進,交換式電源供應器也因應電子技術的需求,朝向高效率、高密度、高頻化的發展。數位交換式電源供應器不需要額外的補償元件,並且具備了靈活性(flexibility)與可調性(adjustability)的優勢,並且在數位控制上更容易實現進階的控制方法,可以使暫態響應更快速更穩定。
本論文以Xilinx公司所推出的 Virtex 5 系列FPGA (XC5VLX110T)為核心,實現了一個數位高頻降壓型轉換器。當輸入4 V ~ 6 V時,輸出電壓為1.8 V,輸出電流為1 A,操作於連續導通模式,並使用了電壓回授控制。提出的轉換器以延遲環型架構為主,在1 MHz的低系統時脈需求下,以較少的資源,實現了1 MHz切換頻率、9位元解析度的數位脈波調變器。在實現上使用手動佈局的方法增加精確性。設計完成的轉換器,經由FPGA實際量測的結果顯示:輸出電壓沒有發生極限環震盪,並在不同的輸入電壓下,皆穩定輸出於1.8 V,且正確輸出相對應的脈波寬度。於電子負載250 mA ~ 1 A的測試下,超越量約為90 mV,並大約能於20 μs穩定輸出電壓。
With the rapid evolution of consumer electronics and semiconductor technology in recent years, the design of switching power supplies is also tended to high-density, high-efficiency, and high-frequency. By implementing the controller of the switching power supply in a digital way, the resulting switching power supply not only can be implemented without external compensation circuits, but also has the advantages of flexibility and adjustability. In addition, with the digital controller, it makes easier to apply the advanced control technique, and the resulting converter has a faster transient response and is more stable.
The digital high-frequency buck converter designed is verified with a Xilinx Virtex5 series FPGA (XC5VLX110T) device. To make the DPWM more accurate, the DPWM is designed and implemented by the delay-ring architecture with a meticulously manual place & route. It results in a 9-bit resolution and operates at 1-MHz system clock frequency. The verification results of the FPGA device are: The output voltage recovers in 20 μs with a 90-mV voltage drop when the dynamic load rises from 250 mA to 1000 mA; the output voltage is stable at 1.8 V as the input voltage changes from 4 V to 6 V.
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