降壓型DC/DC轉換器之數位控制設計與分析

Design and Analysis of Digital Control for Buck DC/DC Converters

何俊賢(Chun-Hsien Ho)

指導教授 ： 劉志文

國立臺灣大學/電機資訊學院/電機工程學研究所/碩士(2006年)

https://doi.org/10.6342/NTU.2006.00518

摘要

本論文欲探討數位化的控制器應用於單相直流-直流降壓型轉換器，及在設計數位化控制器時所需要考量的問題。
目前數位控制器的主要架構可分成三個部分，即類比-數位轉換器(A/D converter)、數位比例-積分-微分補償器 (PID compensator)、及數位脈波寬度調變(DPWM)。
本文依降壓型直流-直流轉換器之規格，輸入電壓5~12V，輸出電壓2V且電壓變動範圍在200mV的條件下，觀察其負載電流在迴轉率(slew rate)為2.5A/μs由2A變化至2.5A時之補償特性。並實作出數位化控制器，採用數位信號處理器(DSP)來進行數位式控制，文中將推導出直流-直流降壓型轉換器小訊號模型，並分析系統之穩定度，進而設計出適當的補償器，以確保系統之穩定。

關鍵字

數位控制器 ； 降壓型直流-直流轉換器

並列摘要

The thesis focuses on the feasibility of realizing a digital controller for a DC-DC switching Buck converter, and discusses what should be taken into account while designing such a controller and the problems that may be encountered.
The prevalent primary structure of a digital controller consists of three block, A/D converter, digital PID compensator, and the DPWM(Digital Pulse-Width-Modulated).
In the thesis one Buck converter hardware with a variable input voltage range 5~12V, output voltage 2V, output current varied from 2A to 2.5A had been carried out and one digital compensator written in assembly had been tested to observe if which could live up to the expectation.

並列關鍵字

ditital controller ； buck converter

參考文獻

[14]Matlab系列叢書，”視覺化建模環境”，鈦思科技股份有限公司編著。

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