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博碩士論文 etd-0815107-162259 詳細資訊
Title page for etd-0815107-162259
論文名稱
Title
順滑模態量化控制應用於三階降壓式電力轉換器
Sliding-Mode Quantized Control with Application to a Three-Level Buck Converter
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
103
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2007-07-26
繳交日期
Date of Submission
2007-08-15
關鍵字
Keywords
降壓式轉換器、順滑模態、量化控制、三階
buck converter, three-level, sliding mode, quantized control
統計
Statistics
本論文已被瀏覽 5662 次,被下載 5067
The thesis/dissertation has been browsed 5662 times, has been downloaded 5067 times.
中文摘要
所謂的量化控制是指系統的控制力被量化成幾個準位,這種控制容易利用開關去將電路實現出來,且開關消耗能量很低,故常被應用於日常生活上。本論文重點是在介紹順滑模態量化控制,利用動態順滑模態的原理,使順滑面會隨著頻率不同作改變,故此控制器可針對系統所在意的頻率範圍作權重調整。不過傳統順滑模態控制有一項很嚴重的缺點,就是量化器所輸出之階數只能為二,但為了減少量化系統在切換時所造成的不良影響,多階量化系統正廣泛被運用,一般的解決辦法是將系統中的比較器直接改為多階的量化器,可是此時系統並不一定操作在順滑模態,因此不容易去分析系統的穩定度;而在順滑模態量化控制中,則是利用另外一組訊號來決定最適合系統的多階量化器輸出準位,如此便可利用傳統的作法證明系統操作在順滑模態,有利於穩定度之分析。
本論文應用在直流對直流電力轉換器,提出有別於脈波寬度調變之控制器設計方法,此理論的優勢在於設計出來的電路不需要鋸齒波產生器和電流感測元件,且為了突顯順滑模態量化控制能應用在量化輸出為多階之系統的優點,故選擇使用三階降壓式電力轉換器來驗證這套理論的可行性。最後經由設計與實作,得到平均直流誤差為0.4625%,輸出電壓漣波為2.8988%,且當步階電流為3A,迴轉率6.25A/μs時,負載變動誤差為2.3%的12V/8V三階降壓式電力轉換器。
Abstract
A quantized control means that the control force is restricted to takes only a finite number of prescribed levels. The well-known bang-bang control or relay control belongs to this category. This kind of control has the advantage of simple circuit realization using electronic switches or relays that feature low power consumption in their on-off operation. However, quantized control introduces noise and distortion, and even worse its high nonlinearity makes the stabilizing compensator design difficult. This thesis applies the concept of dynamic sliding mode to the synthesis of a multi-level quantized control, with the aim to stabilize the system, perform reference tracking and attenuate the switching noise.
The applicability of the presented sliding-mode quantized control is demonstrated on a three-level buck converter. Compared with the conventional PWM (Pulse-Width Modulation) scheme, it eliminates the use of a complex three-level PWM generator and a current sensor. A 12V/8V three-level buck converter with sliding mode quantized control is designed and realized, which shows the output voltage with 0.4625% of average DC error, 2.8988% of the static output ripple and 2.3% of load regulation error in response to the load current steps from 0A/3A to 3A/0A, at a slew rate of 6.25A/μsec.
目次 Table of Contents
第一章 緒論 1
1.1 研究背景 1
1.2 研究動機及目的 5
1.3 章節內容 11
第二章 三階降壓式電力轉換器的架構及分析 12
2.1 切換式電力轉換器概論 12
2.2 三階降壓式電力轉換器 23
2.2.1 多階式電力轉換器介紹 23
2.2.2 三階降壓式電力轉換器介紹 24
2.3 受控場之分析 29
2.4 控制器之設計目標 34
第三章 順滑模態量化控制 36
3.1 順滑模態控制理論 36
3.2 順滑模態量化控制理論 40
3.2.1 量化控制 40
3.2.2 動態順滑模態控制 42
3.2.3 順滑模態量化控制的迫近模態 43
3.2.4 順滑模態量化控制的順滑模態 46
3.2.5 權重函數的選取 48
3.3 三階降壓式電力轉換器之控制器設計 49
第四章 範例設計及模擬 55
4.1 順滑模態量化控制應用於三階降壓式轉換器 55
4.1.1 k1改變對整體系統的影響 56
4.1.2 k2改變對整體系統的影響 58
4.1.3 k3改變對整體系統的影響 59
4.1.4 整體系統最佳控制參數模擬 61
4.2 順滑模態控制應用於二階降壓式轉換器 64
4.3 動態順滑模態控制應用於二階降壓式轉換器 66
4.4 各種降壓式轉換器之比較 68
第五章 硬體電路設計與實驗結果 70
5.1 硬體電路設計 70
5.2 實驗結果 77
第六章 結論及未來研究方向 85
參考文獻 88
參考文獻 References
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