陳德玉臺灣大學：電機工程學研究所莊湘微Chuang, Shiang-WeiShiang-WeiChuang2007-11-262018-07-062007-11-262018-07-062007http://ntur.lib.ntu.edu.tw//handle/246246/53455控制迴授增益在設計電源轉換器的迴授電路時是非常重要的考量，它不僅影響了電路迴授的穩定性，還與控制的效能相關。脈波寬度調變增益（Pulse Width Modulation Gain）是轉換器控制迴授中的一項因素，過去都是在忽略切換頻率漣波的情況下推導調變增益（modulation gain）。 在這篇論文中，將分析推導出與漣波效應相關新的調變增益方程式，以及使用電腦模擬漣波效應對調變增益的影響，再用SIMPLIS軟體模擬電路並將其結果與推導方程式所得的調變增益交叉檢驗，最後在結論對兩著不同之處做說明。　Control loop gain is a very important consideration in the design of a power converter feedback circuit. It affects not only the circuit feedback stability but also the control performances. One of the factors of the converter control loop gain is the pulse-width modulator gain. In the past, this factor has been derived from an assumption that the switching frequency ripple is negligible. Reasonable accuracy has been obtained under this assumption. In this thesis, the ripple effect on the modulator gain was studied using analytical derivation and computer simulations. A new equation of the modulator gain was obtained. Simulation results using SIMPLIS package were used to cross check the theoretical derivation. Discrepancies from the two results were investigated and conclusions drawn.口試委員會審定書…………………………………………………………………….i 誌謝……………………………………………………………………………………ii 中文摘要………………………………………………….…………………………..iii 英文摘要……………………………………………………………….……………..iv 目錄……………………………………………………………………………………v 圖目錄………………………………………………………………………………..vii 表目錄………………………………………………………………….……………..ix 符號表…………………………………………………………………………………x 第一章 緒論…………………………………………………………………………..1 1.1 直流轉換器的回授簡介……………………………...……………………..1 1.2 研究目的…………………………………………………………...………..5 1.3 本論文結構………………………………………………….………………5 第二章 漣波效應對調變增益（Modulator Gain）之影響…………….……………..6 2.1 不考量漣波效應時調變增益的推導……………………….………………6 2.2 漣波效應對調變增益的推導……………………………………………….9 第三章 用SIMPLIS檢驗Fm………………………………………………………17 3.1 模擬軟體的介紹…………...………………………………………………17 3.1.1 SIMPLIS簡介………………………………………….…………….17 3.1.2 SIMPLIS與PSPICE的差別…………………………….…………...17 3.2 開路調變增益的模擬驗證………………………………….……………..20 3.3 閉路調變增益的模擬驗證………………………………………………...24 3.3.1 單一電路狀態的模擬步驟………………………………………….24 3.3.2 改變Sr對調變增益的影響 case 1（使用type III 補償器）….…….29 3.3.3 case 1結果比較……………………………………………………...32 3.3.4 改變Sr對調變增益的影響 case 1（使用type III 補償器）………..35 3.3.5 case 2結果比較……………………………………………………...39 3.4 計算與模擬調變增益不相同之原因推測與說明………….…………….41 3.4.1 計算與模擬調變增益不準確之原因推測………………………….41 3.4.2 探討方法說明……………………………………………………….41 3.4.3 結果討論…………………………………………………………….45 第四章 結論與未來發展……………………………………………………………46 4.1 結論………………………………………………………………………...46 4.2 未來發展…………………………………………………………………...47 參考文獻…………………………...…………………………….…………………..48 作者簡歷……………………………………………………………………………..50en-US調變增益迴授增益漣波效應電源轉換器modulator gainloop gainripple effectpower converterthesis