電源轉換器之漣波效應對於調變增益之研究

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。

關鍵字

調變增益；迴授增益；漣波效應；電源轉換器

並列摘要

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.

並列關鍵字

modulator gain ； loop gain ； ripple effect ； power converter

參考文獻

[1] 王珽弘,“電流型態直流－直流電壓轉換器之控制特性模擬,”國立台灣大學電機工程學研究所碩士論文, 民國九十五年六月.

[5] R.B. Ridley, Bo H. Cho, and Fred C.Y. Lee, “Analysis and Interpretation of Loop Gains of Multiloop-Controlled Switching Regulators,” IEEE Transactions on Power Electronics. Vol. 3, No, 4, October. 1988.

Modeling of Average Current-Mode Control,” IEEE Transactions on Power Electronics. Vol. 8, No. 2, April. 1993.

[7] R.B.　Ridley, “A New Small-Signal Model for Current-Mode Control,” Ph.D. Dissertation, Virginia Polytechnic Institute and State University, November 1990.

[12] Vatche Voperian, “Simplified Analysis of PWM Converters Using Model of PWM Switch,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 26, Issue 3, May 1990.

國際替代計量

電源轉換器之漣波效應對於調變增益之研究

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