Unified Extended-Frequency Model of Buck Converters Under Different Carriers

被引：4
作者：
Jiang, Ying [1 ,2 ]
Sun, Yao [1 ,2 ]
Lin, Jianheng [1 ,2 ]
Xie, Shiming [1 ,2 ]
Su, Mei [1 ,2 ]
Liu, Yonglu [1 ,2 ]
机构：
[1] Cent South Univ, Sch Automat, Changsha 410083, Peoples R China
[2] Cent South Univ, Hunan Prov Key Lab Power Elect Equipment & Grid, Changsha 410083, Peoples R China
来源：
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2023年 / 70卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Buck converter; modulation mode; sideband effect; stability analysis; SMALL-SIGNAL MODEL; DESIGN CONSIDERATIONS; OUTPUT IMPEDANCE; DOMAIN ANALYSIS; LOOP GAIN;
D O I：
10.1109/TIE.2022.3179561
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
From the perspective of the conventional average modeling, a power converter under different modulation modes have the same model. In this article, a unified extended-frequency model for the buck converter working in continuous conduction mode under the general triangular carrier is built, which considers all the sideband effects. Based on the extended-frequency model, more details of the buck converter can be seen and some differences in the dynamic behavior under different modulation modes are revealed, which breaks the traditional cognition. Furthermore, taking leading-edge, trailing-edge, and symmetric pulsewidth modulators as examples, the resulting stability margin differences due to the modulation mode are analyzed, providing guidance for selecting an appropriate modulation mode for a given application. Finally, the experiments are conducted to verify the effectiveness of the proposed model.
引用
收藏
页码：4108 / 4119
页数：12
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