Effects of switching frequency and leakage inductance on slow-scale stability in a voltage controlled flyback converter

The effects of both the switching frequency and the leakage inductance on the slow-scale stability in a voltage controlled flyback converter are investigated in this paper. Firstly, the system description and its mathematical model are presented. Then, the improved averaged model, which covers both...

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Bibliographic Details
Published inChinese physics B Vol. 22; no. 12; pp. 133 - 140
Main Author 王发强 马西奎
Format Journal Article
LanguageEnglish
Published 01.12.2013
Subjects
Converters
Electric potential
Hopf bifurcation
Hopf分岔
Inductance
Leakage
Mathematical models
Stability
Switching
Voltage
反激式
平均模型
开关频率
漏感
电压控制
稳定性
转换器
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Summary:The effects of both the switching frequency and the leakage inductance on the slow-scale stability in a voltage controlled flyback converter are investigated in this paper. Firstly, the system description and its mathematical model are presented. Then, the improved averaged model, which covers both the switching frequency and the leakage inductance, is established, and the effects of these two parameters on the slow-scale stability in the system are analyzed. It is found that the occurrence of Hopf bifurcation in the system is the main reason for losing its slow-scale stability and both the switching frequency and the leakage inductance have an important effect on this slow-scale stability. Finally, the effectiveness of the improved averaged model and that of the corresponding theoretical analysis are confirmed by the simulation results and the experimental results.
Bibliography:Wang Fa-Qiang, Ma Xi-Kui（State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi＇an Jiaotong University, Xi＇an 710049, China ）
The effects of both the switching frequency and the leakage inductance on the slow-scale stability in a voltage controlled flyback converter are investigated in this paper. Firstly, the system description and its mathematical model are presented. Then, the improved averaged model, which covers both the switching frequency and the leakage inductance, is established, and the effects of these two parameters on the slow-scale stability in the system are analyzed. It is found that the occurrence of Hopf bifurcation in the system is the main reason for losing its slow-scale stability and both the switching frequency and the leakage inductance have an important effect on this slow-scale stability. Finally, the effectiveness of the improved averaged model and that of the corresponding theoretical analysis are confirmed by the simulation results and the experimental results.
11-5639/O4
flyback converter slow-scale stability improved averaged model Hopf bifurcation
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/12/120504