Resonant Capacitor Voltage Feedback of Single-Input Multi-Output Flyback Converter

被引：0
|
作者：
Wang W. [1 ,2 ]
Lu D. [1 ,2 ]
Lin Q. [1 ,2 ]
Cai F. [1 ,2 ]
机构：
[1] College of Electrical Engineering and Automation, Fuzhou University, Fuzhou
[2] Fuzhou University-Kehua Hengsheng Power Electronics Technology Research Center, Fuzhou
来源：
Wang, Wu (wangwu@fzu.edu.cn) | 1600年 / China Machine Press卷 / 32期
关键词：
DC-DC; Resonance network; Ripple compensated constant on time; Single-input multi-output;
D O I：
10.19595/j.cnki.1000-6753.tces.160010
中图分类号：
学科分类号：
摘要：
A resonant capacitor voltage feedback control method for an asymmetrical half-bridge flyback converter is proposed in this paper. It can reduce the number of devices, save the costs and improve the efficiency in low power supply applications. By using this control method, the control structure of the isolated single-input multi-output converter is simplified. Moreover, there is no compensating circuit for the designed constant on-time controller. Since the feedback voltage signal for the control strategy is taken from the primary side resonant capacitor, it has large voltage ripple resulting in the pulse bursting phenomenon of constant on-time control, which makes the converter unstable. To restrain the pulse bursting phenomenon caused by the large voltage ripple, the constant on-time control with ripple compensation is used to suppress the feedback signal voltage ripple. Thus, the stability of the converter is guaranteed. Finally, the experimental prototype has verified the theoretical analysis and designing method. © 2017, The editorial office of Transaction of China Electrotechnical Society. All right reserved.
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页码：96 / 105
页数：9
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