Analysis of fly-buck converter with emphasis on its cross-regulation

作者：Wang, Wu^*; Lu, Dexiang; Chai, Qinqin; Lin, Qiongbin; Cai, Fenghuang

来源：IET Power Electronics, 2017, 10(3): 292-301.

DOI：10.1049/iet-pel.2016.0272

• power convertors
• transfer functions
• fly-buck converter analysis
• cross-regulation
• single-input multioutput converters
• analytical model
• dual-outputs
• small-signal AC model
• cross-influence transfer functions
• load regulation coefficient
• load magnitude
• load change
• double control variables

Cross-regulation is one of the critical challenges in single-input and multi-output converters. In this study, new design guidelines and an analytical model for studying the cross-regulation between the dual-outputs of the fly-buck converter are proposed. A small-signal AC model is first established to obtain control over the output and to determine the cross-influence transfer functions of the system. Then, a load regulation coefficient and method for analysing the cross-regulation while considering the load magnitude and load change are proposed to study the characteristics of the fly-buck converter. Finally, to demonstrate the rationality behind the influencing factors over cross-regulation based on the resulting characteristics, a fly-buck converter with double control variables and lower cross-regulation is designed. Simulations and experimental prototypes are implemented to demonstrate the effectiveness of the proposed theoretical analysis.

• 出版日期2017-3-10
• 单位福州大学