Characterization of asymmetrical half bridge flyback converter

Author

Chen, Tso-Min ; Chen, Chern-Lin

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

2

fYear

2002

fDate

2002

Firstpage

921

Abstract

Flyback derived converters are attractive because of their simple capacitive output filter when compared with other converters used in multiple-output or cost-sensitive applications. This paper analyzes the detailed circuit behavior of the asymmetrical half bridge flyback converter. Several practical issues, including the specific relationships between the duty cycle and the different types of energy in the energy-storage elements, and the zero voltage switching (ZVS) conditions of the power switches have been thoroughly examined. Mathematical equations have also been given. A 5 V/20 A prototype has been built to verify the analytical results.

Keywords

bridge circuits; power convertors; switching circuits; 20 A; 400 V; 5 V; ZVS; asymmetrical half bridge flyback converter characterisation; capacitive output filter; circuit behavior; duty cycle; energy-storage elements; flyback derived converters; power switches; zero voltage switching; Bridge circuits; Equations; Inductors; Prototypes; Resonance; Stress; Switches; Switching converters; Switching loss; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2002. pesc 02. 2002 IEEE 33rd Annual

Print_ISBN

0-7803-7262-X

Type

conf

DOI

10.1109/PSEC.2002.1022572

Filename

1022572