Soft switching forward-flyback converter with one magnetic component and current doubler rectification circuit

Author

Fröhleke, N. ; Richter, J. ; Wallmeier, P. ; Grotstollen, H.

Author_Institution

Dept. of Electr. Eng., Paderborn Univ., Germany

Volume

2

fYear

1996

fDate

6-10 Oct 1996

Firstpage

1161

Abstract

An active clamped forward-flyback converter comprising a current doubler scheme, which boosts the application range of MOSFETs for efficient rectification in low-voltage power supplies, is investigated first approximately and second including commutations. Design equations and issues are given for the magnetic integration of filter inductors on the outer core legs of the transformer. The circuit allows soft switching in the relevant operation range, while keeping the reactive power low. Thus, the resulting efficiency of nearly 90% using Schottky diodes is increased compared to hard switching or resonant topologies

Keywords

MOSFET; Schottky diodes; commutation; field effect transistor switches; filters; inductors; power convertors; power supplies to apparatus; rectification; rectifying circuits; switching circuits; transformer cores; 90 percent; MOSFET; Schottky diodes; commutation; current doubler rectification circuit; filter inductors; low-voltage power supplies; magnetic component; magnetic integration; outer core legs; soft switching forward-flyback converter; transformer core; Equations; Filters; Inductors; MOSFETs; Magnetic resonance; Magnetic separation; Magnetic switching; Power supplies; Switching converters; Transformer cores;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1996. Thirty-First IAS Annual Meeting, IAS '96., Conference Record of the 1996 IEEE

Conference_Location

San Diego, CA

ISSN

0197-2618

Print_ISBN

0-7803-3544-9

Type

conf

DOI

10.1109/IAS.1996.560225

Filename

560225