Title :
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
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;
Conference_Titel :
Industry Applications Conference, 1996. Thirty-First IAS Annual Meeting, IAS '96., Conference Record of the 1996 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-3544-9
DOI :
10.1109/IAS.1996.560225
