Forward-flyback resonant converter for high-efficient medium-power photovoltaic applications

In this paper, a quasi-resonant forward-flyback converter is proposed for photovoltaic power system. Since the output of forward-flyback converter is connected in series, the proposed circuit offers high-step up conversion. The quasi-resonant forward circuit that consists of a transformer leakage in...

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Bibliographic Details
Published in2017 IEEE Applied Power Electronics Conference and Exposition (APEC) pp. 1223 - 1228
Main Authors Montes, Oscar Andres, Sungho Son, Sooa Kim, Hwasoo Seok, Lee, Jin S., Minsung Kim
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2017
Subjects
Capacitors
forward-flyback
high-efficiency
Inductance
Load modeling
Magnetic resonance
Magnetomechanical effects
medium power capacity
photovoltaic power applications
resonant
Switches
Switching circuits
zero current switching
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Summary:In this paper, a quasi-resonant forward-flyback converter is proposed for photovoltaic power system. Since the output of forward-flyback converter is connected in series, the proposed circuit offers high-step up conversion. The quasi-resonant forward circuit that consists of a transformer leakage inductance and a resonant capacitor generates almost sinusoidal currents during the switch on-time so the primary switching stress has been significantly reduced. The flyback circuit transfers the energy stored in the magnetizing inductance to the load during the switch off-time. Design guidelines of the circuit parameters are presented. To verify the proposed circuit design, a 400-W experimental prototype has been designed, fabricated, and tested. Simulation and experimental results verify the effectiveness of the proposed circuit design.
ISSN:2470-6647
DOI:10.1109/APEC.2017.7930851