Full-Bridge Power DC-DC transformation by MOSFET Switching Techniques

Abstract

This paper presents a collection of novel soft-switching techniques to extend the ability conversion potency in PV cell (PVC) systems employing a full-bridge topology. For this causes, a special right- arranged modulation sequence is developed to attenuate conductivity losses whereas maintaining soft-switching characteristics within the MOSFETs. Ancient auxiliary parts within the primary, like series inductors that square measure impractical for realizing because of the intense input current, square measure avoided and mirrored to the output resp- onse of the converter to attenuate current and generate soft transitions within the output diodes are replaced by MOSFET. By that result, the projected tech-niques with success scale back conductivity losses, minimize reverse-recovery losses within the output rectifiers, minimize transformer ringing, and guarantee low stress altogether the switches. The high potency is maintained within the entire vary of loading conditions, whereas taking into thought exceptional challenges related to PVC power conversion: input current, low voltage and poor regulation, and big selection of loading conditions. A close techniques for potency gains square measure bestowed and A phase-shift zero-voltage shift topology is used as a reference topology to focus on the mechanisms for performance improvement and therefore the blessings within the use of the special modulation. Experimental results of a power convertor square measure bestowed to validate the potency gains, illustrate the advantages of the special modulation, and demonstrate the soft-switching transitions.