A copper-loss based design method and verification for a zero-ripple interface for PV/Battery-to-grid applications

Abstract

A systematic design of a zero-ripple Ćuk converter for PV/Battery-to-grid dc-dc conversion is presented. This paper derives the copper loss geometrical constant (Kg) for this kind of integrated magnetic core using a simplified yet intuitive flux-reluctance model. Unlike earlier designs, the design procedure is completely analytical and valid for a range of duty-ratio operation. Verification is done by finite element methods and circuit simulations.