Contribution to the analysis and design of the Cuk converter for the transfer of photovoltaic solar energy to batteries

This paper presents a DC-DC Cúk converter for transferring photovoltaic energy to batteries. The Cúk converter has the characteristic of having an inductor at the input and an inductor at the output, this allows reducing the ripple current at both the input and the output. This feature is desirable in systems that transfer the electrical energy of the photovoltaic modules to the batteries in order to reduce the ripple current. This article presents the analysis and design of the Cuk converter using a methodology based on switching functions. Likewise, the MPPT algorithm of disturbing and observing is applied. The methodology includes a way of sizing passive elements based on the ripple factor and the power of the photovoltaic module. The simulation and experimental results validate the analysis and design presented.