Abstract

The output regulation of DC-DC converters is a challenging problem due to the fast switching behavior in the presence of the uncertainty/variation in the model, input, and load. In this paper, the Zeta converter is first analyzed and then using the Linear Matrix Inequality (LMI) theory a robust controller is designed to cope with this issue. Inspired by the photovoltaic applications of the Zeta converter, and due to the nature of the solar cells, not only the load variations but also the input voltage variations are considered in the controller design. Finally, the proposed controller is implemented in a DSP-based controller and its performance is experimentally verified and compared with the widely used PI controller.