Two control strategies for a novel D-square DC/DC converter for green electronics applications

Solar and fuel cells are widely used, as renewable electrical power source need transformer-less DC/DC coupling converters. One of the promising types of DC/DC converters is the D-square DC/DC converter that extends significantly the conversion range in comparison with a classical DC/DC converter. Two control strategies: the traditional modulation and the sliding-mode control, for a novel D-square DC/DC converter are presented. They make it possible to increase the range of the controlled value of the load current. The control design is based on using features of the switching nature of the converter. The existence condition of the limit cycles that is used for modulation control design and one of the sliding mode based on the method of the equivalent control are preconceived. The validation of the suggested control strategies is tested by some discussed experimental results.