A novel buck/boost/buck-boost three-input DC/DC converter

In hybrid renewable power systems, the use of a multiple-input dc/dc converter (MIC) leads to simpler circuit and lower cost, compared to the conventional use of several single-input converters. This paper proposed a novel three-input buck/boost/buck-boost converter, which can be applied in all kinds of input voltage application. All the power sources in this converter can deliver power to the load either simultaneously or individually in one switching period. In addition, the steady relationship and power management strategy of this converter have been derived. Finally, three generating method of a multiple-input buck/boost/ buck-boost converter are given, and this method can be extended to the other multiple-input dc/dc converter.