Abstract
Nowadays, electricity along with power electronics have become essential part of our life. Power consumptions are increasing every year due to industrialization in our country. DC-DC converter topologies such as buck, boost, buck-boost, cuk converters provide us with ability to step up and step down the input DC voltage precisely. DC-DC converter is needed to convert directly to the desired voltage from the renewable energy sources such as solar cell and Fuel cell. In this paper, we proposed four input buck-boost DC-DC converter which is used in such system to improve efficiency, performance and also to reduce cost and component count. Four input buck-boost dc-dc converter is designed through derivation by using five Single pole Single Throw (SPST) switches as a building block. Switch realization and operating characteristics of proposed four input buck-boost dc-dc converter is obtained with their voltage transfer ratios in buck and boost modes of operation. The performances of the dc-dc converter are simulated using MATLAB/simulink.
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