In order to protect the natural environment of the Earth, the development of clean energy without pollution is considered in the last decade. Clean energies such as fuel cell, photovoltaic, wind energy and so on have been rapidly promoted. Multi Input converters play a key role in hybrid energy systems, where it is required to have more than one power source. Utilizing multi input converters instead of using several independent converters is preffered from efficiency, component count, size, cost, and performance points of view. In order to combine more than one energy source different circuit topologies of multi input converters have been proposed in recent years. Multi input converters are categorized into electrically coupled and magnetically coupled multi input converters. In this thesis electrically coupled multi input converters are reviewed. Unfortunately hard switching problem reduces the conversion efficiency. In this thesis, after a survey on multi input converters, two new ZVS multi input converters are investigated. High efficiency, low voltage stress and component count are the features of the proposed topologies. Proposed converters are analyzed and design considrations are presented. The presented simulation results confirm the theoretical analaysis. Also one of the converters is implemented and experimental results are presented.
