Generation of new nonisolated high voltage gain DC-DC converters

This paper introduces a family of nonisolated DC-DC converters based on high voltage gain multi-states switching cell (HVG-MSSC). The proposed converters are employed in application where high output voltage is required. Normally, the output voltage generated by photovoltaic panels, small wind generators, fuel cells, batteries, and ultracapacitors is low. Then, this low voltage must be increased to 200Vdc, 400Vdc or 800Vdc (dependently of inverter topology and its rms output voltage) in order to feed power inverters and provide a high quality sinusoidal waveform of 115Vac or 230Vac. The proposed converters are derived from six classic converters: Buck, Boost, Buck-Boost, Cuk, Sepic and Zeta. The theoretical analysis of converters, as well as example design and experimental results for a 1kW Sepic converter is presented in this paper.