Solar Energy Based Transformer Less DC-DC Converter with Multiple Output Voltages

Abstract

The conventional converters like Cuk, Sepic and Buck-boost Converters offer limited voltage gain due to internal duty cycle constraints. The operation of these converters at extremely high duty cycles to deliver high output voltages will lead to severe issues. The voltage spikes and electromagnetic interference problems are most commonlywitnessed in isolated Converters like Forward, Full Bridge, Resonant and Bidirectional Converters due to the use of transformer which has finite leakage inductance. In this paper, a new topology of a transformer less DC-DC boost converter with multiple output voltages has been proposed to surpass the above specified drawbacks. The proposed converter is operated in a minimum duty cycle range and simultaneously supplies multiple output voltages of different magnitudes. These converters are fed with solar energy and find the major applications in Micro grid applications.