presenting a new high gain boost converter with inductive coupling energy recovery snubber for renewable energy systems- simulation, design and construction

Solar energy is one of the most important sources of energy because it is a renewable and inexhaustible energy. this paper presents a new energy recovery snubber for a high step-up boost converter, which can be used in renewable energy systems such as photovoltaic. the proposed snubber enjoys useful advantages such as providing soft-switching conditions, high voltage gain, simplicity of control, and balanced voltage stresses. in this topology, the voltage stress on the diodes and switches is a small percentage of the output voltage. a simple boost and a fly-forward converter are used to increase the output voltage. a snubber circuit is used for the main switch to recover the energy of the snubber capacitor. therefore, the main switch turns off at low voltage and it causes a reduction in turn off loss. experimental results of a 48v to 380v and 500w laboratory prototype show efficiency greater than 95% and verify the given theoretical analysis.