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A new non-isolated high step-up SEPIC converter for photovoltaic applications

In this paper a new high step up non-isolated SEPIC converter is introduced and analyzed. This converter is a proper choice for photovoltaic applications. The voltage gain of the proposed converter is higher than a regular SEPIC converter while the switch voltage stress is same as a regular SEPIC converter. The proposed converter is analyzed and operating modes of the proposed converter are discussed. The presented experimental results justify the validity of theoretical analysis. Also, soft switching techniques are applied to the proposed converter to achieve higher efficiency and to reduce the voltage stress across semiconductor devices.