Abstract
This paper presents the design, simulation and analysis of one of the least understood Switch mode power converter i.e., Single-ended primary-inductor converter (SEPIC). This dc-dc converter can be used as a buck-boost converter by varying the duty cycle of the switching element. SEPIC has distinct advantage of providing positive polarity output voltage and ripple free input and output current with less stress on components. This is in comparison to traditional buck-boost converter which has negative polarity output voltage besides having highly discontinuous currents and more stress on the components. This makes it ideal for industrial and domestic applications like smart home appliances based on PV energy. Extensive simulation has been carried out in continuous conduction mode (CCM) using SIMULINK-MATLAB under different input conditions. PI controller has been incorporated to fine-tune the response, minimize the steady state error while maintaining the constant output voltage. The hardware realization of SEPIC converter validates the simulation results.
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