A Closed-Loop Using Sampled-Data Controller for a New Nonisolated High-Gain DC-DC Converter

This article tries closed-loop using a sampled-data (SD) controller for a new nonisolated dc-dc converter to maintain the constant voltage. The developed nonisolated converter attains a higher voltage gain and reduced voltage stress across the power semiconductor switch. The converter topology provides a higher voltage gain (10) at a duty ratio of 0.6. The operation of the proposed converter is discussed in continuous conduction mode, discontinuous conduction mode, and boundary conduction mode. The performance of the converter is examined under open-loop and closed-loop conditions by changing the duty ratio and load values. An SD control increases the control performance in the closed-loop condition. The suggested Lyapunov functional can entirely use system data. Exponential stability criteria created by linear matrix inequalities are deduced using improved inequality techniques and some sufficient conditions. Average dwell time is calculated as a type of inequality considering the sample interval. A laboratory-based experimental prototype is designed to corroborate the performance of the proposed converter in open-loop and closed-loop operations during steady-state and dynamic conditions. The effectiveness of the developed converter is analyzed by comparing the voltage gain, the ratio of voltage stress to voltage gain, and the ratio of voltage gain to total component count with recently developed quadratic-based converters and nonquadratic-based converters. A component stress factor and switch device power are examined to showcase the voltage stress and power handling capability. Experimental results are closely matched with the theoretical calculations. The power density of the proposed converter is 1.02 kW/L.