Innovative Single-Stage Switched Inductor Cuk Converter for High-Efficiency Low-Voltage High-Current DC Power Supply for Electric Vehicle Battery Charging Applications

This paper introduces an innovative solution for the conversion of fixed DC voltage sources to variable DC voltage sources for EV battery charging applications. The paper presents a single-stage switched inductor Cuk converter design to achieve a high-efficiency low-voltage high-current DC power supply. The single-stage switched inductor Cuk converter proposed here is different from the two-stage converter normally used for power factor correction in battery charging in order to increase the step-down gain of the converter, reduce the current stress, and reduce the number of components required for the converter. To start with the research work, the extensive literature survey is given afore, which differentiates the proposed converter with the existing converter advancements and their problems. The mathematical model of the proposed converter is given in the paper to explain the behavior of the proposed converter. A comprehensive simulation work is carried out to validate the theoretical model of the proposed converter using MATLAB/Simulink. A physical prototype of single-stage switched inductor Cuk converter is developed in order to substantiate the theoretical and simulation findings. Thus, the prototype is able to prove that the proposed converter is applicable and feasible to be used in the practical real-world EV charging source. Besides that, the paper also gives the contribution over the applications of the converter which is beyond the technical of converter design. The paper also explains the potential impact of the proposed converter toward the power quality.