Simulation-based Optimized Transformerless Single-Switch Quadratic DC/DC Converter with Continuous Ports Current

Buck-boost DC/DC converters have been extensively employed in stepping up/down the voltage within the grid to satisfy the load need. Recently, one of these buck-boost converters provided reasonably wide voltage conversion ratio with continuous input and output ports current. However, there were no reported simulation results provided to analyze the effect of circuit components on the performance of the converter. In this paper, we present a simulation model that analysed the reported converter and proposed some modifications in circuit parameters based on an optimization technique that resulted in much higher, more stable with lower ripples output voltage than the reference converter. Moreover, the improved converter can work at higher duty cycles without suffering from high losses.