Industrial Electronics
Mustafa Okati; Mohammad Osmani-Bojd
Abstract
This study introduces a non-isolated semi-quadratic DC/DC buck-boost converter designed to enhance performance. Derived from a conventional CUK converter, the proposed topology operates in two distinct modes: one providing a semi-quadratic voltage gain of D(2−D)/(1−D)2 and the other offering ...
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This study introduces a non-isolated semi-quadratic DC/DC buck-boost converter designed to enhance performance. Derived from a conventional CUK converter, the proposed topology operates in two distinct modes: one providing a semi-quadratic voltage gain of D(2−D)/(1−D)2 and the other offering a gain of D/(1−D). In addition, the proposed structure features constant input and output currents due to the presence of inductive filters at the input and output ports, which reduces the current stress on the capacitors at the output port and lowers the voltage ripple. Under steady-state conditions, the continuous conduction mode efficiency of the converter and small-signal modeling were analyzed by considering the effects of parasitic resistance. The results demonstrated lower total switching device power and a reduced component count than other buck-boost converters in dual-mode operation. The proposed converter was simulated using PLECS software. The experimental results were consistent with theoretical predictions due to their high efficiency and applications, particularly in photovoltaic systems and fuel cells.
