It is shown that reduction of the switch current and soft-switching operation improves the overall efficiency. Also, the leakage inductance energy is recycled and continuity of the input and output currents are preserved. In addition, the switch current is reduced in comparison with the conventional Cuk converter resulting in lower current stress. In the proposed converter, the power switch turns on and off under zero-current-switching and zero-voltage-switching conditions, respectively. Therefore, without using any extra active switch, the soft-switching operation is attained and the switching losses are reduced. The improved topology has only three passive components in addition to the elements of the conventional counterpart, an extra winding, an auxiliary diode, and an auxiliary inductor. This paper proposes an improved topology for the conventional DC–DC Cuk converter operating in discontinuous-capacitor-voltage mode which provides soft-switching conditions for all the semiconductor devices. IET Generation, Transmission & Distribution.IET Electrical Systems in Transportation.IET Cyber-Physical Systems: Theory & Applications.IET Collaborative Intelligent Manufacturing.CAAI Transactions on Intelligence Technology.
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