Abstract A new Cuk resonant high power‐factor single‐phase AC‐to‐DC converter for the power‐factor correction is proposed in this paper, which employs zero‐current switching (ZCS) technique. Merits of the proposed converter include unity power factor, less harmonic control content, zero switching loss, simpler control stage, higher power density and unidirectional power flow. Operation principle, design analysis, small‐signal models and conditions achieving zero switching loss for the proposed converter are described. Finally, some simulation and experimental results are discussed.
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