A New Single-Switch Bridgeless PFC Dual-Output-Polarities Converter with Series-Line-Diode-Clamped Configuration for Elimination Circulating Current and Capacitive Coupling Loop
DOI:
https://doi.org/10.56532/mjsat.v6i1.721Keywords:
DOP Converter, Bridgeless PFC, SLDC Configuration, Circulating Current, Capacitive Coupling LoopAbstract
This paper presents a new single-switch bridgeless PFC Dual-Output-Polarities (SSBPFC DOP) converter with a Series-Line-Diode-Clamped (SLDC) configuration, designed to eliminate circulating currents and capacitive coupling loops. The proposed topology addresses critical drawbacks in existing designs, including circulating currents, high maximum current stress on input capacitors and line diodes, and capacitive coupling loops. To overcome these issues, the line diodes are repositioned in series with the input inductors. The converter operates in discontinuous conduction mode (DCM) to achieve a near-unity power factor. The paper thoroughly explains the operational principles and design considerations of the new structure. It also discusses the transition from a two-switch to a single-switch design for both shared and non-shared operation modes. Detailed analyses of circulating current, maximum current stress, and capacitive coupling loop mechanisms are provided. Simulation results demonstrate the complete elimination of circulating currents and capacitive coupling loops, with maximum current stress on input capacitors and line diodes reduced from 13.91 A to 7.6 A.
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Copyright (c) 2026 Mohamad Kamil Romai Noor, Asmarashid Ponniran, Afarulrazi Abu Bakar, Mohd Amirul Naim Kasiran, Mohd Hafizie Yatim, Mohd Nasri Abd Samat
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