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<p>This study proposes an interleaved high step-up DC–DC converter with a winding cross-coupled inductor (WCCI), featuring a low input current ripple. An active snubber circuit enables a zero-voltage transition for the main switches, enhancing overall efficiency. The auxiliary switch in the converter operates under zero-current switching. Moreover, zero-current switching is achieved during the turn-off for all diodes. The use of the WCCI technique significantly reduces input current ripple, making the proposed converter highly suitable for photovoltaic and fuel cell applications. The voltage gain of the converter is increased through the use of a voltage multiplayer cell and coupled inductors. The utilization of an interleaved topology reduces the switch peak current and improves overall efficiency. Furthermore, the use of two separate power transmission paths to the output helps in optimizing loss distribution in the converter. Given that all MOSFETs have their sources connected to ground, the control of the converter switches is simplified, eliminating the need for bootstrap method or complex gate drivers. A 400&#xa0;W prototype converter with a 48&#xa0;V input and a 400&#xa0;V output has been developed to validate the theoretical study and verify the improved efficiency of the topology.</p>

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Zero-voltage-transition interleaved high step-up converter utilizing winding-cross-coupled inductors

  • 期刊论文

  • 发表日期：

    2025年8月29日

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  • Jabbar Qasim Fahad Almaliki,
  • Majid Delshad,
  • Wameedh R. Abdul-Adheem,
  • Ehsan Heydarian-Forushani,
  • Hadi Saghafi

摘要

This study proposes an interleaved high step-up DC–DC converter with a winding cross-coupled inductor (WCCI), featuring a low input current ripple. An active snubber circuit enables a zero-voltage transition for the main switches, enhancing overall efficiency. The auxiliary switch in the converter operates under zero-current switching. Moreover, zero-current switching is achieved during the turn-off for all diodes. The use of the WCCI technique significantly reduces input current ripple, making the proposed converter highly suitable for photovoltaic and fuel cell applications. The voltage gain of the converter is increased through the use of a voltage multiplayer cell and coupled inductors. The utilization of an interleaved topology reduces the switch peak current and improves overall efficiency. Furthermore, the use of two separate power transmission paths to the output helps in optimizing loss distribution in the converter. Given that all MOSFETs have their sources connected to ground, the control of the converter switches is simplified, eliminating the need for bootstrap method or complex gate drivers. A 400 W prototype converter with a 48 V input and a 400 V output has been developed to validate the theoretical study and verify the improved efficiency of the topology.