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New single-switch buck-boost converter with continuous input/output currents and a wide conversion range.

Mohammad Lotfi-Nejad1, Hossein Hajisadeghian1, Amir Abbas Aghajani1

  • 1Faculty of Electrical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran.

Heliyon
|September 17, 2024
PubMed
Summary
This summary is machine-generated.

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This study introduces a novel single-switch buck-boost converter for efficient high step-up/down power conversion. The innovative design ensures continuous input/output current, suitable for various demanding applications.

Area of Science:

  • Electrical Engineering
  • Power Electronics

Background:

  • Traditional DC-DC converters often struggle with high voltage conversion ratios or require complex switching arrangements.
  • Achieving both significant voltage step-up and step-down capabilities with minimal components presents a persistent challenge in power electronics.

Purpose of the Study:

  • To propose a new single-switch buck-boost converter topology for high step-up and step-down applications.
  • To introduce a modified version with dual outputs offering distinct voltage gains.
  • To validate the performance and efficiency of the proposed converters.

Main Methods:

  • Analysis of steady-state operation in Continuous Conduction Mode (C.C.M).
  • Development and simulation of the proposed converter circuits.
  • Experimental validation using a laboratory prototype.
Keywords:
Buck-boostDC-DC converterHigh step-upSingle-switchWide conversion ratio

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Main Results:

  • The proposed single-switch semi-quadratic converter effectively achieves high step-up voltage gain.
  • A modified topology provides two outputs with different voltage gains, including a quadratic gain output.
  • Simulation and experimental results demonstrate compatibility with theoretical analysis for both step-up and step-down modes.

Conclusions:

  • The introduced single-switch buck-boost converter offers a versatile and efficient solution for high step-up/down power conversion.
  • The dual-output variant expands applicability for systems requiring multiple voltage levels.
  • The validated performance confirms the practical utility of the proposed topologies.