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<p>This paper presents the design and implementation of a Dual-Mode Interleaved Bridgeless Converter which enhances the overall efficiency of Electric Vehicle (EV) battery chargers. The converter architecture adopts an interleaved configuration that facilitates improved power conversion by operating in both Discontinuous Inductor Current Mode (DICM) and Discontinuous Capacitor Voltage Mode (DCVM), effectively minimizing switching losses without compromising output power. This dual-mode operation enables seamless transitions between constant current (CC) and constant voltage (CV) charging stages, thereby optimizing energy transfer during the battery charging process. The proposed design incorporates a flyback-based isolated topology to ensure safe and efficient power delivery from the grid to the battery. A dual-loop control strategy is employed to manage DICM and DCVM operation, ensuring stable and efficient performance in both CC and CV modes. The converter is mathematically modelled using MATLAB, and its steady-state and dynamic behaviors are evaluated through both simulation and experimental validation for a 1.3 <i>k</i>W system. The proposed EV battery charger achieves a peak efficiency of 98%, demonstrating significant improvements in both power quality and energy efficiency. The results validate the suitability of the converter for modern EV applications, supporting sustainable and energy-efficient transportation solutions.</p>

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A Dual-Mode Interleaved Bridgeless Converter with Improved Efficiency for Electric Vehicle Battery Charger

  • 期刊论文

  • 发表日期：

    2025年9月26日

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  • F. Max Savio,
  • Kalpana Dharmalingam,
  • Kamal Chakkarapani

摘要

This paper presents the design and implementation of a Dual-Mode Interleaved Bridgeless Converter which enhances the overall efficiency of Electric Vehicle (EV) battery chargers. The converter architecture adopts an interleaved configuration that facilitates improved power conversion by operating in both Discontinuous Inductor Current Mode (DICM) and Discontinuous Capacitor Voltage Mode (DCVM), effectively minimizing switching losses without compromising output power. This dual-mode operation enables seamless transitions between constant current (CC) and constant voltage (CV) charging stages, thereby optimizing energy transfer during the battery charging process. The proposed design incorporates a flyback-based isolated topology to ensure safe and efficient power delivery from the grid to the battery. A dual-loop control strategy is employed to manage DICM and DCVM operation, ensuring stable and efficient performance in both CC and CV modes. The converter is mathematically modelled using MATLAB, and its steady-state and dynamic behaviors are evaluated through both simulation and experimental validation for a 1.3 kW system. The proposed EV battery charger achieves a peak efficiency of 98%, demonstrating significant improvements in both power quality and energy efficiency. The results validate the suitability of the converter for modern EV applications, supporting sustainable and energy-efficient transportation solutions.