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10.1049_pel2.12157.pdf (5.42 MB)

Development of a three‐phase interleaved converter based on SEPIC DC–DC converter operating in discontinuous conduction mode for ultra‐fast electric vehicle charging stations

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submitted on 2024-07-03, 13:50 and posted on 2024-07-03, 13:51 authored by Bayan Hussein, Nima Abdi, Ahmed Massoud

One of the main challenges that impact transportation systems electrification is their batteries' charging process. This work presents the development of a three‐phase ultra‐fast Electric Vehicle (EV) charger based on the SEPIC converter. Since SEPIC operating in Discontinuous Conduction Mode (DCM) is usually recommended for low‐power applications, this work proposes a scheme for its employment in high‐power EV chargers. This is achieved through three single‐phase modules of interleaved SEPIC converters. The presented scheme ensures reducing the stresses on the semiconductor devices since the power is divided over the interleaved modules. The design addresses DCM operation in terms of both capacitor voltage and inductor current (DCVM and DICM, respectively). This paper examines the analysis of the proposed converter and the small‐signal modelling. Also, the converter efficiency is assessed. A Constant Current (CC) charging approach is deployed for charging the EV battery. The validation of the designs is explored through simulation results using MATLAB/Simulink platform. A 4 kW experimental prototype for the interleaved SEPIC DC–DC converter is built to verify the claimed contributions with 92% efficiency.

Other Information

Published in: IET Power Electronics
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Open Access funding provided by the Qatar National Library.

Qatar National Research Fund (NPRP10-0130-170286), Development of Intelligent Grid Interactive Fast Chargers for Industrial Utility Vehicles and Commercial Transport Carts.



  • English


Institution of Engineering and Technology

Publication Year

  • 2021

License statement

This Item is licensed under the Creative Commons Attribution 4.0 International License.

Institution affiliated with

  • Qatar University
  • College of Engineering - QU