Title: A single-phase level-shifted duty controlled multilevel rectifier-based EV charger for wide output voltage range

Authors: Rheesabh Dwivedi; Sanjeev Singh; Bhim Singh

Addresses: Department of Electrical and Instrumentation Engineering, Sant Longowal Institute of Engineering and Technology, Longowal, Sangrur, 148106, India ' Department of Electrical Engineering, Maulana Azad National Institute of Technology, Bhopal, 462051, India ' Department of Electrical Engineering, Indian Institute Technology, New Delhi, 110016, India

Abstract: Nowadays, electric vehicles (EVs) are gaining popularity with customers and as an environmentally-friendly option owing to the rise in petroleum prices and pollution, respectively. The battery is the prime source of power for EVs. This paper presents, a level-shifted duty controlled multilevel power factor correction (PFC) AC-DC converter, followed by a phase-shifted full-bridge converter (PSFBC) as an efficient charging solution for EVs. The adopted topology uses fewer semiconductor switching devices than traditional multilevel converters, which minimises switching losses, making it a good choice for a compact EV charger. Complete system design is carried out for a single-phase, 3.3 kW, EV charger, with 220 v_rms AC input and 48-72 V DC output voltage for batteries. This EV charger has improved the system reliability and efficiency, along with the near-unity power factor (UPF) in compliance with the international IEC-61000-3-2 PQ standard. MATLAB/Simulink and experimental results are presented to validate the aforementioned functionalities of this EV charger.

Keywords: five-level converter; level-shifted PWM; electric vehicles; battery charging; power quality.

DOI: 10.1504/IJPELEC.2023.131196

International Journal of Power Electronics, 2023 Vol.17 No.4, pp.443 - 465

Received: 02 Sep 2021
Accepted: 21 Mar 2022
Published online: 01 Jun 2023 *

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