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Lookup NU author(s): Dr Ehsan Farmahini Farahani, Professor Volker Pickert
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2025 by the authors. Inductive wireless power transfer (IWPT) with stable output power and high efficiency is a major challenge for charging electric vehicles (EVs). This paper, for the first time, develops a robust IWPT system using a circular pad (CP) and double-D pad (DDP) with a self-oscillating controlled inverter (SOCI), which offers high steady output power and transfer efficiency under magnetic coupling variations simply with feedback from the transmitter-side current. The compact 2CP and 2DDP magnetic couplers with single identical coils are robust to self- and mutual-inductance variations, so the IWPT system exhibits greater robustness at increased transfer distances (air gaps), as well as in the presence of lateral and rotational misalignments between the two magnetic pads, compared to couplers using nonidentical transmitting primary (TP) and receiving secondary (RS) pads and numerous decoupled coils on the RS pad. Based on a thorough analysis and experimental study, the proposed 1 kW IWPT system with 2CP and 2DDP couplers with up to a 20 cm air gap achieves constant output power with 93% and 92% constant transfer efficiency, respectively. The 2CP with a 15 cm air gap and the 2DDP with a 20 cm air gap, with up to 12 cm lateral misalignment, can tolerate coupling variations.
Author(s): Eikani A, Amirkhani M, Farmahini Farahani E, Pickert V, Mirsalim M, Vaez-Zadeh S
Publication type: Article
Publication status: Published
Journal: Energies
Year: 2025
Volume: 18
Issue: 1
Online publication date: 06/01/2025
Acceptance date: 19/12/2024
Date deposited: 21/01/2025
ISSN (electronic): 1996-1073
Publisher: MDPI
URL: https://doi.org/10.3390/en18010211
DOI: 10.3390/en18010211
Data Access Statement: The original contributions presented in the study are included in the article, further inquiries can be directed to the corresponding author.
