A universal, communication-free inductive power transfer system achieving uniform voltage gain for electric vehicle charging

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Issa, Mahmoud and Hamad, Mostafa S. and El-Zonkoly, Amany and Gaona, David Campos and Anaya-Lara, Olimpo; (2025) A universal, communication-free inductive power transfer system achieving uniform voltage gain for electric vehicle charging. In: 2025 10th IEEE Workshop on the Electronic Grid (eGRID). IEEE Workshop on the Electronic Grid (eGRID) . IEEE, GBR. ISBN 9798331593643 (https://doi.org/10.1109/egrid63452.2025.11255006)

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Abstract

As electric vehicles (EVs) continue to gain popularity, inductive power transfer (IPT) has emerged as a promising method for wireless charging of EVs due to its simplicity, safety, and enhanced user convenience. This paper presents a universal IPT system that features a series-series LC resonant circuit and a novel control method that ensures uniform voltage gain across a wide range of magnetic coupling and load conditions. Unlike conventional approaches that rely on predefined operating frequencies or iterative frequency tracking, the proposed method automatically identifies the optimal operating frequency, allowing for faster initialization of the charging process. The system employs a communication-free parameter estimation technique that relies solely on primary-side measurements, thereby eliminating the need for secondary-side feedback. Moreover, the proposed method operates without prior knowledge of secondary-side parameters, even with nonidentical LC circuits, provided that both sides share the same resonance frequency, which can be standardized in future designs. The simulation results confirm that the proposed system outperforms traditional techniques, with the voltage gain remaining close to the theoretical value, and the frequency estimation accuracy exceeding 99.9% under varying coupling conditions. The approach can be easily integrated into existing EV charging infrastructure with minimal modification, offering a universal, cost-effective, and scalable solution for future wireless power transfer applications.

ORCID iDs

Issa, Mahmoud, Hamad, Mostafa S., El-Zonkoly, Amany, Gaona, David Campos ORCID logoORCID: https://orcid.org/0000-0002-0347-6288 and Anaya-Lara, Olimpo ORCID logoORCID: https://orcid.org/0000-0001-5250-5877;
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