Analysis, Modeling, and Implementation of Wireless Power Transfer

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: 15 September 2026 | Viewed by 605

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Guest Editor
School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
Interests: wireless power transfer

Special Issue Information

Dear Colleagues,

Wireless power transfer (WPT) systems are becoming increasingly important in modern energy delivery infrastructures, enabling contactless power supply for applications ranging from consumer electronics and biomedical devices to electric vehicles, industrial automation, and dynamic charging systems. As WPT technologies continue to evolve, their design and deployment involve complex interactions among electromagnetic coupling, power electronics, control strategies, system dynamics, and practical implementation constraints. Addressing these challenges requires rigorous analysis, accurate modeling, and validated implementation methodologies.

This Special Issue is devoted to the analysis, modeling, and implementation of wireless power transfer systems, aiming to advance both theoretical foundations and practical engineering solutions. We invite contributions that focus on analytical, numerical, and data-driven modeling of WPT systems, including circuit-level, electromagnetic, and system-level approaches. Topics of interest include efficiency optimization, misalignment tolerance, parameter estimation, real-time control, dynamic and mobile WPT, multi-receiver systems, and robustness under varying loads and coupling conditions.

The Special Issue also welcomes papers on experimental validation, hardware prototyping, and system integration, with attention to standard compliance, safety, electromagnetic compatibility, and real-world deployment. We invite authors to submit high-quality original research articles, review papers, and case studies that bridge theory and practice and that contribute to the reliable, efficient, and scalable adoption of wireless power transfer technologies.

Dr. Junming Zeng
Guest Editor

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Keywords

  • wireless power transfer
  • inductive power transfer
  • capacitive power transfer

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Published Papers (1 paper)

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Research

24 pages, 7881 KB  
Article
Evolutionary Mechanism of Frequency Splitting in Tri-Coil Dual-Load MCR–WPT Systems Considering Cross-Coupling Effects
by Xuejin Yi, Song Xu, Lijuan Wang, Wei Jiang and Seiji Hashimoto
Electronics 2026, 15(13), 2902; https://doi.org/10.3390/electronics15132902 - 2 Jul 2026
Viewed by 242
Abstract
In multi-coil, multi-load magnetically coupled resonant wireless power transfer (MCR–WPT) systems, the non-negligible cross-coupling among multiple resonators, including the transmitter (Tx), receiver 1 (Rx1), and receiver 2 (Rx2), introduces complex frequency-splitting behavior through the Tx–Rx1, Tx–Rx2, and Rx1–Rx2 coupling paths, severely constraining transmission [...] Read more.
In multi-coil, multi-load magnetically coupled resonant wireless power transfer (MCR–WPT) systems, the non-negligible cross-coupling among multiple resonators, including the transmitter (Tx), receiver 1 (Rx1), and receiver 2 (Rx2), introduces complex frequency-splitting behavior through the Tx–Rx1, Tx–Rx2, and Rx1–Rx2 coupling paths, severely constraining transmission efficiency and operational stability. In practical multi-receiver WPT applications, receiver-side cross-coupling is often unavoidable and may shift the maximum-power and maximum-efficiency points away from the designed resonant frequency. Clarifying this mechanism is therefore important for coil arrangement, impedance matching, and stable multi-load power delivery. This paper establishes an equivalent circuit model to derive analytical expressions for input impedance, load power, and efficiency. Based on this framework, the formation mechanism of frequency splitting under concurrent coupling paths is systematically investigated. The results indicate that dominant coupling paths dictate the positions and magnitudes of primary split peaks, while cross-coupling between receivers induces local modal reconfiguration and energy redistribution, leading to secondary or minor characteristic peaks. Both simulation and experimental results demonstrate that the coupling coefficient primarily governs the frequency-splitting trajectory, whereas load resistance predominantly modulates peak amplitudes. For k=0.520, the split-frequency peaks in the two-coil benchmark occur at 64.6 kHz and 103.8 kHz, showing good agreement with the calculated modal frequencies. In the tri-coil dual-load system, pronounced power peaks around 63 kHz and 112 kHz further confirm the shift of the maximum-power transfer points under asymmetric coupling and loading conditions. Furthermore, under strong-coupling conditions, the maximum power transfer point shifts from the nominal resonant frequency toward the system’s inherent modal frequencies. This study elucidates the evolution of frequency splitting in tri-coil dual-load systems, providing a theoretical foundation for parameter optimization in multi-node WPT networks. Full article
(This article belongs to the Special Issue Analysis, Modeling, and Implementation of Wireless Power Transfer)
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