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Enhancement of Wireless Power Transmission Efficiency and Flexibility via an Optimized Three-Dimensional Coupled Magnetic Resonance System with Double Transmitter Coil

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Abstract

Wireless power transmission (WPT) has gained considerable attention in recent years due to its convenience. Moreover, various research especially 3D coil structure studies in WPT are emerging through continuous research. However, most of these power sources are too volumetric to charge mobile devices, and the recently proposed 3D couple magnetic resonance system (CMRS) represents not only a lower power transmission efficiency (PTE) than the 2D system, but the PTE decreases sharply as the distance between the coils increases. To improve these drawbacks, this study proposes a novel approach to power mobile devices using a 3D spiral coil structure and a double transmitter coil system simultaneously. The mathematical model is presented, and three different coil structures are designed to evaluate the most power-efficient 3D coil structure. The proposed model is obtained and verified based on the simulation and experiment results. The result showed that when the distance between coils is the closest (8 mm), the PTE was 55.77%, which is improvement compared to that of the pervious 3D CMRS studies. Moreover, the PTE did not decrease sharply since our proposed system has the double resonance frequencies. Mathematical model, simulation, and experiment are provided to verify the feasibility of the proposed model.

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Authors and Affiliations

  1. Department of Mechanical and Control Engineering, Handong Global University, 558, Handong-ro, Heunghae-eup, Buk-gu, Pohang-si, Gyeongsangbuk-do, Korea

    Gi-Jong Gwon & Youngsung Kwon

  2. Journal of Electrical Engineering and Technology (JEET), The Korean Institute of Electrical Engineers (KIEE), Room #901, New B/D, Science and Technology Building, Teheranro7-gil (635-4, Yucksam-Dong), Kangnam-Ku, Seoul, 135-703, Korea

    Gi-Jong Gwon

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  1. Gi-Jong Gwon
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  2. Youngsung Kwon
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Correspondence to Youngsung Kwon.

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Gwon, GJ., Kwon, Y. Enhancement of Wireless Power Transmission Efficiency and Flexibility via an Optimized Three-Dimensional Coupled Magnetic Resonance System with Double Transmitter Coil. J. Electr. Eng. Technol. 16, 1415–1426 (2021). https://doi.org/10.1007/s42835-021-00700-0

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  • DOI: https://doi.org/10.1007/s42835-021-00700-0

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