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A Cross-Shape Coil Structure for Use in Wireless Power Applications

Author

Listed:
  • Seyit Ahmet Sis

    (Electrical and Electronics Engineering, Balikesir University, Balikesir 10145, Turkey)

  • Emre Orta

    (Electrical and Electronics Engineering, Balikesir University, Balikesir 10145, Turkey)

Abstract

This paper presents a novel coil structure employing two parallel-connected subunit rectangular coils. The structure is based on the fact that the rectangular coils are less sensitive to misalignment along its longer side. Therefore, two identical subunit rectangular coils are vertically-oriented to one another and connected in parallel to form a cross-shape coil. The cross-shape coils have the advantage of better misalignment tolerance as compared to circular and square coils with similar footprints at the cost of an increased wire usage. Electromagnetic simulations and experiments on various small-sized coils are performed to verify the advantages of the proposed coil structure. Based on the simulation and measurement results, cross-shape coils exhibit not only better tolerance to misalignment, but also smaller self-inductance values resulting in larger coupling coefficients as compared to square and circular coils. A large cross-shape coil pair consisting of 100 × 70 cm subunit rectangles are fabricated with copper tubes and utilized in a frequency-tuned wireless power transfer system. When coils are separated by 17 cm, a near constant efficiency of more than 89% up to 15 cm misalignment along x - or y -directions and 13 cm along diagonal direction is obtained in the frequency-tuned system.

Suggested Citation

  • Seyit Ahmet Sis & Emre Orta, 2018. "A Cross-Shape Coil Structure for Use in Wireless Power Applications," Energies, MDPI, vol. 11(5), pages 1-14, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:5:p:1094-:d:143800
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    References listed on IDEAS

    as
    1. Kafeel Ahmed Kalwar & Saad Mekhilef & Mehdi Seyedmahmoudian & Ben Horan, 2016. "Coil Design for High Misalignment Tolerant Inductive Power Transfer System for EV Charging," Energies, MDPI, vol. 9(11), pages 1-13, November.
    2. Thuc Phi Duong & Jong-Wook Lee, 2015. "A Dynamically Adaptable Impedance-Matching System for Midrange Wireless Power Transfer with Misalignment," Energies, MDPI, vol. 8(8), pages 1-25, July.
    3. Karam Hwang & Jaeyong Cho & Dongwook Kim & Jaehyoung Park & Jong Hwa Kwon & Sang Il Kwak & Hyun Ho Park & Seungyoung Ahn, 2017. "An Autonomous Coil Alignment System for the Dynamic Wireless Charging of Electric Vehicles to Minimize Lateral Misalignment," Energies, MDPI, vol. 10(3), pages 1-20, March.
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    Cited by:

    1. Mohamad Abou Houran & Xu Yang & Wenjie Chen, 2018. "Free Angular-Positioning Wireless Power Transfer Using a Spherical Joint," Energies, MDPI, vol. 11(12), pages 1-26, December.
    2. Emrullah Aydin & Mehmet Timur Aydemir & Ahmet Aksoz & Mohamed El Baghdadi & Omar Hegazy, 2022. "Inductive Power Transfer for Electric Vehicle Charging Applications: A Comprehensive Review," Energies, MDPI, vol. 15(14), pages 1-24, July.
    3. Francisco Javier López-Alcolea & Javier Vázquez & Emilio J. Molina-Martínez & Pedro Roncero-Sánchez & Alfonso Parreño Torres, 2020. "Monte-Carlo Analysis of the Influence of the Electrical Component Tolerances on the Behavior of Series-Series- and LCC-Compensated IPT Systems," Energies, MDPI, vol. 13(14), pages 1-28, July.
    4. Mohamed, Ahmed A.S. & Shaier, Ahmed A. & Metwally, Hamid & Selem, Sameh I., 2020. "A comprehensive overview of inductive pad in electric vehicles stationary charging," Applied Energy, Elsevier, vol. 262(C).
    5. Pradeep Vishnuram & Suresh Panchanathan & Narayanamoorthi Rajamanickam & Vijayakumar Krishnasamy & Mohit Bajaj & Marian Piecha & Vojtech Blazek & Lukas Prokop, 2023. "Review of Wireless Charging System: Magnetic Materials, Coil Configurations, Challenges, and Future Perspectives," Energies, MDPI, vol. 16(10), pages 1-31, May.

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