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Increase in Robustness against Effects of Coil Misalignment on Electrical Parameters Using Magnetic Material Layer in Planar Coils of Wireless Power Transfer Transformer

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  • Joao Victor Pinon Pereira Dias

    (School of Science and Technology, Sophia University, Tokyo 102-8554, Japan)

  • Masafumi Miyatake

    (School of Science and Technology, Sophia University, Tokyo 102-8554, Japan)

Abstract

Utilization of wireless power transfer in light rail transits is seen as one solution for electrification of lines. The main advantage of this supply system is the reduction of installation; moreover, the alignment between the transmitter coil in the track and the receiver coil in the train should be perfect in order not to affect the power transfer. To reduce the effects of misalignment on the input and output electric parameters of the system, a new planar core and coil design, called hybrid intercore coil, is proposed. The proposed design uses a magnetic material layer between the windings in the inner half of the coil to create a non-uniform magnetic field distribution, which makes the system more robust against the effects of coil misalignment on the system current and voltage. Simulations with finite element method software were conducted to compare designs. The results show that the proposed design is less susceptible to the effects of misalignment and is more efficient. Prototype cores were constructed to verify the simulation results. Measurements show a smaller input overcurrent and output overvoltage when operating in resonance mode. The proposed design reduced the effects of coil misalignment on electrical parameters.

Suggested Citation

  • Joao Victor Pinon Pereira Dias & Masafumi Miyatake, 2018. "Increase in Robustness against Effects of Coil Misalignment on Electrical Parameters Using Magnetic Material Layer in Planar Coils of Wireless Power Transfer Transformer," Energies, MDPI, vol. 11(8), pages 1-25, July.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:8:p:1970-:d:160700
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    References listed on IDEAS

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    2. Linlin Tan & Jiacheng Li & Chen Chen & Changxin Yan & Jinpeng Guo & Xueliang Huang, 2016. "Analysis and Performance Improvement of WPT Systems in the Environment of Single Non-Ferromagnetic Metal Plates," Energies, MDPI, vol. 9(8), pages 1-16, July.
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    4. 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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