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Two-Coil Receiver for Electrical Vehicles in Dynamic Wireless Power Transfer

Author

Listed:
  • Tommaso Campi

    (Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy)

  • Silvano Cruciani

    (Department of Astronautics, Electrical and Energetics Engineering, Sapienza University of Rome, 00184 Rome, Italy)

  • Francesca Maradei

    (Department of Astronautics, Electrical and Energetics Engineering, Sapienza University of Rome, 00184 Rome, Italy)

  • Mauro Feliziani

    (Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy)

Abstract

Dynamic wireless power transfer (DWPT) of electric vehicles (EVs) is the future of urban mobility. The DWPT is often based on a series of short track pads embedded in road pavement that wirelessly transfers electrical energy to EVs equipped with a pickup coil for battery charging. An open problem with this technology is the variation of the coupling factor as a vehicle switches from one transmitting coil to another during its motion. This can cause a significant change in power with possible power spikes and holes. In order to overcome these issues, a new architecture is here proposed based on two pick-up coils mounted in the vehicle underneath. These identical receiver coils are placed in different positions under the vehicle (one in front and the other in the rear) and are activated one at a time so that inductive coupling is always good enough. This innovative configuration has two main advantages: (i) it maintains a nearly constant coupling factor, as well as efficiency and transferred power, as the vehicle moves along the electrified road; (ii) it significantly reduces the cost of road infrastructure. An application is presented to verify the proposed two-coil architecture in comparison with the traditional one-coil. The results of the investigation show the significant improvement achieved in terms of maximum power variation which is nearly stable with the proposed two-coil architecture (only 2.8% variation) while there are many power holes with the traditional single coil architecture. In addition, the number of the required transmitting coils is significantly reduced due to a larger separation between adjacent coils.

Suggested Citation

  • Tommaso Campi & Silvano Cruciani & Francesca Maradei & Mauro Feliziani, 2021. "Two-Coil Receiver for Electrical Vehicles in Dynamic Wireless Power Transfer," Energies, MDPI, vol. 14(22), pages 1-14, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7790-:d:684376
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    References listed on IDEAS

    as
    1. Valerio De Santis & Tommaso Campi & Silvano Cruciani & Ilkka Laakso & Mauro Feliziani, 2018. "Assessment of the Induced Electric Fields in a Carbon-Fiber Electrical Vehicle Equipped with a Wireless Power Transfer System," Energies, MDPI, vol. 11(3), pages 1-9, March.
    2. Tommaso Campi & Silvano Cruciani & Francesca Maradei & Mauro Feliziani, 2019. "Magnetic Field during Wireless Charging in an Electric Vehicle According to Standard SAE J2954," Energies, MDPI, vol. 12(9), pages 1-24, May.
    3. Silvano Cruciani & Tommaso Campi & Francesca Maradei & Mauro Feliziani, 2020. "Active Shielding Applied to an Electrified Road in a Dynamic Wireless Power Transfer (WPT) System," Energies, MDPI, vol. 13(10), pages 1-14, May.
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    Cited by:

    1. Tommaso Campi & Silvano Cruciani & Francesca Maradei & Mauro Feliziani, 2023. "Electromagnetic Interference in Cardiac Implantable Electronic Devices Due to Dynamic Wireless Power Systems for Electric Vehicles," Energies, MDPI, vol. 16(9), pages 1-17, April.
    2. Yumeng Lan & Masafumi Miyatake, 2022. "An Attended-Free, All-in-One-Go, Automatic Analysis Assistant Software for E-liked Shape Contactless Inductive Power Transfer Device," Energies, MDPI, vol. 15(17), pages 1-23, August.
    3. Fei Lu & Chong Zhu, 2022. "Advanced Wireless Power Transfer Technologies," Energies, MDPI, vol. 15(9), pages 1-2, April.

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