Title: A detailed computational modelling and analysis of the effect of geometric dimensions for electromagnetic coil assembly to transfer power wirelessly in electric vehicles

Authors: Ankur Yadav; Shukla Karmakar; Tushar Kanti Bera

Addresses: Department of Electrical Engineering, NIT Durgapur, Mahatma Gandhi Rd, Durgapur, 713209 West Bengal, India ' Department of Electrical Engineering, NIT Durgapur, Mahatma Gandhi Rd, Durgapur, 713209 West Bengal, India ' Department of Electrical Engineering, NIT Durgapur, Mahatma Gandhi Rd, Durgapur, 713209 West Bengal, India

Abstract: The PC-based wireless power transfer (WPT) coil design procedure is promising for complex designs and calculating the design parameters for efficient power transfer in EV systems. This work investigates the effect of the three-dimensional geometry of electromagnetic coil assemblies for transmitting and receiving coils with circular bases and compares different geometry parameters. The WPT coil was developed with the conical helix geometry, cylindrical helix, and planar coil with ferrite and aluminium shielding to provide enhanced coupling (k) along the aluminium shielding to reduce the magnetic leakage in the surroundings, assuring minimum loss and better k, self and mutual-inductance (L, M), flux density (B), and field intensity (H) with maximum efficiency. The proposed geometry also provides minimum current density and maximum flux linkage, confirming better WPT. All modelling and simulation work was conducted in the Ansys Maxwell. The circular base conical helix with shielding is promising for WPT-based EV-charging systems.

Keywords: electric vehicles; EVs; wireless power transfer; WPT; Ansys Maxwell; coil design; coupling co-efficient; aluminium shielding.

DOI: 10.1504/IJEHV.2024.140003

International Journal of Electric and Hybrid Vehicles, 2024 Vol.16 No.3, pp.261 - 276

Received: 20 Jun 2023
Accepted: 13 Nov 2023
Published online: 15 Jul 2024 *

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