Title: Exergy-based design and analysis of spiral circular and square coils for EV wireless battery charging application

Authors: Balaji Subramanian; Thangavelu Anuradha

Addresses: EEE Department, KCG College of Technology, Chennai, Tamil Nadu, India ' EEE Department, KCG College of Technology, Chennai, Tamil Nadu, India

Abstract: This paper investigates the impact of misalignment on mutual inductance (MI) in wireless power transfer systems using spiral circular and square coils. Finite element analysis (FEA) and experimental validation compare the performance of square and circular geometry coils. Results show that square coils maintain higher mutual inductance under various misalignments, making them more suitable for practical applications. Experimental results validate simulation data, demonstrating the superiority of square coils for robust WIPTS. Analytical and FEM simulations show minimal error for both circular and square coil mutual inductance and coupling coefficients at 200 mm air gap, with square coils exhibiting superior exergetic efficiency.

Keywords: electric vehicle; coupling coefficient; wireless power transfer; mutual inductance; spiral circular; square coil; finite element analysis; FEA.

DOI: 10.1504/IJEX.2025.143789

International Journal of Exergy, 2025 Vol.46 No.1, pp.13 - 31

Received: 04 Jun 2024
Accepted: 19 Sep 2024
Published online: 07 Jan 2025 *

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