Exergy based Design and Analysis of Spiral Circular and Square Coils for EV Wireless Battery Charging Application

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.