Impact of Inner Radius Variation on Coil Performance in WPT Systems

The rise of greener automobiles, made possible by wireless power transmission, has changed and boosted the transportation industry. Wireless transmission has gained popularity because of its many benefits, although misalignment is problematic. These days, one of the most frequent causes of misalignment in the vertical parallel position is due to variations in the inner radius for both static and dynamic charging. The impact of coil radius in vertical misalignment during charging is the main focus of this work's analysis. 3D FEM simulation is used to build and analyze a very simple, low-cost, square-type transmitter-receiver coil with asymmetric properties. According to the analysis, the mutual inductance, coupling coefficient, and transmission efficiency all rise with values of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$5.1501 \mu \mathrm{H}, 0.1866$</tex>, and 96.65 % at 9.855 cm when the receiver coil's varying radius causes misalignment. At 189.071, the Q-factor is also rather high. The effect of flux density and magnetic field strength is calculated with the best value at a 6.46 cm radius and a maximum value of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$48 ~\mathrm{A} / \mathrm{m}$</tex> and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$56 \mu$</tex> Tesla.