This paper presents the design and implementation of an inductive coupling wireless power transfer (WPT) system for electric vehicles (EVs). The study aims to enhance the coupling coefficient and efficiency of a previously designed WPT system. A 3D Maxwell model was created to analyze the impact of four parameters—ferrite coating thickness, number of coil windings, coil radii, and distance between windings—on the coupling coefficient. The optimal parameters were determined, resulting in a higher coupling coefficient of 0.2671 and an efficiency of 81.4%. The system's performance was evaluated using Simplorer circuit simulations and experimental results. Both the output power and efficiency increased with higher load resistance. The study highlights the importance of parameter optimization in improving WPT system performance and provides valuable insights for future research on WPT systems for EVs.This paper presents the design and implementation of an inductive coupling wireless power transfer (WPT) system for electric vehicles (EVs). The study aims to enhance the coupling coefficient and efficiency of a previously designed WPT system. A 3D Maxwell model was created to analyze the impact of four parameters—ferrite coating thickness, number of coil windings, coil radii, and distance between windings—on the coupling coefficient. The optimal parameters were determined, resulting in a higher coupling coefficient of 0.2671 and an efficiency of 81.4%. The system's performance was evaluated using Simplorer circuit simulations and experimental results. Both the output power and efficiency increased with higher load resistance. The study highlights the importance of parameter optimization in improving WPT system performance and provides valuable insights for future research on WPT systems for EVs.