Comparative Study of Coil Architectures for Wireless Power Transfer

One of the most important technological advancements in contemporary transportation is wireless power transfer or WPT. Numerous methods were developed to achieve and implement it in the automobile sector. During applying multiple WPT techniques, various losses occur when energy is exchanged between the transmitter and receiver coils. These losses, which include coupling loss and flux loss, impact the performance of electric vehicles (EVs). Transporting energy through a coil depends on its size, shape, turns, and composition. A magnetic induction method based on resonance is outlined in this paper for power transmission. This study examines a number of WPT coils found in electric vehicles (EVs), including square, circular, and pentagon-type coils. By altering the air gap distance, the present investigation seeks to find the coupling coefficient (Co-Co) and efficiency to obtain the most effective solution. A resonance frequency of 85 kHz is used for the SAE J2594 standard. The FEM simulation-based result shows a best-optimized coil design that achieves 99% efficiency and a coupling factor greater than 0.2.