Comparative Study of Coil Shapes for Electric Vehicle Resonant Wireless Power Transfer System
摘要
The electric vehicle market is proliferating. However, the limited driving range poses a challenge. Though battery technology is improving, charging technology still has a large potential for development. Resonant Wireless Power Transfer systems are increasingly being researched and developed for wireless EV charging, which is safer, quicker, and more convenient. There has been extensive research into WPT technologies to overcome the main challenges: high-power transfer with high efficiency. However, common limiting factors are the large transfer distance and coil misalignment during parking inaccuracies. Hence, this paper provides a study and comparison between four different coil shapes, with respect to these limiting factors. The different coils were designed based on the existing research and parameters were calculated and then simulated across multiple scenarios. This data was studied and compared, using the coupling coefficient as the output variable. The data was plotted, and numerical models of the relationships were derived.