Enhancing Wireless Charging for Electric Vehicles: A Comparative Study of Coil Designs and Their Impact on Power Transfer Efficiency

This study investigates the impact of various coil designs on wireless charging efficiency for electric vehicles using inductive coupling. Examining both transmitting and receiving coils, we focus on factors like number of turns, coil shapes (square, rectangular, DD, DDQ), air gap length, operation frequency, and coil material properties. Our analysis reveals each design's strengths and weaknesses, emphasizing the need for a balanced consideration of all variables to optimize power transfer efficiency. We do not conclusively favor one design over another but highlight the importance of comprehensive evaluation to develop efficient wireless charging solutions, addressing a critical technological challenge in EV infrastructure.