New coil shape to expand the charging area in a wireless power transmission system

This paper investigates the shape of a power supply coil which can expand a charging area in a magnetic resonance power transmission system. It is well known that the charging area becomes large when the diameter of the coil is large. However, the system becomes large in size and the degrees of freedom in arrangement are restricted. This paper proposes a new coil shape “hat-shape coil” which can enlarge the charging area effectively.