Analysis on transmission efficiency of wire- less energy transmission resonator based on magnetic resonance

Abstract

In this paper, a high-effciency wireless energy transmission via magnetic resonance is experimentally implemented in a res- onator with the various sizes of transmitting and receiving coils and the receiving coil having two shapes of rectangular and circular types. The transmission effciency is analyzed by varying the transmission dis- tance. The resonance between the transmitting and receiving coils is achieved with lumped capacitors terminating the coils. The transmis- sion effciency of the resonator consisting of a circular transmitting coil with a diameter of 60 cm and rectangular receiving coil with a one side length of 10 cm is about 80% at the transmission distance of 20 cm. The transmission effciencies of the wireless energy transmission res- onator consisting of a receiving coil with the size of iPhone4 are about 75% and 40% at the transmission distances of 20 cm and 50 cm.