This paper proposes a high-efficiency wireless power transfer system with an asymmetric
four-coil resonator. It presents a theoretical analysis, an optimal design method, and
experimental results. Multicoil systems which have more than three coils between the
primary and secondary side provide the benefits of a good coupling coefficient, a long
transfer distance, and a wide operating frequency range. The conventional four-coil system
has a symmetric coil configuration. In the primary side, there are source and transmitter coils …

This paper proposes a high efficiency wireless power transfer system with an asymmetric 4-
coil resonator. It presents a theoretical analysis, an optimal design method, and
experimental results. Multi-coil systems which have more than three coils between the
primary and secondary side provide the benefits of a good coupling coefficient, a long
transfer distance, and a wide operating frequency range. The conventional 4-coil system has
a symmetric coil configuration. In the primary side, there are source and transmitter coils …