Optimal Air-gap of a Magnetic Resonant Inductive Link for Maximum Wireless Power Transfer

Ideal alignment between the transmitting and receiving coil of the resonant inductive link is one of the prime needs in order to maximize power transfer in a resonant inductively coupled wireless power transfer (RIC-WPT) system. Nevertheless, vertical separation gap tolerance between the coils for specific coil dimension is equally important and cannot be ignored. In order to facilitate maximum wireless power transfer in a resonant inductive link, the critical separation air-gap allied with the coil dimension has been explored. The magnetic field analysis corroborated with the experimental investigation unveils an optimal coil separation distance of a resonant inductive link to uphold maximum power transfer without affecting the system design parameter of a RIC-WPT system used for powering or charging of electrical & electronic appliances.