Co-Plane Co-Axial Inductive Coils for Wireless Power Transfer

Abstract

Many attempts have been exposed in designing energy-efficient and reliable wireless power transfer module at low frequency. This wireless power transfer technology is expected to modify the scenario of electrical power distribution for the consumer. A new concept of wireless power transfer coils is proposed to increase the output power capacity. This can be made possible by using coaxial inductive coils, just like a transformer. There will be less air gap in between the transmitter and the receiver coils. Hence, electromagnetic field loss by radiation and fringing effect can be reduced. The angular displacement between the inductive coils is kept to the minimum. In case of the distance between coils, the proposed design will reduce the distance up to 2 times. This design helps reduce magnetic flux waste and improve the electromagnetic energy transfer. Overall system performance and efficiency will be improved, compared to the inductive coils used in conventional wireless power transfer systems. Full 3-D simulations are performed to observe the performance in energy transfer of the proposed co-plane co-axial inductive coils, in terms of its the geometrical configuration.