Alignment Free Power Transfer System for IoT Devices

Abstract

In this paper, we proposed a magnetic field wireless power transmission antenna using ferrite. In the past, additional grounding enabled magnetic field wireless power transmission, enabling the magnetic field wireless power transmission without additional grounding by using the characteristics of ferrite. Ferrite has the effect of shielding the magnetic field and reduces the leakage power to increase the transmission efficiency. We propose an antenna for magnetic field wireless power transmission using ferrite and confirm that it is transmitted by 5W magnetic field wireless power through experiments. The wireless power transmission proposed in this paper can be applied variously to the Internet of things by the magnetic field wireless power transmission through the metal.