Magnetic field levels in drones equipped with Wireless Power Transfer technology

A Wireless Power Transfer (WPT) system based on magnetic resonant coupling is applied to a small electrical Unmanned Aerial Vehicle (UAV) to recharge its battery. The transmitting coil is assumed to be on a terrestrial base station, while the receiving coil is onboard. The operation frequency is fixed to 150 kHz. Key aspects for this kind of application are the reduction of the weight of the onboard WPT system while maintaining high WPT efficiency and avoiding EMC/EMI problems on the drone electronic system. In this study, the feasibility of the WPT charging system applied to a demonstrative drone has been proved.