Leakage Magnetic Field Reduction Method using High Q Multiple Resonant Reactive Loop Shielding in Three-phase Resonant WPT Charger for Drone

Wireless power transfer (WPT) technology using magnetic field can transfer power to battery for drone without any electrical contact. In spite of the great advantages of the technology, WPT system generates strong electromagnetic fields (EMFs), which can cause interference on other electrical devices embedded in the drone. In this paper, we propose a three-phase resonant WPT charger for wirelessly charging drones that operate at 60 kHz. Furthermore, high Q multiple resonant reactive loop (MRRL) shielding is proposed for EMF reduction. The magnetic field simulation results obtained using FEA simulation prove that the high Q reactive loop shielding can reduce the fundamental magnetic field harmonics by 0.513mG at the observation point.