Experimental and usability evaluation of wireless power devices based on the airfuel alliance magnetic resonance standard

Abstract

In the domain of consumer magnetic field wireless power transfer, the two major standards available are the AirFuel Alliance Magnetic Resonance standard developed by the AirFuel Alliance (AFA) and the Qi inductive standard developed by the Wireless Power Consortium. The present work evaluates various AFA-based wireless power devices for consumer electronics. The performed tests include determining the area of nominal power and the 3D charging space for a power receiver unit on the power transmitter unit (PTU), the DC-DC efficiency tests, transmitter and receiver unit temperature tests with and without metallic foreign objects, and leakage magnetic flux density tests.