Smart Multi-Coil-based Magnetic Resonance Prototype for Wireless Power Transfer

Magnetic resonance is a promising technique of far-field wireless power transfer for consumer electronic devices due to its high efficiency and long charging distance. In this paper, we present a smart multi-coil array magnetic resonance charging prototype which can integrate several intelligent functions and charge multiple devices simultaneously with high efficiency. In this platform, magnetic beamforming, impedance matching network and receiver position estimation are implemented on this platform. With these schemes, the received power and transfer efficiency are increased effectively. The experimental results indicate that our platform can effectively charge a device in 20cm with above 90% transmission efficiency.