Random Beamforming for Multi-Coil Magnetic Resonance Wireless Power Transfer System

Abstract

Magnetic beamforming can effectively increase the power transmission efficiency for multi-coil magnetic resonance wireless power transfer (WPT) system. However, the current beamforming schemes need complicated circuits and communication protocols. In this paper, we propose a random magnetic beamforming method to achieve maximum received power. This scheme is computationally light and requires only limited feedback information. Then, a test-bed for magnetic resonance WPT is developed. The experimental results indicate that our algorithm can effectively increase the received power with a fast convergence rate.