A novel multi-coil magnetically-coupled resonance array for wireless power transfer system

Abstract

A novel planar resonant coil elements for the 3×3 array in multi-layer structure is proposed for the wireless power transmitter. Both simulation and measurement results reveal that in comparison with the conventional array of transmitter, the power transfer efficiency does not vary significantly when the receiver is moved along the plane parallel to the transmitter from 50mm to 80mm. The power transfer efficiency fluctuates between 57.81% and 64.95% for the measurements at the covering charging area; it indicates the successful establishment of the uniformly charging field desired for a practical wireless power transfer application.