Transmitting Coil Array Optimization for Wireless Power Transfer

A 10 cm by 10 cm transmitting coil is designed for an inductive power transfer system 5×5 coil array. The coil is a spiral coil, and the transmitting coil has the same size as the receiving coil, and the geometry of transmitting coil is optimized to ensure an even magnetic field distribution on the receiving side. Define the disturbance of magnetic field in a certain transmitting area, and the optimization is to enlarge the transmitting area at the same disturbance, by optimizing the transmitting coil structure. As a result, the optimization shows 7.35 % uniformity rise from original coil. This uniformity guarantees a uniform power delivery regardless of the position of the receiving side.