Coil Geometry Optimization for Wireless Power Delivery to Moving Receivers

Wireless power transfer systems have conventionally been modeled and optimized in static configurations, with immobile receivers and transmitters. However, many real-world use cases are not well addressed by this simplified model. In this work, the case of a moving receiver is explored, and transmit coil geometry is optimized for this special case. The optimal design is based on the velocity of the receiver, energy required by the load, Tx-Rx distance, and maximum receiver size. Simplified equations and design procedures are described and analyzed. Coils and receiver hardware are implemented and validate the design. The Tx-Rx ratio of the implemented coil system is 10.8:1 with a 4.5cm receiver coil.