A Method for Maximizing Transmission Power in Omnidirectional Wireless Power Transfer Based on Particle Swarm Optimization

Currently, few theoretical analysis models focus on irregularly shaped receiving coil structures in the wireless power transfer field. On this basis, this paper conducts a theoretical analysis of the issues related to load posture angles and irregularly shaped receiving coil structures. It proposes an optimization method for a full-range, all-attitude spatial wireless power transfer system based on the particle swarm optimization algorithm. Firstly, a three-coil orthogonal spherical structure is used at both the transmitter and receiver end to realize full-space energy transfer. Secondly, the realization method proposed in this paper is not limited by the specific structure and attitude angle of the receiving end and can realize wireless energy transmission in space under general environments. Moreover, it does not impose restrictions on the number of receiving coils, making it applicable to models with multiple receiving coils. Finally, an experimental prototype with a transmission distance of 40cm and transmission power of 4W was constructed to validate the above theory. The experimental results show that the system can accurately achieve spatial positioning of the load and enable omnidirectional WPT. Furthermore, the system's control optimization theory can serve as a theoretical reference for other multi-load or irregular-load systems.