The Research Of Multi-source Wireless Power Transfer System

With more and more electronic devices supporting the wireless charging,the conventional Single-Input-Single-Output(SISO)charging can't serve as a public infrastructure for wireless charging in various scenarios,such as airports,restaurants,and stations,etc..As a consequence,the wireless charging system supporting multiple loads has become a topical issue.Compared with SISO systems,Multiple-Input-Single-Output(MISO)systems are more well-suitable in multiple-loads charging and its performance is robust in the case of receiver misalignment.This thesis investigates the optimal power control of MISO magnetic resonance wireless power transfer(WPT)system and the synthesis of its corresponding transmitter array.As a result,a wireless charging system design that satisfies the multiple-loads at arbitrary locations is proposed.Firstly,the equivalent circuit and the mathematical model of the multi-transmitter WPT system are established.The parameters of the equivalent circuit are extracted using the method of moments,which lays the foundation for subsequent system design and optimization.Secondly,aiming at the design requirements of multiple-loads charging and receiver position arbitrariness,the modeling and joint optimization of voltage control strategy and transmitter array are elaborated.The four-transmitters WPT system is simulated,fabricated and tested.The results show that the voltage control strategy proposed in the thesis is beneficial to power receiving for multiple loads,and the optimization of the layout of the transmitter array realize more efficient charging at any location.