New Method For Maximum Efficiency Control Of Magnetic Coupled Resonant Wireless Power Transfer

The past decade has witnessed a surge of applying wireless power transfer(WPT)techniques,especially,the(magnetically-coupled resonant wireless power transfer,MCR-WPT)which based on the resonant principle,the energy can be transferred efficiently within two objects who have same resonant frequencies,can transfer electrical power from the power supply side to the load side through magnetically-coupled resonance technique.At present,many key technologies need to be improved.The transfer efficiency changes dramatically with the variation of transfer distance.In order to keep the transfer efficiency at the maximum,this paper proposes a searching method to obtain the optimal transfer efficiency.By adjusting the particle number in particle swarm optimization(PSO)algorithm according to a certain law,the proposed method is able to converge quickly and the global optimal frequency is obtained.Simulation and experimental results show that the proposed PSO algorithm can quickly search the resonance frequency where the transfer efficiency is maximal for a certain distance.This paper introduces the background,history and the present development in this field at home and abroad,the related issues are briefly depicts;the application fields and types were introduced,the analysis of MCR-WPT are attained much attention.;Several influencing factors of MCR-WPT are analyzed and presents a controlled method of MCR-WPT maximum transfer efficiency,the methods are verified using MATLAB simulation tools.Finally,this paper designs the experimental platform,which includes signal generator,power amplifier,resonant coils.The design methods of the main components are depicts and the MCR-WPT system is carried out to verify the feasibility of the proposed method.