Design And Analysis Of Magnetically-coupled Resonant Wireless Power Transfer System

Magnetically-coupled resonant wireless power transfer(MCR-WPT)has the advantages of getting rid of the shackles of wire,high transmission efficiency,safety and reliability.In recent years,this technology has rapidly become one of the research focus of researchers at home and abroad.At present,the research of WPT is mainly focused on high-power applications.In this dissertation,the transmission characteristics of MCR-WPT system are deeply studied,and the parameter setting method of LCC is presented,and the simulation and experiment research are carried out.Using this parameter setting method,the output power and security stability of the WPT system can be improved with high transmission efficiency.Firstly,the equivalent circuit of MCR-WPT topology of SS,SP,PS,PP and LCC-LCC types are analyzed by use of mutual inductance model.The applications of five basic compensation topologys are compared.The transmission characteristics of SS and LCC-LCC compensated topologys are analyzed.The influence factors of optimal efficiency optimal power are studied.Secondly,an optimal design method of disc resonators is proposed,which solves the specific resonator design problem under the certain conditions.With the transmission efficiency as the optimization objective,this method considers optimal efficiency load and turns of coils.Under the condition of system resonance,the formula of output power and transmission efficiency is obtained and the parameter setting method is proposed.Finally,the experimental setup based on full-bridge inverter circuit,the compensated topology of SS and LCC,and an optimal design method of disc resonators is built.The transmission characteristics of WPT system and the parameter setting method of LCC are verified experimentally.