Modeling And Analysis Of Resonant Wireless Transmission System Based On Class E Inverter

Magnetic Coupled Resonant Wireless Power Transfer technology(MCR-WPT)has a lot of advantages such as middle transfer distance,higher efficiency,relatively large output power,non-radiation characteristics and a low sense of misplace.In that case,this technology gets great concerns by scholars all over the world.Due to its simple structure and high system efficiency,Class E inverter is widely used in resonant radio power transmission system.But at present,most modeling works of the wireless energy transmission system usually ignores the circuit parameters of inverter,which is regard as AC power supply.Besides,there are less works on the modeling and analysis of inverters operating at the soft switching operating point is relatively less.As a result,the influence of circuit parameters on the MCR-WPT system performance cannot be accurately analyzed.Therefore,establishing accurate mathematical model of Resonant WPT System with Class E Inverter has great significance for both parameter design and performance improvement.By comparing some modeling methods current in use,A scheme based on the equivalent small parameter method(ESPM)is proposed for analyzing the MCR-WPT System with a Class E Inverter.This thesis mainly completed the following works.(1)The mathematical model of the the Class E inverter is established and sloved by ESPM.The parameters of the Class E inverter are desiged based on steady periodic solution,which are tested under different situations with simulation.(2)Under different parameters of MCR-WPT System with Class E Inverter,compare the proposed scheme results with the generalized space averaging method results,and the results indicate that the proposed scheme is more advantageous.According to the design of the optimal parameters and periodic solution of the proposed scheme,the influence of choke inductance,on-resistance,coupling coefficient and load parameters on the power and efficiency of the MCR-WPT system and the stability of the system is analyzed.(3)The experimental platform is built to verify the correctness of the theoretical analysis and control strategy.The experiment results agree with the analysis results,which indicate that the proposed scheme is valid.