Design And Implementation Of Class-E Amplifier For Magnetically-coupled Resonant Wireless Power Transfer System

Latitude ordered the circuit traces works for those electronic products brought to mankind a convenient for human,that metal wires and other connectors for the transmission of energy necessary to keep working condition.However,by way of power transmission conductors poor security,lack of reliability.How to avoid the circumstance plagued researchers for a long period.Magnetically coupled resonance wireless power transmission technology is a class of wireless power transmission.The technology owns lots of advantage,such as high transmission efficiency,moderate transmission distance and small environmental harm.Therefore,the technology was once rated as the most promising new technologies.This paper describes common wireless power transmission technology and reviews for domestic and magnetically coupled wireless power transmission technology in the field of research status.Based on the physical basis of the magnetic coupling wireless power transmission technology,the paper summarized its transmission principle.Then we discuss the Circuit theory and coupled-mode theory,building analysis model,summarizing common transmission power and transmission efficiency of the wireless power transmission system of expression to explore similarities between models.Next,select the series-in-line circuit as a basic research model and related factor on the transmission characteristics of the system to demonstrate the role of law analysis,including the resonant frequency,the load resistance,the coupling coefficient,loop resistance.Secondly,we complete magnetically coupled resonance wireless power transmission system and hardware platform,comprising a double-barreled Class E inverter module,rectifier voltage regulator module,the resonant coil design.During this period,especially the double-barreled argument class E inverter compared to the other inverters application advantages.Pspice simulation system based on the overall analysis to verify correctness of the design.Finally,based on the system hardware design,In order to verify the correctness of theoretical analysis,the paper experiments the transmission characteristics of the system and the experimental results agree well with the theoretical analysis.At the resonant frequency 166KHZ,and the coil diameter 10cm,the maximum transmission distance of up to 45 cm.In addition,when the sending and receiving coil spacing 10 cm,the transmission system has a maximum efficiency of 90%,and output power up to 40W.When exploring magnetically coupled resonance wireless power transmission technology used in mobile phones wireless charging,overall efficiency of 84%,indicating the feasibility of the application of mobile technology in the field of wireless charging.