Coil Design And Research Based On Magnetically Coupled Resonant Wireless Energy Transfer System

The popularity of intelligent electronic devices and products,more and more people need these electronic products in their life.But excessive power consumed in short time,so it need to be charged at any time,which brings inconvenience and trouble in daily life.The wireless power transfer can solve these problems and it have bring many unexpected results in production and life.At present,there are three kinds of wireless power transfer technologies,which are microwave radiation wireless power transfer,electromagnetic induction wireless power transfer,magnetically coupled resonant wireless power transfer.The magnetically coupled resonant wireless power transfer is a new type of wireless power transfer technology,compared with the other two kinds of wireless power transfer technology,which has the transfer distance moderate,the transmission efficiency moderate,the transfer power moderate,harmless to human and environment.So the magnetically coupled resonant wireless power transfer,which have important economy and society value.This paper focuses on the coils of magnetically coupled resonant wireless power transfer,and a new structure of planar microstrip is proposed,which make the magnetically coupled resonant wireless power transfer from the typical four coils space structure into planar structure,reduce the occupied space.The circuit model of planar microstrip structure is established,and the on-chip spiral microstrip line is analyzed and discussed.Based on the above assumptions,the model of planar microstrip structure is established in HFSS 13.In order to keep the transmission efficiency stable,the frequency matching method is introduced to keep the transmission efficiency at an acceptable level.Finally,as the planar microstrip meet axial symmetry to make efficiency best,the planar microstrip structure can’t the requirement of energy omnidirectional transfer,In order to solve the problem of directional transmission,a new structure proposed based on planar microstrip,by increasing the number of transmitter to achieve the purpose of energy omnidirectional transmission,and the model simulated in HFSS 13.0.