This paper mainly studies the distance transmission characteristics of the magnetic resonance wireless power transmission system and methods to improve the transmission distance. The mutual model is used to explain the operation principle of magnetic resonance wireless power transmission system

while the expression between the transfer characteristic and the distance is obtained by theoretical analysis on the system. On this basis

further research aimed to improve the system transmission distance is done. It has been found that there is an optimal distance point in the magnetic resonance wireless power transmission system

and improving the resonance frequency of the system is an effective way to increase transmission distance. Finally

a magnetic resonance wireless power transmission system is set up for experimental verification. The experimental results are in agreement with theoretical analysis. This work is supported by National Natural Science Foundation of China (No. 51077069)

Jiangsu Provincial Natural Science Foundation of China (No. BK2009372) and Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) of China (No. 20103218110013).