With energy issue gradually going prominent, new power sources has been increasingly focused . Under the circumstance that it is an inexorable trend of electric vehicle’s scale development, much attention has always been paid to the issue of battery . However, electric vehicle utilizing wirelesscharging can tackle this issue with the merits of accessibility of power supply, security, reliability and small cubage . In this paper, A wireless power transfer system via magnetic resonance coupled is designed .

In addition, the influence, exerted by battery load access, on the system is analyzed and a scheme which can control and optimize the system power and solve the key issue of battery load access through the adjustment of duty ratio in voltage regulation circuit of the pick-up side is proposed . Moreover, the electromagnetic issue of the charging system, concerned by the public, is researched with the establishment of magnetic simulation model .