VARIABLE INDUCTANCE TYPE NON-CONTACT POWER SUPPLY DEVICE

PROBLEM TO BE SOLVED: To provide a variable inductance type non-contact power supply device in which, firstly, degradation of power feeding efficiency is avoided, and secondary, avoidance of degradation of power feeding efficiency can be realized simply and easily.SOLUTION: In a variable inductance type non-contact power supply device A, the electric power is supplied from a primary coil 2 of a primary side circuit 1 to a secondary coil 4 of a secondary side circuit 3 based on the mutual induction in electromagnetic induction, with a corresponding position kept in non-contact manner with an air gap G in between. In order to cope with fluctuation or dislocation of the air gap G between the primary coil 1 and the secondary coil 4, the area of a magnetic core 14 added to the primary coil 1 and the secondary coil 4 can be changed, and the inductance of the primary coil 1 and the secondary coil 4 is variable. The primary side circuit 1 is secured on a ground B side such as a ground surface, a road surface, a floor surface, or the like, and the secondary side circuit 3 is mounted on a moving body side such as a vehicle c or the like. Power feeding is performed by a stationary power feeding method in which the secondary coil 4 is positioned and stopped to correspond to the primary coil 1.