NON-CONTACT ELECTRIC POWER FEEDING DEVICE

A non-contact power feeding device A is provided to feed power from a primary coil 7 on a primary side 1 to a secondary coil 8 on a secondary side 2, which are closely located to face each other with no contact through an air gap g, based on a mutual induction effect of electromagnetic induction. In such a non-contact power feeding device A, a repeating resonant coil 30 constituting a resonant circuit 29 is disposed in a magnetic path of the air gap g. This resonant circuit 29 is independent of a power circuit 12 on the primary side 1 and a load side circuit 24 on the secondary side 2 and is provided with the repeating resonant coil 30 and a capacitor 31. In the case of power feeding, the repeating resonant coil 30 of the resonant circuit 29 feeds exciting reactive power to the magnetic path of the air gap g.