Patent ID: 9716386
Date: 2017-07-25
CPC Classifications: B60L,B60M,H01F,H02J,Y02T

Claim:
1. A contactless power supply system, comprising: a primary coil to be connected to a high-frequency power source; a secondary coil to receive electric power generated from the primary coil; a resonance coil arranged in direct contact with the secondary coil in between the primary coil and the secondary coil; and a rectifier circuit to convert output generated in the secondary coil to direct current, wherein respective planarly-viewed areas of the secondary coil and the resonance coil are equal to or smaller than a planarly-viewed area of the primary coil, the primary coil is formed by planarly and spirally winding a first litz wire, the resonance coil is formed by winding coils in series in a double layer, the coils being formed by planarly and spirally winding a second litz wire, in the case of the secondary coil, two third litz wires are parallelly arranged and planarly and spirally wound, and the contactless power supply system is for charging a battery of a service vehicle moving inside a factory, the primary coil is to be arranged along a lane of the service vehicle, and the secondary coil and the resonance coil are to be mounted on the service vehicle.