NON-CONTACT POWER TRANSMISSION DEVICE, NON-CONTACT POWER RECEPTION DEVICE AND NON-CONTACT CHARGING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a non-contact power transmission device, a non-contact power reception device and a non-contact charging system, which are capable of preventing deterioration in efficiency even when a coil used in power transmission and a coil used in signal transmission are differently attached.SOLUTION: A primary coil L3 for authentication is disposed so as to be farther separated from a secondary coil L2 than a primary coil L1 for power transmission is. The primary coil L1 for power transmission is disposed between the primary coil L3 for authentication and the secondary coil L2. That means, when the non-contact power transmission device 10 and the non-contact power reception device 20 are disposed at a predetermined positional relation capable of exchanging power, the primary coil L1 for power transmission is disposed overlappingly so as to be sandwiched between the secondary coil L2 and the primary coil L3 for authentication.