Patent ID: 8143745

Claim:
A power transmission control device provided in a power transmission device included in a contactless power transmission system that transmits power by electromagnetically coupling a primary coil and a secondary coil from the power transmission device to a power receiving device so as to supply the power to a load on the power receiving device, the power transmission control device comprising: a controller that controls the power transmission control device; and a register section, the register section including: a power receiving side information register that stores power receiving side information received from the power receiving device; the power receiving side information register including a power receiving side transmission condition information register that stores power receiving side transmission condition information received from the power receiving device, and a power transmission side information register that stores power transmission side information, the power transmission side information register including a power transmission side transmission condition information register that stores power transmission side transmission condition information, wherein the controller performs at least one of: an authentication processing of the power receiving device; a power transmission control of the contactless power transmission; and a communication processing between the power transmission device and the power receiving device based on the power receiving side information stored in the power receiving side information register and the power transmission side information stored in the power transmission side register, and wherein before a start of normal power transmission, the controller performs the power transmission control based on the power transmission side transmission condition information stored in the power transmission side transmission condition information register while after the start of the normal power transmission, the controller performs the power transmission control based on the power receiving side transmission condition information stored in the power receiving side transmission condition information register.