Patent ID: 8369905

Claim:
A power transmission control device provided in a power transmission device included in a contactless power transmission system in which power is transmitted from the power transmission device to a power receiving device by electromagnetically coupling a primary coil and a secondary coil and the power is supplied to a load of the power receiving device, the power transmission control device comprising: a controller that controls the power transmission control device, the controller including: a communication condition setting section that sets a communication condition by exchanging information with the power receiving device, the communication condition being at least one of a communication method between the power transmission device and the power receiving device and a communication parameter; a communication processing section that communicates between the power transmission device and the power receiving device by using the set communication condition; and a negotiation processing section that negotiates contactless power transmission, the negotiation section performing a collation processing on system information showing standard information, coil information, and a load state detection method with respect to the power receiving device.