Patent ID: 8803364

Claim:
A power transmission control device provided in a power transmitting device of a non-contact power transmission system, the non-contact power transmission system performing non-contact power transmission from the power transmitting device to a power receiving device via a primary coil and a secondary coil that are electromagnetically coupled, the power transmission control device comprising: a power-transmitting-side control circuit that controls power transmission to the power receiving device, the power-transmitting-side control circuit causing the power transmitting device to perform intermittent temporary power transmission, the power receiving device that has received the temporary power transmission performing position detection that checks whether or not a power-receiving-side instrument that includes the power receiving device is placed at an appropriate position, the power receiving device transmitting an ID authentication frame to the power transmitting device when the power-receiving-side instrument is placed at the appropriate position, the power-transmitting-side control circuit performing an ID authentication process based on the ID authentication frame and transmitting a permission frame to the power receiving device when the ID authentication frame has been detected within a given period of time after the intermittent temporary power transmission and the ID authentication has succeeded, the power-transmitting-side control circuit causing the power transmitting device to continuously perform the intermittent temporary power transmission when the ID authentication frame has not been detected within the given period of time after the intermittent temporary power transmission, the power receiving device checking the permission frame and transmitting a start frame to the power transmitting device to start continuous normal power transmission, the power-transmitting-side control circuit causing the power transmitting device to perform the continuous normal power transmission to the power receiving device when the start frame has been detected.