Power transmission control device, power transmitting device, non-contact power transmission system, electronic instrument, and power transmission control method

A non-contact power transmission system comprising a power transmitting device and a power receiving device, the non-contact power transmission system performing non-contact power transmission from the power transmitting device to the power receiving device via a primary coil and a secondary coil that are electromagnetically coupled,

• the power transmitting device including a power-transmitting-side control circuit that controls power transmission to the power receiving device based on an induced voltage in the primary coil;
• the power receiving device including a power supply control section that controls power supply to a load, and a power reception control device that includes a power-receiving-side control circuit that controls the power receiving device;
• and
• the power-transmitting-side control circuit of the power transmitting device causing the power transmitting device to perform intermittent temporary power transmission,
• the power receiving device that has received the power due to 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 succeed,
• 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.

A power transmission control method that controls power transmission from a power transmitting device to a power receiving device, the method comprising:

• causing the power transmitting device to perform intermittent temporary power transmission;
• causing the power receiving device that has received the intermittent temporary power transmission to perform position detection that checks whether or not a power-receiving-side instrument that includes the power receiving device is placed at an appropriate position,
• causing the power receiving device to transmit an ID authentication frame to the power transmitting device when the power-receiving-side instrument is placed at the appropriate position;
• causing the power transmitting device to perform an ID authentication process based on the ID authentication frame and to transmit 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;
• 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;
• causing the power receiving device to check the permission frame and to transmit a start frame to the power transmitting device to start continuous normal power transmission;
• and
• causing the power transmitting device to perform the continuous normal power transmission to the power receiving device when the start frame has been detected.