Power feed system

A power feed system comprising:

• a power feed device;
• and
• a power receiving device,
• wherein the power receiving device comprises:
• a power receiving section that receives power wirelessly from the power feed device with use of a power receiving coil, and
• a first communication section that transmits coil information to the power feed device, the coil information indicating whether or not a coil is provided near the power receiving coil, and
• wherein the power feed device comprises:
• a second communication section that receives, in a case where the second determination is a determination to supply power to the power receiving device, the coil information through starting communication with the first communication section,
• a power feed section that supplies power to the power receiving device with use of a power feed coil,
• a first measuring section that measures, on a basis of a signal at the power feed coil, a first frequency characteristic of a first parameter in a first frequency range, and
• a controller that:
• performs, on a basis of the first frequency characteristic, a second determination as to whether or not to supply power to the power receiving device,
• performs, on a basis of the first frequency characteristic and the coil information, a first determination as to whether or not to supply power to the power receiving device,
• controls an operation of the power feed section on a basis of a result of the first determination, and
• controls an operation of the power feed section on a basis of a result of the second determination.

A power feed system, comprising:

• a power receiving device comprising:
• a power receiving section that receives power wirelessly from the power feed device with use of a power receiving coil, and
• a first communication section that transmits coil information to the power feed device, the coil information indicating whether or not a coil is provided near the power receiving coil,
• a power feed device comprising:
• a second communication section that receives the coil information, and
• a controller that:
• performs, on a basis of the first frequency characteristic and the coil information, a second determination as to whether or not to supply power to the power receiving device, and
• controls the operation of the power feed section on a basis of a result of the second determination.