Charging device

A charging device configured to perform wireless charging for a terminal device that is placed on a placement part and includes a power reception coil for receiving wirelessly transmitted electric power, the charging device comprising:

• a power transmission coil for charging configured to transmit electric power to the terminal device;
• a driver configured to move the power transmission coil;
• a position detection coil that includes a plurality of coils, and is configured to detect a position of the power reception coil of the terminal device;
• a memory;
• and
• a processor coupled to the memory and configured to supply electric power to the power transmission coil in a state in which the terminal device is not placed on the placement part, to determine that a conductive foreign substance is present on the placement part in a case in which a variation amount of induced voltage generated in the position detection coil in accordance with a magnetic field generated from the power transmission coil is equal to or larger than a predetermined threshold.

A charging device configured to perform wireless charging for a terminal device that is placed on a placement part and includes a power reception coil for receiving wirelessly transmitted electric power, the charging device comprising:

• a power transmission coil for charging configured to transmit electric power to the terminal device;
• a position detection coil that includes a plurality of coils, and is configured to detect a position of the power reception coil of the terminal device;
• a memory;
• and
• a processor coupled to the memory and configured to supply electric power to a first coil among the plurality of coils of the position detection coil in a state in which the terminal device is not placed on the placement part, to determine that a conductive foreign substance is present on the placement part in a case in which a variation amount of induced voltage generated in a second coil different from the first coil among the plurality of coils of the position detection coil in accordance with a magnetic field generated from the first coil is equal to or larger than a predetermined threshold.