Power feeding apparatus and power feeding system

A power feeding apparatus in a power feeding system, the power feeding system being configured to transmit, in a contactless fashion, electric power from the power feeding apparatus to a power receiving apparatus to which a load is to be coupled, the electric power being transmitted by magnetic coupling, the power feeding apparatus comprising:

• a power feeding resonator;
• a power supply configured to output a high-frequency signal to the power feeding resonator;
• a communicator configured to receive power-receiving-side information from the power receiving apparatus, the power-receiving-side information including information on a distance and information on a current of the load coupled to the power receiving apparatus, the distance being a distance between the power feeding apparatus and the power receiving apparatus and relating to the magnetic coupling;
• and
• a controller configured to perform, on the power supply, a control of the high-frequency signal on a basis of the power-receiving-side information received by the communicator, after starting of the output of the high-frequency signal by the power supply.

A power feeding system configured to transmit, in a contactless fashion, electric power by magnetic coupling, the power feeding system comprising:

• a power feeding apparatus configured to transmit the electric power;
• and
• a power receiving apparatus to which a load is to be coupled, and configured to receive the electric power transmitted from the power feeding apparatus,
• the power receiving apparatus including
• a power receiving resonator,
• a detector configured to perform a detection of at least a voltage between the voltage and a current of the load coupled to the power receiving apparatus, and
• a first communicator configured to transmit a result of the detection performed by the detector to the power feeding apparatus, and
• the power feeding apparatus including
• a power feeding resonator,
• a power supply configured to output a high-frequency signal to the power feeding resonator,
• a second communicator configured to receive the result of the detection from the first communicator, and
• a controller configured to perform, on the power supply, a control of the high-frequency signal on a basis of the result of the detection received by the second communicator, after starting of the output of the high-frequency signal by the power supply.

A power feeding system configured to transmit, in a contactless fashion, electric power by magnetic coupling, the power feeding system comprising:

• a power feeding apparatus configured to transmit the electric power;
• and
• a power receiving apparatus to which a load is to be coupled, and configured to receive the electric power transmitted from the power feeding apparatus,
• the power receiving apparatus including
• a power receiving resonator,
• a current detector configured to perform a detection of a current of the load coupled to the power receiving apparatus, and
• a first communicator configured to transmit a result of the detection performed by the current detector to the power feeding apparatus, and
• the power feeding apparatus including
• a power feeding resonator,
• a power supply configured to output a high-frequency signal to the power feeding resonator,
• a second communicator configured to receive the result of the detection from the first communicator,
• a distance measuring device configured to measure a distance that is between the power feeding apparatus and the power receiving apparatus and relates to the magnetic coupling, and
• a controller configured to perform, on the power supply, a control of the high-frequency signal on a basis of the distance obtained by the distance measuring device and the result of the detection received by the second communicator, after starting of the output of the high-frequency signal by the power supply.