Wireless electric power supply method and wireless electric power supply apparatus

A wireless electric power supply apparatus comprising:

• a power supply section configured to supply electric power at a resonance frequency which causes magnetic field resonance;
• a power-transmission resonance coil configured to transmit the electric power, supplied from the power supply section, as magnetic field energy by using the magnetic field resonance, the power-transmission resonance coil being capable of being in magnetic field resonance with a power-reception resonance coil at the resonance frequency;
• the power-reception resonance coil being configured to receive the magnetic field energy, transmitted from the power-transmission resonance coil, by using the magnetic field resonance, the power-reception resonance coil being capable of being in magnetic field resonance with the power-transmission resonance coil at the resonance frequency;
• a power reception section configured to output, as electric power, the magnetic field energy received by the power-reception resonance coil;
• a store section configured to store characteristics data indicating the characteristics of the electric power supply;
• a monitor section configured to monitor the electric power supply;
• a comparison section configured to compare the monitoring result obtained by the monitor section with the characteristics data indicating the characteristics of the electric power supply performed by the power supply section;
• and
• a control section configured to control the electric power supply, performed by the power supply section, on the basis of the comparison result obtained by the comparison section.

A wireless electric power supply apparatus comprising:

• a power supply section configured to supply electric power at a resonance frequency which causes magnetic field resonance;
• a power-transmission resonance coil configured to transmit the electric power, supplied from the power supply section, as magnetic field energy by using the magnetic field resonance, the power-transmission resonance coil being capable of being in magnetic field resonance with a power-reception resonance coil at the resonance frequency;
• a control section configured to cause the power-transmission resonance coil to be supplied with electric power at a plurality of frequencies;
• a monitor section configured to monitor characteristics of the power-transmission resonance coil, the characteristics arising when the power-transmission resonance coil is supplied with electric power at the plurality of frequencies;
• a store section configured to store characteristics data indicating the characteristics of the power-transmission resonance coil, the characteristics data corresponding to the plurality of frequencies;
• a comparison section configured to compare the characteristics result obtained by the monitor section with the characteristics data stored in the store section;
• and
• a control section configured to control the electric power supply, performed by the power supply section, on the basis of the comparison result obtained by the comparison section.