Power supply system and method of controlling power supply system

A power supply system comprising:

• a power supply coil that is supplied with power from a power supply unit;
• a power supply-side resonance coil that is supplied with power from the power supply coil in a non-contact manner;
• a power receiving-side resonance coil that is supplied with power from the power supply-side resonance coil in a non-contact manner;
• a power receiving coil that is supplied with power from the power receiving-side resonance coil in a non-contact manner;
• and
• an adjustment unit that makes shorter at least one of a distance between the power supply coil and the power supply-side resonance coil and a distance between the power receiving coil and the power receiving-side resonance coil when a distance between the power supply-side resonance coil and the power receiving-side resonance coil is short, as compared to when the distance between the power supply side-side resonance coil and the power receiving-side resonance coil is long.

A power receiving device comprising:

• a power receiving-side resonance coil that is supplied with power from a power supply-side resonance coil at a power supply device in a non-contact manner;
• a power receiving coil that is supplied with power from the power receiving-side resonance coil in a non-contact manner;
• and
• an adjustment unit that adjusts a distance between the power receiving coil and the power receiving-side resonance coil on the basis of a distance between the power supply-side resonance coil and the power receiving-side resonance coil.

A power receiving device comprising:

• a power receiving-side resonance coil that is supplied with power from a power supply-side resonance coil at a power supply device in a non-contact manner;
• a power receiving coil that is supplied with power from the power receiving-side resonance coil in a non-contact manner;
• and
• an adjustment unit that makes shorter a distance between the power receiving coil and the power receiving-side resonance coil when a distance between the power supply-side resonance coil and the power receiving-side resonance coil is short, as compared to when the distance between the power supply side-side resonance coil and the power receiving-side resonance coil is long.

A power supply device comprising:

• a power supply coil that is supplied with power from a power supply unit;
• a power supply-side resonance coil that is supplied with power from the power supply coil in a non-contact manner and supplies power to a power receiving-side resonance coil at a receiving device in a non-contact manner;
• and
• an adjustment unit that adjusts a distance between the power supply coil and the power supply-side resonance coil on the basis of a distance between the power supply-side resonance coil and the power receiving-side resonance coil.

A power supply device comprising:

• a power supply coil that is supplied with power from a power supply unit;
• a power supply-side resonance coil that is supplied with power from the power supply coil in a non-contact manner and supplies power to a power receiving-side resonance coil at a receiving device in a non-contact manner;
• and
• an adjustment unit that makes shorter a distance between the power supply coil and the power supply-side resonance coil when a distance between the power supply-side resonance coil and the power receiving-side resonance coil is short, as compared to when the distance between the power supply-side resonance coil and the power receiving-side resonance coil is long.

A method of controlling a power supply system comprising:

• supplying power to a power supply coil from a power unit;
• supplying power to a power supply-side resonance coil from the power supply coil in a non-contact manner;
• supplying power to a power receiving-side resonance coil from the power supply-side resonance coil in a non-contact manner;
• supplying power to a power receiving coil from the power receiving-side resonance coil in a non-contact manner;
• and
• adjusting at least one of a distance between the power supply coil and the power supply-side resonance coil and a distance between the power receiving coil and the power receiving-side resonance coil on the basis of a distance between the power supply-side resonance coil and the power receiving-side resonance coil.