FIELD: electrical engineering.
SUBSTANCE: power supply equipment and power receipt device include the primary and secondary autoresonant coils which resonate through electromagnetic field in order to supply power from power supply equipment to the receipt device by a non-contact method. Control device control high-frequency power supply device so that power supply from the first autoresonant coil is controlled to the second autoresonant coil. The control device evaluates distance between the first and the second autoresonant coils (60) against S-parameter S11 that changes with change of distance between the first and the second autoresonant coils (60) and controls power supply on the basis of this evaluated distance.
EFFECT: increase of power and distance of supply.
21 cl, 11 dwg
