Non-contact electric power feeding apparatus, non-contact electric power receiving apparatus, non-contact electric power feeding method, non-contact electric power receiving method and non-contact electric power feeding system

摘要

Disclosed herein is a noncontact electric power feeding apparatus (1), including: a resonance element (14) for supplying an alternative current electric power in a noncontact style in accordance with a resonance; an alternative current power source portion (11) configured to generate an alternative current electric power to be supplied to said resonance element (14); and impedance adjusting portion (15) provided between said alternative current power source portion (11) and said resonance element (14) and configured to variably control an impedance in accordance with a coupling coefficient (16) between said noncontact electric power feeding apparatus (1) and an electric power feeding destination (2) of the alternative current electric power.