CONTACTLESS POWER SOURCING EQUIPMENT AND CONTACTLESS POWER SOURCING SYSTEM

Electric power feeding equipment (1) and an electric power receiving device (2) include a primary self resonant coil (30) and a secondary self resonant coil (60), respectively, resonating through an electromagnetic field to allow the electric power feeding equipment (1) to feed the electric power receiving device (2) with electric power in a non-contact manner. A control device (40) sets a frequency range for a spread spectrum, as based on an S-parameter S21 of a circuit constituted of the primary coil (20) and primary self resonant coil (30) of the electric power feeding equipment (1) and the secondary self resonant coil (60) and secondary coil (70) of the electric power receiving device (2), and controls a high frequency electric power supply device (10) to supply the electric power receiving device (2) with high frequency electric power having the set frequency range.