Patent ID: 9368274
Filing Date: 2016-06-14
CPC Classification: A01K,H01F,H02J

Claim Text:
1. A resonance-based wireless power transfer system, comprising: a) a load; b) a drive coil array, said drive coil array comprising a number of driver coils, said driver coils injecting RF energy to maintain resonance in the presence of losses and power drawn by the load; c) a transmitter coil array, said transmitter coil array comprising a number of transmitter coils magnetically coupled to said driver coil array, said transmitter coils having at least one resonant frequency and acting as an energy transmitter; d) a receiver coil, said receiver coil having at least one resonant frequency, capturing magnetic field produced by said transmitter coil array, and acting as an energy receiver; and e) a load coil, said load coil being magnetically coupled to said receiver coil for receiving RF energy; wherein: said transmitter coil array and said receiver coil have the same resonant frequency or frequencies, each pair of said driver coil and said transmitter coil forms a voltage step-up transformer to produce a strong resonance for wireless power delivery to said receiver coil within a body, and said load coil is operatively coupled to power said load; said receiver coil is hollow and comprises two end covers and a side wall; said two end covers are connected to each other via said side wall; an inner cavity is formed inside said receiver coil by said two end covers and said side wall; each of said two end covers is a planar spiral coil; said side wall is a helical coil; and said load coil is placed inside said inner cavity and is magnetically coupled to said receiver coil.