Abstract: A composite wireless power feeding system enables a light unit to be replaced under water and includes a wireless charging system including a power feeding coil and a first power feeding circuit unit. The power feeding system includes a power reception and feeding coil, a power feeding circuit unit, a power reception circuit unit, and an energy consumption circuit unit having a power reception coil. The power feeding system includes a battery charged by electromagnetic energy induced in the power reception and feeding coil. The battery is a power source for generating electromagnetic waves in the power reception and feeding coil to induce energy in the power reception coil and thereby power the energy consumption unit.

Abstract: A wireless power feeding system comprising a power feeder and a power receiver including a power reception coil, a power reception circuit unit for recovering energy generated in the power reception coil, and an internal secondary battery for storing energy. Electric energy is supplied from the power feeder to the power receiver by means of electromagnetic induction using a resonance phenomenon. The power receiver has an outer shape identical to that of a conventional battery, and has a power receiver housing accommodating the power reception coil, the power reception circuit unit, and the internal secondary battery. Further, the power receiver has two electrodes disposed in positions identical to those of the conventional battery. Further, the power feeder includes a power feeding base on which the power receiver can be mounted.

Abstract: A system for performing wireless power feeding using an existing electronic device. In the present invention, a power feeder has a power feeding coil. A power receiver has a power receiving coil, a power receiving circuit unit, and a load. Electromagnetic induction using a resonance phenomenon causes the power feeder to supply an electric energy to the power receiver. A switching circuit enables the power feeding coil to periodically repeat turning on (driving state) and turning off (resonant state) of power supply. A resonant frequency of the power receiver is substantially a period combining a time of the driving state and a time of the resonant state. A resonant frequency of the power feeder is substantially a period of the time of the resonant state, and a tuning adjusting circuit performs adjustment of a resonant capacitor and a coil.

Abstract: A system for performing wireless power feeding using an existing electronic device. In the present invention, a power feeder has a power feeding coil. A power receiver has a power receiving coil, a power receiving circuit unit, and a load. Electromagnetic induction using a resonance phenomenon causes the power feeder to supply an electric energy to the power receiver. A switching circuit enables the power feeding coil to periodically repeat turning on (driving state) and turning off (resonant state) of power supply. A resonant frequency of the power receiver is substantially a period combining a time of the driving state and a time of the resonant state. A resonant frequency of the power feeder is substantially a period of the time of the resonant state, and a tuning adjusting circuit performs adjustment of a resonant capacitor and a coil.

Abstract: A wireless power feeding system comprising a power feeder and a power receiver including a power reception coil, a power reception circuit unit for recovering energy generated in the power reception coil, and an internal secondary battery for storing energy. Electric energy is supplied from the power feeder to the power receiver by means of electromagnetic induction using a resonance phenomenon. The power receiver has an outer shape identical to that of a conventional battery, and has a power receiver housing accommodating the power reception coil, the power reception circuit unit, and the internal secondary battery. Further, the power receiver has two electrodes disposed in positions identical to those of the conventional battery. Further, the power feeder includes a power feeding base on which the power receiver can be mounted.