Wireless power apparatus and wireless power-receiving method
AssigneeFujitsu Limited
InventorSatoshi SHIMOKAWA
Life of this patent
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Abstract
A wireless power apparatus includes: a power receiver coil which receives power, as magnetic field energy, from a power transmitter coil by magnetic field resonance produced between the power transmitter coil and the power receiver coil; a power pickup coil which derives power from the power receiver coil by electromagnetic induction; a detector which detects current flowing through the power pickup coil; and a controller which controls a coupling strength between the power pickup coil and the power receiver coil based on the current detected by the detector.
Claims12
A wireless power apparatus comprising:
- a power receiver coil which receives power, as magnetic field energy, from a power transmitter coil by magnetic field resonance produced between the power transmitter coil and the power receiver coil;
- a power pickup coil which derives power from the power receiver coil by electromagnetic induction;
- a detector which detects current flowing through the power pickup coil;
- and
- a controller which controls a coupling strength between the power pickup coil and the power receiver coil based on the current detected by the detector.
A wireless power-receiving method comprising:
- supplying power, as magnetic field energy, to a power receiver coil from a power transmitter coil by use of magnetic field resonance produced between the power transmitter coil and the power receiver coil;
- deriving power from the power receiver coil to the power pickup coil by electromagnetic induction;
- detecting current flowing through the power pickup coil;
- and
- controlling a coupling strength between the power pickup coil and the power receiver coil based on amplitude of the current detected by the detector.
Dependencies are inferred from the claim text.