POWER FEEDING APPARATUS, POWER RECEIVING APPARATUS, POWER FEEDING SYSTEM, AND METHOD OF CONTROLLING POWER FEEDING
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Accused Products
Abstract
A power feeding apparatus is provided. The power feeding apparatus includes a power feeding unit configured to supply electric power to a power receiving apparatus through a magnetic field; a measuring unit configured to measure an electric characteristic value and to generate a measurement value; a power receiving unit configured to provide a set value; and a foreign substance detection unit configured to detect a foreign substance in the magnetic field based on the set value and the measurement value. A power receiving apparatus, a power feeding system, and a method of controlling power feeding are also provided.
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Citations
48 Claims
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1-19. -19. (canceled)
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20. A power transmitting device comprising:
circuitry configured to; electronically perform a measurement on a resonance circuit to obtain a quality factor of the resonance circuit, electronically use a reference value from a power receiving device to obtain a threshold value, and electronically use the quality factor and the threshold value to detect an absence of a foreign object in a magnetic field or a presence of the foreign object in the magnetic field. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A power receiving device comprising:
circuitry configured to receive a request for a foreign object detection from a power transmitting device and send a reference value to the power transmitting device based on the request for the foreign object detection. - View Dependent Claims (31, 32)
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33. A power system comprising:
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a power transmitting device that has a resonance circuit, the power transmitting device is configured to obtain a quality factor of the resonance circuit; and a power receiving device configured to output a reference value, the power transmitting device is configured to use the reference value to obtain a threshold value, wherein the power transmitting device is configured to use the quality factor and the threshold value to detect an absence of a foreign object in a magnetic field or a presence of the foreign object in the magnetic field. - View Dependent Claims (34, 35, 36, 37)
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38. A power transmitting method comprising:
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performing a measurement on a resonance circuit to obtain a quality factor of the resonance circuit; receiving a reference value from a power receiving device; using the reference value to determine a threshold value; and using the quality factor and the threshold value to detect an absence of a foreign object in a magnetic field or a presence of the foreign object in the magnetic field. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification