Detection device, power reception device, power transmission device and non-contact power supply system
First Claim
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1. A power transmitting device comprising:
- a resonance circuit that includes a power transmitting coil; and
circuitry configured to measure a resistance value of the resonance circuit and to compare the measured resistance value with a threshold resistance value to determine whether or not a foreign substance is in a vicinity of the power transmitting coil,wherein the threshold resistance value is set in a case of only the power transmitting device.
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Abstract
A detection device, including: one or a plurality of magnetic coupling elements configured to have one or a plurality of coils; and a detection unit that measures or calculates an effective resistance values of the magnetic coupling elements or an effective resistance value of a circuit including at least the magnetic coupling elements and determines a presence or absence of a foreign substance based on a change in the effective resistance value.
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Citations
23 Claims
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1. A power transmitting device comprising:
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a resonance circuit that includes a power transmitting coil; and circuitry configured to measure a resistance value of the resonance circuit and to compare the measured resistance value with a threshold resistance value to determine whether or not a foreign substance is in a vicinity of the power transmitting coil, wherein the threshold resistance value is set in a case of only the power transmitting device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A power transmitting system comprising:
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a power receiving device including a power receiving coil configured to receive power from a power transmitting coil, a power transmitting device including a resonance circuit that includes the power transmitting coil, and circuitry configured to measure a resistance value of the resonance circuit and to compare the measured resistance value with a threshold resistance value to determine whether or not a foreign substance is in a vicinity of the power transmitting coil, wherein the threshold resistance value is set in a case of only the power transmitting device. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification