Power transmission apparatus wirelessly transmitting power to power receiving apparatus
First Claim
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1. A power transmission apparatus comprising:
- a power transmission circuit configured to wirelessly transmit power to an electronic device;
a foreign substance detection circuit configured to detect a foreign substance affecting power transmission performed by the power transmission circuit;
a loop shaped power transmission antenna serving as an antenna for the power transmission circuit transmitting power to the electronic device; and
a foreign substance detection antenna for the foreign substance detection circuit detecting the foreign substance,wherein the foreign substance detection antenna is arranged at a predetermined distance or more from the power transmission antenna in a vertical direction to a loop direction of the power transmission antenna, andwherein the predetermined distance is a distance at which a magnetic field intensity in a range in which the power transmission antenna is arranged falls within 15% from an average magnetic field intensity of the range.
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Abstract
A power transmission apparatus includes a power transmission unit that wirelessly transmits power to an electronic device, a foreign substance detection unit that detects a foreign substance affecting power transmission performed by the power transmission unit, a loop shaped power transmission antenna serving as an antenna for the power transmission unit transmitting power to the electronic device, and a foreign substance detection antenna for the foreign substance detection unit detecting the foreign substance, wherein the foreign substance detection antenna is arranged at a predetermined distance or more from the power transmission antenna in a vertical direction to a loop direction of the power transmission antenna.
22 Citations
10 Claims
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1. A power transmission apparatus comprising:
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a power transmission circuit configured to wirelessly transmit power to an electronic device; a foreign substance detection circuit configured to detect a foreign substance affecting power transmission performed by the power transmission circuit; a loop shaped power transmission antenna serving as an antenna for the power transmission circuit transmitting power to the electronic device; and a foreign substance detection antenna for the foreign substance detection circuit detecting the foreign substance, wherein the foreign substance detection antenna is arranged at a predetermined distance or more from the power transmission antenna in a vertical direction to a loop direction of the power transmission antenna, and wherein the predetermined distance is a distance at which a magnetic field intensity in a range in which the power transmission antenna is arranged falls within 15% from an average magnetic field intensity of the range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A control method for a power transmission apparatus having a power transmission unit, a foreign substance detection unit, a loop shaped power transmission antenna serving as an antenna for the power transmission unit, and a foreign substance detection antenna for the foreign substance detection unit, the method comprising:
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wirelessly transmitting power to an electronic device by the power transmission unit; detecting, by the foreign substance detection unit, a foreign substance affecting power transmission performed by the power transmission unit; transmitting power to the electronic device via the loop shaped power transmission antenna; and detecting the foreign substance using the foreign substance detection antenna, wherein the foreign substance detection antenna is arranged at a predetermined distance or more from the power transmission antenna in a vertical direction to a loop direction of the power transmission antenna, and wherein the predetermined distance is a distance at which a magnetic field intensity in a range in which the power transmission antenna is arranged falls within 15% from an average magnetic field intensity of the range.
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10. A non-transitory computer-readable storage medium storing a program that when executed causes a power transmission apparatus having a power transmission unit, a foreign substance detection unit, a loop shaped power transmission antenna serving as an antenna for the power transmission unit, and a foreign substance detection antenna for the foreign substance detection unit, to perform a control method, the control method comprising:
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wirelessly transmitting power to an electronic device by the power transmission unit; detecting, by the foreign substance detection unit, a foreign substance affecting power transmission performed by the power transmission unit; transmitting power to the electronic device via the loop shaped power transmission antenna; and detecting the foreign substance using the foreign substance detection antenna, wherein the foreign substance detection antenna is arranged at a predetermined distance or more from the power transmission antenna in a vertical direction to a loop direction of the power transmission antenna, and wherein the predetermined distance is a distance at which a magnetic field intensity in a range in which the power transmission antenna is arranged falls within 15% from an average magnetic field intensity of the range.
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Specification
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Current AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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Original AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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InventorsOkamoto, Yoshihiko
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Primary Examiner(s)Sun, Pinping
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Application NumberUS15/353,524Publication NumberTime in Patent Office1,126 DaysField of SearchUS Class CurrentCPC Class CodesH02J 50/10 using inductive couplingH02J 50/60 responsive to the presence ...H02J 7/0042 characterised by the mechan...
