Apparatus and method for detecting foreign objects in wireless power transmission system
First Claim
1. A wireless power reception apparatus, comprising:
- a secondary coil configured to receive a wireless power from a primary coil included in a wireless power transmission apparatus; and
a power measurement circuit configured to send, to the wireless power transmission apparatus, power information indicative of an amount of power requested by the wireless power reception apparatus,wherein the power measurement circuit of the wireless power reception apparatus is further configured to;
measure one or more measured power values indicative of an amount of power received from the wireless power transmission apparatus after sending the power information indicative of the amount of power requested;
determine that a foreign object has been detected based on a comparison of the amount of power requested and the one or more measured power values; and
inform the wireless power transmission apparatus to stop or suspend the transmission of wireless power in response to determining that the foreign object has been detected.
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Accused Products
Abstract
Aspects of the present invention relate to an apparatus and method for detecting foreign objects in a wireless power transmission system. This specification provides a wireless power reception apparatus for detecting foreign objects, including a power measurement unit for generating required power information indicative of required power for the wireless power reception apparatus, sending the required power information to a wireless power transmission apparatus, and measuring power induced from the wireless power transmission apparatus and a secondary coil for receiving the power induced from the wireless power transmission apparatus. In accordance with the present invention, foreign objects intervened between the wireless power transmission apparatus and the wireless power reception apparatus are recognized, and a user removes the foreign objects. Accordingly, damage to a device attributable to foreign objects can be prevented.
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Citations
7 Claims
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1. A wireless power reception apparatus, comprising:
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a secondary coil configured to receive a wireless power from a primary coil included in a wireless power transmission apparatus; and a power measurement circuit configured to send, to the wireless power transmission apparatus, power information indicative of an amount of power requested by the wireless power reception apparatus, wherein the power measurement circuit of the wireless power reception apparatus is further configured to; measure one or more measured power values indicative of an amount of power received from the wireless power transmission apparatus after sending the power information indicative of the amount of power requested; determine that a foreign object has been detected based on a comparison of the amount of power requested and the one or more measured power values; and inform the wireless power transmission apparatus to stop or suspend the transmission of wireless power in response to determining that the foreign object has been detected. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification