Method and system of wireless power transfer foreign object detection
First Claim
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1. A wireless power transfer foreign object detector comprising:
- a transmitter mat;
a plurality of foreign object sensors coupled to said transmitter mat, said plurality of foreign object sensors providing at least one foreign object detection signal, said plurality of foreign object sensors disposed in a grid array;
a plurality of primary transmitter coils coupled to said transmitter mat, said plurality of primary transmitter coils each providing at least one primary transmitter signal, said plurality of primary transmitter coils responsive to said at least one foreign object detection signal to redirect the primary transmitter signal in response to the foreign object detection signal away from at least one of the primary transmitter coils;
a transmitting device that generates a corrective action signal in response to said foreign object detection signal;
said transmitter mat configured to allow placement of at least one secondary receiver coil so that it is electrically responsive to at least one primary transmitter coil, wherein said at least one secondary receiver coil may provide at least one secondary receiver signal; and
wherein said plurality of foreign object sensors detects at least one magnetic or electric field characteristic of said at least one secondary receiver coil, wherein said foreign object detection signal is responsive to a plurality of secondary receiver coils.
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Abstract
A wireless power transfer foreign object detector having at least one foreign object detector providing at least one foreign object detection signal, and at least one primary transmitter coil providing at least one primary transmitter signal, the primary transmitter coil responsive to the at least one foreign object detection signal.
14 Citations
16 Claims
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1. A wireless power transfer foreign object detector comprising:
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a transmitter mat; a plurality of foreign object sensors coupled to said transmitter mat, said plurality of foreign object sensors providing at least one foreign object detection signal, said plurality of foreign object sensors disposed in a grid array; a plurality of primary transmitter coils coupled to said transmitter mat, said plurality of primary transmitter coils each providing at least one primary transmitter signal, said plurality of primary transmitter coils responsive to said at least one foreign object detection signal to redirect the primary transmitter signal in response to the foreign object detection signal away from at least one of the primary transmitter coils; a transmitting device that generates a corrective action signal in response to said foreign object detection signal; said transmitter mat configured to allow placement of at least one secondary receiver coil so that it is electrically responsive to at least one primary transmitter coil, wherein said at least one secondary receiver coil may provide at least one secondary receiver signal; and wherein said plurality of foreign object sensors detects at least one magnetic or electric field characteristic of said at least one secondary receiver coil, wherein said foreign object detection signal is responsive to a plurality of secondary receiver coils. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification