Foreign object detection in wireless energy transfer systems
First Claim
1. An apparatus for detecting foreign object debris around a wireless power transfer system, the apparatus comprising:
- a plurality of detectors, each detector comprising one or more loops of conducting material and positioned so that each detector receives at least a portion of a common oscillating magnetic field generated by the wireless power transfer system; and
a controller configured to measure at least one of a voltage and a current in each detector and to determine, based on the measurements, whether foreign object debris is present around the wireless power transfer system,wherein at least some of the plurality of detectors comprise a first number of loops of the conducting material, and at least some of the plurality of detectors comprise a second number of loops of the conducting material larger than the first number.
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Accused Products
Abstract
Systems and methods for detecting foreign object debris around a wireless power transfer system include a plurality of detectors, each detector featuring one or more loops of conducting material, and a controller configured to measure at least one of a voltage and a current in each detector and to determine, based on the measurements, whether foreign object debris is present around the wireless power transfer system, where at least some of the plurality of detectors include a first number of loops of the conducting material, and at least some of the plurality of detectors include a second number of loops of the conducting material larger than the first number.
725 Citations
18 Claims
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1. An apparatus for detecting foreign object debris around a wireless power transfer system, the apparatus comprising:
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a plurality of detectors, each detector comprising one or more loops of conducting material and positioned so that each detector receives at least a portion of a common oscillating magnetic field generated by the wireless power transfer system; and a controller configured to measure at least one of a voltage and a current in each detector and to determine, based on the measurements, whether foreign object debris is present around the wireless power transfer system, wherein at least some of the plurality of detectors comprise a first number of loops of the conducting material, and at least some of the plurality of detectors comprise a second number of loops of the conducting material larger than the first number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12)
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8. A method for detecting foreign object debris around a wireless power transfer system, the method comprising:
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measuring at least one of a voltage and a current in each one of a plurality of detectors, wherein the plurality of detectors are positioned so that each detector receives at least a portion of a common oscillating magnetic field generated by the wireless power transfer system; and determining, based on the measurements, whether foreign object debris is present around the wireless power transfer system, wherein each of the detectors comprises one or more loops of conducting material; and wherein at least some of the plurality of detectors comprise a first number of loops of the conducting material, and at least some of the plurality of detectors comprise a second number of loops of the conducting material larger than the first number. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification