Systems and methods for induction charging with a closed magnetic loop
First Claim
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1. An apparatus for wireless power transmission, comprising:
- a plurality of coplanar coils, each of the plurality of coplanar coils configured to be individually energized and produce a magnetic field; and
a controller configured to reverse polarity of the magnetic field of at least one of the plurality of coplanar coils based on a measure of coupling between individual coils of the plurality of coils and at least one receiver coil and to select at least two of the plurality of coplanar coils for wireless power transmission based on the measure of coupling between the individual coils of the plurality of coils and the at least one receiver coil.
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Abstract
Systems, methods, and computer program products for induction charging with a closed magnetic loop are described herein. In one aspect, an apparatus for wireless power transmission comprises a plurality of coplanar coils, each of the plurality of coplanar coils configured to be individually energized and produce a magnetic field. Further, the controller is configured to reverse polarity of the magnetic field of at least one of the plurality of coplanar coils based on a measure of coupling between coils and to select at least two of the plurality of coplanar coils for wireless power transmission based on the measure of coupling between coils.
36 Citations
32 Claims
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1. An apparatus for wireless power transmission, comprising:
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a plurality of coplanar coils, each of the plurality of coplanar coils configured to be individually energized and produce a magnetic field; and a controller configured to reverse polarity of the magnetic field of at least one of the plurality of coplanar coils based on a measure of coupling between individual coils of the plurality of coils and at least one receiver coil and to select at least two of the plurality of coplanar coils for wireless power transmission based on the measure of coupling between the individual coils of the plurality of coils and the at least one receiver coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for wireless power transmission, comprising:
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energizing a plurality of coplanar coils so that each of the plurality of coplanar coils produces a magnetic field; reversing polarity of the magnetic field of at least one of the plurality of coplanar coils based on a measure of coupling between individual coils of the plurality of coils and at least one receiver coil; and selecting at least two of the plurality of coplanar coils for wireless power transmission based on the measure of coupling between the individual coils of the plurality of coils and at least one receiver coil. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for wireless power transmission, comprising:
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means for energizing a plurality of coplanar coils so that each of the plurality of coplanar coils produces a magnetic field; means for reversing polarity of the magnetic field of at least one of the plurality of coplanar coils based on a measure of coupling between coils; and means for selecting at least two of the plurality of coplanar coils for wireless power transmission based on the measure of coupling between individual coils of the plurality of coils and at least one receiver coil. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A non-transitory computer storage that stores executable program instructions that direct an apparatus for wireless power transmission to perform a process that comprises:
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energizing a plurality of coplanar coils so that each of the plurality of coplanar coils produces a magnetic field; reversing polarity of the magnetic field of at least one of the plurality of coplanar coils based on a measure of coupling between individual coils of the plurality of coils and at least one receiver coil; and selecting at least two of the plurality of coplanar coils for wireless power transmission based on the measure of coupling between coils. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification