WIRELESS POWER TRANSFER DEVICE AND METHOD
First Claim
1. A wireless power transfer device comprising:
- a first coil having a first portion, and configured to generate a magnetic field;
a second coil having a second portion, and positioned with respect to the first coil such that the first portion of the first coil overlaps the second portion of the second coil in an overlap region;
a power amplifier electrically coupled to one selected from a group consisting of the first coil and the second coil, the power amplifier configured to output a drive signal; and
a flux concentrator aligned with the overlap region and configured to concentrate a magnetic flux of the magnetic field.
1 Assignment
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Accused Products
Abstract
A wireless power transfer device including a first coil having a first portion, and configured to generate a magnetic field, and a second coil having a second portion. The second coil positioned with respect to the first coil such that the first portion of the first coil overlaps the second portion of the second coil in an overlap region. The wireless power transfer device also includes a power amplifier electrically coupled to one selected from a group consisting of the first coil and the second coil, and a flux concentrator aligned with the overlap region and configured to concentrate a magnetic flux of the magnetic field. The power amplifier configured to output a drive signal.
14 Citations
25 Claims
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1. A wireless power transfer device comprising:
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a first coil having a first portion, and configured to generate a magnetic field; a second coil having a second portion, and positioned with respect to the first coil such that the first portion of the first coil overlaps the second portion of the second coil in an overlap region; a power amplifier electrically coupled to one selected from a group consisting of the first coil and the second coil, the power amplifier configured to output a drive signal; and a flux concentrator aligned with the overlap region and configured to concentrate a magnetic flux of the magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of wirelessly transferring power with a wireless power transfer device, the wireless power transfer device including a first coil, a second coil, a power amplifier, a switch network, and an electronic processor, the method comprising:
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overlapping a first portion of the first coil with a second portion of the second coil in an overlap region; aligning a flux concentrator with the overlap region; generating, with the power amplifier a drive signal; receiving the drive signal by one selected from a group consisting of the first coil and the second coil; and generating, by one selected from the group consisting of the first coil and the second coil, a magnetic field in response to receiving the drive signal. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A wireless power transfer system comprising:
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an impedance-matching-circuit-free wireless power transfer device including a power amplifier configured to generate a drive signal, a plurality of coils selectively electrically coupled to the power amplifier, and configured to generate a first plurality of magnetic fields, the plurality of coils couplable to the power amplifier and to each other in a plurality of configurations, the first coil and the second coil configured to terminate at a predetermined impedance in each of the plurality of configurations; and an external device including a receiver coil configured to magnetically couple to one of a group consisting of the first coil and the second coil to receive wireless power through the one of the group consisting of the first coil and the second coil. - View Dependent Claims (22, 23, 24, 25)
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Specification