Self-canceling magnetic structures for transferring power and communication signals
First Claim
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1. A structure comprising:
- a first power coil configured to be magnetically coupled to a second power coil; and
an auxiliary coil over the first power coil, wherein at least one of the first power coil and the auxiliary coil has an 8-shaped structure, and wherein the auxiliary coil is a bias coil for supplying a bias voltage in a wireless power transfer system.
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Abstract
A structure comprises a first power coil configured to be magnetically coupled to a second power coil and an auxiliary coil over the first power coil, wherein at least one of the first power coil and the auxiliary coil has an 8-shaped structure.
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Citations
15 Claims
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1. A structure comprising:
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a first power coil configured to be magnetically coupled to a second power coil; and an auxiliary coil over the first power coil, wherein at least one of the first power coil and the auxiliary coil has an 8-shaped structure, and wherein the auxiliary coil is a bias coil for supplying a bias voltage in a wireless power transfer system. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device comprising:
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a first coil over a second coil, wherein; at least one of the first coil and the second coil is configured to be magnetically coupled to a third coil; and at least one of the first coil and the second coil comprises a first portion having a first almost enclosed shape and a second portion having a second almost enclosed shape, and wherein the first portion and the second portion are arranged to enhance a magnetic field strength at a center portion of the device, and wherein the first portion comprises a first straight line and a first arc, and the second portion comprises a second straight line and a second arc, and wherein the first straight line and the second straight line are in parallel and immediately adjacent to each other. - View Dependent Claims (8, 9, 10, 11)
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12. A method comprising:
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wirelessly transferring power from a plurality of first coils to a plurality of second coils, wherein at least one of the plurality of first coils comprises; a first portion having a first almost enclosed shape; and a second portion having a second almost enclosed shape, and wherein the first portion and the second portion are arranged such that a first magnetic flux through the first portion and a second magnetic flux through the second portion are opposite to each other with reference to a vertical axis perpendicular to the plurality of first coils and the plurality of second coils; and transferring both power and communication signals by one of the plurality of first coils through a same in-band communication channel. - View Dependent Claims (13, 14, 15)
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Specification