Coil structure for wireless power transmissions and wireless power transmitter including the same
First Claim
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1. A coil structure for wireless power transmissions comprising:
- a body comprising an upper surface and a side surface extending from the upper surface;
an upper transmission coil disposed on the upper surface and configured to generate an electromagnetic field passing through the upper surface;
at least one side transmission coil wound around a perimeter of the side surface and configured to generate an electromagnetic field passing through the side surface; and
a magnetic shield layer formed in an upper portion of the body below the upper surface, and configured to block the magnetic field generated by the upper transmission coil from propagating toward a lower portion of the body.
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Abstract
A coil structure for wireless power transmissions includes: a body having a cylindrical shape; an upper transmission coil formed on the body and configured to generate an electromagnetic field passing through an upper surface of the body; and at least one side transmission coil formed on the body and configured to generate an electromagnetic field passing through a side surface of the body.
11 Citations
16 Claims
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1. A coil structure for wireless power transmissions comprising:
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a body comprising an upper surface and a side surface extending from the upper surface; an upper transmission coil disposed on the upper surface and configured to generate an electromagnetic field passing through the upper surface; at least one side transmission coil wound around a perimeter of the side surface and configured to generate an electromagnetic field passing through the side surface; and a magnetic shield layer formed in an upper portion of the body below the upper surface, and configured to block the magnetic field generated by the upper transmission coil from propagating toward a lower portion of the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless power transmitter comprising:
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a direct current-alternating current converter configured to convert a direct current voltage into an alternating current voltage; and a transmission resonator comprising a wireless power transmission coil structure configured to wirelessly transmit power based on the alternating current voltage converted by the direct current-alternating current converter, wherein the wireless power transmission coil structure comprises a body comprising an upper surface and a side surface extending from the upper surface, an upper transmission coil disposed on the upper surface and configured to generate an electromagnetic field passing through the upper surface, at least one side transmission coil wound around a perimeter of the side surface and configured to generate an electromagnetic field passing through the side surface, and a magnetic shield layer formed in an upper portion of the body below the upper surface, and configured to block the magnetic field generated by the upper transmission coil from propagating toward a lower portion of the body. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification