Resonant power transmission coils and systems
First Claim
1. An implantable receiver configured to receive wireless energy, comprising:
- a housing defining an interior space containing internal components susceptible to interference by magnetic flux;
a covering disposed on at least two sides of the housing, the covering being formed of a ferrite material, wherein for each side of the at least two sides, the covering comprises a plurality of adjacent tiles disposed on the associated side, wherein a first set of tiles are disposed on a first side of the housing and a second set of tiles are disposed on a second side of the housing, wherein each of the plurality of adjacent tiles includes a plurality of edge faces, an inner face facing the housing, and an outer face opposite the inner face, wherein the outer face has a larger surface area than each edge face, wherein a first tile on the first side of the housing overlaps a second tile on the second side of the housing to eliminate gaps between the first tile and the second tile, wherein the first tile has a first orientation such that the outer face of the first tile faces a first direction and the second tile has a second orientation such that the outer face of the second tile faces a second direction, and wherein the first orientation is different from the second orientation; and
at least two wires wrapped around the housing to form a receiver coil.
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Accused Products
Abstract
An improved wireless transmission system for transferring power over a distance. The system includes a transmitter generating a magnetic field and a receiver for inducing a voltage in response to the magnetic field. In various respects, the receiver is configured to be implanted in a body. The receiver may include a housing enclosing a receiving coil and associated electronic components, a covering around at least a portion of the housing, and at least two wires wrapped around the housing to form a plurality of turns. The covering may be formed of a ferrite material configured to both magnetically shield a respective portion of the internal volume of the housing and redirect incoming magnetic flux from the transmitter to improve efficiency. Methods of use are also provided.
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Citations
14 Claims
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1. An implantable receiver configured to receive wireless energy, comprising:
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a housing defining an interior space containing internal components susceptible to interference by magnetic flux; a covering disposed on at least two sides of the housing, the covering being formed of a ferrite material, wherein for each side of the at least two sides, the covering comprises a plurality of adjacent tiles disposed on the associated side, wherein a first set of tiles are disposed on a first side of the housing and a second set of tiles are disposed on a second side of the housing, wherein each of the plurality of adjacent tiles includes a plurality of edge faces, an inner face facing the housing, and an outer face opposite the inner face, wherein the outer face has a larger surface area than each edge face, wherein a first tile on the first side of the housing overlaps a second tile on the second side of the housing to eliminate gaps between the first tile and the second tile, wherein the first tile has a first orientation such that the outer face of the first tile faces a first direction and the second tile has a second orientation such that the outer face of the second tile faces a second direction, and wherein the first orientation is different from the second orientation; and
at least two wires wrapped around the housing to form a receiver coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of improving efficiency in a wireless power transfer system, comprising the steps of:
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generating magnetic flux with an external transmitter positioned near a patient towards a receiver implanted in the patient; and directing the magnetic flux towards a receiver coil of the receiver with a ferrite covering that surrounds at least two sides of a housing of the receiver, the housing defining an interior space, wherein for each side of the at least two sides, the covering comprises a plurality of adjacent tiles disposed on the associated side, wherein a first set of tiles are disposed on a first side of the housing and a second set of tiles are disposed on a second side of the housing, wherein each of the plurality of adjacent tiles includes a plurality of edge faces, an inner face facing the housing, and an outer face opposite the inner face, wherein the outer face has a larger surface area than each edge face, wherein a first tile on the first side of the housing has a first size, and a second tile on the second side of the housing has a second size, and wherein the first size is different from the second size. - View Dependent Claims (12, 13, 14)
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Specification