POWER TRANSMISSION ACROSS A SUBSTANTIALLY PLANAR INTERFACE BY MAGNETIC INDUCTION AND GEOMETRICALLY-COMPLIMENTARY MAGNETIC FIELD STRUCTURES
First Claim
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1. Apparatus for creating an alternating magnetic field for inductive power transfer to a power receiver device, comprising:
- means for providing a planar power delivery surface comprising a plurality of adjacent planar electro-magnetic pole areas in a planar power delivery surface; and
means for creating alternating polarity magnetic fields in each of the planar electro-magnetic pole areas with opposite magnetic polarities in adjacent ones of the planar pole areas.
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Abstract
Geometrically complimentary magnetic field structures are adapted for efficient power transfer by induction from a planar power delivery surface to a power receiving device. Planar surface electro-magnetic coil pole areas for power delivery and receiver coil assemblies as well as several would coil apparatus and configurations are included.
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Citations
13 Claims
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1. Apparatus for creating an alternating magnetic field for inductive power transfer to a power receiver device, comprising:
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means for providing a planar power delivery surface comprising a plurality of adjacent planar electro-magnetic pole areas in a planar power delivery surface; and means for creating alternating polarity magnetic fields in each of the planar electro-magnetic pole areas with opposite magnetic polarities in adjacent ones of the planar pole areas. - View Dependent Claims (2, 3, 4)
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5. Apparatus for receiving power from an alternating magnetic field for inductive power transfer from a power delivery surface with a plurality of different polarity alternating magnetic field pole areas, comprising:
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means for positioning at least one receiver coil pole piece over a planar surface pole area of one magnetic polarity and for positioning at least one receiver coil pole piece over another planar surface pole area that is always opposite magnetic polarity to said planar surface area of said one magnetic polarity; and means for extracting electric current from the receiver coils and rectifying said current for DC power. - View Dependent Claims (6, 7, 8, 9)
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10. Magnetic pole apparatus for transferring power from a power delivery pad to a power receiver circuit inductively, comprising:
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one half of a pot core with a coil in the power delivery pad; a second half of the pot core with a coil in the power receiver circuit; wherein said coil in the pot core half in the power delivery pad is connected electrically to an AC driver circuit, and said coil in the pot core half in the power receiver circuit is connected to circuit means for extracting electric current from the coil when the coil is exposed to an alternating magnetic field.
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11. A method of providing an alternating magnetic field in a power delivery surface, comprising:
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defining a plurality of electro-magnetic pole areas on a planar surface of a ferromagnetic core plate by extending an electric conductor around portions of the planar surface; and exciting the electric conductor with an alternating current. - View Dependent Claims (12)
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13. A method of delivering power inductively from a power delivery surface to a receiver device, comprising:
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defining a plurality of electro-magnetic pole areas on a planar surface of a ferromagnetic core plate by providing plurality of troughs in the planar surface of the core plate around the perimeters of the pole areas, and positioning an electrical conductor in the troughs in a configuration that routes electric current along adjacent edges of adjacent pole areas in a manner that generates alternating magnetic fields of opposite polarity in adjacent pole areas of the planar surface; exciting the electric conductor with an alternating current to generate the alternating magnetic fields of opposite magnetic polarity in the adjacent pole areas of the planar surface; mounting a plurality of receiver coils with pole pieces in a geometric pattern on a core yoke that, when placed on the planar power delivery surface, positions at least one pole piece over one of the pole areas of one magnetic polarity and at least one other pole piece over one of the pole areas of the opposite magnetic polarity simultaneously; and extracting electric current from the receiver coils.
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Specification