Inductive power transfer apparatus
First Claim
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1. A magnetic flux pad having a front face and a back face, the flux pad for generating or receiving magnetic flux in or from a space beyond the front face, the pad comprising:
- a magnetically permeable core having a side nearest to the front face of the pad; and
two substantially flat and substantially co-planar coils on the side of the core, magnetically associated with the core and each coil defining a corresponding pole area for sending or receiving flux,wherein the flux enters the pad at one of the pole areas, exits the pad at the other pole area and forms an arch between the pole areas in the space beyond the front face of the pad, and wherein the pad has a centreline that separates the pole areas defined by the two substantially flat substantially planar coils, and the core does not extend past a periphery of the two substantially flat substantially planar coils in a direction parallel to the centreline of the pad.
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Abstract
A magnetic flux pad for receiving or generating magnetic flux. The pad includes two pole areas (11, 12) associated with a magnetically permeable core 14. Coils 17 define the pole areas. The pad allows useable flux to be generated at a significant height above a surface of the pad.
13 Citations
20 Claims
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1. A magnetic flux pad having a front face and a back face, the flux pad for generating or receiving magnetic flux in or from a space beyond the front face, the pad comprising:
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a magnetically permeable core having a side nearest to the front face of the pad; and two substantially flat and substantially co-planar coils on the side of the core, magnetically associated with the core and each coil defining a corresponding pole area for sending or receiving flux, wherein the flux enters the pad at one of the pole areas, exits the pad at the other pole area and forms an arch between the pole areas in the space beyond the front face of the pad, and wherein the pad has a centreline that separates the pole areas defined by the two substantially flat substantially planar coils, and the core does not extend past a periphery of the two substantially flat substantially planar coils in a direction parallel to the centreline of the pad. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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- 11. A magnetic flux pad comprising a magnetically permeable core, and two wound coils arranged substantially co-planar on the magnetically permeable core, wherein each of the two coils defines a pole area, and the windings of the two coils are wider between the pole areas than at a periphery of the pad.
- 17. A magnetic flux pad comprising a magnetically permeable core, and two substantially flat coils arranged substantially co-planar on the magnetically permeable core, wherein each of the coils defines a pole area, the magnetically permeable core extends in a longitudinal direction between the pole areas, and the magnetically permeable core is discontinuous in a direction transverse to the longitudinal direction.
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20. A magnetic flux pad having a front face and a back face, the flux pad for generating or receiving magnetic flux in or from a space beyond the front face, the pad comprising:
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a magnetically permeable core having a side nearest to the front face of the pad; and two substantially flat, asymmetric, and substantially co-planar coils on the side of the core, magnetically associated with the core and each coil defining a corresponding pole area for sending or receiving flux, wherein the flux enters the pad at one of the pole areas, exits the pad at the other pole area and forms an arch between the pole areas in the space beyond the front face of the pad.
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Specification