Battery charging apparatus with planar inductive charging platform
First Claim
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1. A battery charging apparatus comprising:
- an inductive charging platform including a charging surface on which an electrical device to be charged is to be placed;
a first winding for generating lines of magnetic flux generally perpendicular to the charging surface;
and a second winding located within an area defined by the first winding for generating an auxiliary magnetic flux generally perpendicular to the charging surface, such that magnetic flux generated by said second winding compensates for a reduction in magnetic flux generated by said first winding, thereby generating magnetic flux substantially uniformly over the surface of the charging platform.
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Abstract
A battery charging apparatus comprises an inductive charging platform including a charging surface on which an electrical device to be charged is to be placed, and a first winding for generating lines of magnetic flux generally perpendicular to the charging surface. To compensate for voltage sag caused by a reduction in the flux generated by the first winding, a second winding is located within an area defined by the first winding for generating an auxiliary magnetic flux generally perpendicular to the charging surface.
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16 Claims
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1. A battery charging apparatus comprising:
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an inductive charging platform including a charging surface on which an electrical device to be charged is to be placed; a first winding for generating lines of magnetic flux generally perpendicular to the charging surface; and a second winding located within an area defined by the first winding for generating an auxiliary magnetic flux generally perpendicular to the charging surface, such that magnetic flux generated by said second winding compensates for a reduction in magnetic flux generated by said first winding, thereby generating magnetic flux substantially uniformly over the surface of the charging platform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification