MAGNETIC INDUCTIVE CHARGING WITH LOW FAR FIELDS
First Claim
1. A charging station apparatus for wirelessly transmitting electrical power to mobile electronic devices (MEDs), comprising:
- a planar charging surface;
a first prescribed even number of series-interconnected bank A source coils;
a second prescribed even number of series-interconnected bank B source coils; and
source electronics for energizing the bank A and bank B source coils, wherein,whenever energized, each source coil generates an alternating electromagnetic flux field in a direction perpendicular to the charging surface,the bank A source coils and bank B source coils are alternately energized in a repeating duty cycle,the bank A source coils and bank B source coils are interleaved so that the MEDs can have any two-dimensional orientation with respect to the charging surface, andwhenever one or more MEDs each comprising a receiver coil are placed in close proximity to the charging surface, one or more of the flux fields wirelessly induce electrical power in the receiver coil.
2 Assignments
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Accused Products
Abstract
A charging station wirelessly transmits power to mobile electronic devices (MEDs) each having a planar-shaped receiver coil (RC) and a capacitor connected in parallel across the RC. The station includes a planar charging surface, a number of series-interconnected bank A source coils (SCs), a number of series-interconnected bank B SCs, and electronics for energizing the SCs. Each SC generates a flux field perpendicular to the charging surface. The bank A and bank B SCs are interleaved and alternately energized in a repeating duty cycle. The coils in each bank are also alternately wound in a different direction so that the fields cancel each other out in a far-field environment. Whenever an MED is placed in close proximity to the charging surface, the fields wirelessly induce power in the RC. The MEDs can have any two-dimensional orientation with respect to the charging surface.
154 Citations
20 Claims
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1. A charging station apparatus for wirelessly transmitting electrical power to mobile electronic devices (MEDs), comprising:
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a planar charging surface; a first prescribed even number of series-interconnected bank A source coils; a second prescribed even number of series-interconnected bank B source coils; and source electronics for energizing the bank A and bank B source coils, wherein, whenever energized, each source coil generates an alternating electromagnetic flux field in a direction perpendicular to the charging surface, the bank A source coils and bank B source coils are alternately energized in a repeating duty cycle, the bank A source coils and bank B source coils are interleaved so that the MEDs can have any two-dimensional orientation with respect to the charging surface, and whenever one or more MEDs each comprising a receiver coil are placed in close proximity to the charging surface, one or more of the flux fields wirelessly induce electrical power in the receiver coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A power receiver apparatus for wirelessly receiving electrical power from a charging station, comprising:
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a receiver coil having a planar shape; and a capacitor CR connected in parallel across the receiver coil, said capacitor serving to resonate the receiver coil, wherein, whenever the power receiver apparatus is placed in close proximity to a planar charging surface of the charging station which generates a plurality of alternating electromagnetic flux fields in a direction perpendicular to the charging surface, one or more of the flux fields wirelessly induce electrical power in the receiver coil. - View Dependent Claims (16, 17, 18, 19)
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20. A charging station apparatus for wirelessly transmitting electrical power to mobile electronic devices (MEDs), comprising:
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a planar charging surface; a first prescribed even number of series-interconnected bank A source coils which are alternately wound in a different direction; a second prescribed even number of series-interconnected bank B source coils which are alternately wound in a different direction; and source electronics for energizing the bank A and bank B source coils, wherein, whenever energized, each source coil generates an alternating electromagnetic flux field in a direction perpendicular to the charging surface, the flux fields cancel each other out in a far-field environment, the bank A source coils and the bank B source coils are interleaved and alternately energized in a repeating duty cycle, so that the MEDs can have any two-dimensional orientation with respect to the charging surface.
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Specification