LOW EMISSION COIL TOPOLOGY FOR WIRELESS CHARGING
First Claim
Patent Images
1. A transmitter charging station, comprising:
- a length of conductive wire to form a multi-turn spiral coil having one or more turns around one or more axis;
a plurality of discrete capacitors for each of the respective plurality of turns; and
wherein at least two of the plurality or capacitors are configured to have substantially the same resonance frequency.
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Abstract
The disclosure generally relates to a method and apparatus for reducing or substantially eliminating, the electric field above a wireless charging station, in one embodiment, a wireless charging station is formed from a length of conductive wire forming a multi turn spiral coil having a plurality of turns around one or more axis. A plurality of discrete capacitors are selected, and positioned at each of the respective plurality of turns. The plurality of discrete capacitors may be connected in series. The capacitance value of each of the plurality of capacitors may be selected to substantially reduce the electric filed above the surface of the charging station.
15 Citations
25 Claims
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1. A transmitter charging station, comprising:
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a length of conductive wire to form a multi-turn spiral coil having one or more turns around one or more axis; a plurality of discrete capacitors for each of the respective plurality of turns; and wherein at least two of the plurality or capacitors are configured to have substantially the same resonance frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 15)
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9. A method for reducing near field electric field emission of a charging station, the method comprising:
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providing a length of conductive wire to form a multi-turn spiral coil having m turns around one or more axis; positioning n discrete capacitors for each of the respective plurality of turns; and selecting capacitance value for each of a discrete capacitors as a function of the number of the turns (m) in the multi-turn spiral coil and a cost function associated with the plurality of capacitors. - View Dependent Claims (10, 11, 12, 13, 14, 16)
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17. A wireless charging station, comprising;
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a length of conductive wire to form a multi-turn spiral coil having a plurality of turns around one or more axis; and a plurality of tuning elements positioned along the length of the conductive wire to correspond to each of the plurality of coil turns to resonate the multi-turn spiral coil. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification