Wireless power supply system
First Claim
1. A wireless power supply close coupling adapter for relaying power from a wireless power supply to a remote device having a secondary circuit, the adapter comprising:
- a wireless power transfer surface;
a secondary resonator circuit; and
a shield positioned between said secondary resonator circuit and said wireless power transfer surface to reduce reflected impedance during wireless power transfer by reducing coupling between said remote device and at least one of the wireless power supply close coupling adapter and the wireless power supply;
wherein said secondary resonator circuit includes a first secondary resonator and a second secondary resonator, wherein said shield is positioned between said first secondary resonator and said second secondary resonator, and wherein said first secondary resonator and said second secondary resonator are electrically connected in series.
3 Assignments
0 Petitions
Accused Products
Abstract
A wireless power system for wirelessly transferring power to a remote device from a wireless power supply at a range of distances. Various embodiments are contemplated in which reflected impedance from the remote device can be reduced by reducing coupling outside the desired wireless power transfer path, allowing delivery of wireless power over a range of distances. For example, a system incorporating one or more of shielding, spacing, and offsetting may be used to reduce reflected impedance from the remote device. An adapter may also be used to extend the range of wireless power transfer.
5 Citations
19 Claims
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1. A wireless power supply close coupling adapter for relaying power from a wireless power supply to a remote device having a secondary circuit, the adapter comprising:
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a wireless power transfer surface; a secondary resonator circuit; and a shield positioned between said secondary resonator circuit and said wireless power transfer surface to reduce reflected impedance during wireless power transfer by reducing coupling between said remote device and at least one of the wireless power supply close coupling adapter and the wireless power supply; wherein said secondary resonator circuit includes a first secondary resonator and a second secondary resonator, wherein said shield is positioned between said first secondary resonator and said second secondary resonator, and wherein said first secondary resonator and said second secondary resonator are electrically connected in series.
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2. A wireless power supply close coupling adapter for relaying power from a wireless power supply to a remote device having a secondary circuit, the adapter comprising:
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a wireless power transfer surface; a secondary resonator circuit; and a shield positioned between said secondary resonator circuit and said wireless power transfer surface to reduce reflected impedance during wireless power transfer by reducing coupling between said remote device and at least one of the wireless power supply close coupling adapter and the wireless power supply; wherein said secondary resonator circuit includes a shielded secondary resonator portion and an unshielded secondary resonator portion, wherein said shield is positioned between said shielded secondary resonator portion and the remote device.
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3. A wireless power supply for transferring power wirelessly to a remote device, said wireless power supply comprising:
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a wireless power transfer surface; a primary resonator capable of transferring wireless power to at least one of a secondary of the remote device and a secondary resonator of the remote device; and a primary capable of forming an inductive coupling with a portion of said primary resonator, wherein said inductive coupling energizes the primary resonator to transfer power wirelessly, wherein said primary is offset with respect to said primary resonator such that said inductive coupling is greater than an inductive coupling between said primary and at least one of the secondary and the secondary resonator; wherein a reflected impedance from at least one of the secondary and the secondary resonator is reduced. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification