Back to results
US 2009/0015075 A1Published application
Wireless Energy Transfer Using Coupled Antennas
AssigneeNigel Power, LLC
InventorsNigel P. Cook, Paul Meier, Lukas Sieber, Marc Secall, Hanspeter Widmer
Life of this patent
Estimating the term…
Abstract
A power transmission system produces a magnetic field at a source that is wirelessly coupled to a receiver. Both the source and receiver are capacitively coupled LC circuits, driven at or near resonance.
Claims41
A method of transmitting power wirelessly, comprising:
- driving a series resonant antenna at a value near its resonant frequency to produce a magnetic field output, said non radiative antenna formed of a combination of resonant parts, including at least an inductive part formed by a wire loop, and a capacitor part that is separate from a material forming the inductive part;
- and
- maintaining at least one characteristic of said antenna such that its usable range has a minimum usable distance over which power can be received, which minimum distance is set by a detuning effect when a receiver gets too close to said antenna.
A method, comprising:
- transmitting a magnetic field using a first resonant transmission part;
- receiving said magnetic field in a second resonant transmission part;
- and
- in said second resonant transmission part, using power from the magnetic field.
1 more element
A method, comprising:
- forming a magnetic field using a first part;
- coupling said magnetic field to a second part that forms a loosely coupled transformer with said first part, where said second part is further than 6 inches from said first part;
- and
- in said second part, recovering power from the coupled magnetic field.
1 more element
A system comprising:
- a series resonant antenna;
- a driving part for said series resonant antenna, driving said antenna at a value near its resonant frequency to produce a magnetic field output, said antenna formed of a combination of series resonant parts, including at least an inductive part formed by a wire loop, and a capacitor part that is separate from a material forming the inductive part, and
- wherein said series resonant antenna has at least one characteristic such that its usable range has a minimum usable distance over which power can be received, which minimum distance is set by a detuning effect when a receiver gets too close to said antenna.
A system, comprising:
- a first resonant transmission part formed of a capacitively loaded magnetic dipole antenna;
- a second resonant reception part, tuned to have similar resonant characteristics to said first resonant transmission part, receiving a magnetic field therefrom, and producing a power output from the magnetic field.
A system, comprising:
- a first LC circuit, connected to receive a signal that forms a magnetic field;
- and
- a second LC circuit that forms a loosely coupled transformer with said first LC circuit, where said second part is further than 6 inches from said first part, and has a connection for recovering power from the coupled magnetic field.
Dependencies are inferred from the claim text.