RESONATORS FOR WIRELESS POWER TRANSFER
Described herein are embodiments of a method for receiving power wirelessly from at least one high-Q resonator that include integrating a high-Q resonator element in an electronic device, said high-Q resonator element including an inductive part wound around a magnetic material, said resonator element including a first coil portion which is connected in series with a capacitor to form an LC resonant circuit that may be resonant with an applied magnetic driving signal, and also including a second coil portion wound around a magnetic material, and inductively coupled to said first coil portion and receiving power wirelessly using said resonator element, at a frequency that is substantially resonant with a value determined according to said LC resonant circuit and producing an output using said coil portion to drive said electronic device.
1 . A method for receiving power wirelessly from at least one high-Q resonator, comprising:
integrating a high-Q resonator element in an electronic device, said high-Q resonator element including an inductive part wound around a magnetic material, said resonator element including a first coil portion which is connected in series with a capacitor to form an LC resonant circuit that is resonant with an applied magnetic driving signal, and also including a second coil portion wound around a magnetic material, and inductively coupled to said first coil portion; and
receiving power wirelessly using said resonator element, at a frequency that is substantially resonant with a value determined according to said LC resonant circuit and producing an output using said coil portion to drive said electronic device.
2 . A method as in claim 1 , further comprising tuning the resonator element based on characteristics of the reception.
3 . A method as in claim 2 , wherein said characteristics include an amount of power received by the electronic device.
4 . A method as in claim 2 , wherein said tuning comprises changing a Q value of said first coil portion on said resonator element.
5 . A method as in claim 2 , wherein said tuning comprises changing a resonant frequency value of said resonator element.
6 . A method as in claim 2 , wherein said tuning comprises changing a characteristic to change the coupling coefficient.
7 . A method as in claim 1 , wherein said second coil part has a different number of windings than said first coil part.
8 . A method as in claim 1 , wherein said resonant element comprises a rod of magnetic material which is substantially cylindrical.
9 . A method as in claim 2 , wherein said electronic device is a portable electronic device.
10 . A portable device for receiving power wirelessly from at least one high-Q resonator, comprising:
a housing;
a high-Q resonator comprising a first coil part wound around a magnetic material, inside said housing, said first coil part in parallel with a capacitor forming an LC circuit, and a second coil part not wired to said first coil part;
a circuit, that receives power from said second coil part, and transfers said power to a powered device within said housing to power said device,
wherein said resonator operates to control an amount of power transferred within said housing.
11 . A device as in claim 10 , wherein said resonator comprises a rod of magnetic material, extending across an area of said housing.
12 . A device as in claim 10 , further comprising a tuning part for the resonator, said tuning part changing at least one parameter of said resonator to adjust an amount of received power.
13 . A device as in claim 12 , wherein said tuning part changes a resonant frequency of said resonator.
14 . A device as in claim 12 , wherein said tuning part changes a Q value of said resonator.
15 . A device as in claim 12 , wherein said tuning part is controlled according to a parameter of operation of said powered device, to automatically change said tuning.
16 . A device as in claim 12 , wherein said tuning part is controlled to change the coupling coefficient.