Multi-Band and Broadband Wireless Power Transfer through Embedded Geometric Configurations

• US 20130328410A1
• Filed: 06/12/2013
• Published: 12/12/2013
• Est. Priority Date: 06/12/2012
• Status: Active Grant

• Current Assignee: The Florida International University Board of Trustees (State University System of Florida), Georgia Tech Research Corporation (University System of Georgia)
• Original Assignee: Georgia Tech Research Corporation (University System of Georgia)
• Inventors: Georgakopoulos, Stavros, Tentzeris, Manos, Jonah, Olutola
• Granted Patent: US 9,466,418 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 27/006 with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10

Abstract

A wireless power transmission system includes first source conductor that generates a first electromagnetic near field in response to a power source. A first source element resonates in response to excitation from the first source conductor. A second resonant source element resonates in response to excitation from the first source conductor. A first resonant load element resonates in response to excitation from the first resonant source element. The first resonant load element generates a fluctuating field when resonating. A second resonant load element resonates at the second resonant frequency in response to excitation from the second resonant source element. The second resonant load element generates a fluctuating field when resonating. A first load element generates a first current applied to a first load in response to resonance in the first resonant load element and the second resonant load element.

Claims

1. A wireless power transmission system for transmitting power from at least one power source to at least one load, comprising:

(a) a first source conductor configured to generate a first periodically fluctuating electromagnetic near field in response to an alternating current received from the power source;

(b) a first resonant source element that is configured to resonate with an oscillating current at a first resonant frequency in response to excitation from the first periodically fluctuating electromagnetic near field generated by the first source conductor;

(c) at least one second resonant source element that is configured to resonate with an oscillating current at a second resonant frequency in response to excitation from the first periodically fluctuating electromagnetic near field generated by the first source conductor;

(d) a first resonant load element that is spaced apart from the first resonant source element and the second resonant source element and that is configured to resonate at the first resonant frequency with an oscillating current in response to excitation from the first resonant source element, the first resonant load element configured to generate a periodically fluctuating electromagnetic near field when resonating with the second oscillating current;

(e) at least one second resonant load element that is spaced apart from the first resonant source element and the second resonant source element and that is configured to resonate at the second resonant frequency with an oscillating current in response to excitation from the second resonant source element, the second resonant load element configured to generate a periodically fluctuating electromagnetic near field when resonating with the oscillating current; and

(f) a first load conductor that is electromagnetically coupled to the first resonant load element and the second resonant load element, and that is configured to generate a first current applied to a first load in response to resonance in the first resonant load element and the second resonant load element.

2. The wireless power transmission system of claim 1, wherein the first resonant source element has a Q factor that is at a maximum at the first resonant frequency and wherein the first resonant load element has a Q factor that is at a maximum at the first resonant frequency.

3. The wireless power transmission system of claim 1, wherein the second resonant source element has a Q factor that is at a maximum at the second resonant frequency and wherein the second resonant load element has a Q factor that is at a maximum at the second resonant frequency.

4. The wireless power transmission system of claim 1, wherein the first source conductor, the first resonant source element and the second resonant source element are all disposed on a first plane and wherein the first load conductor, the first resonant load element and the second resonant load element are all disposed on a second plane that is different from and parallel to the first plane.

5. The wireless power transmission system of claim 4, wherein the first resonant source element is aligned with the first resonant load element and wherein the second resonant source element is aligned with the second resonant load element

6. The wireless power transmission system of claim 1, further comprising:

(a) at least one second source conductor configured to generate a second periodically fluctuating electromagnetic near field in response to an alternating current received from the power source; and

(b) at least one second load conductor that is electromagnetically coupled to the first resonant load element and the second resonant load element, and that is configured to generate a second current applied to a second load in response to resonance in at least one of the first resonant load element and the second resonant load element.

7. The wireless power transmission system of claim 6, wherein the first source conductor is configured to transmit a power signal to the first load conductor and wherein the second source conductor is configured to transmit a power signal to the second load conductor.

8. The wireless power transmission system of claim 1, wherein the first resonant source element and the second resonant source element each comprises:

(a) an inductive loop having a first end and a different second end; and

(b) a capacitor that is coupled to the first end and to the second end.

9. The wireless power transmission system of claim 1, wherein the first resonant load element and the second resonant load element each comprises:

(a) an inductive loop having a first end and a different second end; and

(b) a capacitor that is coupled to the first end and to the second end.

10. The wireless power transmission system of claim 1, wherein at least one of the first resonant source element, the second resonant source element, the first resonant load element and the second resonant load element includes a conductive material that has been printed on the planar substrate.

11. A wireless power transmission device for transmitting power from at least one power source to at least one load, comprising:

(a) a first source conductor configured to generate a first periodically fluctuating electromagnetic near field in response to an alternating current received from the power source;

(b) a first resonant source element that has a first resonant frequency and that has a Q factor that is at a maximum at the first resonant frequency, the first resonant source element configured to resonate with an oscillating current at the first resonant frequency in response to excitation from the first periodically fluctuating electromagnetic near field generated by the first source conductor;

(c) at least one second resonant source element that has a second resonant frequency, different from the first resonant frequency, and that has a Q factor that is at a maximum at the second resonant frequency, the second resonant source element configured to resonate with an oscillating current at the second resonant frequency in response to excitation from the first periodically fluctuating electromagnetic near field generated by the first source conductor;

(d) a first resonant load element that is spaced apart from the first resonant source element and the second resonant source element and that is configured to resonate at the first resonant frequency with an oscillating current in response to excitation from the first resonant source element, the first resonant load element configured to generate a periodically fluctuating electromagnetic near field when resonating with the second oscillating current;

(e) at least one second resonant load element that is spaced apart from the first resonant source element and the second resonant source element and that is configured to resonate at the second resonant frequency with an oscillating current in response to excitation from the second resonant source element, the second resonant load element configured to generate a periodically fluctuating electromagnetic near field when resonating with the oscillating current; and

(f) a first load conductor that is electromagnetically coupled to the first resonant load element and the second resonant load element, and that is configured to generate a first current applied to a first load in response to resonance in the first resonant load element and the second resonant load element.

12. The wireless power transmission device of claim 11, further comprising:

(a) at least one second source conductor configured to generate a second fluctuating electromagnetic near field in response to an alternating current received from the power source; and

(b) at least one second load conductor that is electromagnetically coupled to the first resonant load element and the second resonant load element, and that is configured to generate a second current applied to a second load in response to resonance in the first resonant load element and the second resonant load element.

13. The wireless power transmission device of claim 12, wherein the first source conductor is configured to transmit a first signal to the first load conductor and wherein the second source conductor is configured to transmit a second signal to the second load conductor.

14. The wireless power transmission device of claim 12, wherein the first signal comprises a power signal and wherein the second signal comprises a data signal.

15. The wireless power transmission system of claim 11, wherein the first resonant source element and the second resonant source element each comprises:

(a) an inductive loop having a first end and a different second end; and

(b) a capacitor that is coupled to the first end and to the second end.

16. The wireless power transmission system of claim 11, wherein the first resonant load element and the second resonant load element each comprises:

(a) an inductive loop having a first end and a different second end; and

(b) a capacitor that is coupled to the first end and to the second end.

17. The wireless power transmission system of claim 11, wherein at least one of the first resonant source element, the second resonant source element, the first resonant load element and the second resonant load element includes a conductive material that has been printed on the planar substrate.