Power feeding device, power receiving device and wireless power feeding system

• US 10,320,235 B2
• Filed: 09/01/2015
• Issued: 06/11/2019
• Est. Priority Date: 01/14/2010
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kozakai, Osamu
• Primary Examiner(s): Barnie, Rexford N
• Assistant Examiner(s): Ortiz, Elim
• Application Number:
  US14/842,524
• Publication Number:
  US 20150372506A1
• Time in Patent Office: 1,379 Days
• Field of Search: 307104, 320108
• CPC Class Codes: H01F 27/2871 Pancake coils
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas

Abstract

Disclosed herein is a power feeding device including a power transmitter adapted to generate a plurality of transmission signals at different frequencies including at least power to be fed; a power feeding element that is fed with transmission signals including power generated by the power transmitter; and a plurality of resonance elements that have different resonance frequencies and are provided where they can be coupled with the power feeding element by electromagnetic induction.

Claims

1. A power feeding device comprising:

a power transmitter configured to generate a plurality of transmission signals having different frequencies from each other, the plurality of transmission signals including at least one power signal corresponding to power;

a power feeding element that is fed with the plurality of transmission signals generated by the power transmitter; and

a plurality of resonance elements that (i) are separate from each other with each having a unique resonance frequency that is different from that of any other resonance element in the plurality of resonance elements, (ii) radiate respective magnetic fields using magnetic field resonance, and (iii) are coupled with the power feeding element and receive from the power feeding element the plurality of transmission signals by electromagnetic induction.

2. The power feeding device of claim 1, wherein the plurality of resonance elements are disposed such that one resonance element is disposed on each side of the power feeding element.

3. The power feeding device of claim 1, wherein the plurality of resonance elements are disposed around the power feeding element.

4. The power feeding device of claim 1, wherein the plurality of resonance elements are disposed concentrically one above the other.

5. The power feeding device of claim 1, wherein the plurality of transmission signals include a modulated signal generated at one frequency and the power signal generated at another different frequency.

6. The power feeding device of claim 1, wherein the plurality of transmission signals include a plurality of power signals having different frequencies from each other.

7. A wireless power feeding system comprising:

a power feeding device, the power feeding device including

(a) a power transmitter configured to generate the plurality of transmission signals having different frequencies from each other, the plurality of transmission signals including at least one power signal corresponding to power,

(b) a power feeding element that is fed with the plurality of transmission signals generated by the power transmitter, and

(c) a plurality of resonance elements that (i) are separate from each other with each having a unique resonance frequency that is different from that of any other resonance element in the plurality of resonance elements, and that (ii) are coupled with the power feeding element and receive from the power feeding element the plurality of transmission signals by electromagnetic induction; and

a power receiving device configured to receive from the power feeding device, via magnetic field resonance, the plurality of transmission signals,

wherein,

in the power feeding device, each resonance element is configured to receive a different transmission signal out of the plurality of transmission signals for transmission at a respective resonance frequency of the resonance element, and

the power receiving device includes at least a second plurality of resonance elements that are separate from each other and configured to receive the plurality of transmission signals from the first plurality of resonance elements via the magnetic field resonance, each resonance element in the second plurality of resonance elements having a unique resonance frequency corresponding to one of the resonance frequencies of the resonance elements in the first plurality of resonance elements.

8. The wireless power feeding system of claim 7, wherein the plurality of transmission signals include a modulated signal generated at one frequency and the power signal generated at another different frequency.

9. The wireless power feeding system of claim 7, wherein the plurality of transmission signals include a plurality of power signals having different frequencies from each other.

10. The wireless power feeding system of claim 7, wherein the power receiving device includes a power receiver configured to process a modulated signal received at one frequency and the power signal received at another different frequency.

11. The wireless power feeding system of claim 7, wherein:

the plurality of transmission signals include a plurality of power signals having different frequencies from each other, and

the power receiving device includes a power receiver configured to process the plurality of power signals at the different frequencies.