Resonating apparatus with increased isolation for stable wireless power transmission

• US 9,837,826 B2
• Filed: 09/16/2014
• Issued: 12/05/2017
• Est. Priority Date: 09/16/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Jae Hyun, Kim, Dong Zo, Ryu, Young Ho, Kwon, Sang Wook, Kim, Ki Young, Kim, Nam Yun, Kim, Bong Chul, Park, Yun Kwon, Song, Keum Su, Ahn, Chi Hyung, Lee, Byoung Hee
• Primary Examiner(s): Chang, Joseph
• Application Number:
  US14/487,603
• Publication Number:
  US 20150076921A1
• Time in Patent Office: 1,176 Days
• Field of Search: 307104
• 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
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection

Abstract

A resonator has an increased isolation for stable wireless power transmission. A material that reduces resonance coupling may be disposed in a space between each of a plurality of resonators and a resonator adjacent to each of the plurality of resonators. A material that reduces resonance coupling may be disposed on a plane opposite to a direction in which a resonator resonates. Power at an operating frequency set to be equal to or within a predetermined range of a frequency corresponding to a resonant mode may be injected into a plurality of transmission resonators.

Claims

1. A resonating apparatus for wireless power transmission, the resonating apparatus comprising:

a plurality of resonators separated from each other on a same plane; and

a material disposed between each of the plurality of resonators or disposed on a plane opposite to a direction in which the plurality of resonators are configured to resonate,

wherein the material is disposed to decrease an effect of a magnetic field generated by adjacent resonators of the plurality of the resonators on wireless power transmission.

2. The resonating apparatus of claim 1, wherein the material comprises either one or both of a magnetic material and a conductor.

3. A resonating apparatus comprising:

a plurality of resonators disposed on a same plane;

wherein the plurality of resonators are disposed to overlap a portion of an adjacent resonator of the plurality of resonators to reduce resonance coupling with the adjacent resonator,

wherein a first area overlapping adjacent resonators of the plurality of resonators and a second area not overlapping adjacent resonators of the plurality of resonators are determined based on a magnetic field in the first area and a magnetic field in the second area.

4. The resonating apparatus of claim 3, wherein the plurality of resonators are disposed to reduce resonance coupling between each of the plurality of resonators and an adjacent resonator of the plurality of resonators based on a characteristic that a direction of a magnetic field of an overlapping area in each of the plurality of resonators in which each of the plurality of resonators overlaps the adjacent resonator is opposite to a direction of a magnetic field of a non-overlapping area in each of the plurality of resonators in which each of the plurality of resonators does not overlap the adjacent resonator.

5. The resonating apparatus of claim 3, wherein the plurality of resonators are disposed to minimize an H-field surface integral value of each of the plurality of resonators.

6. The resonating apparatus of claim 3, wherein at least one of the plurality of resonators is divided into two areas having mutual fluxes in opposite directions, the two areas being disposed to cause absolute values of the mutual fluxes of the two areas to be equal to one another or within a predetermined range of one another.

7. The resonating apparatus of claim 3, wherein the plurality of resonators comprise at least three resonators.

8. A transmission resonating apparatus comprising:

a plurality of transmission resonators disposed on a same plane, each of the plurality of transmission resonators being configured to form a resonant mode with an adjacent transmission resonator among the plurality of transmission resonators; and

a feeder configured to inject power into the plurality of transmission resonators at an operating frequency set to decrease resonance coupling between each of the plurality of transmission resonators and the adjacent transmission resonator based on the resonant mode.

9. The transmission resonating apparatus of claim 8, wherein a difference between the operating frequency and a frequency corresponding to the resonant mode is than or equal to a predetermined value.

10. The transmission resonating apparatus of claim 8, wherein the resonant mode comprises either one or both of an even mode in which a magnetic field generated in each of the plurality of transmission resonators and a magnetic field generated in the adjacent transmission resonator have a same direction, and an odd mode in which the magnetic field generated in each of the plurality of transmission resonators and the magnetic field generated in the adjacent transmission resonator have opposite directions.

11. The transmission resonating apparatus of claim 10, wherein the resonant mode is the even mode;

and

a difference between the operating frequency and a frequency corresponding to the even mode is less than or equal to a predetermined value.

12. The transmission resonating apparatus of claim 10, wherein the resonant mode is the odd mode;

and

a difference between the operating frequency and a frequency corresponding to the odd mode is less than or equal to a predetermined value.

13. The transmission resonating apparatus of claim 8, wherein the plurality of transmission resonators are connected in parallel with each other;

and

the feeder is connected in series with the plurality of transmission resonators connected in parallel with each other to inject power at the set operating frequency into the plurality of transmission resonators.

14. The transmission resonating apparatus of claim 8, wherein the plurality of transmission resonators are connected in series with each other;

and

the feeder is connected in parallel with the plurality of transmission resonators connected in series with each other to inject power at the set operating frequency into the plurality of transmission resonators.

15. The transmission resonating apparatus of claim 8, wherein the feeder is further configured to inject power at the set operating frequency into the plurality of transmission resonators via inductive coupling.