Coil structure and wireless power transmitter using the same

• US 20160189848A1
• Filed: 12/23/2015
• Published: 06/30/2016
• Est. Priority Date: 12/24/2014
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Nam, Isaac
• Granted Patent: US 10,210,994 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01F 27/38 Auxiliary core members; Auxiliary coils or windings
• 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 50/12 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

A coil structure may include a first coil wound on one plane, at least one second coil wound around the first coil, and at least one third coil wound around the first coil in a direction which is perpendicular to a winding direction of the at least one second coil.

Claims

1. A coil structure comprising:

a first coil wound on one plane;

at least one second coil wound around the first coil; and

at least one third coil wound around the first coil in a direction perpendicular to a winding direction of the at least one second coil.

2. The coil structure of claim 1, wherein the first coil is wound in a quadrangular shape.

3. The coil structure of claim 1, wherein the at least one second coil is wound around the first coil on the exterior of the first coil.

4. The coil structure of claim 1, wherein the at least one second coil is wound around the first coil in a circular shape or an oval shape.

5. The coil structure of claim 4, wherein the at least one third coil is wound around the first coil and the at least one second coil in the circular shape or the oval shape.

6. The coil structure of claim 1, wherein the at least one second coil comprises a pair of second coils wound around the first coil in parallel with each other.

7. The coil structure of claim 6, wherein the at least one third coil comprises a pair of third coils wound around the first coil to be perpendicular to the pair of second coils and to be disposed in parallel relation with each other.

8. The coil structure of claim 1, wherein the first coil is configured to be magnetically coupled to an external wireless power receiving coil to wirelessly transmit power, and

the at least one second coil forms a loop circuit, the at least one second coil is configured to have the same resonance frequency as a resonance frequency of the first coil.

20. The coil structure of claim 1, further comprising a processor configured to adaptively reconfigure at least one of an electrical connection or operational parameter of at least one of the coils.

9. A wireless power transmitter wirelessly radiating power, the wireless power transmitter comprising:

an inverter configured to provide resonance power; and

a resonator configured to resonate according to the resonance power to wirelessly provide non-contact type power,

wherein the resonator comprises;

a first coil wound on one plane;

at least one second coil wound around the first coil; and

at least one third coil wound around the first coil in a direction perpendicular to a winding direction of the at least one second coil.

10. The wireless power transmitter of claim 9, wherein the at least one second coil is wound around the first coil on the exterior of the first coil.

11. The wireless power transmitter of claim 9, wherein the at least one second coil is wound around the first coil in a circular shape or an oval shape.

12. The wireless power transmitter of claim 11, wherein the at least one third coil is wound around the first coil and the at least one second coil in the circular shape or the oval shape.

13. The wireless power transmitter of claim 9, wherein the at least one second coil comprises a pair of second coils wound around the first coil in parallel with each other.

14. The wireless power transmitter of claim 13, wherein the at least one third coil comprises a pair of third coils wound around the first coil to be perpendicular to the pair of second coils and be in parallel with each other.

15. The wireless power transmitter of claim 9, wherein the first coil is configured to be magnetically coupled to an external wireless power receiving coil to wirelessly transmit power, and

the at least one second coil and the at least one third coil respectively form a loop circuit.

16. The wireless power transmitter of claim 15, wherein the at least one second coil and the at least one third coil are configured to amplify an output signal of the first coil, and to have the same resonance frequency as a resonance frequency of the first coil.

19. The wireless power transmitter of claim 9, further comprising a processor configured to adaptively reconfigure at least one of an electrical connection or operational parameter of at least one of the coils.

17. A wireless power transmitter wirelessly transmitting power, the wireless power transmitter comprising:

a first coil wound on one plane;

at least one second coil wound around the first coil;

at least one third coil wound around the first coil in a direction perpendicular to a winding direction of the at least one second coil; and

,

a processor configured to adaptively reconfigure at least one of an electrical connection or operational parameter of at least one of the coils.

18. The wireless power transmitter of claim 17, wherein the processor is further configured to adaptively reconfigure responsive to at least one of a sensed feedback from at least one of the coils or a user setting, or combinations thereof.