Coil structure and wireless power transmitter using the same

• US 10,210,994 B2
• Filed: 12/23/2015
• Issued: 02/19/2019
• 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
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Vu, Toan
• Application Number:
  US14/757,508
• Publication Number:
  US 20160189848A1
• Time in Patent Office: 1,154 Days
• Field of Search: 307104
• 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 configured as a flat coil having plural coils wound radially in one plane;

a second coil wound around the first coil; and

a third coil wound around the first coil in a direction perpendicular to a winding direction of the second coil,

wherein the second coil and the third coil from a loop circuit that is configured to have a same resonance frequency as a resonance frequency of the first 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 second coil is wound around the first coil on an exterior of the first coil.

4. The coil structure of claim 1, wherein the 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 third coil is wound around the first coil and the second coil in the circular shape or the oval shape.

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

7. The coil structure of claim 6, wherein the third coil comprises a pair of third coils wound around the first coil to be perpendicular to the pair of second coils, the pair of third coils being 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.

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

22. The coil structure of claim 1, wherein the first coil is a main coil configured to transmit power, and the second and third coils are auxiliary coils configured to amplify a magnetic coupling of the main coil.

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, the resonator comprising;

a first coil wound in one plane;

a second coil wound around the first coil; and

a third coil wound around the first coil in a direction perpendicular to a winding direction of the second coil,

wherein the second coil and the third coil form a loop circuit that is configured to have a same resonance frequency as a resonance frequency of the first coil.

10. The wireless power transmitter of claim 9, wherein the 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 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 third coil is wound around the first coil and the second coil in the circular shape or the oval shape.

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

14. The wireless power transmitter of claim 13, wherein the third coil comprises a pair of third coils wound around the first coil to be perpendicular to the pair of second coils, the pair of third coils being 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 second coil and the third coil respectively form a loop circuit.

16. The wireless power transmitter of claim 15, wherein the second coil and the third coil are configured to amplify an output signal of the first coil.

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

21. The wireless power transmitter of claim 9, wherein the first coil is configured as a flat coil having plural coils wound radially in one plane.

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

a first coil having plural coils wound radially in one plane;

a second coil wound around the first coil;

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

,

a processor configured to adaptively reconfigure any one or both of an electrical connection or operational parameter of the first, second and third coils,

wherein the second coil and the third coil from a loop circuit that is configured to have a same resonance frequency as a resonance frequency of the first coil.

18. The wireless power transmitter of claim 17, wherein the processor is further configured to adaptively reconfigure responsive to any one or both of a sensed feedback from at least one of the first, second and third coils or a user setting.