Wireless power transmitter

• US 10,277,069 B2
• Filed: 07/31/2015
• Issued: 04/30/2019
• Est. Priority Date: 08/01/2014
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Chang, Ki Won, Kim, Si Hyung, Han, Hee Sun, Kim, Ji Hoon, Lee, Sung Uk, Han, Chang Mok, Seo, Duk Won, Shin, Eun Young, Lim, Hyun Keun, Nam, Isaac
• Primary Examiner(s): Tran, Thienvu V
• Assistant Examiner(s): Sun, Pinping
• Application Number:
  US14/815,272
• Publication Number:
  US 20160036245A1
• Time in Patent Office: 1,369 Days
• 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 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/23 characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• 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 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

A wireless power transmitter includes a case including a base plate and a structure disposed on the base plate; and a transmitting coil having a three-dimensional spiral shape disposed on a side surface of the structure and configured to generate a magnetic field in a direction perpendicular to the side surface of the structure.

Claims

1. A wireless power transmitter comprising:

a case comprising a base plate and a structure disposed on the base plate;

a slot formed in a side surface of the structure and extending in a direction perpendicular to the base plate;

a first coil having a spiral shape disposed on the side surface of the structure and configured to generate a magnetic field in a direction perpendicular to the side surface of the structure,

wherein a portion of the first coil is disposed in the slot in a direction that is parallel to the base plate.

2. The wireless power transmitter of claim 1, wherein the first coil is constituted by a single wire.

3. The wireless power transmitter of claim 1, wherein the first coil comprises a plurality of layers in the direction perpendicular to the side surface of the structure.

4. The wireless power transmitter of claim 1,

wherein a portion of the first coil extending in the direction perpendicular to the base plate is disposed in the slot.

5. The wireless power transmitter of claim 1, wherein a first end of the structure is disposed on the base plate;

and

the wireless power transmitter further comprises a second coil having a spiral shape disposed on an end surface of the structure, wherein the end surface of the structure is at a second end of the structure opposite to the first end of the structure.

6. The wireless power transmitter of claim 5, wherein the first coil and the second coil are constituted by a single wire that forms both the first coil and the second coil.

7. The wireless power transmitter of claim 5, wherein the structure comprises a slot formed in the side surface of the structure and extending in a direction perpendicular to the base plate;

and

a portion of the first coil extending in the direction perpendicular to the base plate is disposed in the slot.

8. The wireless power transmitter of claim 1, further comprising a second coil having a spiral shape disposed on the side surface of the structure so that the second coil does not overlap the first coil and the second coil is configured to generate a magnetic field of the second coil in the direction perpendicular to the side surface of the structure.

9. The wireless power transmitter of claim 8, wherein the structure comprises a slot formed in the side surface of the structure and extending in a direction perpendicular to the base plate;

and

a portion of the first coil extending in the direction perpendicular to the base plate and a portion of the second coil extending in the direction perpendicular to the base plate are disposed in the slot.

10. The wireless power transmitter of claim 1, wherein the structure comprises a groove formed in the side surface of the structure and extending in a direction perpendicular to the base plate;

and

an end portion of the first coil is disposed in the groove.

11. The wireless power transmitter of claim 1, wherein portions of the first coil extending in a direction perpendicular to the base plate overlap each other.

12. The wireless power transmitter of claim 11, wherein the structure comprises a groove formed in the side surface of the structure and extending in the direction perpendicular to the base plate;

and

at least a portion of the first coil extending in the direction perpendicular to the base plate is disposed in the groove.

13. The wireless power transmitter of claim 1, wherein portions of the first coil overlap each other.

14. The wireless power transmitter of claim 1, wherein the first coil comprises a plurality of windings;

and

an inter-winding spacing of the first coil increases toward a center of the first coil.

15. The wireless power transmitter of claim 1, further comprising a transmitting core disposed in the structure.

16. The wireless power transmitter of claim 1, further comprising a transmitting core disposed in the base plate.

17. A wireless power transmitter comprising:

a base plate;

a structure disposed on a surface of the base plate, the structure comprising a slot formed in a side surface of the structure and extending in a direction perpendicular to the first plurality of directions of the first magnetic field; and

a first coil disposed on the side surface of the structure, the side surface of the structure extending away from the surface of the base plate, the first coil being configured to generate a first magnetic field in a first plurality of directions parallel to the surface of the base plate,

wherein a portion of the first coil is disposed in the slot in a direction that is parallel to the base plate.

18. The wireless power transmitter of claim 17, wherein a first end of the structure is disposed on the surface of the base plate;

and

the wireless transmitter further comprises a second coil disposed on an end surface of the structure, wherein the end surface of the structure is at a second end of the structure opposite to the first end of the structure, the second coil being configured to generate a magnetic field of the second coil perpendicular to the end surface of the structure.

19. The wireless power transmitter of claim 17, further comprising a second coil disposed on the side surface of the structure so that the second coil does not overlap the first coil, the second coil being configured to generate a second magnetic field in a second plurality of directions parallel to the surface of the base plate, wherein the second plurality of directions are different from the first plurality of directions of the first coil.

20. The wireless power transmitter of claim 17,

wherein a portion of the first coil extending in the direction in which the slot extends is disposed in the slot.