Reconfigurable distributed active wireless charging system

• US 10,224,142 B2
• Filed: 02/24/2015
• Issued: 03/05/2019
• Est. Priority Date: 02/03/2015
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Inventors: Yoon, Seunghwan
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US14/630,315
• Publication Number:
  US 20160226292A1
• Time in Patent Office: 1,470 Days
• Field of Search: 320108
• CPC Class Codes: H01F 2027/2809 on stacked layers
• CPC Class Codes: H01F 27/2804 Printed 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 50/005 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 50/10 using inductive coupling
• 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

Abstract

A system and method utilizes an array of unit coils for wireless charging and/or near field communication. The array of unit coils can be configured to provide magnetic fields of various shapes to accommodate consuming devices and/or to accommodate types of devices. The array of unit coils can be any type of coils (e.g., eccentric coils that provide a concentrated current field and a strong magnetic field). The array of unit coils can be powered by one or more power sources.

Claims

1. A method of charging a device, comprising:

configuring an array of unit coils to charge the device, wherein each unit coil comprises;

a first coil configured to provide a first magnetic field in a first direction to charge the device; and

a second coil configured to provide a second magnetic field in a second direction to charge the device, wherein the first direction is perpendicular to the second direction, wherein the first coil and the second coil are orthogonal, wherein at least a portion of conductors of the first coil passes through the second coil; and

providing a magnetic field via the first coils and the second coils of the array of unit coils.

2. The method of claim 1, wherein the first coil for each unit coil is disposed in a first orientation and the second coil for each unit coil is disposed in a second orientation, the first and second orientations being different from each other.

3. The method of claim 2, wherein the first orientation has a first coil center line that is vertical and the second orientation has a second coil center line that is horizontal.

4. The method of claim 3, wherein the first coil is disposed on a printed circuit board substrate and the second coil is disposed on the printed circuit board substrate, wherein the first coil comprises at least one conductor provided through the second coil and the second coil comprises at least one conductor provided through the first coil.

5. The method of claim 1, wherein each unit coil comprises a printed circuit board coil arranged in a planar eccentric shape, whereby a negative effect due to opposite currents are reduced.

6. The method of claim 1, wherein the array of unit coils is configured for a multiple device charging mode or a single device charging mode.

7. The method of claim 1, wherein the array of unit coils is automatically configured by sensing a mobile device type.

8. A magnetic induction device, comprising:

an array of unit coils configured for coupling separately to a power source to charge a device, each unit coil comprising;

a first coil configured to provide a first magnetic field in a first direction to charge the device; and

a second coil configured to provide a second magnetic field in a second direction to charge the device, wherein the first direction is perpendicular to the second direction, wherein the first coil and the second coil are orthogonal, wherein the array of unit coils is configurable to provide a magnetic field using the first coils and the second coils, wherein at least a portion of conductors of the first coil passes through the second coil.

9. The device of claim 8, wherein the magnetic field provided by the array of unit coils is used for charging device.

10. The device of claim 8, wherein each unit coil comprises dual planar dual eccentric coils.

11. The device of claim 8, wherein the first and second coils are planar rectangular eccentric coils.

12. The device of claim 11, wherein the rectangular eccentric coils having outside flux lines at least partially arranged in a nonparallel fashion.

13. The device of claim 8, wherein the first coil is disposed in a first orientation and the second coil is disposed in a second orientation, the first and second orientations directions being in different planes, wherein the first coil is a disposed on a printed circuit board substrate and the second coil is disposed on the printed circuit board substrate, wherein the first coil is configured in a planar eccentric pattern and the second coil is configured in a planar eccentric pattern.

14. The device of claim 8, wherein the unit coils are configured to be coupled in a parallel to the power source.

15. The device of claim 8, wherein the first and second coils of each unit coil are arranged as a pair of eccentric coils.

16. A magnetic induction device, comprising:

an array of unit cells configured to charge a device, each unit cell comprising a pair of eccentric coils disposed perpendicular to each other, wherein each eccentric coil is configured with a center concentrated structure and configured to provide a center concentrated magnitude field, the center concentrated magnetic fields of the pair of eccentric coils configured to charge the device, wherein at least a portion of conductors of a first eccentric coil of the pair of eccentric coils passes through a second eccentric coil of the pair of eccentric coils.

17. The device of claim 16, wherein the array of unit cells provides a magnetic field with a three ring flux path using the pairs of eccentric coils.

18. The device of claim 17, wherein each flux path of the three flux ring path is rectangular.

19. The device of claim 16, wherein the array of unit cells provides a plurality of flux paths, wherein each flux path is arranged for one of a plurality of device types.

20. The device of claim 19, wherein a device type is sensed and the flux path is automatically arranged according to the device type.