WIRELESS POWER TRANSMISSION SYSTEM, WIRELESS POWER TRANSMISSION APPARATUS AND WIRELESS POWER RECEIVING APPARATUS THEREFOR

• US 20120188041A1
• Filed: 07/25/2011
• Published: 07/26/2012
• Est. Priority Date: 07/23/2010
• Status: Active Grant

• Current Assignee: GE Hybrid Technologies, LLC
• Original Assignee: Hanrim Postech Co., Ltd.
• Inventors: KOOK, Yoon-Sang
• Granted Patent: US 8,704,628 B2
• Time in Patent Office: Days
• US Class Current: 336/90
• 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 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

Provided are a wireless power communication system, including: a primary core where a primary coil, to which a current is applied, is wound; and a secondary core having a width wider than a width of the primary core, and receiving a secondary coil which outputs a current generated by a magnetic field, wherein the magnetic field is induced by the primary coil to the secondary coil, a wireless power transmission apparatus and a wireless power receiving apparatus therefor.

Claims

1. A wireless power communication system, comprising:

a primary core receiving a primary coil, to which a current is applied; and

a secondary core having a width wider than a width of the primary core, and receiving a secondary coil which outputs a current generated by a magnetic field, wherein the magnetic field is induced by the primary coil to the secondary coil.

2. The system according to claim 1, wherein the primary coil comprises:

a primary middle protruding portion where the primary coil is wound; and

a primary edge protruding portion spaced from the primary middle protruding portion, and surrounding the primary middle protruding portion, and

the secondary core comprises;

a secondary middle protruding portion where the secondary coil is wound; and

a secondary edge protruding portion spaced from the secondary middle protruding portion, and surrounding the secondary middle protruding portion.

3. The system according to claim 2, wherein when the primary and secondary middle protruding portions are disposed to face each other, the primary edge protruding portion is formed to be disposed between the secondary middle protruding portion and the secondary edge protruding portion.

4. The system according to claim 3, wherein the secondary edge protruding portion of the secondary core is formed to be protruded such that the secondary edge protruding portion surrounds a part of the primary edge protruding portion of the primary core.

5. The system according to claim 3, wherein two adjacent surfaces of the secondary edge protruding portion are disposed to face two adjacent surfaces of the primary edge protruding portion, respectively.

6. The system according to claim 3, further comprising:

a primary housing receiving the primary core,

wherein the primary housing includes a protruded portion corresponding to the primary edge protruding portion.

7. The system according to claim 3, further comprising:

a secondary housing receiving the secondary core,

wherein the secondary housing includes a recessed portion, into which the primary edge protruding portion is inserted.

8. The system according to claim 1, wherein the secondary coil is configured to output a current transformed by a turns ratio of the primary coil and the secondary coil.

9. The system according to claim 1, further comprising:

a driving mechanism for driving any one of the primary and secondary cores to move the one toward the other.

10. The system according to claim 9, further comprising:

a sensor for sensing whether any one of the primary and secondary cores approaches to the other,

wherein the driving mechanism is driven based on a sensing result of the sensor.

11. A wireless power transmission apparatus, comprising:

a primary coil where a magnetic field is induced by an applied current such that an output current of a secondary coil is induced; and

a primary core having a width narrower than a width of a secondary core where the secondary coil is wound, wherein the primary coil is wound to the primary core.

12. The wireless power transmission apparatus according to claim 11, wherein the primary core comprises:

a middle protruding portion where the primary coil is wound; and

an edge protruding portion spaced from the middle protruding portion, and surrounding the middle protruding portion.

13. The wireless power transmission apparatus according to claim 12, wherein the edge protruding portion of the primary core is partially surrounded by both ends of the secondary core.

14. The wireless power transmission apparatus according to claim 12, wherein a protrusion level of the edge protruding portion of the primary core is larger than a protrusion level of the middle protruding portion of the primary core.

15. The wireless power transmission apparatus according to claim 11, further comprising:

a driving mechanism for driving the primary core such that the primary core moves toward the secondary core.

16. The wireless power transmission apparatus according to claim 15, further comprising:

a sensor for sensing whether the secondary core is approached to the primary core,

wherein the driving mechanism is driven based on a sensing result of the sensor.

17. A wireless power receiving apparatus, comprising:

a secondary coil formed to output a current by a magnetic field induced by a current, which is applied to a primary coil; and

a secondary core having a width wider than a width of a primary core where the primary coil is wound, wherein the secondary coil is wound to the secondary core.

18. The wireless power receiving apparatus according to claim 17, wherein the secondary core comprises:

a middle protruding portion, which the secondary coil is wound to; and

an edge protruding portion spaced from the middle protruding portion and surrounding the middle protruding portion.

19. The wireless power receiving apparatus according to claim 18, wherein a protrusion level of the edge protruding portion of the secondary core is smaller than a protrusion level of the middle protruding portion of the secondary core.

20. The wireless power receiving apparatus according to claim 18, wherein the edge protruding portion of the secondary core partially surrounds both ends of the primary core.