CORE ASSEMBLY FOR WIRELESS POWER TRANSMITTING DEVICE AND WIRELESS POWER TRANSMITTING DEVICE HAVING THE SAME

• US 20130015719A1
• Filed: 07/16/2012
• Published: 01/17/2013
• Est. Priority Date: 07/14/2011
• Status: Active Grant

• Current Assignee: GE Hybrid Technologies, LLC
• Original Assignee: GE Hybrid Technologies, LLC
• Inventors: Jung, Chun-Kil, Kuk, Yoon-Sang
• Granted Patent: US 9,906,274 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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
• 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: H04B 5/263 Multiple coils at either side
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A core assembly used for a wireless power transmitting device and a wireless power transmitting device having the same. The core assembly for the wireless power transmitting device includes: a main coil disposed at a first level; an auxiliary coil disposed at a lower side of the main coil such that the auxiliary coil is located at a second level lower than the first level, and including a first sub coil and a second sub coil, which respectively have a portion overlapped with the main coil and respectively have a size smaller than the main coil; and a core of a magnetic substance configured to accommodate the main coil and the auxiliary coil.

Claims

1. A core assembly for a wireless power transmitting device, comprising:

a main coil disposed at a first level;

an auxiliary coil disposed at a lower side of the main coil such that the auxiliary coil is located at a second level lower than the first level, and including a first sub coil and a second sub coil, which respectively have a portion overlapped with the main coil and respectively have a size smaller than the main coil; and

a core of a magnetic substance configured to accommodate the main coil and the auxiliary coil.

2. The core assembly of claim 1, wherein the first sub coil and the second sub coil are disposed to contact a lower surface of the main coil.

3. The core assembly of claim 2, wherein a width of the main coil in a first direction is longer than each width of the first sub coil and the second sub coil in the first direction.

4. The core assembly of claim 3, wherein the main coil is disposed to cover a portion of each upper surface of the first sub coil and the second sub coil and to expose a rest area excluding the covered portion.

5. The core assembly of claim 3, wherein the width of the main coil in the first direction is shorter than a sum of the widths of the first sub coil and the second sub coil in the first direction.

6. The core assembly of claim 5, wherein the width of the main coil in the first direction is 60 to 80% of the sum of the widths of the first sub coil and the second sub coil in the first direction.

7. The core assembly of claim 3, wherein a width of the main coil in a second direction is the same as each width of the first sub coil and the second sub coil in a second direction.

8. The core assembly of claim 7, wherein the width of the first sub coil in the first direction is configured to be the same as that of the second sub coil in the first direction.

9. The core assembly of claim 8, wherein a line that neighboring surfaces of the first sub coil and the second sub coil meet corresponds to a line passing a center of the main coil.

10. The core assembly of claim 7, wherein the second direction is perpendicular to the first direction.

11. The core assembly of claim 1, wherein the auxiliary coil comprises:

a base as an insulator disposed at the lower side of the main coil; and

a conductive pattern disposed at a surface facing the main coil of the base to include a first conductive pattern forming the first sub coil and a second conductive pattern forming the second sub coil.

12. The core assembly of claim 1, wherein a concave portion accommodating the main coil and the auxiliary coil, and a side wall defining the concave portion are formed at one surface of the core.

13. The core assembly of claim 12, wherein a plurality of extension grooves, at which a passage that an end portion of the main coil and the auxiliary coil extends out of the concave portion is formed, are configured at the side wall.

14. A wireless power transmitting device, comprising:

a core assembly according to claim 1; and

a transmitting controller for controlling transmission of a wireless power signal via the main coil and the auxiliary coil.

15. The wireless power transmitting device of claim 14, wherein the transmitting controller controls such that power is simultaneously applied to any one of the first sub coil and the second sub coil along with the main coil.