COIL RESONANT COUPLER FOR SHORT DISTANCE WIRELESS POWER COMMUNICATION AND SHORT DISTANCE WIRELESS POWER TRANSMITTING APPARATUS INCLUDING THE SAME

• US 20130069587A1
• Filed: 01/07/2011
• Published: 03/21/2013
• Est. Priority Date: 11/30/2010
• Status: Active Grant

• Current Assignee: GE Hybrid Technologies, LLC
• Original Assignee: Hanrim Postech Co., Ltd.
• Inventors: Kuk, Yoon-Sang
• Granted Patent: US 9,577,447 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• 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 50/12 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 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

Disclosed herein are a coil resonant coupler for short distance wireless power communication and a short distance wireless power transmitting apparatus comprising the same. The coil resonant coupler for short distance wireless power communication comprises a first coil installed perpendicularly to a first axis; a second coil installed perpendicularly to a second axis perpendicular to the first axis; and a third coil installed perpendicularly to a third axis perpendicular to each of the first and second axes. The short distance wireless power transmitting apparatus comprises a primary side core comprising the above-described coil resonant coupler, a position sensing unit which senses a position of the wireless power receiving apparatus to generate position information, and a transmission controlling unit which controls the primary side core based on the position information.

Claims

1. A coil resonant coupler for short distance wireless power communication, comprising:

a first coil installed perpendicularly to a first axis;

a second coil installed perpendicularly to a second axis perpendicular to the first axis; and

a third coil installed perpendicularly to a third axis perpendicular to each of the first and second axes.

2. The coil resonant coupler of claim 1, wherein the first to third coils are annular coils having the same shape.

3. The coil resonant coupler of claim 2, further comprising a magnetic focusing plate formed on the same plane as that of the first coil and installed at an inner side of the first coil.

4. The coil resonant coupler of claim 3, wherein the magnetic focusing plate comprises ferrite.

5. The coil resonant coupler of claim 3, wherein the magnetic focusing plate has a meta-material structure.

6. The coil resonant coupler of claim 2, wherein cross sections of the first to third coils have a square shape, a circular shape, or an oval shape.

7. A short distance wireless power transmitting apparatus, comprising:

a primary side core comprising the coil resonant coupler for short distance wireless power communication of claim 1;

a position sensing unit which senses a position of the wireless power receiving apparatus to generate position information; and

a transmission controlling unit which controls the primary side core based on the position information received from the position sensing unit.

8. The short distance wireless power transmitting apparatus of claim 7, wherein the transmission controlling unit controls a decoupling of least one of the first to third coils based on a position vector information of the position information.

9. The short distance wireless power transmitting apparatus of claim 7, wherein the transmission controlling unit controls a generation of power signal with respect to at least one of the first to third coils based on the position vector information of the position information.

10. The short distance wireless power transmitting apparatus of claim 7, wherein the position sensing unit generates a pulse signal through one or more of the first to third coils, receives a response signal to the pulse signal through one or more of the first to third coils, and analyzes the response signal to generate the position information.

11. The short distance wireless power transmitting apparatus of claim 7, wherein the position sensing unit is an ultrasonic sensor.