APPARATUS FOR RADIATIVE WIRELESS POWER TRANSMISSION AND WIRELESS POWER RECEPTION

• US 20150180442A1
• Filed: 03/06/2015
• Published: 06/25/2015
• Est. Priority Date: 08/24/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: RYU, Young Ho, PARK, Eun Seok, KWON, Sang Wook, PARK, Jae Hyun, PARK, Byung Chul, LEE, Jung Hae
• Granted Patent: US 9,673,666 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 50/12 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H03H 7/40 Automatic matching of load impedance to source impedance
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Provided is an apparatus that may control a direction of wireless power transmission. A radiative wireless power transmitter may include at least two first unit resonators to form a magnetic field with a target resonator based on an x-axis direction and a z-axis direction, and to transmit a resonance power to the target resonator, at least two second unit resonators to form a magnetic field with the target resonator based on the x-axis direction and a y-axis direction, and to transmit a resonance power to the target resonator, at least two third unit resonators to form a magnetic field with the target resonator based on the y-axis direction and the z-axis direction, and to transmit a resonance power to the target resonator, and a feeding unit to control resonance power transmission of the at least two first unit resonators, the at least two second unit resonators, and the at least two

Claims

1. A radiative wireless power transmitter, comprising:

a plurality of unit resonators configured to transmit a resonance power to target device;

a plurality of matchers configured to enable the plurality of unit resonators to form a magnetic field with at least one target resonator of the target device; and

a feeding unit configured to determine a transmission direction of the resonance power based on control of at least one of the plurality of matchers.

2. The radiative wireless power transmitter of claim 1, wherein the plurality of unit resonators comprises:

first unit resonators configured to form a magnetic field with the target resonator based on an x-axis direction and a z-axis direction;

second unit resonators configured to form a magnetic field with the target resonator based on the x-axis direction and a y-axis direction; and

third unit resonators configured to form a magnetic field with the target resonator based on the y-axis direction and the z-axis direction.

3. The radiative wireless power transmitter of claim 1, wherein one of the plurality of unit resonators is parallel with one of XY plane, YZ plane, and ZX plane.

4. The radiative wireless power transmitter of claim 1, wherein the feeding unit controls the at least one of the plurality of matchers to form a magnetic field in a predetermined direction.

5. The radiative wireless power transmitter of claim 1, wherein the feeding unit control of at least one of the plurality of matchers to enable the at least one of the plurality of unit resonators to transmit the resonance power to target resonator that faces the at least one of the plurality of unit resonators.

6. The radiative wireless power transmitter of claim 1, wherein at least one of the plurality of matchers is placed in a plane that is parallel with at least one of the plurality of unit resonators.

7. The radiative wireless power transmitter of claim 1, wherein at least one of the plurality of unit resonators comprises:

a transmission line that comprises a first signal conducting portion, a second signal conducting portion, and a ground conducting portion corresponding to the first signal conducting portion and the second signal conducting portion;

a first conductor that is electrically connected to the first signal conducting portion and the ground conducting portion;

a second conductor that is electrically connected to the second signal conducting portion and the ground conducting portion; and

at least one capacitor inserted between the first signal conducting portion and the second signal conducting portion in series with respect to a current flowing through the first signal conducting porting and the second signal conducting portion.

8. The radiative wireless power transmitter of claim 1, further comprising:

a controller configured to control impedances of the a plurality of unit resonators.

9. A radiative wireless power receiver, comprising:

a plurality of unit resonators configured to receive a resonance power from source device; and

a feeding unit configured to control at least one of a plurality of matcher to enable wireless power reception to be performed in a predetermined direction.

10. The radiative wireless power receiver of claim 9, wherein the plurality of unit resonators comprise:

first unit resonators configured to form a magnetic field with a source resonator based on an x-axis direction and z-axis direction;

second unit resonators configured to form a magnetic field with the source resonator based on the x-axis direction and a y-axis direction;

third unit resonators configured to form a magnetic field with the source resonator based on the y-axis direction and the z-axis direction.

11. The radiative wireless power receiver of claim 9, further comprising:

a detector configured to detect at least one of a distance between a wireless power transmission resonator and a wireless power reception resonator, a reflection coefficient of a wave emitted from the wireless power transmission resonator to the wireless power reception resonator, a power transmission gain between the wireless power transmission resonator and the wireless power reception resonator, and a coupling efficiency.