WIRELESS POWER TRANSMISSION SYSTEM BASED ON CELL DIVISION

• US 20130134927A1
• Filed: 09/14/2012
• Published: 05/30/2013
• Est. Priority Date: 11/29/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: PARK, Eun Seok, KWON, Sang Wook, KIM, Ki Young, KIM, Nam Yun, KIM, Dong Zo, PARK, Yun Kwon, RYU, Young Ho, YOON, Chang Wook, CHOI, Jin Sung, HONG, Young Tack
• Granted Patent: US 9,413,429 B2
• Time in Patent Office: Days
• US Class Current: 320/107
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• 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: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless power transmission system based on cell division is provided. A communication and power control method of the wireless power transmission system, includes setting a magnetic coupling zone. The method further includes detecting a target device in the magnetic coupling zone. The method further includes transmitting a power to the target device. The method further includes adjusting an amount of the power based on a transmission efficiency of the power.

Claims

1. A communication and power control method of a wireless power transmission system, comprising:

setting a magnetic coupling zone;

detecting a target device in the magnetic coupling zone;

transmitting a power to the target device; and

adjusting an amount of the power based on a transmission efficiency of the power.

2. The method of claim 1, wherein the setting of the magnetic coupling zone comprises:

communicating with a neighboring source device; and

setting the magnetic coupling zone based on the communication.

3. The method of claim 1, wherein the setting of the magnetic coupling zone comprises:

comparing the transmission efficiency to a power transmission efficiency of a neighboring source device; and

setting the magnetic coupling zone based on the comparison.

4. The method of claim 1, wherein the setting of the magnetic coupling zone comprises:

setting the magnetic coupling zone based on a distance within which power transmission is possible.

5. The method of claim 1, wherein the detecting of the target device comprises:

transmitting, to the target device, a wake-up request signal for an initial communication; and

receiving, from the target device, an acknowledgement signal in response to the wake-up request signal.

6. The method of claim 5, further comprising:

receiving, from the target device, information on a receiving sensitivity of the wake-up request signal, or information on a receiving level of the power to be used to charge the target device, or any combination thereof; and

determining the transmission efficiency based on the information on the receiving sensitivity, or the information on the receiving level, or any combination thereof.

7. The method of claim 1, wherein the adjusting of the amount of the power comprises:

transmitting, to the target device, a power reception suspension request signal requesting disconnection of a load of the target device.

8. A power reception method of a wireless power transmission system, comprising:

receiving, from a first source device, a first charging power to be used to charge a target device, the target device located within a first magnetic coupling zone of the first source device; and

receiving, from the first source device, or a second source device, or any combination thereof, the first charging power, or a second charging power to charge the target device, or any combination thereof, respectively, based on a transmission efficiency of the first charging power and a transmission efficiency of the second charging power, if the target device moves to a second magnetic coupling zone of the second source device.

9. A power reception method of a wireless power transmission system, comprising:

receiving, by a target device, a power from a first source device, or a second source device, or any combination thereof, based on a transmission efficiency of the power,

wherein the target device is located within a coverage area of the first source device and within a power transmission area of the second source device.

10. The method of claim 9, further comprising:

receiving, from the first source device, a power reception suspension request signal requesting disconnection of a load of the target device; and

changing a resonance characteristic of the target device, or disconnecting the load, in response to the power reception suspension request signal.

11. A source device of a wireless power transmission system, comprising:

a controller configured to

set a magnetic coupling zone, and

detect a target device in the magnetic coupling zone; and

a source resonator configured to transmit a power to the target device,

wherein the controller is further configured to adjust an amount of the power based on a transmission efficiency of the power.

12. The source device of claim 11, wherein:

the power is to be used to charge the target device; and

the source resonator is further configured to transmit, to the target device, a wake-up power to be used to activate the target device.

13. The source device of claim 11, wherein the controller is further configured to:

communicate with a neighboring source device; and

set the magnetic coupling zone based on the communication.

14. The source device of claim 11, wherein the controller is further configured to:

compare the transmission efficiency to a power transmission efficiency of a neighboring source device; and

set the magnetic coupling zone based on the comparison.

15. The source device of claim 11, wherein the controller is further configured to:

set the magnetic coupling zone based on a distance within which power transmission is possible.

16. The source device of claim 11, wherein:

the source resonator is further configured to transmit, to the target device, a wake-up request signal for an initial communication; and

the controller is further configured to

receive, from the target device, information on a receiving sensitivity of the wake-up request signal, or information on a receiving level of the power to be used to charge the target device, or any combination thereof, and

determine the transmission efficiency based on information on the receiving sensitivity, or information on the receiving level, or any combination thereof.

17. The source device of claim 11, wherein the controller is further configured to:

transmit, to the target device, a power reception suspension request signal requesting disconnection of a load of the target device.

18. A target device of a wireless power transmission system, comprising:

a target resonator configured to receive, from a source device, a wake-up request signal and a power; and

a controller configured to

detect a receiving sensitivity of the wake-up request signal, or a receiving level of the power, or any combination thereof, and

report, to the source device, the receiving sensitivity, or the receiving level, or any combination thereof.

19. The target device of claim 18, wherein:

the power is to be used to charge the target device; and

the target resonator is further configured to receive, from the source device, a wake-up power to be used to activate the target device.

20. The target device of claim 18, further comprising:

a load; and

a switch unit configured to disconnect the load based on a control of the controller,

wherein the controller is further configured to

receive, from the source device, a power reception suspension request signal requesting disconnection of the load, and

change a resonance characteristic of the target device, or control the switch unit to disconnect the load, in response to the power reception suspension request signal.