Wireless power transmission system based on cell division

• US 9,413,429 B2
• Filed: 09/14/2012
• Issued: 08/09/2016
• Est. Priority Date: 11/29/2011
• Status: Expired due to Fees

• 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
• Primary Examiner(s): Whitmore, Stacy
• Application Number:
  US13/615,976
• Publication Number:
  US 20130134927A1
• Time in Patent Office: 1,425 Days
• Field of Search: 320107-108
• US Class Current: 1/1
• 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:

comparing a transmission efficiency to a target device from a source device and a transmission efficiency to the target device from another neighboring source device, through communicating with the target device and the another neighboring source device;

determining that whether the target device is in a magnetic coupling zone of the source device based on the comparison; and

transmitting, by the source device, a power to the target device if the target device is in the magnetic coupling zone of the source device.

2. The method of claim 1, further comprising

setting the magnetic coupling zone based on the comparison.

3. The method of claim 1, further comprising

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

4. The method of claim 1, further 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.

5. The method of claim 4, 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.

6. The method of claim 1, further comprising adjusting an amount of the power based on a transmission efficiency of the power, 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.

7. The method of claim 1, wherein the source device receives a power from an AC voltage output from a power supply, and wirelessly transmits the power to the target device.