WIRELESS POWER TRANSMISSION SYSTEM, AND METHOD OF CONTROLLING TRANSMISSION AND RECEPTION OF RESONANCE POWER

• US 20120112554A1
• Filed: 11/10/2011
• Published: 05/10/2012
• Est. Priority Date: 11/10/2010
• Status: Active Grant

• Current Assignee: Pantech Wireless, LLC (Ideahub, Inc.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Nam Yun, Kwon, Sang Wook, Park, Yun Kwon, Hong, Young Tack, Ryu, Young Ho, Kim, Dong Zo, Choi, Jin Sung, Park, Eun Seok
• Granted Patent: US 9,214,818 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/50 using additional energy repeaters between transmitting devices and receiving devices
• 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 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

A resonance power transmission system, and a method of controlling transmission and reception of a resonance power are provided. According to one embodiment, a method of controlling resonance power transmission in a resonance power transmitter may include: transmitting resonance power to a resonance power receiver, the resonance power having resonance frequencies which vary with respect to a plurality of time intervals; and receiving, from the resonance power receiver, information regarding the resonance frequency having the highest power transmission efficiency among the resonance frequencies used in the time intervals.

Claims

1. A method of controlling resonance power transmission in a resonance power transmitter, the method comprising:

transmitting resonance power to a resonance power receiver, the resonance power having resonance frequencies which vary with respect to a plurality of time intervals; and

receiving, from the resonance power receiver, information regarding the resonance frequency having the highest power transmission efficiency among the resonance frequencies used in the time intervals.

2. The method of claim 1, further comprising:

detecting the resonance power receiver.

3. The method of claim 1, further comprising:

generating the resonance power using the resonance frequency having the highest power transmission efficiency; and

transmitting the generated resonance power to the resonance power receiver.

4. The method of claim 1, wherein one or more of the resonance frequencies used in the time intervals are determined by scanning a frequency characteristic of a reflected wave, are determined based on a channel of a predetermined width, or are randomly determined in a predetermined bandwidth.

21. The method of claim 1, further comprising:

notifying the resonance power receiver of the resonance frequencies used in the time intervals, and of a power amount of the resonance power transmitted in one or more of the time intervals.

22. The method of claim 2, wherein the detecting comprises:

receiving an identifier (ID) of the resonance power receiver; and

recognizing the resonance power receiver based on the received ID.

23. The method of claim 1, wherein the time intervals comprise preset or predetermined time intervals.

5. A method of controlling resonance power transmission in a resonance power transmitter, the method comprising:

determining an order of a plurality of resonance power receivers;

transmitting first resonance power to a first resonance power receiver of the plurality of resonance power receivers based on the determined order, the first resonance power having resonance frequencies which vary for a plurality of time intervals;

receiving a first resonance frequency from the first resonance power receiver, the first resonance frequency having the highest power transmission efficiency for the first resonance power receiver among resonance frequencies used in the time intervals;

transmitting second resonance power to a second resonance power receiver of the plurality of resonance power receivers based on the determined order, the second resonance power having a resonance frequency variable for of time intervals; and

receiving a second resonance frequency from the second resonance power receiver, the second resonance frequency having the highest power transmission efficiency for the second resonance power receiver among the resonance frequencies used in the time intervals.

6. The method of claim 5, further comprising:

detecting the plurality of resonance power receivers.

7. The method of claim 5, further comprising:

generating the first resonance power using the first resonance frequency, and transmitting the first resonance power generated using the first resonance frequency to the first resonance power receiver in a first time interval; and

generating the second resonance power using the second resonance frequency, and transmitting the second resonance power generated using the second resonance frequency to the second resonance power receiver in a second time interval.

8. The method of claim 5, further comprising:

generating the first resonance power using the first resonance frequency, and transmitting the first resonance power generated using the first resonance frequency to the first resonance power receiver;

determining whether charging of the first resonance power receiver is completed; and

generating the second resonance power using the second resonance frequency, and transmitting the second resonance power generated using the second resonance frequency to the second resonance power receiver, when the charging of the first resonance power receiver is completed.

9. The method of claim 5, further comprising:

generating the first resonance power using the first resonance frequency, and transmitting the first resonance power generated using the first resonance frequency to the first resonance power receiver;

determining whether a report message is received from the first resonance power receiver within a predetermined period of time; and

generating the second resonance power using the second resonance frequency, and transmitting the second resonance power generated using the second resonance frequency to the second resonance power receiver, when the report message is not received within the predetermined period of time.

10. The method of claim 5, wherein one or more of the resonance frequencies used in the time intervals are determined by scanning a frequency characteristic of a reflected wave, are determined based on a channel of a predetermined width, or are randomly determined in a predetermined bandwidth.

11. A method of controlling resonance power reception in a resonance power receiver, the method comprising:

receiving resonance power from the resonance power transmitter, the resonance power having resonance frequencies which vary for a plurality of time intervals;

receiving information regarding resonance frequencies used in the time intervals;

detecting a resonance frequency having the highest power transmission efficiency among the resonance frequencies used in the time intervals; and

notifying the resonance power transmitter of the detected resonance frequency.

12. The method of claim 11, further comprising:

receiving, from the resonance power transmitter, resonance power generated using the detected resonance frequency.

13. The method of claim 12, further comprising:

determining whether charging of the resonance power receiver is completed; and

notifying the resonance power transmitter of a completion of the charging of the resonance power receiver, when the charging of the resonance power receiver is completed.

14. A resonance power transmitter comprising:

a resonance power generator configured to generate the resonance power, wherein resonance frequencies of the resonance power vary for a plurality of time intervals; and

a source resonator configured to transmit the resonance power to a resonance power receiver;

a communication unit configured to receive, from the resonance power receiver, information regarding the resonance frequency having the highest power transmission efficiency among the resonance frequencies used in the time intervals.

15. The resonance power transmitter of claim 14, further comprising:

a detector configured to detect the resonance power receiver.

16. The resonance power transmitter of claim 14, wherein:

the resonance power generator is configured to generate the resonance power using the resonance frequency having the highest power transmission efficiency, and

the source resonator is configured to transmit the generated resonance power to the resonance power receiver.

17. The resonance power transmitter of claim 14, wherein one or more of the resonance frequencies used in the time intervals are determined by scanning a frequency characteristic of a reflected wave, are determined based on a channel of a predetermined width, or are randomly determined in a predetermined bandwidth.

18. A resonance power receiver comprising:

a target resonator configured to receive resonance power from a resonance power transmitter, the resonance power having resonance frequencies which vary for a plurality of time intervals;

a communication unit configured to receive information regarding the resonance frequencies used in the time intervals; and

a target controller configured to detect a resonance frequency having the highest power transmission efficiency among the resonance frequencies used in the time intervals,

wherein the communication unit is configured to transmit the detected resonance frequency to the resonance power transmitter.

19. The resonance power receiver of claim 18, wherein the target resonator is configured to receive, from the resonance power transmitter, resonance power generated using the detected resonance frequency.

20. The resonance power receiver of claim 18, wherein, when charging of the resonance power receiver is completed, the target controller is configured to notify the resonance power transmitter of a completion of the charging of the resonance power receiver.