Direct feeding apparatus for impedance matching of wireless power transmission device, and transmitter and receiver using the same

• US 9,041,253 B2
• Filed: 11/25/2011
• Issued: 05/26/2015
• Est. Priority Date: 11/26/2010
• Status: Expired due to Fees

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Yun, Je-Hoon, Cho, In-Kui, Moon, Jung-Ick, Kim, Seong-Min, Park, Dong-Hee
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Dhillon, Jagdeep
• Application Number:
  US13/304,550
• Publication Number:
  US 20120133214A1
• Time in Patent Office: 1,278 Days
• Field of Search: 307/104, 307/66, 307/80, 307/82, 307/29, 320/108, 320/109, 463/37, 463/43, 463/39, 343/702, 343/893
• US Class Current: 307/104
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H03H 3/00 Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
• CPC Class Codes: H03H 7/40 Automatic matching of load impedance to source impedance

Abstract

A direct feeding apparatus for impedance matching of a wireless power transmission device includes a helical type resonator, and a feeding unit configured to directly feed power to a region having a relatively small current value as compared to a center of a conductive line of the resonator.

Claims

1. A direct feeding apparatus for impedance matching of a wireless power transmission device, comprising:

a helical type resonator formed of a conductive line; and

a feeding unit formed on the helical type resonator, the feeding unit being configured to directly feed power to an outside region of the helical type resonator having a relatively small current value as compared to a center of the conductive line of the resonator without the impedance matching,

wherein, when the power by the direct feeding apparatus is directly fed to a transmitting device, the transmitting device provides the power to a receiving device in a resonance type wireless power transmission scheme, without the impedance matching.

2. The direct feeding apparatus of claim 1, wherein the resonator comprises a two-dimensional rectangular helical type resonator.

3. The direct feeding apparatus of claim 1, wherein the resonator comprises a two-dimensional circular helical type resonator.

4. The direct feeding apparatus of claim 1, wherein the outside region is a region which does not include the center, when the conductive line of the resonator is equally divided by four.

5. A symmetric resonance type transmitter/receiver, wherein both of the transmitting device and the receiving device are configured with the direct feeding apparatus of claim 1, and the transmitting device and the receiving device are spaced apart from each other by a predetermined distance.

6. The symmetric resonance type transmitter/receiver of claim 5, wherein a feeding point is installed to be closer to an end point of the conductive line of the resonator as the distance between the transmitting device and the receiving device is larger than a threshold value, and the feeding point is installed to be farther from the end point of the conductive line of the resonator as the distance therebetween is smaller than the threshold value.

7. The symmetric resonance type transmitter/receiver of claim 5, wherein a resonator type receiving device is installed in a wall mount TV, and a resonator type transmitting device is installed on a wall.

8. An asymmetric resonance type transmitter/receiver, wherein

one of the transmitting device and the receiving device is configured with the direct feeding apparatus of claim 1,

the other is configured with a non-resonator including a direct feeding unit, and

the transmitting device and the receiving device are spaced apart from each other by a predetermined distance.

9. The asymmetric resonance type transmitter/receiver of claim 8, wherein a feeding point is installed to be closer to an end point of the conductive line of the resonator as the distance between the transmitting device and the receiving device is larger than a threshold value, and the feeding point is installed to be farther from the end point of the conductive line of the resonator as the distance therebetween is smaller than the threshold value.

10. The asymmetric resonance type transmitter/receiver of claim 8, wherein the number of turns of a loop device being the non-resonator is increased as the predetermined distance is increased.

11. The asymmetric resonance type transmitter/receiver of claim 8, wherein the receiving device is provided in plurality, and the plurality of receiving devices are configured with a non-resonator.

12. The asymmetric resonance type transmitter/receiver of claim 8, wherein a non-resonator or resonator type receiving device is installed in a main body of a flash memory, and a separable cover is made of a nonconductor.

13. The asymmetric resonance type transmitter/receiver of claim 8, wherein a non-resonator type receiving device is installed in a flash memory, and a resonator type transmitting device is installed in a computer main body.

14. The asymmetric resonance type transmitter/receiver of claim 8, wherein a non-resonator type receiving device is installed in a flash memory, and a resonator type transmitting device is installed in a computer monitor.

15. The asymmetric resonance type transmitter/receiver of claim 8, wherein a resonator type receiving device is installed in a mobile phone, and a non-resonator type transmitting device is installed in a computer monitor.

16. The asymmetric resonance type transmitter/receiver of claim 8, wherein a non-resonator type receiving device is installed in a mobile phone, and a resonator type transmitting device is installed in a computer main body.

17. The asymmetric resonance type transmitter/receiver of claim 8, wherein a resonator type receiving device is installed in a wall mount TV, and a non-resonator type transmitting device is installed on a wall.