COAXIAL RESONANCE COIL HAVING TOROIDAL SHAPE FOR WIRELESS POWER TRANSMISSION

• US 20170155195A1
• Filed: 11/30/2016
• Published: 06/01/2017
• Est. Priority Date: 11/30/2015
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: YUN, Je Hoon, KIM, Seong Min, MOON, Jung Ick, AHN, Duk Ju, JEON, Soon Ik, CHO, In Kui
• Granted Patent: US 10,476,159 B2
• Time in Patent Office: Days
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A coaxial resonance coil having a toroidal shape for wireless power transmission is provided. The coaxial resonance coil may include a central conductive wire used as a power feeding loop for indirectly feeding power to a resonance coil, and an outer conductive wire used as a resonance coil which is wound a plurality of turns in a toroidal shape around the central conductive wire as an axis.

Claims

1. A coaxial resonance coil having a toroidal shape for wireless power transmission, comprising:

a central conductive wire used as a power feeding loop which indirectly feeds power to a resonance coil; and

an outer conductive wire used as a resonance coil which is wound a plurality of turns in a toroidal shape around the central conductive wire as an axis.

2. The coaxial resonance coil of claim 1, wherein the central conductive wire is formed to have a circular shape, a rectangular shape, or a solenoid shape

3. The coaxial resonance coil of claim 1, wherein an outer cover having a non-conductive material is formed on each of the central conductive wire and the outer conductive wire.

4. The coaxial resonance coil of claim 1, wherein the central conductive wire and the outer conductive wire are configured to be arranged inside one outer cover having a non-conductive material in a form of a coaxial resonance cable.

5. The coaxial resonance coil of claim 1, wherein the outer conductive wire is at least one resonance coil which is manufactured as an open type.

6. The coaxial resonance coil of claim 1, wherein the outer conductive wire is at least one resonance coil which is manufactured as a closed type

7. The coaxial resonance coil of claim 6, wherein a capacitor is connected to the at least one resonance coil.

8. The coaxial resonance coil of claim 7, wherein the capacitor is a variable capacitor.

9. The coaxial resonance coil of claim 7, wherein the capacitor is integrated with an adaptor.

10. The coaxial resonance coil of claim 3, wherein a distance between the central conductive wire and the outer conductive wire is adjusted by adjusting a thickness of the outer cover of the central conductive wire.

11. The coaxial resonance coil of claim 1, wherein the resonance coil is arranged in a plurality of layers with respect to the central conductive wire as an axis.

12. The coaxial resonance coil of claim 1, wherein the resonance coil is implemented in a prefabricated type using a connection device.