Wireless power transmission apparatus

• US 9,293,950 B2
• Filed: 12/20/2012
• Issued: 03/22/2016
• Est. Priority Date: 02/29/2012
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Cho, In Kui, Yun, Je Hoon, Kim, Seong-Min, Moon, Jung Ick
• Primary Examiner(s): Bauer, Scott
• Application Number:
  US13/721,824
• Publication Number:
  US 20130221757A1
• Time in Patent Office: 1,188 Days
• Field of Search: 307/104
• US Class Current: 1/1
• CPC Class Codes: B60L 2200/12 Bikes
• CPC Class Codes: B60L 50/20 using propulsion power generated by humans or animals
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/31 Charging columns specially adapted for electric vehicles
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/50 using additional energy repeaters between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A wireless power transmission apparatus includes: a transmission resonator installed in one side wall within a specific space and configured to comprise a transmission feeding loop for transmitting impedance matching and power and receive and transmit the impedance matching and power using the transmission feeding loop. Further, the wireless power transmission apparatus includes a relay resonator installed in another side wall within the specific space and configured to have a resonant frequency identical with that of the transmission resonator and store energy in the specific space by generating mutual resonance through a resonance characteristic with the transmission resonator; and one or more reception resonators installed within the specific space and configured to have a resonant frequency identical with that of the transmission resonator and receive the energy stored in the specific space.

Claims

1. A wireless power transmission apparatus, comprising:

a transmission resonator installed in one side wall within a specific space, a transmission feeding loop installed in the one sidewall adjacent to the transmission resonator and configured to perform an impedance matching for the transmission resonator and transmit and receive power between the transmission resonator, wherein the transmission resonator is configured to receive and transmit power using the transmission feeding loop;

a relay resonator installed in another side wall within the specific space and configured to have a resonant frequency identical with that of the transmission resonator and store energy in the specific space by generating mutual resonance through a resonance characteristic with the transmission resonator; and

one or more reception resonators installed within the specific space and configured to have a resonant frequency identical with that of the transmission resonator and receive the energy stored in the specific space, wherein none of the one or more reception resonators have a feeding loop.

2. The wireless power transmission apparatus of claim 1, wherein the reception resonator has a structure of a direct feeding method.

3. The wireless power transmission apparatus of claim 1, wherein the resonant frequency ranges from 1.7 MHz to 1.8 MHz.

4. The wireless power transmission apparatus of claim 1, wherein the reception resonators are attached to a robot or a moving body within the specific space.

5. The wireless power transmission apparatus of claim 1, wherein the transmission resonator and the transmission feeding loop are sealed by a shielding body or a shielding sheet for shielding an electromagnetic magnetic field generated from the transmission resonator and the transmission feeding loop.

6. The wireless power transmission apparatus of claim 1, wherein the relay resonator is sealed by a shielding body or a shielding sheet for shielding an electromagnetic field generated from the relay resonator.

7. The apparatus of claim 1, wherein each of the reception resonators has a diameter ranging from 50 mm to 70 mm.

8. The wireless power transmission apparatus of claim 1, wherein the relay resonator is installed in another side wall without a feeding loop.

9. A wireless power transmission apparatus for wirelessly transmitting power to a moving body provided with a wheel, comprising:

a transmission resonator installed in a first fixture for fixing one part of the wheel and a transmission feeding loop installed in the first fixture adjacent to the transmission resonator and configured to perform an impedance matching and transmit and receive power between the transmission resonator, wherein the transmission resonator is configured to receive and transmit power using the transmission feeding loop;

a relay resonator installed in a second fixture for fixing another part of the wheel and configured to have a resonant frequency identical with a resonant frequency of the transmission resonator and store energy in a space between the first and the second fixtures by generating mutual resonance through a resonance characteristic with the transmission resonator; and

one or more reception resonators installed within the specific space and configured to have a resonant frequency identical with a resonant frequency of the transmission resonator and receive the energy stored in the space between the first and the second fixtures, wherein none of the one or more reception resonators have a feeding loop.

10. The apparatus of claim 9, wherein the reception resonator has a structure of a direct feeding method.

11. The apparatus of claim 9, wherein the resonant frequency ranges from 1.7 MHz to 1.8 MHz.

12. The apparatus of claim 9, wherein each of the reception resonators has a diameter ranging from 50 mm to 70 mm.

13. The wireless power transmission apparatus of claim 9, wherein the relay resonator is installed in another side wall without a feeding loop.