Reflected energy management apparatus and method for resonance power transmission

• US 8,957,630 B2
• Filed: 12/14/2010
• Issued: 02/17/2015
• Est. Priority Date: 12/29/2009
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Hong, Young Tack, Kim, Nam Yun, Kwon, Sang Wook, Park, Eun Seok, Ryu, Young Ho
• Primary Examiner(s): Dunn, Drew A
• Assistant Examiner(s): PELTON, NATHANIEL R
• Application Number:
  US12/968,005
• Publication Number:
  US 20110156635A1
• Time in Patent Office: 1,526 Days
• Field of Search: 320/104, 320/107, 320/108
• US Class Current: 320/108
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type

Abstract

Provided is a reflected energy management apparatus for resonance power transmission. The reflected energy management apparatus for resonance power transmission may include a source resonator configured to transmit a power to a target resonator, and a reflected power management unit configured to: detect a reflected wave corresponding to the power transmitted to the target resonator, and to generate a power using the detected reflected wave.

Claims

1. A reflected energy management apparatus for resonance power transmission, the reflected energy management apparatus comprising:

a source resonator configured to transmit a transmission power to a target resonator; and

a reflected power management unit configured to;

detect a reflected wave in response to the transmission power being transmitted to the target resonator; and

generate a reflected power using the detected reflected wave, wherein the reflected power is used as a DC voltage, and

wherein a power transfer efficiency is determined based on a ratio between a square of the transmission power and a square of the reflected power and further based on a level of impedance matching in a resonance frequency.

2. The reflected energy management apparatus of claim 1, wherein the reflected power management unit comprises:

a coupler configured to detect the reflected wave by electrical coupling;

a rectifier configured to generate a direct current (DC) power by rectifying the reflected wave detected by the coupler; and

a charging unit configured to store the DC power.

3. The reflected energy management apparatus of claim 1, wherein the reflected power management unit comprises:

a coupler configured to detect the reflected wave by electrical coupling;

a rectifier configured to generate a DC voltage by rectifying the reflected wave detected by the coupler; and

a DC-to-DC (DC/DC) converter configured to provide the DC voltage as an auxiliary power of a resonance power transmission apparatus.

4. The reflected energy management apparatus of claim 1, further comprising:

a circulator configured to;

provide the source resonator with a power input from a resonance power transmission apparatus; and

provide the reflected power management unit with the reflected wave.

11. The reflected energy management apparatus of claim 1, wherein the reflected power management unit is configured to detect the reflected wave by a Voltage Standing Wave Ratio (VSWR) of the source resonator.

12. The reflected energy management apparatus of claim 1, further comprising:

a circulator comprising a first terminal and a second terminal, wherein

the first terminal is connected to one of an AC/DC converter, a frequency generator, a power amplifier, and a coupler, and

the second terminal is connected to the source resonator.

13. The reflected energy management apparatus of claim 1, wherein at least one of a source resonator and a target resonator is an epsilon negative, mu negative, a double negative, a negative refractive index, or a left-handed, material.

14. The reflected energy management apparatus of claim 1, wherein at least one of a source resonator and a target resonator further comprises a matcher configured to adjust the impedance of the source resonator and/or target resonator in response to the detected reflected wave.

15. The reflected energy management apparatus of claim 14, wherein the matcher is configured to adjust the impedance of the source resonator and/or target resonator by detecting a resonance point.

16. The reflected energy management apparatus of claim 14, wherein the matcher is configured to adjust the impedance of the source resonator and/or target resonator by changing the physical shape of the matcher.

5. A reflected energy management apparatus for resonance power transmission, the reflected energy management apparatus comprising:

a coupler configured to detect a reflected wave in response to a transmission power being transmitted to a target resonator by electrical coupling, the reflected wave being generated in a resonance power transmission system;

a rectifier configured to generate a DC power by rectifying the reflected wave detected by the coupler; and

a charging unit configured to store the DC power,

wherein the reflected energy management apparatus generates a reflected power using the reflected wave,

wherein a power transfer efficiency is determined based on a ratio between a square of the transmission power and a square of the reflected power and further based on a level of impedance matching in a resonance frequency.

17. The reflected energy management apparatus of claim 5, wherein the reflected energy management apparatus is configured to detect the reflected wave by a Voltage Standing Wave Ratio (VSWR) of the source resonator.

6. A reflected energy management method for resonance power transmission, the method comprising:

transmitting, by a source resonator, a transmission power to a target resonator; and

detecting, by a reflected power management unit, a reflected wave in response to the transmission power being transmitted to the target resonator; and

generating, by the reflected power management unit, a reflected power using the detected reflected wave, wherein the reflected power is used as a DC voltage, and

wherein a power transfer efficiency is determined based on a ration between a square of the transmission power and a square of the reflected power and further based on a level of impedance matching in a resonance frequency.

7. The method of claim 6, further comprising:

detecting the reflected wave by electrical coupling;

generating a direct current (DC) power by rectifying the detected reflected wave; and

storing the DC power.

8. The method of claim 6, further comprising:

detecting the reflected wave by electrical coupling;

generating a DC voltage by rectifying the detected reflected wave; and

providing the DC voltage as an auxiliary power of a resonance power transmission apparatus.

9. The method of claim 6, further comprising:

providing the source resonator with a power input from a resonance power transmission apparatus; and

providing the reflected power management unit with the reflected wave.

18. The method of claim 6, further comprising adjusting the impedance of the source resonator and/or target resonator in response to the detected reflected wave.

19. The method of claim 6, further comprising adjusting the impedance of the source resonator and/or target resonator in response to the detected reflected wave based on a control signal.

20. The method of claim 18, wherein the adjusting comprises detecting a resonance point.

10. A reflected energy management method for resonance power transmission, the method comprising:

detecting, by a coupler, a reflected wave in response to a transmission power being transmitted to a target resonator by electrical coupling, the reflected wave being generated in a resonance power transmission system;

generating, by a rectifier, a DC power by rectifying the reflected wave detected by the coupler; and

storing, by a charging unit, the DC power,

wherein a reflected power is generated using the reflected wave, and

a power transfer efficiency is determined based on a ratio between a square of the transmission power and a square of the reflected power and further based on a level of impedance matching in a resonance frequency.