WIRELESS POWER TRANSMITTER AND METHOD THAT TRANSMITS RESONANCE POWER USING MULTIPLE BANDS

• US 20120049647A1
• Filed: 08/26/2011
• Published: 03/01/2012
• Est. Priority Date: 08/26/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Dong Zo, KWON, Sang Wook, PARK, Yun Kwon, HONG, Young Tack, KIM, Nam Yun, CHOI, Jin Sung, PARK, Eun Seok, RYU, Young Ho
• Granted Patent: US 8,987,942 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

A wireless power transmitter that transmits a resonance power via a multi-band resonator and a method thereof are provided. According to an aspect, a wireless power transmitter may include: a source unit configured to generate resonance power; a power amplifying unit configured to amplify the resonance power; and a multi-band resonance unit including at least two resonators, the at least two resonators configured to transmit the amplified resonance power to target resonators using different resonance bands.

Claims

1. A wireless power transmitter comprising:

a source unit configured to generate resonance power;

a power amplifying unit configured to amplify the resonance power; and

a multi-band resonance unit including at least two resonators, the at least two resonators configured to transmit the amplified resonance power to target resonators using different resonance bands.

2. The wireless power transmitter of claim 1, wherein:

the power amplifying unit is configured to amplify the resonance power to a fundamental resonance power of a fundamental band, and to transmit, to the multi-band resonance unit, the fundamental resonance power and a harmonic resonance power, generated during the amplification, that is associated with at least one harmonic band, and

the multi-band resonance unit includes a fundamental resonator that is configured to transmit the fundamental resonance power to a first target resonator, and at least one harmonic resonator that is configured to transmit the harmonic resonance power to a second target resonator.

3. The wireless power transmitter of claim 2, wherein the harmonic resonance power is generated when the resonance power passes through the power amplifying unit that is a non-linear element.

4. The wireless power transmitter of claim 2, wherein the harmonic resonance power has lower power than the fundamental resonance power.

5. The wireless power transmitter of claim 1, wherein the multi-band resonance unit comprises a fundamental resonator configured as a loop that transmits a fundamental resonance power of a fundamental band to a first target resonator, and at least one harmonic resonator configured as a loop that transmits a harmonic resonance power of a harmonic band to a second target resonator.

6. The wireless power transmitter of claim 1, wherein the source unit is configured to receive energy to generate the resonance power.

7. A method of transmitting a multi-band resonance power in a wireless power transmitter, the method comprising:

generating resonance power;

amplifying the resonance power; and

transmitting, to target resonators, the amplified resonance power using different resonance bands.

8. The method of claim 7, wherein:

the amplifying comprises generating a fundamental resonance power of a fundamental band by amplifying the resonance power, and a harmonic resonance power, generated during the amplification, that is associated with least one harmonic band; and

the transmitting comprises transmitting, using a fundamental resonator, the fundamental resonance power to a first target resonator, and transmitting, using a harmonic resonator, the harmonic resonance power to a second target resonator.

9. The method of claim 8, wherein the harmonic resonance power is generated when the resonance power passes through power amplifying unit that is a non-linear element.

10. The method of claim 8, wherein the harmonic resonance power has lower power than the fundamental resonance power.

11. The method of claim 7, further comprising:

receiving energy to generate the resonance power.

12. A wireless power transmitter comprising:

a plurality of resonators configured to transmit resonance power to a plurality of target resonators using different resonance bands.

13. The wireless power transmitter of claim 12, further comprising

an amplifier configured to amplify the resonance power.

14. The wireless power transmitter of claim 12, wherein the amplifier is configured to generate fundamental resonance power and harmonic resonance power.

15. The wireless power transmitter of claim 14, wherein the harmonic resonance power has lower power than the fundamental resonance power.

16. The wireless power transmitter of claim 12, wherein the plurality of resonators comprise a fundamental resonator that is configured to transmit fundamental resonance power to a first target resonator, and a harmonic resonator that is configured to transmit harmonic resonance power to a second target resonator.