COMMUNICATION SYSTEM USING WIRELESS POWER

• US 20130049483A1
• Filed: 08/23/2012
• Published: 02/28/2013
• Est. Priority Date: 08/24/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Sang Joon, KWON, Ui Kun
• Granted Patent: US 9,627,914 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/12 of the resonant type

Abstract

Provided is an apparatus and method for wirelessly transmitting power. According to one general aspect, a communication device using wireless power may include: a transmitter configured to transmit, to a target resonator, energy stored in a source resonator through mutual resonance; an energy compensator configured to compensate for energy expended in the source resonator; and a controller configured to control an electrical connection providing energy to the source resonator.

Claims

1. A communication device using wireless power, the communication device comprising:

a transmitter configured to transmit, to a target resonator, energy stored in a source resonator through mutual resonance;

an energy compensator configured to compensate for energy expended in the source resonator; and

a controller configured to control an electrical connection providing energy to the source resonator.

2. The communication device of claim 1, further comprising:

a modulator configured to modulate information using mutual resonance between the source resonator and the target resonator.

3. The communication device of claim 1, wherein the energy compensator compensates for energy expended due to an internal resistance, a radiation resistance, or both, of the source resonator in the energy stored in the source resonator.

4. The communication device of claim 1, wherein the energy compensator comprises:

a detector configured to detect energy expended in the source resonator; and

a compensator configured to compensate for the detected energy.

5. The communication device of claim 1, wherein the energy compensator compensates for the expended energy using an active element so that a quality (Q) factor of the source resonator has a value greater than or equal to a predetermined value.

6. The communication device of claim 2, wherein the modulator modulates the information depending on whether generating mutual resonance between the source resonator and the target resonator is performed.

7. The communication device of claim 2, wherein the modulator modulates the information by quantizing a level of the energy stored in the source resonator.

8. The communication device of claim 1, wherein the controller determines whether to generate mutual resonance between the source resonator and the target resonator by controlling the electrical connection between the source resonator and a power feeding unit.

9. The communication device of claim 1, wherein the controller controls an electrical connection between the power feeding unit and the energy compensator so that energy is provided to the energy compensator from a power feeding unit.

10. The communication device of claim 1, further comprising:

a receiver configured to receive energy transmitted from the target resonator through mutual resonance between the source resonator and the target resonator; and

a demodulator configured to determine whether mutual resonance occurs by detecting a waveform of the received energy, and to demodulate information transmitted by the target resonator based on whether mutual resonance occurs.

11. A communication device using wireless power, the communication device comprising:

a transmitter configured to transmit, to a source resonator, energy stored in a target resonator through mutual resonance;

an energy compensator configured to compensate for energy expended in the target resonator; and

a controller configured to control an electrical connection between the target resonator and a load provided with energy from the target resonator.

12. The communication device of claim 11, further comprising:

a modulator configured to modulate information using mutual resonance between the source resonator and the target resonator.

13. The communication device of claim 11, further comprising:

a receiver configured to receive energy transmitted from the source resonator through mutual resonance between the target resonator and the source resonator; and

a demodulator configured to determine whether mutual resonance occurs by detecting a waveform of the received energy, and to demodulate information transmitted by the source resonator based on whether mutual resonance occurs.

14. The communication device of claim 11, wherein the energy compensator compensates for energy expended due to an internal resistance, a radiation resistance, or both, of the target resonator in the energy stored in the target resonator.

15. The communication device of claim 11, wherein the energy compensator comprises:

a detector configured to detect energy expended in the target resonator; and

a compensator configured to compensate for the detected energy.

16. The communication device of claim 11, wherein the energy compensator compensates for the energy expended using an active element so that a quality (Q) factor of the target resonator has a value greater than or equal to a predetermined value.

17. The communication device of claim 11, wherein the controller determines whether to generate mutual resonance between the target resonator and the source resonator by changing a resonant frequency of the target resonator.

18. The communication device of claim 11, further comprising:

a driving power unit configured to provide energy used for driving the energy compensator.

19. The communication device of claim 18, wherein the controller comprises:

a monitoring unit configured to monitor a magnitude of energy received in the target resonator;

a capturing unit configured to capture the energy stored in the target resonator when the monitored magnitude of energy has a peak value within a predetermined period; and

a compensator configured to compensate for energy provided by the driving power unit using the captured energy.

20. A communication system wireless power, the communication system comprising:

a first modulator configured to modulate information using mutual resonance between a source resonator and a target resonator;

a first transmitter configured to transmit, to the target resonator, energy stored in the source resonator through mutual resonance;

a first energy compensator configured to compensate for energy expended in the source resonator;

a first controller configured to control an electrical providing energy to the source resonator;

a first receiver configured to receive energy transmitted from the target resonator through mutual resonance between the source resonator and the target resonator;

a first demodulator configured to determine whether mutual resonance occurs by detecting a waveform of the received energy, and to demodulate information transmitted by the source resonator based on whether mutual resonance occurs;

a second energy compensator configured to compensate for energy expended in the target resonator; and

a second controller configured to control an electrical connection between the target resonator and a load provided with energy from the target resonator.

21. The communication system of claim 20, further comprising:

a second modulator configured to modulate information using mutual resonance between the source resonator and the target resonator; and

a second transmitter configured to transmit, to the source resonator, energy stored in the target resonator through mutual resonance.

22. The communication system of claim 21, further comprising:

a second receiver configured to receive energy transmitted from the target resonator through mutual resonance between the source resonator and the target resonator; and

a second demodulator configured to determine whether mutual resonance occurs by detecting a waveform of the received energy, and to demodulate information transmitted by the target resonator based on whether mutual resonance occurs.

23. The communication system of claim 20, wherein the first energy compensator compensates for the energy expended using an active element so that a quality (Q) factor of the source resonator has a value greater than or equal to a predetermined value.

24. The communication system of claim 20, wherein the second energy compensator compensates for the expended energy using an active element so that a Q factor of the target resonator has a value greater than or equal to a predetermined value.

25. A communication method using wireless power, the communication method comprising:

compensating for energy expended in a source resonator;

controlling an electrical connection providing energy to the source resonator; and

transmitting, to a target resonator, energy stored in the source resonator through mutual resonance.

26. The communication method claim 25, wherein the compensating comprises compensating for energy expended due to an internal resistance, a radiation resistance, or both, of the source resonator in the energy stored in the source resonator.

27. The communication method claim 25, further comprising:

modulating information using mutual resonance between the source resonator and the target resonator.

28. A communication method using wireless power, the communication method comprising:

compensating for energy expended in a target resonator;

controlling an electrical connection between the target resonator and a load provided with energy from the target resonator; and

transmitting, to the source resonator, energy stored in the target resonator through mutual resonance.

29. The communication method claim 28, wherein the compensating comprises compensating for energy expended due to an internal resistance and a radiation resistance of the target resonator in the energy stored in the target resonator.

30. The communication method claim 28, further comprising:

modulating information using mutual resonance between the source resonator and the target resonator.