Wireless power transmission apparatus and energy charging apparatus

• US 9,853,456 B2
• Filed: 07/10/2014
• Issued: 12/26/2017
• Est. Priority Date: 12/24/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kwon, Ui Kun, Kim, Sang Joon, Yoon, Seung Keun
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Yeshaw, Esayas
• Application Number:
  US14/328,432
• Publication Number:
  US 20150180240A1
• Time in Patent Office: 1,265 Days
• Field of Search: 307104
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless power transmission apparatus includes a resonator configured to transmit power through a resonance with another resonator, a switch configured to connect the resonator to a power source, a setting unit configured to set a target amount of current to flow in the resonator, and a control unit configured to control the switch based on the target amount of current.

Claims

1. A wireless power transmission apparatus comprising:

a resonator configured to transmit power through a resonance with another resonator;

a switch configured to connect the resonator to a power source;

a setting unit configured to dynamically set a target amount of current to flow in the resonator based on at least one of data to be transmitted to the another resonator, an actual amount of current flowing in the resonator and a resonance waveform of the resonator; and

a control unit configured to control the switch based on the target amount of current.

2. The apparatus of claim 1, further comprising:

a sensor configured to sense the actual amount of current flowing in the resonator, wherein the control unit is configured to control the switch by comparing the actual amount of current flowing in the resonator to the target amount of current set by the setting unit.

3. The apparatus of claim 1, wherein, to perform the dynamic setting, the setting unit is configured to:

set the target amount of current based on the data to be transmitted to the other resonator.

4. The apparatus of claim 1, wherein, to perform the dynamic setting, the setting unit is configured to:

set the target amount of current based on a charging and discharging cycle of the resonator.

5. The apparatus of claim 1, wherein,

to perform the dynamic setting, the setting unit is configured to set a first target amount of current corresponding to first data in a first symbol duration, and set a second target amount of current corresponding to second data in a second symbol duration,

the first symbol duration corresponds to a first charging and discharging cycle of the resonator, and

the second symbol duration corresponds to a second charging and discharging cycle of the resonator.

6. The apparatus of claim 1, wherein, to perform the dynamic setting, the setting unit is further configured to:

analyze any one or any combination of whether the other resonator is present, a power reception state of the other resonator, and an amount of residual energy of the resonator, based on the actual amount of current flowing in the resonator.

7. The apparatus of claim 1, wherein, to perform the dynamic setting, the setting unit is further configured to:

analyze a feedback received from the other resonator based on the resonance waveform of the resonator.

8. The apparatus of claim 1, wherein, to perform the dynamic setting, the setting unit is configured to:

set the target amount of current based on at least two of the resonance waveform of the resonator, the actual amount of current flowing in the resonator, and the data to be transmitted to the other resonator.

9. The apparatus of claim 1, wherein, to perform the dynamic setting, the setting unit is configured to:

select one of predetermined candidate target amounts of current as the target amount of current.

10. An energy charging apparatus comprising:

an inductor configured to store energy;

a switch configured to connect the inductor to a power source;

a setting unit configured to dynamically set a target amount of energy to be stored in the inductor based on at least one of data to be transmitted to the resonator, an actual amount of current flowing in the resonator and a resonance waveform of the resonator; and

a control unit configured to control the switch based on the target amount of energy.

11. The apparatus of claim 10, further comprising:

a sensor configured to sense the actual amount of current flowing in the inductor, wherein the control unit is configured to control the switch by comparing the actual amount of current flowing in the inductor to a target amount of current set by the setting unit to flow in a resonator that corresponds to the target amount of energy.

12. The apparatus of claim 10, wherein the inductor is included in a resonator configured to transmit power through a resonance with another resonator.

13. The apparatus of claim 10, wherein, to perform the dynamic setting, the setting unit is configured to:

set the target amount of energy based on the data to be transmitted through the inductor.

14. The apparatus of claim 10, wherein, to perform the dynamic setting, the setting unit is configured to:

set the target amount of energy based on the actual amount of current flowing in the inductor.

15. The apparatus of claim 10, wherein, to perform the dynamic setting, the setting unit is configured to:

set the target amount of energy based on a waveform of a voltage applied between both ends of the inductor.

16. The apparatus of claim 10, wherein, to perform the dynamic setting, the setting unit is configured to:

set the target amount of energy based on at least two of a waveform of a voltage applied between both ends of the inductor, the actual amount of current flowing in the inductor, and the data to be transmitted through the inductor.

17. A method of controlling a wireless power transmission apparatus comprising a resonator configured to transmit power through a resonance with another resonator, the method comprising:

dynamically setting a target amount of current into flow into the resonator based on any one or any combination of a resonance waveform of the resonator, an actual amount of current flowing in the resonator, and data to be transmitted to the other resonator; and

determining whether current is allowed to flow in the resonator based on a charging and discharging cycle of the resonator.

18. A non-transitory computer-readable storage medium storing a program comprising instructions to cause a computer to perform the method of claim 17.

19. An apparatus comprising:

a resonator configured to transmit power to another resonator; and

a setting unit configured to dynamically set a target amount of current to flow in the resonator based on any one or any combination of data to be transmitted to the other resonator, an actual amount of current flowing in the resonator, and a resonance waveform of the resonator.

20. The apparatus of claim 19, further comprising:

a switch configured to connect the resonator to a power source; and

a control unit configured to control the switch based on the target amount of current.

21. The apparatus of claim 19, further comprising:

a data generator configured to generate the data to be transmitted to the other resonator.

22. The apparatus of claim 19, further comprising:

a sensor connected in series to the resonator, and configured to sense the actual amount of current flowing in the resonator.

23. The apparatus of claim 19, further comprising:

a sensor configured to sense the resonance waveform of the resonator.

24. The apparatus of claim 19, further comprising:

a sensor connected in parallel to the resonator, and configured to sense the actual amount of current flowing in the resonator.