WIRELESS POWER TRANSMISSION SYSTEM WITH ENHANCED MAGNETIC FIELD STRENGTH

• US 20130134791A1
• Filed: 09/14/2012
• Published: 05/30/2013
• Est. Priority Date: 11/29/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: PARK, Eun Seok, KIM, Ki Young, KWON, Sang Wook, KIM, Nam Yun, KIM, Dong Zo, PARK, Yun Kwon, YOON, Chang Wook, CHOI, Jin Sung, HONG, Young Tack, RYU, Young Ho
• Granted Patent: US 9,418,785 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 5/00 Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence

Abstract

A wireless power transmission system with an enhanced magnetic field strength is provided. A wireless power transmitter includes a generator configured to generate a power. The wireless power transmitter further includes a resonator configured to generate a magnetic field to transmit the power to a target device. The wireless power transmitter further includes a slab unit configured to enhance the magnetic field.

Claims

1. A wireless power transmitter comprising:

a generator configured to generate a power;

a resonator configured to generate a magnetic field to transmit the power to a target device; and

a slab unit configured to enhance the magnetic field.

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

the slab unit comprises a metamaterial; and

a permittivity of the metamaterial and/or a permeability of the metamaterial comprises a negative value.

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

the slab unit comprises a metamaterial; and

a relative permittivity of the metamaterial and a relative permeability of the metamaterial are identical to each other.

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

the slab unit comprises a metamaterial;

a relative permeability of the metamaterial is greater than a value of 1; and

a magnitude of a relative permittivity of the metamaterial and a magnitude of the relative permeability are identical to each other.

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

the slab unit comprises a metamaterial; and

a difference between a relative permittivity of the metamaterial and a relative permeability of the metamaterial is less than 20%.

6. The wireless power transmitter of claim 1, wherein the slab unit comprises:

a metamaterial comprising

an electric dipole structure configured to determine a relative permittivity of the metamaterial, and

a magnetic dipole structure configured to determine a relative permeability of the metamaterial.

7. The wireless power transmitter of claim 6, wherein:

the electric dipole structure and the magnetic dipole structure are arranged in the slab unit in a form of an array.

8. The wireless power transmitter of claim 6, wherein:

the magnetic dipole structure comprises a loop-shaped conductor configured to generate a capacitance associated with a resonance characteristic.

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

an area the slab unit is greater than or equal to an area of the resonator.

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

the resonator and the slab unit are configured into a single package.

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

the slab unit comprises a metamaterial; and

an impedance of the metamaterial and an impedance of air are identical to each other.

12. An apparatus configured to enhance a magnetic field strength in a wireless power transmission system, the apparatus comprising:

an electric dipole structure configured to determine a relative permittivity of the apparatus; and

a magnetic dipole structure configured to determine a relative permeability of the apparatus,

wherein the apparatus is configured to enhance a magnetic field between a source device and a target device.

13. The apparatus of claim 12, wherein:

the electric dipole structure comprises a wire; and

the relative permittivity of the apparatus comprises a negative value.

14. The apparatus of claim 12, wherein:

the magnetic dipole structure comprises a split-ring resonator; and

the relative permeability of the apparatus comprises a negative value.

15. A wireless power receiver comprising:

a resonator configured to receive a power using a magnetic field formed between a source device and the resonator;

a power supply device configured to supply the received power to a load; and

a slab unit configured to enhance the magnetic field.

16. The wireless power receiver of claim 15, wherein:

the slab unit comprises a metamaterial; and

a permittivity of the metamaterial and/or a permeability of the metamaterial comprises a negative value.

17. The wireless power receiver of claim 15, wherein:

the slab unit comprises a metamaterial; and

a relative permittivity of the metamaterial and a relative permeability of the metamaterial are identical to each other.

18. The wireless power receiver of claim 15, wherein:

the slab unit comprises a metamaterial;

a relative permeability of the metamaterial is greater than a value of 1; and

a magnitude of a relative permittivity of the metamaterial and a magnitude of the relative permeability are identical to teach other.

19. The wireless power receiver of claim 15, wherein:

the slab unit comprises a metamaterial; and

a difference between a relative permittivity of the metamaterial and a relative permeability of the metamaterial is less than 20%.

20. The wireless power receiver of claim 15, wherein the slab unit comprises:

a metamaterial comprising

an electric dipole structure configured to determine a relative permittivity of the metamaterial, and

a magnetic dipole structure configured to determine a relative permeability of the metamaterial.

21. The wireless power receiver of claim 20, wherein:

the electric dipole structure and the magnetic dipole structure are arranged in the slab unit in a form of an array.

22. The wireless power receiver of claim 20, wherein:

the magnetic dipole structure comprises a loop-shaped conductor configured to generate a capacitance associated with a resonance characteristic.

23. The wireless power receiver of claim 15, wherein:

an area of the slab unit is greater than or equal to an area of the resonator.

24. The wireless power receiver of claim 15, wherein:

the resonator and the slab unit are configured into a single package.

25. The wireless power receiver of claim 15, wherein:

the slab unit comprises a metamaterial; and

an impedance of the metamaterial and an impedance of air are identical to each other.