Wireless power transmission system with enhanced magnetic field strength

Patent metadata

Field	Value
Publication number	US-9418785-B2
Application number	US-201213616347-A
Country	US
Kind code	B2
Filing date	Sep 14, 2012
Priority date	Nov 29, 2011
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

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.

First claim

What is claimed is:

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
wherein the slab unit comprises
a metamaterial comprising an electric dipole structure and a magnetic dipole structure,
wherein a relative permittivity at the metamaterial is determined based on the electric dipole structure and a relative permeability of the metamaterial is determined based on the magnetic dipole structure,
wherein the magnetic dipole structure comprises a loop-shaped conductor configured to generate a capacitance associated with a resonance characteristic and wherein the capacitance is determined to have a zeroth order resonance for the resonator at a target frequency of transmitting the power.

2. The wireless power transmitter of claim 1 , wherein:
the slab unit comprises a metamaterial; and
at least one of a permittivity and 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 electric dipole structure and the magnetic dipole structure are arranged in the slab unit in a form of an array.

7. The wireless power transmitter of claim 1 , wherein:
an area the slab unit is greater than or equal to an area of the resonator.

8. The wireless power transmitter of claim 1 , wherein:
the resonator and the slab unit are configured into a single package.

9. 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.

Assignees

• Park Eun Seok
• Kim Ki Young
• Ryu Young Ho
• Kwon Sang Wook
• Kim Nam Yun
• Kim Dong Zo
• Park Yun Kwon
• Yoon Chang Wook
• Choi Jin Sung
• Hong Young Tack
• Samsung Electronics Co Ltd

Inventors

• Park Eun Seok
• Kim Ki Young
• Ryu Young Ho
• Kwon Sang Wook
• Kim Nam Yun
• Kim Dong Zo
• Park Yun Kwon
• Yoon Chang Wook
• Choi Jin Sung
• Hong Young Tack

Classifications

• H02J4/25

  for transfer of electric power between AC and DC networks, e.g. for supplying the DC section within a load from an AC mains system · CPC title

• H01F38/14 Primary

  Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title

• H02J5/00

  Electricity · mapped topic

• H02J50/005

  Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices · CPC title

• H02J50/90 Primary

  involving detection or optimisation of position, e.g. alignment · CPC title