Wireless power transmitting device and wireless power receiving device

Patent metadata

Field	Value
Publication number	US-11677272-B2
Application number	US-202117509277-A
Country	US
Kind code	B2
Filing date	Oct 25, 2021
Priority date	Oct 27, 2020
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

A wireless power transmitting device includes: an upper coil including a first tubular spiral coil and a first planar spiral coil disposed beneath the first tubular spiral coil; a lower coil including a second planar spiral coil disposed to face the first planar spiral coil and a second tubular spiral coil disposed beneath the second planar spiral coil; a connecting stub configured to connect the upper coil and the lower coil to each other; and a power source configured to supply a power to the upper coil or the lower coil. The first planar spiral coil and the second planar spiral coil generate an electric field and a magnetic field in a resonance state to transfer at least some of the power from the power source to an external wireless power receiving device through the electric field and the magnetic field.

First claim

What is claimed is:

1. An antenna device for transmitting power by wireless power transfer, comprising:
an upper coil comprising a first tubular spiral coil and a first planar spiral coil disposed beneath the first tubular spiral coil;
a lower coil comprising a second planar spiral coil disposed to face the first planar spiral coil and a second tubular spiral coil disposed beneath the second planar spiral coil;
a connecting stub configured to connect the upper coil and the lower coil to each other; and
a power source configured to supply a power to the upper coil or the lower coil,
wherein the first planar spiral coil and the second planar spiral coil generate an electric field and a magnetic field in a resonance state to transfer at least some of the power from the power source to an external wireless power receiving device through the electric field and the magnetic field.

2. The antenna device of claim 1 , further comprising:
a capacitor connected between the upper coil and the lower coil in an electrical parallel with the connecting hub.

3. The antenna device of claim 1 ,
wherein the upper coil further comprises a third planar spiral coil disposed on the first tubular spiral coil,
wherein the lower coil further comprises a fourth planar spiral coil disposed beneath the second tubular spiral coil.

4. The antenna device of claim 1 , wherein each of the first and second tubular spiral coils comprises:
a plurality of turns of wire having a shape wound along an outer circumferential surface of one selected from a three-dimensional object group consisting of a rectangular parallelepiped, a polygon column, a cylinder, an elliptic cylinder.

5. The antenna device of claim 4 , wherein each of the first and second planar spiral coils comprises:
a spirally wound conductor having a shape of a rectangular, polygonal, circular, or oval disk.

6. The antenna device of claim 1 , further comprising:
a power feeding loop disposed to be parallel with the upper coil and the lower coil and spaced apart from the upper coil and the lower coil,
wherein the power source supplies the power to the upper coil or the lower coil through the power feeding loop.

7. The antenna device of claim 6 , wherein the power supply loop receives an electrical energy from the power source and generates an electromagnetic field to indirectly supply the power to the upper coil or the lower coil.

8. The antenna device of claim 1 , wherein a length of the connecting stub is adjustable to allow a change of a resonance frequency of the wireless power transmitting device.

9. An antenna device for receiving power by wireless power transfer, comprising:
an upper coil comprising a first tubular spiral coil and a first planar spiral coil disposed beneath the first tubular spiral coil;
a lower coil comprising a second planar spiral coil disposed to face the first planar spiral coil and a second tubular spiral coil disposed beneath the second planar spiral coil;
a connecting stub configured to connect the upper coil and the lower coil to each other; and
a load configured to receive a power from the upper coil or the lower coil,
wherein the first planar spiral coil and the second planar spiral coil are configured to receive power transmitted by an external wireless power transmitting device and deliver the power to the load.

10. The antenna device of claim 9 , further comprising:
a capacitor connected between the upper coil and the lower coil in an electrical parallel with the connecting hub.

11. The antenna device of claim 9 ,
wherein the upper coil further comprises a third planar spiral coil disposed on the first tubular spiral coil,
wherein the lower coil further comprises a fourth planar spiral coil disposed beneath the second tubular spiral coil.

12. The antenna device of claim 9 , wherein each of the first and second tubular spiral coils comprises:
a plurality of turns of wire having a shape wound along an outer circumferential surface of one selected from a three-dimensional object group consisting of a rectangular parallelepiped, a polygon column, a cylinder, an elliptic cylinder.

13. The antenna device of claim 12 , wherein each of the first and second planar spiral coils comprises:
a spirally wound conductor having a shape of a rectangular, polygonal, circular, or oval disk.

14. The antenna device of claim 9 , further comprising:
a power delivery loop disposed to be parallel with the upper coil and the lower coil and spaced apart from the upper coil and the lower coil,
wherein the load receives the power from the upper coil or the lower coil through the power delivery loop.

15. The antenna device of claim 14 , wherein the power delivery loop provides the load with an electrical energy associated with a current induced by an electromagnetic field generated by the upper coil or the lower coil.

16. The antenna device of claim 9 , wherein a length of the connecting stub is adjustable to allow a change of a resonance frequency of the wireless power transmitting device.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Yun Je Hoon
• Kim Sang Won
• Kim Seong Min
• Moon Jung Ick
• Byun Woo Jin
• Jang Dong Won
• Cho In Kui

Classifications

• 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

• H02J50/12 Primary

  of the resonant type · CPC title

• H01F38/14 Primary

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

• H02J50/402

  the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas · CPC title