WIRELESS POWER OUTLET

• US 20150214752A1
• Filed: 04/09/2015
• Published: 07/30/2015
• Est. Priority Date: 01/29/2007
• Status: Abandoned Application

• Current Assignee: Powermat Technologies, Ltd.
• Original Assignee: Powermat Technologies, Ltd.
• Inventors: GLUZMAN, Ilya, ROFE, Arik, MACH, Elieser
• Application Number:
  US14/682,741
• Publication Number:
  US 20150214752A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

A wireless power outlet configured to transmit power to a wireless power receiver is provided. The wireless power outlet comprises a metal shielding comprising a substantially circular base and a core protruding therefrom, a primary inductive coil constituted by two substantially circular windings one atop the other and giving rise to an internal space, the core being received within the space, and a power source comprising a driver configured to provide an oscillating driving voltage to the primary inductive coil. The base has a diameter which is at least about 10% larger than an outer diameter of the windings, the circular windings comprise a wire having between 165 and 175 thin wire strands, and the space formed within the winding has a diameter between 20 and 21 mm.

Claims

1. A wireless power outlet configured to transmit power to a wireless power receiver, the wireless power outlet comprising:

a metal shielding comprising a substantially circular base and a core protruding therefrom;

a primary inductive coil constituted by two substantially circular windings one atop the other and giving rise to an internal space, said core being received within the space; and

a power source comprising a driver configured to provide an oscillating driving voltage to said primary inductive coil;

wherein;

said base has a diameter which is at least about 10% larger than an outer diameter of said windings;

said circular windings comprise a wire having between 165 and 175 thin wire strands; and

said space has a diameter between 20 and 21 mm.

2. The wireless power outlet according to claim 1, wherein said wire is litz wire.

3. The wireless power outlet according to claim 2, wherein said wire consists of 170 strands.

4. The wireless power outlet according to claim 2, wherein the diameter of each of said strands is no more than twice the skin depth of the conductive material of the wire, at an operating AC current and frequency of the wireless power outlet.

5. The wireless power outlet according to claim 1, wherein each of said windings is formed having nine turns.

6. The wireless power outlet according to claim 1, wherein said shielding is made from a material selected from magnesium ferrite and nickel.

7. The wireless power outlet according to claim 1, wherein said core is substantially circular and is configured to be snuggly received within said space.

8. The wireless power outlet according to claim 1, wherein said core is substantially circular and has a diameter of about 20 mm.

9. The wireless power outlet according to claim 1, wherein said base has a thickness of about 2.75 mm.

10. The wireless power outlet according to claim 9, wherein said shielding has a thickness of about 6 mm.

11. The wireless power outlet according to claim 1, having a quality-factor of at least about 140.

12. The wireless power outlet according to claim 1, configured to operate in a range between about 100 kHZ and about 500 kHz.

13. The wireless power outlet according to claim 1, further comprising a controller configured to direct operation thereof.