CROSSOVER INDUCTOR COIL AND ASSEMBLY FOR WIRELESS TRANSMISSION

• US 20180343042A1
• Filed: 05/25/2018
• Published: 11/29/2018
• Est. Priority Date: 05/26/2017
• Status: Active Grant

• Current Assignee: NuCurrent, Inc.
• Original Assignee: NuCurrent, Inc.
• Inventors: Luzinski, Jason, Alam, Md. Nazmul
• Granted Patent: US 11,283,296 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: H01F 27/28 Coils; Windings; Conductive connections
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/2885 with shields or electrodes shields or electrodes for pancake coils H01F27/2871; construction of electric or magnetic shields or screens H01F27/36
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/361 made of combinations of electrically conductive material and ferromagnetic material
• CPC Class Codes: H01F 27/363 made of electrically conductive material
• CPC Class Codes: H01F 27/366 made of ferromagnetic material
• CPC Class Codes: H01F 27/38 Auxiliary core members; Auxiliary coils or windings
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01Q 7/04 Screened antennas H01Q7/02, H01Q7/06 take precedence
• CPC Class Codes: H02J 50/005 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 Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/23 characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• CPC Class Codes: H02J 50/402 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 Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/263 Multiple coils at either side
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/48 : Transceivers
• CPC Class Codes: H04B 5/72 : for local intradevice communication
• CPC Class Codes: H04B 5/79 : for data transfer in combination with power transfer

Abstract

Various embodiments of inductor coils, antennas, and transmission bases configured for wireless electrical energy transmission are provided. These embodiments are configured to wirelessly transmit or receive electrical energy or data via near field magnetic coupling. The embodiments of inductor coils comprise a figure eight configuration that improve efficiency of wireless transmission efficiency. The embodiments of the transmission base are configured with at least one transmitting antenna and a transmitting electrical circuit positioned within the transmission base. The transmission base is configured so that at least one electronic device can be wirelessly electrically charged or powered by positioning the at least one device in contact with or adjacent to the transmission base.

Claims

1. An inductor coil, comprising:

a) an electrically conductive filar with spaced apart first and second filar ends forming the inductor coil having N number of turns, wherein the inductor coil is capable of generating an inductance at a resonant frequency; and

b) wherein the electrically conductive filar crosses over itself at a crossover intersection thereby forming the inductor coil comprising a first inductor coil loop and a second inductor loop, wherein the crossover intersection lies between the first filar end the second filar end.

2. The inductor coil of claim 1 further comprising an edge feed inductor coil, a center feed inductor coil or a parallel feed inductor coil.

3. The inductor coil of claim 1 wherein a first filar segment of the first inductor coil loop and a second filar segment of the second inductor coil loop are oriented about parallel to each other.

4. The inductor coil of claim 3 wherein a gap separates the first filar segment and the second filar segment.

5. The inductor coil of claim 1 wherein the first inductor coil loop comprises a first filar portion and the second inductor coil loop comprises a second filar portion, the inductor coil configured so that an intersection angle extends between the first portion and the second filar portion at the crossover intersection.

6. The inductor coil of claim 5 wherein the intersection angle ranges from about 1°

to about 89°

.

7. The inductor coil of claim 1 wherein a portion of the first inductor coil loop lies within an area formed by the second inductor coil loop or a portion of the second inductor coil loop lies within an area formed by the first inductor coil loop.

8. The inductor coil of claim 1 wherein an air gap having an air gap width extends between adjacent inductor coil turns and the filar having a filar thickness oriented about perpendicular to a filar length that extends between the first and second filar ends, wherein a ratio of the air gap width to the filar thickness is less than one.

9. The inductor coil of claim 1 wherein a filar width extends between opposing filar sidewalls each having an exterior sidewall surface and a filar thickness oriented about perpendicular to the filar width extends between top and bottom filar surfaces, wherein a filar sidewall angle extends between a first imaginary line that is co-planar to one of the exterior sidewall surfaces and a second imaginary line that is co-planar to the bottom filar surface.

10. The inductor coil of claim 9 wherein the filar sidewall angle ranges from about 75°

to about 90°

.

11. The inductor coil of claim 1 further configured within an electronic device.

12. The inductor coil of claim 1 wherein the resonant frequency ranges from about 1 kHz to about 100 MHz.

13. The inductor coil of claim 1 further configured to wirelessly transmit or receive electrical power from about 100 mW to about 100 W.

14. The inductor coil of claim 1 wherein a capacitor is electrically connected to the inductor coil, the capacitor selected from the group consisting of a surface mount capacitor, a parallel plate capacitor, an interdigitated capacitor, and combinations thereof.

15. The inductor coil of claim 1 having a multilayer multiturn construction.

16. The inductor coil of claim 1 wherein the crossover is capable of shaping magnetic fields for wireless power transfer.

17. An inductor coil assembly configured to transmit or receive wireless electrical energy, the inductor coil assembly comprising:

a. a first substrate having a first substrate thickness extending between opposed top and bottom first substrate surfaces, wherein the first substrate comprises an electrically insulative material;

b. a second substrate having a second substrate thickness extending between opposed top and bottom second substrate surfaces, an adhesive material residing on at least one of the top and bottom second substrate surfaces;

c. at least one inductor coil positioned on at least one of the top and bottom second substrate surfaces;

d. wherein the inductor coil comprises an electrically conductive filar with spaced apart first and second filar ends having N number of turns, wherein the inductor coil is capable of generating an inductance at a resonant frequency; and

e. wherein the electrically conductive filar crosses over itself at a crossover intersection thereby forming the inductor coil comprising a first inductor coil loop and a second inductor coil loop, and wherein the crossover intersection lies between the first filar end and the second filar end.

18. The inductor coil assembly of claim 17 wherein at least one, first opening extends through the first substrate thickness.

19. The inductor coil assembly of claim 17 wherein at least one, second opening extends through the second substrate thickness.

20. The inductor coil assembly of claim 17 wherein at least one, first opening extends through the first substrate thickness and at least one, second opening extends through the second substrate thickness, wherein the first and second substrates are positioned so that the first and second openings are aligned.