Low-profile transformer and method of making same

Patent metadata

Field	Value
Publication number	US-10236111-B2
Application number	US-201715486176-A
Country	US
Kind code	B2
Filing date	Apr 12, 2017
Priority date	Apr 12, 2017
Publication date	Mar 19, 2019
Grant date	Mar 19, 2019

Abstract

Techniques and mechanisms for delivering power with a transformer. In an embodiment, the transformer comprises a dielectric slab structure, a first conductor, a layer of ferromagnetic material disposed around first windings of the first conductor, and a second conductor which forms second windings around the layer of ferromagnetic material. For one of the first windings or one of the second windings, a cross-section of the winding conforms to a rectangle, wherein a width of the cross-section which is more than a height of the cross-section. A ferromagnetic material of the ferrite layer extends between successive ones of the first windings. In another embodiment, a volume fraction of the ferromagnetic material in the ferrite layer is equal to or less than ninety seven percent (97%).

First claim

What is claimed is:

1. A transformer device comprising:
a dielectric slab structure;
a first conductor to conduct a first signal, wherein the first conductor forms first windings around the dielectric slab structure, wherein a first cross-section of one of the first windings conforms to a first shape other than any circle, wherein the first cross-section is orthogonal to a direction in which the first signal is to flow;
a ferrite layer disposed surrounding the dielectric slab structure and the first windings, wherein a ferromagnetic material of the ferrite layer extends between successive ones of the first windings, wherein a volume fraction of the ferromagnetic material in the ferrite layer is equal to or less than ninety seven percent (97%); and
a second conductor to conduct a second signal, wherein the second conductor forms second windings which extend surrounding the first windings and surrounding a portion of the ferrite layer, wherein a second cross-section of one of the second windings conforms to a second shape other than any circle, wherein the second cross-section is orthogonal to a direction in which the second signal is to flow.

2. The transformer device of claim 1 , wherein a difference between a first width of the first cross-section and a second width of second cross-section is at least twenty percent of the second width.

3. The transformer device of claim 1 , wherein, for one of the first cross-section and the second cross-section, a height-to-width ratio of the cross-section is equal to or less than 0.35.

4. The transformer device of claim 1 , wherein a difference between a first height-to-width ratio of the first cross-section and a second height-to-width ratio of the second cross-section is at least ten percent of the second height-to-width ratio.

5. The transformer device of claim 1 , wherein, for one of the first windings and the second windings, a separation-to-width ratio of the windings is at least 10%.

6. The transformer device of claim 1 , wherein the first windings and the second windings each have a respective separation-to-width ratio which is at least 20%.

7. The transformer device of claim 1 , wherein a difference between a first separation-to-width ratio of the first winding and a second separation-to-width ratio of the second windings is at least ten percent of the second separation-to-width ratio.

8. The transformer device of claim 1 , wherein a thickness of the ferrite layer is equal to or less than 5 mm.

9. A system comprising:
a transformer device comprising:
a dielectric slab structure;
a first conductor which forms first windings around the dielectric slab structure, wherein a first cross-section of one of the first windings conforms to a first shape other than any circle, wherein the first cross-section is orthogonal to a direction in which the first signal is to flow;
a ferrite layer disposed surrounding the dielectric slab structure and the first windings, wherein a ferromagnetic material of the ferrite layer extends between successive ones of the first windings, wherein a volume fraction of the ferromagnetic material in the ferrite layer is equal to or less than ninety seven percent (97%); and
a second conductor which forms second windings surrounding the first windings and surrounding a portion of the ferrite layer, wherein a second cross-section of one of the second windings conforms to a second shape other than any circle, wherein the second cross-section is orthogonal to a direction in which the second signal is to flow;

first circuitry coupled to conduct a first signal via the first conductor;
second circuitry coupled to conduct a second signal via the second conductor; and
a display device coupled to the first circuitry and the second circuitry, the display device to display an image based on the first signal and the second signal.

10. The system of claim 9 , wherein a difference between a first width of the first cross-section and a second width of second cross-section is at least twenty percent of the second width.

11. The system of claim 9 , wherein, for one of the first cross-section and the second cross-section, a height-to-width ratio of the cross-section is equal to or less than 0.35.

12. The system of claim 9 , wherein a difference between a first height-to-width ratio of the first cross-section and a second height-to-width ratio of the second cross-section is at least ten percent of the second height-to-width ratio.

13. The system of claim 9 , wherein, for one of the first windings and the second windings, a separation-to-width ratio of the windings is at least 10%.

14. The system of claim 9 , wherein a thickness of the ferrite layer is equal to or less than 5 mm.

Assignees

• Intel Corp

Inventors

• Sundaram Arvind

Classifications

• H05K5/0017

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• H01F41/0206

  Manufacturing of magnetic cores by mechanical means (magnetic cores per se H01F27/24) · CPC title

• G06F1/1616

  with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position · CPC title

• H01F27/24

  Magnetic cores · CPC title

• H01F41/098

  Mandrels; Formers · CPC title