Nested flat wound coils forming windings for transformers and inductors

Patent metadata

Field	Value
Publication number	US-12476038-B2
Application number	US-202117306476-A
Country	US
Kind code	B2
Filing date	May 3, 2021
Priority date	May 6, 2016
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

An electro-magnetic device is provided, including a first winding set of nested windings, and a second winding set of nested windings positioned adjacent to the first winding set. A method of making an electro-magnetic device including a first winding set of nested windings, and a second winding set of nested windings positioned adjacent to the first winding set is also provided.

First claim

What is claimed is:

1 . An electro-magnetic device comprising:
a first winding comprising a wire, the first winding having an opening defining a first diameter; a second winding comprising a wire, the second winding having an opening defining a second diameter, the second winding sized to be nested within the opening of the first winding, the first winding and the second winding forming a first winding set having a lowermost surface and an uppermost surface; a third winding comprising a wire, the third winding having an opening defining a third diameter; a fourth winding comprising a wire, the fourth winding having an opening defining a fourth diameter, the fourth winding sized to be nested within the opening of the third winding, the third winding and the fourth winding forming a second winding set having a lowermost surface and an uppermost surface, wherein the first winding, the second winding, the third winding and the fourth winding are wound around and completely encircle an axis of the electro-magnetic device; and a support frame comprising a plurality of pins oriented parallel to the axis, wherein an end of each of the first winding, the second winding, the third winding and the fourth winding are connected to a different one of the pins; wherein the first winding set is positioned above and adjacent to the second winding set, and wherein the lowermost surface of the first winding set is adjacent to and facing the uppermost surface of the second winding set, and wherein at least one of the first winding, the second winding, the third winding, or the fourth winding comprises a flat wire having a rectangular cross-section, and wherein at least one of first winding, the second winding, the third winding, or the fourth winding has an oblong or round cross-section.

2 . The device of claim 1 , wherein the first winding has a thickness, and wherein the second winding has a second thickness.

3 . The device of claim 2 , wherein the thickness of the first winding is substantially the same as the thickness of the second winding.

4 . The device of claim 2 , wherein the thickness of the first winding is different than the thickness of the second winding.

5 . The device of claim 1 , wherein the first winding set has a thickness, and the second winding set has a thickness.

6 . The device of claim 5 , wherein the wherein the thickness of the first winding set is substantially the same as the thickness of the second winding set.

7 . The device of claim 5 , wherein the wherein the thickness of the first winding set is different than the thickness of the second winding set.

8 . The device of claim 1 , wherein each winding has a first terminal end and an opposite second terminal end.

9 . The device of claim 8 , wherein at least one of the terminal ends of the winding comprising the flat wire having a rectangular cross-section is twisted and oriented approximately 90 degrees from the winding.

10 . The device of claim 1 , wherein at least one of the windings comprises a multifilar wire.

11 . The device of claim 1 , wherein the diameters of the openings of the first winding and the third winding are essentially equal.

12 . The device of claim 11 , wherein the diameters of the openings of the second winding and the fourth winding are essentially equal.

13 . The device of claim 1 , wherein the first winding set and the second winding set are coaxially aligned.

14 . The device of claim 1 , wherein the wire used to form the first winding is of a same type as the wire used to form the second winding.

15 . The device of claim 1 , wherein the wire used to form the first winding is of a different type than the wire used to form the second winding.

16 . The device of claim 1 , wherein the wire used to form the third winding is of a same type as the wire used to form the fourth winding.

17 . The device of claim 1 , wherein the wire used to form the third winding is of a different type than the wire used to form the fourth winding.

18 . The device of claim 1 , further comprising:
a fifth winding comprising a wire, the fifth winding having an opening defining a fifth diameter; a sixth winding comprising a wire, the sixth winding having an opening defining a sixth diameter, the sixth winding sized to be nested within the opening of the fifth winding, the fifth winding and sixth winding forming a third winding set having a lowermost surface and an uppermost surface; wherein the third winding set is positioned above and adjacent to the first winding set, and wherein the lowermost surface of the third winding set is adjacent to and facing the uppermost surface of the first winding set.

19 . The device of claim 1 , further comprising an outer winding comprising a wire, the outer winding having an opening defining a diameter, the opening of the outer winding configured to surround and receive one of the second winding or the fourth winding in a nested arrangement.

20 . The electro-magnetic device of claim 1 , wherein at least one of the first winding, the second winding, the third winding, or the fourth winding comprises a flat wire having a width and a thickness, the width being greater than the thickness, and wherein the width extends substantially parallel to the axis around which first winding, the second winding, the third winding, and the fourth winding are wound.

21 . The electro-magnetic device of claim 1 , wherein at least one of the first winding, the second winding, the third winding, or the fourth winding comprises a pancake wound coil.

22 . A method for manufacturing a transformer with nested flat wound coils, the method comprising:
forming a first winding comprising a wire, the first winding having an opening defining a first diameter; forming a second winding comprising a wire sized to be nested within the opening of the first winding, the second winding having an opening defining a second diameter; positioning the second winding within the opening of the first winding to form a first winding set having a thickness and a lowermost surface and an uppermost surface; forming a third winding comprising a wire, the third winding having an opening defining a third diameter; forming a fourth winding comprising a wire sized to be nested within the opening of the third winding, the fourth winding having an opening defining a fourth diameter; positioning the fourth winding within the opening of the third winding to form a second winding set having a thickness and a lowermost surface and an uppermost surface; positioning the first winding set above and adjacent to the second winding set, and positioning the lowermost surface of the first winding is adjacent to and facing the uppermost surface of the second winding set, wherein the first winding, the second winding, the third winding and the fourth winding are wound around and completely encircle an axis of the transformer; providing a support frame comprising a plurality of pins oriented parallel to the axis; and connecting an end of each of the first winding, the second winding, the third winding and the fourth winding to a different one of the pins; wherein at least one of the first winding, the second winding, the third winding, or the fourth winding comprises a flat wire having a rectangular cross-section, and wherein at least one of the first winding, the second winding, the third winding, or the fourth winding has an oblong or round cross-section.

23 . The method of c

Assignees

• Vishay Dale Electronics Llc

Inventors

• Foley Matthew J

Classifications

• H01F27/2871

  Pancake coils · CPC title

• H01F41/098

  Mandrels; Formers · CPC title

• H01F41/076

  Forming taps or terminals while winding, e.g. by wrapping or soldering the wire onto pins, or by directly forming terminals from the wire · CPC title

• H01F41/061 Primary

  Winding flat conductive wires or sheets · CPC title

• H01F27/2852

  Construction of conductive connections, of leads · CPC title