Transformer inductor combination device

Patent metadata

Field	Value
Publication number	US-11380473-B2
Application number	US-201916661408-A
Country	US
Kind code	B2
Filing date	Oct 23, 2019
Priority date	Jul 12, 2019
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

A combined transformer/inductor device includes a core having a central core leg and an outer core leg spaced apart from the central core leg, an inner bobbin disposed around the central core leg, an outer bobbin disposed around the inner bobbin and the central core leg and having an upper portion having a first oblong portion disposed around the outer core leg, a lower portion having a second oblong portion disposed around the outer core leg, and a central portion disposed around the inner bobbin and the central core leg, a first winding wound around the inner bobbin, and a second winding wound around the outer bobbin, the second winding having a first portion wound around the first oblong portion, a second portion wound around the central portion, and a third portion wound around the second oblong portion.

First claim

What is claimed is:

1. A combined transformer/inductor device comprising:
a core having a central core leg and an outer core leg spaced apart from the central core leg;
an inner bobbin disposed around the central core leg;
an outer bobbin disposed around the inner bobbin and the central core leg and having an upper portion having a first oblong portion disposed around the outer core leg, a lower portion having a second oblong portion disposed around the outer core leg, and a central portion disposed around the inner bobbin and the central core leg;
a first winding wound around the inner bobbin; and
a second winding wound around the outer bobbin, the second winding having a first portion wound around the first oblong portion, a second portion wound around the central portion, and a third portion wound around the second oblong portion.

2. The combined transformer/inductor device of claim 1 , wherein the upper portion of the outer bobbin includes a first flange disposed along a first lower edge of the upper portion and the lower portion of the outer bobbin includes a second flange disposed along a first upper edge of the lower portion.

3. The combined transformer/inductor device of claim 2 , wherein the upper portion of the outer bobbin includes a third flange disposed along a second upper edge of the upper portion and the lower portion of the outer bobbin includes a fourth flange disposed along a second lower edge of the lower portion.

4. The combined transformer/inductor device of claim 1 , wherein the central portion of the outer bobbin includes one or more protrusions structured to abut against the inner bobbin to prevent the inner bobbin from moving vertically in one direction beyond a predetermined point within the outer bobbin.

5. The combined transformer/inductor device of claim 1 , wherein the outer bobbin includes at least one first locking feature and the inner bobbin includes at least one second locking feature, wherein the at least one first locking feature is structured to interact with the at least one second locking feature to prevent the inner bobbin and the outer bobbin to rotate with respect to each other.

6. The combined transformer/inductor device of claim 5 , wherein the at least one first locking feature includes one of a post and a notch and the at least one second locking feature includes the other of the post and the notch.

7. The combined transformer/inductor device of claim 1 , wherein the central core leg has a substantially cylindrical shape.

8. The combined transformer/inductor device of claim 1 , wherein the central core leg has a substantially oblong shape.

9. The combined transformer/inductor device of claim 1 , wherein the outer core leg includes a radiused outer surface.

10. The combined transformer/inductor device of claim 9 , wherein the outer core leg has a substantially crescent shape.

11. The combined transformer/inductor device of claim 1 , wherein the core includes an upper core and a lower core.

12. The combined transformer/inductor device of claim 11 , wherein the upper core includes at least one first recess formed along an upper edge of the upper core and the lower core includes at least one second recess formed along a lower edge of lower core, wherein the at least one first and second recesses are structured to receive a strap or clip used to fasten the upper core and the lower core together.

13. The combined transformer/inductor device of claim 1 , wherein the outer core leg and/or the central core leg includes an air gap.

14. The combined transformer/inductor device of claim 1 , wherein the inner bobbin includes at least one notch structured to allow egress of the first winding.

15. The combined transformer/inductor device of claim 1 , wherein the inner bobbin includes at least one ridge formed around at least a portion of a circumference of the inner bobbin.

16. The combined transformer/inductor device of claim 1 , wherein the first winding forms a first winding of a transformer and the second winding forms a second winding of the transformer and a winding of an inductor.

Assignees

• Vishay Dale Electronics Llc

Inventors

• Ebner Jason
• Foley Matthew

Classifications

• H01F17/043

  with two, usually identical or nearly identical parts enclosing completely the coil (pot cores) · CPC title

• H01F27/40 Primary

  Structural association with built-in electric component, e.g. fuse · CPC title

• H01F27/24

  Magnetic cores · CPC title

• H01F5/02

  wound on non-magnetic supports, e.g. formers · CPC title

• H01F2005/022

  wound on formers with several winding chambers separated by flanges, e.g. for high voltage applications · CPC title