Magnetic core with flexible packaging

Patent metadata

Field	Value
Publication number	US-10847293-B2
Application number	US-201515506231-A
Country	US
Kind code	B2
Filing date	Oct 22, 2015
Priority date	Nov 25, 2014
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

The disclosure provides a core, comprising a body formed from a winding of tape shaped material, and a package encasing the body. A single gap is formed in the body and the package. A clamp is connected to the package to flex a flexible section of the package to reduce the gap.

First claim

What is claimed is:

1. A magnetic core, comprising:
a core body formed from a winding of material;
a package that receives the core body, the package including at least a partially flexible portion, an outer surface, and an inner surface defining a central opening of the core;
a gap formed though the core body and the package between the outer surface of the package and the inner surface of the package;
wherein the core is configured to be flexibly movable between a compressed state wherein the gap is decreased to a closed position and an uncompressed state wherein the gap is increased to an opened position; and
a clamp configured to move between a first position in which the clamp secures the core in the compressed state and a second position in which the clamp permits the core to move to the uncompressed state to permit passage of a wire into the central opening.

2. The core of claim 1 , wherein the core body is formed in the shape of a toroid.

3. The core of claim 1 , wherein the material is a flexible magnetic material.

4. The core of claim 1 , wherein the package is formed of at least one of rubber or plastic.

5. The core of claim 1 , further comprising a sealing material disposed in the gap to protect the core body from environmental conditions.

6. The core of claim 1 , wherein the core body has a first end defining one side of the gap, a second end defining another side of the gap, and a continuous section extending between the first end and the second end.

7. The core of claim 1 , further comprising a movable member coupled to the package to permit passage of a wire through the gap and into the central opening and to inhibit passage of the wire out of the central opening.

8. The core of claim 7 , wherein the movable member is a biased hinge having one end attached to the inner surface of the package on one side of the gap and a flexible body extending across the gap.

9. A core, comprising:
a body formed from a winding of tape shaped material;
a package encasing the body, the package having an outer surface and an inner surface defining a central opening, the outer surface being radially outward of an outer surface of the body and the inner surface being radially inward of an inner surface of the body, the package including a flexible section configured to flex;
a single gap formed in the body and the package that extends between the outer surface of the package and the inner surface of the package through the body; and
a clamp connected to the package, the clamp having a first end connected to the package on a first side of the gap and a second end connected to the package on a second side of the gap, the clamp being movable to a closed position thereby flexing the flexible section of the package such that the first side of the gap is moved toward the second side of the gap to reduce the gap;
wherein the clamp is configured to move to an opened position thereby permitting the flexible section of the package to return to an unflexed state such that the gap is increased to permit passage of a wire into the central opening.

10. The core of claim 9 , wherein the body is formed of magnetic material wound into the shape of a toroid.

11. The core of claim 10 , wherein the magnetic material is a flexible magnetic material.

12. The core of claim 9 , wherein the package is formed of at least one of rubber or plastic.

13. The core of claim 9 , further comprising a sealing material disposed in the gap to protect the body from environmental conditions.

14. The core of claim 9 , wherein the body has a first end defining one side of the gap, a second end defining another side of the gap, and a continuous section extending between the first end and the second end.

15. The core of claim 9 , further comprising a movable member coupled to the package to permit passage of a wire through the gap and into the central opening and to inhibit passage of the wire out of the central opening.

16. A method of forming a magnetic core, comprising:
winding material into a core body;
enclosing the body in a package having a partially flexible portion, an outer surface, and an inner surface defining a central opening of the core;
forming a gap through the body and the package between the outer surface of the package and the inner surface of the package;
installing a sealing material in the gap to protect the body from environmental conditions; and
attaching a clamp to the package, the clamp being configured to move between a first position in which the clamp secures the core in a closed position wherein the gap is decreased and a second position in which the clamp permits the core to move to an opened position wherein the gap is increased to permit passage of a wire into the central opening.

17. The method of claim 16 , further comprising coupling a movable member to the package to permit passage of a wire through the gap and into the central opening and to inhibit passage of the wire out of the central opening.

18. The method of claim 17 , wherein the movable member is a biased hinge having one end attached to the inner surface of the package on one side of the gap and a flexible body extending across the gap.

Assignees

• Cummins Inc

Inventors

• Pandey Nikhil
• Becker Philip E
• Gonzalez Jr Miguel Angel
• De Anirban

Classifications

• H01F17/06

  with core substantially closed in itself, e.g. toroid · CPC title

• H01F3/04 Primary

  made from strips or ribbons · CPC title

• H01F3/14

  Constrictions; Gaps, e.g. air-gaps (in magnetic shunt paths H01F3/12) · CPC title

• H01F27/02

  Casings · CPC title

• H01F2017/065

  Core mounted around conductor to absorb noise, e.g. EMI filter · CPC title