Induction component

Patent metadata

Field	Value
Publication number	US-9484143-B2
Application number	US-201314130826-A
Country	US
Kind code	B2
Filing date	Jun 18, 2013
Priority date	Jan 17, 2013
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

An induction component contains, in a housing, a coil, which has a coil core with two end surfaces and a coil winding. The housing consists of a housing base, in turn consisting of plastic, and a hood-like upper part connected thereto. A holder, in which the coil is held non-displaceably in the direction of its longitudinal axis, is arranged on the housing base. It is thus ensured that the air gaps to the right and left between the end surfaces of the coil core and the inner face of the housing upper part are constant.

First claim

The invention claimed is:

1. An induction component, comprising
a coil core ( 18 ) having a coil winding ( 20 ) and two end surfaces ( 19 ),
a housing surrounding the coil,
a holder for the coil core ( 18 ), said holder being arranged in the housing, having a bearing block ( 10 ) including
a conical bearing rest for each respective end region of the coil core ( 18 ), the conical bearing rests each including an upwardly open cavity ( 11 ) having a curvature corresponding to the diameter of the coil core ( 18 ), and
a rib ( 13 ) defining the conical bearing rest and engaging the end surface ( 19 ) of the coil core ( 18 ); and

the coil core ( 18 ) being held in the holder non-displaceably in the longitudinal direction, and also comprising
a distance, forming a gap, between the end surfaces ( 19 ) of the coil core ( 18 ) and the inner face of the housing in the region opposite the end surfaces ( 19 ) of the coil core ( 18 ).

2. The induction component as claimed in claim 1 , wherein the outer face ( 12 ) of the bearing block ( 10 ) bears in a planar manner against the inner face of the housing.

3. The induction component as claimed in claim 1 , wherein the housing has a hood-like upper part ( 1 ) with a housing base ( 2 ).

4. The induction component as claimed in claim 3 , wherein the holder is arranged on the housing base ( 2 ), in particular is formed integrally on the housing base ( 2 ).

5. The induction component as claimed in claim 3 , wherein the housing upper part ( 1 ) consists of magnetically conductive material and the housing base ( 2 ) consists of non-conductive material.

6. The induction component as claimed in claim 1 , comprising electrodes ( 14 ) arranged on the inner face of the housing for connection to the ends ( 21 , 22 ) of the coil winding ( 20 ).

7. The induction component as claimed in claim 6 , wherein the electrodes run parallel to the walls of the housing and have a flat contact surface ( 15 ) for the end region of the coil winding, wherein the ends ( 21 , 22 ) of the coil winding ( 20 ) are preferably welded via their lateral surfaces to the electrodes.

8. The induction component as claimed in claim 3 , wherein the housing base ( 2 ) has a rectangular shape with chamfered corners and the housing upper part ( 1 ) has protrusions ( 5 ) on its end edge ( 6 ), said protrusions being formed in a manner complementary to these chamfered corners.

9. The induction component as claimed in claim 3 , wherein the housing base ( 2 ), on its upper face ( 8 ) in the region of the chamfered corners, has inclined surfaces ( 9 ) falling outwardly, with which inclined surfaces ( 7 ) formed on the inner face of the protrusions ( 5 ) of the housing upper part ( 1 ) cooperate.

10. A method for installing an induction component as claimed in claim 1 , comprising the following method steps:
a coil is wound and the wire ends ( 21 , 22 ) are wetted with solder,
the coil is slid onto the coil core ( 18 ),
the coil core ( 18 ) is placed onto the bearing blocks ( 10 ),
the ends of the coil winding ( 20 ) are welded to electrodes of the housing base ( 2 ),
glue is injected into the housing upper part ( 1 ),
the housing base ( 2 ) is connected to the upper part ( 1 ),
the glue is left to cure.

Assignees

• Wuerth Elektronik Eisos Gmbh & Co Kg
• Würth Elektronik Eisos Gmbh & Co Kg

Inventors

• Nguyen Anh-Nguyen
• Muskat Tim

Classifications

• H01F17/045

  with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core · CPC title

• H01F41/0206

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

• H01F3/14 Primary

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

• H01F27/02

  Casings · CPC title

• H01F27/2823 Primary

  Wires (H01F27/2866 takes precedence) · CPC title