Method for producing a winding for an inductive component and inductive component

Abstract

The invention relates to a method for producing a winding for an inductive component, comprising the following steps: producing a planar, one-piece and electrically conductive blank, said blank having at least a first connection section, a second connection section and a strip-shaped winding section of a specific constant width; and deforming the planar blank to construct a winding by winding a bending die with the winding section.

Description

Technical Field

[0001] The invention relates to a method for producing a winding for an inductive component. The invention also relates to an inductive component having a one-piece winding having a first connecting section and a second connecting section. Background Art

[0002] The invention is intended to improve a method for producing a winding for an inductive component and an inductive component having a one-piece winding. Summary of the invention

[0003] According to the present invention, in the case of a method for manufacturing a winding for an inductive component, the following steps are provided: manufacturing a planar, one-piece and conductive blank, wherein the winding blank is constructed as a single piece and has at least a first connecting section, a second connecting section and a strip-shaped winding section with a constant width; and deforming the planar blank for constructing the winding by means of a winding bending die.

[0004] In the case of windings for inductive components, especially in the case of windings for high current intensity, if the connection section must be connected to the winding wire, for example, welding or soldering must be performed, it is disadvantageous in terms of electrical properties. The connection point has electrical properties different from the connection section and / or the winding wire in principle. However, the machine and especially fully automatic production of single-piece windings is problematic. In the case of the method according to the invention, the winding is manufactured by a planar, single-piece and conductive blank, wherein the blank has a first connection section and a second connection section. The connection section is used to connect with other electrical components, such as a power supply or other circuits. A strip winding section with a constant width is connected to two connection sections in a single-piece manner. The winding section has a constant width, so that the manufactured winding has good electrical properties, because the strip winding section with a constant width behaves comparable to a conventional winding wire. The strip winding section also has a constant thickness over its entire length and therefore has a constant ohmic resistance. Furthermore, the flat blank is deformed to form the winding by means of winding the winding section around the bending die. Of course, winding the bending die with the winding wire is known. Surprisingly, even in the case of a careful choice of the geometry of the flat blank, the strip-shaped winding section can be wound around the bending die in a very simple manner and at the same time the connecting section remains accessible in the case of the finished winding. For example, the connecting section is arranged so that it is in a common plane and can then be soldered to a soldering surface on a printed circuit board, for example. By means of the method according to the invention, a winding for an inductive component is formed in a very simple manner, wherein the winding is constructed in one piece.

[0005] In a development of the invention, in order to form the winding, the winding section is wound around a cylindrical bending die, whereby the winding section acquires a helical shape.

[0006] A common shape for windings of inductive components is a spiral. Surprisingly, if the geometry of a one-piece planar blank is designed accordingly, it is also possible to form a spiral with this blank.

[0007] In a development of the invention, the bending die consists of a magnetically conductive material and forms the core of the inductor component after the winding has been formed.

[0008] Thus, the core of the inductive component can simultaneously provide a bending mold.For example, before deformation, the flat blank is painted and thus obtains a non-conductive layer on its outer side.

[0009] In a development of the invention, the flat, one-piece, electrically conductive blank is produced from an electrically conductive sheet material by means of stamping.

[0010] In this way, blanks can be produced in large quantities in a very simple manner and in a fully automated manner.

[0011] The problem underlying the invention is also solved by an inductive component having a one-piece winding, wherein the winding has a first connecting section, a second connecting section and a strip-shaped winding section with a constant width, wherein the winding is produced from a flat blank by means of a winding-bending die.

[0012] In a development of the invention, a core made of a magnetic material is provided, which is wound with the winding segments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Further features and advantages of the present invention are apparent from the claims and the following description of preferred embodiments in conjunction with the accompanying drawings. In the drawings:

[0014] Figure 1 A flat blank for producing a winding is shown from obliquely above.

[0015] Figure 2 Shown from the side Figure 1 Flat blanks,

[0016] Figure 3 Shown from above Figure 1 Flat blanks,

[0017] Figure 4 Shown from the side Figure 1 The windings are manufactured from blanks, and

[0018] Figure 5 A bending die having a core used as an inductor component is shown. Figure 4 of the winding. DETAILED DESCRIPTION

[0019] Figure 1 A planar blank 10 for producing a winding for an inductive component is shown. The blank 10 has a first connecting section 12 and a second connecting section 14. In the case of a finished winding, the two connecting sections 12, 14 are provided for connection to a circuit, such as a power supply or the like. Each of the connecting sections has a generally rectangular contour with a U-shaped cutout 16. This U-shaped cutout can be used, for example, to align the connecting sections 12, 14 at the finished winding with positioning pins on a printed circuit board.

[0020] A winding section 20 is arranged between the two connecting sections 12, 14, which is designed in the form of a strip and has a constant width. A transition section 22, 24 is also arranged between the winding section 20 and the connecting section 12, wherein the side edges of the transition sections are arranged at an angle of more than 90° relative to the side edges of the winding section 20. However, the side edges of the transition sections 22, 24 are arranged perpendicularly to the side edges of the connecting sections 12, 14 into which they merge. The transition sections 22, 24 are provided to ensure that the winding, which is then generally spiral, transitions into the flat connecting sections 12, 14 after deformation.

[0021] The winding section 20 is arranged obliquely with respect to the side edges of the connecting sections 12, 14 facing each other. This results in a Z-shaped shape of the blank overall. The angle between the connecting sections and the length of the winding section 20 can then determine the pitch angle of the finished winding and also the number of turns of the winding. The connecting sections 12, 14 are wider than the winding section 20.

[0022] Figure 2 A side view of a blank 20 is shown. The blank 20 has a constant thickness over its entire surface. The blank 20 is, for example, punched out of a sheet of constant thickness.

[0023] Figure 3 The blank 20 is shown in a view from above.

[0024] Figure 4 A winding 30 is shown which has been produced from a flat blank 20 by winding the winding section 20 around a bending die. The spiral shape of the winding section 20 can be seen. Furthermore, it can be seen that the connecting sections 12, 14 are arranged in the same plane and are not deformed. The transition sections 22, 24 form the transition between the connecting sections 12, 14 which are flat and arranged in a common plane and the winding section 20 which is deformed into a spiral.

[0025] The winding 30 has a spiral which has a total of four turns. The number of turns can be varied by changing the length of the winding section 20 or also by the diameter of the bending die used during winding.

[0026] Figure 5 An inductor component 40 is shown with a winding 30. A core 50 made of a magnetically conductive material is arranged in a cavity formed by the winding. The core 50 is cylindrical and simultaneously forms a bending die when the winding 30 is produced. For example, the connecting section 12 is fixed in a winding machine and then the winding section 20 is wound around the core 50, which also forms a bending die, so that the spiral shape of the winding 30 is obtained. The connecting section 14 is then arranged so that it is located in a common plane with the connecting section 12.

[0027] The inductor component 40 can then be connected to the solder pads on the printed circuit board via the connecting sections 12 , 14 .

[0028] The present invention enables fully automated production of inductive components with a one-piece winding.

Claims

1. A method for producing a winding (30) for an inductive component (40), the method comprising the steps of: producing a planar, one-piece, electrically conductive blank (10), wherein the blank (10) has at least a first connecting section (12), a second connecting section (14), and a strip-shaped winding section (20) having a constant width; and deforming the planar blank (10) by means of a winding bending die with the winding section (20) to construct the winding (30).

2. The method according to claim 1, wherein, in order to form the winding (30), the winding section (20) is wound around a cylindrical bending die, whereby the winding section (20) acquires a helical shape.

3. The method according to claim 1 or 2, wherein the bending mold consists of a magnetically conductive material and forms a core (50) of an inductive component after the winding (30) is formed.

4. The method according to claim 1, wherein the flat, one-piece, electrically conductive blank (10) is produced from an electrically conductive sheet material by means of stamping.

5. An inductor component (40) having a one-piece winding (30), the one-piece winding having a first connecting section (12), a second connecting section (14) and a strip-shaped winding section (20) of constant width, wherein the winding (30) is manufactured from a flat blank (10) by means of a winding bending die.

6. The inductor component according to claim 5, wherein a core (50) made of a magnetic material is provided, the winding section (20) being wound around the core.

Images