Method for forming a winding for an induction component and induction component

Abstract

To improve a method for forming a winding for a guide component and a guide component having an integrated winding. [Solution] The present invention relates to a method for forming a winding for an induction component, comprising the steps of: forming a planar, integral, and electrically conductive cut piece, wherein the cut piece has at least one first connection section, a second connection section, and a winding section in the shape of a strip having a certain width; and forming a winding by deforming the planar cut piece by winding the winding section onto a bending die.

Description

TECHNICAL FIELD

[0001] The present invention relates to a method of forming a winding piece for an inductive component. The present invention further relates to an inductive component comprising a unitary winding piece having a first connection section and a second connection section. SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0002] An object of the present invention is to improve a method of forming a winding piece for an inductive component and an inductive component having a unitary winding piece. MEANS FOR SOLVING THE PROBLEMS

[0003] According to the present invention, in the method of forming a winding piece for an inductive component, the following steps are provided: a step of forming a planar, unitary and electrically conductive cut piece, wherein the wound cut piece is integrally formed and has at least one first connection section, a second connection section, and a strip-shaped winding piece section with a constant width; and a step of deforming the planar cut piece by winding the winding piece section around a bending die to form the winding piece.

[0004] In windings for inductive components, particularly those designed for high current strengths, there are drawbacks in terms of electrical properties when connection sections must be joined to the winding wire, for example, by soldering or welding. The joints, in principle, have different electrical properties from the connection sections and / or the winding wire. However, there are problems in mechanically and especially fully automatically forming a single winding. In the method according to the present invention, the winding is formed from a planar, integral, and electrically conductive cut piece, the cut piece having a first connection section and a second connection section. These connection sections are used to connect to other electrical components, such as current supplies or other electrical circuits. A strip-shaped winding section having a constant width is integrally joined to the two connection sections. Because this winding section has a constant width, the resulting winding has good electrical properties, since a winding section with a constant width behaves similarly to a conventional winding wire. The strip-shaped winding section also has a constant thickness and, consequently, a constant ohmic resistance along its entire length. Furthermore, the deformation of planar connecting pieces to form a winding is performed by winding the winding section onto a bending die. Winding a winding wire onto a bending die is, of course, known. Surprisingly, if the geometric shape of the flat cutting piece is carefully selected, a strip-shaped winding section can also be wound onto a bending die in a very simple manner, and at the same time, the connecting section remains accessible in the resulting winding. For example, these connecting sections are arranged such that they are located in a common plane and can then be soldered onto a printed circuit board, for example, by a soldering surface. By the method according to the present invention, a winding for an induction component is obtained in a very simple manner, and the winding is integrally formed.

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

[0006] The usual shape of a spiral for a guide component is a helix. Surprisingly, a spiral can also be formed from a single, planar piece, provided that the shape of the cut piece is properly formed.

[0007] In the development of the present invention, the bending die is made of a magnetically conductive material, and after the winding is formed, the core of the induction component is formed.

[0008] This allows the core of the induction component to simultaneously provide a bending mold. For example, a planar cut piece is painted before deformation, thereby acquiring an electrically non-conductive layer on its outside.

[0009] In the development of the present invention, a planar, integral, and electrically conductive cut piece is formed by punching it out from an electrically conductive metal sheet.

[0010] In this way, large quantities of cut pieces are formed automatically in an extremely simple manner.

[0011] The problems of the present invention can also be solved by an induction component having an integrated winding piece, in which case the winding piece has a first connecting section, a second connecting section, and a winding piece section of a certain width in the shape of a strip, and the winding piece is formed by winding a planar cut piece onto a bending die.

[0012] In the development of this invention, a core made of a magnetic material is provided, and a winding section is wound around the core.

[0013] Other features and advantages of the present invention will be apparent from the claims and from the description of preferred embodiments made below in relation to the drawings. The drawings show the following: [Brief explanation of the drawing]

[0014] [Figure 1] Figure 1 shows a planar cut section for forming a rolled section, viewed from an oblique angle above. [Figure 2] Figure 2 shows a planar cross-section of Figure 1 viewed from the side. [Figure 3] Figure 3 shows a top view of a planar cross section of Figure 1. [Figure 4] Figure 4 shows a side view of the roll formed from the cut piece in Figure 1. [Figure 5] Figure 5 shows the coil shown in Figure 4, which has a bend shape used as the core of the induction component. [Modes for carrying out the invention]

[0015] Figure 1 shows a planar cut piece 10 for forming a winding for an induction component. The cut piece 10 has a first connection section 12 and a second connection section 14. The two connection sections 12 and 14 are provided for connecting to an electrical circuit, such as a current supply, in the finished winding. Each of the connection sections has a general rectangular contour with a U-shaped notch. The U-shaped notch can be used, for example, to orient the connection sections 12 and 14 of the finished winding in contact with positioning pins on a printed circuit board.

[0016] A winding section 20 is provided between the two connecting sections 12 and 14, and this winding section is formed in a narrow strip shape and has a certain width. Further transition sections 22 and 24 are provided between the winding section 20 and the connecting section 12, respectively, and the side edges of the transition sections are positioned at an angle greater than 90° with respect to the side edges of the winding section 20. However, the side edges of the transition sections 22 and 24 are positioned perpendicular to the side edges of the connecting sections 12 and 14 to which they transition. The transition sections 22 and 24 are provided to ensure that, after deformation, the transition from a helical winding to a planar connecting section 12 and 14 as usual.

[0017] The winding section 20 is positioned diagonally to the opposing side edges of the connecting sections 12 and 13. This results in a Z-shape for the cut piece as a whole. In this case, the angle between the connecting sections and the length of the winding section 20 also determine the twist angle of the resulting winding and the number of turns of the winding. The connecting sections 12 and 14 are wider than the winding section 20.

[0018] Figure 2 shows a side view of the cut piece 20. The cut piece 20 has a constant thickness across its entire surface area. The cut piece 20 is punched out, for example, from a metal sheet of a certain thickness.

[0019] Figure 3 shows the cut piece 20 viewed from above.

[0020] Figure 4 shows a coiled section 30, which is formed by winding a coiled section 20 onto a bent shape from a planar cut piece 20. The spiral shape of the coiled section 20 is visible. Furthermore, it is recognized that the connecting sections 12 and 14 are located in the same plane and are not deformed. The transition sections 22 and 24 form a transition between the connecting sections 12 and 14, which are planar and located in a common plane, and the coiled section 20, which is deformed at a certain angle.

[0021] The winding piece 30 has a spiral, and the spiral has a total of four turns. The number of turns can be changed by changing the length of the winding piece section 20, or by changing the diameter of the bending die used when winding.

[0022] Figure 5 shows an inductive component 40 having a winding strip 30. A core 50 made of a magnetically conductive material is arranged inside the hollow chamber formed by winding. The core 50 is formed in a cylindrical shape, and at the same time forms a bending die for forming the winding strip 30. For example, the connection section 12 is fixed in a winding machine, and then the winding strip section 20 is wound around the core 50 which also forms the bending die, whereby the helical shape of the winding strip 30 is produced. The connection section 14 is then arranged so as to lie in a common plane with the connection section 12.

[0023] Thereafter, the inductive component 40 can be bonded onto a printed circuit board by means of bonding pads via the connection sections 12 and 14.

[0024] The present invention makes it possible to fully automatically form an inductive component having a one-piece winding strip.

Claims

1. A method for forming a winding piece (30) for a guide component (40), A step of forming a planar, integral, and electrically conductive cut piece (10), wherein the cut piece (10) has at least one first connecting section (12), a second connecting section (14), and a narrow, rolled section (20) having a certain width, The steps include: forming the rolled piece (30) by deforming the planar cut piece (10) by winding the rolled piece section (20) around a bending die; A method having.

2. The method according to claim 1, wherein the winding section (20) is wound around a cylindrical bending die to form the winding piece (30), and the winding section (20) obtains a helical shape.

3. The method according to claim 1 or 2, wherein the bending die is made of a magnetically conductive material, and the core (50) of the induction component is formed after the winding piece (30) is formed.

4. The method according to any one of claims 1 to 3, wherein the planar, integral, and electrically conductive cut piece (10) is formed by punching out an electrically conductive metal sheet.

5. An induction component (40) having an integral winding piece (30), wherein the winding piece (30) has a first connecting section (12), a second connecting section (14), and a winding piece section (20) of a certain width in the shape of a strip, and the winding piece (30) is formed by winding a planar cut piece (10) into a bending shape.

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

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