ES2434719T3 - Inductive component with magnetic core - Google Patents

Abstract

Inductive component with at least one casing (1), in which one or more columns of magnetic core are housed and on which at least one winding (16) is arranged, the casing (1) presenting interior lining surfaces that delimit its space interior and in which several ribbed oresalts or nopas nerves (3; 3a; 4; 4a) are arranged, which penetrate radially into the interior space, or grooves (89) with intermediate layers (78-80), the interior space being subdivided by ribs or ribs or ribs (3; 3a; 4; 4a) or grooves (89) with intermediate layers (78-80) in several chambers (76) aligned with each other to accommodate core disks or core parts (9; 31, 31) of the magnetic core column, characterized in that the core disks or core parts (9; 30, 31) are fixed immobile by means of the encapsulated mass poured into the chambers (76), with an encapsulation of interior structure, in which the volume d Essential between the chambers and the volume of the disks or core parts are filled with encapsulated mass.

Description

Inductive component with magnetic core.

5 Field of the invention

The invention relates to an inductive component with magnetic core, in particular shock coils, transducers, transformers, converters and similar inductive components.

10 State of the art

The state of the art is represented, for example, in EP1501106A1 of the same applicant. This application shows the new ferrite and air gap technologies, among others, in the form of the so-called sinusoidal shock coils that are used primarily in photovoltaics.

15 The coil bodies of these inductive components are almost always thin-walled cylinders that support one or more windings of a shock coil, a transducer or a transformer.

It is known to manufacture the coil body or the isolation cylinder, for example, by the method

20 for injection or extrusion molding, the coil body being configured mostly as a hollow cylinder, into which, for example, magnetic cores can be inserted. However, wound coil bodies that are molded in the form of insulating cylinders are also known.

It is also known that the magnetic cores for shock coils are configured, for example, in the form of

25 column, and are composed of one or several core elements or core discs glued together and separated from each other by the so-called "air gaps", for example, in the form of intermediate layers made of insulating material. So far, core columns of this type were constructed, for example, from core discs with interleaved air gaps (which, as is known, are not air gaps, but intermediate layers of insulation) and glued at the same time to insert them into the coil body or wrap them as a column of

30 core with insulating material. The function of these air gaps is to configure the electromagnetic properties of the shock coils and optimize them so that the highest possible amount of magnetic energy is stored in the air gaps, however, the dispersion fields outside the air gaps or the inner sides of the windings. On the other hand, "the air gap" also serves to mechanically join the core parts or individual discs together, in particular to bridge the so-called

35 air gaps with adhesive coated discs.

This conventional procedure for the manufacture of magnetic core columns from many discs or core parts requires a lot of time and is very expensive. In addition, it is not easy to build aligned core columns and paste them at the same time. These core column constructions are limited or at least difficult

40 due to the tolerance of the disc diameters and thicknesses, the tolerances of the air gap discs that cannot really be implemented with sufficient accuracy, the dosage of the amount of adhesive, the thicknesses of the layers, the different viscosities of adhesives due to waiting times, different temperatures and humidity of the air. All these unstable factors and parameters disappear when weft half-shell housings are used.

45 The next expensive work step during conventional manufacturing of inductive components is to integrate the core columns into conventional bucket housings and manufacture mechanical supports for the core columns and the yokes. Finally, in order to adjust the inductance of inductive components, external devices and auxiliary means must generally be used, which delays and makes the cycles more expensive.

50 EP0848391A1 discloses in this regard a housing for the construction of magnetic core columns, separated by air gaps, for inductive components, which has interior cladding surfaces that delimit the interior space and in which several ribs or ribbed ribs are arranged. that penetrate radially into the interior space. The interior space is divided by nerves or highlights

55 ribbed in several chambers aligned with each other to accommodate core discs or core portions of the magnetic core column. Core discs or core parts are loose in the chambers and are not mechanically attached to each other. This results in non-optimal physical properties of inductive components, such as higher electrical losses, greater electrical capacitance to ground, leakage current problems and worse heat dissipation.

Presentation of the invention

The invention aims to configure an inductive component with magnetic cores so that this component or shock coil can be clearly manufactured in an easier and more economical way than in the 5 procedures existing so far, despite the division of the core into multiple parts

The objective is achieved according to the invention by means of an inductive component with the characteristics of claim 1 and by a process for the manufacture of such component with the characteristics of claim 8.

10 The central configuration for the construction of the inductive component is a housing with the so-called frame half-shells or a frame strip or frame slots and a frame encapsulation. The housing forms cameras to accommodate core disks or core parts that together form the magnetic core. By combining, for example, with a corresponding outer shell or a novel bowl housing, they can be assembled

15 two or more of these housings to form a complex inductive component.

The chambers are formed by ribs or ribbed ribs or nopae that are configured on the inner lining surfaces of the weft half-shells and that penetrate radially into the interior space,

or by means of grooves configured in the inner wall of the weft half-shells with intermediate layers. The nerves

20 or the ribbed ribs or the nopae or the intermediate layers define at least partially the necessary air gaps between the core discs or core parts.

Advantageous configurations and other features of the invention are described in the secondary claims.

25 New techniques and concepts are used according to the invention for the construction of the inductive component. Preferred embodiments of the invention are executed with the so-called interior structure encapsulation. This interior structure encapsulation makes it possible in various aspects to dispense with the usual coil packages so far or the partial encapsulation procedures, with manufacturing advantages, better physical properties of the shock coils, better properties, such as lower electrical losses ,

30 reduced electrical capacitance to ground, absence of leakage current problems, better heat dissipation of windings, also saving material and weight.

In the case of the aforementioned interior structure encapsulation, the differential volume between the chambers of the weft half-shells and the core disks or core parts and also of the intermediate spaces between the

35 outer core discs, as well as outer shells and yokes are filled with suitable encapsulation masses, for example, very fluid resins, and also with standard filling masses. In this regard, encapsulation masses with low coefficient of thermal expansion are used. The entry of the encapsulated masses into the cavities, which are to be filled, can be supported by the evacuation of the cavities.

40 The essential aspect of the innovation is, among others, that the minimum volumes of the interior space, mentioned above, are continuously configured, are sealed outwards, but open with respect to the atmosphere in the area of entry of the mass of encapsulated and are configured with small volume filler tanks at the opening point.

45 The advantages are obvious. In addition to minimizing the amount of material and manufacturing costs, reducing the amount of resin or filler mass and ensuring physical advantages, this technique also provides advantages over the volume, weight and arrangement of sinusoidal shock coils in inverters and also in all other applications.

50 In this way, the core columns and the intermediate glue spaces between the outer shells and the yokes are filled with encapsulated adhesive resin, the windings with their wiring being previously slid, as well as initial and final parts on the housing. The filling spaces between the core disks or core parts are predefined by forming the weft half-shells and the outer shells, taking into account the tolerances of the partial disks / cores.

55 When the interior spaces are filled with encapsulation masses almost always very fluid, preferably in a working step, the core discs and the yokes are well fixed and secured. The bonding process of the core parts and the yokes that was costly so far is eliminated. Before encapsulation it is possible to adjust the inductance value with adjusting screws on the outer housings or bucket housings.

In contrast to this, the inner structure encapsulation can also be carried out in two working steps, that is, the core columns are first encapsulated or injection molded and then the outer shells with yoke are fixed in a joint of interior structure composed of resin or filling masses. By means of this type of interior structure encapsulation technique they are obtained in relation to the discs of

5 core or core parts, yokes and outer shells inductive components or shock coils that are low-noise and have high stability, accuracy and quality.

The dissipation of the residual heat of the windings placed on the weft half-shells is general and efficient. The air, which absorbs waste heat, is usually in contact with the inverter's indoor air

10 corresponding or other electrical appliances. The circulation of mostly internal air from inverters or electrical appliances absorbs the low residual heat of the inductive component and evacuates it.

According to the invention, the thicknesses of the ribs or ribs ribbed in the weft half-shells, frame strips

or weft encapsulates are less than the thickness of the air gaps calculated between the core disks or the

15 core parts Accordingly, the core discs or core parts are located with a small overall clearance in the chambers of the weft half-shells. All the tolerances of the discs or core parts and the weft half-shells are equalized before filling without vacuum with very fluid resins, but also in vacuum with encapsulated masses of higher viscosity as a result of the possibility of adjustment existing from the point of constructive view.

In particular, the thickness of the ribs in this type of weft half-shells, frame strips or frame encapsulates may be different, depending on the design of the component.

Preferably, there are mostly ribs or ribs in the hollow bodies of the housing or also

25 slots that separate the central and outer chambers from each other, also with some wavy ribs connected to the outside or flexible nopas to adjust the core columns.

Due to the axial pressure exerted on the core discs or outer core parts by means of the yokes, the corrugated ribs, ribs, the nopas with a corresponding configuration or

30 also the intermediate layers in the grooves in the hollow body of the weft half-shells, as well as can be displaced axially and shear in case of greater tolerance compensations. This guarantees large bandwidths during the adjustment of the added measurements of the air gaps, for example, of an inductance or shock coil. The distances between the core discs or outer core parts can be adjusted to each other in general or the inductance value of the component can therefore be adjusted precisely.

35 In order to safely control the solicitations with axial forces, the outer housings are preferably provided with tightening elements of the notched groove and are thus fixed by force drag on the weft half-shells filled with core discs or partial cores. As already mentioned, adjustment possibilities are provided on the outer walls to be able to exert axial forces on the core discs

40 arranged in the weft half-shells and thus being able to compress the intermediate spaces between the core disks or outer core parts or also take them to the initial position, whereby the adjusted sum of the air gaps between the core disks or parts Core provides exactly the nominal inductances.

After adjusting the distances (air gaps) between the core disks or core parts it is encapsulated with

A very fluid resin or an encapsulation mass of higher viscosity and when hardened, the core discs are permanently fixed within the weft half-shells and remain fixed throughout the life of the shock coils.

Disc parts and / or core parts in the form of a parallelepiped can be used. In the first case, the hollow body

50 has a cylindrical shape, but also a parallelepiped or cube shape, the hollow body being able to present, for example, a cylindrical outer shape and a rectangular inner shape, that is, essentially rectangular.

In an unclaimed configuration, it can be provided that the hollow body is not composed of weft half-shells or frame strips, but of an overmoulded housing. In this case, the encapsulation mass is

55 poured or injected into a mold around the discs or partial cores that were fixed at predefined distances with pins or clamps. The encapsulated mass thus forms the housing and fills the air gaps between the core discs or core parts.

Likewise, it can be provided that the outer housings are arranged separately in injection molded weft columns in the form of a single piece. The outer housings can be fastened on the columns of axially divided weft helmets.

However, in a working step, two half-shells can also be manufactured with an horizontally divided outer shell 5, that is, they can be injection molded, sintered, laser configured or encapsulated.

According to the invention, the housing of the inductive component comprises so-called weft half-shells, frame strips, weft encapsulates having at least one elongated hollow body, on whose inner lining surfaces there are arranged several ribs and nodes that penetrate radially into the interior space or other configurations, for example, grooves, the partial interior spaces being subdivided by ribs, corrugated surfaces, axially flexible nopas or rigid and flexible intermediate layers, in some ways in some

or many cameras axially aligned with each other to accommodate core discs and core parts.

The hollow body of the housing is preferably composed of two axially divided weft half-shells,

15 each core disk or core part being separated from a core disk or adjacent core part by at least one arrangement of ribs or nodes located in a circle or other configurations, for example, grooves.

The weft half-shells are preferably constructed symmetrically, that is, inside the two

20 weft half-shells are formed, for example, semi-cylindrical, rectangular or differently shaped cavities, in which core discs or partial cores are placed in a manner necessary for the respective type of inductive component.

A hollow body assembled from, for example, two weft half-shells, forms several or many spaces

25 of partial weft, for example, cylindrical chambers and also other geometric configurations, for example, parallelepipeds or cubes that allow separations between core disks or core parts.

The discs or core parts are inserted into the chambers of the first frame half-shell and closed with the second frame half-shell. Therefore, stacking is unnecessary, in which, for example, the core disks are

30 have to glue each other disc by disk and the core parts, part by part.

After the core discs or partial cores are enclosed by the weft half-shells, the cavities can be filled with very fluid adhesive resin. Standard resins can also be used if the interior structure encapsulation is evacuated after filling with molding resin or other filler mass, by

35 example, polyurethane resin.

The above explanation refers to the first embodiments of the novel shock coils with weft half-shells.

40 In addition, another version of the shock coil or “family of shock coils” was developed with a housing technique based on the existing impact coils.

Instead of the two outer housings described above, a one-piece cuvette housing was developed which, as usual until now, houses, for example, two cores with windings and yokes and is partially encapsulated

45 or completely.

However, the cuvette housing, preferably of plastic, differs from the cuvette housings existing until now by the fact that it is not made of metal, but of plastic configurations of thin walls and molded cavities in a very tight way to windings and yokes.

50 This type of housing also optionally allows the incorporation of intermediate metal or ceramic surfaces, heat conductors, of a part of the periphery of the windings to form cooling elements or cooling surfaces of inverters.

55 These new versions of insulating cuvette differ little from the weft half-shell shock coils with two outer shells in relation to material consumption. Both embodiments require a clearly smaller amount of encapsulation mass compared to the metal bucket solutions available so far, because these new insulating bucket housings are molded in a manner that fits the windings and yokes, which is not possible in the case of metal buckets.

The invention is explained in detail by way of examples. Other features and advantages of the invention are derived from the sketches and drawings and the following descriptions.

Brief description of the drawings 5 They show:

Fig. 1, 1a, 1b plan view and a section through a weft half-shell; Fig. 2, 2a cuts through the weft half-shell with molded ribs in the half-shell case;

10 Fig. 2b keystone groove configuration; Fig. 2c circumferential grooves to connect the outer shell; Fig. 2d simple spindle groove configuration; Fig. 3, 3rd view, section of a weft semi-helmet equipped with core parts; Fig. 4 plan view of core column or pair of weft half-shells;

Fig. 4a section of a core column formed from weft half-shells; Fig. 5 side view of flexible (shear) nerves in the weft half-shell; Fig. 5a side view of large, rigid air gap nerves; Fig. 5b side view of air gaps with ribbed ribs, small, rigid; Fig. 5c isometric interior view of Figure 5b, weft half-shell;

20 Fig. 5d section, frame hull adjustment area, loose core discs; Fig. 5e section, frame hull adjustment area, adjusted core discs; Fig. 5f weft half-shells, large, rigid, and flexible wavy nerve; Fig. 5g compressible intermediate layer, core discs; Fig. 5h double weft semi-helmet with flexible hinge;

25 Fig. 5i double weft semi-helmet with flexible hinge; Fig. 5j isometric double weave helmet with flexible hinge; Fig. 5k isometric double weave helmet with flexible hinge; Fig. 6 coil side and side of an outer housing; Fig. 6 yoke side of an outer shell;

30 Fig. 6b plan view of the outer shell; Fig. 7 side view of the winding on the coil body; Fig. 7a plan view of the winding on the outer housing; Fig. 7b isometry with two coil bodies wound; Fig. 7c coil side of an outer housing;

35 Fig. 7d rear view of the outer shell; Fig. 7e plan view of coiled core columns, attached outer shell; Fig. 8 plan view of core columns; Fig. 8a core columns, on an outer side; Fig. 9 an individual winding;

40 Fig. 9a plan view of an individual winding; Fig. 10 stack of core columns with tubular wrap, without ribs; Fig. 11 plan view of figure 10; Fig. 12 housing with core column of core disks; Fig. 13 section through figure 12;

45 Fig. 14 square or rectangular injection molded core parts; Fig. 15 version of injection molded stack core column; Fig. 16 plan view of figure 14; Fig. 17 plan view of figure 15; Fig. 18 core column helmets without nerves, in plan view;

50 Fig. 19 side view of a weft semi-helmet without nerves; Fig. 19a plan view of a weft semi-helmet without nerves; Fig. 19b isometric view of the weft half-hatch with grooves; Fig. 19c isometric view of the assembled housing without ribs; Fig. 19d isometric view of the housing assembled with intermediate layers;

55 Fig. 20 weft half-frame with hole pattern; Fig. 21 core column strip in triangular arrangement of 120º; Fig. 22 core column strip according to figure 21, in side view; Fig. 23 core column strip as a spacer element with respect to the winding; Fig. 24 inductance adjustment in injection machine;

Fig. 25 shock coil assembly with weft hull, standard yokes; Fig. 26 yokes for large series version; Fig. 27 outer shell for large series version; Fig. 27a seal for interior encapsulation, version of core discs and yokes;

5 Fig. 28 exploded drawing version of shock coil and outer shell; Fig. 29 assembly version of shock coil and outer shell; Fig. 29a encapsulated section assembly of interior structure; Fig. 29b front side assembly; Fig. 29c three-phase current shock coil stack;

10 Fig. 30 frame shock coil with tray housing; Fig. 30a, 30b shock coil with bucket housing; Fig. 31, 31a core columns with winding, wired; Fig. 32 cuvette housing in side view; Fig. 32a tray housing in plan view;

Fig. 32b bucket housing in longitudinal section; Fig. 32c bucket housing front side; Fig. 32d cuvette housing, projecting area of steering column; and Fig. 32e cuvette housing, center, section.

Description of the preferred configurations of the invention

The following examples of realization of the invention refer to novel housings for the construction of shock coils, whose magnetic circuits are made, on the one hand, of very standardized soft magnetic materials, or ferrite materials, such as core disks and the yokes. On the other hand, the invention is

25 refers to the environment of the core columns of weft helmets, that is, the union of the core columns of weft helmets with the windings of the shock coils or of the transformers, or possible applications with different housings, which They are essentially reduced to two construction lines:

1. Core columns of weft half-shells with winding, yokes that can be held on the discs of

30 core, fastening screws on the bridges of the outer housings in the simplest embodiment for small quantities of parts and a serial embodiment for large quantities of parts, both embodiments with interior structure encapsulation for filling the gaps between discs of core or core parts and manufacturing the fixation for the stability of the entire shock coil.

35 2. Core columns of weft half-shells with winding, yokes that can be fastened on the core disks or core parts, also fastening screws on the front side, the yokes optimized with standard or magnetic flux in enveloping tray housings, in encapsulation with mirror finish, but with reduced encapsulation volume.

40 The fundamental idea, according to the invention, of "weft semicircle core columns" was extended in this way and supplemented with optimized yokes with magnetic flux, plastic tray housings and streamlined wiring and current connections. Future serial manufacturing procedures will be based respectively only on the integration of two plastic parts. This new, very simplified integration technique defines the entire structure of the shock coil, which allows manufacturing procedures

45 brand new.

Figures 1 and 1a, 1b show a plan view or a cut through a housing 1 with so-called weft half-shells 1a, 1b. Each weft half-shell 1a, 1b is configured in the form of a thin-walled semi-cylinder and has, among others, a continuous and axially flat notch or channel 2, see also Figure 18. On the left and right of the notch / channel 2 are arranged in pairs, for example, ribs or thin ribbed ribs 3 (or 3a in figures 5) that divide the interior space of the weft half-shell 1a into individual chambers 76. The individual chambers 76 are arranged one behind the other in Longitudinal direction of the weft half-shells in Figures 1a, 1b. Likewise, the ribs / ribs 3, 3a or air gap grooves are positioned on the inner periphery of the weft half-shell 1a, 1b, preferably in shape pairs, by

55 example, of circular segments.

Flange clamping of the so-called outer housings 10 are provided respectively at the end of the weft half-shells 1a, 1b circumferential grooves 5 or segmented grooves which are used, inter alia, to fix the outer housings 10 as described below: Figures 2 to 2c show cross-sections through weft half-shells 1a, 1b and the joint examples are shown in Figures 2b and 2c. Figure 2 shows the side view of the outer side of a weft half-shell 1a, 1b. The ribs / ribs 3, 3a are configured independently of their radial height preferably as ribs or rigid ribs 3a, figure 5b, or grooves, figure 19b, which are located

5 connected to the inner wall of the weave half-shell 1a, b.

Figure 2a shows a section through the weft half-shell 1a in the area of the rigid ribs 3. The ribs 3, 4 are separated from each other in each case by the notch or the channel 2 and are preferably configured in pairs. Figure 5c shows an isometric view of a weft half-helmet with rigid ribs 3 and ribs 4 or nops 10 4a that can be flexed until they are sheared, Figure 5c. The ribs or nodes 4, 4a, which can be flexed slightly in the axial direction, are preferably arranged in the respective outer parts of the weft half-shells 1a, 1b. Figures 19b, 19d or 5g show alternative configurations of weft half-shells with grooves in the interior surfaces. The total lengths of the weft half-shells 1a and 1b are smaller than the lengths of the core disks 9, aligned one behind the other, plus the sum of the 15 air gaps. That is, the front outer core discs or core portions 9 protrude slightly with a projection 38, 39 of a few millimeters beyond the closed weft half-shells 1a, 1b (Figures 5d, 5e). This is necessary to be able to exert a force 53, 54 (figures 5d, 5e) respectively on the outer core disks 9 or core parts and thus be able to adjust the positive / negative distance between the core disks and, therefore, the length of the core column, as well as to be able, on the other hand, on the

20 surfaces of the outer core discs or core parts of the yokes 17 or 40 (Figure 28) without empty spaces. Each weft half-shell 1a has on its axial sides a continuous spike 6 in Figure 2b, as well as a continuous groove 7, by which it can be attached to another weft half-shell 1b with an identical construction to form a cylindrical shell 1.

25 In Figures 4-5e, the nopas are loose (Figure 5d), the air gap 36 is large and is in a non-tensioned state, shown in Figure 5e in a tensioned state, in which the size of the air gaps has been reduced 37. The nopas 4a can be folded easily and without damage (figures 5e, position 35), because around the bases of the nopas are arranged respectively internal notches 34, figure 5c, which prevents shearing of the nopas during the displacement. This is also valid for weft half-shells with

30 frame slots, figure 19, position 89.

The difference between the diameter of the core discs 9 and the depth measurement of the notches beyond the inner diameter of the chamber in Figure 4a allows an axial elastic adjustment according to Figure 5e respectively, for example, between one or several discs of core 9 or its air gaps, figure 5e, which can no longer be adjusted later

35 of the package.

Figure 5g also shows, alternatively to the adjustment of the nopas, elastic intermediate layers, Figure 5g, positions 78, 79, 80, in the form of a thin plate that can be compressed and also brought to the initial position. This plate could be used in certain circumstances in addition to nerves 4 or nodes 4a

40 flexible if essentially large adjustments are to be made, which is not necessary in the case of standard shock coils.

Figures 3 and 3a show a view or a cut through a weft half-shell 1a with inserted core discs 9 as a magnetic core column. The weft half-shell 1a comprises ribs 3, 4 or ribs 45 ribs, nopas 4a, see figure 5 and following. In the cavities or frame chambers 3b between the ribs 3, 4 or nodes 4a, core parts are inserted, for example, in the form of core disks 9, the positive tolerance diameters of the core disks 9 being smaller than the Inner diameters of two weft half-shells assembled 1a, 1b or also of half-hull closed half-shells, figures 5h to 5k. At the ends of the weft half-shells respectively the inner diameter of the assembled half-shells 50 has been reduced, Figure 5c, position 57, that is, the two outer core discs are housed without clearance or under slight pressure on the half-shells. of frame 1a, 1b not encapsulated. Therefore, when the outer housings, figures 6, 7, 25 and 28, are mounted on the non-encapsulated core columns, the end portions of the hollow chambers of the weft half-shells are compressed without play, because the core disks 9 are rigid and are housed in the open chambers, figure 5c, position 57, which guarantees a good force drag connection between the

55 core columns and outer shells, figures 6, 7, 25, 28.

Moreover, the "thicknesses" or "heights" of the core discs 9 are slightly smaller than the minimum diameters and axial measurements of the chambers 76, that is, the distance between the ribs 3, the ribbed ribs 3a and the nopas 4.

After inserting the core parts or core discs 9 into the chambers 76 (Figure 1), between positions 3-3, 3-4, 4-4 or 3a-3a or 3a-4a and 4a-4a, the half-shell of frame 1a is closed with a second half-shell of frame 1b or, analogously to figures 5h or 5k, by a flexible hinge 52. This makes stacking operations unnecessary, in which the core discs / parts are to be stacked piece by piece and paste. The described technique of

The insertion of the core parts 9 into the weft half-shells 1a, b is more rational and precise than the stacking of core discs or individual core parts, even if the stacking technique is automatic or semi-automatic.

According to the invention, the work to assemble the core parts 9 is considerably reduced to the simple and brief insertion operations of the core parts 9 in the chambers (Figures 3a, 3b, 4, 4a) of the half-shell of

10 frame 1a and the adhesive bonding of the second frame half-shell 1b, figures 5d, 5e. Except for the eventual operation of gluing the pins 6 and the slots 7 of the weft half-shells 1a, 1b, no other manual or automated operations are required for the assembly of the frame helmets with the core parts.

Figure 4 shows, for example, the assembled configuration 1a, 1b which is composed of the half-frame half-shells 1a and 1b. Figure 4a shows the core column 1 assembled with core parts 9 inserted.

Figures 5, 5a-5g show in detail cross sections of the assembly of weft half-shells 1a and 1b (figure 19 and following). Each weft half-shell 1a, 1b comprises ribs 3 distributed in the inner periphery (figure 5a) or ribbed ribs 3a (figure 5b), as well as flexible ribs 4 (figure 5) or flexible nodes 4a (figure 5c)

20 forming the intermediate spaces, that is, the chambers 3b, to accommodate the core parts 9.

There is also the possibility of manufacturing weft half-shells with hinges, figures 5h to 5k. The two weft helmets, in a way a lower part and an upper part, are joined together by one of its longitudinal sides by a flexible hinge 52 and can be folded by this flexible hinge 52. In this case,

25 one side of the double weft half-shell (figure 5j) is equipped with core discs and the non-equipped half-shell half folds over the equipped half-shell.

The natural tightness of the joint made by means of the hinge of the envelope is advantageous. In addition, it is not necessary to perform manipulations or assembly adjustments (Figure 5i) in the second frame half-shell, because the

30 integrated flexible hinge 52 does not allow movement of the weft half-shells with each other.

Regardless of the versions according to the invention that are selected, be they the individual weft half-shells of Figure 1, the double weft helmets or the weft half-shells with slots of Figure 5 and following, all versions of half-shell embodiments frame can be attached to the so-called carcasas

35 exterior 10.

Figures 6 to 6b and 27 and the exploded drawing of Figure 28 show, for example, outer shells 10, 43 that can be attached to core columns of weft half-shells. These outer housings 10, 43 are composed, for example, of a base plate with two holes, fixing projections and, in the version of Figure 27,

In addition to a flange that is designed for specially molded yokes and for the housing of molding resin, Figure 28.

The base plate of the outer casing, figure 6a, b, P10, comprises holes 11 with bevelled 12 to be able to block the core columns by force drag and in a shear-resistant manner in the outer casing

45 10, 43. The diameters of the holes 11 with the beadings 12 are reduced with tightening screws 13 when the tightening screw 13 is tightened. The beadings 12 of the holes 11 of the outer housings in Figures 25, 28 engage in the grooves 5 of the core columns 1 and are clamped in the grooves 5 by means of clamping screws 13.

50 The remaining space, figure 6a, position 14, can be sealed with gaskets, figure 6, position 15, such that the joints between the housing 1, the outer housings 10 and the yokes 17 fastened in / next to the outer housing they are closed and when the cavities are filled there are no leaks that affect the encapsulation process.

After placing, for example, the windings on the pre-assembled housings 1, regardless of

55 its design, the outer housings, figures 6a, b, position 10, are pushed over the beading 12 at the ends of the core columns. When the clamping screws 13 are tightened in the outer shells 10 (figures 7c or 27), the outer shells 10 are held by force drag on the core columns.

Figure 9 shows an individual winding 16, such as that which is placed on the housing 1.

Figure 9a shows a plan view of an individual winding. Between the carcasses 1 with core columns, a junction 10 can be formed by a junction point 10 which can be further stabilized, for example, by automatic gluing with the structural encapsulation. The outer shells 10 provided with yoke 17 and the shells 1 attached thereto with core columns are filled with filler resin and / or adhesive resin of

5 Low viscosity after assembly. In this respect, the differential volume is filled, figure 29a, between the interior space of the half-shells of weft 1a, b, minus the sum of the volumes of the core parts 9 plus the bonding of the yoke.

The encapsulation mass flows through the axially sealed weft half-shells, Figure 29a, and covers the inner side 10 of the yoke 40 and the outer shell 10, passing through the individual core disks 9 to the filling space between the outer shell "Superior" 43 and yoke 40, where there is no board.

Simultaneously, the air pushed by the resin leaves the cavities of the housings 1 with windings 16 and the bonding and encapsulation spaces between the outer housings 10 and the yokes 17. A very fluid resin is generally used as the encapsulated mass of 15. molding, polyester or polyurethane, etc., and also standard resins.

Figures 4, 4a, 4b show the way in which the core discs 9 or core portions of a core column are inserted into the frame half-shell 1a. The core disks or core portions 9 generally have a small axial clearance in their respective chambers, because the ribs 3 or ribs 4 have a thinner configuration than the planned air gap between the disks or parts of core 9.

The tolerances of the core parts 9 are compensated without problems. The second weft half-shell 1b is closed by the housing half 1a filled with core pieces 9. Previously, an adhesive can be applied alternatively in the groove 7 or the spike 6 of the weft half-shells, although this is not required.

A connection is created with the outer housings 10, 51, for example, by means of cutting screws, figure 7d, position 18, in the bridge joints 19, the yokes being pressed against the core stacks in the housing 1. Through the bridge joints 19 the outer core discs 9 can be held, thus adjusting, for example, several

30 air gaps with flexible nopas 4, 4a (figure 5e).

After the yokes 17, 25, 28 are prestressed and the distances of the core disks 9 or core parts in the core stack can be adjusted, the hardening of the encapsulation mass can be started, figure 29. During the adjustment of the batteries nucleus can also be corrected at the same time previously, for example, "the contraction" of the mass of

35 encapsulated, since the difference between the mass in the first fluid state and in the hardened state afterwards is taken into account, figures 5d, e.

The advantages of weft half-shells 1a, 1b as a complete envelope with open outer shells, figures 25, 28, are, in addition to very simplified manufacturing, the delimitation of mounting errors, the filling of the 40 air gaps and the parallel flat bonding of the yokes that is possible at this time.

The fundamental idea of the simple construction of core columns and their environment with core discs or core parts and yokes is also maintained with variable and modified alternative manufacturing elements and procedures.

45 If, for example, it is desired to adjust the inductance of the core stack before injection molding or encapsulation, the frame strips 69, for example, can also be joined with supports arranged on the front side according to figures 21- 24. The strong application of the construction integrated by frame strips 69 and supports 70 with small wall thicknesses is sufficient to adjust the inductance value.

50 In such a way, an injection or cast mold in the form of frame strips 69 can be equipped with core discs 9 and the length of the core columns can be adjusted with the aid of yokes 71 (Figure 24) when the batteries are compressed core until the nominal inductance is reached. Only then is the injection molding process performed, for example, according to the core column, figure 12. An identification of the core column guarantees

55 that during the assembly of the shock coils the core columns, adjusted in each case, remain together until the final assembly.

A similar procedure is possible with the so-called core column strips, figures 22-24. That is, the core discs 9 or parts are fixed, for example, with three or four frame strips 69 by means of supports 70 before being inserted into an injection mold, figures 21, 23, and according to the described procedure they are adjusted, thus as they are injection molded or overmolded, figure 24.

Figures 26-32 show the conception of a shock coil, made for the manufacture in large series, in which the configurations of the usual individual parts have been replaced and perfected so far.

In an exploded drawing, figure 28 or figure 29a, a shock coil designed for large numbers of parts is shown. In order to create compact constructive forms, commercial yokes in the form of a parallelepiped are no longer used. Yokes were conceived instead of standardized yokes in the form of a parallelepiped

10 specifically molded according to the flow, figure 26, by means of different magnetic fluxes in the length of the yoke. That is, the cross-section with the maximum dimension, for example, is in the center of a yoke 40, because only here is all the magnetic flux found. All cross sections outside the central area of the yoke can be reduced by half, to the left / right of the center, or to smaller cross sections. That is, all the cross sections, which extend from the central area outwards, figure 26,

15 positions 65, 64, 63, approximate the real magnetic fluxes. This creates space to accommodate connections, contact devices, winding bridges and integrated base constructions of the shock coils, figures 27, 28.

It is also advantageous for the support side of these yokes to have stepped surfaces, figure 26. The surface

The flat yoke for the passage of the magnetic flux is advantageously configured only slightly "wider" than the diameter of the core discs. In the step of figure 26, connecting bridges, figure 31, wire connections 84 can be placed, which advantageously enables a minimized total volume and an inner insulation encapsulated with respect to the yoke. Thus, for example, up to 30% of material is saved in the yokes, while ensuring a better performance of the cross-sectional flow.

25 Likewise, to perform a complete interior encapsulation of a shock coil, Figure 28, that is, to create a fixed joint between core discs / core parts, outer shells and yokes, separately encapsulated initial parts, end parts, joints of the windings or contact pieces, all the fixings are grouped and integrated.

30 This is shown in the exploded drawing of Figure 28. The overall drawing of Figure 29 also shows how to reduce the volume and weight of a shock coil.

With the weft half-shells according to the invention, figures 5 to 5k, and the outer housings, figures 27, 29, are

35 achieve minimum capacitances, conditioned by the concept, between windings and ground, which is advantageous for application in inverters, because minimized capacitances generally reduce switching losses of semiconductors in inverters.

From the conception according to the invention a dielectric strength is not achieved so far, a

40 resistance against moisture, major leakage paths between windings and mechanical fastenings of the shock coils, which provides safety and stability, as well as very low noise shock coils, figures 25-31. The cracks of the adhesive between the core discs 9, figures 12, 14, 15, 24, 25-31, and core portions are almost excluded. However, if there is a crack in the adhesive between the core discs 9, this would have no consequence, because the weft half-shells hold the staples together stably.

45 core columns without interruptions. Figure 13 shows, alternatively to the preceding embodiments, a complete manufacturing mold that is integrated by a lower part 25 and an upper part 26. With the aid of this manufacturing mold 25, 26, molded steering columns can be completely manufactured by injection in one or several pieces or encapsulated or gelled under pressure. In the manufacturing mold, two or more fixing pins 27 are arranged on each lower part of the core respectively in the lower part 25 of the

50 manufacturing mold. This allows the core parts 9 to be fixed at the bottom 25 exactly at the defined distance (air gap). The upper part 26 of the manufacturing mold has a fixing pin 28 for each core disk or core part 9. Three fixing pins 27, 28 for each core part 9 are sufficient to precisely fix the entire arrangement of the core part 9 in the manufacturing mold before the encapsulation process.

55 At the beginning or at the end of the stacks of core disks or core parts 9 housings are found in the mold to enclose the core disks or to seal the ends of the core columns if individual core column encapsulation is performed . This does not happen if the core columns are provided with outer or integral housings, as explained below.

In another configuration of the invention according to FIG. 20, the arrangements of the pins in an injection or encapsulation mold disappear if, for example, weft half-shells 72 with a thin lining that is provided with holes are used. The pattern of holes in the weave half-shell 72

5 enables the free entry of the injection or encapsulated mass into the empty spaces between the core discs or core parts inserted in the weft half-shell, as well as the closing of the isolation cylinder part around the core discs or core parts.

With a small cost, core columns with frame strips 69 can be manufactured according to figures 21 to 24.

10 Two or three frame strips 69 are sufficient to precisely place the core discs or core portions 9 in an injection mold, Figure 24, and mold them by injection or encapsulate them as above. In this sense there are also two possibilities of realization. On the one hand, weft strips 69 are inserted in the supports 70, figure 23. On the other hand, weft strips 69 can also be inserted with an extreme fixation in simple half-shells of diameter, figure 21. In the first case according to figure 23 you can follow

15 reducing the low electrical capacitance to ground, conditioned by the concept, because the winding has only a small support surface in the frame strips 69. In the second case, the ground capacitance of the winding corresponds to the embodiments mentioned above.

All manufacturing molds equipped, as explained above, with core discs or core parts 9 according to

20 Figures 21-24 are filled with the injection or encapsulated mass, as in Figures 12 or 13. After the injection or encapsulated mass is hardened, a core column with a thin envelope is obtained. The core disks 9 are separated from each other by weft nops or disks and by air gaps filled with the injection molding mass. The mounting slots, made and provided at the ends, are used for fixing in an outer housing 10.

25 There is also the possibility of injection molding or encapsulating two core piles, manufactured in a manufacturing mold 25, 26, together with the configuration of an outer casing 10 and mounting the individual outer housings after the windings of the inductive component are placed.

30 As shown in Figures 14 to 17, non-round core parts 30, 31 can also be housed in the housings 1 integrated by the upper and lower parts. Figures 14-17 show, for example, the housing 1 containing core parts in the form of a parallelepiped or cube. In the case of this configuration, fastening bolts 32, figure 14, can be inserted in the sheaths of the core columns, figures 14, 15, which can be used to fix the outer housings, yokes or indicator plates or flanges.

35 Figures 16, 17 show configurations of a housing 1, injection molded or encapsulated in this manner, in which rectangular core portions 30, 31 are arranged. The core parts have different dimensions and thicknesses to be able to fill in the best possible cross sections of the core columns. In this regard, Figure 16 shows a cross section of a core column, in which one can

40 note that the entire cross section is formed by a square core portion 30 and four rectangular core portions 31 are connected in a rectangular manner, distributed on the sides.

Figure 17 shows in an analogous way a stepped core configuration, in which core portions 30, 31 are arranged, whose sheet width dimensions decrease in a differentiated manner and, therefore,

45 take advantage and fill the round cross-section of the housing 1. The core columns integrated by core parts 30, 31 are separated from each other by corresponding intermediate layers or ribbed ribs that then form the air gaps.

Figures 19, 19a, 19b, 19c and 19d show weft half-shells 1b in different views and the assembled housing 1

50 according to figures 19c and 19d. In order to fill the housing 1 with the encapsulated mass, notches / channels 2 are arranged in the inner wall, as in the case of weft half-shells 1a, 1b.

The above explanation refers to the different configurations of frame semicircle core columns with outer shell and inner encapsulation.

55 Instead of the outer housings of Figure 28, "integral" molded plastic bucket housings can also be used, starting from Fig. 30, which are connected to the metal shock coil housings so far, but that have more manufacturing functions or electrical functions than the previous housings. The plastic tray housings of Figures 30-32 are composed of almost rectangular housing parts in the yoke area. Rectangular shapes are transformed outside the yokes into semicircular parallel cuvettes, figure 32e. The adaptation of the plastic housing parts to the configuration of the shock coil saves encapsulation mass and provides greater mechanical stability.

5 This type of integral plastic cuvette housing also has small depressions, figure 32a, position 67, to accommodate direct or indirect welding joints between conductor profiles, wires, figure 31, position 84, or wiring bridges, figure 31 , position 85. Additionally, spacing and insulating projections are provided, figure 32a, positions 68, 76, for the wiring bridges. This configuration makes unnecessary the use of tape or flexible tube insulation in the areas of the conductor contacts.

10 The core columns of Figure 31 can be inserted into the core housings, Figure 32a, position 67, the yokes being inserted respectively "behind the housings", Figure 32e, position 76. Behind or in front of the supports are projections located insulators and spacers, figure 32a, which separate the wiring bridges from the windings, on the one hand, with respect to the winding and, on the other hand, with respect to the yokes, without measures of

15 usual isolation otherwise. After the following core columns with windings and yokes are inserted into the cuvette housings, figure 30, the shock coils can be adjusted using the adjustment screws before encapsulation. For this purpose, on the front sides, figure 30, position 81, small shafts with holes and tubular sleeves 88, connected below, which hide the screw head are provided. The adjustment screws are screwed on these axes and the exact inductance can be adjusted by covering the sleeve

20 tubular 88 for screw head the yoke potential.

External clamping devices, otherwise used, can be eliminated for stacking, fixing and adjusting cores or cores with yokes. Each individual shock coil can be adjusted very precisely directly with respect to its nominal value L, including the previous settings that take into account the

25 minimum shrinkage of the entire package.

During encapsulation, the encapsulation mass arrives through the channels between the weft half-shells and the weft discs inside the core columns and a compactly encapsulated shock coil component is obtained.

30 When the core discs are incorporated by encapsulation in the weft half-shells, the encapsulation mass does not have to completely fill the air gaps, as is the case in the outer shell version. An encapsulation, which extends from below to above the center line or to submerge the weft half-shell diameter, is sufficient to achieve the necessary compactibility of the core columns and thus eliminate vibration and

35 the noise.

List of reference numbers

1 housing

40 1st, 1st b Semi-frame 2 Groove / channel 3 Nerve (rigid) 3 High rib (rigid) 4 Flexible nerves

45 4th Nopa flexible 5 External housing slot 6, 6 ’Pin 7, 7’ Slot 9 Core disk or core part (core disk)

50 10 Outer shell 11 Hole, hole 12 Offset 13 Tightening screw 14 Empty space

55 15 Seal 16 Winding 17 Yoke 18 Cutting screw 19 Bridge joint

twenty

Fixing strip projection

twenty-one

Clamp diameter fixing

22

Slot diameter groove fixing

2. 3

Filling spaces for injection molding or encapsulated dough

245

Inductance adjustment yoke in injection molding or encapsulated installation

25

Manufacturing mold (bottom)

26

Manufacturing mold (top)

27

Fixing pin (bottom)

28

Fixing pin (upper part)

3010

Core part for core columns

31

Core part for core columns

32

Clamping screw

3. 4

Notch, nopa adjustment zone

35

 Flexible nopa

3615

Large, unstressed air gap

37

Adjusted air gap, reduced

38

Projection of core disc in weft hull, exterior

39

Projection of core disc in weft helmet, exterior, adjusted

40

 Yoke

4320

 Outer shell

Four. Five

Contact depression

46

Contact depression with end part of the winding and encapsulated wire

47

Conformation of the cable terminal, final part / initial part of the winding

48

Union final part of the winding and thread

4925

Winding connection and connection element

fifty

Electric union windings

51, 52

Flexible hinge

53

Force P1 core column not held

54

P2 force core column clamped and adjusted

5530

Semic-double, large folding angle

56

Double semi-small, small folding angle

57

Centering and clamping collar for outer core discs

58

Core column seal-outer shell-yoke-empty space

59

Resin filling

6035

Core resin filling

61

Resin filling outer shell

62

Flow in optimized cross sections of the yoke

63

Cross section

64

Cross section

6540

Cross section

67

Spacer molding depressions for connections

68

Distance channels for bridges

69

Frame strip

70

Support

7145

Yoke

72

Weft semi-perforated (perforated)

73

Plastic bucket housing

74

Yokes in the bucket housing

75

Weft semi-frames in the cuvette housing

7650

760 chamber protruding core column area in cuvette housing

78

 Intermediate layer

780

Insulating projections in integral housing

79

 Intermediate layer

790

Adjusting screw shaft, reinforced in the insulation housing

8055

 Intermediate layer

800

Adjusting screw hole in integral housings

81

Set screw

83

Raster hull channels for resin encapsulation

84

Wire connections

85 Junction bridge winding connections 86 Central axis shock coil 88 Tubular sleeve, electrical cover of clamping screws 89 Slots

Claims (18)

1. Inductive component with at least one housing (1), in which one or several columns of magnetic core are housed and on which at least one winding (16) is arranged, the housing (1) having 5 inner lining surfaces which delimit its interior space and in which several ribs or ribs or nopae are arranged (3; 3a; 4; 4a), which penetrate radially into the interior space, or grooves (89) with intermediate layers (78-80), the interior space being subdivided by the ribs or ribs or ribs (3; 3a; 4; 4a) or the grooves (89) with intermediate layers (78-80) in several chambers (76) aligned with each other to accommodate core discs or core parts (9; 31, 31) of the magnetic core column, characterized in that the disks of 10 core or core parts (9; 30, 31) are fixed immovably by means of the encapsulated mass poured into the chambers (76), an interior structure encapsulation being provided, in which the differential volume between the chambers and The volume of the disks or core parts are filled with encapsulation mass. 2. Inductive component according to claim 1, characterized in that each core disk or part The core 15 (9; 30, 31) is separated from a core disk or part of the adjacent core by at least one rib or rib rib or nopas (3; 3a; 4; 4a) or a groove (89) with intermediate layer (78-80), and this rib or ribbed rib (3; 3a; 4; 4a) or the intermediate layer manufactures or configures a part of a predefined air gap between adjacent core parts (9; 30, 31).

3. Inductive component according to one of claims 1 or 2, characterized in that the thickness of the ribs or ribs or ribs (3; 3a; 4; 4a) or intermediate layers (78-80) is preferably smaller than the thickness of the predefined air gaps between core discs or core parts (9, 30, 31).

Inductive component according to one of claims 1 to 3, characterized in that both rigid ribs or ribs (3, 3a) and nerves or nopas (4, 4a) are present which can be additionally bent in the axial direction and are also flexible axially

5. Inductive component according to one of claims 1 to 4, characterized in that the chambers 30 individual (76) are joined together by at least two notches or channels (2) running through the wall of the housing (1) in axial direction. 6. Inductive component according to one of claims 1 to 5, characterized in that in the housing ends (1) are provided with devices and slots (5) for fixing outer housings (10). 35

7.

Inductive component according to one of claims 1 to 6, characterized in that the outer housings (10) have circular and beadless housings for the grooves (5) of the housing (1).

8.

Procedure for manufacturing an inductive component according to one or more of the

40 claims 1 to 7, characterized in that the interior spaces, continuously connected, of assembled components, comprising a housing (1) assembled from weft half-shells, a first outer shell (10), yokes (17), columns of core and a second outer shell, are molded with resin encapsulates or encapsulated masses, by which the magnetic circuits composed of the core disks or core parts (9, 30, 31), the yokes are electrically and mechanically fixed (17), the enclosure (1), the 45 outer housings (10) and bridge joints (19) and are configured in a non-adjustable manner during the life of the inductive component. 9. Method according to claim 8, characterized in that the filling resins or the masses of encapsulated for an interior structure encapsulation are introduced through channels distributed separately from respective fastening adjustments of the core columns to the inner sides of the housing (1) and the outer diameter of the core discs (9), passing through resin passage points, and because the inner encapsulation is performed depending on the position from an outer shell (10), passing through the core columns, to the other outer casing (10) and the yokes (17) as an encapsulation of the internal structure of the shock coil.

10.

Method according to one of claims 8 or 9, characterized in that the internal structure encapsulation of the component is injected or encapsulated within an interior structure encapsulation or interior structure core columns or is divided into adaptive partial packages of individual core columns or with yoke encapsulation.

eleven.

Method according to one of claims 8 to 10, characterized in that the winding contact joints are encapsulated simultaneously with the inner structure encapsulation in separate depressions of the outer housings (10).

Method according to one of claims 8 to 11, characterized in that there are encapsulation points and because from the encapsulation points there are empty spaces and configurations between yokes. (17) and outer shell (10), in which the encapsulation mass can be distributed without difficulty and after hardening it stably joins the core columns, the outer shell (10) and the yokes (17). Method according to one of claims 8 to 12, characterized in that in the outer housings (10) there are encapsulation surfaces and resin bonding configurations are provided therein, for example, precise nopa surfaces manufactured using the technique of injection between yokes (17) and outer housings (10), in which the encapsulation mass accumulates which, after hardening, joins the core columns, the outer shell and the yokes by force drag. 14. Procedure according to one of the configurations 8 to 13, characterized in that transverse encapsulation surfaces are present in the outer housings (10) and resin bonding configurations, interlaced by the casting technique, between the yokes are provided therein ( 17) and the outer shells (10), which are located approximately in the center between the core columns, the outer shell 20 (10), the yokes (17) and base surfaces positioned at the outer corners and their fixing holes. 15. Method according to claim 14, characterized in that in addition to the transverse encapsulation surfaces of the outer housings (10) with the resin bonding configurations, interlaced by the casting technique, between the yokes and the outer housings additionally arranged surfaces 25 of support that allow the simple and multiple stacking of several inductive components. 16. Inductive component according to claims 1 to 4, characterized in that the individual chambers (76) are connected to each other by at least two semi-circular or approximately semicircular or trapezoidal notches or channels (2) running in the axial direction on the wall of the housing (1) and 30 because these core columns with winding, wiring and connections are arranged in a plastic tray housing (73). 17. Inductive component according to claim 16, characterized in that the plastic cuvette housing (73) is closely adapted to the outer contours of the inductive components and contains 35 hollow areas and projecting areas and because the housing (1) with core and winding discs is housed in integrated projecting areas. 18. Inductive component according to one of claims 16 or 17, characterized in that the housing Plastic tray (73) additionally contains open and protruding depressions that separate the points of direct or indirect welding and the wiring bridges with respect to the winding and the yokes. 19. Inductive component according to one of claims 16 to 18, characterized in that the plastic tray housing (73) contains, in addition to the integrated projecting areas, open and protruding depressions that separate the direct or indirect welding points and the bridges of wiring, on the one hand, respect 45 to the winding and, on the other hand, with respect to the yokes, and also contains hollow areas that, otherwise, empty the volume of accumulated resin. 20. Inductive component according to one of claims 16 to 19, characterized in that the plastic cuvette housing (73) has, similarly to the outer housings, screw adjustments on the sides 50 front, the screw settings being covered with the help of a potential technique by means of tubular sleeves that connect to the threaded shafts. 21. Inductive component according to one of claims 16 to 20, characterized in that the plastic cuvette housing (73) with the inductive components inserted is encapsulated in such a way that the level 55 of resin can extend slightly above the central axis until it is submerged above the core columns and because only parts of the windings protrude from the encapsulation. 22. Inductive component according to claims 16 to 21, characterized in that yokes (40) are provided which essentially have in the central part between the core columns the entire cross-section calculated, also oversized, and because the width and thickness of the section Transverse yoke are reduced by steps or in a trapezoidal structure and in the area of bridges and connections there are notches in the yoke.