Passive electrical structural element

Abstract

The invention relates to a passive electrical component for attenuating common-mode and differential-mode disturbances on at least two electrical lines leading to the component, having two annular cores, at least two windings being arranged on each annular core, the two windings on the first annular core being wound and / or interconnected in such a way that the two windings on the second annular core are wound and / or interconnected. The windings are wound and / or interconnected on the second annular core in such a way that a high attenuation of common-mode signals on the electrical line is achieved, and wherein the windings on the second annular core are wound and / or interconnected in such a way that a high attenuation of differential-mode disturbances on the electrical line is achieved.

Description

Technical Field

[0001] The invention relates to a passive electrical structural element. Background Art

[0002] A disconnecting element for a ring-core choke is known from German laid-open patent application DE 10 201 206 171 A1. The disconnecting element is constructed in two parts, and the first part can be snapped into the second part.

[0003] A common mode choke is known from Japanese patent abstract JP 0306256A.

[0004] Another common-mode choke is known from US publication US 2008 / 0129438 A1. Summary of the invention

[0005] The invention is intended to improve passive electrical components.

[0006] According to the invention, for this purpose a passive electrotechnical component is provided having the features of claim 1. Advantageous developments of the invention are mentioned in the dependent claims.

[0007] The passive electrical component according to the invention is provided for attenuating common-mode and differential-mode interference on at least two electrical lines leading to the component and has two annular cores, wherein at least two windings are arranged on each annular core. The two windings on the first annular core are wound and / or interconnected in such a way that a high attenuation of common-mode signals on the electrical line is achieved. The two windings on the second annular core are wound and / or interconnected in such a way that a high attenuation of differential-mode interference on the electrical line is achieved.

[0008] Common mode interference refers to interference with substantially the same signal level on at least two lines, through which useful signals are also conducted. Therefore, common mode interference cannot be measured between these two lines. In addition, differential mode interference is known. Differential mode interference has at least two lines (on which useful signals are also conducted) and different voltage levels. Therefore, differential mode interference can be measured between two lines that also conduct useful signals. Not only common mode interference but also differential mode interference affects the quality and availability of useful signals. The passive electrical structural element according to the present invention enables the simultaneous attenuation of differential mode and common mode interference. The electrical structural element according to the present invention combines a common mode choke with a differential mode choke. The common mode choke has a first annular core on which two windings are arranged. The differential mode choke has a second annular core on which two windings are also arranged. The windings on the first annular core of the common mode choke are wound and / or interconnected so that the magnetic flux caused by the common mode interference on different lines and thus on different windings is added in the annular core, thereby attenuating the common mode interference. On the first annular core, the magnetic fluxes generated by the useful signal cancel each other out, so that practically no attenuation of the useful signal is caused. In the second annular core of the differential mode choke, the differential mode interferences on different lines and thus on different windings generate magnetic fluxes that add to each other. This attenuates the differential mode interference at the second annular core of the differential mode choke. The material of the second annular core is selected so that it reaches saturation later in order to avoid saturation of the second annular core during normal operation. The inductance of the differential mode choke must be selected so that the useful signal is not attenuated too much, but only the differential mode interference is attenuated. This is possible because the differential mode interference and the useful signal are in different frequency ranges.

[0009] In a development of the invention, the first annular core is formed from ferrite, in particular manganese-zinc ferrite.

[0010] This makes it possible to achieve high common-mode attenuation in the common-mode choke.

[0011] In a development of the invention, the second annular core is formed from iron, in particular iron powder.

[0012] The ring core made of iron or iron powder has a high saturation. This makes it possible to avoid saturation of the differential mode choke in normal operation, so that the inductance is high enough to attenuate differential mode interference signals.

[0013] In a development of the invention, the two annular cores are arranged on a common base.

[0014] This results in a very compact arrangement.

[0015] In a development of the invention, the two annular cores are parallel to one another and are arranged such that their through openings are aligned.

[0016] This also results in a very compact and space-saving arrangement.

[0017] In a development of the invention, the two toroidal cores have identical geometrical dimensions, the diameter and material of the winding wires for all windings are identical, and / or the number of turns of all windings is identical.

[0018] In this way, the passive electrical component according to the invention can be produced cost-effectively in large quantities in an automated manner.

[0019] In a further development of the invention, the passive electrical structural element comprises two annular cores and a base, the annular cores being arranged on the base, wherein two windings separated from each other in space are arranged on each annular core, so that on each annular core, a first winding is arranged on a first angular region of the annular core and a second winding is arranged on a second angular region of the annular core, wherein the first angular region and the second angular region are different from each other and do not overlap, wherein a retaining and separating element is provided, which is connected to the base on the one hand and engages in the inner space of each annular core on the other hand, wherein the retaining and separating element is constructed as a single piece, wherein the retaining and separating element has two separate parts. A separation section, wherein the first separation section abuts at least two contact locations spaced apart from each other on the inner circumference of the first annular core, thereby separating the first angular region on the first annular core for the first winding and the second angular region on the first annular core for the second winding from each other on the inner circumference of the first annular core, and wherein the second separation section abuts at least two contact locations spaced apart from each other on the inner circumference of the second annular core, thereby separating the first angular region on the second annular core for the first winding and the second angular region on the second annular core for the second winding from each other on the inner circumference of the second annular core.

[0020] By means of a single retaining and separating element, not only can both annular cores be held in place on the base, but the two windings on the first annular core can also be separated from one another. Furthermore, the two windings on the second annular core can also be separated from one another by the retaining and separating element. The passive electrical component according to the invention is therefore also suitable for network applications with a voltage of, for example, 250 V. This is because, by separating the two windings on the first annular core and separating the two windings on the second annular core, a short circuit between the two windings on the first annular core and the two windings on the second annular core is reliably avoided. This also applies if the component is subjected to strong accelerations or vibrations.

[0021] In an improved version of the present invention, the two annular cores are arranged parallel to each other, wherein a contact section of the retaining and separating element is arranged between a first side surface of the first annular core and a second side surface of the second annular core facing the first side surface of the first annular core, and wherein the first side surface of the first annular core and the second side surface of the second annular core are in contact with the contact section.

[0022] The two annular cores can thus be held at a precisely defined distance from one another by means of the retaining and separating element, since both the first annular core and also the second annular core rest against the resting section of the retaining and separating element.

[0023] In a development of the invention, the retaining and separating element is designed to be plate-shaped.

[0024] In this way, the retaining and separating element can be produced cost-effectively and the elastic properties of the retaining and separating element can be determined by simple cutouts or recesses in the retaining and separating element.

[0025] In a development of the invention, at least a separating section of the holding and separating element is designed to be elastically deformable.

[0026] For example, in this way, the separation segment can be pressed and introduced into the annular core. After release, the separation segment then springs open again and thus rests firmly on the first and second contact points at the inner circumference of the annular core. For example, the separation segment can be clamped into the interior space of the annular core.

[0027] In a development of the invention, the separating sections are each provided with at least one cutout which extends from a boundary of the holding and separating element into the separating section.

[0028] In this way, depending on the length of the incision, the elasticity of the separation section can be adjusted.

[0029] In a development of the invention, the two separating sections are connected to one another and the elongated recess / through-hole extends from the first separating section into the second separating section.

[0030] Likewise, in this way, the elastic deformability of the two separation sections can be adjusted.

[0031] In a development of the invention, each separating section is provided with two cutouts which extend straightly from a boundary of the separating section toward the opposite separating section into the separating section, and the elongated recess / through-hole is arranged parallel to the two cutouts.

[0032] In this way, two resilient latching arms are formed on each separation section, which initially spring in when pushed into the interior of the annular core and can spring open again after reaching the intended end position.

[0033] In a development of the invention, the free ends of the separation sections are each provided with at least one latching nose in order to engage behind a side surface of the respective annular core.

[0034] In this way, the retaining and separating element can be snapped into the inner circumference of the annular core.

[0035] In a further development of the invention, the free end of each separating section is provided with two oppositely disposed latching noses in order to engage behind the side faces of the respective annular core at two oppositely disposed locations.

[0036] In this way, each separating section for introduction into the annular core can be simply pressed together to such an extent that the distance between two oppositely disposed latching noses is slightly smaller than the inner diameter of the annular core. After insertion and when the latching noses have completely traversed the interior of the annular core, the latching noses can spring open radially outwards again and thereby securely fix the separating section in the annular core.

[0037] In a development of the invention, the retaining and separating element is inserted with a foot section into a recess of the base.

[0038] As a result, the holding and separating element can be fastened to the base in a very simple manner.

[0039] In a development of the invention, the holding section is designed to be elastically deformable.

[0040] The holding and separating element can thus be fastened to the base in a very simple and reversible manner. For example, two annular cores are latched onto the separating section of the holding and separating element in the finished wound state, and then the holding and separating element is fastened to the base with its foot section. This can be done accordingly without tools and, if necessary, fully automatically.

[0041] In a development of the invention, the holding section is provided with at least one cutout which extends from a boundary of the holding and separating element into the holding section.

[0042] In this way, elastic deformability of the holding section can be ensured, in particular in the case of a plate-shaped holding and separating element.

[0043] In a development of the invention, the retaining and separating element is designed as a plastic injection-molded part.

[0044] In this way, cost-effective mass production can be achieved without problems. The plastic used should have the desired electrical insulation properties.

[0045] In a development of the invention, the base is provided with cutouts extending from the side surfaces of the base in order to guide the winding wire to the underside of the base.

[0046] In this way, the winding wire does not have to protrude beyond the contour of the base. As a result, the handling of the passive structural element according to the invention is simplified and in particular the winding wire is arranged to be protected.

[0047] In a further development of the invention, the underside of the base facing away from the annular core is provided with contact surfaces or contact pins.

[0048] For example, the underside of the base is provided with contact surfaces and is configured as an SMD component. The winding wire is then guided to the contact surfaces and electrically connected thereto. Alternatively, contact pins can also be provided at the underside of the base, which are then also electrically connected to the winding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Other features and advantages of the present invention are derived from the claims and the following description of preferred embodiments of the present invention in conjunction with the accompanying drawings. In the drawings:

[0050] Figure 1 shows a schematic electrical structure of a passive structural element according to the present invention,

[0051] Figure 2 shows a view of a passive structural element according to the invention from obliquely above,

[0052] Figure 3 Shows Figure 2 A first cross-sectional view of a structural element,

[0053] Figure 4 Shows Figure 2 A second cross-sectional view of a structural element,

[0054] Figure 5 Shows Figure 2 A view from the oblique front of the holding and separating element of the passive structural element according to the invention,

[0055] Figure 6 Shows Figure 5 A front view of the holding and separating elements, and

[0056] Figure 7 Shown from below Figure 2 View of passive electrical structural components. DETAILED DESCRIPTION

[0057] Figure 1 The schematic electrical structure of the passive component according to the present invention is shown. The component according to the present invention has a common mode choke CMC (Common Mode Choke) and a differential mode choke DMC (Differential Mode Choke). The common mode choke CMC is provided to attenuate the common mode signal on the electrical lines 1, 2 leading to the passive component 10 of the present invention. These two lines can then be further guided at the connection parts 3, 4.

[0058] Common-mode interference on the two lines 1, 2 refers to a signal having substantially the same voltage on the two lines 1, 2. Common-mode interference occurs, for example, because the two lines 1, 2 are each considered to act as an antenna. Common-mode interference on lines 1, 2 cannot be confirmed by measuring between the two lines 2, because they have substantially the same voltage or the same potential on both lines.

[0059] The common mode choke CMC has a schematically shown annular core 12 and a first winding 14 and a second winding 16 on the first annular core 12. The two windings 14, 16 are wound on the annular core 12 in such a way that the magnetic flux caused by the common mode interference on the line 1 in the first annular core 12 and the magnetic flux caused by the common mode interference on the line 2 in the first annular core 12 are added. The electrical energy of the common mode interference is thereby converted into magnetic energy and then attenuated in the first annular core 12. The first annular core 12 is made of ferrite. Manganese-zinc ferrite has proven to be advantageous within the framework of the present invention.

[0060] The two windings 14, 16 on the first toroidal core 12 have the same number of turns and are also made of the same wire material with the same thickness and the same ohmic resistance. The two windings 14, 16 are wound on the toroidal core 12 in the same winding direction, so that for common mode signals, the magnetic flux generated by the two windings 14, 16 is added in the toroidal core 12.

[0061] Alternatively, the two windings 14, 16 on the first toroidal core 12 can also have different winding directions. In this case, however, the common mode choke CMC must then be connected to the two lines 1, 2 in a different manner in order to again achieve the addition of the magnetic fluxes generated by the common mode interference on the two lines 1, 2 in the first toroidal core 12. This can occur, for example, by not connecting line 1 to the common mode choke CMC in the first toroidal core 12. Figure 1 The upper left connection is connected to the common mode choke CMC. Figure 1 The connection part in the upper right center.

[0062] If a useful signal is transmitted on the two lines 1, 2, the useful signal has a potential difference between the two lines 1, 2. Therefore, the useful signal can be measured between the two lines 1, 2. If the useful signal reaches the common mode choke CMC via the two lines 1, 2 at this time, the magnetic fluxes of the magnetic fluxes generated by the useful signal in the two windings 14, 16 cancel each other. Therefore, the useful signal is not actually attenuated by the common mode choke CMC.

[0063] The component 10 according to the invention also has a differential mode choke DMC (Differential Mode Choke). The differential mode choke DMC has a second toroidal core 18, a first winding 20 on the second toroidal core 18 and a second winding 22 on the second toroidal core 18. The windings 20, 22 are wound on the second toroidal core 18 in the same manner as the two windings 14, 16 on the first toroidal core 12. However, in order to achieve the effect of the differential mode choke DMC, the output end (at the Figure 1 The connection point is placed in the upper right corner) and Figure 1 The lower right output end of the common mode choke CMC is connected to the connection point at the upper right side of the differential mode choke DMC. The lower right output end of the common mode choke CMC is connected to the lower left connection portion of the common mode choke DMC.

[0064] In other words, the signal passing through the common mode choke CMC is conducted in the opposite direction through the first winding 20 on the second toroidal core 18, while the signal from the common mode choke CMC is conducted in the same direction as in the common mode choke CMC through the second winding 22 of the differential mode choke DMC. This causes the magnetic flux of the differential mode signal conducted through the first winding 20 and the second winding 22 on the second toroidal core 18 to be added to the second toroidal core 18. The differential mode interference on the two lines in the differential mode choke DMC is thereby attenuated.

[0065] Signals with a potential difference between the two lines 1, 2 are called differential mode interference. Since this is also the case for the useful signals on the two lines 1, 2, the differential mode choke DMC must be dimensioned in such a way that it is mainly the differential mode interference that is attenuated, rather than the useful signal. This can be achieved by appropriately dimensioning the inductance of the two windings 20, 22 on the second toroidal core 18, since the differential mode interference usually has a different frequency than the useful signal. Since the second toroidal core 18 is made of iron, in particular iron powder, the material of the second toroidal core 18 only reaches saturation in the case of large magnetic fluxes. As a result, saturation of the second toroidal core 18 in normal operation can be avoided, so that the inductance is large enough to attenuate the differential mode interference.

[0066] Two lines 3 , 4 lead out of the component 10 according to the invention. On these two lines 3 , 4 , substantially only useful signals are present, since common-mode interference is attenuated in the common-mode choke CMC and differential-mode interference is attenuated in the differential-mode choke DMC.

[0067] The two windings 20, 22 on the second annular core 18 have the same number of turns and consist of the same wire material with the same thickness and the same ohmic resistance. In the component 10 according to the invention, the windings 14, 16 on the first annular core 12 and the windings 20, 22 on the second annular core 18 consist of the same winding wire material with the same diameter and the same ohmic resistance and also have the same number of turns.

[0068] As will be explained below, the windings 14, 16 on the first annular core 12 and the windings 20, 22 on the second annular core 18 are arranged spatially separated from each other on the first annular core 12 or the second annular core 18. The component 10 according to the invention is therefore also very suitable for network applications with a voltage of, for example, 250 V. This is achieved in that the first winding 14 is wound on the first annular core 12 at an angular region different from that of the second winding 16. The first winding 20 on the second annular core 18 is wound on the second annular core 18 at an angular region different from that of the second winding 22. The different angular regions do not overlap.

[0069] In order to ensure the spatial and electrical separation of the windings 14 , 16 on the first annular core 12 and the windings 20 , 22 on the second annular core 18 , holding and separating elements are used, which are explained in more detail below.

[0070] With the component 10 according to the invention, a passive electrical component is provided, with which both common-mode interference and differential-mode interference can be attenuated.

[0071] Figure 2 The passive component 10 according to the invention is shown in a view obliquely from above.

[0072] The passive component 10 according to the present invention has a common mode choke CMC and a differential mode choke DMC. The common mode choke CMC and the differential mode choke DMC are arranged side by side on a base 24. The base 24 is rectangularly configured in the form of a thick plate. The base 24 is provided with a plurality of cutouts 26 at its side edges, through which the winding wires are respectively guided to the underside of the base 24. Figure 2 A plurality of contact pins 28 are arranged on the lower side hidden in the middle, and these contact pins are connected to the winding wires respectively, as shown in FIG. Figure 7 .

[0073] The common mode choke CMC has a first annular core 12, which in the embodiment shown is composed of ferrite. In the embodiment shown, the first annular core 12 is composed of manganese-zinc ferrite. A first winding 14 and a second winding 16 are wound on the first annular core 12. The first winding 14 and the second winding 16 are separated from each other in that they are wound on different angular regions of the first annular core 12, wherein these angular regions do not overlap.

[0074] The differential mode choke DMC has a second annular core 18, which is formed of iron, in the embodiment shown, of iron powder. The second annular core 18 has the same geometric dimensions as the first annular core 12. The two annular cores 12, 18 are arranged on the base 24 so that their center axes are arranged in alignment with each other.

[0075] The first winding 20 and the second winding 22 are wound around the second annular core 18 of the differential mode choke DMC. The first winding 20 and the second winding 22 are wound around the second annular core 18 at different angular regions, wherein these angular regions do not overlap.

[0076] By winding over different angular regions, the first winding 14 and the second winding 16 on the first annular core 12 are spatially separated from each other, and the first coil 20 and the second coil 22 on the second annular core 18 are also spatially separated from each other. In order to prevent the wires of the first winding 14 and the second winding 16 on the first annular core 12 and the wires of the first winding 20 and the second winding 22 on the second annular core 18 from contacting each other, a retaining and separating element 30 is additionally provided. The retaining and separating element 30 extends both in the interior of the first annular core 12 and in the interior of the second annular core 18 and abuts at two opposite contact locations on the inner circumference of the first annular core 12 and at two opposite contact locations on the inner circumference of the second annular core 18. Even if the component 10 according to the invention is subjected to high acceleration or vibration, for example when used in a vehicle, the windings 14, 16, 20, 22 cannot slip on the respective annular cores 12, 18 to such an extent that the wires of different windings contact each other. The passive component 10 is therefore also suitable for use in power supply systems having a voltage of, for example, 250 V or higher.

[0077] The retaining and separating element 30 also holds the two annular cores 12 , 18 in position relative to one another and also relative to the base 24 . This will be explained further below.

[0078] Figure 3 A cross-sectional view of a component 10 according to the invention is shown. Figure 2 In the embodiment, the cutting plane extends between the first annular core 12 and the second annular core 18, so that when observing the Figure 3 In this section plane, only the first annular core 12 with the first winding 14 and the second winding 16 can still be seen. The holding and separating element 30 is shown in section. The holding section 32 of the holding and separating element 30 is arranged in a blind hole in the base 24. The holding section 32 is clamped into the blind hole 34 in the base.

[0079] exist Figure 3 In the view of FIG. 2 , two contact pins 28 can be seen on the underside of the base 24 , which are connected to the winding wires.

[0080] Figure 4 Another cross-sectional view of a component 10 according to the invention is shown, wherein Figure 4 The cutting plane in the view of FIG. 1 includes the central axes of the first annular core 12 and the second annular core 18. Figure 4 The first annular core 12 , the second annular core 18 and the base 24 can be seen in the sectional view of , and the holding and separating element 30 is cut through in the middle parallel to the side surfaces thereof.

[0081] The holding section 32 of the holding and separating element 30 has already been explained, which is clamped in the blind hole 34 of the base 24. For this purpose, the holding section 32 is designed in a fork shape and has two cutouts. Figure 4 The two sections arranged on the left or right in the recess 33 can thus be elastically deformed inwards by a certain distance. This achieves a clamping effect in the recess 34. Within the scope of the invention, the holding section 32 can of course also be glued into the recess 34 or welded in a suitable manner to the wall of the recess 33. The holding and separating element 30 can be designed as a plastic injection molded part.

[0082] exist Figure 4 It can be further seen in FIG. 1 that the retaining and separating element has a T-shaped contact section 36. The first annular core 12 or the second annular core 18 contacts the two end sides of the crossbeam of the contact section 36. Thus, the two annular cores 12, 18 are kept at a defined distance from each other by means of the contact section 36.

[0083] The first separating section 38 of the holding and separating element extends into the interior of the first annular core 12. The second separating section 40 of the holding and separating element 30 extends into the interior of the second annular core 18. Each of the separating sections 38, 40 is elastically deformable such that Figure 4 In the illustration of , the separation section 38 can be pressed a distance from top to bottom, and the separation section 40 can also be pressed a distance from top to bottom.

[0084] from Figure 4 It can be seen that in the region of the separation section 38, the upper latching arm 42 abuts against the inner circumference of the first annular core 12, and the lower latching arm 44 also abuts against the inner circumference of the annular core 12. The latching arm 42 has a Figure 4 A latching nose 46 is formed in the middle and extends upwardly away from the base. Figure 4 The locking arm 44 at the bottom has a direction toward the base 24 (at Figure 4If the separation section 38 is pushed into the inner circumference of the first annular core 12, the two latching arms 42, 44 are first moved toward each other for a certain distance until the latching noses 46, 48 abut against opposite contact points on the inner circumference of the first annular core 12. Then, the separation section 38 is pushed into the interior of the first annular core 12 parallel to the center axis thereof until the latching noses 46, 48 leave the interior of the first annular core 12 again and move radially outward. Figure 4 As a result, the latching arms 42 , 44 snap radially outwards and the annular core 12 is then fixed relative to the retaining and separating element 30 . Figure 4 This is because Figure 4 The annular core 12 in the middle cannot move to the left because such movement is blocked by the latching noses 46, 48. The first annular core 12 also cannot move to the left. Figure 4 The retaining element 30 is prevented from moving to the right in this direction because it is prevented from moving in this direction by the contact section 36 of the retaining and separating element 30 .

[0085] Likewise, the separation section 40 is moved into the interior space of the second annular core 18 until it reaches Figure 4 The separation section 40 is constructed in the same manner as the separation section 38. The second annular core 18 is located relative to Figure 4 The retaining and separating element is held in its position by the latching noses at the latching arms of the separating section 40 preventing an outward movement. Figure 4 The abutment section 36 prevents the annular core 18 from moving in the direction of the first annular core. Figure 4 Both annular cores 12 , 18 are located on the upper side of the base 24 and are prevented from moving away from the surface of the base by the retaining and separating element 30 .

[0086] exist Figure 4 It can also be seen in FIG. 1 that the retaining and separating element 30 separates the windings on the annular core 12 or 18 from one another and prevents the winding wires of the windings from touching one another, for example when they are displaced relative to the annular core 12 , 18 .

[0087] Figure 5 The holding and separating element 30 is shown in a view obliquely from the front. The holding section 32 inserted into the recess 34 of the base 24 can be seen. Figure 4 Furthermore, it can be seen that the contact section 36 contacts the inner side of the two annular cores 12, 18 at its crossbar, see Figure 4 .exist Figure 5At the left-hand separating section 38 in FIG. 2 , two latching arms 42 and 44 can be seen, wherein the latching arm 42 has a latching nose 46 pointing away from the holding section 32 and the latching arm 44 has a latching nose 48 facing the holding section 32. The latching noses 46, 48 prevent the first annular core 12 from moving away from the holding and separating element 30.

[0088] The separating section 40 is situated opposite the separating section 38 and is designed symmetrically to the separating section 38 , wherein a plane of symmetry runs centrally through the contact section 36 and the holding section 32 .

[0089] Between the contact section 36 and the holding section 32, an oval recess 50 can be seen extending into the separation section 38 and the separation section 40. The recess 50 together with the cutout 52 extending parallel to the recess 50 ensures elastic deformability of the separation sections 38, 40, so that when pushed into the interior of the annular core 12, 18, the latching arms 42, 44 of the separation section 38 and the latching arms of the separation section 40 can be moved toward each other and then can be re-opened again after traversing the interior, see Figure 4 .

[0090] Figure 6 Shows Figure 5 A top view of the retaining and separating element 30 .

[0091] Figure 7 The passive structural element 10 according to the invention is shown in a view obliquely from below. A total of six contact pins 28 can be seen on the underside of the base 24, which can be inserted into suitable through-holes of a printed circuit board, for example. Then, the lines 1, 2, 3, 4 (see Figure 1 ) can be connected to the contact pin 28. The winding wires of each of the two windings are connected to the Figure 7 The middle contact pin 28 is connected to achieve Figure 1 The interconnection of the common mode choke CMC and the differential mode choke DMC is schematically shown.

Claims

1. A passive electrical component (10) for attenuating common-mode and differential-mode interference on at least two electrical lines (1, 2, 3, 4) leading to the component (10), the passive electrical component having two annular cores (12, 18), wherein at least two windings (14, 16, 20, 22) are arranged on each of the annular cores (12, 18), wherein the two windings on the first annular core (12) are wound and / or interconnected in such a way that a high attenuation of common-mode signals on the electrical lines (1, 2, 3, 4) is achieved, and wherein the two windings (20, 22) on the second annular core (18) are wound and / or interconnected in such a way that a high attenuation of differential-mode interference on the electrical lines (1, 2, 3, 4) is achieved.

2. The passive electrical structural element according to claim 1, characterized in that: The first annular core (12) is formed of ferrite, in particular manganese-zinc ferrite.

3. Passive electrical structural components, characterized in that: The second annular core (18) is formed from iron, in particular iron powder.

4. Passive electrotechnical structural element according to at least one of the preceding claims, characterized in that The two annular cores (12, 18) are arranged on a common base (24).

5. Passive electrotechnical structural element according to at least one of the preceding claims, characterized in that The two annular cores (12, 18) are parallel to one another and are arranged in such a way that their through holes are aligned.

6. Passive electrotechnical structural element according to at least one of the preceding claims, characterized in that The two annular cores (12, 18) have the same geometric dimensions, the diameter and material of the winding wires used for all windings (14, 16, 20, 22) are the same, and / or the number of turns of all windings (14, 16, 20, 22) is the same.

7. The passive electrical structural element according to at least one of the preceding claims, comprising two annular cores (12, 18) and a base, the annular cores being arranged on the base, wherein on each annular core (12, 18) two windings (14, 16, 20, 22) are arranged which are separated from one another in space, so that on each annular core (12, 18) a first winding (14, 20) is arranged on a first angular region of the annular core (12, 18) and a second winding is arranged on a second angular region of the annular core (12, 18), wherein the first angular region and the second angular region are different from one another and do not overlap, wherein a retaining and separating element (30) is provided which is connected to the base (24) on the one hand and engages in the interior of each annular core (12, 18) on the other hand, wherein The retaining and separating element (30) is constructed as a single piece, wherein the retaining and separating element (30) has two separating sections (38, 40), wherein the first separating section (38) abuts at least two contact locations spaced apart from each other on the inner circumference of the first annular core, thereby separating the first angular region on the first annular core (12) for the first winding (14) and the second angular region on the first annular core (12) for the second winding (16) from each other on the inner circumference of the first annular core (12), and wherein the second separating section (40) abuts at least two contact locations spaced apart from each other on the inner circumference of the second annular core (18), thereby separating the first angular region on the second annular core (18) for the first winding and the second angular region on the second annular core (18) for the second winding (22) from each other on the inner circumference of the second annular core (18).

8. The passive structural element according to claim 7, characterized in that: The two annular cores (12, 18) are arranged parallel to each other, wherein a contact section of the retaining and separating element (30) is arranged between a first side surface of the first annular core (12) and a second side surface of the second annular core (18) facing the first side surface of the first annular core (12), and wherein the first side surface of the first annular core (12) and the second side surface of the second annular core (18) are in contact with the contact section.

9. The passive structural element according to claim 7 or 8, characterized in that: The retaining and separating element (30) is designed in the form of a plate.

10. The passive structural element according to any one of the preceding claims 7 to 9, characterized in that At least the separating sections (38, 40) of the retaining and separating element (30) are designed to be elastically deformable.

11. The passive structural element according to claim 10, characterized in that: The separating sections (38, 40) are each provided with at least one cutout (52) which extends from a boundary of the retaining and separating element (30) into the separating sections (38, 40).

12. Passive structural element according to at least one of the preceding claims 7 to 11, characterized in that The two separation sections (38, 40) are connected to one another, and an elongated recess / through hole (50) extends from the first separation section (38) to the second separation section (40). (Elastically deformable) 13. The passive structural element according to claims 11 and 12, characterized in that Each separation section (38, 40) is provided with two cutouts (52), which extend straightly from the boundary of the separation section (38, 40) toward the opposite separation section (38, 40) into the separation section (38, 40), and the elongated recess / through hole (509) is arranged parallel to the two cutouts (52).

14. Passive structural element according to at least one of the preceding claims 7 to 13, characterized in that The free ends of the separation sections (38, 40) are each provided with at least one latching nose (46, 48) in order to engage behind a side surface of the respective annular core (12, 18).

15. The passive structural element according to claim 14, characterized in that The free end of each separation section (38, 40) is provided with two oppositely disposed latching noses (46, 48) in order to engage behind the side faces of the respective annular core (12, 18) at two oppositely disposed locations.

16. Passive structural element according to at least one of the preceding claims 7 to 15, characterized in that The holding and separating element (30) is inserted with a holding section (32) into a recess of the base.

17. The passive structural element according to claim 16, characterized in that The holding section (32) is designed to be elastically deformable.

18. The passive structural element according to claim 17, characterized in that The holding section (32) is provided with at least one cutout which extends from a boundary of the holding and separating element (30) into the holding section (32).

19. Passive structural element according to at least one of the preceding claims 7 to 18, characterized in that The retaining and separating element (30) is designed as a plastic injection-molded part.

20. The passive structural element according to at least one of the preceding claims, characterized in that The base (24) is provided with a cutout (26) starting from a side surface of the base (24) so ​​as to guide the winding wire to the underside of the base (24).

21. The passive structural element according to at least one of the preceding claims, characterized in that The lower side of the base (24) facing away from the annular core (12, 18) is provided with a contact surface or contact pin (28).

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