Electrical device

Abstract

The invention relates to an electrical device (1) through which electrical signals are transmitted, such as, for example, a flat tape cable (2), an integrated semiconductor module, a circuit arrangement or other cable having a magnetic film or magnetic strip (4) disposed thereon.

Description

Technical Field

[0001] The invention relates to an electrical device, via which electrical signals are transmitted, such as, for example, a flat ribbon cable, an integrated semiconductor module, a circuit arrangement or other cables. Background Art

[0002] Electronic devices used today work mainly with electrical signals, i.e. with voltages and currents, which are relatively small and therefore sensitive to interference. However, high-quality signal transmission is important in many fields. For example, in the field of HiFi equipment, even small external interference signals can already generate undesirable noise and interference components on the useful signal. In addition, today's electronic circuits also have a non-negligible intrinsic noise, which can impair the useful signal. Summary of the invention

[0003] The invention is based on the object of providing a method which can be easily implemented in order to reduce signal noise in electrical devices which transmit electrical signals.

[0004] The object is achieved by the following device, which has: at least one flat ribbon cable, which has an electrical conductor or a plurality of electrical conductors arranged side by side in the width direction of the flat ribbon cable and insulated relative to each other, the electrical conductors being wrapped by an insulating material; and at least one flat ribbon magnetic strip and / or at least one magnetic film, which is arranged on at least one flat side of the flat ribbon cable and extends over at least a part of the longitudinal extension of the flat ribbon cable or over the entire length of the flat ribbon cable.

[0005] The present invention is also suitable for other electrical equipment or electrical devices that transmit electrical signals.

[0006] Therefore, at least one flat magnetic strip and / or magnetic film is used as a magnetic field generator. Such elements are commercially available. The flat magnetic strip and / or magnetic film can have individual bar-shaped magnets arranged side by side, which are designed as permanent magnets of different polarity and are arranged alternately side by side. The flat magnetic strip or magnetic film can have a carrier material in which the individual magnets arranged side by side are embedded.

[0007] Here, the magnetic field generator, ie the flat ribbon magnetic strip or magnetic film, can be placed on the outside of the flat ribbon cable and thus be bonded thereto, for example. It is also possible to manufacture the flat ribbon cable directly together with the magnetic field generator in an integrated manufacturing process, wherein the magnetic field generator is then directly applied to the flat ribbon cable.

[0008] In another advantageous variant, one or more electrical conductors of the flat ribbon cable can be embedded in the carrier material of the flat ribbon magnetic strip and / or magnetic film, in particular in the magnetic strip. Here, the flat ribbon magnetic strip and / or magnetic film can also extend over at least a portion of the longitudinal extension of the flat ribbon cable or over the entire length of the flat ribbon cable. In this way, the flat ribbon cable with the flat ribbon magnetic strip or magnetic film can be produced in an integrated manufacturing process without having to subsequently apply the flat ribbon magnetic strip or magnetic film.

[0009] According to an advantageous design of the present invention, at least one flat ribbon magnetic strip and / or magnetic film is arranged on two flat sides of the flat ribbon cable and extends within at least a portion of the longitudinal extension of the flat ribbon cable or within the entire length of the flat ribbon cable. This can further improve the advantageous shielding effect of the present invention.

[0010] According to an advantageous embodiment of the invention, it is proposed that one or more electrical conductors in the flat ribbon cable are formed by a flat sheet material, which has a significantly greater width than thickness. Thus, one or more electrical conductors have a larger dimension in the width direction of the flat ribbon cable than in the direction of the thickness of the flat ribbon cable. The flat ribbon cable can have, in particular, only one continuous wide electrical conductor made of flat material. Silver, copper, gold or alloys of these materials are particularly suitable as sheet materials for one or more electrical conductors.

[0011] According to an advantageous design of the present invention, one or more electrical conductors are respectively wrapped by an insulating layer formed by lacquer. For this purpose, for example, transformer lacquer can be used, similar to enameled copper wire. The lacquer insulation layer can be applied to the corresponding electrical conductor, for example, by means of a lacquering method.

[0012] The objects mentioned at the outset are also achieved by an integrated semiconductor module having a housing made of plastic or another insulating material, in which a semiconductor circuit is embedded and having a plurality of connection pins or connection pads accessible on the outside of the housing, wherein at least one flat magnetic strip and / or at least one magnetic film is arranged on the housing top side, extending over a portion of the housing top side or over the entire housing top side. The flat magnetic strip and / or the magnetic film can be applied directly to the outer surface of the housing.

[0013] According to an advantageous embodiment of the present invention, at least one flat magnetic strip and / or magnetic film is provided on the housing bottom, and the flat magnetic strip or the magnetic film extends over a portion of the housing bottom or over the entire housing bottom.

[0014] The purpose mentioned at the beginning is also achieved by a circuit device, which has at least one circuit board and electrical and / or electronic components arranged on the circuit board, wherein at least one flat magnetic strip and / or at least one magnetic film is arranged on the circuit device, and the flat magnetic strip or the magnetic film extends within a part of the planar extension of the circuit board or within the entire planar extension of the circuit board.

[0015] According to an advantageous design of the present invention, at least one flat magnetic strip and / or magnetic film is provided on both sides of the circuit device, and the flat magnetic strip or the magnetic film extends within a part of the planar extension of the circuit board or within the entire planar extension of the circuit board.

[0016] The purpose mentioned at the beginning is also achieved by a power strip, which has a housing, a plurality of sockets with electrical contacts and connecting lines arranged in the housing to connect the contacts of the sockets to one or more feeder lines, wherein at least one flat magnetic strip and / or at least one magnetic film is respectively arranged on one, a plurality of or all connecting lines, and the flat magnetic strip or the magnetic film extends within a part of the planar extension of the connecting line or within the entire planar extension of the connecting line. In this way, interference can also be eliminated or protected from interference radiation for the power strip. The connecting line can be configured, for example, as a flat conductor, for example in the form of a strip-shaped metal sheet, on which at least one flat magnetic strip and / or at least one magnetic film is arranged on one or two opposite surface sides. The power strip can be configured in particular as a power strip for commercial AC current supply, i.e. for a 220V or 110V power grid.

[0017] According to an advantageous design of the present invention, the power strip has one or more sleeve-like bodies, wherein the sleeve-like bodies respectively extend in an annular manner around the electrical contacts of the corresponding sockets, wherein the sleeve-like bodies are completely or partially formed by permanent magnets, in particular by at least one flat magnetic strip and / or at least one magnetic film. Here, the sleeve-like body can have at least one permanent magnet in the range of its entire circumference and / or in the range of its entire longitudinal extension.

[0018] Furthermore, the object mentioned at the outset is achieved by a cable having at least one electrical conductor and an inner insulating layer surrounding the electrical conductor, characterized in that one or both of the following features a) and b) are provided:

[0019] a) the ferromagnetic fluid is disposed within an inner insulating layer at at least one electrical conductor;

[0020] b) The inner insulating layer is surrounded by an additional outer insulating layer, wherein a ferrofluid is arranged between the inner insulating layer and the outer insulating layer.

[0021] According to an advantageous design of the present invention, the magnet device is arranged at the cable along the longitudinal extension, wherein the magnet device surrounds the outer insulation layer respectively, or surrounds the inner insulation layer when the outer insulation layer is not present. The magnet device can, for example, have a plurality of annular magnets, at least one flat magnetic strip and / or a magnetic film.

[0022] Therefore, the present invention is suitable not only for single-core cables, in which an external insulating layer is not additionally present, but also for single-core or multi-core cables with the mentioned external insulating layer. The electrical conductor can be designed as a solid single conductor or as a stranded conductor. Ferrofluids are liquids that react to magnetic fields without solidification. Ferrofluids can, for example, consist of magnetic particles that are relatively small, for example only a few nanometers large, and are suspended in a carrier liquid. The particles can, for example, consist of iron, magnetite and / or cobalt. The particle size can, for example, be smaller than the magnetic domain, for example, in the order of 5 nm to 10 nm in diameter.

[0023] The object mentioned at the outset is also achieved by an electrical plug connector for connection to a mating plug connector provided as a counterpart, in particular to a socket of a power strip of the type described above, wherein the electrical plug connector has one or more plug contacts, characterized in that it has the following features:

[0024] a) at least one plug contact has an electrically conductive outer body, in the interior of which a permanent magnet is arranged, wherein the permanent magnet extends over a part of the longitudinal extension of the outer body or over the entire longitudinal extension of the outer body,

[0025] and / or

[0026] b) The plug-in connector has a sleeve-like body, which extends from the outside around a plug-in contact or multiple plug-in contacts and is spaced apart from the plug-in contact or multiple plug-in contacts, wherein the sleeve-like body is completely or partially composed of a permanent magnet, in particular composed of at least one flat magnetic strip and / or at least one magnetic film.

[0027] In this way, interference can be better excluded for the electrical plug connector. For example, the corresponding plug contact can be formed by a cylindrical, sleeve-like tube section, which is made of an electrically conductive material, such as silver or copper, or is coated on the outside with such an electrically conductive material. A permanent magnet in the form of a pin (magnetic pin) can then be used inside the tubular body.

[0028] In the following, an electrical component that transmits electrical signals is understood to mean any type of electrical component in which a voltage signal or current signal that changes over time occurs. In particular, this also includes electromechanical and electronic components. For example, such components include electrical plug connectors, electrical conductors, circuits, for example in the form of assembled circuit boards, or individual electrical or electronic components such as microprocessors.

[0029] Interference quantities with a wide, non-specific frequency spectrum are usually understood as signal noise. Signal noise can be generated by internal and external noise sources. Different causes of internal noise sources are already known from the literature, such as thermal noise, also known as Johnson noise, or shot noise. Another internal noise source is the generation of composite noise in semiconductors. External noise sources are, for example, electromagnetic interference sources (EMC), such as current conductors driven by 50 Hz AC voltage, radio transmitters or household appliances. As an external noise source, cosmic background noise is also known.

[0030] The invention advantageously enables a significant reduction of signal noise caused, for example, by the aforementioned noise sources by means of a magnetic field generator, which is advantageously arranged in a specific manner relative to the electrical device. The arrangement is advantageously carried out so that the magnetic flux density (B) acting on the electrical device by the magnetic field generator is significantly greater than the average magnetic flux density (B) generated by the electrical signal and coming from the electrical device. As a result, the magnetic field acts on the electrical device relatively strongly compared to the transmitted electrical signal and the noise portion contained therein, or compared to the magnetic field induced by these signals or noise portions on a time average. The relatively strong magnetic field causes an equalization of the electron movement of the electrical signal in the electrical device and an equalization of the electron movement in the atoms of the material of the electrical device, thereby reducing in particular the noise portion generated by internal noise sources. Advantageously, the relatively strong magnetic field additionally shields the electrical device placed within the magnetic field from external interference sources, so that the noise portion of the external noise source in the signal is reduced. In general, a signal noise reduction of at least 85 dB can be achieved thereby.

[0031] Advantageously, the electric component is arranged rigidly compared to the magnetic field generator, thereby avoiding relative movements between the electric component and the magnetic field generator.

[0032] Advantageously, the magnetic field generator forms an effective shielding device for the electrical component in order to shield the electrical component from external interfering radiation.

[0033] According to the invention, a magnetic field is generated around the electrical component, which shields against external interference radiation, since the energy of the interference sources that are usually present is less than the energy of the magnetic field in the area of ​​the electrical component. The magnetic field also results in a quality improvement in electrical components, for example in electronic devices, in cables and plug connectors, since these components can operate without interference and even the slightest signals can be transmitted therein.

[0034] It has been found that the advantageous noise reduction properties of the invention are already perceptible in conventional HiFi equipment at a magnetic flux density of B = 0.5 Tesla. Particularly advantageously, a reduction in signal noise is achieved at a magnetic flux density in the range of B = 1.29 Tesla to 1.42 Tesla.

[0035] Advantageously, the magnetic field generator generates a substantially static magnetic field. The magnetic field generator can advantageously be designed as a permanent magnet or have a permanent magnet, for example. Permanent magnets have the advantage over electromagnets that they do not require electrical energy to generate a static magnetic field. Permanent magnets can therefore be easily used to implement the invention in areas where no current supply is provided for generating a magnetic field. Furthermore, permanent magnets also do not consume electrical energy, so that they are also advantageous in terms of low energy consumption.

[0036] In this way, inductive interferences entering the corresponding electrical components can be reliably avoided, which is particularly important for signal cables for measurement technology (measurement cables), signal cables for entertainment electronics (audio cables / video cables) as well as signal cables and printed circuit boards for electronic components. By using flat magnetic strips and / or magnetic films with different magnetic field strengths, it is possible to achieve mutual and external shielding in the electronic components. Individual electronic components can also be shielded from inductive interferences by such flat magnetic strips and / or magnetic films, in that the electronic components are covered or encased by flat magnetic strips and / or magnetic films. In the case of a plurality of electronic components on a circuit board, shielding of the entire circuit board is possible by positioning one or more flat magnetic strips and / or magnetic films side by side and / or one above the other.

[0037] Flat strip magnetic strips and / or magnetic films can be designed with different magnet strengths. For example, they can contain ferrite magnets and / or neodymium magnets. Both magnet types can be used to individually adapt the magnetic field strength to the conditions.

[0038] It is also possible in cable systems to ensure that the individual conductors are shielded from one another by arranging flat magnetic strips and / or magnetic films above or below the cable material. This minimizes crosstalk between the individual conductors. In addition, signal noise is significantly reduced. Influences from the outside by induction or other interference from the environment can also be significantly minimized at the electrical components.

[0039] By introducing ferromagnetic fluid into the cable interior, inductive shielding of each conductor relative to the environment and relative to each other can also be achieved. If, in addition, a static magnetic field is generated outside the cable, for example, by an annular magnet arranged at the cable from the outside or a magnetic film or a flat band magnetic strip arranged thereon, the shielding effect can be further improved. The ferromagnetic fluid also shields the individual conductors of the thin core from each other and there is no longer a major crosstalk between the individual conductors. Signal noise is also significantly reduced here. In this way, the most subtle signals can also be reliably transmitted in electronic devices and in cable systems. This results in a significant improvement in the clarity of signal reproduction. It is thus possible to process and evaluate the following signals, which can no longer be meaningfully processed without the improvement.

[0040] The present invention will be explained in detail below based on embodiments by using the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings show

[0042] Figure 1 Different embodiments of magnetically shielded flat ribbon cables are shown;

[0043] Figure 2 An integrated semiconductor module showing magnetic shielding;

[0044] Figure 3 A circuit arrangement showing magnetic shielding;

[0045] Figure 4 A magnetically shielded cable is shown;

[0046] Figure 5 Other embodiments of magnetically shielded flat ribbon cables are shown;

[0047] Figure 6 A flat ribbon cable having electrical conductors integrated in a flat ribbon magnetic strip is shown;

[0048] Figure 7 An electrical plug connector is shown in different embodiments;

[0049] Figures 8 to 10 Shows different views of a power strip. DETAILED DESCRIPTION

[0050] Figure 1The corresponding devices 1 are shown, each of which has a flat ribbon cable 2. The flat ribbon cable 2 has a plurality of electrical conductors 3 arranged side by side, insulated relative to one another, and wrapped by an insulating material 6. Magnetic shielding in the form of flat ribbon magnetic strips 4 and / or magnetic films is provided on the two flat sides of the flat ribbon cable 2. The flat ribbon magnetic strips 4 and / or magnetic films have individual magnetic strips arranged side by side, which are designed as permanent magnets of different polarity and are arranged alternately side by side. The two upper devices 1 are provided with flat ribbon magnetic strips 4, wherein the individual magnets 5 extend side by side in the longitudinal direction in the form of strips. In the two lower devices 1, the magnets 5 are arranged orthogonally, i.e. the magnet strips extend side by side transversely to the longitudinal direction of the flat ribbon cable 2.

[0051] Figure 2 An integrated semiconductor module 10, such as a microprocessor, is shown, which has a housing 13 and a plurality of connection pins 11. For example, the semiconductor module 10 can be soldered to a circuit board 12 by means of its connection pins 11. A magnetic shielding device in the form of a flat magnetic strip 4 and / or a magnetic film is arranged on the semiconductor module 10 or on its housing 13. Here again, the magnets 5 arranged side by side in the form of individual strips can be seen, which are arranged there alternately with different polarities.

[0052] Figure 3 A circuit arrangement 20 is shown, which has a circuit board 21 and electrical and / or electronic components 22 arranged on the circuit board. A magnetic shielding device is arranged on the circuit arrangement 20, which is in the form of a plurality of flat magnetic strips 4 and / or magnetic films arranged side by side. Here again, bar-shaped magnets 5 arranged side by side are also seen, which are arranged side by side with alternating polarity.

[0053] Figure 4 A cable 30 is shown having a plurality of individual electrical conductors 31, which are each arranged in an inner insulating layer 32 that encloses the individual electrical conductors. In addition, there is an outer insulating layer 33, which surrounds the outer insulating layer 32 of the electrical conductors 31. In addition, a ferromagnetic fluid 34 is arranged within each of the inner insulating layers 32 and / or between the inner insulating layer 32 and the outer insulating layer 33. The cable 30 is also surrounded on the outside by a magnet arrangement 35. The magnet arrangement 35 can be formed by a plurality of annular magnets arranged in succession and / or by at least one flat strip magnetic strip and / or a magnetic film.

[0054] Figure 5An embodiment of a device 1 is shown, each of which has a flat ribbon cable 2, which has only one single electrical conductor 3 in the form of a flat strip, which extends substantially over the entire width of the flat ribbon cable 2. The electrical conductor 3 is in turn wrapped with an insulating layer 6. Magnetic shielding in the form of flat ribbon magnetic strips 4 and / or magnetic films is provided on both flat sides of the flat ribbon cable 2. The flat ribbon magnetic strips 4 and / or magnetic films have individual magnetic strips arranged side by side, which are designed as permanent magnets of different polarity and are arranged alternately side by side. The device 1 shown in the upper part is provided with a flat ribbon magnetic strip 4, in which the individual magnets 5 extend side by side in the longitudinal direction in the form of strips. In the lower device 1, the magnets 5 are arranged orthogonally, that is, the magnetic strips extend side by side transversely to the longitudinal direction of the flat ribbon cable 2.

[0055] Figure 6 A device 1 with a flat ribbon cable 2 is shown, wherein the electrical conductors 3 are directly integrated into the carrier material of the flat ribbon magnetic strip 4. The individual electrical conductors 3 each have an insulating layer surrounding them, which insulating layer can be composed of lacquer, for example. The electrical conductors 3 can be directly integrated into the carrier material of the flat ribbon magnetic strip 4 during the production of the flat ribbon magnetic strip 4. The flat ribbon magnetic strip 4 has individual magnetic strips 5 arranged side by side, which are designed as permanent magnets of different polarities and are arranged alternately side by side. The individual magnets 5 can extend in strips in the longitudinal direction side by side or orthogonally thereto, that is, the magnets can also be arranged in strips side by side transversely to the longitudinal direction of the flat ribbon cable 2.

[0056] Figure 7 Different embodiments of electrical plug connectors 50 are shown in a perspective view in each case in the direction of observation on the plug surface. The plug connectors 50 can have a housing 51 and can each have a plurality of plug contacts 52, such as, for example, the two plug connectors 50 shown on the left, or can have only one plug contact 52, such as the plug connector 50 shown on the right. The plug contacts 52 each have an electrically conductive outer body 53, which is, for example, in the form of a pipe section, in the interior of which a permanent magnet 54, for example a magnetic pin, is inserted.

[0057] In addition, the corresponding plug connector 50 has a sleeve-like body 55 which surrounds the plug contact 52 and is made completely or partially of a permanent magnetic material. The sleeve-like body 55 is spaced apart from the plug contact 52, i.e. there is a gap into which a part of the mating plug connector can be inserted. In this way, a magnetic ring is formed around the plug contact 52. This ensures that the contact surface of the plug contact 52 is shielded, because a static magnetic field is formed in the gap between the permanent magnet 54 and the outer magnetic ring, i.e. the surrounding sleeve-like body 55.

[0058] As indicated by the two plug connectors 50 depicted on the right, the plug connector 50 can also have a handle movable in the longitudinal direction at its housing 51. Here, a sleeve-like body 55 can be arranged below the movable handle, which sleeve-like body assumes the outer shielding.

[0059] Figure 8 A power strip 40 is shown, for example for a 220 V alternating current supply, which has a housing 42 and a plurality of sockets 43 accessible at the outside of the housing 42. An electrical plug connector 50 can be inserted into each socket 43, for example according to Figure 7 Plug connector 50.

[0060] like Fig. 9 and 10 As shown, the power strip 40 has different components for magnetic shielding. A connecting line 41 is arranged inside the housing 42, which connects the individual contacts of the socket 43 to the common feed line of the power strip 40. The connecting line 41 is provided with a flat magnetic strip 4 and / or a magnetic film, or with another type of permanent magnet 44. For external shielding, the contacts of the socket 43 can be additionally surrounded by a sleeve-like body 45, which is at least partially or completely composed of a permanent magnetic material.

Claims

1. An electrical device (1), comprising at least one electrical component and at least one flat magnetic strip (4) arranged on the electrical component and / or at least one magnetic film arranged on the electrical component, wherein the electrical component is configured as follows: a) a flat ribbon cable (2) comprising an electrical conductor (3) or a plurality of electrical conductors (3) arranged side by side in the width direction of the flat ribbon cable and insulated relative to one another, the electrical conductors being sheathed by an insulating material (6), wherein at least one flat ribbon magnetic strip (4) and / or at least one magnetic film is arranged on at least one flat side of the flat ribbon cable (2) or one or more of the electrical conductors (3) are embedded in a carrier material (magnetic strip) of the flat ribbon magnetic strip (4) and / or of the magnetic film, wherein the flat ribbon magnetic strip (4) and / or the magnetic film extend over at least a portion of the longitudinal extension of the flat ribbon cable (2) or over the entire length of the flat ribbon cable (2), and / or b) An integrated semiconductor module (10) having a housing (13) made of plastic or other insulating material, in which a semiconductor circuit is embedded and having a plurality of connection pins (11) or connection pads which are contactable on the outside (13) of the housing, wherein at least one flat magnetic strip (4) and / or at least one magnetic film is arranged on the housing top side, the flat magnetic strip or the magnetic film extending over a part of the housing top side or over the entire housing top side, and / or c) A circuit arrangement (20) comprising at least one circuit board (21) and electrical and / or electronic components (22) arranged on the circuit board, wherein at least one flat magnetic strip (4) and / or at least one magnetic film is arranged on the circuit arrangement (20), the flat magnetic strip or the magnetic film extending within a part of the planar extension of the circuit board (21) or within the entire planar extension of the circuit board (21), and / or d) A power strip (40), comprising a housing (42), a plurality of sockets (43) with electrical contacts and a connecting line (41) arranged in the housing (42) for connecting the contacts of the sockets (43) to one or more feeder lines, wherein at least one flat magnetic strip (4) and / or at least one magnetic film are respectively arranged on one, a plurality of or all of the connecting lines (41), and the flat magnetic strip or the magnetic film extends within a part of the planar extension of the connecting line (41) or within the entire planar extension of the connecting line (41).

2. The device according to claim 1, It is characterized in that At least one flat magnetic strip (4) and / or magnetic film is arranged on both flat sides of the flat ribbon cable (2) and extends over at least a part of the longitudinal extension of the flat ribbon cable (2) or over the entire length of the flat ribbon cable (2).

3. The device according to claim 1 or 2, It is characterized in that The electrical conductor or conductors (3) in the flat ribbon cable (2) are formed from a flat sheet of material having a width which is significantly greater than its thickness.

4. The device according to any one of claims 1 to 3, It is characterized in that One or more of the electrical conductors (3) are each surrounded by an insulating layer formed by a lacquer.

5. The device according to claim 1, It is characterized in that At least one flat magnetic strip (4) and / or a magnetic film is arranged on the underside of the housing, and the flat magnetic strip or the magnetic film extends over a part of the underside of the housing or over the entire underside of the housing.

6. The device according to claim 1, It is characterized in that At least one flat magnetic strip (4) and / or magnetic film is arranged on both sides of the circuit device (20), and the flat magnetic strip or the magnetic film extends within a part of the planar extension of the circuit board (21) or within the entire planar extension of the circuit board (21).

7. The device according to claim 1, It is characterized in that The power strip (40) has one or more sleeve-like bodies (45), wherein the sleeve-like bodies extend in a ring shape around the electrical contact parts of the corresponding sockets (43), wherein the sleeve-like bodies (45) are completely or partially composed of permanent magnets (45), in particular, composed of at least one flat magnetic strip (4) and / or at least one magnetic film.

8. The device according to any one of the preceding claims, It is characterized in that The flat magnetic strip (4) and / or the magnetic film has individual strip-shaped magnets arranged side by side, which are designed as permanent magnets of different polarities and are arranged alternately side by side.

9. A cable (30) comprising at least one electrical conductor (3) and an insulating layer (32) surrounding the interior of the electrical conductor (3), It is characterized in that Having one or both of the following characteristics a) and b) : a) a ferromagnetic fluid is arranged on the at least one electrical conductor (3) within the inner insulating layer (32); b) The inner insulating layer (32) is surrounded by an additional outer insulating layer (33), wherein a ferromagnetic fluid is arranged between the inner insulating layer (32) and the outer insulating layer (33).

10. The cable according to claim 8, It is characterized in that A magnetic device (35) is arranged on the cable (30) along the longitudinal extension, wherein the magnetic device (35) respectively surrounds the outer insulating layer (33) or, if the outer insulating layer is not present, the inner insulating layer (32).

11. The cable according to claim 9, It is characterized in that The magnet arrangement (35) has a plurality of ring magnets, at least one flat magnetic strip (4) and / or a magnetic film.

12. An electrical plug connector (50) for connection to a mating plug connector provided as a mating part, in particular to a socket (43) of a power strip (40) according to claim 1, wherein the electrical plug connector (50) has one or more plug contacts (52), It is characterized in that It has the following characteristics: a) at least one plug contact (52) has an electrically conductive outer body (53), in the interior of which a permanent magnet (54) is arranged, wherein the permanent magnet (54) extends over a part of the longitudinal extension of the outer body (53) or over the entire longitudinal extension of the outer body (53), and / or b) The plug-in connector (50) has a sleeve-like body (55), which extends externally around the one plug-in contact (52) or the multiple plug-in contacts (52) and is spaced apart from the one plug-in contact (52) or the multiple plug-in contacts (52), wherein the sleeve-like body (55) is completely or partially composed of a permanent magnet (54), in particular, composed of at least one flat magnetic strip (4) and / or at least one magnetic film.

13. The electrical plug connector according to claim 11, It is characterized in that The sleeve-like body (55) has at least one permanent magnet (54) over its entire circumference and / or over its entire longitudinal extension.

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