Magnetic field-sensitive component, use of a magnetic field-sensitive component and transformer

Abstract

The invention relates to a magnetic field-sensitive component having a through-opening and an axial extent, wherein - the magnetic field-sensitive component has at least one cut surface, wherein the cut surface has a normal which is perpendicular to the axial extent of the magnetic field-sensitive component; - the magnetic field-sensitive component has a soft-magnetic substance, preferably a metallic glass; and - the magnetic field-sensitive component has a coercive field strength of less than or equal to 10 A / m, preferably a coercive field strength of less than or equal to 5 A / m and particularly preferably a coercive field strength of less than or equal to 3 A / m.

Description

[0001] Magnetic field sensitive component, use of a magnetic field sensitive component and transformer

[0002] The invention relates to a magnetic field sensitive component, a use of a magnetic field sensitive component and a transformer.

[0003] Magnetic field sensitive components, in particular magnetic cores, are used for a variety of electronic and / or electrical applications, preferably for power transmission in a transformer, for limiting currents in electrical lines, for temporarily storing energy in the form of its magnetic field, for impedance matching or for filtering an electronic or electrical signal.

[0004] When using a magnetic field-sensitive component as a magnetic core within a transformer, the transmission of electrical power should be as loss-free as possible. In particular, the magnetic flux induced by an electrical conductor carrying alternating current should be guided through the magnetic core with low loss and in a concentrated manner. For this purpose, a high magnetic saturation flux density and a magnetic permeability of the magnetic core of greater than or equal to 500 are particularly advantageous, preferably greater than or equal to 1,000, and particularly preferably greater than or equal to 2,000.

[0005] Particularly for applications with higher electrical power, cut magnetic cores are often required to achieve the required winding and insulation structure. Cutting a magnetic core creates an air gap, which leads to higher core losses and thus increased heat generation.

[0006] Particularly for the increasing number of high-power applications resulting from electromobility, there is a need to design high-power transformers that are as light and compact as possible. To achieve this, the required power must be transmitted with the lowest possible losses in order to generate as little heat as possible.

[0007] The invention is based on the object of providing an improvement or an alternative to the prior art.

[0008] According to a first aspect of the invention, the object is achieved by a magnetic field sensitive component with a through opening and an axial extension, wherein the magnetic field sensitive component has at least one cut surface, wherein the cut surface has a normal which is formed perpendicular to the axial extension of the magnetic field sensitive component; the magnetic field sensitive component has a soft magnetic material, preferably a metallic glass; and the magnetic field sensitive component has a coercive field strength of less than or equal to 10 A / m, preferably a coercive field strength of less than or equal to 5 A / m and particularly preferably a coercive field strength of less than or equal to 3 A / m.

[0009] The following term is explained in this regard:

[0010] First of all, it should be expressly pointed out that in the context of this patent application, indefinite articles and numerical expressions such as "one", "two", etc. are generally to be understood as "at least" expressions, i.e. as "at least one...", "at least two...", etc., unless it is expressly clear from the respective context or it is obvious or technically necessary for the person skilled in the art that only "exactly one...", "exactly two...", etc. can be meant.

[0011] In the context of this patent application, the expression "in particular" should always be understood as introducing an optional, preferred feature. The expression should not be understood as "and indeed" or "namely".

[0012] A "magnetic field-sensitive component" is understood to be a component, in particular a ferromagnetic component, which reacts to a magnetic field by changing at least one state variable of the component. A magnetic field-sensitive component can be used, among other things, together with electrical conductors to produce an inductive component that can be used for electrical and / or electronic applications.

[0013] A magnetic field sensitive component can have an extension of greater than or equal to 10 mm, preferably an extension of greater than or equal to 16 mm and particularly preferably an extension of greater than or equal to 22 mm.

[0014] A magnetic field sensitive component can have an extension of less than or equal to 500 mm, preferably an extension of less than or equal to 450 mm and particularly preferably an extension of less than or equal to 400 mm.

[0015] A "through-opening" is understood to mean a free cross-section formed in the interior region of the magnetic-field-sensitive component. Preferably, the through-opening extends in the direction of an "axial extension" of the magnetic-field-sensitive component.

[0016] The magnetic-field-sensitive component preferably has the shape of a toroidal core, whereby a particularly advantageous, in particular a particularly low, stray field of the magnetic-field-sensitive component can be achieved. This makes it possible for the magnetic-field-sensitive component and / or an inductive component manufactured with the magnetic-field-sensitive component to have particularly good electromagnetic compatibility. In particular, the magnetic-field-sensitive component designed in this way can influence a stray field of a nearby component.

[0017] The magnetic-field-sensitive component can have the shape of a discontinuous toroidal core. In other words, the magnetic-field-sensitive component can have an air gap at at least one location.

[0018] The inner contour of the magnetic field sensitive component forms the through opening of the magnetic field sensitive component.

[0019] Particularly preferably, the outer contour of the magnetic field sensitive component is formed as an oval and the inner contour of the magnetic field sensitive component is also formed as an oval with two axes of symmetry.

[0020] An "oval" is a plane, rounded, convex figure. An oval includes circles and ellipses as special cases, although in contrast to these, any oval does not need to have an "axis of symmetry". In particular, an oval is a closed, twice continuously differentiable convex curve in the plane. If the curve of an oval is arranged in a mirror image on both sides of an imaginary line, then the oval has one axis of symmetry. If the curve of an oval is arranged in a mirror image on both sides of two non-coincident imaginary lines, then the oval has "two axes of symmetry". In particular, a circle and an ellipse are each an oval with two axes of symmetry.

[0021] Alternatively, the outer contour and / or the inner contour of the magnetic field-sensitive component can be designed as a U-shape or as a C-shape or as a rectangle or as an interrupted rectangle, whereby a particularly advantageous, in particular a particularly low, stray field of the magnetic field-sensitive component can be achieved. In this way, the magnetic field-sensitive component and / or an inductive component produced with the magnetic field-sensitive component can have particularly good electromagnetic compatibility. In particular, the magnetic field-sensitive component designed in this way can advantageously influence a stray field of a nearby component to a particularly small extent.

[0022] Preferably, the magnetic field sensitive component has a substantially constant axial extent, in particular a constant axial extent.

[0023] Preferably, the material thickness of the magnetic field-sensitive component is largely constant or constant. In the special case in which the magnetic field-sensitive component is formed as a circle in cross section and the material thickness of the magnetic field-sensitive component is constant, the magnetic field-sensitive component has the geometry of a circular ring in cross section. A "sectional surface" is understood to mean a surface of the magnetic field-sensitive component at which the magnetic field-sensitive component ends, preferably ends in the azimuthal direction relative to the axial extent. In other words, a space starting from the cutting surface in the direction of a normal to the cutting surface does not have a magnetic field-sensitive component.

[0024] The magnetic-field-sensitive component can have two or more cut surfaces. In particular, the magnetic-field-sensitive component can have a first cut surface and a second cut surface, wherein the first cut surface and the second cut surface can be opposite one another and can be arranged at a distance from one another. In other words, the first cut surface and the second cut surface define an air gap.

[0025] Alternatively, the first cutting surface and the second cutting surface can be arranged at a distance from one another and have the same surface normal.

[0026] The magnetic-field-sensitive component can, in particular, comprise two magnetic-field-sensitive component parts, which can be produced by mechanically separating the magnetic-field-sensitive component. The two magnetic-field-sensitive component parts can each have a first cut surface and a second cut surface, wherein the respective first cut surfaces and the respective second cut surfaces can be opposite one another and can each delimit an air gap.

[0027] The first magnetic-field-sensitive component part and the second magnetic-field-sensitive component part can be arranged such that the respective first cut surfaces and the respective second cut surfaces are opposite one another and in contact with one another, preferably in planar contact. A "soft magnetic material" is understood to mean a material that can be easily magnetized in a magnetic field. A soft magnetic material preferably has a coercive field strength of less than or equal to 1,000 A / m.

[0028] Preferably, a soft magnetic material, in particular an amorphous soft magnetic material, preferably a metallic glass, comprises an alloy comprising iron, nickel and / or cobalt.

[0029] A "metallic glass" is understood to be a metal-based alloy of a material which, at the atomic level, does not have a crystalline but rather an amorphous structure and yet still exhibits metallic conductivity as a property. Preferably, a metallic glass can contain non-metallic alloy components in addition to metallic alloy components.

[0030] The amorphous atomic arrangement, which is very unusual for metals, advantageously enables special physical properties. In particular, the use of metallic glasses can advantageously reduce the coercive field strength of the magnetic-field-sensitive component and / or advantageously increase the permeability.

[0031] The term "coercive field strength" refers to the magnetic field strength necessary to completely demagnetize a magnetic field-sensitive component that has previously been charged to the saturation flux density.

[0032] The magnetic field-sensitive component preferably has a coercive field strength of less than or equal to 2 A / m, preferably a coercive field strength of less than or equal to 1.5 A / m and particularly preferably a coercive field strength of less than or equal to 1 A / m. Furthermore, the magnetic field-sensitive component preferably has a coercive field strength of less than or equal to 0.5 A / m, preferably a coercive field strength of less than or equal to 0.1 A / m and particularly preferably a coercive field strength of less than or equal to 0.05 A / m.

[0033] The less dissipation occurs during the designated power transfer from a magnetic field caused by an alternating current, in particular a high-frequency alternating current with a frequency of greater than or equal to 80 kHz, preferably greater than or equal to 200 kHz, through which the conductor section flows into a magnetic flux in the magnetic field-sensitive component and vice versa, the more efficiently power can be transferred through the magnetic field-sensitive component and the less heat is generated.

[0034] The lower the coercive field strength of the magnetic field-sensitive component, the lower the hysteresis losses occurring in the magnetic field-sensitive component and thus the resulting dissipation when an alternating current flows through a designated conductor section and the induced magnetic field triggers a magnetic flux in the magnetic field-sensitive component. With the coercive field strength of the magnetic field-sensitive component required here, particularly efficient power transmission can be achieved. Furthermore, the magnetic field-sensitive component can be achieved with particularly advantageous thermal stability even with a disadvantageous ratio of the surface area of ​​the magnetic field-sensitive component to the volume of the magnetic field-sensitive component.This further makes it possible to design the magnetic-field-sensitive component in smaller dimensions, particularly with the same power transmission. This additionally advantageously reduces the dissipation occurring in the magnetic-field-sensitive component at high-frequency polarity-changing field strengths, particularly at polarity-changing field strengths caused by a high-frequency current of greater than or equal to 80 kHz, preferably at polarity-changing field strengths caused by a high-frequency current of greater than or equal to 200 kHz.

[0035] The term “saturation flux density” refers to the maximum magnetic flux density of a material that can be achieved by an externally applied magnetic field in the material.

[0036] The magnetic field-sensitive component preferably has a saturation flux density of greater than or equal to 1.1 T, preferably a saturation flux density of greater than or equal to 1.2 T and particularly preferably a saturation flux density of greater than or equal to 1.3 T. Furthermore, the magnetic field-sensitive component preferably has a saturation flux density of greater than or equal to 1.4 T, preferably a saturation flux density of greater than or equal to 1.5 T and particularly preferably a saturation flux density of greater than or equal to 1.6 T.

[0037] A high saturation flux density allows a high magnetic flux to be transmitted in the magnetic field sensitive component and thus a high power.

[0038] The coercive field strength, remanence, and saturation flux density values ​​of the magnetic-field-sensitive component specified here enable particularly efficient power transmission through the magnetic-field-sensitive component. In particular, the combination of the specified values ​​can lead to a particularly advantageous hysteresis characteristic of the magnetic-field-sensitive component. This allows the magnetic-field-sensitive component to exhibit particularly low hysteresis losses during power transmission. The hysteresis characteristic can preferably be designed as a "Z-loop."

[0039] The magnetic field sensitive component can have a high permeability.

[0040] The "permeability" of a magnetic field-sensitive component is understood to mean the magnetization of a material in an external magnetic field. The higher the permeability of a magnetic field-sensitive component, the greater the ratio of magnetic flux density in the magnetic field-sensitive component to the magnetic field strength acting on the magnetic field-sensitive component. When using the term permeability in the context of this patent application, the relative permeability is always to be understood.

[0041] Thus, a magnetic-field-sensitive component with high permeability results in a comparatively high magnetic flux density within the magnetic-field-sensitive component, even at low magnetic field strengths. Thus, high permeability increases the conversion ratio of the magnetic field, particularly the magnetic field emanating from a conductor section designated for current flow, to the magnetic flux in the magnetic-field-sensitive component, and vice versa.

[0042] It is preferably proposed that the magnetic field sensitive component has a permeability which is greater than or equal to 1 000, preferably greater than or equal to 5 000, more preferably greater than or equal to 10 000 and particularly preferably greater than or equal to 20 000. Likewise preferably the magnetic field sensitive component has a permeability of greater than or equal to 35 000, preferably a permeability of greater than or equal to 45 000 and particularly preferably a permeability of greater than or equal to 50 000. Furthermore preferably the magnetic field sensitive component has a permeability of greater than or equal to 60 000, preferably a permeability of greater than or equal to 70 000 and particularly preferably a permeability of greater than or equal to 80 000. Also further preferably, the magnetic field sensitive component has a permeability of greater than or equal to 90,000, preferably a permeability of greater than or equal to 100.000 and particularly preferably a permeability of greater than or equal to 110 , 000 . Furthermore preferably, the magnetic field-sensitive component has a permeability of greater than or equal to 120 , 000 , preferably a permeability of greater than or equal to 130 , 000 and particularly preferably a permeability of greater than or equal to 140 , 000 . Preferably, the permeability of the magnetic field-sensitive component is greater than or equal to 150 , 000 .

[0043] It should be expressly noted that the above values ​​for the permeability of the magnetic-field-sensitive component are not intended to be understood as sharp limits, but rather should be capable of being exceeded or undercut on an engineering scale without departing from the described aspect of the invention. In simple terms, the values ​​are intended to provide an indication of the magnitude of the permeability of the magnetic-field-sensitive component proposed here.

[0044] Due to the comparatively high permeability of the magnetic-field-sensitive component proposed here, the magnetic field emanating from a designated current-carrying conductor can induce a particularly strong magnetic flux in the magnetic-field-sensitive component, and vice versa. In other words, at high permeability, the magnetic-field-sensitive component exhibits a steep transfer behavior between the magnetic field strength of the magnetic field emanating from the designated current-carrying conductor and the magnetic flux in the magnetic-field-sensitive component, and vice versa.

[0045] The higher the permeability of the magnetic field sensitive component, the higher the inductance of a designated inductive component comprising the magnetic field sensitive component at a given designated current through a designated electrical conductor.

[0046] The magnetic field-sensitive component can have a remanence of less than or equal to 0.7 T, preferably a remanence of less than or equal to 0.1 T and particularly preferably a remanence of less than or equal to 0.05 T.

[0047] The following terminology is used to explain this:

[0048] Remanence refers to the magnetization that a particle magnetized by an external magnetic field retains after the external magnetic field is removed.

[0049] Furthermore, the magnetic field-sensitive component preferably has a remanence of less than or equal to 1.8 T, preferably 1.5 T, further preferably 1.3 T, again preferably 1.1 T. The magnetic field-sensitive component can furthermore have a remanence of less than or equal to 0.9 T, preferably a remanence of less than or equal to 0.4 T, and particularly preferably a remanence of less than or equal to 0.02 T.

[0050] The magnetic field-sensitive component preferably has a ratio of remanence to saturation flux density of greater than or equal to 50%, preferably greater than or equal to 70%, and particularly preferably greater than or equal to 80%. Furthermore, the magnetic field-sensitive component preferably has a ratio of remanence to saturation flux density of greater than or equal to 85%, preferably greater than or equal to 90%, and particularly preferably greater than or equal to 95%.

[0051] The remanence values ​​specified here can be used to ensure that a reduced inrush current surge is required for electrical components containing the magnetic field-sensitive component.

[0052] The magnetic field sensitive component can exhibit magnetostriction with a relative change in length parallel to the magnetic field of less than or equal to 2 times 10~ 6 preferably less than or equal to 1 times 10~6 and particularly preferably less than or equal to 0.5 times 10~ 6 .

[0053] The following term is explained in this regard:

[0054] "Magnetostriction" refers to the deformation of a magnetic field-sensitive component as a result of an applied magnetic field. The magnetic field-sensitive component undergoes an elastic change in length at a constant volume.

[0055] The magnetostriction values ​​specified here ensure that the magnetic field sensitive component does not emit any disturbing noises during its designated use, and in particular does not emit any noises that are perceptible to humans.

[0056] The mechanical bond between the individual strip layers is particularly important for wound magnetic cores that have at least one cut surface. The magnetostriction values ​​specified here ensure that the magnetic field-sensitive component undergoes only slight deformation during its intended use. This prevents or reduces the risk of the mechanical bond between the individual wound layers breaking down, which is also detrimental to the magnetic properties. In other words, the elastic change in length of the magnetic field-sensitive component due to an applied magnetic field is so small that the influence on the cut surface is negligible. This makes it possible to achieve improved permeability of the magnetic component even during the service life of the magnetic field-sensitive component.

[0057] The at least one cut surface of the magnetic field sensitive component has a roughness R a of less than or equal to 12 , 5 pm , preferably a roughness R a of less than or equal to 6.3 pm and particularly preferably a roughness R a of less than or equal to 3 . 2 pm .

[0058] The following term is explained in this regard:

[0059] A "roughness" refers to the unevenness of the surface height. For the quantitative characterization of roughness, there are different calculation methods, each of which takes into account different characteristics of the surface. The "roughness R a " or mean roughness indicates the average distance of a measuring point on the surface to the center line .

[0060] It is understood that when specifying the roughness, the roughness of the cut surface can be understood as having an insulating layer, in particular an impregnating resin.

[0061] The lower the roughness of the cut surface of the magnetic field sensitive component, the lower the losses in permeability of the magnetic field sensitive component having at least one cut surface compared to a magnetic field sensitive component having no cut surface.

[0062] The roughness required here can be achieved by polishing the cut surface after cutting open the magnetic field sensitive component.

[0063] The magnetic field sensitive component preferably has a roughness R a of less than or equal to 1 , 6 pm to , preferably a roughness R a of less than or equal to 0 , 8 pm and particularly preferably a roughness R a of less than or equal to 0 , 4 pm .

[0064] The magnetic field sensitive component can at least partially have an insulating layer, in particular an impregnating resin.

[0065] The following term is explained in this regard:

[0066] An "insulating layer" can be formed at least partially from an electrically non-conductive material and / or a non-magnetic material, in particular from a molten plastic powder, preferably a thermoplastic and / or a thermoset.

[0067] An insulating layer may comprise an epoxy resin and / or a lacquer or multiple lacquer layers. This results in an insulating layer and / or fixing layer with a smaller volume than a non-conductive housing.

[0068] An insulating layer can be produced in particular by a spraying process and / or a dipping process and / or a coating process.

[0069] The insulating layer can preferably have a temperature resistance of greater than or equal to 150 ° C, preferably a temperature resistance of greater than or equal to 160 ° C and particularly preferably a temperature resistance of greater than or equal to 170 ° C. Furthermore preferably, the insulating layer can have a temperature resistance of greater than or equal to 180 ° C, preferably a temperature resistance of greater than or equal to 190 ° C and particularly preferably a temperature resistance of greater than or equal to 200 ° C.

[0070] In a visible structure of the magnetic-field-sensitive component, an insulating layer comprising a soft magnetic material can be arranged, particularly between the layers. This can reduce eddy current losses in the individual layers.

[0071] The surface of the magnetic field sensitive component can at least partially comprise a non-conductive layer, in particular a non-conductive layer comprising a plastic, preferably a non-conductive housing.

[0072] A non-conductive layer and / or a non-conductive housing can be formed at least partially from an electrically non-conductive material and / or a non-magnetic material, in particular from a molten plastic powder, preferably a thermoplastic and / or a thermoset or have such.

[0073] A non-conductive layer and / or a non-conductive housing can be produced in particular in an injection molding process and / or a thermoforming process and / or a PUR-RIM process and / or another plastics manufacturing process.

[0074] A non-conductive layer and / or a non-conductive housing may have a lower part and an upper part. The lower part and the upper part may be connected to one another by means of connecting devices, in particular connected to one another in such a way that the magnetic field-sensitive component is at least partially enclosed, preferably completely enclosed, by the non-conductive layer and / or the non-conductive housing.

[0075] A non-conductive layer and / or a non-conductive housing may be formed monolithically from one part.

[0076] A non-conductive layer may comprise an epoxy resin and / or one or more layers of lacquer. This allows for an insulating layer and / or fixing layer to be achieved with a smaller volume than with a non-conductive housing.

[0077] A non-conductive layer can be produced in particular by a spraying process and / or a dipping process and / or a coating process.

[0078] A non-conductive layer and / or a non-conductive housing can preferably have a temperature resistance of greater than or equal to 150 ° C, preferably a temperature resistance of greater than or equal to 160 ° C and particularly preferably a temperature resistance of greater than or equal to 170 ° C. Furthermore preferably, the non-conductive layer and / or the non-conductive housing can have a temperature resistance of greater than or equal to 180 ° C, preferably a temperature resistance of greater than or equal to 190 ° C and particularly preferably a temperature resistance of greater than or equal to 200 ° C.

[0079] The soft magnetic material can have a nanocrystalline structure.

[0080] The following definition should be used: A material with a "nanocrystalline structure" is understood to be a polycrystalline solid with a nano-microstructure, where the microstructure is understood to be the type, crystal structure, number, shape and topological arrangement of point defects, dislocations, stacking faults and / or grain boundaries in a crystalline material.

[0081] The nanocrystalline structure allows the physical properties of the magnetic-field-sensitive component to be further improved. In particular, the permeability of the soft magnetic material can be increased.

[0082] Preferably, a nanocrystalline material is produced from an amorphous material, wherein the crystal growth starting from the amorphous material is stimulated by the action of a thermal and / or magnetic effect.

[0083] The magnetic field-sensitive component preferably consists of a soft magnetic material with a nanocrystalline structure having a typical grain size in the range of 5 pm to 30 pm, preferably of a nanocrystalline soft magnetic material with a typical grain size in the range of 7 pm to 20 pm, particularly preferably of a nanocrystalline soft magnetic material with a typical grain size in the range of 8 pm to 15 pm. This makes it possible to achieve particularly advantageous physical properties for the magnetic field-sensitive component and thus also for the inductive component, in particular with regard to permeability and / or coercive field strength.

[0084] Due to the nanocrystalline structure, the adjustable physical properties of the magnetic-field-sensitive component are stable over a wide frequency range of an alternating current, which induces a polarity-alternating magnetic field in the magnetic-field-sensitive component. In particular, over an alternating current frequency range from greater than or equal to 75 kHz to less than or equal to 220 kHz.

[0085] Due to the nanocrystalline structure, the adjustable physical properties of the magnetic-field-sensitive component are stable over a wide temperature range, particularly over a temperature range from greater than or equal to 50 °C to less than or equal to 220 °C.

[0086] The soft magnetic material can have the following atomic composition:

[0087] [Fei-aNiaJ 100-xyza-ß-Y CU X S i y B zNbo ' ßM"y with a < 0.3, 0.6 < x < 1.5, 10 < y < 17, 5 < z < 14, 2 < a < 6, ß < 7, y < 8, where M' is at least one of the elements V, Cr, Co, Al and Zn, where M" is at least one of the elements C, Ge, P, Ga, Sb, In and Be.

[0088] Laboratory tests have shown that the above specification of the soft magnetic material leads to particularly advantageous material properties for the inductive component proposed here.

[0089] In particular, the above material specification makes it possible to achieve an inductive component with a particularly small coercive field strength and / or a particularly high permeability.

[0090] The above-specified soft magnetic solid preferably contains nickel, in particular a nickel content of greater than or equal to 4.5 wt.%, preferably a nickel content of greater than or equal to 5 wt.%, and particularly preferably a nickel content of greater than or equal to 5.5 wt.%. The magnetic field-sensitive component can have a fill factor of greater than or equal to 0.7, preferably greater than or equal to 0.75, and particularly preferably greater than or equal to 0.8.

[0091] The following terminology is used to explain this:

[0092] The "fill factor" of a magnetic field sensitive component is the ratio of a magnetizable material within the magnetic field sensitive component to a component of the same volume which consists entirely of the same magnetizable material.

[0093] Since the magnetic flux density is related to the number of magnetizable elementary magnets, the saturation flux density of layered components is always lower than that of components made of a solid material. The higher the fill factor, the higher the number of magnetizable elementary magnets in a component and thus the saturation flux density. In other words, the saturation flux density can be varied by adjusting the layer thickness while maintaining a constant component geometry. The lower the layer thickness, the higher the fill factor and thus the higher the achievable saturation flux density.

[0094] The magnetic field-sensitive component can have a fill factor of greater than or equal to 0.72, preferably a fill factor of greater than or equal to 0.74, and particularly preferably a fill factor of greater than or equal to 0.76. Furthermore, the magnetic field-sensitive component can have a fill factor of greater than or equal to 0.78, preferably a fill factor of greater than or equal to 0.85, and particularly preferably a fill factor of greater than or equal to 0.9. This makes it possible to achieve a particularly high saturation flux density of the magnetic field-sensitive component. The magnetic field-sensitive component can have more than 1 layer, preferably more than 5 layers, and particularly preferably more than 10 layers.

[0095] The magnetic field-sensitive component can be constructed in layers; in particular, the magnetic field-sensitive component can be wound from a material comprising a soft magnetic material, preferably wound around the axis of the axial extension. This makes it possible to influence the eddy current losses of the magnetic field-sensitive component. Preferably, the eddy current losses can be specifically adjusted via the layer thickness of the soft magnetic material, whereby the eddy current losses and thus the impedance of the magnetic field-sensitive component can be adjusted. In other words, the eddy current losses and the impedance can be adjusted by the strip thickness.The impedance of the magnetic-field-sensitive component can be used to influence and / or adjust the transmission behavior of the magnetic-field-sensitive component, in particular the attenuation of the magnetic-field-sensitive component, with respect to high-frequency currents. This can ensure that high-frequency currents, in particular high-frequency interference currents, are partially or completely dissipated by the magnetic-field-sensitive component.

[0096] The magnetic field-sensitive component can have more than 15 layers, preferably more than 20 layers, and particularly preferably more than 30 layers. Furthermore, the magnetic field-sensitive component can have more than 40 layers, preferably more than 50 layers, and particularly preferably more than 60 layers. The at least one layer of the magnetic field-sensitive component can have a layer thickness of less than or equal to 25 pm, preferably less than or equal to 20 pm, and particularly preferably less than or equal to 15 pm.

[0097] The at least one layer of the magnetic field-sensitive component can have a layer thickness of less than or equal to 30 pm, preferably less than or equal to 22 pm and particularly preferably less than or equal to 14 pm.

[0098] According to a second aspect of the invention, the object is achieved by using a magnetic field sensitive component for a transformer.

[0099] It is understood that the advantages of a magnetic field sensitive component according to the first aspect of the invention as described above extend directly to use in a transformer.

[0100] It should be expressly pointed out that the subject matter of the second aspect can be advantageously combined with the subject matter of the preceding aspect of the invention, both individually or cumulatively in any combination.

[0101] According to a third aspect of the invention, the object is achieved by using a magnetic field sensitive component for a choke.

[0102] It is understood that the advantages of a magnetic field-sensitive component according to the first aspect of the invention, as described above, extend directly to use in a choke. It should be expressly noted that the subject matter of the third aspect can be advantageously combined with the subject matter of the first aspect of the invention, both individually and cumulatively in any combination.

[0103] According to a fourth aspect of the invention, the object is achieved by using a magnetic field sensitive component for a current transformer.

[0104] It is understood that the advantages of a magnetic field sensitive component according to the first aspect of the invention as described above extend directly to use in a current transformer.

[0105] It should be expressly pointed out that the subject matter of the fourth aspect can be advantageously combined with the subject matter of the first aspect of the invention, both individually or cumulatively in any combination.

[0106] According to a fifth aspect of the invention, the object is achieved by a transformer comprising a magnetic field sensitive component according to the first aspect of the invention.

[0107] It is understood that the advantages of a magnetic field sensitive component according to the first aspect of the invention as described above extend directly to a transformer comprising a magnetic field sensitive component according to the first aspect of the invention.

[0108] It should be expressly noted that the subject matter of the fifth aspect can be advantageously combined with the subject matter of the first aspect of the invention, both individually or cumulatively in any combination. By using it as a line filter, in particular as a common-mode choke and as a differential-mode choke, common-mode interference currents and / or differential-mode interference currents can be choked, in particular reduced, by the inductive component.

[0109] It should be expressly pointed out that the subject matter of the fourth aspect can be advantageously combined with the subject matters of the preceding aspects of the invention, both individually or cumulatively in any combination.

[0110] Further advantages, details and features of the invention will become apparent from the following exemplary embodiments. These show in detail:

[0111] Figure 1: a first embodiment of a magnetic field sensitive component according to the first aspect of the invention in a perspective view

[0112] Figure 2: a second embodiment of a magnetic field sensitive component according to the first aspect of the invention in a perspective view

[0113] In the following description, identical reference symbols designate identical components or identical features, so that a description given with respect to one figure regarding a component also applies to the other figures, thus avoiding repetitive description. Furthermore, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0114] A first embodiment of a magnetic field sensitive component 10 with a through opening and an axial extension according to Figure 1 consists essentially of a first magnetic field sensitive component part 11 and a second magnetic field sensitive component part 12. The respective first cut surfaces 21 and the respective second cut surfaces 22 lie opposite one another in such a way that an air gap is delimited in each case. In other words, the first embodiment of the magnetic field sensitive component 10 has two air gaps. The magnetic field sensitive component 10 has a non-conductive layer 30. The magnetic field sensitive component 10 is layered and has layers 40, wherein each layer 40 has the same layer thickness. The magnetic field sensitive component 10 has a rectangular shape, in particular the outer contour and the inner contour have a rectangular shape.

[0115] A second embodiment of a magnetic field-sensitive component 10 with a through-opening and an axial extension according to Figure 2 essentially consists of a first magnetic field-sensitive component part 11 and a second magnetic field-sensitive component part 12. The first magnetic field-sensitive component 11 and the second magnetic field-sensitive component 12 are in contact with one another at the respective first cut surfaces 21 and the second cut surfaces 22, in particular in planar contact.

[0116] List of reference symbols

[0117] 10 Magnetic field sensitive component

[0118] 11 First magnetic field sensitive component part 12 Second magnetic field sensitive component part

[0119] 20 cutting surface

[0120] 21 First cutting surface

[0121] 22 Second cutting surface

[0122] 30 Non-conductive layer 40 layer

Claims

Patent claims 1. A magnetic field-sensitive component (10) with a through-opening and an axial extension, wherein the magnetic field-sensitive component (10) has at least one cross-sectional surface (20), wherein the cross-sectional surface (20) has a normal that is perpendicular to the axial extension of the magnetic field-sensitive component (10); the magnetic field-sensitive component (10) comprises a soft magnetic material, preferably a metallic glass; and the magnetic field-sensitive component (10) has a coercive field strength of less than or equal to 10 A / m, preferably a coercive field strength of less than or equal to 5 A / m and particularly preferably a coercive field strength of less than or equal to 3 A / m.

2. Magnetic field-sensitive component (10) according to claim 1, characterized in that the magnetic field-sensitive component (10) has a remanence of less than or equal to 0.7 T, preferably a remanence of less than or equal to 0.1 T and particularly preferably a remanence of less than or equal to 0.05 T.

3. Magnetic field-sensitive component (10) according to one of the preceding claims, characterized in that the magnetic field-sensitive component (10) has a magnetostriction with a relative change in length parallel to the magnetic field of less than or equal to 2 times 10⁻⁶. 6 exhibits, preferably of less than or equal to 1 time 10~ 6 and especially preferred by less than or equal to 0.5 times 10~ 6 .

4. Magnetic field-sensitive component (10) according to one of the preceding claims, characterized in that the at least one cross-sectional surface (20) of the magnetic field-sensitive component (10) a roughness Ra exhibiting a roughness of less than or equal to 12.5 pm, preferably a roughness R a of less than or equal to 6.3 pm and particularly preferably a roughness R a of less than or equal to 3.2 pm.

5. Magnetic field-sensitive component (10) according to one of the preceding claims, characterized in that the magnetic field-sensitive component (10) has at least partially an insulating layer, in particular an impregnating resin.

6. Magnetic field-sensitive component (10) according to one of the preceding claims, characterized in that the surface of the magnetic field-sensitive component (10) has at least partially a non-conductive layer (30), in particular a non-conductive layer comprising a plastic, preferably a non-conductive housing.

7. Magnetic field-sensitive component (10) according to one of the preceding claims, characterized in that the soft magnetic material has a nanocrystalline structure.

8. Magnetic field-sensitive component (10) according to one of the preceding claims, characterized in that the soft magnetic material has the following atomic composition: [Fei- a Ni a ] ioo-xyza-ß-Y Cu x SiyB z NboM' ßM" Y with a < 0.3, 0, 6 < x < 1.5, 10 < y < 17, 5 < z < 14, 2 < a < 6, ß < 7, y < 8, where M' is at least one of the elements V, Cr, Co, Al and Zn, where M" is at least one of the elements C, Ge, P, Ga, Sb, In and Be.

9. Magnetic field-sensitive component (10) according to one of the preceding claims, characterized in that the magnetic field-sensitive component (10) has a fill factor of greater than or equal to 0.7, preferably greater than or equal to 0.75 and particularly preferably greater than or equal to 0.

8.

10. Magnetic field-sensitive component (10) according to one of the preceding claims, characterized in that the magnetic field-sensitive component (10) has more than 1 layer (40), preferably more than 5 layers (40) and particularly preferably more than 10 layers (40).

11. Magnetic field-sensitive component (10) according to claim 10, characterized in that the at least one layer (40) of the magnetic field-sensitive component (10) has a layer thickness of less than or equal to 25 pm, preferably less than or equal to 20 pm and particularly preferably less than or equal to 15 pm.

12. Use of a magnetic field-sensitive component (10) according to one of the preceding claims for a transformer.

13. Use of a magnetic field-sensitive component (10) according to any one of claims 1 to 11 as a choke.

14. Use of an inductive component (10) according to any one of claims 1 to 11 as a current transformer.

15. Transformer comprising a magnetic field-sensitive component (10) according to any one of claims 1 to 11.

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