Magnetic field sensitive assemblies, inductive components, methods and uses

Abstract

The present invention relates to a magnetic field sensitive assembly, comprising: an annular magnetic field sensitive element (110) and at least one bridge-like magnetic field sensitive element (120) housed in a housing (100); the annular magnetic field sensitive element has a through opening, an inner cylindrical surface, and an outer cylindrical surface; the housing has at least one first through-portion extending through the housing in the through-opening of the annular magnetic field sensitive element; and the magnetic field sensitive assembly has at least one clamping means (105) configured to clamp the bridge-like magnetic field sensitive element within the annular magnetic field sensitive element. Furthermore, the present invention relates to an inductive element, a method for manufacturing the magnetic field sensitive element and uses of the magnetic field sensitive element.

Description

[Technical Field]

[0001] The present invention relates to magnetic field sensitive assemblies, inductive components, methods and uses.

[0002] Inductive components, in particular chokes, are used in many electronic and / or electrical applications, in particular for limiting the current in electrical lines, for intermediate storage of energy in the form of magnetic fields, for impedance matching and / or for filtering electronic and / or electrical signals. [Background technology]

[0003] When an inductive component is used as an interference suppression choke, it is necessary that direct currents and low-frequency currents are not or only slightly affected by the choke, while high-frequency alternating currents must be effectively reduced by utilizing the impedance of the inductance.

[0004] Typically, connecting lines in a DC system each have a send line and a return line. Interference currents occurring on such lines can be divided into common-mode interference currents and normal-mode interference currents. Common-mode interference currents, also known as in-phase interference currents, are interference currents on connecting lines between electrical components or parts that occur in the same direction on both the send and return lines. Normal-mode interference currents, also known as differential-mode interference currents, on the other hand, propagate in opposite directions on the connecting lines.

[0005] Up to now, in corresponding DC power supplies, it has been necessary to use separate components, in particular chokes, to filter or attenuate normal mode and common mode interference currents, which has proven effective in principle, but which may be considered a disadvantage that the corresponding assemblies are relatively complex and require a relatively large installation space.

[0006] Particularly in mobile applications and / or other space- and cost-critical applications, it is desirable to design the required tasks as space-saving, cost-effective and robustly as possible, in addition to which good filtering effect against high-frequency interference currents, a temperature that is as constant as possible and good suitability for the specified application are further desirable. Summary of the Invention [Problem to be solved by the invention]

[0007] The problem on which the present invention is based is to provide an improvement or alternative to the prior art. [Means for solving the problem]

[0008] According to a first aspect of the invention, the subject is a magnetic field sensitive assembly comprising: - comprising an annular magnetic field sensitive element and at least one bridge-shaped magnetic field sensitive element housed in a housing, the annular magnetic field sensitive element has a longitudinal extension and a centrally arranged through-opening extending in the longitudinal extension direction, the through-opening having an elliptical cross section with two axes of symmetry; the annular magnetic field sensitive element has an inner cylindrical surface and an outer cylindrical surface; - the bridge-shaped magnetic field sensitive element is formed in a rectangular parallelepiped shape, has a bottom surface and a top surface, and is disposed within the through-hole, the bottom surface and the top surface being disposed to correspond to the inner cylindrical surface; the housing has at least one first through-portion extending through the housing within the through-opening of the annular magnetic field sensitive component; The solution is provided by a magnetic field sensitive assembly, which has at least one clamping means configured to clamp a bridge-like magnetic field sensitive part within an annular magnetic field sensitive part.

[0009] The present invention is based on the basic idea of ​​providing a magnetic field sensitive assembly that can effectively filter or attenuate both common mode and normal mode interference currents.

[0010] The annular magnetic field sensitive component is optimized to attenuate or cancel common-mode interference currents in particular. In this case, the cancellation is preferably achieved by superimposing the common-mode interference currents on the magnetic flux. Typically, power lines are guided in opposing regions around the annular magnetic field sensitive component or through respective penetrations, so that the common-mode interference currents each generate magnetic flux in the annular component. The magnetic fluxes can be superimposed, thereby canceling them out. As a result, the common-mode interference currents are filtered by the magnetic field sensitive assembly.

[0011] In contrast, bridge-shaped magnetic field sensitive elements are primarily used to attenuate normal mode interference currents, and for this purpose, bridge-shaped magnetic field sensitive elements preferably have a significantly lower magnetic permeability but a significantly higher coercivity than annular magnetic field sensitive elements.

[0012] The assembly according to the invention is able to efficiently attenuate or filter out both common-mode and normal-mode interference currents, thus eliminating the need for separate assemblies, preferably formed as chokes, for the two types of interference currents, thereby optimizing the electrical system in terms of installation space, weight and costs.

[0013] By clamping the bridge-shaped magnetic field sensitive element into the annular magnetic field sensitive element, the two elements are able to rest particularly flush against each other. This prevents air gaps between the elements, which could adversely affect the properties of the magnetic field sensitive assembly. This clamping of the bridge-shaped magnetic field sensitive element into the annular magnetic field sensitive element also compensates for manufacturing tolerances, particularly in the annular element. Furthermore, assembly of the magnetic field sensitive assembly is simplified, since the bridge-shaped element can be inserted with some play into the through-opening of the annular element before being clamped. The absence of gaps between the bridge-shaped and annular magnetic field sensitive elements defines the magnetic properties of the assembly, thereby increasing the reproducibility of the damping effect. At the same time, length changes due to temperature fluctuations during operation are also compensated for.

[0014] In this regard, the following terms are explained. First, it is expressly pointed out that within the scope of this patent application, indefinite articles and numerical indications such as "one", "two", etc. are generally to be understood as "minimum" indications, i.e. as "at least one", "at least two", etc., unless it is clear from the respective context or obvious to a person skilled in the art or technically necessary that they can only mean "exactly one", "exactly two", etc.

[0015] Within the scope of this patent application, the expression "in particular" should always be understood to introduce optional and preferred features, and should not be understood in the sense of "and" and "i.e."

[0016] By "magnetic field sensitive component" is understood a component, in particular a ferromagnetic component, which reacts to a magnetic field by changing at least one state variable of the component. From the magnetic field sensitive component, inductive components can be produced which can be used in particular together with conductive conductors for electrical and / or electronic applications.

[0017] An "ellipse" is a flat, rounded, convex shape. Ellipses include the circle and the ellipse as special cases, and in contrast, an ellipse need not have an axis of symmetry. In particular, an ellipse is a twice-continuously differentiable closed convex curve in the plane.

[0018] If an elliptical curve is placed as a mirror image on both sides of an imaginary line, the ellipse will have an axis of symmetry. If an elliptical curve is placed as a mirror image on both sides of two non-coincident imaginary lines, the ellipse will have two axes of symmetry. In particular, a circle and an oval are ellipses each with two axes of symmetry.

[0019] The annular magnetic field sensitive component can be formed in a circular ring shape, in which case the through opening has a circular cross section. Alternatively, the annular magnetic field sensitive component can include two opposing straight sections extending parallel to each other and connected to each other by a semicircular arc. Preferably, the annular magnetic field sensitive component has an at least substantially constant, in particular rectangular, cross section over its entire circumference.

[0020] The annular magnetic field-sensitive element can extend in the longitudinal direction over a length of at least 15 mm, in particular at least 20 mm, preferably at least 25 mm, particularly preferably at least 35 mm, and / or at most 100 mm, in particular at most 75 mm, preferably at most 60 mm, particularly preferably at most 40 mm. The opening width of the through-opening, especially in the part of the through-opening where the bridge-shaped magnetic field-sensitive element is arranged, can be at least 8 mm, in particular at least 12 mm, preferably at least 15 mm and / or at most 50 mm, in particular at most 40 mm, preferably at most 30 mm. An opening width of 20 mm is particularly preferred.

[0021] Such dimensions have been found to be advantageous for the attenuation properties of the magnetic field sensitive assembly, in particular for filtering common mode interference currents. The dimensions can be adjusted to suit each specific application.

[0022] By "through opening" is understood a free cross section formed in the inner region of the magnetic field sensitive component. Preferably, the through opening extends in the direction of axial extension of the magnetic field sensitive component.

[0023] A "housing" is understood to be a component that electrically and / or electronically insulates at least the annular and / or bridge-like magnetic field sensitive components from their surroundings. Furthermore, the housing can be configured to accommodate at least the annular and / or bridge-like magnetic field sensitive components and to allow the accommodated components to be positioned relative to one another. In other words, the housing can influence the relative positions of the annular and / or bridge-like magnetic field sensitive components.

[0024] The housing may consist of or include plastic, in particular thermoplastic and / or thermosetting plastic.

[0025] Advantageously, the housing is or can have been manufactured from thermoplastic and / or thermosetting plastics by injection molding and / or thermoforming and / or PUR-RIM and / or other plastic manufacturing methods.

[0026] The housing may at least partially surround, in particular completely surround, the annular and / or bridge-shaped magnetic field sensitive element.

[0027] Preferably, the housing is resistant to temperatures of 120°C or higher, preferably 150°C or higher, particularly preferably 180°C or higher.

[0028] A "penetration" of a housing is understood to mean a free cross-section extending through the housing. The penetration may have an elliptical cross-section, preferably an oblong or circular cross-section, or any other cross-section, in particular a D-shaped or semicircular cross-section. The penetration may pass completely through the housing. In other words, the specified electrical conductor may pass through the housing through the penetration.

[0029] The penetrations extend along parallel axes within the housing, and preferably pass through the housing in a longitudinal direction.

[0030] Advantageously, the axis of the through opening of the first magnetic field sensitive component can extend at least partially coaxially with the axis of the first penetration of the housing, which makes it even easier to guide the designated electrical conductor through the through opening of the first magnetic field sensitive component and the first penetration of the housing.

[0031] According to another embodiment of the present invention, the housing may have at least one first through-portion and one second through-portion extending through the housing on both sides of the bridge-shaped magnetic field sensitive component and within the through-opening of the annular magnetic field sensitive component.

[0032] Thereby, it can be provided that the electrical conductor is guided through the penetration, in particular around the annular magnetic field sensitive component adjacent to the penetration, so that an interference current can induce a magnetic flux in the annular magnetic field sensitive component.

[0033] Advantageously, the bridge-like magnetic field sensitive component is formed in one piece.

[0034] The bridge-shaped magnetic field sensitive element can be formed as a single piece, which prevents interference of magnetic fluxes between adjacent components, but in principle it is also conceivable to form a bridge-shaped magnetic field sensitive element in a multi-piece configuration, in particular with a plurality of components each preferably having a rectangular parallelepiped basic shape and extending parallel to one another.

[0035] The bridge-shaped magnetic field sensitive element can be in contact with the annular magnetic field sensitive element at its bottom and top surfaces, which preferably form two opposing end surfaces. Therefore, the bottom and top surfaces can be formed as flat surfaces, especially when the bridge-shaped magnetic field sensitive element is in contact with the corresponding straight portion of the annular magnetic field sensitive element. Alternatively, the bottom and top surfaces can be formed as concave surfaces, especially as segments of a cylindrical surface. Such an embodiment is recommended when the annular magnetic field sensitive element is formed in a circular ring shape.

[0036] Preferably, the bridge-like element has a rectangular cross section. Preferably, the bridge-like magnetic field sensitive element is formed so that there are no abrupt cross-sectional transitions, particularly transverse to the longitudinal extension direction. In particular, the bridge-like magnetic field sensitive element has only continuous cross-sectional transitions, which are preferably rounded. Particularly preferably, the bridge-like magnetic field sensitive element has a constant cross section transverse to the longitudinal extension direction. This allows for advantageous magnetic flux through the bridge-like magnetic field sensitive element. The bridge-like magnetic field sensitive element can be flush with the annular magnetic field sensitive element in the longitudinal extension direction.

[0037] The bridge-shaped magnetic field sensitive element may extend transversely to the longitudinal direction over a width of at least 7 mm, in particular at least 9 mm, preferably at least 12 mm, and / or at most 25 mm, in particular at most 18 mm, preferably at most 16 mm, particularly preferably 14 mm or 15 mm.

[0038] Such dimensions have been found to be advantageous for the attenuation characteristics of the magnetic field sensitive assembly, particularly for attenuation of normal mode interference currents. The dimensions can be adjusted to suit each specific application.

[0039] According to a preferred embodiment, the housing is at least two-piece, in particular exactly two-piece. Preferably, the housing comprises a housing dish and a housing cover.

[0040] The advantage of such a structure is that it is easy to assemble, since the two housing parts can be simply connected to each other after inserting the annular magnetic field sensitive part and the bridge-shaped magnetic field sensitive part into one of the two housing parts, preferably into the housing dish.

[0041] In this case, the housing dish may include a base plate covering the longitudinal end faces of the annular and / or bridge-shaped magnetic field sensitive components, from which a circumferential side wall may protrude, which covers at least the annular magnetic field sensitive component, preferably its outer cylindrical surface.

[0042] The housing cover may therefore include a cover plate covering the longitudinal end faces of the annular and / or bridge-shaped magnetic field-sensitive elements located on the opposite side of the base plate. The housing stool and / or the housing cover may be provided with engagement means, which may be used to connect the housing stool and the housing cover to one another in a form-fitting manner. Specifically, the engagement means may comprise, in particular, circumferential positioning projections formed on the housing cover, which abut against the free ends of the side walls of the housing stool to position the housing cover relative to the housing stool. Preferably, the positioning projections abut against the free ends of the side walls of the housing stool from the outside. This allows the positioning projections to absorb counterforces against the clamping force, especially if clamping means are formed on the side walls of the housing stool.

[0043] Furthermore, the housing dish or the housing cover may be formed with an inner side wall(s) that defines or surrounds at least one opening. The other of the two housing elements may be provided with a corresponding positioning protrusion, particularly formed in the circumferential direction, for supporting the inner side wall. Such engagement, preferably realized on both the outer and inner side walls, allows for high mechanical stability of the housing. Each portion of each side wall abuts against the bridge-shaped and / or annular magnetic field sensitive components and uniquely positions them relative to each other.

[0044] Furthermore, the housing cover and the housing pedestal can be held together by fastening means. It is conceivable that the housing cover and the housing pedestal are glued together in the region of the positioning projections and the side walls. It is also possible to provide a corresponding screw connection between the housing cover and the housing pedestal. Other forms of fastening means are also conceivable.

[0045] In another embodiment of the invention, the clamping means may be located within the housing.

[0046] The clamping means is therefore preferably supported between the side wall and the outer cylindrical surface of the housing.

[0047] Preferably, the clamping means acts on the outer cylindrical surface.

[0048] Therefore, it may be attempted to compress the annular magnetic field sensitive component from the outside in order to remove the play that exists between the annular magnetic field sensitive component and the bridge-like magnetic field sensitive component during assembly.

[0049] The clamping means are preferably designed to be pressed against each other on opposing sides of the annular magnetic field sensitive component, elastically deform, and clamp the bridge-like magnetic field sensitive component disposed therebetween. In other words, the clamping means can slightly reduce the opening width of the through-opening in order to clamp the bridge-like magnetic field sensitive component disposed therebetween. This ensures that no gap exists between the annular component and the bridge-like component, which would minimize the effectiveness of the bridge-like magnetic field sensitive component. In this case, the clamping means can pre-press the annular magnetic field sensitive component, in other words, can exert a pre-force on the annular magnetic field sensitive component. In this case, the pre-force is selected so that any play present between the bridge-like component and the annular component during assembly is eliminated.

[0050] According to another embodiment, the clamping means may have a fixed geometry.

[0051] In other words, the side walls of the housing can be provided with shape-stable shapings or corresponding shape-stable clamping elements in order to fasten the bridge-shaped magnetic field sensitive part to the annular magnetic field sensitive part.

[0052] The clamping means can be formed as a component of the housing, in particular as a component of the housing dish.

[0053] For example, the clamping means may include a protrusion formed on a side wall of the housing, which protrusion presses against the outer cylindrical surface from the outside. Preferably, two opposing side walls are formed with corresponding clamping protrusions facing inward.

[0054] It is also possible to form the clamping means as a separate clamping element independent of the housing. This embodiment has the advantage that, as with shim rings, the clamping element can be selected according to the dimensions present in the respective specific annular magnetic field-sensitive component in order to generate a precisely defined clamping force. Corresponding attachment means, preferably acting in a force-locking and / or form-locking manner, can be provided to hold the clamping element on the housing.

[0055] The clamping means may have a curvature formed querab the longitudinal extension.

[0056] Such curvature or clamping protrusion reduces notch stresses, which has a beneficial effect on magnetic properties.

[0057] Alternatively, the clamping means may have a curved and / or wedge-shaped inclined surface formed in the longitudinal extension direction.

[0058] This reduces stresses that occur when the housing petri dish and the housing cover are connected to each other from both sides during assembly of the housing. The wedge-shaped inclined surface can be provided on the side wall of the housing, and the wedge-shaped inclined surface extends only over a partial area of ​​the longitudinal extension of the annular magnetic field sensitive component. In other words, in this case, the clamping means acts only on the longitudinal cross section of the annular magnetic field sensitive component. This reduces stresses that occur during assembly, which makes it easier to join the housing.

[0059] In another embodiment, the clamping means may be an adjustable clamping means.

[0060] One advantage of such adjustable clamping means is that the clamping force can be precisely adjusted. Due to manufacturing tolerances, the distance between the opposing sides of the annular magnetic field sensitive component can vary. Such adjustable clamping means can allow for individual adjustment of the clamping force. For example, a clamping screw can be provided that is movably held in the housing, which can exert a compressive force on the annular magnetic field sensitive component from the outside.

[0061] According to a preferred embodiment, the bridge-shaped magnetic field sensitive component can have a relative permeability of 10 or more, preferably a relative permeability of 50 or more, more preferably a relative permeability of 100 or more, and particularly preferably a relative permeability of 300 or more. Purposefully, the bridge-shaped magnetic field sensitive component can have a relative permeability of 500 or more, preferably a relative permeability of 1000 or more, more preferably a relative permeability of 1500 or more, and particularly preferably a relative permeability of 2000 or more.

[0062] "Magnetic permeability" is a measure of the magnetization of a material in an external magnetic field. The higher the magnetic permeability of a magnetic field-sensitive component, the greater the ratio of the magnetic flux density in the magnetic field-sensitive component to the magnetic field strength of the magnetic field acting on the magnetic field-sensitive component. A magnetic field-sensitive component with high magnetic permeability will have a relatively high magnetic flux density in the magnetic field-sensitive component even when the magnetic field strength is low.

[0063] The above values ​​of relative permeability can be used to influence the specified magnetic flux flow of the bridge-like magnetic field sensitive component in an advantageous range.

[0064] This makes it possible to achieve that a magnetic field sensitive assembly using inductive components can be optimized to attenuate normal mode interference currents (due to the material properties of the bridge-like components) in addition to attenuating common mode interference currents (due to the material properties of the annular components).Usually, the attenuation of common mode interference currents and the attenuation of normal mode interference currents are achieved by separate inductive components, so the inductive components proposed here can achieve overall functional integration.

[0065] Optionally, the bridge-shaped magnetic field sensitive component may have a relative permeability of 5000 or less, preferably 3500 or less, more preferably 2000 or less, and particularly preferably 1500 or less.

[0066] Preferably, the bridge-shaped magnetic field sensitive component has a relative permeability of 1000 or less, preferably 500 or less, more preferably 300 or less, and particularly preferably 100 or less.

[0067] The bridge-shaped magnetic field sensitive component can have a coercive force of 12 A / m or more, preferably 120 A / m or more, and particularly preferably 1200 A / m or more.

[0068] Such coercivity assists in the attenuation of normal mode interference currents. "Coercivity" is understood to be the strength of the magnetic field required to completely demagnetize a magnetic field sensitive member that has previously been charged to saturation flux density.

[0069] According to a preferred embodiment of the invention, the bridge-shaped magnetic field sensitive component is manufactured from, and in particular sintered from, a soft magnetic material.

[0070] By "soft magnetic material" is understood a material that can be easily magnetized in a magnetic field. Preferably, the soft magnetic material has a coercivity of less than or equal to 1000 A / m.

[0071] Preferably, the soft magnetic material, in particular the amorphous soft magnetic material, preferably a metallic glass, comprises an alloy containing iron, nickel and / or cobalt.

[0072] By "metallic glass" is understood a metal-based alloy of matter that has an amorphous rather than a crystalline structure at the atomic level, but nevertheless has metallic conductivity as a property. Preferably, metallic glasses may also contain non-metallic alloying components in addition to the metal alloying components.

[0073] The amorphous atomic arrangement, which is very rare in metals, advantageously enables special physical material properties, and in particular the use of metallic glasses can advantageously reduce the coercivity and / or increase the magnetic permeability of magnetic field sensitive components.

[0074] Preferably, the soft magnetic material has the following atomic composition: [Fe 1-a Ni a ] 100-x-y-z-α-β-γ Cu x Si y B z Nb α M'β M” γ and where a≦0.3, 0.6≦x≦1.5, 10≦y≦17, 5≦z≦14, 2≦α≦6, β≦7, γ≦8, M′ is at least one of the elements V, Cr, Al, and Zn, and M″ is at least one of the elements C, Ge, P, Ga, Sb, In, and Be.

[0075] More preferably, the soft magnetic material may contain 73.5% by weight of iron and / or 1% by weight of copper and / or 3% by weight of niobium and / or 13.5% by weight of silicon and / or 9% by weight of boron. Suitably, the soft magnetic material may contain 74.5% by weight of iron and copper, the proportion of copper being 1% by weight or less.

[0076] In another embodiment, the bottom and / or top surfaces of the bridge-like magnetic field sensitive component and / or at least part of the inner cylindrical surface of the annular magnetic field sensitive component can be polished. In particular, the corresponding surfaces have a roughness R of 1.6 μm or less. a , preferably a roughness R of 0.8 μm or less a , particularly preferably a roughness R of 0.4 μm or less a It can have:

[0077] "Roughness" refers to the unevenness of a surface height. There are various calculation methods for quantitatively characterizing roughness, each of which takes into account different properties of the surface. a " or average roughness indicates the average distance from a measurement point on a surface to the center line.

[0078] Surface irregularities, such as notches, can cause obstacles to magnetic flux. Low roughness on the bottom and / or top surfaces of the bridge-shaped magnetic field sensitive component and / or the inner cylindrical surface of the annular magnetic field sensitive component can reduce the adverse effect on magnetic flux flow caused by roughness on these very surfaces. Therefore, the reproducibility of the characteristics of the magnetic field sensitive assembly can be improved.

[0079] It is expedient for the annular magnetic field sensitive element to have a relative permeability of 1000 or more, preferably 5000 or more, more preferably 10000 or more, particularly preferably 20000 or more.

[0080] Further suitably, the annular magnetic field sensitive component can have a relative permeability of 30,000 or more, preferably 45,000 or more, more preferably 60,000 or more, and particularly preferably 75,000 or more.

[0081] The above suggested relative permeability values ​​of the annular magnetic field sensitive component allow for improved compensation of high frequency common mode interference currents induced on the load or power supply side.

[0082] According to an optional embodiment, the annular magnetic field sensitive component may have a relative permeability of 150,000 or less, preferably 100,000 or less, more preferably 90,000 or less, and particularly preferably 75,000 or less. Further, the annular magnetic field sensitive component may suitably have a relative permeability of 60,000 or less, preferably 45,000 or less, more preferably 30,000 or less, and particularly preferably 20,000 or less. The permeability is preferably measured in a magnetic field oscillating at 50 Hz.

[0083] Advantageously, the annular magnetic field sensitive component can have a magnetic saturation flux density of at least 1 T, preferably at least 1.2 T, particularly preferably at least 1.4 T. This makes it possible to achieve that, during a given use as an inductive component of a magnetic field sensitive assembly, the annular magnetic field sensitive component does not enter saturation even in the case of relatively large interference currents.

[0084] "Saturation magnetic flux density" is a measure of the maximum magnitude to which a material can be magnetized by an applied magnetic field. The magnetic flux density initially increases continuously with increasing magnetic field strength. From a certain value, this effect diminishes significantly, so that continued increases in magnetic field strength only result in a small increase in the magnetic flux density of the material. The magnetic flux density at which this flattening occurs is called the saturation magnetic flux density.

[0085] Advantageously, the annular magnetic field sensitive component can have a coercive force of 10 A / m or less, preferably 5 A / m or less, and particularly preferably 3 A / m or less. This reduces the heat loss caused by the AC magnetic field in the annular magnetic field sensitive component. In this way, the annular magnetic field sensitive component can be further miniaturized while maintaining the same common-mode interference current, thereby further increasing the power density of the magnetic field sensitive assembly.

[0086] Preferably, the annular magnetic field sensitive component comprises a soft magnetic material, in particular a metallic glass, preferably comprising a nanocrystalline structure.

[0087] The annular magnetic field-sensitive component can be layered from a soft magnetic material, and in particular, the magnetic field-sensitive component can be wound from a soft magnetic material. This can affect the eddy current loss of the magnetic field-sensitive component. Preferably, the eddy current loss can be precisely adjusted via the eddy current loss of the soft magnetic material, thereby adjusting the eddy current loss and therefore the impedance of the magnetic field-sensitive component. In other words, the eddy current loss and impedance can be adjusted via the strip thickness. The impedance of the magnetic field-sensitive component can 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 achieve partial or complete dissipation of high-frequency currents, in particular high-frequency interference currents, by the magnetic field-sensitive component.

[0088] The annular magnetic field-sensitive component can in particular be wound circumferentially from a strip, in which case the strip thickness can be at least 5 μm, in particular at least 10 μm, preferably at least 15 μm, and / or at most 200 μm, in particular at most 100 μm, preferably at most 25 μm. A strip thickness of 20 μm is particularly preferred.

[0089] The total number of turns can be at least 100, in particular at least 250, preferably at least 400, and / or at most 1500, in particular at most 1000, preferably at most 600. Particularly preferably, the annular magnetic field sensitive component comprises 500 turns.

[0090] Such a wound annular magnetic field-sensitive component is subject to relatively high manufacturing tolerances, particularly with regard to the opening width of the through-opening, which can be compensated for accordingly by the clamping means.

[0091] Advantageously, the relative permeability of the annular magnetic field sensitive element can be at least 1.1 times, in particular at least 10 times, preferably at least 100 times, particularly preferably at least 1000 times greater than the relative permeability of the bridge-shaped magnetic field sensitive element.

[0092] A magnetic field sensitive assembly formed in this way reacts particularly quickly to high frequency alternating currents, thereby enabling further improved compensation of interference currents induced on the load side and / or on the power supply side.

[0093] In a magnetic field sensitive assembly, particularly with respect to a bridge-shaped magnetic field sensitive component, if the bridge-shaped magnetic field sensitive component and the annular magnetic field sensitive component are arranged at a distance from each other and a gap, in particular an air gap, is provided on the head side of the bridge-shaped magnetic field sensitive component opposite the annular magnetic field sensitive component, the magnetic permeability can be specified or adjusted more specifically by the user and in that sense more individually.

[0094] The head side is understood to mean the designated arrangement of the bridge-like magnetic field sensitive element within the annular magnetic field sensitive element, and each side of the bridge-like magnetic field sensitive element that is arranged to correspond to the inner peripheral surface of the annular magnetic field sensitive element.

[0095] The gap can be understood here as the distance between the bridge-like magnetic field sensitive element and the annular magnetic field sensitive element. This gap can be filled with ambient air or with another medium that fills the gap, in particular with a solid that separates the bridge-like magnetic field sensitive element from the bridge-like magnetic field sensitive element through the function of the spacer element inside the annular magnetic field sensitive element. In this way, the permeability of the gap can be adapted, in particular the gap can have the permeability of air and / or the permeability of the spacer element. In this case, a material with a low permeability, in particular air, is considered compared to the bridge-like magnetic field sensitive element and / or the annular magnetic field sensitive element.

[0096] Preferably, the gap may comprise magnetic powder, especially magnetic powder dispersed in plastic or other suitable material.

[0097] This allows the effective permeability of the magnetic short circuit of the annular magnetic field sensitive element caused by the bridge-shaped magnetic field sensitive element to be modified and / or adapted to the individually specified conditions of use of the magnetic field sensitive assembly proposed here, thereby making it possible to adjust, among other things, the filtering of common mode interference currents and / or normal mode interference currents.

[0098] Of course, the magnetic field sensitive assembly proposed herein may also have gaps between the bridge-like magnetic field sensitive component and the annular magnetic field sensitive component on both sides of the bridge-like magnetic field sensitive component and / or on all head sides of the bridge-like magnetic field sensitive component within the annular magnetic field sensitive component, particularly on two or more head sides, and it should be noted that in this case, the corresponding gaps may be filled with different media and / or materials.

[0099] Advantageously, the gap can be filled with a solid, in particular a hardened adhesive, which fixes the bridge-like magnetic field sensitive element to the annular magnetic field sensitive element.

[0100] According to a second aspect of the present invention, the above problem is solved by an inductive component comprising a magnetic field sensitive assembly according to the first aspect of the present invention, wherein the housing has at least first and second penetrations and first and second conductors extending through the housing on either side of the bridge-like magnetic field sensitive component and within the penetration opening of the annular magnetic field sensitive component; - the first conductor is passed through the first penetration at least once; The second conductor is passed through the second penetration at least once.

[0101] Needless to say, the advantages of the magnetic field sensitive assembly according to the first aspect of the invention extend directly to inductive components comprising the magnetic field sensitive assembly according to the first aspect of the invention, as described above.

[0102] The first conductor and / or the second conductor can be designed as a busbar.

[0103] It is expressly mentioned that the subject matter of the second aspect may be advantageously combined with the subject matter of the above aspects of the invention, both individually and cumulatively in any combination.

[0104] According to a third aspect of the present invention, the object is achieved by a method for manufacturing a magnetic field sensitive assembly as described above, comprising the following steps: - providing an annular magnetic field sensitive element; - providing a bridge-shaped magnetic field sensitive element; - clamping the bridge-shaped magnetic field sensitive element within the annular magnetic field sensitive element using a clamping means; The problem is solved by a method comprising the steps of:

[0105] It is expressly pointed out that the subject matter of the third aspect can be advantageously combined with the subject matter of the above aspects of the invention, both individually and cumulatively in any combination.

[0106] According to a fourth aspect of the present invention, the above problem is solved by the use of a magnetic field sensitive assembly according to the first aspect of the present invention as an inductive component, in particular for reducing common mode interference currents and / or normal mode interference currents.

[0107] Needless to say, the advantages of the magnetic field sensitive assembly according to the first aspect of the invention extend directly to the use of the magnetic field sensitive assembly according to the first aspect of the invention as an inductive component, as described above.

[0108] Advantageously, the magnetic field sensitive assembly can be used as an inductive component in a power supply system, preferably a DC power supply system, particularly preferably a DC power supply system for powering a battery electrical storage.

[0109] The power supply system can be configured as a charger, in particular as a charger for vehicles with battery electrical storage, preferably for battery electric vehicles (BEVs), more preferably for battery electric commercial vehicles.

[0110] Alternatively, the power supply system, in particular a DC power supply system, can be configured to supply power to an electrical consumer, in particular an electric drive unit, preferably an electric motor, in particular an electric motor of a vehicle.

[0111] The power supply system may comprise at least one frequency converter.

[0112] It is expressly mentioned that the subject matter of the fourth aspect may be advantageously combined with the subject matter of the above aspects of the invention, both individually and cumulatively in any combination. Further advantages, details and features of the invention will become apparent from the examples described below. [Brief explanation of the drawings]

[0113] [Figure 1] 1 is a plan view of an inductive component with a magnetic field sensitive assembly according to the present invention; [Figure 2] 2 is a longitudinal section of the magnetic field sensitive assembly of FIG. 1, the clamping means being only diagrammatically shown; [Figure 3] 2 is a cross-sectional view of the magnetic field sensitive assembly of FIG. 1 along section line AA, the clamping means being only diagrammatically shown; [Figure 4] 2 is a detailed cross-sectional view of the assembly of FIG. 1 according to a first embodiment of the clamping means; [Figure 5] 5 is another cross-sectional view of the magnetic field sensitive assembly of FIG. 4 along section line AA. [Figure 6] 2 is a cross-sectional view of the assembly of FIG. 1 along section line AA according to a second embodiment of the clamping means; [Figure 7] 2 is a cross-sectional view of the assembly of FIG. 1 according to a third embodiment of the clamping means; [Figure 8] 1 according to a fourth embodiment of the clamping means; FIG.

[0114] In the following description, the same reference numerals denote the same components or features, so that a description of a component made with reference to one figure applies to the other figures, thereby avoiding repetitive description. Furthermore, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0115] 1 shows an inductive component 20 according to the present invention. It comprises a magnetic field sensitive assembly 10 having a housing 100 including a first penetration 101 and a second penetration 102. Both penetrations 101, 102 are D-shaped. A first conductor 201 passes through the first penetration 101, and a second conductor 202 passes through the second penetration 102.

[0116] In that case, the basic structure of a magnetic field sensitive assembly 10 according to the invention is shown in FIGS.

[0117] The magnetic field sensitive assembly 10 has an annular magnetic field sensitive part 110 having a longitudinal extension 111 and a centrally located through-opening 112 extending in the longitudinal extension 111, which here has a cross section formed as an ellipse with two axes of symmetry. Specifically, the annular magnetic field sensitive part 110 includes two opposing straight portions 115 extending parallel to each other and connected to each other by a semicircular arc 116. The annular magnetic field sensitive part 110 has a constant square cross section over its entire circumference.

[0118] The annular magnetic field sensitive component 110 therefore has an inner cylindrical surface 113 and an outer cylindrical surface 114. The inner cylindrical surface 113 is polished and has a roughness R a is approximately 0.4 μm.

[0119] Here, the annular magnetic field sensitive element 110 consists of a soft magnetic material formed as a metallic glass, which is wound circumferentially from a strip. The strip thickness is about 20 μm, and the annular magnetic field sensitive element includes a total of 500 turns. The soft magnetic material here has a relative permeability of more than 30,000 and a coercive force of less than 3 A / m.

[0120] The magnetic field sensitive assembly 10 further includes a bridge-like magnetic field sensitive part 120 formed in the shape of a rectangular parallelepiped. This is integrally formed and has a flat bottom surface 121 and a flat top surface 122, which form two mutually opposing end surfaces. The bottom surface 121 and the top surface 122 are formed flat and have a roughness R a It is polished to a thickness of approximately 0.4 μm.

[0121] The bridge-like element 120 is disposed in the through-opening 112 of the annular magnetic field sensitive element 110, and its bottom surface 121 and top surface 122 are respectively flush with the inner cylindrical surface 113 of the annular magnetic field sensitive element 110. The bridge-like magnetic field sensitive element 120 is flush with the longitudinal end surfaces of the annular magnetic field sensitive element 110 on both sides in the longitudinal extension direction.

[0122] The bridge-shaped magnetic field sensitive component 120 is sintered from a soft magnetic material, which here has a coercive force of about 1200 A / m and a relative permeability of less than 100.

[0123] The annular magnetic field sensitive element 110 and the bridge-shaped magnetic field sensitive element 120 are completely enclosed by a plastic housing 100, where the plastic is selected to be temperature resistant above 180°C.

[0124] Specifically, the housing 100 includes a housing dish 103 and a housing cover 104 that are connected to each other.

[0125] The housing petri dish 103 has a base plate 106 that covers the longitudinal end faces of the annular magnetic field sensitive component 110 and the bridge-shaped magnetic field sensitive component 120. Circumferential side walls 107 protrude from this base plate 106 and cover the annular magnetic field sensitive component 110, specifically its outer cylindrical surface 114. Inner side walls 107 that define the through-holes 101 and 102 protrude from the base plate 106 and cover the inner cylindrical surface 113 and the side surfaces of the bridge-shaped magnetic field sensitive component 110 that face the respective through-holes 101 and 102.

[0126] The housing cover 104 includes a cover plate 108, which covers the longitudinal end faces of the annular magnetic field sensitive element 110 and the bridge-shaped magnetic field sensitive element 120 located on the opposite side of the base plate 106. The housing petri dish 103 and the housing cover 104 are formed with engagement means, through which the housing petri dish 103 and the housing cover 104 are form-fittingly engaged with each other. The engagement means includes a circumferential positioning protrusion 109 formed on the housing cover 104, which abuts against the free end of the side wall 107 of the housing petri dish 103 to position the housing cover relative to the housing petri dish. In this case, the positioning protrusion 109 abuts against the free end of the side wall 107 of the housing petri dish 103 from the outside. Specifically, for this purpose, a positioning recess 109a corresponding to the positioning protrusion 109 is provided at the free end of the side wall 107, thereby tapering the free end of the side wall 107.

[0127] 2, it can be seen that small gaps are formed in the circumferential direction between the side wall 107 and the annular magnetic field sensitive component 110 or between the side wall 107 and the bridge-shaped magnetic field sensitive component 120. In particular, it is also conceivable that no such gap exists between the inner side wall 107 and the bridge-shaped magnetic field sensitive component 120, i.e., the side wall 107 abuts against the bridge-shaped magnetic field sensitive component 120 to uniquely position the bridge-shaped magnetic field sensitive component 120 relative to the annular magnetic field sensitive component 110.

[0128] Furthermore, the magnetic field sensitive assembly 10 has at least one clamping means 105, which is only indicated schematically in terms of its function by an arrow in Figures 2 and 3. The clamping means 105 is configured to clamp the bridge-shaped magnetic field sensitive part 120 into the annular magnetic field sensitive part 110. In this case, the clamping means acts on the outer cylindrical surface 114 of the annular magnetic field sensitive part 110. In other words, it applies a clamping force from the outside to the outer cylindrical surface 114 to clamp the bridge-shaped magnetic field sensitive part 120 arranged in the through-opening 112, whereby the annular magnetic field sensitive part 110, in particular its straight part 115, is compressed from the outside. In other words, the annular magnetic field sensitive part 110 is elastically deformed.

[0129] The clamping means 105 and the clamping force generated thereby ensure that the bottom surface 121 and top surface 122 of the bridge-like magnetic field sensitive component 120 lie flat against the inner cylindrical surface 113 of the annular magnetic field sensitive component 110 .

[0130] Various exemplary embodiments of the clamping means 105 are shown in detail in FIGS.

[0131] The first embodiment is shown in Figures 4 and 5. In this case, a corresponding clamping protrusion 105a is formed on the side wall 107 of the housing dish 103, which presses the annular magnetic field sensitive part 110 from the outside, thereby elastically deforming it inward, and the bridge-shaped magnetic field sensitive part 120 is clamped between the mutually facing parts of the inner cylindrical surface 113.

[0132] In this case, the clamping protrusions 105a extend over the entire length of the annular magnetic field sensitive component 110. During assembly, it is necessary to manually apply preload to the side walls 107 of the housing 100 before the housing cover 104 is placed on the housing dish 103 and the positioning protrusions 109 surround the side walls 107 from the outside.

[0133] 6 shows an alternative embodiment of the clamping means 105. In this case too, a clamping protrusion 105a is formed on the side wall 107 of the housing dish 103. However, this does not extend continuously over the entire length of the annular magnetic field sensitive component 110, but is formed wedge-shaped, so that it only acts on the longitudinal end regions of the annular magnetic field sensitive component 110. Such an embodiment facilitates assembly, since the annular magnetic field sensitive component 110 can initially be inserted into the housing dish 103 without any force resistance, and only at the end of this insertion can a clamping force be applied to the annular magnetic field sensitive component 110 by the wedge-shaped clamping protrusion 105a.

[0134] 7 shows another possible embodiment of the clamping means 105. In this case, in contrast to the two previous embodiments, the clamping means 105 is not formed as a component of the housing 100 but as a separate clamping element 105b. Such an embodiment has the advantage that, as in the case of shim rings, the clamping element 105b can be selected depending on the dimensions present in the respective specific annular magnetic field-sensitive component 110 in order to generate a precisely defined clamping force. Corresponding attachment means can be provided to hold the clamping element 105b on the housing 100, which preferably act in a force-locking and / or form-locking manner.

[0135] FIG. 8 shows another embodiment of the clamping means 105. In this case, the clamping means 105 is adjustable so that a defined force can be applied to the annular magnetic field sensitive component 110 from the outside. Specifically, in this case, the housing 100 is provided with a clamping screw 105c that is adjustably held on the side wall 107. For this purpose, a corresponding metal threaded insert (not shown in FIG. 8) can be provided in the housing 100. The front end face of the clamping screw 105c comes into contact with the outer cylindrical surface 114 of the annular magnetic field sensitive component 110, thereby allowing a defined clamping force to be applied to clamp the bridge-shaped magnetic field sensitive component 120.

[0136] The embodiments of the clamping means shown in Figures 4 to 8 may include the clamping means 105 as a whole or on opposite sides, respectively. In this case, the clamping means 105 described above may be combined with one another in any way. Other clamping means 105 not shown in detail are also conceivable.

[0137] By clamping the bridge-shaped magnetic field sensitive part 120 within the annular magnetic field sensitive part 110, air gaps between these parts are prevented, which has a positive effect on the properties of the magnetic field sensitive assembly 10.

[0138] Because the bridge-shaped magnetic field sensitive element 120 has a significantly lower magnetic permeability than the annular magnetic field sensitive element 110, but a significantly higher coercive force, the magnetic field sensitive assembly 10 is suitable for efficiently attenuating or filtering out both common mode and normal mode interference currents in the two conductors 201, 202. [Explanation of symbols]

[0139] 10 Magnetic field sensitive assembly 20 Inductive Components 100 Housing 101 First penetration 102 Second penetration 103 Housing Petri Dish 104 Housing cover 105 Clamping means 105a Clamp protrusion 105b clamping element 105c clamp screw 106 base plate 107 Side wall 108 Cover Plate 109 Positioning protrusion 109a Positioning recess 110 Annular magnetic field sensitive parts 111 Longitudinal direction of annular magnetic field sensitive component 112 Through-hole of annular magnetic field sensitive component 113 Inner cylindrical surface 114 outer cylindrical surface 115 Straight section 116 Semicircular Arc 120 Bridge-shaped magnetic field sensitive component 121 bottom 122 Top 201 First Conductor 202 Second Conductor

Claims

1. A magnetic field sensitive assembly (10), comprising: - comprising an annular magnetic field sensitive element (110) and at least one bridge-shaped magnetic field sensitive element (120) housed in a housing (100), - the annular magnetic field sensitive element (110) has a longitudinal extension (111) and a centrally arranged through-opening (112) extending in the longitudinal extension (111), the through-opening (112) having an elliptical cross section with two axes of symmetry; - said annular magnetic field sensitive element (110) has an inner cylindrical surface (113) and an outer cylindrical surface (114); - the bridge-shaped magnetic field sensitive element (120) is formed in a rectangular parallelepiped shape, has a bottom surface (121) and a top surface (122), and is arranged in the through-opening (112), and the bottom surface (121) and the top surface (122) are arranged to correspond to the inner cylindrical surface (113); - said housing (100) has at least one first through-portion (101) extending through said housing within said through-opening (112) of said annular magnetic field sensitive component (110); - said magnetic field sensitive assembly (10) comprising at least one clamping means (105) configured to clamp said bridge-like magnetic field sensitive part (120) within said annular magnetic field sensitive part (110).

2. 2. The magnetic field sensitive assembly of claim 1, wherein the housing (100) has at least one first through-portion (101) and one second through-portion (102) extending through the housing on both sides of the bridge-shaped magnetic field sensitive component (120) and within the through-opening (112) of the annular magnetic field sensitive component (110).

3. 3. The magnetic field sensitive assembly according to claim 1, wherein the bridge-like magnetic field sensitive part (120) is integrally formed.

4. The magnetic field sensitive assembly according to any one of claims 1 to 3, characterized in that the housing (100) is made up of at least two parts, in particular a housing dish (103) and a housing cover (104).

5. A magnetic field sensitive assembly according to any one of claims 1 to 4, characterized in that the clamping means (105) are arranged within the housing (100).

6. Magnetic field sensitive assembly according to any one of claims 1 to 5, characterized in that said clamping means (105) act on said outer cylindrical surface (114).

7. Magnetic field sensitive assembly according to any one of claims 1 to 6, characterized in that the clamping means (105) have a fixed geometry.

8. A magnetic field sensitive assembly according to any one of claims 1 to 7, characterized in that the clamping means (105) is formed as a component of the housing (100), in particular as a component of the housing dish (103).

9. A magnetic field sensitive assembly according to any one of claims 1 to 8, characterized in that the clamping means (105) have a curvature formed transverse to the longitudinal extension direction (111).

10. A magnetic field sensitive assembly according to any one of claims 1 to 9, characterized in that the clamping means (105) have curved and / or wedge-shaped inclined surfaces formed in the longitudinal extension direction (111).

11. A magnetic field sensitive assembly according to any one of claims 1 to 5, characterized in that the clamping means (105) are adjustable clamping means (105).

12. A magnetic field sensitive assembly according to any one of claims 1 to 11, characterized in that the bridge-shaped magnetic field sensitive part (120) has a relative permeability of 10 or more, preferably 50 or more, particularly preferably 100 or more.

13. A magnetic field sensitive assembly according to any one of claims 1 to 12, characterized in that the bridge-shaped magnetic field sensitive part (120) has a relative permeability of 5000 or less, preferably 3500 or less, particularly preferably 2000 or less.

14. A magnetic field sensitive assembly according to any one of claims 1 to 13, characterized in that the bridge-shaped magnetic field sensitive part (120) has a coercive force of 12 A / m or more, preferably 120 A / m or more, particularly preferably 1200 A / m or more.

15. Magnetic field sensitive assembly according to any one of claims 1 to 14, characterized in that the bridge-like magnetic field sensitive part (120) is made from a soft magnetic material, in particular sintered.

16. At least a part of the bottom surface (121) and / or the top surface (122) of the bridge-shaped magnetic field sensitive element (120) and / or the inner cylindrical surface (113) of the annular magnetic field sensitive element (110) has a roughness R of 1.6 μm or less. ａ , preferably a roughness R of 0.8 μm or less ａ , particularly preferably a roughness R of 0.4 μm or less ａ 16. The magnetic field sensitive assembly according to claim 1, characterized in that it is polished to a smooth finish.

17. A magnetic field sensitive assembly according to any one of claims 1 to 16, characterized in that the annular magnetic field sensitive part (110) has a relative permeability of 1000 or more, preferably 5000 or more, particularly preferably 10000 or more.

18. Magnetic field sensitive assembly according to any one of the preceding claims, characterized in that the annular magnetic field sensitive part (110) comprises a soft magnetic material, in particular a metallic glass, preferably a material with a nanocrystalline structure.

19. A magnetic field sensitive assembly according to any one of claims 1 to 18, characterized in that the relative permeability of the annular magnetic field sensitive element (110) is at least 1.1 times, in particular at least 10 times, preferably at least 100 times, and particularly preferably at least 1000 times greater than the relative permeability of the bridge-shaped magnetic field sensitive element (120).

20. An inductive component (20) comprising a magnetic field sensitive assembly (10) according to claim 2 or any one of claims 3 to 19 as far as it is dependent on claim 2, a first conductor (201) and a second conductor (202), - said first conductor (201) is passed through the first penetration (101) at least once; - an inductive component, wherein said second conductor (202) is passed through the second penetration (102) at least once.

21. A method for manufacturing a magnetic field sensitive assembly (10) according to any one of claims 1 to 19, comprising the following steps: - providing an annular magnetic field sensitive component (110); - providing a bridge-like magnetic field sensitive element (120); - clamping said bridge-like magnetic field sensitive element (120) within said annular magnetic field sensitive element (110) using clamping means (105); A method that encompasses

22. Use of a magnetic field sensitive assembly according to any one of claims 1 to 19 as an inductive component (20), in particular for reducing common mode and / or normal mode interference currents.

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