Inductor component and method for adjusting inductance

Abstract

The invention relates to an inductive component (1) comprising a winding (2) and at least one adjusting body (4, 4_1, 4_2, 4_n) for adjusting the inductance (L) of the inductive component (1), wherein the adjusting body (4, 4_1, 4_2, 4_n) comprises ferromagnetic material and surrounds at least some areas of the winding (2), wherein the inductance (L) is adjusted via the shape and / or position and / or number of the adjusting bodies (4, 4_1, 4_2, 4_n).

Description

Technical Field

[0001] The present invention relates to an inductive component and a method for adjusting the inductance of an inductive component. This may be a coil with a magnetic core or an air-core coil (i.e., a coil without a magnetic core). The inductive component is used, among other things, in stereo systems. Background Art

[0002] For many applications, it is necessary to precisely adjust the inductance value of a component, at least to the statistical average of a group of inductors (batch). Resonant applications in particular require highly accurate adjustment of the inductance.

[0003] The exact geometry, material properties, and operating temperature influence the inductance of an electrical component. Highly precise inductance values ​​can only be produced within certain physical limits and require, on the one hand, negligible temperature dependence of the material and, on the other, precise control of the geometry and material properties. Correcting deviations of the finished component's inductance from the desired target value is called "adjustment" or "tuning."

[0004] Documents DE 36 18 122 A1, DE 39 26 231 A1, DE 199 52 192 A1 and DE 10 2008 063312 A1 describe adjustable inductance components. Adjustment is usually achieved by pushing a core of soft magnetic material into or out of the interior of the winding, or by stretching or compressing the winding. Summary of the Invention

[0005] It is an object of the present invention to provide an improved inductive component and a method for adjusting the inductance of an inductive component.

[0006] According to a first aspect of the present invention, an inductive component comprises a winding and at least one tuning body for tuning the inductance of the inductive component, wherein the tuning body comprises ferromagnetic material and surrounds at least some areas of the winding.

[0007] In particular, at least some areas of the adjustment body are disposed in an area further from the winding axis of the winding than the outer side of the winding. In particular, the winding is at least partially disposed within the adjustment body. Thus, at least some areas of the adjustment body are disposed in a space external to the winding. In particular, the adjustment body does not extend into the interior of the winding and is therefore not configured as a magnetic core or as part of a magnetic core. The winding may also be disposed entirely within the adjustment body, or only edge areas of the winding may protrude from the adjustment body.

[0008] For example, the length of the adjustment body is similar to the length of the winding. The adjustment body can be shorter than the winding or longer by up to half the winding length. Therefore, since the longitudinal ends of the adjustment body at the ends of the winding are the dominant influence, a particularly good setting of the inductance can be achieved by moving the adjustment body out of the center position.

[0009] The magnetic field of the winding is directed through the ferromagnetic material of the adjustment body, resulting in the inductance of the adjustment component. The material of the adjustment body is preferably non-conductive or only slightly conductive. Therefore, no current is induced in the adjustment body to counteract the field generated by the winding. For example, the inductance can be maximized when the adjustment body is centered relative to the coil, and can be reduced when it is displaced.

[0010] For example, the adjustment body comprises ferrite or an iron alloy. The material of the adjustment body can be selected so that it is substantially temperature-independent. This means that temperature-independent adjustment is possible.

[0011] There may be only one adjustment body, or there may be a plurality of such adjustment bodies. A plurality of adjustment bodies will also be referred to as an adjustment assembly in the following text. The characteristics described for one adjustment body may also be applied by analogy to the adjustment assembly, or to a single adjustment body of an adjustment assembly.

[0012] In one embodiment, the winding is at least partially arranged in the adjustment body. For example, the adjustment body is configured as a hollow body. The adjustment body can be specifically configured as a ring or a sleeve.

[0013] The inductance of the component is adjusted via the shape and / or position of the adjustment body and / or the number of the adjustment bodies. In particular, the inductance can be fine-tuned by changing the shape, position and / or number of the adjustment body of the component.

[0014] The inductive component can include a so-called air-core coil. In this case, the component does not have a magnetic core inserted into the winding. In such an embodiment, the inductance can be adjusted particularly well via an external adjustment body. In an alternative embodiment, the inductive component can include a magnetic core, such as a ferrite core. In this case, the adjustment body is preferably configured separately from the ferrite core.

[0015] For example, the winding wire is configured as a flat wire. It can be copper wire. For example, the inductance of the component is between 1 nH and 1000 nH. Depending on the design, the inductance can be adjusted by up to 10% by changing the adjustment element.

[0016] In one embodiment, the component includes a plurality of such tuning bodies. For example, the tuning bodies form a sleeve-shaped tuning assembly, within which the winding is disposed. By combining tuning bodies of varying lengths, shapes, and material compositions, and by varying the number of tuning bodies, the inductance can be flexibly adjusted.

[0017] The adjustment body can have different lengths. Length is defined as the extension along the winding axis of the winding. Adjustment bodies can be added or removed to adjust the inductance. If the component's inductance value corresponds to the target value, the adjustment body can be fixed in place.

[0018] Alternatively or additionally, the adjustment body may have different diameters. The diameter is defined as the extension of the adjustment body perpendicular to the winding axis. To perform adjustments, one adjustment body can be replaced with another with a different diameter. Adjustment bodies with different geometries can also be combined. For example, adjustment bodies with circular, elliptical, and rectangular outer contours can be combined.

[0019] Alternatively or additionally, the tuning body may comprise a different ferromagnetic material.To perform tuning, one tuning body may be replaced by a tuning body comprising a different material.

[0020] To adjust the inductance, the number of adjustment bodies can be varied. A filler body made of non-magnetic material can also be replaced by an adjustment body, and vice versa. A filler body made of non-magnetic material can also be positioned between at least two adjustment bodies. For example, the filler body can comprise a plastic material.

[0021] In various embodiments, the adjustment body has a center point relative to the winding axis, wherein the center point is located at a distance from the center point of the winding relative to the winding axis. The winding axis can also be defined as the x-axis. Thus, the center point of the adjustment body is located at a distance from the center point of the winding in the x-direction.

[0022] For example, the center point refers to the geometric center point of the winding or adjustment body relative to the winding axis. The center point can also refer to the mass center or magnetic center of the winding or adjustment body.

[0023] For example, displacement of the adjustment body away from the center of the winding results in a decrease in inductance, while displacement toward the center results in an increase in inductance. An initial arrangement at a distance from the center (i.e., an eccentric arrangement) provides sufficient flexibility for adjusting the inductance. In particular, even after fine-tuning, an interval arrangement can be achieved.

[0024] The center point can be shifted by directly moving the adjustment body or the winding. The center point can also be shifted by changing the shape, material or number of the adjustment body.

[0025] In one embodiment, the inductance is adjusted via the position of the adjustment body relative to the winding axis. To perform the adjustment, the adjustment body can be moved in two directions relative to the winding, for example, until a target value is reached. Correspondingly, individual adjustment bodies of the adjustment assembly or the entire adjustment assembly can also be moved.

[0026] The inductive component may include a stop for limiting the displacement of the adjustment body along the winding axis. For example, the stop is formed by a part of the coil carrier or is attached to the coil carrier. Stops for limiting the displacement may also be provided on both sides.

[0027] For example, the adjustment body is positioned at a distance from the stop before and / or after displacement. This allows for flexibility in moving the adjustment body toward the stop, allowing for fine-tuning of the inductance. The adjustment body can also abut the stop before fine-tuning and move away from the stop during fine-tuning.

[0028] For example, before and / or after fine-tuning, the adjustment body is arranged such that displacement in one direction results in an increase in inductance, and displacement in the opposite direction results in a decrease in inductance. For example, the center point of the adjustment body is located at a distance from both the center point of the winding and the stop position. The stop position is the position of the center point of the adjustment body when the adjustment body abuts the stop.

[0029] For example, the distance between the center point of the adjusting body and the stop position is at least 20% of the distance between the stop position and the center point of the winding. Additionally or alternatively, for example, the distance between the center point of the adjusting body and the stop position is at least 20% of the distance between the stop position and the center point of the winding.

[0030] For example, the adjustment body or adjustment assembly is fixed relative to the winding. After adjusting the inductance, the adjustment body is particularly fixed to prevent displacement along the winding axis. To this end, for example, an adhesive is applied before or after adjustment. If the adhesive is applied before adjustment, a slow-curing adhesive can be used, allowing the adjustment body to be moved for adjustment before the adhesive cures.

[0031] The adhesive can be an adhesive. For example, the adhesive attaches the adjustment body to the winding or coil carrier. Therefore, after the adjustment body is fixed, adjustment is no longer possible. However, the components can be configured so that adjustment is possible by moving the adjustment body along the winding axis before applying the adhesive.

[0032] In one embodiment, the inductive component includes a housing for shielding. This may be a metal housing. The tuning body may be disposed between the housing and the windings. Additionally or alternatively, the tuning body may also serve as a shield.

[0033] According to another aspect of the present invention, a method for adjusting the inductance of an inductor component is provided. According to the method, an inductor component is provided that includes a winding and an adjustment body. The adjustment body comprises ferromagnetic material and surrounds at least some area of ​​the winding. In the method, the shape, position, and / or number of the adjustment bodies are varied to adjust the inductance.

[0034] For example, the above-mentioned inductive component is provided and adjusted during the method.Alternatively or additionally, the method can be used to obtain the above-mentioned inductive component.

[0035] For example, there may be multiple tuning bodies as described above. For example, the inductance can be adjusted by removing, adding, or replacing the tuning bodies. The tuning bodies may have different lengths, diameters, and / or materials.

[0036] For example, before adjusting an inductor, measure the inductance. If it deviates from the target value, use the adjustment tool to perform an adjustment. After the adjustment, perform another measurement (if necessary) and then perform another adjustment.

[0037] In one embodiment, the inductance is adjusted by shifting the position of the adjustment body along the winding axis. In particular, the relative position of the winding and the adjustment body is important here, so that the displacement comprises a direct displacement of the winding while the adjustment body remains in position.

[0038] For example, the adjustment body is arranged before adjustment so that the inductance can be increased by displacement in one direction and the inductance can be reduced by displacement in the opposite direction. In particular, the inductance value can be highest when the adjustment body is centered relative to the winding, and the inductance value can be lowest when the adjustment body is arranged most eccentrically.

[0039] For example, the adjustment body is initially positioned at the stop position and then moved toward the center point of the winding for adjustment. The adjustment body can also be moved beyond the center point. For example, after adjustment, the distance between the center point of the adjustment body and the stop position at the center point is at least 20% of the distance between the stop position and the center point of the winding.

[0040] Additionally or alternatively, for example, the distance between the center point of the adjustment body and the stop position is at least 20% of the distance between the stop position and the center point of the winding. These minimum distances may also exist before adjustment so that there is sufficient room for displacement in either direction, and therefore sufficient room to reduce or increase inductance.

[0041] After adjustment, the position of the adjustment body relative to the winding can be fixed. For example, a bonding agent (especially an adhesive) is used for this purpose.

[0042] This disclosure describes several aspects of the invention. All features disclosed with respect to a component or method are correspondingly disclosed with respect to another aspect, even if the corresponding features are not explicitly mentioned in the context of the other aspect.

[0043] The description of the subject matter provided herein is not limited to each specific embodiment. Rather, the features of the individual embodiments can be combined with one another where technically reasonable.

[0044] The objectives described in this article are explained in more detail below based on schematic design examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] These figures show:

[0046] Figure 1 is an embodiment of an inductive component in side view,

[0047] Figure 2 is another embodiment of the inductive component in side view,

[0048] Figure 3 is another embodiment of the inductive component in side view,

[0049] Figure 4 is another embodiment of the inductive component in side view,

[0050] Figures 5A to 5C It is a method used to adjust the inductance in the schematic.

[0051] In the following figures, the same reference numerals preferably refer to functionally or structurally equivalent parts of the various embodiments. DETAILED DESCRIPTION

[0052] Figure 1 An inductive component 1 is shown comprising a winding 2. The winding 2 is formed by a wire 3 which is wound helically.

[0053] For example (see Figure 4 ), the wire 3 is wound around the coil carrier 11. Component 1 can be configured as a so-called air-core coil, in which no magnetic core is present within the winding 2. Therefore, the coil carrier 11 is non-magnetic. For example, the coil carrier 11 includes or is made of plastic. Alternatively, the coil carrier 11 can be configured as a magnetic core, or a magnetic core can be inserted into the coil carrier 11.

[0054] The inductor component 1 includes a tuning assembly 40 formed from a plurality of tuning bodies 4_1, 4_2, and 4_n. After the winding 2 is completed, the inductance can be precisely adjusted using the tuning assembly 40. The tuning bodies 4_1, 4_2, and 4_n surround at least some areas of the winding 2. In particular, the tuning bodies 4_1, 4_2, and 4_n are at least partially disposed in an area further from the winding axis than the outside of the winding 2.

[0055] In particular, at least in some areas, the winding 2 is arranged between at least one of the adjustment bodies 4_1 , 4_2 , 4_n and the winding axis A. “Arranged between” is defined by a perpendicular line connecting a point of the adjustment body 4_1 , 4_2 , 4_n to the winding axis A hitting the winding 2 .

[0056] The respective adjustment bodies 4_1, 4_2, 4_n are formed by rings or sleeves made of ferromagnetic material, for example, ferrite.

[0057] In this case, the adjustment bodies 4_1, 4_2, and 4_n form a hollow cylinder, within which the winding 2 is disposed. A coil carrier may also be disposed within the hollow cylinder. Wire ends 6 and 7 protrude from the adjustment bodies 4_1, 4_2, and 4_n. For example, the wire ends 6 and 7 may extend further to connect the component 1 to a contact terminal (not shown) or to provide another contact connection (not shown).

[0058] After adjusting the inductance, the adjustment bodies 4_1, 4_2, 4_n can be fixed relative to the winding 2. For example, the adjustment bodies 4_1, 4_2, 4_n are attached to the winding 2 or the coil carrier using a bonding agent (e.g., adhesive). Depending on the adjustment procedure, this can be a fast-curing or slow-curing adhesive. For example, it can be a UV adhesive.

[0059] In addition to the adjustment bodies 4_1, 4_2, 4_n, the component 1 may use a housing (not shown here) that at least partially surrounds the adjustment bodies 4_1, 4_2, 4_n and the winding 2. The housing may increase the adjustment range.

[0060] For example, the housing can be a metal housing. This can be a separate component, for example, in the form of a metal cylinder. It can also be a wrapping of metal foil, particularly aluminum foil, wrapped around the adjustment bodies 4_1, 4_2, 4_n. Alternatively, it can be a coating on the adjustment bodies 4_1, 4_2, 4_n. The housing preferably extends over the entire winding 2, particularly when the adjustment assembly 40 does not extend over the entire winding 2.

[0061] In this case, the length of the adjustment component 40 is similar to the length of the winding 2 ; in particular, the adjustment component 40 is slightly longer than the winding 2 .

[0062] There may also be gaps 5 between the adjustment bodies 4_1, 4_2, 4_n. In particular, the gaps 5 may allow the positions of the adjustment bodies 4_1, 4_2, 4_n to be changed parallel to the winding axis in order to adjust the inductance.

[0063] To adjust the inductance, individual adjustment bodies 4_1, 4_2, 4_n (in this case, rings) can be selectively added or removed. For example, after winding 2 has been generated, adjustment bodies 4_1, 4_2, 4_n are placed around winding 2, and the inductance of component 1 is then measured. Depending on the deviation from the target value, one or more adjustment bodies 4_1, 4_2, 4_n are removed, or additional adjustment bodies 4_1, 4_2, 4_n are added. The inductance can then be measured again, and a check performed to determine whether the target value has been reached. If necessary, additional adjustment bodies 4_1, 4_2, 4_n are replaced.

[0064] The adjustment body 4 can have different lengths l_1, l_2, l_n. Depending on the size of the deviation between the target value and the measured value, a longer or shorter adjustment body l_1, l_2, l_n is removed or added.

[0065] For example, before tuning, inductive component 1 includes tuning bodies 4_1 to 4_n. To perform the tuning, tuning body 4_1 is removed, leaving inductive component 1 with only tuning bodies 4_2 to 4_n. The tuning assembly 40, including the remaining tuning bodies 4_2 to 4_n, is now shorter, resulting in a change in inductance, specifically a decrease in the inductance of component 1. In particular, the change at the edges of winding 2 results in a change in inductance.

[0066] The center of gravity of the adjustment assembly 40 is now also no longer centrally located relative to the winding 2 in the axial direction, but is offset to the right relative to the winding 2. This results in a change in the inductance, in particular a reduction in the inductance of the component 1.

[0067] Alternatively or in addition, the adjustment bodies 4_1, 4_2, 4_n may also have different outer shapes. For example, the adjustment bodies 4_1, 4_2, 4_n may have a rectangular outer shape or an elliptical outer shape. Tuning can then be performed by changing the adjustment body with an adjustment body of different size.

[0068] For example, the conductor 3 of the winding 2 is configured as a flat wire. It can be a copper wire.

[0069] For example, the inductance of component 1 is between 1 nH and 1000 nH. Depending on the design, the inductance can be adjusted by varying the adjustment element 40, for example, in steps of 0.01% of the total inductance, over a range of up to 10%. If the adjustment element 40 is very finely divided, the inductance value can be tuned even more precisely, down to values ​​well below 1 nH, in steps of 1 nH.

[0070] The inductance can be flexibly adjusted by combining and adjusting the different lengths, shapes, numbers, and material compositions of the bodies 4_1, 4_2, and 4_n. Due to the large number of possible combinations, the optimal configuration can be found with respect to AC loss, inductance, size, emission characteristics, radiation characteristics, shielding, thermal development, robustness, etc., in order to achieve optimal performance.

[0071] Figure 2 Another embodiment of the inductive component 1 is shown. Figure 1 In contrast, in addition to the adjustment bodies 4_1, 4_2, 4_n, this document also includes filling bodies 8_1, 8_2, 8_n. The filling bodies 8_1, 8_2, 8_n are non-magnetic. For example, the filling bodies 8_1, 8_2, 8_n include plastic material.

[0072] Filling bodies 8_1, 8_2, 8_n fill the spaces between adjustment bodies 4_1, 4_2, 4_n and serve to position adjustment bodies 4_1, 4_2, 4_n or fill empty spaces, for example, after an adjustment body has been removed to adjust inductance. Filling bodies 8_1, 8_2, 8_n can have the same length as adjustment bodies 4_1, 4_2, 4_n. Filling bodies 8_1, 8_2, 8_n can also have different lengths than adjustment bodies 4_1, 4_2, 4_n.

[0073] For example, to adjust the inductance, one of the adjustment bodies 4_1, 4_2, 4_n is replaced with a filling body 8_1, 8_2, 8_n, or the positions of the filling body 8_1, 8_2, 8_n and the adjustment body 4_1, 4_2, 4_n are changed.

[0074] Figure 3 Another embodiment of the inductive component 1 is shown. Figure 2 In contrast, the adjustment bodies 4_1 , 4_2 , 4_n have different diameters b1 , b2 , bn . For example, for adjustment purposes, one adjustment body is replaced by an adjustment body having a larger or smaller outer diameter.

[0075] Here, one or more filling bodies 8_1 may also be provided between the adjustment bodies 4_1, 4_2, and 4_n. In this case, only one filling body 8_1 is provided between two of the adjustment bodies 4_1 and 4_2, and no filling body exists between the other adjustment bodies 4_2 and 4_n. A filling body may also be provided between all or none of the adjustment bodies.

[0076] Also shown here is a housing 9 that houses the adjustment assembly 4 and the winding 2. The adjustment assembly 4 is disposed between the housing 9 and the winding 2. The adjustment assembly 4 may abut against a wall of the housing 9. Adjustment bodies 4_1, 4_2, 4_n may also be attached to the housing 9. The housing 9 may also be included in the other embodiments shown. Such a housing 9, particularly a metal housing, may improve shielding and increase the adjustment range.

[0077] Alternatively or in addition, the control bodies 4_1, 4_2, 4_n can also perform a shielding function, decoupling the inductor from the environment. Such shielding of electromagnetic waves / fields is particularly necessary in the high-frequency range. Decoupling can be further optimized using another metal housing.

[0078] In alternative embodiments of air core coils, the coil carrier can also be configured as a magnetic core (eg a ferrite core), or a magnetic core can be present in the coil carrier.

[0079] Figure 4 Another embodiment of an inductor component 1 is shown. Here, too, a tuning assembly 40 is disposed outside the winding 2. In this case, the winding comprises only a single tuning body 4. The tuning body 4 is configured as a sleeve. The winding 2 is disposed within the tuning body 4. In this case, the wire ends 6 and 7 protrude from the same end of the tuning body 4. The wire ends 6 and 7 may also protrude from different ends.

[0080] In this case, the adjustment body 4 is longer than the winding 2. For example, the adjustment body 4 is longer than the winding 2 by at most half the length of the winding 2.

[0081] Here, inductance is adjusted by moving the adjustment body 4 along the winding axis A. This changes the (longitudinal) position of the adjustment body 4 relative to the winding 2. Specifically, the distance d between the center point x_4 of the adjustment body 4 and the center x_2 of the winding 2 varies. For example, the center points x_2 and x_4 refer to the geometric center points of the winding 2 or the adjustment body 4 relative to the winding axis A, which can also be referred to as the x-axis. The center points x_2 and x_4 can also refer to the center of mass or magnetic center of the winding 2 or the adjustment body 4.

[0082] The inductor component 1 includes a stopper 10 that limits the displacement of the adjustment body 4 along the winding axis A. For example, the stopper 10 is an integral component of the coil carrier 11 around which the winding 2 is arranged. The stopper 10 limits the maximum displacement of the adjustment body 4 in one direction. When the adjustment body 4 abuts the stopper 10, the position of the center point of the adjustment body 4 is identified as x_10.

[0083] For example, in the initial position, the center point x_4 of the adjustment body 4 is positioned midway between the stopper position x_10 and the center point x_2 of the winding 2. In this case, there is ample room for fine-tuning in both longitudinal directions. For example, displacement away from the center point x_2 of the winding 2 results in a decrease in inductance, while displacement away from the stopper position x_10 toward the center point x_2 of the winding 2 results in an increase in inductance.

[0084] In particular, changing the position of the adjustment body 4 on the longitudinal edges of the winding 2 has a significant effect. Therefore, it is advantageous to move at least one longitudinal end of the adjustment body 4 in the region of the longitudinal ends of the winding 2. For example, before or after adjusting the inductance, the distance between the longitudinal ends of the winding 2 and the adjustment body 4 is only a few millimeters at most. In particular, the distances between the longitudinal ends of the adjustment body 4 and the respective nearest longitudinal ends of the winding 2 are different.

[0085] After adjusting the inductance, the adjustment body 4 is fixed relative to the winding 2, for example, on the coil carrier 11 or directly on the winding 2. In the end position, the adjustment body 4 is not centered, i.e., its center point x_4 is not located at the center point x_2 of the winding 2, nor at the stop position x_10, but rather is located between these two positions, or even outside the center point x_2 as viewed from the stop position x_10. For example, the longitudinal ends of the adjustment body 4 have different distances from the nearest edge turns of the winding 4.

[0086] The coil carrier 10 may further comprise one or more spacers 12 for positioning the adjustment body 4 , in particular, centering it at a fixed distance from the winding axis A. For example, the spacers 12 are configured as radial protrusions of the coil carrier 10 , against which the inner wall of the adjustment body 4 rests. Other elements may also be mounted on the coil carrier as spacers.

[0087] In this case, the coil carrier 10 has a cylindrical shape. The coil former can also have a different shape, such as a cube-like shape. The coil carrier 10 can also be part of a larger body, such as a ring-shaped body. The coil carrier 10 can be configured as a hollow body.

[0088] Figures 1 to 3 Implementation plan and Figure 4 Combinations of features of the embodiments are also possible. In particular, the coil carrier 11 may also be comprised in Figures 1 to 3 In the embodiment of , the wire ends 6, 7 protrude from the same end. Figures 1 to 3 In the embodiment, the center point of the adjustment component 40 on the winding axis A can also be used as a measure of the position of the adjustment component 40 relative to the winding 2, and additionally or alternatively, a displacement of the adjustment component 40 or the adjustment body 4_1, 4_2, 4_n relative to the winding 2 is possible.

[0089] Figures 5A to 5C The method steps for adjusting the inductance of the inductive component 1 are shown.

[0090] according to Figure 5A , an inductive component 1 is provided, for example according to Figure 4 For example, the adjustment body 4 is arranged so that its center point is located at a position x_4 that is intermediate between the stopper position x_10 and the position x_2 of the center point of the winding 2 .

[0091] For example, the initial position of adjustment body 4 may be stopper position x_10, and adjustment body 4 may be moved from stopper position x_10 toward center point x_2 of winding 2. If necessary, adjustment body 4 may be moved beyond center point x_2. This advantageously allows for easy adjustment of the initial position of adjustment body 4.

[0092] The inductance L of the component 1 is measured. The required displacement of the adjusting body 4 along the winding axis A (x-axis) is determined as a function of the target value of the inductance L of the component 1 .

[0093] according to Figure 5B , the adjustment body 4 then moves according to the deviation of the measured value from the target value.

[0094] For example, if the measured value is greater than the target value for inductance L, adjustment element 4 is moved away from the center point x_2 of winding 2 toward stop position x_10. If the measured value is less than the target value for inductance L, adjustment element 4 is moved toward the center point x_2 of winding 2. The displacement can be performed with a defined step size (e.g., in the µm range). For example, the maximum displacement is in the millimeter range. For example, the displacement is performed with the assistance of a stepper motor. The length of the displacement can also be set as a function of the deviation from the target value.

[0095] For example, by moving the adjustment body 4 from the position of the center point x_2 to the stop position x_10, the inductance can be reduced by up to 5%, depending on the geometry of the component 1. The maximum inductance value is achieved if the adjustment body 4 is in the center position relative to the winding 2; the minimum inductance value is achieved if there is a maximum displacement to the position x_10.

[0096] The inductance value can then be measured again. If the inductance is close enough to the target value, the position x_4 of the adjustment body 4 is fixed.

[0097] according to Figure 5C , the adjustment body 4 is fixed in its x position. For example, the adjustment body 4 is attached to the winding 2 or the coil carrier 11 by means of an adhesive 13. For example, the adhesive 13 can be an adhesive, in particular a UV adhesive. The adhesive 13 is applied and cured.

[0098] The end position x_4 is now available for a group of components 1. Alternatively, it can also be adjusted again for each individual component 1. This method is suitable for adjustment in fully automated production.

[0099] for Figures 1 to 3 In these embodiments, the method can be adjusted accordingly. Figure 5A After the inductor L in the circuit is adjusted, for example, one of the adjustment bodies 4_1, 4_2, 4_n can be removed or added for adjustment.

[0100] List of Figure Numbers

[0101] 1Inductor components

[0102] 2 windings

[0103] 3-wire

[0104] 40 adjustment components

[0105] 4.4_1, 4_2, 4_n adjust the main body

[0106] 5 gaps

[0107] 6 Wire ends

[0108] 7 Wire end

[0109] 8_1, 8_2, 8_n fill the main body

[0110] 9 shell

[0111] 10 stopper

[0112] 11 coil carrier

[0113] 12 spacers

[0114] 13. Binder

[0115] A Winding axis

[0116] x_2 winding center

[0117] x_4 Adjust the center of the body / adjust the component

[0118] x_10 Stopper position

[0119] d Winding distance center – adjust the body center

[0120] L inductor

[0121] b1, b2, b n diameter

[0122] l1, l2, l n length

Claims

1. An inductive component, The inductance component comprises a winding (2) and a plurality of adjustment bodies (4, 4_1, 4_2, 4_n) for adjusting the inductance (L) of the inductance component (1), wherein the adjustment bodies (4, 4_1, 4_2, 4_n) comprise ferromagnetic material and surround at least some areas of the winding (2), wherein the inductance (L) is adjusted via the shape and / or position and / or number of the adjustment bodies (4, 4_1, 4_2, 4_n), and a filling body (8_1, 8_2, 8_n) comprising non-magnetic material is arranged between at least two of the adjustment bodies (4_1, 4_2, 4_n).

2. The inductor component according to claim 1, The winding (2) is at least partially arranged in the adjustment body (4, 4_1, 4_2, 4_n).

3. The inductive component according to claim 1, wherein the tuning body (4, 4_1, 4_2, 4_n) is configured as a ring or a sleeve. 4 . The inductive component according to claim 1 , wherein the tuning bodies have different lengths ( l1 , l2 , l3 ) and / or different diameters ( b1 , b2 , b3 ).

5. The inductive component according to claim 1 , wherein the adjustment body ( 4 , 4_1 , 4_2 , 4_n) has a center point ( x_4 ) relative to a winding axis (A), and the winding ( 2 ) has a center point ( x_2 ) relative to the winding axis (A), wherein the center point ( x_4 ) of the adjustment body ( 4 ) is located at a distance ( d ) from the center point ( x_2 ) of the winding ( 2 ).

6. The inductive component according to any one of claims 1 to 3, comprising a stopper (10) for limiting the displacement of the adjustment body along the winding axis (A), wherein the adjustment body (4, 4_1, 4_2, 4_n) is arranged at a distance from the stopper (10).

7. The inductive component according to any one of claims 1 to 3, wherein the inductance (L) is adjusted via the position of the adjustment body (4, 4_1, 4_2, 4_n) relative to the winding axis (A).

8. The inductive component according to any one of claims 1 to 3, wherein the adjustment body (4, 4_1, 4_2, 4_n) is fixed relative to the winding (2) by means of an applied adhesive (13), wherein the adjustment body (4, 4_1, 4_2, 4_n) is configured to be displaceable in the direction of the winding axis (A) in the absence of the adhesive (13).

9. The inductive component according to any one of claims 1 to 3, comprising a housing (9) for shielding, wherein the adjustment body (4, 4_1, 4_2, 4_n) is arranged between the housing (9) and the winding (2). 10 . The inductive component according to claim 1 , which is designed as an air core coil.

Images