EP3977493B1 - Induktives bauelement und verfahren zur einstellung einer induktivität - Google Patents

Induktives bauelement und verfahren zur einstellung einer induktivität Download PDF

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Publication number
EP3977493B1
EP3977493B1 EP20729682.3A EP20729682A EP3977493B1 EP 3977493 B1 EP3977493 B1 EP 3977493B1 EP 20729682 A EP20729682 A EP 20729682A EP 3977493 B1 EP3977493 B1 EP 3977493B1
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EP
European Patent Office
Prior art keywords
adjustment
winding
bodies
inductance
inductive component
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Application number
EP20729682.3A
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German (de)
English (en)
French (fr)
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EP3977493A1 (de
Inventor
Oleg FURSA
Jürgen Frey
Stefan Weber
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Philip Morris Products SA
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Philip Morris Products SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
    • H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F21/00—Variable inductances or transformers of the signal type
    • H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
    • H01F21/10—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by means of a movable shield
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties

Definitions

  • the present invention relates to an inductive component and a method for adjusting an inductance of an inductive component.
  • This can 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 in a stereo system.
  • the pamphlets DE 36 18 122 A1 , DE 39 26 231 A1 , DE 199 52 192 A1 and DE 10 2008 063 312 A1 describe matchable inductive components.
  • An adjustment is usually accomplished by pushing a core made of soft magnetic material into or out of the interior of the winding or by pulling the winding apart or compressing it.
  • EP 0 201 846 A1 discloses a magnetic choke having a cylindrical coil and an iron shell at least partially surrounding the choke coil.
  • the iron shell is slidably mounted on the choke coil to change its position along the coil axis and thus tune the inductance of the coil.
  • U.S. 2,555,511 A discloses a method of reducing or increasing the inductance of a coil by placing a metallic shield around the coil.
  • the shield can have a plurality of metal rings of different widths arranged coaxially around the coil, which are slidably mounted on an insulating molded part/insulating support sleeve.
  • JP 2011 109553 A discloses a transmitting antenna having a cylindrical coil surrounding a magnetic core.
  • the inductance of the coil can be adjusted by suitably selecting the number, the axial length and the position of ring-shaped elements which consist of a magnetic material and are arranged to be displaceable along the longitudinal axis of the coil.
  • EP 1 808 871 A1 describes a coil assembly having a coil wound around a drum core.
  • the drum core and the coil are surrounded by a cup-shaped ferrite pot core, which can be moved by means of a threaded bushing relative to the drum core along its longitudinal axis magnetic flux through the pot core and thus the inductance of the coil.
  • an inductive component has a winding and a number of adjustment bodies for adjusting the inductance of the inductive component.
  • the calibration bodies have a ferromagnetic material and at least partially surround the winding.
  • the adjustment bodies are arranged at least in some areas in an area that is further away from a winding axis of the winding than the outside of the winding.
  • the winding is at least partially arranged within the balancing body.
  • the adjustment bodies are thus arranged at least in regions in an outer space of the winding.
  • the calibration bodies do not extend into the interior of the winding and are therefore not designed as a magnetic core or as part of a magnetic core.
  • the winding can also be arranged completely within the adjustment bodies or only an edge region of the winding can protrude from the adjustment bodies.
  • the adjustment body has a similar length to the winding.
  • the adjustment body is, for example, shorter or longer than the winding by a maximum of half the length of the winding. In this way, when the adjustment body is displaced from a central position, a particularly good inductance setting can be achieved by the longitudinal ends of the adjustment body having a major influence on the ends of the winding.
  • the magnetic field of the winding is guided through the ferromagnetic material of the adjustment body, thereby adjusting the inductance of the component.
  • the material of the calibration body is preferably not or only slightly electrically conductive. This means that no current flow is induced in the balancing bodies that counteracts the field generated by the winding. For example, the inductance can be maximized by centering the alignment body to the coil and reduced by shifting it.
  • the adjustment bodies have a ferrite or an iron alloy.
  • the material of the calibration body can be selected in such a way that it is largely independent of temperature. Thus, an adjustment is possible independent of the temperature.
  • calibration body There can either be only one calibration body (not claimed here) or—as claimed here—several such calibration bodies can be present. If there are several calibration bodies, the term calibration arrangement is also used below. The properties described for a calibration body can also be used analogously for the Alignment array apply or for individual alignment bodies of an alignment array.
  • the winding is at least partially arranged within the balancing body.
  • the adjustment bodies are designed as hollow bodies.
  • the adjustment body can be designed as a ring or sleeve.
  • the inductance of the component is set by the shape and/or position of the adjustment bodies and/or the number of adjustment bodies.
  • the inductance can be finely adjusted by changing the shape, position and/or number of the adjustment bodies of the component.
  • the inductive component can have what is known as an air 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 by external adjustment bodies. In an alternative embodiment, the inductive component can have a magnetic core, for example a ferrite core. In this case, the adjustment bodies are preferably formed separately from the ferrite core.
  • the winding wire is designed as a flat wire, for example. It can be a copper wire.
  • the inductance of the component is between 1 and 1000 nH, for example. Depending on the design, the inductance can be adjusted in a range of up to 10% by varying the adjustment bodies.
  • the component has a plurality of such adjustment bodies.
  • the adjustment bodies form, for example, a sleeve-shaped adjustment arrangement in which the winding is arranged.
  • the inductance can be set flexibly by combining adjustment bodies with different lengths, shapes and material compositions and by varying the number of adjustment bodies.
  • the adjustment bodies have different lengths.
  • An extension along the winding axis of the winding is referred to as length.
  • Alignment bodies can be added or removed to adjust the inductance. If the inductance value of the component corresponds to a target value, the alignment bodies can be fixed in their position.
  • the adjustment bodies can have different diameters.
  • the extent of the adjustment body perpendicular to the winding axis is referred to as the diameter.
  • an adjustment body can be replaced by an adjustment body with a different diameter.
  • Calibration bodies of different geometric shapes can also be combined. For example, reference bodies with circular, elliptical and rectangular outer contours can be combined.
  • the calibration bodies can have different ferromagnetic materials.
  • an adjustment body can be replaced by an adjustment body comprising a different material.
  • the number of adjustment bodies can also be varied to adjust the inductance.
  • a filling body comprising a non-magnetic material can also be replaced by a calibration body, or vice versa.
  • a filling body comprising a non-magnetic material is arranged between at least two of the calibration bodies.
  • the filling body has a plastic material.
  • the adjustment bodies have a center point with respect to the winding axis, the center point being at a distance from a center point of the winding with respect to the winding axis.
  • the winding axis can also be defined as the x-axis.
  • the center point of the adjustment bodies in the x-direction is at a distance from the center point of the winding.
  • the midpoints designate, for example, the geometric midpoints of the winding or the adjustment body with respect to the winding axis.
  • the centers can also denote the centers of mass or the magnetic centers of gravity of the winding or the calibration body.
  • a displacement of the calibration bodies away from the center point of the winding leads to a reduction in inductance, and a displacement toward the center point leads to an increase in inductance.
  • an initial spaced-apart arrangement ie, an off-center arrangement
  • there is sufficient latitude for adjusting the inductance there is sufficient latitude for adjusting the inductance.
  • the spaced arrangement can in particular also be present after the fine adjustment.
  • the adjustment bodies or the winding can be shifted directly.
  • a variation in the shape, the material or the number of adjustment bodies can also lead to a shift in the center point.
  • the inductance is set by the position of the adjustment body with respect to the winding axis.
  • the adjustment bodies can be displaced in both directions relative to the winding, for example, until a desired value is reached.
  • individual adjustment bodies of an adjustment arrangement or the entire adjustment arrangement can also be moved.
  • the inductive component can have a stop for limiting the displacement of the adjustment bodies along a winding axis.
  • the stop is formed by part of a coil carrier or is attached to the coil carrier. Stops can also be provided on both sides to limit the displacement.
  • the adjustment bodies are arranged at a distance from the stop, for example, before and/or after the displacement. Thus, there is leeway for shifting the adjustment body towards the stop, so that there is leeway for fine adjustment of the inductance.
  • a calibration body can also hit the stop before the fine adjustment and be moved away from the stop during the fine adjustment.
  • adjustment bodies are arranged before and/or after the fine adjustment in such a way that a shift in one direction to increase the inductance and one Shifting in the opposite direction would lead to a reduction in inductance.
  • the center point of the adjustment body is removed both from the center point of the winding and from a stop position.
  • the stop position is the position of the center point of the corresponding adjustment body when the adjustment body hits a stop.
  • the distance between the center point of one of the adjustment bodies and the stop position is at least 20% of the distance between the stop position and the center point of the winding.
  • the distance between the center point of one of the adjustment bodies and the center point of the winding is at least 20% of the distance between the stop position and the center point of the winding.
  • the adjustment bodies or the adjustment arrangement are, for example, fixed relative to the winding. In particular, after the inductance has been set, the adjustment bodies are secured against displacement along the winding axis.
  • an adhesive is applied, for example, before or after the adjustment. If the adhesive is applied before the calibration, a slow-curing adhesive can be used so that the calibration bodies can be moved for the calibration and the adhesive can then be cured.
  • the adhesive can be an adhesive.
  • the adhesive fastens the alignment bodies, for example, to the winding or a bobbin. This means that once the adjustment body has been fixed, adjustment is no longer possible.
  • the component can be designed in such a way that before application of the adhesive, an adjustment is possible by moving the adjustment body along the winding axis.
  • the inductive component has a housing for shielding. It can be a metal case.
  • the matching bodies can be arranged between the housing and the winding.
  • the adjustment bodies can also be used for shielding.
  • a method for setting an inductance value of an inductive component is specified.
  • an inductive component having a winding and a calibration body is provided.
  • the adjustment body has a ferromagnetic material and surrounds the winding at least in certain areas.
  • the shape and/or position and/or number of calibration bodies is changed in order to adjust the inductance.
  • the inductive component described above is provided and adjusted in the method.
  • the inductive component described above can be obtained by the method.
  • the inductance can be adjusted, for example, by removing, adding or replacing a trimming body.
  • the calibration bodies can have different lengths, diameters and/or materials.
  • the inductance Before setting the inductance, for example, the inductance is measured. If there is a deviation from a target value, an adjustment is made using the adjustment body. After adjustment, a measurement and, if necessary, a further adjustment can take place.
  • the position of the adjustment body is shifted along the winding axis to adjust the inductance.
  • the relative position of the winding and the adjustment body is particularly important here, so that a displacement includes a direct displacement of the winding while holding the adjustment body.
  • the adjustment body is arranged in such a way that the inductance can be increased by displacement in one direction and the inductance can be reduced by displacement in the opposite direction.
  • the inductance value can be highest when the adjustment body is arranged centered relative to the winding, and the inductance value can be lowest when the arrangement is maximally off-center.
  • the adjustment body is initially positioned at the stop position and then shifted towards the center of the winding for adjustment.
  • the adjustment body can also be moved beyond the center point. After the adjustment, for example, the distance between the center point of the adjustment body and the stop position of the center is at least 20% of the distance between the stop position and the center point of the winding.
  • the distance between the center point of the adjustment body and the center point of the winding is at least 20% of the distance between the stop position and the center point of the winding. These minimum distances can also be present before the adjustment, so that there is sufficient leeway for a shift in both directions and thus for a reduction or increase in the inductance.
  • the position of the adjustment body to the winding can be fixed.
  • an adhesive in particular an adhesive, is applied for this purpose.
  • figure 1 shows an inductive component 1 which has a winding 2 .
  • the winding 2 is formed from a helically wound wire 3 .
  • the wire 3 is wrapped around a bobbin 11 (see figure 4 ) wrapped.
  • the component 1 can be designed as a so-called air-core coil, in which no magnetic core is arranged inside the winding 2 .
  • the coil carrier 11 is thus non-magnetic.
  • the coil support 11 has plastic or is made of plastic.
  • the coil carrier 11 is designed as a magnetic core or a magnetic core is inserted into the coil carrier 11 .
  • the inductive component 1 has a balancing arrangement 40 which is formed by a plurality of balancing bodies 4_1, 4_2, 4_n. Through the balancing arrangement 40, the inductance can be precisely adjusted after completion of the winding 2.
  • the adjustment bodies 4_1, 4_2, 4_n surround the winding 2 at least in certain areas. In particular, the adjustment bodies 4_1, 4_2, 4_n are at least partially arranged in an area that is further away from the winding axis than the outside of the winding 2.
  • the winding 2 is arranged at least in regions between one of the adjustment bodies 4_1, 4_2, 4_n and the winding axis A.
  • “arranged between” is defined in that, when there is a vertical connecting line between a point of the adjustment body 4_1, 4_2, 4_n and the winding axis A, the winding 2 is struck by the connecting line.
  • the calibration bodies 4_1, 4_2, 4_n are each formed from rings or sleeves made from ferromagnetic material.
  • the material is ferrite.
  • the adjustment bodies 4_1, 4_2, 4_n form a hollow cylinder in which the winding 2 is arranged.
  • the coil carrier can also be arranged in the hollow cylinder.
  • the wire ends 6, 7 protrude from the adjustment bodies 4_1, 4_2, 4_n.
  • the wire ends 6, 7 are, for example, continued to contact the component 1 to a contact terminal (not shown) or provided with a further contact (not shown).
  • the adjustment bodies 4_1, 4_2, 4_n can be fixed relative to the winding 2 after the inductance has been adjusted.
  • the adjustment bodies 4_1, 4_2, 4_n are attached to the winding 2 or a coil carrier with an adhesive, for example an adhesive. It can change be a fast or slow-curing adhesive after the adjustment process. For example, it is a UV adhesive.
  • the component 1 can have a housing (not shown here), which at least partially surrounds the adjustment bodies 4_1, 4_2, 4_n and the winding 2.
  • the housing can increase the adjustment range.
  • the housing can be a metal housing, for example. This can be a separate component, for example in the form of a metal cylinder. It can also be a coil made of a metal foil, in particular an aluminum foil, which is wound around the adjustment bodies 4_1, 4_2, 4_n. Alternatively, it can also be a coating on the calibration bodies 4_1, 4_2, 4_n.
  • the housing preferably extends over the entire winding 2, in particular in the event that the adjustment arrangement 40 does not extend over the entire winding 2.
  • the adjustment arrangement 40 has a similar length to the winding 2, in particular the adjustment arrangement 40 is slightly longer than the winding 2.
  • Columns 5 can also be present between the adjustment bodies 4_1, 4_2, 4_n.
  • the gaps 5 can be such that the position of the adjustment bodies 4_1, 4_2, 4_n can be changed parallel to the winding axis to adjust the inductance.
  • individual adjustment bodies 4_1, 4_2, 4_n in this case rings, can be selectively added or removed.
  • the adjustment bodies 4_1, 4_2, 4_n are arranged around the winding 2 and the inductance of the component 1 is then measured.
  • one or more of the calibration bodies 4_1, 4_2, 4_n are removed or more calibration bodies 4_1, 4_2, 4_n are added.
  • the inductance can then be measured again and a check made as to whether a target value has been reached. If necessary, further adjustment bodies 4_1, 4_2, 4_n are exchanged.
  • the adjustment bodies 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 calibration body l_1, l_2, l_n is removed or added.
  • the inductive component 1 has the adjustment bodies 4_1 to 4_n.
  • the adjustment body 4_1 is removed for the adjustment, so that the inductive component 1 only has the adjustment bodies 4_2 to 4_n.
  • the adjustment arrangement 40 formed from the remaining adjustment bodies 4_2 to 4_n, is now shortened and leads to a change in the inductance, in particular a reduction in the inductance of the component 1.
  • a change at the edge of the winding 2 in particular leads to a change in the inductance.
  • the adjustment arrangement 40 is now no longer arranged in the axial direction in its center of gravity relative to the winding 2 , but rather is shifted to the right relative to the winding 2 . This causes a change in inductance, in particular a reduction in the inductance of component 1.
  • the adjustment bodies 4_1, 4_2, 4_n can also have different peripheral shapes.
  • the calibration bodies 4_1, 4_2, 4_n can have rectangular or elliptical peripheral shapes. An adjustment can then be made, for example, by changing the replacement of an adjustment body with an adjustment body with a different circumference.
  • the wire 3 of the winding 2 is designed as a flat wire, for example. It can be a copper wire.
  • the inductance of the component 1 is between 1 and 1000 nH, for example.
  • the inductance can be adjusted in a range of up to 10% in steps of 0.01% of the total inductance. If the adjustment arrangement 40 is subdivided very finely, finer adjustment of the inductance value can result in steps of 1 nH to well below 1 nH.
  • the inductance can be set flexibly by combining different lengths, shapes, number and material compositions of the adjustment bodies 4_1, 4_2, 4_n. Due to the large number of possible combinations, an optimal configuration can be found in terms of AC losses, inductance, size, radiation characteristics, radiation characteristics, shielding, heat development, robustness, etc., so that the best possible performance can be achieved.
  • FIG 1 shows an embodiment of an inductive component 1 according to the presently claimed invention.
  • filling bodies 8_1, 8_2, 8_n are also present here in addition to the adjustment bodies 4_1, 4_2, 4_n.
  • the filling bodies 8_1, 8_2, 8_n are non-magnetic.
  • the filling bodies 8_1, 8_2, 8_n have a plastic material.
  • the filling bodies 8_1, 8_2, 8_n fill the space between the calibration bodies 4_1, 4_2, 4_n and are used to determine the positions of the calibration bodies 4_1, 4_2, 4_n or to fill empty spaces, for example after removing a calibration body to adjust the inductance.
  • the filling bodies 8_1, 8_2, 8_n can each have the same length as the adjustment bodies 4_1, 4_2, 4_n.
  • the filling bodies 8_1, 8_2, 8_n can also have a different length than the adjustment bodies 4_1, 4_2, 4_n.
  • one of the adjustment bodies 4_1, 4_2, 4_n is replaced by a filling body 8_1, 8_2, 8_n, or the position of the filling bodies 8_1, 8_2, 8_n and adjustment bodies 4_1, 4_2, 4_n is changed.
  • figure 3 shows a further embodiment of an inductive component 1.
  • the calibration bodies 4_1, 4_2, 4_n have different diameters b 1 , b 2 , b n .
  • an adjustment body is replaced by an adjustment body with a larger or smaller outside diameter.
  • one or more filling bodies 8_1 can be arranged between the balancing bodies 4_1, 4_2, 4_n. In the present case there is only one filling body 8_1 between two of the adjustment bodies 4_1, 4_2 and there is no filling body between the other adjustment bodies 4_2, 4_n. Filling bodies can also be present between all or none of the calibration bodies.
  • a housing 9 is indicated here, in which the adjustment arrangement 4 and the winding 2 are accommodated.
  • the balancing arrangement 4 is arranged between the housing 9 and the winding 2 .
  • the adjustment arrangement 4 can rest against a wall of the housing 9 .
  • the calibration bodies 4_1, 4_2, 4_n can also be attached to the housing 9.
  • the housing 9 can also be present in the other embodiments shown. Such a housing 9, in particular a metal housing, can improve the shielding and increase the adjustment range.
  • the adjustment bodies 4_1, 4_2, 4_n can also assume a shielding function, so that the inductances are decoupled from the environment. Such shielding from electromagnetic waves/fields is particularly necessary in the high-frequency range. With an additional metal housing, the decoupling can be further optimized.
  • the coil carrier can also be in the form of a magnetic core, for example a ferrite core, or a magnetic core can be present in the coil carrier.
  • FIG 4 shows another embodiment of an inductive component 1, which does not fall under the presently claimed invention, but serves for a better understanding of the invention.
  • a balancing arrangement 40 is arranged in the exterior of the winding 2, which has only a single balancing body 4 here.
  • the adjustment body 4 is designed as a sleeve.
  • the winding 2 is arranged within the balancing body 4 .
  • the wire ends 6 , 7 protrude from the same end of the adjustment body 4 .
  • the wire ends 6, 7 can also protrude from different ends.
  • the adjustment body 4 has a greater length than the winding 2.
  • the adjustment body 4 is longer than the winding 2 by a maximum of half the length of the winding 2.
  • the inductance is adjusted here by moving the adjustment body 4 along the winding axis A.
  • the (longitudinal) position of the adjustment body 4 relative to the winding 2 is thus changed.
  • the distance d from the center point x_4 of the adjustment body 4 to the center point x_2 of the winding 2 is varied.
  • the midpoints x_2, x_4 denote, for example, the geometric midpoints of the winding 2 or the adjustment body 4 with respect to the winding axis A, which can also be referred to as the x-axis.
  • the centers x_2, x_4 can also denote the centers of mass or the magnetic centers of gravity of the winding 2 or of the adjustment body 4.
  • the inductive component 1 has a stop 10, the displacement of the calibration body 4 along the Winding axis A limited.
  • the stop 10 is, for example, an integral part of a coil carrier 11 around which the winding 2 is arranged.
  • the stop 10 limits the maximum displacement of the calibration body 4 in one direction.
  • the position of the center point of the adjustment body 4 when the adjustment body 4 hits the stop 10 is denoted by x_10.
  • the center point x_4 of the adjustment body 4 is arranged halfway between the stop position x_10 and the center point x_2 of the winding 2 .
  • a major effect is created by changing the position of the adjustment body 4 on the longitudinal edges of the winding 2. It is therefore advantageous if at least one longitudinal end of the adjustment body 4 is displaced in the area of a longitudinal end of the winding 2.
  • the distance between a longitudinal end of the winding 2 and the adjustment body 4 before or after the inductance is set is only a few mm at most.
  • the distances between the longitudinal ends of the adjustment body 4 and the nearest longitudinal end of the winding 2 are different.
  • the adjustment body 4 After setting the inductance, the adjustment body 4 is fixed in a position 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 positioned neither in the middle, ie not with its center x_4 at the position of the center x_2 of the winding 2, nor at the stop position x_10, but between these two positions or even positioned beyond the center point x_2 seen from the stop position x_10. For example, the lengthwise ends of the adjustment body 4 are then at different distances from the closest turn of the winding 4 at the edge.
  • the coil carrier 10 can also have one or more spacers 12 for positioning, in particular centering, the adjustment body 4 at a specified distance from the winding axis A.
  • the spacers 12 are designed, for example, as radial projections of the coil carrier 10, against which an inner wall of the adjustment body 4 rests. Additional elements can also be applied as spacers on the coil carrier.
  • the coil carrier 10 has a cylindrical shape.
  • the coil former can also have a different shape, for example a cuboid shape.
  • the coil support 10 can also be part of a larger body, for example an annular body.
  • the coil carrier 10 can be designed as a hollow body.
  • the coil support 11 may also be present and the wire ends 6, 7 protrude from the same end.
  • the center of the adjustment arrangement 40 on the winding axis A can be used as a measure for the position of the adjustment arrangement 40 relative to the winding 2 and it is additionally or alternatively possible to shift the adjustment arrangement 40 or the adjustment bodies 4_1, 4_2, 4_n to the winding 2.
  • FIGS. 5A to 5C 12 show method steps when setting an inductance of an inductive component 1.
  • the method shown as an example does not fall under the presently claimed invention, but also serves to improve understanding of the invention.
  • an inductive component 1 is provided, for example a component according to FIG figure 4 .
  • a balancing body 4 is arranged, for example, with its center point at position x_4 halfway between a stop position x_10 and position x_2 of the center point of winding 2 .
  • the starting position of the adjustment body 4 can also be the stop position x_10, for example, and the adjustment body 4 is displaced from the stop position x_10 in the direction of the center point x_2 of the winding 2. If necessary, the adjustment body 4 can also be moved beyond the center point x_2. This has the advantage that the starting position of the adjustment body 4 can be adjusted in a simple manner.
  • the inductance L of the component 1 is measured.
  • the required displacement of the adjustment body 4 along the winding axis A (x-axis) is determined as a function of a setpoint value for the inductance L of the component 1 .
  • the adjustment body 4 is displaced away from the center point x_2 of the winding 2 in the direction of the stop position x_10. If the measured value is less than the target value of the inductance L, the adjustment body 4 is shifted toward the center point x_2 of the winding 2 .
  • the shift can take place in defined steps, for example in the pm range.
  • the maximum displacement is, for example, in the mm range.
  • the displacement takes place with the help of a stepping motor.
  • the length of the shift can also be defined depending on the deviation from the setpoint.
  • a reduction in the inductance of up to 5% can be achieved by moving the adjustment body 4 from the position of the center point x_2 to the stop position x_10.
  • a maximum inductance value can be achieved when the adjustment body 4 is in a central position relative to the winding 2, and a minimum inductance value can be achieved when there is a maximum shift to the position x_10.
  • the inductance value can then be measured again. If the inductance is sufficiently close to the target value, the position x_4 of the adjustment body 4 is fixed.
  • the adjustment body 4 is fixed in its x-position.
  • the adjustment body 4 is attached to the winding 2 or to the coil carrier 11 by means of an adhesive 13 .
  • the adhesive 13 can be, for example, an adhesive, in particular a UV adhesive.
  • the adhesive 13 is applied and cured.
  • the end position x_4 can now be used for a group of components 1. As an alternative to this, the adjustment can also be carried out again for each individual component 1 .
  • the method is suitable for adjustment in a fully automated production.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
EP20729682.3A 2019-05-29 2020-05-27 Induktives bauelement und verfahren zur einstellung einer induktivität Active EP3977493B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019114508 2019-05-29
PCT/EP2020/064726 WO2020239849A1 (de) 2019-05-29 2020-05-27 Induktives bauelement und verfahren zur einstellung einer induktivität

Publications (2)

Publication Number Publication Date
EP3977493A1 EP3977493A1 (de) 2022-04-06
EP3977493B1 true EP3977493B1 (de) 2023-07-05

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US (1) US20220223339A1 (pt)
EP (1) EP3977493B1 (pt)
JP (1) JP2022534579A (pt)
KR (1) KR20220015431A (pt)
CN (1) CN113874968A (pt)
BR (1) BR112021021684A2 (pt)
IL (1) IL288325B1 (pt)
PL (1) PL3977493T3 (pt)
WO (1) WO2020239849A1 (pt)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE472540A (pt) * 1945-06-18
US2555511A (en) * 1946-04-09 1951-06-05 Rca Corp Variable permeability tuning system
US3173080A (en) * 1959-05-25 1965-03-09 Maeda Hisao Electric circuit having distributed constants
US3202906A (en) * 1959-05-25 1965-08-24 Maeda Hisao Electric circuit having distributed constants
CH668662A5 (de) * 1985-05-09 1989-01-13 Max Breitmeier Elektromagnetische drossel.
DE3618122A1 (de) 1986-05-30 1987-12-03 Johann Leonhard Huettlinger Abgleichbare filterspule
DE3926231A1 (de) 1989-08-09 1991-02-14 Kolbe & Co Hans Kleine abgleichbare induktivitaet
DE19952192A1 (de) 1999-10-29 2001-04-12 Siemens Ag Verfahren zum Abgleichen einer elektronischen Schaltung, insbesondere einer Oszillatorschaltung
JP2007194282A (ja) * 2006-01-17 2007-08-02 Sumida Corporation コイル部品
DE102008063312B4 (de) * 2008-12-30 2015-05-21 Siemens Aktiengesellschaft Vorabgleichbare SMD-Spulen für hohe Ströme
JP5350192B2 (ja) * 2009-11-20 2013-11-27 オムロンオートモーティブエレクトロニクス株式会社 送信用アンテナ

Also Published As

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BR112021021684A2 (pt) 2022-03-15
IL288325A (en) 2022-01-01
IL288325B1 (en) 2024-08-01
EP3977493A1 (de) 2022-04-06
KR20220015431A (ko) 2022-02-08
WO2020239849A1 (de) 2020-12-03
JP2022534579A (ja) 2022-08-02
PL3977493T3 (pl) 2023-11-13
US20220223339A1 (en) 2022-07-14
CN113874968A (zh) 2021-12-31

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