EP3803923B1 - Inductive component and method of manufacturing the same - Google Patents
Inductive component and method of manufacturing the same Download PDFInfo
- Publication number
- EP3803923B1 EP3803923B1 EP19727378.2A EP19727378A EP3803923B1 EP 3803923 B1 EP3803923 B1 EP 3803923B1 EP 19727378 A EP19727378 A EP 19727378A EP 3803923 B1 EP3803923 B1 EP 3803923B1
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- 230000001939 inductive effect Effects 0.000 title claims description 28
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000004804 winding Methods 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 16
- 238000005476 soldering Methods 0.000 claims description 12
- 230000000295 complement effect Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 2
- 239000011162 core material Substances 0.000 description 63
- 238000005516 engineering process Methods 0.000 description 14
- 238000003825 pressing Methods 0.000 description 7
- 239000004020 conductor Substances 0.000 description 6
- 230000001629 suppression Effects 0.000 description 6
- 238000005304 joining Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000002707 nanocrystalline material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
- H01F17/062—Toroidal core with turns of coil around it
-
- 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
- H01F27/2895—Windings disposed upon ring cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15333—Amorphous metallic alloys, e.g. glassy metals containing nanocrystallites, e.g. obtained by annealing
-
- 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
- H01F27/24—Magnetic cores
- H01F27/25—Magnetic cores made from strips or ribbons
-
- 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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/303—Clamping coils, windings or parts thereof together
-
- 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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- 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
- H01F41/02—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 for manufacturing cores, coils, or magnets
- H01F41/04—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 for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/08—Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal cores
Definitions
- the invention relates to an inductive component and a method for its production.
- toroidal cores and inductive components having thick wire windings the mechanical stress on the toroidal cores is high due to the winding tension that occurs during winding.
- the wire In order to ensure that the wires fit snugly, the wire must be pulled taut as it is pulled through the toroidal core. The forces that occur are essentially absorbed by the edges of the toroidal core.
- the toroidal core itself or a housing encasing it must therefore have an appropriate strength in order to avoid damage to the toroidal core or other impairments. Since toroidal cores have to have a small volume and be highly permeable in numerous areas of application, the core material must be protected from the forces acting on it with regard to magnetostriction.
- the housing or other casing should be self-supporting and absorb the forces occurring during winding without deforming and without passing the forces on to the toroidal core.
- inductive components which have a core and a winding made up of a large number of sections connected to one another are given in the publications DE 38 32 659 A1 , DE 10 2016 210746 A1 , U.S. 2010/253459 A1 , WO 2017/141838 A1 described.
- WO 2015/158200 A1 , U.S. 2012/326820 A1 , EP 3 214 750 A1 , DE 10 2004 001255 A1 , and DE 10 2009 046570 A1 disclose further inductive components.
- An inductive component which has a core made of soft magnetic material in the form of a ring, which core has a core cross-section, and a winding which surrounds the core and is composed of two electrically conductive sections.
- the sections each have a basic U-shape with two legs, of which the first leg is longer than the second leg and the first leg is curved and towards its end projects away from a plane spanned by the basic U-shape.
- the sections are placed side by side on the core so that the basic U-shape of each section surrounds the core cross-section on three sides.
- the first leg of one section is mechanically and electrically connected to the second leg of the other section.
- the ends of the first leg of one of the sections and the second leg of the other of the sections can be plugged into one another.
- the first leg of one of the sections is flattened at its end and has an opening of a specific shape.
- the second branch of the other of the sections has at its end a shape complementary to the particular shape of the opening, so that the second branch of the other of the sections is inserted in the opening of the first branch of one of the sections.
- a method for producing an inductive component in which two electrically conductive sections are placed next to one another, forming a winding, on a core made of soft magnetic material in the form of a ring and having a core cross section placed on the core so that the basic U-shape of each section surrounds the core cross-section on three sides
- the sections each have a basic U-shape with two legs, of which the first leg is longer than the second leg and the first leg is curved and towards its end stands away from a plane spanned by the basic U-shape.
- the first leg of one section is mechanically and electrically connected to the second leg of the other section.
- the ends of the first leg of one of the sections and the second leg of the other of the sections can be plugged into one another.
- the first leg of one of the sections is flattened at its end and an opening of specified shape is made in the flat.
- the second leg of the other of the sections has at its end a shape complementary to the particular shape of the opening and the second leg of the other of the sections is inserted in the opening of the first leg of one of the sections.
- ring core or just core for short
- connection technique to form a winding become.
- These conductor pieces can be formed, for example, by basically U-shaped or UI-shaped brackets, the type of conductor pieces and the manner of use in detail depending on the spatial structure and the number of connection points.
- the connection technology is easy to implement and inexpensive if only the smallest possible number of connection points is provided and the connection points are on the outer circumference of the toroidal core.
- connection points per turn i.e. exactly one connection point per turn
- this can be achieved, for example, by a U-shaped bracket and a bend after attachment.
- this bending step usually takes place over the edge of the toroidal core, which in turn involves an impermissible action of force on the toroidal core.
- a specially shaped conductor bracket is used, which is placed on the toroidal core and, if necessary, brought into the position for one turn by rotating it with as little force as possible for the toroidal core.
- the toroidal core has, for example, amorphous or nanocrystalline material and, for example, the shape of a ribbon or is made entirely of this.
- the band can have a permeability of between 200 and 150,000 inclusive, for example.
- connection technology is also important. A winding is no longer reliable if there is just one insufficient connection point, up to the point where the entire component fails.
- Each connection point is a combination of a mechanical function, i.e. stable positioning of the conductors, and an electrical function, i.e. establishing and maintaining a permanently low-impedance electrical contact.
- the aim here is an electrical connection point in which the mechanical and electrical functions can be set largely independently or separately from one another.
- N nestable loops each of which forms one turn, can be put together to form a continuous winding with N turns.
- FIG. 13 shows, in a three-dimensional view, an example of such a single bracket 100 in an approximately U-shape, having two terminations 101 and 102 at the ends of two legs 103 and 104 of the U-shape.
- the U-shape of the bracket can be square or round or have any other configuration. A more angular shape with rounded corners is shown.
- the leg 104 of the U-shaped bracket is longer than the other leg 103 and is approximately at the height of the end 101, i.e.
- angles ⁇ , ⁇ may be equal to or around 90 degrees ( ⁇ 45 degrees), such as between 80 degrees and 100 degrees inclusive.
- figure 2 shows the bracket 100 in plan view.
- the two legs 103 and 104 are at a distance a from one another.
- the distance a and thus the opening of the U-shape is dimensioned such that the bracket 100 can be plugged with its opening over a toroidal core with a width b.
- bracket 100 is shown when it has been placed over a toroidal core 300 of width b.
- the length of legs 103 and 104 is determined by height (in figure 3 not shown but in figure 4 shown as height h) of the ring core 300.
- FIG 4 shows a three-dimensional representation of the case in which the bracket 100 and another identical bracket 100 'are placed on the toroidal core 300 and connected to each other.
- a termination 101 of each of the brackets 100 and 100' is in the form of a round rod, while the respective other end 102 of the brackets 100 and 100' is pressed flat and is provided with a (through) opening 400 in the resulting surface , which is complementary to the rod of the conclusion 101 in terms of shape and dimensions, that is to say it corresponds or fits into one another.
- a termination 101 of the bracket 100 is attached to the toroidal core 300 by rotating (with rotatory elastic or non-elastic deformation) the end section of the leg 104 around the other section of the leg 104 in the area of its central bend and by inserting the termination 101 of the Bracket 100 in the opening 400 of the bracket 101', which is also attached to the toroidal core 300, is connected to the latter.
- figure 5 shows an example of a current-compensated choke, i.e. a common-mode interference suppression choke 500 (or another inductive component such as a transformer, choke, etc.), with two (identical) windings 501 and 502 constructed in the manner described above on a toroidal core 503.
- a current-compensated choke i.e. a common-mode interference suppression choke 500 (or another inductive component such as a transformer, choke, etc.)
- two (identical) windings 501 and 502 constructed in the manner described above on a toroidal core 503.
- special end brackets 504 and 505 can be used, each of which is used as the first or last bracket of a winding and which each have an extended (and possibly specially designed) termination 506, as a result of which simpler electrical contacting is made possible.
- the extended, rod-shaped terminations 506 can easily be inserted into holes in a printed circuit board and soldered, welded or clamped there to conductor tracks on the printed circuit board. All the connections between the individual brackets are on the outside of the toroidal core and are therefore easily accessible during manufacture, testing and repair of the component.
- the common-mode interference suppression choke 500 can also have more than two windings, which are then arranged in four sectors of the toroidal core instead of in two.
- the toroidal core encloses an inner circumference and the sections in the inner circumference can have a shape corresponding to segments of a circle, for example to enable closer winding.
- the opening of the U-shape of the bracket are also chosen to be larger than the subsequent distance between the turns.
- the end section of the longer leg 104 can, for example, be rotationally bent from a position X to a position Y, so that a smaller distance c is created between the windings than the distance a, whereby the sector of a turn (or the pitch of the winding) becomes smaller.
- a (non-elastic) bending of the bracket is now necessary, but this takes place in a rotary movement of the wire to the side of the toroidal core (for example, example in the inner opening of the toroid) without significant forces acting on the toroid.
- bracket terminations 101 and 101' shown are produced by a suitable method such as resistance welding, laser welding, soldering, hard soldering, pressing, pressing in, electrically conductive gluing or a wide variety of combinations, or an existing contact (such as by prior pressing in) can be improved.
- the connection points between the stirrups are easy to manufacture due to the exposed, easily accessible position on the outer circumference of the core, but also easy to monitor individually by means of visual inspection and measurement of electrical properties.
- figure 7 shows in detail the connection technology used, for example, in the in figure 4 shown arrangement can be used before connecting, that is, before the nesting.
- the termination 101 of the bracket 100 (not fully shown in figure 7 ) is in turn designed in the form of a round rod, while the respective other end 102 of the bracket 100' (not fully shown in figure 7 ) was pressed flat.
- the (through) opening 400 has again been made in the resulting area, which is complementary to the round rod of the closure 101 in terms of shape and dimensions.
- the end 101 of the bracket 100 should then be inserted and guided through (possibly pressed) perpendicularly to the flattening of the end 101' in its opening 400.
- figure 8 shows a further embodiment, in which the rod-shaped closure 101 has a recess or taper 800, which then results in a form-fitting connection in the opening 400 by pressing together, so that the brackets can be mechanically fixed to one another, and thus possibly for a subsequent (further) Connection process such as welding or soldering no longer have to be maintained.
- figure 9 shows the two in figure 8 separately shown terminations 101 and 102 after mating. By applying pressure F to the sides of the finish 102, compression and consequent non-elastic flexing then occurs. Such a procedure also allows an alternative connection technique by soldering.
- brackets are mechanically connected in the manner shown, but also (sufficiently) electrically connected by pressing them together, a suitable, high electric current can be sent through the entire winding, which heats the brackets by means of Joule heat. Once the soldering temperature has been reached, soldering can be carried out by feeding solder to the contact points. If the solder was applied as a paste to all contact points, it is also possible to simultaneously solder all contacts with a current pulse of a specific duration.
- figure 10 shows an embodiment in which instead of in figure 8 recess or taper 800 shown, an elevation or thickening 1000 is formed on the end 101. Pressing already takes place when the terminations 101 and 102 are plugged together.
- the connection technology that can then be used corresponds largely to that described above.
- the parallel strands are associated with high production costs (long stripping time) and a somewhat larger installation space.
- the technology presented herein provides for dividing the winding into sections, such as straps, that can be clipped (or slid) onto the core and joined together, for example, by automated soldering.
- windings made of solid wire with a larger diameter can be applied to a toroidal core, with the special features of toroidal tape cores such as those made of highly permeable material, which are usually correspondingly sensitive to mechanical influences, being taken into account.
- the technology allows the use of existing cores with existing plastic housings for wire gauges previously not possible due to the stress of winding from the pressure on the toroid.
- this special type of "wrapping" is practically stress-free and energy-free.
- the wire diameter used can be of any size and is theoretically only limited by the inner diameter of the core and the number of stirrup segments used.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
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Description
Die Erfindung betrifft ein Induktives Bauelement und ein Verfahren zu seiner Herstellung.The invention relates to an inductive component and a method for its production.
Bei der Herstellung von Ringkernen und Dickdrahtwicklungen aufweisenden induktiven Bauelementen ist die mechanische Belastung der Ringkerne durch den beim Bewickeln auftretenden Wickelzug hoch. Um ein enges Anliegen der Drähte zu erreichen, muss der Draht beim Durchziehen durch den Ringkern straff gezogen werden. Die dabei auftretenden Kräfte werden im Wesentlichen von den Kanten des Ringkerns aufgenommen. Der Ringkern selbst oder ein diesen umhüllendes Gehäuse muss somit eine entsprechende Festigkeit haben, um Beschädigungen des Ringkerns oder sonstige Beeinträchtigungen zu vermeiden. Da bei zahlreichen Einsatzgebieten Ringkerne ein kleines Volumen aufweisen und hochpermeabel sein sollen, ist das Kernmaterial im Hinblick auf die Magnetostriktion vor darauf einwirkenden Kräften zu schützen. Demnach sollte das Gehäuse oder eine sonstige Umhüllung selbsttragend sein, und die bei der Bewicklung auftretenden Kräfte aufnehmen ohne sich zu verformen und ohne die Kräfte an den Ringkern weiterzugeben. Beispiele für induktive Bauelemente, welche einen Kern und eine Wicklung aus einer Vielzahl von miteinander verbundenen Teilstücken aufweisen, sind in den Publikationen
Problematisch ist es allerdings, Ringkerne in einem üblichen Gehäuse mit dickeren Drähten zu bewickeln beispielsweise für den Einsatz mit höheren Strömen. Bei üblichen Kunststoffgehäusen für Ringkerne mit Wandstärken von 1-2 mm enden die Möglichkeiten zum Bewickeln mit üblichen Wickeltechniken bei Drahtdurchmessern von 2-3 mm Kupferdraht. Um die Verwendung dickerer Drähte zu gestatten, können beispielsweise deutlich festere Kunststoffgehäuse zum Einsatz kommen oder mehradrige Litzen, wie etwa Hochfrequenzlitzen, zum Bewickeln verwendet werden. Stärkere Gehäuse vertragen höhere Zugkräfte, erhöhen meist aber die Kosten und das Bauvolumen. Mehradrige Litzen verbessern die Zugkraftverteilung, haben aber andere Nachteile wie zum Beispiel ein schlechteres Hochfrequenzverhalten durch erhöhte Kapazitäten zwischen den Windungen, höhere Drahtkosten und höhere Kosten für die Anschlusstechnik.However, it is problematic to wind ring cores in a normal housing with thicker wires, for example for use with higher currents. With conventional plastic housings for toroidal cores with a wall thickness of 1-2 mm, the possibilities for winding with conventional winding techniques end with wire diameters of 2-3 mm copper wire. To allow the use of thicker wires, for example significantly stronger plastic housings are used or multi-core strands, such as high-frequency strands, are used for winding. Stronger housings can withstand higher tensile forces, but usually increase the costs and the construction volume. Multi-core strands improve the tensile force distribution, but have other disadvantages such as poorer high-frequency behavior due to increased capacitance between the turns, higher wire costs and higher costs for the connection technology.
Es ist daher wünschenswert, induktive Bauelemente mit empfindlichem Magnetmaterial, die mit den vorhandenen Kunststoffgehäusen und deren Festigkeit verträglich ist, sowie ein Herstellverfahren für solche Ringkerne bereitzustellen.It is therefore desirable to provide inductive components with sensitive magnetic material that is compatible with the existing plastic housings and their strength, as well as a manufacturing method for such toroidal cores.
Es wird ein induktives Bauelement bereit gestellt, das einen einen Kernquerschnitt aufweisenden Kern aus weichmagnetischem Material in Ringform und eine den Kern umgebenden Wicklung, die aus zwei elektrisch leitenden Teilstücken zusammengesetzt ist, aufweist. Die Teilstücke haben jeweils eine U-Grundform mit zwei Schenkeln, von denen der erste Schenkel länger ist als der zweite Schenkel und der erste Schenkel gebogen ist und zu seinem Ende hin von einer durch die U-Grundform aufgespannten Ebene weg steht. Die Teilstücke sind nebeneinander auf den Kern aufgesteckt, so dass die U-Grundform jedes Teilstücks den Kernquerschnitt an drei Seiten umgibt. Der erste Schenkel eines Teilstücks ist mechanisch und elektrisch mit dem zweiten Schenkel des anderen Teilstücks verbunden. Der erste Schenkel eines der Teilstücke und der zweite Schenkel des anderen der Teilstücke sind an ihren Enden ineinander steckbar ausgebildet. Der erste Schenkel des einen der Teilstücke ist an seinem Ende abgeflacht und weist eine Öffnung von bestimmter Form auf. Der zweite Schenkel des anderen der Teilstücke weist an seinem Ende eine zu der bestimmten Form der Öffnung komplementäre Form auf, so dass der zweite Schenkel des anderen der Teilstücke in die Öffnung des ersten Schenkels des einen der Teilstücke eingeführt ist.An inductive component is provided, which has a core made of soft magnetic material in the form of a ring, which core has a core cross-section, and a winding which surrounds the core and is composed of two electrically conductive sections. The sections each have a basic U-shape with two legs, of which the first leg is longer than the second leg and the first leg is curved and towards its end projects away from a plane spanned by the basic U-shape. The sections are placed side by side on the core so that the basic U-shape of each section surrounds the core cross-section on three sides. The first leg of one section is mechanically and electrically connected to the second leg of the other section. The ends of the first leg of one of the sections and the second leg of the other of the sections can be plugged into one another. The first leg of one of the sections is flattened at its end and has an opening of a specific shape. The second branch of the other of the sections has at its end a shape complementary to the particular shape of the opening, so that the second branch of the other of the sections is inserted in the opening of the first branch of one of the sections.
Zudem wird Verfahren zum Herstellen eines induktives Bauelementes bereit gestellt, bei dem auf einen einen Kernquerschnitt aufweisenden Kern aus weichmagnetischem Material in Ringform zwei elektrisch leitende Teilstücke eine Wicklung bildend nebeneinander auf den Kern aufgesteckt werden, so dass die U-Grundform jedes Teilstücks den Kernquerschnitt an drei Seiten umgibt Die Teilstücke haben jeweils eine U-Grundform mit zwei Schenkeln, von denen der erste Schenkel länger ist als der zweite Schenkel und der erste Schenkel gebogen ist und zu seinem Ende hin von einer durch die U-Grundform aufgespannten Ebene weg steht. Der erste Schenkel eines Teilstücks wird mechanisch und elektrisch mit dem zweiten Schenkel des anderen Teilstücks verbunden. Der erste Schenkel eines der Teilstücke und der zweite Schenkel des anderen der Teilstücke sind an ihren Enden ineinander steckbar ausgebildet. Der erste Schenkel des einen der Teilstücke wird an seinem Ende abgeflacht und eine Öffnung von bestimmter Form wird in die Abflachung eingebracht. Der zweite Schenkel des anderen der Teilstücke weist an seinem Ende eine zu der bestimmten Form der Öffnung komplementäre Form auf und der zweite Schenkel des anderen der Teilstücke wird in die Öffnung des ersten Schenkels des einen der Teilstücke eingeführt.In addition, a method for producing an inductive component is provided, in which two electrically conductive sections are placed next to one another, forming a winding, on a core made of soft magnetic material in the form of a ring and having a core cross section placed on the core so that the basic U-shape of each section surrounds the core cross-section on three sides The sections each have a basic U-shape with two legs, of which the first leg is longer than the second leg and the first leg is curved and towards its end stands away from a plane spanned by the basic U-shape. The first leg of one section is mechanically and electrically connected to the second leg of the other section. The ends of the first leg of one of the sections and the second leg of the other of the sections can be plugged into one another. The first leg of one of the sections is flattened at its end and an opening of specified shape is made in the flat. The second leg of the other of the sections has at its end a shape complementary to the particular shape of the opening and the second leg of the other of the sections is inserted in the opening of the first leg of one of the sections.
Der Erfindung wird nachfolgend anhand der in den Figuren der Zeichnung dargestellten Ausführungsbeispiele näher erläutert, wobei ähnliche oder identische Elemente mit denselben Bezugszeichen versehen sind.
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zeigt in dreidimensionaler Ansicht ein beispielhaftes Teilstück zur Verwendung bei einer aus zwei oder mehreren solcher Teilstücke zusammengesetzten Wicklung.Figur 1 -
zeigt in Draufsicht das inFigur 2 gezeigte Teilstück.Figur 1 -
Figur 3 zeigt in Draufsicht das in gezeigte Teilstück, wenn es auf einen Ringkern aufgesteckt ist.Figur 1 -
Figur 4 zeigt in dreidimensionaler Ansicht das in gezeigte Teilstück und ein weiteres Teilstück, wenn sie auf einen Ringkern aufgesteckt und miteinander verbunden sind.Figur 1 -
Figur 5 zeigt in dreidimensionaler Ansicht eine beispielhafte Gleichtakt-Entstördrossel mit zwei aus Teilstücken zusammengesetzten Wicklungen auf einem Ringkern. -
Figur 6 zeigt in dreidimensionaler Ansicht eine alternative Ausgestaltung des inFigur 3 gezeigten Teilstücks auf einem Ringkern zur Erzielung eines verringerten Windungsabstandes. -
Figur 7 zeigt in dreidimensionaler Ansicht die beispielhafte Ausgestaltung der Enden von Teilstücken vor dem Verbinden. -
Figur 8 zeigt in dreidimensionaler Ansicht eine alternative Ausgestaltung der Enden von Teilstücken vor dem Verbinden. -
Figur 9 zeigt in dreidimensionaler Ansicht die inFigur 7 dargestellten Enden von Teilstücken nach dem Verbinden. -
zeigt in dreidimensionaler Ansicht eine weitere alternative Ausgestaltung der Enden von Teilstücken vor dem Verbinden.Figur 10 -
Figur 11 zeigt in einem Impedanz-Frequenz-Diagramm den Vergleich von Messungen einer aus Starkdraht aufgebauten Gleichtakt-Entstördrossel und einer mit den hierin beschriebenen Teilstücken aufgebauten Gleichtakt-Entstördrossel.
-
figure 1 shows in a three-dimensional view an exemplary section for use in a winding composed of two or more such sections. -
figure 2 shows the in top viewfigure 1 part shown. -
figure 3 shows the in top viewfigure 1 Part shown when it is plugged onto a toroidal core. -
figure 4 shows the in three-dimensional viewfigure 1 Part shown and another part when they are plugged onto a toroidal core and connected to each other. -
figure 5 shows a three-dimensional view of an exemplary common-mode interference suppression choke with two windings composed of sections on a toroidal core. -
figure 6 shows a three-dimensional view of an alternative embodiment of thefigure 3 section shown on a toroidal core to achieve a reduced winding spacing. -
figure 7 shows a three-dimensional view of the exemplary configuration of the ends of sections before joining. -
figure 8 shows in a three-dimensional view an alternative configuration of the ends of sections before joining. -
figure 9 shows a three-dimensional view of the infigure 7 illustrated ends of sections after connecting. -
figure 10 shows a further alternative configuration of the ends of sections before joining in a three-dimensional view. -
figure 11 shows in an impedance-frequency diagram the comparison of measurements of a common-mode interference suppression choke constructed from strong wire and a common-mode interference suppression choke constructed with the sections described herein.
Es ist vorgesehen, eine oder mehrere Wicklungen aus vorgebogenen Leiterstücken zusammenzusetzen, die auf oder über einen ringförmigen, weichmagnetischen Kern, im Folgenden allgemein kurz als Ringkern oder nur Kern bezeichnet, gesteckt werden und dann mit einer geeigneten Verbindungstechnik miteinander zu einer Wicklung elektrisch und mechanisch verbunden werden. Diese Leiterstücke können zum Beispiel durch im Grunde U-förmige oder UI-förmige Bügel gebildet werden, wobei die Art der Leiterstücke sowie die Art und Weise der Verwendung im Einzelnen vom räumlichen Aufbau und der Anzahl der Verbindungsstellen abhängt. So ist zum Beispiel die Verbindungstechnik einfach umsetzbar und kostengünstig, wenn nur eine möglichst kleine Anzahl an Verbindungsstellen vorgesehen wird und die Verbindungsstellen am Außenumfang des Ringkerns liegen. Wenn man von der kleinstmöglichen Anzahl an Verbindungsstellen pro Windung, also genau einer Verbindungsstelle pro Windung, ausgeht, kann dies beispielsweise durch eine U-Bügelform und eine Biegung nach dem Aufstecken erreicht werden. Dieser Biegeschritt erfolgt aber üblicher Weise über die Kante des Ringkerns, womit wiederum eine unzulässige Krafteinwirkung auf den Ringkern verbunden ist. Um dies zu verhindern kommt ein speziell geformter Leiterbügel zum Einsatz, der ein Aufstecken auf den Ringkern und gegebenenfalls durch eine für den Ringkern weitestgehend kräftefreie Drehung in die Position für eine Windung gebracht wird. Der Ringkern weist beispielsweise amorphes oder nanokristallines Material und beispielsweise die Form eines Bandes auf oder ist vollständig aus diesem hergestellt. Das Band kann dabei beispielsweise eine Permeabilität zwischen einschließlich 200 und einschließlich 150000 aufweisen.It is intended to assemble one or more windings from pre-bent conductor pieces, which are plugged onto or over a ring-shaped, soft-magnetic core, hereinafter referred to as ring core or just core for short, and then electrically and mechanically connected to one another using a suitable connection technique to form a winding become. These conductor pieces can be formed, for example, by basically U-shaped or UI-shaped brackets, the type of conductor pieces and the manner of use in detail depending on the spatial structure and the number of connection points. For example, the connection technology is easy to implement and inexpensive if only the smallest possible number of connection points is provided and the connection points are on the outer circumference of the toroidal core. If one assumes the smallest possible number of connection points per turn, i.e. exactly one connection point per turn, this can be achieved, for example, by a U-shaped bracket and a bend after attachment. However, this bending step usually takes place over the edge of the toroidal core, which in turn involves an impermissible action of force on the toroidal core. To prevent this, a specially shaped conductor bracket is used, which is placed on the toroidal core and, if necessary, brought into the position for one turn by rotating it with as little force as possible for the toroidal core. The toroidal core has, for example, amorphous or nanocrystalline material and, for example, the shape of a ribbon or is made entirely of this. The band can have a permeability of between 200 and 150,000 inclusive, for example.
Wirtschaftlich bedeutsam ist die Möglichkeit der Verwendung von möglichst wenigen verschieden geformten Drahtbügeln, das heißt, die Anzahl verschiedener Bügelformen kann gering gehalten werden. Darüber hinaus ist aber auch die Verbindungstechnik von Bedeutung. Eine Wicklung ist alleine schon bei einer einzigen nicht ausreichenden Verbindungsstelle nicht mehr zuverlässig bis hin zu einem Ausfall des gesamten Bauelements. Dabei ist jede Verbindungsstelle eine Kombination aus mechanischer Funktion, das heißt, stabiler Positionierung der Leiter, sowie elektrischer Funktion, das heißt, Herstellen und Aufrechterhaltung eines dauerhaft niederohmigen elektrischen Kontaktes. Es wird dabei eine elektrische Verbindungsstelle angestrebt, bei der die mechanischen und elektrischen Funktionen weitgehend unabhängig oder getrennt voneinander eingestellt werden können. Dies wird beispielsweise dadurch erreicht, indem entsprechend ausgebildete Enden benachbarter Bügel ineinander gesteckt werden, so das eine gewisse mechanische Verbindung bereits vorhanden ist, ohne dass eine abschließende elektrische Kontaktierung beispielsweise durch Löten oder Schweißen erfolgt. Zum Beispiel können N in einander steckbare Bügel, von denen jeder jeweils eine Windung bildet, zusammengesteckt eine durchgehende Wicklung mit N Windungen ergeben.The possibility of using as few differently shaped wire hangers as possible is economically significant, ie the number of different hanger shapes can be kept small. The connection technology is also important. A winding is no longer reliable if there is just one insufficient connection point, up to the point where the entire component fails. Each connection point is a combination of a mechanical function, i.e. stable positioning of the conductors, and an electrical function, i.e. establishing and maintaining a permanently low-impedance electrical contact. The aim here is an electrical connection point in which the mechanical and electrical functions can be set largely independently or separately from one another. This is achieved, for example, in that correspondingly designed ends of adjacent brackets are plugged into one another, so that a certain mechanical connection is already present without a final electrical contact being made, for example by soldering or welding. For example, N nestable loops, each of which forms one turn, can be put together to form a continuous winding with N turns.
In
Das Aufstecken kann so erfolgen, dass zunächst der endseitige Abschnitt des Schenkels 104 in die Innenöffnung des Ringkerns 300 in Richtung der Höhe h des Ringkerns 300 ganz eingeführt wird, wobei der die Schenkel verbindende Abschnitt des Bügels 100 in radialer Richtung des Ringkerns 300 verläuft. Der Bügel wird dann um die Längsachse dieses Abschnittes gekippt und schräg zur Breite b des Ringkerns 300 ausgerichtet.It can be plugged on in such a way that first the end section of the
Durch Hinzufügen weiterer Bügel und Verbinden der Bügel - wie oben im Zusammenhang mit
Gemäß einem in
Bei allen vorstehend beschriebenen Ausführungsbeispielen sowie bei allen anderen denkbaren Ausführungsformen kann die elektrische Verbindung der Bügelabschlüsse, beispielsweise der in
Es wurden Vergleichsmessungen an unterschiedlichen Typen von Gleichtakt-Entstördrosseln durchgeführt, deren Ergebnissen aus
Durch die zunehmend höheren Lastströme in Filteranwendungen besteht ein Zwang zu Wicklungen mit immer dickeren Drähten, damit das induktive Bauelement nicht überhitzt. Oberhalb von 3mm Drahtdurchmesser kann die Handbewicklung der Kerne bei solchen Anwendungen nicht mehr wie üblich mittels einer Häkelnadel realisiert werden, da die Wickelkräfte zu hoch für die bewickelnde Person sind und mit zunehmender Windungszahl das Kupfer noch zusätzlich verhärtet. Weiterhin kann der Kunststofftrog die mechanischen Kräfte nicht mehr aufnehmen und der Kern läuft Gefahr deformiert zu werden. Die bisherige Lösung sah vor die Wicklungen mit mehreren parallelen Drähten (engl. Strands) zu versehen. Dabei erhöhen sich jedoch drastisch die Wicklungskapazitäten (Cw) und die Eigenresonanz verschiebt sich zu niedrigeren Frequenzen. Eine Dämpfung oberhalb weniger MHz ist damit nicht mehr möglich. Zudem sind die parallelen Strands mit hohen Fertigungskosten (hohe Abisolierzeit) und einem etwas größeren Bauraum verbunden. Das hierin vorgestellte Technologie sieht eine Aufteilung der Wicklung in Teilstücke wie etwa Bügel vor, die auf den Kern gesteckt (oder geschoben werden) und zum Beispiel mittels automatischem Löten miteinander verbunden werden können.Due to the increasingly higher load currents in filter applications, there is a need for windings with thicker and thicker wires so that the inductive component does not overheat. Above a wire diameter of 3mm, the cores can no longer be wound by hand using a crochet hook in such applications, as the winding forces are too high for the person doing the winding and the copper hardens even more as the number of turns increases. Furthermore, the plastic trough can no longer absorb the mechanical forces and the core runs the risk of being deformed. The previous solution provided the windings with several parallel wires (strands). However, the winding capacitances (Cw) increase drastically and the natural resonance shifts to lower frequencies. Attenuation above a few MHz is therefore no longer possible. In addition, the parallel strands are associated with high production costs (long stripping time) and a somewhat larger installation space. The technology presented herein provides for dividing the winding into sections, such as straps, that can be clipped (or slid) onto the core and joined together, for example, by automated soldering.
Es können somit mit der oben beschriebenen Technologie Wicklungen aus Massivdraht mit größerem Durchmesser auf einem Ringkern aufgebracht werden, wobei auf die Besonderheiten von Ringbandkernen wie beispielsweise solchen aus hochpermeablem Material, welche in der Regel entsprechend empfindlich gegen mechanische Einflüsse sind, Rücksicht genommen werden kann. Ferner gestattet die Technologie die Verwendung von vorhandenen Kernen mit vorhandenen Kunststoffgehäusen für Drahtstärken, die bisher auf Grunde der Belastung beim Bewickeln durch den Druck auf den Ringkern nicht möglich waren. Für den Kern ist diese spezielle Art der "Bewicklung" praktisch stress- und kräftefrei. Der verwendete Drahtdurchmesser kann dabei beliebig groß ausfallen und wird theoretisch erst durch den Innendurchmesser des Kerns und die Anzahl der verwendeten Bügelsegmente begrenzt.With the technology described above, windings made of solid wire with a larger diameter can be applied to a toroidal core, with the special features of toroidal tape cores such as those made of highly permeable material, which are usually correspondingly sensitive to mechanical influences, being taken into account. In addition, the technology allows the use of existing cores with existing plastic housings for wire gauges previously not possible due to the stress of winding from the pressure on the toroid. For the core, this special type of "wrapping" is practically stress-free and energy-free. The wire diameter used can be of any size and is theoretically only limited by the inner diameter of the core and the number of stirrup segments used.
Claims (26)
- An inductive component (500) with:a core (300; 503) made of soft-magnetic material in a ring shape, having a core cross-section, anda winding (501) surrounding the core (300; 503), composed of two electrically conductive sections (100, 100'), whereinthe sections (100, 100') each have a basic U-shape with two legs (103, 104), of which the first leg (104) is longer than the second leg (103) and the first leg (104) is bent and projects away from a plane spanned by the basic U-shape towards its end (102) ;the sections (100, 100') are attached to the core (300; 503) next to one another, so that the basic U-shape of each section (100, 100') surrounds the core cross-section on three sides,the first leg (104) of one section (100) is mechanically and electrically connected to the second leg (103) of the other section (100'),characterized in thatthe first leg (104) of one of the sections (100) and the second leg (103) of the other of the sections (100') are configured to be able to be plugged into one another at their ends (101, 102), andthe first leg (104) of the one of the sections (100) is flattened at its end (102) and has an opening (400) of a specific shape, and the second leg (103) of the other of the sections (100') has a shape complementary to the specific shape of the opening at its end (101), so that the second leg (103) of the other of the sections (100') is inserted into the opening (400) of the first leg (104) of the one of the sections (100).
- The inductive component (500) according to claim 1, in which the first leg (104) projects away - towards its end (102) at two angles - with respect to the plane spanned by the basic U-shape, wherein at least one of the two angles is between 80 degrees and 100 degrees.
- The inductive component (500) according to claim 2, in which at least one of the two angles is 90 degrees.
- The inductive component (500) according to any one of claims 1 to 3, in which the second leg (103) of the other of the sections (100') is inserted into the opening (400) of the first leg (104) of the one of the sections (100) perpendicular to the flattened part.
- The inductive component (500) according to any one of claims 1 to 4, in whichthe opening (400) in the first leg (104) of the one of the sections (100) is configured to be round and has an opening diameter, andthe end (101) of the second leg (103) of the other of the sections (100') is configured in the shape of a round bar with a bar diameter which is slightly less than the opening diameter.
- The inductive component (500) according to claim 5, in which the end (101) of the second leg (103) of the other of the sections (100') is positively pressed into the opening (400) in the first leg (104) of the one of the sections (100).
- The inductive component (500) according to any one of claims 1 to 6, in which the first leg (104) of one of the sections (100) and the second leg (103) of the other of the sections (100') are connected to one another at their ends (101, 102) by at least one connection from the group of soft soldering, hard soldering, welding and electrically conductive bonding.
- The inductive component (500) according to any one of claims 1 to 7, in which the sections (100, 100') are made from round wire.
- The inductive component (500) according to claim 8, in which the round wire has a diameter which is between 2mm and 50mm inclusive.
- The inductive component (500) according to claim 8 or 9, in which the round wire has copper or consists of copper.
- The inductive component (500) according to any one of claims 1 to 10, in which the sections (100, 100') are at least partially encased with an electrically insulating layer.
- The inductive component (500) according to claims 1 to 11, in which the core (300; 503) comprises an amorphous or nanocrystalline ribbon, wherein the ribbon has a permeability of 200-150,000.
- The inductive component (500) according to claims 1 to 12, in which the core (300; 503) is enclosed by an electrically insulating housing of the inductive component.
- The inductive component (500) according to claim 13, in which the housing has plastic or consists of plastic.
- The inductive component (500) according to any one of claims 1 to 14, having at least one additional winding (502) composed of sections or at least one additional section of the one winding or both.
- The inductive component (500) according to claim 15, in which the first and last sections (504, 505) of one of a mentioned winding (501, 502) have first and second legs, respectively, configured for external contacting.
- A method of manufacturing an inductive component (500), in whichto a core (300; 503) made of soft-magnetic material in a ring shape, having a core cross-section, two electrically conductive sections (100, 100') forming a winding (501) are attached to the core (300; 503) next to one another, so that the basic U-shape of each section (100, 100') surrounds the core cross-section on three sides, wherein the sections (100, 100') each have a basic U-shape with two legs (103, 104), of which the first leg (104) is longer than the second leg (103) and the first leg (104) is bent and projects away from a plane spanned by the basic U-shape towards its end (102);the first leg (104) of one section (100) is mechanically and electrically connected to the second leg (103) of the other section (100'),the first leg (104) of one of the sections (100) and the second leg (103) of the other of the sections (100') are configured to be able to be plugged into one another at their ends (101, 102),the first leg (104) of the one of the sections (100) is flattened at its end (102) and an opening (400) of a specific shape is introduced into the flattened part, andthe second leg (103) of the other of the sections (100') has a shape complementary to the specific shape of the opening (400) at its end (101), and the second leg (103) of the other of the sections (100') is inserted into the opening (400) of the first leg (104) of the one of the sections (100).
- The method according to claim 17, in which the first leg (104) projects towards its end (102) at two angles with respect to the plane spanned by the basic U-shape, wherein at least one of the two angles is between 80 degrees and 100 degrees.
- The method according to claim 18, in which at least one of the two angles is 90 degrees.
- The method according to any one of claims 17 to 19, in which the second leg (103) of the other of the sections (100') is inserted into the opening (400) of the first leg (104) of the one of the sections (100) perpendicular to the flattened part.
- The method according to any one of claims 17 to 20, in whichthe opening (400) in the first leg (104) of the one of the sections (100) is configured to be round and has an opening diameter, andthe end (101) of the second leg (103) of the other of the sections (100') is configured in the shape of a round bar with a bar diameter which is slightly less than the opening diameter.
- The method according to claim 21, in which the end (101) of the second leg (103) of the other of the sections (100') is positively pressed into the opening (400) in the first leg (104) of the one of the sections (100).
- The method according to any one of claims 17 to 22, in which the first leg (104) of one of the sections (100) and the second leg (103) of the other of the sections (100') are connected to one another at their ends (101, 102) by at least one connection from the group of soft soldering, hard soldering, welding and electrically conductive bonding.
- The method according to any one of claims 17 to 23, in which the sections are made from round wire.
- The method according to any one of claims 17 to 24, in which the sections (100, 100') are at least partially encased with an electrically insulating layer.
- The method according to any one of claims 17 to 25, in which the first legs (104) of both sections are rotationally twisted in the area of the existing bend at their respective bends after having been attached to the core (300; 503).
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DE102018112975.0A DE102018112975B4 (en) | 2018-05-30 | 2018-05-30 | INDUCTIVE COMPONENT AND METHOD FOR PRODUCING IT |
PCT/EP2019/063805 WO2019229054A1 (en) | 2018-05-30 | 2019-05-28 | Inductive component and method for producing same |
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JP7147803B2 (en) * | 2020-03-16 | 2022-10-05 | 株式会社村田製作所 | Inductor component and manufacturing method thereof |
DE102020134147A1 (en) | 2020-12-18 | 2022-06-23 | Vacuumschmelze Gmbh & Co. Kg | INDUCTIVE COMPONENT WITH MAGNETIC CORE AND WINDING MANUFACTURED BY ADDITIVE MANUFACTURING |
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US2765448A (en) * | 1950-05-26 | 1956-10-02 | Siemens Ag | Saturable switching reactor |
DE8016996U1 (en) * | 1980-06-24 | 1980-09-18 | Radwainski, Herbert, 1000 Berlin | WINDINGS OF CLOSED CORES FOR ELECTRO-MAGNETIC INDUCTION COILS |
IT1222910B (en) | 1987-10-14 | 1990-09-12 | Bassani Spa | WINDING METHOD OF THE COILS OF WINDING A COIL WITH TOROIDAL CORE AND COIL OBTAINED BY SUCH METHOD |
DE102004001255B4 (en) | 2004-01-07 | 2006-04-27 | Vacuumschmelze Gmbh & Co. Kg | Suppression element and method for its production |
US20100253459A1 (en) * | 2009-04-03 | 2010-10-07 | Zimmerman Alan W | Inductor Having Separate Wire Segments |
DE102009046570B4 (en) | 2009-11-10 | 2016-07-28 | Vacuumschmelze Gmbh & Co. Kg | Inductive arrangement and method for producing an inductive arrangement |
TW201301315A (en) | 2011-06-24 | 2013-01-01 | Delta Electronics Inc | Magnetic element |
WO2015158200A1 (en) | 2014-04-14 | 2015-10-22 | 特富特科技(深圳)有限公司 | Fixing device of magnetic element, annular transformer and annular reactor |
JP6648816B2 (en) | 2016-02-15 | 2020-02-14 | 株式会社村田製作所 | Coil component and method for manufacturing coil component |
US20170256354A1 (en) | 2016-03-03 | 2017-09-07 | Hamilton Sundstrand Corporation | Multiple parallel semiconductor switching system including current sharing filter inductor |
DE102016210746B4 (en) * | 2016-06-16 | 2025-02-06 | Vacuumschmelze Gmbh & Co. Kg | Inductive component, current-compensated choke and method for producing an inductive component |
JP6631584B2 (en) * | 2017-04-20 | 2020-01-15 | 株式会社村田製作所 | Inductor and method of manufacturing inductor |
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