EP4042458A1 - Common mode choke - Google Patents

Common mode choke

Info

Publication number
EP4042458A1
EP4042458A1 EP20785719.4A EP20785719A EP4042458A1 EP 4042458 A1 EP4042458 A1 EP 4042458A1 EP 20785719 A EP20785719 A EP 20785719A EP 4042458 A1 EP4042458 A1 EP 4042458A1
Authority
EP
European Patent Office
Prior art keywords
coil
mode choke
common mode
opening
inner conductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20785719.4A
Other languages
German (de)
French (fr)
Inventor
Sebastian Engler
Guido Albert Rasek
Ahmet Kuecuek
Hubert MERZ
Matthias RAFF
Frank BRIELMANN
Dennis BURGER
Mark Hagel
Wolfram Kienle
Konstantin Spanos
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP4042458A1 publication Critical patent/EP4042458A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01F27/2847—Sheets; Strips
    • 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
    • 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
    • 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
    • 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
    • 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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F2017/0093—Common mode choke coil
    • 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
    • H01F2017/065—Core mounted around conductor to absorb noise, e.g. EMI filter
    • 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
    • H01F2017/067—Core with two or more holes to lead through conductor

Definitions

  • the invention relates to a common mode choke.
  • the common mode choke has an in particular magnetically permeable toroidal core and a coil.
  • the common-mode choke has at least one further coil, the coil and the further coil each being arranged in the area of the toroidal core in such a way that a magnetic flux penetrating the coils can detect the toroidal core.
  • EMC electro-magnetic compatibility
  • common-mode chokes have at least two or only two coils, which can interact magnetically with one another via a toroidal core.
  • the coil current in the two coils is preferably conducted in mutually different directions, so that EMC disturbances in the toroidal core magnetically cancel each other out.
  • the toroidal core encloses a preferably cylindrical through-hole.
  • the coils each have at least one or only one electrical inner conductor, in particular a busbar, the inner conductor being arranged in the opening.
  • the inner conductors arranged in the opening together form a shape corresponding to the opening, preferably a cross-sectional shape, and thus jointly fill the opening.
  • the common-mode choke can thus advantageously be designed to be particularly space-saving. This is because it was recognized that the impedance of a common mode choke can be effectively increased if the cross-sectional area of the opening can be fully energized by the inner conductors.
  • the inner conductors each have a cross-section in the shape of a segment of a circle.
  • the particularly cylindrical opening can thus be completely filled by the inner conductor.
  • the coils each have only one coil turn, the inner conductors each being semicircular in cross section for this purpose.
  • the coils each have two coil turns.
  • the inner conductors are preferably each embodied in the form of a quarter segment in cross section. The breakthrough can thus advantageously be filled in to fill space by two coil winding sections in each case.
  • Each inner conductor forms a turn section of a coil turn.
  • the inductance can advantageously be increased quadratically with two or more coil turns.
  • the common mode choke has an electrically insulating holding body.
  • the holding body at least partially encloses the toroidal core and has a hollow cylinder molded onto the holding body, a cavity of the hollow cylinder forming the opening for receiving the inner conductor.
  • the toroidal core can thus advantageously be electrically isolated from the inner conductors.
  • the inner conductors can thus advantageously be designed as solid, in particular uninsulated, metal pieces, in particular copper pieces.
  • the inner conductors are preferably each designed as a straight rod, in particular.
  • the inner conductors can be provided at low cost, for example as an extruded profile or a rolled profile.
  • the inner conductors are each connected at one end, in particular one end face, to a busbar, which is led away from the ends of the inner conductor, in particular at right angles.
  • the busbar is formed, for example, by a stamped grid, also called a leadframe, or by a circuit carrier, in particular a ceramic circuit carrier.
  • the common-mode choke can thus advantageously be provided in a space-saving manner.
  • the inner conductors can thus advantageously be connected with one end face to the busbar in a materially and electrically conductive manner, for example soldered or welded.
  • the busbar can, for example, be formed at an angle leading away from one end, in particular an end face of the inner conductor, at least partially enclosing the toroidal core.
  • the angled busbar can thus advantageously form an outer conductor, with an angled section extending parallel to the inner conductor.
  • the common-mode choke can thus advantageously be reflow-soldered to an end face of the inner conductor with a circuit carrier.
  • the busbar which is electrically conductive, in particular cohesively connected to an opposite end of the inner conductor, can be soldered to the circuit carrier with an end facing away therefrom.
  • the busbar and the inner conductor preferably each have an end which lies in one plane, in particular the circuit carrier plane.
  • the invention also relates to a contact system.
  • the contact system has a common mode choke of the type described above.
  • the contact system preferably comprises an in particular ceramic circuit carrier which has at least one outer electrically conductive layer and at least one electrically insulating layer, in particular a ceramic layer.
  • the circuit carrier is preferably a ceramic circuit carrier in which the electrically insulating layer is formed by a ceramic layer.
  • the electrically conductive layer is preferably a copper layer or an aluminum layer.
  • the electrically conductive layer forms a busbar that is connected to one end of one of the inner conductors.
  • the circuit carrier can thus advantageously form a busbar which forms part of a coil winding, the part being connected to the inner conductor.
  • the busbar can further preferably form a connecting element which electrically connects two coil windings of the same coil to one another.
  • a coil comprising two turns, for example two inner conductors arranged adjacent to one another, which are each arranged in the opening.
  • the inner conductors each form part of a coil winding of the same coil, the coil windings each coupling to the end faces of the inner conductor being guided around the toroidal core at right angles.
  • the parts of the coil winding that are guided around the toroidal core are formed, for example, by a busbar, in particular a stamped grid, which forms an outer conductor.
  • the connection of the coil windings of the same coil to one another to form a serial electrical connection of the same can be formed by means of the conductor rail of the circuit carrier, which contacts an inner conductor.
  • a coil turn can thus comprise an inner conductor, the angled outer conductor and an electrically conductive layer of a circuit carrier, for example an IMS substrate.
  • the inner conductor and the outer conductor are preferably materially connected to a substrate, in particular an IMS substrate, by means of a solder.
  • an end of the inner conductor facing away from the circuit carrier is connected to a busbar, which preferably forms an outer conductor, which is shaped from the rejecting end to lead around the toroidal core and is connected to the circuit carrier.
  • the busbar is preferably formed by a stamped grid or leadframe.
  • a part of the coil winding which is formed by the busbar, in particular the stamped grid can advantageously be provided by a preformed sheet metal part, in particular a sheet copper part, which is attached to an end of the Put on the inner conductor, and there can be soldered or spot-welded to the inner conductor.
  • the choke coil can thus advantageously be provided at low cost.
  • the circuit carrier is connected in a thermally conductive manner to a heat sink at least in the area of the inner conductor and / or the toroidal core.
  • the choke coil is furthermore preferably enclosed between two circuit carriers, in particular of ceramic design, in particular in the manner of a sandwich.
  • the contact arrangement formed in this way can advantageously be connected to a heat sink from both sides of the circuit carrier, in particular from outwardly facing sides of the circuit carrier.
  • TIM Thermal Insulation Material
  • an electrically insulating separating web or a separating wall is arranged between inner conductors that are different from one another.
  • the separating web is, for example, a ceramic web, glass web or plastic web.
  • the separating web is preferably molded onto the holding body. In this way, the holding body can advantageously be designed in one piece together with the separating web as a plastic injection-molded part.
  • the separating web is formed, for example, with a T-shaped or double-T-shaped cross-section, the T-legs each being arranged to at least partially encompass a corner of an inner conductor.
  • the corners of the inner conductors are thus advantageously protected against high-voltage breakdowns or arcing.
  • FIG. 1 shows an exemplary embodiment for a contact arrangement with a common mode choke in a sectional illustration, which is enclosed between two circuit carriers and connected to them;
  • FIG. 2 shows the common mode choke shown in FIG. 1 in a cross-sectional view
  • FIG. 3 shows an embodiment for a common mode choke with two coil windings for each coil of the common mode choke
  • FIG. 4 shows an exemplary embodiment for a common mode choke with three two coil turns for each coil of the common mode choke
  • Figure 5 shows an embodiment for a common mode choke with a rectangular shaped ring core
  • Figure 1 shows an embodiment of a contact arrangement 10.
  • the contact arrangement 10 has a common mode choke 1, which is partially shown in a sectional view.
  • the common mode choke 1 has a toroidal core 2 in the form of a hollow cylinder in this exemplary embodiment, which in this exemplary embodiment is embedded in a plastic jacket 3.
  • the common mode choke 1 also has a cylindrical opening 4.
  • the plastic jacket 3 comprises an outer sleeve 28 surrounding the toroidal core 2 and, in this exemplary embodiment, also extends on an inner wall of the toroidal core 2, so that the plastic jacket on the inside of the toroidal core 2 forms a hollow cylinder 29, in its cavity - and thus also in the opening 4 - the coils, in particular the inner conductor of the common mode choke, can be arranged.
  • the inner conductor 6 forms part of a first coil of the common-mode choke.
  • the inner conductor 7 forms part of a second coil of the common-mode choke.
  • the coils of the common-mode choke each have only one partial turn.
  • the partial turn extends in the opening and from the opening in the ring core 2, which is in particular arranged centrally.
  • the partial turn In contrast to a full turn, which surrounds the toroidal core once, the partial turn only runs towards the inner conductor and leads away from it again after passing through the opening.
  • the contact arrangement 10 also includes two circuit carriers 8 and 9, in particular ceramic-shaped.
  • the common-mode choke 1, in particular the toroidal core 2 and the at least two inner conductors 6 and 7, are in this exemplary embodiment between the circuit carriers 8 and 9 - in particular in the manner of a sandwich - locked in.
  • the circuit carrier 8 comprises an electrically insulating layer 14 and two electrically conductive layers 15 and 16, in particular arranged in one plane, which each form a busbar.
  • the circuit carrier 9 comprises an electrically insulating layer 11 and two electrically conductive layers 12 and 13.
  • the inner conductors 6 and 7 each have two end faces which are each materially connected, in particular soldered, to an electrically conductive layer of one of the circuit carriers.
  • the inner conductor 7 has an end face 23 which is connected to the electrically conductive layer 12. An end of the inner conductor 7 opposite to this is formed by an end face 24 which is materially connected to the electrically conductive layer 15 of the circuit carrier 8.
  • the electrically conductive layers 12 and 15, which each form a busbar, together with the inner conductor 7 form a U-shape which surrounds the toroidal core 2.
  • the inner conductors 12 and 15 thus together with the inner conductor 7 form a coil, of which an electromagnetically effective part in the form of the inner conductor 7 extends in the opening 4.
  • the inner conductor 6 has an end face 25 and an end face 26, which are each formed by ends of the inner conductor 6 facing away from one another.
  • the end face 25 is materially connected to the electrically conductive layer 13, and the end face 26 formed at the other end of the inner conductor is materially connected to the electrically conductive layer 16.
  • the electrically conductive layers 13 and 16, together with the inner conductor 6, thus form a U-shape which surrounds the toroidal core 2 on a circumferential section opposite the inner conductor 7.
  • the circuit carrier 8, in particular the electrically insulating ceramic layer 14, is connected to a heat sink 17 in a thermally conductive manner in this exemplary embodiment.
  • the heat sink 17 has fluid channels for guiding a cooling fluid, of which one cooling channel 18 is designated by way of example.
  • Loss heat 27, which is generated when the inner conductor 6 or the inner conductor 7 is energized, can be conducted from the inner conductors 6 or 7 via the electrically conductive layers 16 or 15, and further via the electrically insulating layer 14, in particular a ceramic layer, to the heat sink 17 .
  • the heat sink 17 is formed, for example, by an aluminum block.
  • both circuit carriers 8 and 9 which enclose the common-mode choke 1 between one another, can each be connected to a heat sink.
  • the coils of the common-mode choke 1 are electrically isolated from one another by an insulating web 5, previously also referred to as a separating web.
  • the common mode choke can thus safely separate a potential of several hundred volts, or between 500 and 1000 volts, which is dropped across the coils, including the inner conductors 6 and 7.
  • the contact arrangement 10 can have only one circuit carrier, for example the circuit carrier 8.
  • the end faces 23 and 25 of the inner conductors 6 and 7, which face away from the circuit carrier 8, can each be connected to a stamped grid or leadframe, which is led from the inner conductor around the toroidal core 2 and as far as the circuit carrier 8 and is connected there to the circuit carrier 8.
  • the common mode choke formed in this way can, for example, be connected to a heat sink and dissipate heat loss to the heat sink via the circuit carrier 8.
  • the lead frame or leadframe can form an outer conductor that connects to the inner conductor and thus forms part of a full turn of the coil.
  • FIG. 2 shows the throttle 1 shown in FIG. 1 in a sectional illustration, the underlying section extending transversely to a longitudinal extension of the opening 4.
  • the toroidal core 2 is at least partially or completely enclosed by the plastic jacket 3.
  • the plastic jacket 3 comprises an outer shell 28 which encloses a lateral surface of the toroidal core 2, which is cylindrically shaped in this exemplary embodiment, and an inner cylinder 29, which extends in an opening formed in the toroidal core 2 and covers an inner wall of the toroidal core.
  • the electrically insulating inner cylinder 29 is designed as a hollow cylinder and encloses the opening 4.
  • the inner conductors 6 and 7 already shown in FIG. 1 are arranged in the opening 4 and extend parallel to one another and along a longitudinal axis 30 already shown in FIG 6 and 7 of the common mode choke 1 each form a coil turn, or in connection with the circuit carriers 8 and 9, a partial turn, the remaining part of the turn being formed by electrically conductive layers of the circuit carrier.
  • the inner conductors 6 and 7 are configured in the shape of a segment of a circle, in particular a semicircle.
  • the opening 4 with the exception of the partition wall 5, can be almost completely or completely through the inner conductors 6 and 7 must be completed in full.
  • the opening 4 is divided by the partition into two sub-spaces 21 and 22, in each of which coils or coil parts that are different from one another or coil parts that differ from one another are arranged.
  • the subspaces 21 and 22 thus represent coils of the common mode choke 1 that are different from one another.
  • FIG. 2 also shows a parting plane 20 which divides the opening 4 into two subspaces 20 and 21, in particular of equal size.
  • the sub-spaces 20 and 21 are each separated from one another by the partition 5, so that the inner conductors 6 and 7, which are each arranged in one of the sub-spaces 20 and 21, are electrically isolated from one another in a breakdown-proof manner.
  • FIG. 3 shows an exemplary embodiment for a common-mode choke 19.
  • the common-mode choke 19 has an opening 4 which is divided into two subspaces 21 and 22 by a partition 39, previously also referred to as a partition.
  • a partition 39 previously also referred to as a partition.
  • parts, in particular turns, of a coil are arranged so that the coil parts, which are each accommodated in a sub-space, are electrically isolated from the coil parts in the sub-space opposite the partition 39.
  • each turn comprises an inner conductor which extends in a partial space of the opening 4.
  • an inner conductor 31 and an inner conductor 32 are arranged in the subspace 21, each of which forms part of a coil turn for a coil of the common mode choke 19.
  • two inner conductors 33 and 34 are arranged, which each form part of a further coil.
  • the remaining parts of the coil winding can be formed by an electrically conductive layer of a circuit carrier and an electrical outer conductor, for example a punched grid, which electrically connect the inner conductors to one another in series in such a way that a coil current flows in the inner conductors of the same coil in the same direction in the opening.
  • the inner conductors 31, 32, 33 and 34 are each formed in cross section in the shape of a segment of a circle, in particular in the shape of a quarter segment.
  • two inner conductors, each formed in the shape of a quarter-circle segment in cross section, can jointly almost completely or completely fill a semicylindrical subspace.
  • two inner conductors can be connected in parallel to one another to form a coil with only one turn.
  • the coil then has at least one, in particular two, inner conductors for each coil turn.
  • FIG. 4 shows an exemplary embodiment for a common mode choke 35.
  • the common mode choke 35 comprises a toroidal core 2 in which an opening 4 is formed.
  • an electrically insulating partition 36 is formed, which divides the cylindrical opening 4 into two, in particular, semi-cylindrical partial spaces 20 and 21.
  • each coil turn of the common mode choke 35 comprises three coil turns, each coil turn comprising an inner conductor as part of the coil turn.
  • the three inner conductors of the coil, which are arranged in the subspace 21, are each formed in the shape of a segment of a circle in cross section, the segments of the circle together forming a semicircle along a radial circumference.
  • the sub-space 22 Opposite the sub-space 21, on the other side of the partition 36, the sub-space 22 is arranged, in which three inner conductors of a further coil are arranged.
  • the further coil thus comprises three coil turns, each coil turn having one of the three inner conductors.
  • One inner conductor 38 of the inner conductors of the further coil is designated by way of example.
  • the opening 4 is completely filled by the inner conductor of the coil and the further coil, and by the partition separating the coils.
  • the Inner conductors of each coil thus form a half-cylinder for this purpose, the inner conductors of both coils, in particular the coil and the further coil, together form a full cylinder.
  • three inner conductors can be connected in parallel to one another to form a coil with only one turn.
  • the coil then has at least one, in particular three, inner conductors for each coil turn.
  • FIG. 5 shows an exemplary embodiment for a choke coil 40.
  • the choke coil 40 has - unlike the choke coils shown in FIGS. 2, 3 and 4 - a rectangularly shaped toroidal core 41.
  • the toroidal core 41 encloses an opening 42.
  • Four inner conductors are arranged in the opening 42, two inner conductors arranged adjacent to one another forming parts of a coil of the common mode choke.
  • a first coil comprises the inner conductors 43 and 44.
  • Another coil comprises the inner conductors 45 and 46.
  • the inner conductors 43 and 44 are separated from the inner conductors of the further coil 45 and 46 by an electrically insulating partition 47.
  • the partition 47 is part of a plastic body in which the toroidal core 41 is at least partially or completely embedded.
  • the inner conductors 43, 44, 45 and 46 each have a rectangular or square cross section in this exemplary embodiment.
  • the toroidal core which has a rectangular or square opening, can advantageously be filled completely by the inner conductor and thus with the best possible use of space.
  • the common-mode choke can thus be implemented in a small installation space with a large inductance.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

The invention relates to a common mode choke (1). The common mode choke (1) has a toroidal core (2), which is in particular magnetically permeable, and a coil. The common mode choke has at least one further coil, wherein the coil and the further coil are each arranged in the region of the toroidal core (2) in such a way that a magnetic flux passing through the coils can detect the toroidal core (2). According to the invention the toroidal core (2) surrounds a preferably cylindrical through-opening (4). For every turn of a coil each coil has at least one or only one electrical internal conductor (31-34), in particular a busbar, the internal conductor (31-34) being arranged in the through-opening (4). The internal conductors (31-34) arranged in the through-opening (4) together form a shape, preferably a cross-sectional shape, corresponding to the through-opening (4), so that together they fill the through-opening (4).

Description

Beschreibung description
Titel title
Gleichtaktdrossel Common mode choke
Stand der Technik State of the art
Die Erfindung betrifft eine Gleichtaktdrossel. Die Gleichtaktdrossel weist einen insbesondere magnetisch permeablen Ringkern, und eine Spule auf. Die Gleichtaktdrossel weist wenigstens eine weitere Spule auf, wobei die Spule und die weitere Spule jeweils derart im Bereich des Ringkerns angeordnet sind, dass ein die Spulen durchsetzender magnetischer Fluss den Ringkern erfassen kann. The invention relates to a common mode choke. The common mode choke has an in particular magnetically permeable toroidal core and a coil. The common-mode choke has at least one further coil, the coil and the further coil each being arranged in the area of the toroidal core in such a way that a magnetic flux penetrating the coils can detect the toroidal core.
Gleichtaktdrosseln werden zur EMV-Entstörung (EMV = Elektro-Magnetische- Verträglichkeit) eingesetzt. Dazu weisen Gleichtaktdrosseln wenigstens zwei oder nur zwei Spulen auf, die über einen Ringkern miteinander in magnetischer Wechselwirkung stehen können. Der Spulenstrom in den zwei Spulen wird bevorzugt in zueinander verschiedene Richtungen geführt, so dass sich EMV- Störungen in dem Ringkern magnetisch einander aufheben. Common mode chokes are used for EMC suppression (EMC = electro-magnetic compatibility). For this purpose, common-mode chokes have at least two or only two coils, which can interact magnetically with one another via a toroidal core. The coil current in the two coils is preferably conducted in mutually different directions, so that EMC disturbances in the toroidal core magnetically cancel each other out.
Offenbarung der Erfindung Disclosure of the invention
Erfindungsgemäß umschließt der Ringkern einen bevorzugt zylinderförmigen Durchbuch. Die Spulen weisen für jede Spulenwindung jeweils wenigstens einen oder nur einen elektrischen Innenleiter, insbesondere eine Stromschiene auf, wobei der Innenleiter in dem Durchbruch angeordnet ist. Die in dem Durchbruch angeordneten Innenleiter bilden gemeinsam eine dem Durchbruch entsprechende Form, bevorzugt Querschnittsform aus und füllen den Durchbruch so gemeinsam aus. Vorteilhaft kann die Gleichtaktdrossel so besonders platzsparend ausgebildet sein. Es wurde nämlich erkannt, dass die Impedanz einer Gleichtaktdrossel wirksam erhöht werden kann, wenn die Querschnittsfläche des Durchbruchs von den Innenleitern voll bestromt werden kann. According to the invention, the toroidal core encloses a preferably cylindrical through-hole. For each coil turn, the coils each have at least one or only one electrical inner conductor, in particular a busbar, the inner conductor being arranged in the opening. The inner conductors arranged in the opening together form a shape corresponding to the opening, preferably a cross-sectional shape, and thus jointly fill the opening. The common-mode choke can thus advantageously be designed to be particularly space-saving. This is because it was recognized that the impedance of a common mode choke can be effectively increased if the cross-sectional area of the opening can be fully energized by the inner conductors.
In einer bevorzugten Ausführungsform weisen die Innenleiter jeweils einen kreissegmentförmigen Querschnitt auf. Vorteilhaft kann der insbesondere zylinderförmige Durchbruch so vollständig durch die Innenleiter ausgefüllt werden. In a preferred embodiment, the inner conductors each have a cross-section in the shape of a segment of a circle. Advantageously, the particularly cylindrical opening can thus be completely filled by the inner conductor.
In einer bevorzugten Ausführungsform weisen die Spulen jeweils nur eine Spulenwindung auf, wobei die Innenleiter dazu jeweils im Querschnitt halbkreisförmig ausgebildet sind. In a preferred embodiment, the coils each have only one coil turn, the inner conductors each being semicircular in cross section for this purpose.
In einer anderen Ausführungsform weisen die Spulen jeweils zwei Spulenwindungen auf. Bevorzugt sind die Innenleiter dazu jeweils im Querschnitt kreisviertelsegmentförmig ausgebildet. Vorteilhaft kann der Durchbruch so platzfüllend durch jeweils zwei Spulenwindungsabschnitte ausgefüllt werden.In another embodiment, the coils each have two coil turns. For this purpose, the inner conductors are preferably each embodied in the form of a quarter segment in cross section. The breakthrough can thus advantageously be filled in to fill space by two coil winding sections in each case.
Jeder Innenleiter bildet dabei einen Windungsabschnitt einer Spulenwindung. Vorteilhaft kann die Induktivität bei zwei oder mehr Spulenwindungen quadratisch gesteigert werden. Each inner conductor forms a turn section of a coil turn. The inductance can advantageously be increased quadratically with two or more coil turns.
In einer bevorzugten Ausführungsform weist die Gleichtaktdrossel einen elektrisch isolierend ausgebildeten Haltekörper auf. Der Haltekörper umschließt den Ringkern wenigstens teilweise und weist einen an den Haltekörper angeformten Hohlzylinder auf, wobei ein Hohlraum des Hohlzylinders den Durchbruch zur Aufnahme der Innenleiter bildet. Vorteilhaft kann der Ringkern so elektrisch von den Innenleitern isoliert sein. Vorteilhaft können die Innenleiter so als massive, insbesondere unisolierte, Metallstücke, insbesondere Kupferstücke, ausgebildet sein. In a preferred embodiment, the common mode choke has an electrically insulating holding body. The holding body at least partially encloses the toroidal core and has a hollow cylinder molded onto the holding body, a cavity of the hollow cylinder forming the opening for receiving the inner conductor. The toroidal core can thus advantageously be electrically isolated from the inner conductors. The inner conductors can thus advantageously be designed as solid, in particular uninsulated, metal pieces, in particular copper pieces.
Die Innenleiter sind bevorzugt jeweils als insbesondere gerader Stab ausgebildet. Dadurch können die Innenleiter aufwandsgünstig, beispielsweise als Strangpressprofil oder Walzprofil bereitgestellt werden. In einer bevorzugten Ausführungsform sind die Innenleiter jeweils mit einem Ende, insbesondere einer Stirnseite, mit einer Stromschiene verbunden, die von den Enden des Innenleiters insbesondere rechtwinklig weggeführt ist. Die Stromschiene ist beispielsweise durch ein Stanzgitter, auch Leadframe genannt, oder durch einen Schaltungsträger, insbesondere einen keramischen Schaltungsträger, gebildet. Vorteilhaft kann die Gleichtaktdrossel so platzsparend bereitgestellt werden. Die Innenleiter können so vorteilhaft mit einer Stirnseite mit der Stromschiene stoffschlüssig und elektrisch leitfähig verbunden, beispielsweise verlötet oder verschweißt sein. Die Stromschiene kann beispielsweise von einem Ende, insbesondere einer Stirnseite des Innenleiters, wegführend, den Ringkern wenigstens teilweise umschließend abgewinkelt gebildet sein. The inner conductors are preferably each designed as a straight rod, in particular. As a result, the inner conductors can be provided at low cost, for example as an extruded profile or a rolled profile. In a preferred embodiment, the inner conductors are each connected at one end, in particular one end face, to a busbar, which is led away from the ends of the inner conductor, in particular at right angles. The busbar is formed, for example, by a stamped grid, also called a leadframe, or by a circuit carrier, in particular a ceramic circuit carrier. The common-mode choke can thus advantageously be provided in a space-saving manner. The inner conductors can thus advantageously be connected with one end face to the busbar in a materially and electrically conductive manner, for example soldered or welded. The busbar can, for example, be formed at an angle leading away from one end, in particular an end face of the inner conductor, at least partially enclosing the toroidal core.
Die abgewinkelte Stromschiene kann so vorteilhaft einen Außenleiter bilden, wobei ein abgewinkelter Abschnitt sich parallel zum Innenleiter erstreckt. The angled busbar can thus advantageously form an outer conductor, with an angled section extending parallel to the inner conductor.
Vorteilhaft kann die Gleichtaktdrossel so mit einer Stirnseite des Innenleiters mit einem Schaltungsträger Reflow-verlötet werden. Die Stromschiene, welche mit einem dazu entgegengesetzten Ende des Innenleiters elektrisch leitfähig, insbesondere stoffschlüssig, verbunden ist, kann mit einem davon abweisenden Ende mit dem Schaltungsträger verlötet werden. Die Stromschiene und der Innenleiter weisen bevorzugt jeweils ein Ende auf, welches in einer Ebene, insbesondere der Schaltungsträgerebene, liegt. The common-mode choke can thus advantageously be reflow-soldered to an end face of the inner conductor with a circuit carrier. The busbar, which is electrically conductive, in particular cohesively connected to an opposite end of the inner conductor, can be soldered to the circuit carrier with an end facing away therefrom. The busbar and the inner conductor preferably each have an end which lies in one plane, in particular the circuit carrier plane.
Die Erfindung betrifft auch ein Kontaktsystem. Das Kontaktsystem weist eine Gleichtaktdrossel gemäß der vorbeschriebenen Art auf. Bevorzugt umfasst das Kontaktsystem einen insbesondere keramischen Schaltungsträger, welcher wenigstens eine äußere elektrisch leitfähige Schicht und wenigstens eine elektrisch isolierende Schicht, insbesondere Keramikschicht, aufweist. The invention also relates to a contact system. The contact system has a common mode choke of the type described above. The contact system preferably comprises an in particular ceramic circuit carrier which has at least one outer electrically conductive layer and at least one electrically insulating layer, in particular a ceramic layer.
Der Schaltungsträger ist bevorzugt ein keramischer Schaltungsträger, bei dem die elektrisch isolierende Schicht durch eine Keramikschicht gebildet ist. Die elektrisch leitfähige Schicht ist bevorzugt eine Kupferschicht oder Aluminiumschicht. Der Schaltungsträger ist bevorzugt ein IMS-Schaltungsträger (IMS =lnsulated-Metal-Substrate), DCB-Schaltungsträger (DCB = Direct-Copper- Bonded), AM B-Schaltungsträger (AMB =Active-Metal-Brazed), LTCC- Schaltungsträger (LTCC = Low-Temperature-Cofired-Ceramics) oder ein HTCC- Schaltungsträger (HTCC = High-Temperature-Cofired-Ceramics). The circuit carrier is preferably a ceramic circuit carrier in which the electrically insulating layer is formed by a ceramic layer. The electrically conductive layer is preferably a copper layer or an aluminum layer. The circuit carrier is preferably an IMS circuit carrier (IMS = Insulated Metal Substrate), DCB circuit carrier (DCB = Direct Copper Bonded), AM B circuit carrier (AMB = Active Metal Brazed), LTCC Circuit carrier (LTCC = Low-Temperature-Cofired-Ceramics) or an HTCC circuit carrier (HTCC = High-Temperature-Cofired-Ceramics).
Die elektrisch leitfähige Schicht bildet eine Stromschiene, die mit einem Ende eines der Innenleiter verbunden ist. Der Schaltungsträger kann so vorteilhaft eine Stromschiene bilden, welche einen Teil einer Spulenwicklung bildet, wobei der Teil mit dem Innenleiter verbunden ist. Die Stromschiene kann weiter bevorzugt ein Verbindungselement bilden, welches zwei Spulenwicklungen derselben Spule miteinander elektrisch verbindet. So kann eine Spule, umfassend zwei Windungen, beispielsweise zwei zueinander benachbart angeordnete Innenleiter, umfassen, welche jeweils in dem Durchbruch angeordnet sind. Die Innenleiter bilden jeweils einen Teil einer Spulenwicklung derselben Spule, wobei die Spulenwicklungen jeweils an den Stirnseiten der Innenleiter ankoppelnd, rechtwinklig um den Ringkern herumgeführt sind. Die um den Ringkern herumgeführten Teile der Spulenwicklung sind beispielsweise durch eine einen Außenleiter bildende Stromschiene, insbesondere Stanzgitter, gebildet. Die Verbindung der Spulenwicklungen derselben Spule untereinander zu einer seriellen elektrischen Verbindung derselben kann mittels der Stromschiene des Schaltungsträgers gebildet sein, welcher einen Innenleiter kontaktiert. The electrically conductive layer forms a busbar that is connected to one end of one of the inner conductors. The circuit carrier can thus advantageously form a busbar which forms part of a coil winding, the part being connected to the inner conductor. The busbar can further preferably form a connecting element which electrically connects two coil windings of the same coil to one another. Thus, a coil comprising two turns, for example two inner conductors arranged adjacent to one another, which are each arranged in the opening. The inner conductors each form part of a coil winding of the same coil, the coil windings each coupling to the end faces of the inner conductor being guided around the toroidal core at right angles. The parts of the coil winding that are guided around the toroidal core are formed, for example, by a busbar, in particular a stamped grid, which forms an outer conductor. The connection of the coil windings of the same coil to one another to form a serial electrical connection of the same can be formed by means of the conductor rail of the circuit carrier, which contacts an inner conductor.
Eine Spulenwindung kann so einen Innenleiter, den abgewinkelten Außenleiter und eine elektrisch leitfähige Schicht eines Schaltungsträgers, beispielsweise IMS-Substrat umfassen. Bevorzugt sind der Innenleiter und der Außenleiter mit einem Substrat, insbesondere IMS-Substrat mittels eines Lotmittels stoffschlüssig verbunden. A coil turn can thus comprise an inner conductor, the angled outer conductor and an electrically conductive layer of a circuit carrier, for example an IMS substrate. The inner conductor and the outer conductor are preferably materially connected to a substrate, in particular an IMS substrate, by means of a solder.
In einer bevorzugten Ausführungsform des Kontaktsystems ist ein von dem Schaltungsträger abweisendes Ende des Innenleiters mit einer Stromschiene, welche bevorzugt einen Außenleiter bildet, verbunden, die von dem abweisenden Ende um den Ringkern außen herumführend geformt ist und mit dem Schaltungsträger verbunden ist. Die Stromschiene ist bevorzugt durch ein Stanzgitter oder Leadframe gebildet. Vorteilhaft kann ein Teil der Spulenwindung, welcher durch die Stromschiene, insbesondere das Stanzgitter, gebildet ist, durch ein vorgeformtes Blechteil, insbesondere Kupferblechteil, bereitgestellt werden, welches auf ein von dem Schaltungsträger abweisendes Ende des Innenleiters aufgesetzt, und dort mit dem Innenleiter verlötet oder punktverschweißt sein kann. Die Drosselspule kann so vorteilhaft aufwandsgünstig bereitgestellt werden. In a preferred embodiment of the contact system, an end of the inner conductor facing away from the circuit carrier is connected to a busbar, which preferably forms an outer conductor, which is shaped from the rejecting end to lead around the toroidal core and is connected to the circuit carrier. The busbar is preferably formed by a stamped grid or leadframe. A part of the coil winding which is formed by the busbar, in particular the stamped grid, can advantageously be provided by a preformed sheet metal part, in particular a sheet copper part, which is attached to an end of the Put on the inner conductor, and there can be soldered or spot-welded to the inner conductor. The choke coil can thus advantageously be provided at low cost.
In einer bevorzugten Ausführungsform des Kontaktsystems ist der Schaltungsträger wenigstens im Bereich des Innenleiters und/oder des Ringkerns mit einer Wärmesenke wärmeleitfähig verbunden. Weiter bevorzugt ist die Drosselspule zwischen zwei insbesondere keramisch ausgebildeten Schaltungsträgern, insbesondere nach Art eines Sandwichs, eingeschlossen. Die so gebildete Kontaktanordnung kann vorteilhaft von beiden Seiten der Schaltungsträger, insbesondere von nach außen weisenden Seiten der Schaltungsträger, mit einer Wärmesenke verbunden werden. In a preferred embodiment of the contact system, the circuit carrier is connected in a thermally conductive manner to a heat sink at least in the area of the inner conductor and / or the toroidal core. The choke coil is furthermore preferably enclosed between two circuit carriers, in particular of ceramic design, in particular in the manner of a sandwich. The contact arrangement formed in this way can advantageously be connected to a heat sink from both sides of the circuit carrier, in particular from outwardly facing sides of the circuit carrier.
Die Wärmesenke, welche beispielsweise mittels eines insbesondere elektrisch isolierenden Wärmeleitmaterials, auch TIM (TIM = Thermal-Insulation-Material) genannt, mit dem Schaltungsträger verbunden werden kann, kann die in der Gleichtaktdrossel erzeugte Verlustwärme besonders effizient abführen. Es wurde nämlich erkannt, dass Verlustwärme zu den Stirnseiten des Innenleiters effizient abgeführt werden kann. Weiter wurde erkannt, dass der Ringkern in der vorbeschriebenen Kontaktanordnung des Kontaktsystems über den Schaltungsträger aufwandsgünstig und effizient entwärmt werden kann. The heat sink, which can be connected to the circuit carrier, for example by means of a particularly electrically insulating heat-conducting material, also called TIM (TIM = Thermal Insulation Material), can dissipate the heat loss generated in the common-mode choke particularly efficiently. This is because it was recognized that heat loss can be efficiently dissipated to the end faces of the inner conductor. It was also recognized that the toroidal core in the above-described contact arrangement of the contact system can be cooled efficiently and inexpensively via the circuit carrier.
In einer bevorzugten Ausführungsform der Gleichtaktdrossel ist zwischen Innenleitern zueinander verschiedener Spulen ein elektrisch isolierender Trennsteg oder eine Trennwand angeordnet. Der Trennsteg ist beispielsweise ein Keramiksteg, Glassteg oder Kunststoffsteg. Bevorzugt ist der Trennsteg an den Haltekörper angeformt. Auf diese Weise kann der Haltekörper gemeinsam mit dem Trennsteg vorteilhaft einstückig als Kunststoffspritzteil ausgebildet sein.In a preferred embodiment of the common mode choke, an electrically insulating separating web or a separating wall is arranged between inner conductors that are different from one another. The separating web is, for example, a ceramic web, glass web or plastic web. The separating web is preferably molded onto the holding body. In this way, the holding body can advantageously be designed in one piece together with the separating web as a plastic injection-molded part.
Der Trennsteg ist beispielsweise in Querschnitt T-förmig oder Doppel-T-förmig gebildet, wobei die T-Schenkel jeweils angeordnet sind, eine Ecke eines Innenleiters wenigstens teilweise zu umgreifen. Die Ecken der Innenleiter sind so vorteilhaft gegen Hochspannungsdurchbrüche oder Funkenüberschlag geschützt. Die Erfindung wird nun im Folgenden anhand von Figuren und weiteren Ausführungsbeispielen beschrieben. Weitere vorteilhafte Ausführungsvarianten ergeben sich aus einer Kombination der in den abhängigen Ansprüchen und in den Figuren beschriebenen Merkmalen. The separating web is formed, for example, with a T-shaped or double-T-shaped cross-section, the T-legs each being arranged to at least partially encompass a corner of an inner conductor. The corners of the inner conductors are thus advantageously protected against high-voltage breakdowns or arcing. The invention will now be described below with reference to figures and further exemplary embodiments. Further advantageous design variants result from a combination of the features described in the dependent claims and in the figures.
Figur 1 zeigt ein Ausführungsbeispiel für eine Kontaktanordnung mit einer Gleichtaktdrossel in einer Schnittdarstellung, die zwischen zwei Schaltungsträgern eingeschlossen und mit diesen verbunden ist; FIG. 1 shows an exemplary embodiment for a contact arrangement with a common mode choke in a sectional illustration, which is enclosed between two circuit carriers and connected to them;
Figur 2 zeigt die in Figur 1 dargestellte Gleichtaktdrossel in einer Querschittdarstellung; FIG. 2 shows the common mode choke shown in FIG. 1 in a cross-sectional view;
Figur 3 zeigt eine Ausführungsform für eine Gleichtaktdrossel mit zwei Spulenwindungen für jede Spule der Gleichtaktdrossel; FIG. 3 shows an embodiment for a common mode choke with two coil windings for each coil of the common mode choke;
Figur 4 zeigt ein Ausführungsbeispiel für eine Gleichtaktdrossel mit drei zwei Spulenwindungen für jede Spule der Gleichtaktdrossel; FIG. 4 shows an exemplary embodiment for a common mode choke with three two coil turns for each coil of the common mode choke;
Figur 5 zeigt ein Ausführungsbeispiel für eine Gleichtaktdrossel mit einem rechteckig geformten Ring kern; Figure 5 shows an embodiment for a common mode choke with a rectangular shaped ring core;
Figur 1 zeigt ein Ausführungsbeispiel für eine Kontaktanordnung 10. Die Kontaktanordnung 10 weist eine Gleichtaktdrossel 1 auf, die teilweise in einer Schnittdarstellung gezeigt ist. Die Gleichtaktdrossel 1 weist einen in diesem Ausführungsbeispiel hohlzylinderförmigen Ringkern 2 auf, welcher in diesem Ausführungsbeispiel in einen Kunststoffmantel 3 eingebettet ist. Figure 1 shows an embodiment of a contact arrangement 10. The contact arrangement 10 has a common mode choke 1, which is partially shown in a sectional view. The common mode choke 1 has a toroidal core 2 in the form of a hollow cylinder in this exemplary embodiment, which in this exemplary embodiment is embedded in a plastic jacket 3.
Die Gleichtaktdrossel 1 weist auch einen zylindrischen Durchbruch 4 auf. Der Kunststoffmantel 3 umfasst eine den Ringkern 2 umschließende Außenhülle 28 und erstreckt sich in diesem Ausführungsbeispiel auch an einer Innenwand des Ringkerns 2, sodass der Kunststoffmantel an der Innenseite des Ringkerns 2 einen Hohlzylinder 29 bildet, in dessen Hohlraum - und so auch im Durchbruch 4 - die Spulen, insbesondere Innenleiter der Gleichtaktdrossel angeordnet sein können. In dem Durchbruch 4 sind wenigstens zwei oder ein ganzzahlig Vielfaches von zwei, in diesem Ausführungsbeispiel nur zwei Innenleiter, nämlich ein Innenleiter 6 und ein Innenleiter 7, angeordnet. Der Innenleiter 6 bildet in diesem Ausführungsbeispiel einen Teil einer ersten Spule der Gleichtaktdrossel. Der Innenleiter 7 bildet in diesem Ausführungsbeispiel einen Teil einer zweiten Spule der Gleichtaktdrossel. Die Spulen der Gleichtaktdrossel weisen in diesem Ausführungsbeispiel jeweils nur eine Teilwindung auf. Die Teilwindung erstreckt sich in diesem Ausführungsbeispiel in dem Durchbruch, und von dem insbesondere zentrisch angeordneten Durchbruch des Ringkerns 2. The common mode choke 1 also has a cylindrical opening 4. The plastic jacket 3 comprises an outer sleeve 28 surrounding the toroidal core 2 and, in this exemplary embodiment, also extends on an inner wall of the toroidal core 2, so that the plastic jacket on the inside of the toroidal core 2 forms a hollow cylinder 29, in its cavity - and thus also in the opening 4 - the coils, in particular the inner conductor of the common mode choke, can be arranged. At least two or an integral multiple of two, in this exemplary embodiment only two inner conductors, namely an inner conductor 6 and an inner conductor 7, are arranged in the opening 4. In this exemplary embodiment, the inner conductor 6 forms part of a first coil of the common-mode choke. In this exemplary embodiment, the inner conductor 7 forms part of a second coil of the common-mode choke. In this exemplary embodiment, the coils of the common-mode choke each have only one partial turn. In this exemplary embodiment, the partial turn extends in the opening and from the opening in the ring core 2, which is in particular arranged centrally.
Anders als bei einer Vollwindung, welche den Ringkern einmal umlaufend umgibt, läuft die Teilwindung nur zu dem Innenleiter hin und führt von diesem nach Durchlaufen des Durchbruchs wieder weg. In contrast to a full turn, which surrounds the toroidal core once, the partial turn only runs towards the inner conductor and leads away from it again after passing through the opening.
Die Kontaktanordnung 10 umfasst in diesem Ausführungsbeispiel auch zwei insbesondere keramisch ausgebildete Schaltungsträger 8 und 9. Die Gleichtaktdrossel 1, insbesondere der Ringkern 2 und die wenigstens zwei Innenleiter 6 und 7, sind in diesem Ausführungsbeispiel zwischen den Schaltungsträgern 8 und 9 - insbesondere nach Art eines Sandwichs - eingeschlossen. In this exemplary embodiment, the contact arrangement 10 also includes two circuit carriers 8 and 9, in particular ceramic-shaped. The common-mode choke 1, in particular the toroidal core 2 and the at least two inner conductors 6 and 7, are in this exemplary embodiment between the circuit carriers 8 and 9 - in particular in the manner of a sandwich - locked in.
Der Schaltungsträger 8 umfasst eine elektrisch isolierende Schicht 14 und zwei - insbesondere in einer Ebene angeordnete - elektrisch leitfähige Schichten 15 und 16, welche jeweils eine Stromschiene bilden. Der Schaltungsträger 9 umfasst eine elektrisch isolierende Schicht 11 und zwei elektrisch leitfähige Schichten 12 und 13. The circuit carrier 8 comprises an electrically insulating layer 14 and two electrically conductive layers 15 and 16, in particular arranged in one plane, which each form a busbar. The circuit carrier 9 comprises an electrically insulating layer 11 and two electrically conductive layers 12 and 13.
Die Innenleiter 6 und 7 weisen jeweils zwei Stirnseiten auf, welche jeweils mit einer elektrisch leitfähigen Schicht eines der Schaltungsträger stoffschlüssig verbunden, insbesondere verlötet sind. The inner conductors 6 and 7 each have two end faces which are each materially connected, in particular soldered, to an electrically conductive layer of one of the circuit carriers.
Der Innenleiter 7 weist dazu eine Stirnseite 23 auf, welche mit der elektrisch leitfähigen Schicht 12 verbunden ist. Ein dazu gegenüberliegendes Ende des Innenleiters 7 ist durch eine Stirnseite 24 gebildet, welche mit der elektrisch leitfähigen Schicht 15 des Schaltungsträgers 8 stoffschlüssig verbunden ist. Die elektrisch leitfähigen Schichten 12 und 15, welche jeweils eine Stromschiene bilden, bilden gemeinsam mit dem Innenleiter 7 eine U-Form, welche den Ringkern 2 umschließt. Die Innenleiter 12 und 15 bilden so gemeinsam mit dem Innenleiter 7 eine Spule, von der sich ein elektromagnetisch wirksamer Teil in Form des Innenleiters 7 in dem Durchbruch 4 erstreckt. For this purpose, the inner conductor 7 has an end face 23 which is connected to the electrically conductive layer 12. An end of the inner conductor 7 opposite to this is formed by an end face 24 which is materially connected to the electrically conductive layer 15 of the circuit carrier 8. The electrically conductive layers 12 and 15, which each form a busbar, together with the inner conductor 7 form a U-shape which surrounds the toroidal core 2. The inner conductors 12 and 15 thus together with the inner conductor 7 form a coil, of which an electromagnetically effective part in the form of the inner conductor 7 extends in the opening 4.
Der Innenleiter 6 weist eine Stirnseite 25 und eine Stirnseite 26 auf, welche jeweils durch zueinander abweisende Enden des Innenleiters 6 gebildet sind. Die Stirnseite 25 ist mit der elektrisch leitfähigen Schicht 13 stoffschlüssig verbunden, und die am anderen Ende des Innenleiters ausgebildete Stirnseite 26 ist mit der elektrisch leitfähigen Schicht 16 stoffschlüssig verbunden. Die elektrisch leitfähigen Schichten 13 und 16 bilden so gemeinsam mit dem Innenleiter 6 eine U-Form, welche den Ringkern 2 auf einem zu dem Innenleiter 7 gegenüberliegenden Umfangsabschnitt umschließt. Der Schaltungsträger 8, insbesondere die elektrisch isolierend ausgebildete Keramikschicht 14, ist in diesem Ausführungsbeispiel mit einer Wärmesenke 17 wärmeleitfähig verbunden. Die Wärmesenke 17 weist in diesem Ausführungsbeispiel Fluidkanäle zum Führen eines Kühlfluids auf, von denen ein Kühlkanal 18 beispielhaft bezeichnet ist. Verlustwärme 27, welche beim Bestromen des Innenleiters 6 oder des Innenleiters 7 erzeugt wird, kann von den Innenleitern 6 beziehungsweise 7 über die elektrisch leitfähigen Schichten 16 beziehungsweise 15, und weiter über die elektrisch isolierende Schicht 14, insbesondere Keramikschicht, zu der Wärmesenke 17 geleitet werden. Die Wärmesenke 17 ist beispielsweise durch einen Aluminiumblock gebildet. The inner conductor 6 has an end face 25 and an end face 26, which are each formed by ends of the inner conductor 6 facing away from one another. The end face 25 is materially connected to the electrically conductive layer 13, and the end face 26 formed at the other end of the inner conductor is materially connected to the electrically conductive layer 16. The electrically conductive layers 13 and 16, together with the inner conductor 6, thus form a U-shape which surrounds the toroidal core 2 on a circumferential section opposite the inner conductor 7. The circuit carrier 8, in particular the electrically insulating ceramic layer 14, is connected to a heat sink 17 in a thermally conductive manner in this exemplary embodiment. In this exemplary embodiment, the heat sink 17 has fluid channels for guiding a cooling fluid, of which one cooling channel 18 is designated by way of example. Loss heat 27, which is generated when the inner conductor 6 or the inner conductor 7 is energized, can be conducted from the inner conductors 6 or 7 via the electrically conductive layers 16 or 15, and further via the electrically insulating layer 14, in particular a ceramic layer, to the heat sink 17 . The heat sink 17 is formed, for example, by an aluminum block.
Anders als in Figur 1 dargestellt, können beide Schaltungsträger 8 und 9, welche die Gleichtaktdrossel 1 zwischeneinander einschließen, jeweils mit einer Wärmesenke verbunden sein. In contrast to what is shown in FIG. 1, both circuit carriers 8 and 9, which enclose the common-mode choke 1 between one another, can each be connected to a heat sink.
Die Spulen der Gleichtaktdrossel 1 sind in diesem Ausführungsbeispiel durch einen Isolationssteg 5, zuvor auch Trennsteg genannt, voneinander elektrisch isoliert. Die Gleichtaktdrossel kann so ein Potenzial von mehreren hundert Volt, oder zwischen 500 und 1000 Volt, welches über den Spulen, umfassend die Innenleiter 6 und 7, abfällt, sicher trennen. Anders als in Figur 1 dargestellt, kann die Kontaktanordnung 10 nur einen Schaltungsträger, beispielsweise den Schaltungsträger 8 aufweisen. Die von dem Schaltungsträger 8 abweisenden Stirnseiten 23 und 25 der Innenleiter 6 beziehungsweise 7 können jeweils mit einem Stanzgitter oder Leadframe verbunden sein, der von dem Innenleiter um den Ringkern 2 herum und bis zu dem Schaltungsträger 8 geführt und dort mit dem Schaltungsträger 8 verbunden ist. Die so gebildete Gleichtaktdrossel kann beispielsweise mit einer Wärmesenke verbunden sein und über den Schaltungsträger 8 Verlustwärme an die Wärmesenke abgeben. So kann durch das Stanzgitter oder den Leadframe ein Außenleiter gebildet sein, der an den Innenleiter anschließt und so einen Teil einer Vollwindung der Spule bildet. In this exemplary embodiment, the coils of the common-mode choke 1 are electrically isolated from one another by an insulating web 5, previously also referred to as a separating web. The common mode choke can thus safely separate a potential of several hundred volts, or between 500 and 1000 volts, which is dropped across the coils, including the inner conductors 6 and 7. In contrast to what is shown in FIG. 1, the contact arrangement 10 can have only one circuit carrier, for example the circuit carrier 8. The end faces 23 and 25 of the inner conductors 6 and 7, which face away from the circuit carrier 8, can each be connected to a stamped grid or leadframe, which is led from the inner conductor around the toroidal core 2 and as far as the circuit carrier 8 and is connected there to the circuit carrier 8. The common mode choke formed in this way can, for example, be connected to a heat sink and dissipate heat loss to the heat sink via the circuit carrier 8. For example, the lead frame or leadframe can form an outer conductor that connects to the inner conductor and thus forms part of a full turn of the coil.
Figur 2 zeigt die in Figur 1 dargestellte Drossel 1 in einer Schnittdarstellung, wobei der zugrundeliegende Schnitt sich quer zu einer Längserstreckung des Durchbruchs 4 erstreckt. FIG. 2 shows the throttle 1 shown in FIG. 1 in a sectional illustration, the underlying section extending transversely to a longitudinal extension of the opening 4.
Der Ringkern 2 ist von dem Kunststoffmantel 3 wenigstens teilweise oder vollständig umschlossen. Der Kunststoffmantel 3 umfasst in diesem Ausführungsbeispiel eine Außenhülle 28, welche eine Mantelfläche des in diesem Ausführungsbeispiel zylindrisch geformten Ringkerns 2 umschließt, und einen Innenzylinder 29, welcher sich in einem in dem Ringkern 2 ausgebildeten Durchbruch erstreckt, und eine Innenwand des Ringkerns bedeckt. The toroidal core 2 is at least partially or completely enclosed by the plastic jacket 3. In this exemplary embodiment, the plastic jacket 3 comprises an outer shell 28 which encloses a lateral surface of the toroidal core 2, which is cylindrically shaped in this exemplary embodiment, and an inner cylinder 29, which extends in an opening formed in the toroidal core 2 and covers an inner wall of the toroidal core.
Der elektrisch isolierend ausgebildete Innenzylinder 29 ist als Hohlzylinder ausgebildet und umschließt den Durchbruch 4. Die in Figur 1 bereits dargestellten Innenleiter 6 und 7 sind in dem Durchbruch 4 angeordnet und erstrecken sich parallel zueinander und entlang einer in Figur 1 bereits dargestellten Längsachse 30. Die Innenleiter 6 und 7 der Gleichtaktdrossel 1 bilden jeweils eine Spulenwindung, oder in Verbindung mit den Schaltungsträgern 8 und 9, eine Teilwindung, wobei ein übriger Teil der Windung durch elektrisch leitfähige Schichten der Schaltungsträger gebildet sind. The electrically insulating inner cylinder 29 is designed as a hollow cylinder and encloses the opening 4. The inner conductors 6 and 7 already shown in FIG. 1 are arranged in the opening 4 and extend parallel to one another and along a longitudinal axis 30 already shown in FIG 6 and 7 of the common mode choke 1 each form a coil turn, or in connection with the circuit carriers 8 and 9, a partial turn, the remaining part of the turn being formed by electrically conductive layers of the circuit carrier.
Die Innenleiter 6 und 7 sind in diesem Ausführungsbeispiel kreissegmentförmig, insbesondere halbkreisförmig, ausgebildet. So kann der Durchbruch 4, die Trennwand 5 ausgenommen, durch die Innenleiter 6 und 7 fast vollständig oder vollständig ausgefüllt werden. Der Durchbruch 4 ist durch die Trennwand in zwei Teilräume 21 und 22 aufgeteilt, in denen jeweils zueinander verschiedene Spulen oder Spulenteile zueinander verschiedener Spulen angeordnet sind. Die Teilräume 21 und 22 repräsentieren somit zueinander verschiedene Spulen der Gleichtaktdrossel 1. In this exemplary embodiment, the inner conductors 6 and 7 are configured in the shape of a segment of a circle, in particular a semicircle. Thus, the opening 4, with the exception of the partition wall 5, can be almost completely or completely through the inner conductors 6 and 7 must be completed in full. The opening 4 is divided by the partition into two sub-spaces 21 and 22, in each of which coils or coil parts that are different from one another or coil parts that differ from one another are arranged. The subspaces 21 and 22 thus represent coils of the common mode choke 1 that are different from one another.
Figur 2 zeigt auch eine Trennebene 20, welche den Durchbruch 4 in zwei insbesondere gleich große Teilräume 20 und 21 aufteilt. Die Teilräume 20 und 21 sind jeweils durch die Trennwand 5 voneinander getrennt, sodass die Innenleiter 6 und 7, welche jeweils in einem der Teilräume 20 beziehungsweise 21 angeordnet sind, durchschlagfest voneinander elektrisch isoliert sind. FIG. 2 also shows a parting plane 20 which divides the opening 4 into two subspaces 20 and 21, in particular of equal size. The sub-spaces 20 and 21 are each separated from one another by the partition 5, so that the inner conductors 6 and 7, which are each arranged in one of the sub-spaces 20 and 21, are electrically isolated from one another in a breakdown-proof manner.
Figur 3 zeigt ein Ausführungsbeispiel für eine Gleichtaktdrossel 19. Die Gleichtaktdrossel 19 weist in diesem Ausführungsbeispiel einen Durchbruch 4 auf, welcher durch eine Trennwand 39, zuvor auch Trennsteg genannt, in zwei Teilräume 21 und 22 aufgeteilt ist. In jedem der Teilräume 21 und 22 sind jeweils Teile, insbesondere Windungen einer Spule angeordnet, sodass die Spulenteile, welche jeweils in einem Teilraum aufgenommen sind, von den Spulenteilen in dem der Trennwand 39 gegenüberliegenden Teilraum elektrisch isoliert sind. FIG. 3 shows an exemplary embodiment for a common-mode choke 19. In this exemplary embodiment, the common-mode choke 19 has an opening 4 which is divided into two subspaces 21 and 22 by a partition 39, previously also referred to as a partition. In each of the sub-spaces 21 and 22, parts, in particular turns, of a coil are arranged so that the coil parts, which are each accommodated in a sub-space, are electrically isolated from the coil parts in the sub-space opposite the partition 39.
Die Spulen der Gleichtaktdrossel 19 weisen in diesem Ausführungsbeispiel jeweils zwei Wndungen auf. Jede Wndung umfasst in diesem Ausführungsbeispiel einen Innenleiter, welcher sich in einem Teilraum des Durchbruchs 4 erstreckt. The coils of the common mode choke 19 each have two turns in this exemplary embodiment. In this exemplary embodiment, each turn comprises an inner conductor which extends in a partial space of the opening 4.
In dem Teilraum 21 sind in diesem Ausführungsbeispiel ein Innenleiter 31 und ein Innenleiter 32 angeordnet, welche jeweils einen Teil einer Spulenwindung für eine Spule der Gleichtaktdrossel 19 bilden. In dem Teilraum 22 sind zwei Innenleiter 33 und 34 angeordnet, welche jeweils einen Teil einerweiteren Spule bilden. Übrige Teile der Spulenwindung können durch eine elektrisch leitfähige Schicht eines Schaltungsträgers und eines elektrischen Außenleiters, beispielsweise Stanzgitter gebildet sein, welche die Innenleiter derart miteinander elektrisch in Serie verbinden, dass ein Spulenstrom in den Innenleitern derselben Spule in dieselbe Richtung in dem Durchbruch fließt. Die Innenleiter 31 , 32, 33 und 34 sind in diesem Ausführungsbeispiel im Querschnitt jeweils kreissegmentförmig, insbesondere kreisviertelsegmentförmig, ausgebildet. Auf diese Weise können zwei im Querschnitt jeweils kreisviertelsegmentförmig ausgebildete Innenleiter gemeinsam einen halbzylinderförmigen Teilraum fast vollständig oder vollständig ausfüllen. In this exemplary embodiment, an inner conductor 31 and an inner conductor 32 are arranged in the subspace 21, each of which forms part of a coil turn for a coil of the common mode choke 19. In the subspace 22, two inner conductors 33 and 34 are arranged, which each form part of a further coil. The remaining parts of the coil winding can be formed by an electrically conductive layer of a circuit carrier and an electrical outer conductor, for example a punched grid, which electrically connect the inner conductors to one another in series in such a way that a coil current flows in the inner conductors of the same coil in the same direction in the opening. In this exemplary embodiment, the inner conductors 31, 32, 33 and 34 are each formed in cross section in the shape of a segment of a circle, in particular in the shape of a quarter segment. In this way, two inner conductors, each formed in the shape of a quarter-circle segment in cross section, can jointly almost completely or completely fill a semicylindrical subspace.
Bei der in Figur 3 dargestellten Spule können zur Bildung einer Spule mit nur einer Windung zwei Innenleiter zueinander parallelgeschaltet sein. Die Spule weist dann für jede Spulenwindung wenigstens einen, insbesondere zwei Innenleiter auf. In the case of the coil shown in FIG. 3, two inner conductors can be connected in parallel to one another to form a coil with only one turn. The coil then has at least one, in particular two, inner conductors for each coil turn.
Figur 4 zeigt ein Ausführungsbeispiel für eine Gleichtaktdrossel 35. Die Gleichtaktdrossel 35 umfasst einen Ringkern 2, in welchem ein Durchbruch 4 ausgebildet ist. In dem Durchbruch 4 ist eine elektrisch isolierende Trennwand 36 ausgebildet, welche den zylinderförmig ausgebildeten Durchbruch 4 in zwei insbesondere halbzylinderförmige Teilräume 20 und 21 aufteilt. FIG. 4 shows an exemplary embodiment for a common mode choke 35. The common mode choke 35 comprises a toroidal core 2 in which an opening 4 is formed. In the opening 4, an electrically insulating partition 36 is formed, which divides the cylindrical opening 4 into two, in particular, semi-cylindrical partial spaces 20 and 21.
In jedem der Teilräume sind Teile einer Spulenwindung derselben Drosselspule aufgenommen. In dem Ausführungsbeispiel gemäß Figur 4 umfasst jede Spulenwindung der Gleichtaktdrossel 35 drei Spulenwindungen, wobei jede Spulenwindung als Teil der Spulenwindung einen Innenleiter umfasst. Die drei Innenleiter der Spule, welche in dem Teilraum 21 angeordnet sind, sind jeweils im Querschnitt kreissegmentförmig ausgebildet, wobei die Kreissegmente gemeinsam entlang eines Radialumlaufs einen Halbkreis bilden. Die Innenleiter, von denen ein Innenleiter 37 beispielhaft bezeichnet ist, bilden so gemeinsam nebeneinander angeordnet in dem Teilraum 21 eine Form eines Halbzylinders. Parts of a coil turn of the same inductor coil are accommodated in each of the sub-spaces. In the exemplary embodiment according to FIG. 4, each coil turn of the common mode choke 35 comprises three coil turns, each coil turn comprising an inner conductor as part of the coil turn. The three inner conductors of the coil, which are arranged in the subspace 21, are each formed in the shape of a segment of a circle in cross section, the segments of the circle together forming a semicircle along a radial circumference. The inner conductors, of which an inner conductor 37 is designated by way of example, thus, arranged together next to one another in the subspace 21, form a shape of a half cylinder.
Zu dem Teilraum 21 gegenüberliegend, jenseits der Trennwand 36, ist der Teilraum 22 angeordnet, in dem drei Innenleiter einerweiteren Spule angeordnet sind. Die weitere Spule umfasst so drei Spulenwindungen, wobei jede Spulenwindung einen der drei Innenleiter aufweist. Von den Innenleitern der weiteren Spule ist ein Innenleiter 38 beispielhaft bezeichnet. Opposite the sub-space 21, on the other side of the partition 36, the sub-space 22 is arranged, in which three inner conductors of a further coil are arranged. The further coil thus comprises three coil turns, each coil turn having one of the three inner conductors. One inner conductor 38 of the inner conductors of the further coil is designated by way of example.
Der Durchbruch 4 ist so durch die Innenleiter der Spule und der weiteren Spule, und durch die die Spulen trennende Trennwand vollständig ausgefüllt. Die Innenleiter jeder Spule bilden so dazu einen Halbzylinder, die Innenleiter beider Spulen, insbesondere der Spule und der weiteren Spule, bilden gemeinsam einen Vollzylinder. The opening 4 is completely filled by the inner conductor of the coil and the further coil, and by the partition separating the coils. The Inner conductors of each coil thus form a half-cylinder for this purpose, the inner conductors of both coils, in particular the coil and the further coil, together form a full cylinder.
Bei der in Figur 4 dargestellten Spule können zur Bildung einer Spule mit nur einer Windung drei Innenleiter zueinander parallelgeschaltet sein. Die Spule weist dann für jede Spulenwindung wenigstens einen, insbesondere drei Innenleiter auf. In the case of the coil shown in FIG. 4, three inner conductors can be connected in parallel to one another to form a coil with only one turn. The coil then has at least one, in particular three, inner conductors for each coil turn.
Figur 5 zeigt ein Ausführungsbeispiel für eine Drosselspule 40. Die Drosselspule 40 weist - anders als die in den Figuren 2, 3 und 4 dargestellten Drosselspulen - einen rechteckig geformten Ringkern 41 auf. Der Ringkern 41 umschließt in diesem Ausführungsbeispiel einen Durchbruch 42. In dem Durchbruch 42 sind vier Innenleiter angeordnet, wobei zwei zueinander benachbart angeordnete Innenleiter Teile einer Spule der Gleichtaktdrossel bilden. FIG. 5 shows an exemplary embodiment for a choke coil 40. The choke coil 40 has - unlike the choke coils shown in FIGS. 2, 3 and 4 - a rectangularly shaped toroidal core 41. In this exemplary embodiment, the toroidal core 41 encloses an opening 42. Four inner conductors are arranged in the opening 42, two inner conductors arranged adjacent to one another forming parts of a coil of the common mode choke.
Eine erste Spule umfasst dabei die Innenleiter 43 und 44. Eine weitere Spule umfasst die Innenleiter 45 und 46. Die Innenleiter 43 und 44 sind von den Innenleitern der weiteren Spule 45 und 46 durch eine elektrisch isolierende Trennwand 47 getrennt. Die Trennwand 47 ist in diesen Beispiel Bestandteil eines Kunststoffkörpers, in welchen der Ringkern 41 wenigstens teilweise oder vollständig eingebettet ist. A first coil comprises the inner conductors 43 and 44. Another coil comprises the inner conductors 45 and 46. The inner conductors 43 and 44 are separated from the inner conductors of the further coil 45 and 46 by an electrically insulating partition 47. In this example, the partition 47 is part of a plastic body in which the toroidal core 41 is at least partially or completely embedded.
Die Innenleiter 43, 44, 45 und 46 weisen in diesem Ausführungsbeispiel jeweils einen rechteckigen oder quadratischen Querschnitt auf. Vorteilhaft kann der Ringkern, welcher einen rechteckigen oder quadratischen Durchbruch aufweist, so durch die Innenleiter vollständig, und so unter bestmöglicher Platzausnutzung, gefüllt sein. Die Gleichtaktdrossel kann so auf einem kleinen Bauraum mit einer großen Induktivität verwirklicht sein. The inner conductors 43, 44, 45 and 46 each have a rectangular or square cross section in this exemplary embodiment. The toroidal core, which has a rectangular or square opening, can advantageously be filled completely by the inner conductor and thus with the best possible use of space. The common-mode choke can thus be implemented in a small installation space with a large inductance.

Claims

Ansprüche Expectations
1. Gleichtaktdrossel (1, 19, 35, 40) mit einem insbesondere magnetisch permeablen Ringkern (2) und wenigstens einer Spule (6, 31, 32, 37) und einer weiteren Spule (7, 31, 32, 38), wobei die Spule (6, 31, 32, 37) und die weitere Spule (7, 31, 32, 38) jeweils derart im Bereich des Ringkerns (2) angeordnet sind, dass ein die Spulen (6, 31, 32, 37, 7, 31, 32, 38) durchsetzender magnetischer Fluss den Ringkern (2) erfasst, dadurch gekennzeichnet, dass der Ringkern (2) einen insbesondere zylinderförmigen Durchbruch (4) umschließt und die Spulen (6, 31, 32, 37, 7, 31, 32, 38) für jede Spulenwindung jeweils wenigstens einen elektrischen Innenleiter (6, 31, 32, 37, 7, 31, 32, 38), insbesondere eine Stromschiene umfassen, welcher in dem Durchbruch (4) angeordnet ist, wobei die in dem Durchbruch (4) angeordneten Innenleiter insbesondere im Querschnitt gemeinsam eine dem Durchbruch (4) entsprechende Form ausbilden und so den Durchbruch (4) gemeinsam ausfüllen. 1. Common mode choke (1, 19, 35, 40) with an in particular magnetically permeable toroidal core (2) and at least one coil (6, 31, 32, 37) and one further coil (7, 31, 32, 38), the Coil (6, 31, 32, 37) and the further coil (7, 31, 32, 38) are each arranged in the area of the ring core (2) in such a way that the coils (6, 31, 32, 37, 7, 31, 32, 38) penetrating magnetic flux detects the toroidal core (2), characterized in that the toroidal core (2) encloses an in particular cylindrical opening (4) and the coils (6, 31, 32, 37, 7, 31, 32 , 38) for each coil turn each comprise at least one electrical inner conductor (6, 31, 32, 37, 7, 31, 32, 38), in particular a busbar, which is arranged in the opening (4), the in the opening ( 4) arranged inner conductor, in particular in cross section, jointly form a shape corresponding to the opening (4) and thus jointly fill the opening (4).
2. Gleichtaktdrossel (1, 19, 35) nach Anspruch 1, dadurch gekennzeichnet, dass die Innenleiter (6, 31, 32, 37, 7, 31, 32, 38) jeweils einen kreissegmentförmigen Querschnitt aufweisen. 2. common mode choke (1, 19, 35) according to claim 1, characterized in that the inner conductors (6, 31, 32, 37, 7, 31, 32, 38) each have a circular segment-shaped cross section.
3. Gleichtaktdrossel (1, 19, 35) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Spulen (21 , 22) jeweils eine Spulenwindung aufweisen und die Innenleiter (6, 7) dazu jeweils im Querschnitt Halbkreisförmig ausgebildet sind. 3. common mode choke (1, 19, 35) according to claim 1 or 2, characterized in that the coils (21, 22) each have a coil turn and the inner conductors (6, 7) are each semicircular in cross section.
4. Gleichtaktdrossel (1, 19, 35) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Spulen (21, 22) jeweils zwei Spulenwindungen aufweisen, wobei die Innenleiter (31, 32, 33, 34) dazu jeweils im Querschnitt Kreisviertelsegmentförmig ausgebildet sind. 4. common mode choke (1, 19, 35) according to claim 1 or 2, characterized in that the coils (21, 22) each have two coil turns, the inner conductors (31, 32, 33, 34) each being designed to be quarter-segment-shaped in cross section.
5. Gleichtaktdrossel (1, 19, 35) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Gleichtaktdrossel (1, 19, 35) einen elektrisch isolierend ausgebildeten Haltekörper (3) aufweist, welcher den Ringkern (2) wenigstens teilweise umschließt und einen an den Haltekörper (3) angeformten Hohlzylinder (29) aufweist, wobei ein Hohlraum des Hohlzylinders (29) den Durchbruch (4) zur Aufnahme der Innenleiter bildet. 5. common mode choke (1, 19, 35) according to any one of the preceding claims, characterized in that the common mode choke (1, 19, 35) has an electrically insulating support body (3) which at least partially encloses the toroidal core (2) and a on the holding body (3) molded hollow cylinder (29), wherein a cavity of the hollow cylinder (29) forms the opening (4) for receiving the inner conductor.
6. Gleichtaktdrossel (1, 19, 35) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Innenleiter jeweils mit einem Ende mit einer Stromschiene verbunden sind, die von den Enden des Innenleiters insbesondere rechtwinklig weggeführt ist. 6. common mode choke (1, 19, 35) according to any one of the preceding claims, characterized in that the inner conductors are each connected at one end to a busbar which is led away from the ends of the inner conductor in particular at right angles.
7. Kontaktanordnung (10) mit einer Gleichtaktdrossel (1, 19, 35) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kontaktanordnung (10) einen insbesondere keramischen Schaltungsträger (8, 9) umfasst, welcher wenigstens eine äußere elektrisch leitfähige Schicht (12, 13, 15, 16) und wenigstens eine elektrisch isolierende Schicht (11, 14) aufweist, wobei die elektrisch leitfähige Schicht (12, 13, 15, 16) eine Stromschiene bildet, die mit einem Ende (23, 24, 25, 26), insbesondere einer Stirnseite eines der Innenleiter (6, 31, 32, 37, 7, 31, 32, 38), verbunden ist. 7. Contact arrangement (10) with a common mode choke (1, 19, 35) according to one of the preceding claims, characterized in that the contact arrangement (10) comprises an in particular ceramic circuit carrier (8, 9) which has at least one outer electrically conductive layer ( 12, 13, 15, 16) and at least one electrically insulating layer (11, 14), the electrically conductive layer (12, 13, 15, 16) forming a busbar which, with one end (23, 24, 25, 26), in particular one end face of one of the inner conductors (6, 31, 32, 37, 7, 31, 32, 38) is connected.
8. Kontaktanordnung (10) nach Anspruch 7, dadurch gekennzeichnet, dass ein von dem Schaltungsträger abweisendes Ende des Innenleiters (23, 25) mit einer Stromschiene verbunden ist, die von dem abweisenden Ende (23, 25) um den Ringkern (2) außen herumführend geformt ist und mit dem Schaltungsträger (8) verbunden ist. 9. Kontaktanordnung (10) nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Schaltungsträger (8, 8. Contact arrangement (10) according to claim 7, characterized in that one end of the inner conductor (23, 25) facing away from the circuit carrier is connected to a busbar which extends from the rejecting end (23, 25) around the toroidal core (2) on the outside is shaped leading around and is connected to the circuit carrier (8). 9. Contact arrangement (10) according to claim 7 or 8, characterized in that the circuit carrier (8,
9) wenigstens im Bereich des Innenleiters (6, 31, 32, 37, 7, 31 , 32, 38), und/oder des Ringkerns (2) mit einer Wärmesenke (17) wärmeleitfähig verbunden ist. 9) is connected in a thermally conductive manner to a heat sink (17) at least in the area of the inner conductor (6, 31, 32, 37, 7, 31, 32, 38) and / or the ring core (2).
10. Kontaktanordnung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen Innenleitern (6, 31, 32, 37, 7, 31, 32, 38) zueinander verschiedener Spulen (21, 22) ein elektrisch isolierender Trennsteg (5, 39, 47) angeordnet ist. 10. Contact arrangement (10) according to one of the preceding claims, characterized in that between inner conductors (6, 31, 32, 37, 7, 31, 32, 38) mutually different coils (21, 22) an electrically insulating separating web (5, 39, 47) is arranged.
EP20785719.4A 2019-10-10 2020-09-30 Common mode choke Pending EP4042458A1 (en)

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DE102019215514.6A DE102019215514A1 (en) 2019-10-10 2019-10-10 Common mode choke
PCT/EP2020/077281 WO2021069266A1 (en) 2019-10-10 2020-09-30 Common mode choke

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FR2428308A1 (en) * 1978-06-08 1980-01-04 Mayer Ferdy DIFFERENTIAL TRANSFORMER OF ELECTRICAL PROTECTION RELAYS
DE4221769C1 (en) * 1992-07-02 1994-01-27 Abb Patent Gmbh Producing inductive constructional component - winding at least one winding around magnet core emerging from floor plate and core plate between which are vertical metal bar groups.
DE10223995C1 (en) * 2002-05-29 2003-11-27 Epcos Ag Coil body for annular choke coil has wire guide devices at its ends for maintaining wire windings in required pattern
JP4905828B2 (en) * 2006-07-14 2012-03-28 Ｔｄｋラムダ株式会社 Inductance element
US7961071B2 (en) * 2008-10-20 2011-06-14 Eaton Corporation Multiphase inductor and filter assemblies using bundled bus bars with magnetic core material rings
EP2977996A1 (en) * 2014-07-21 2016-01-27 Siemens Aktiengesellschaft Choke coil of a power converter
DE102016210746A1 (en) * 2016-06-16 2017-12-21 Vacuumschmelze Gmbh & Co. Kg Inductive component, current-compensated inductor and method for producing an inductive component
JP6617306B2 (en) * 2016-06-21 2019-12-11 株式会社エス・エッチ・ティ Common mode choke coil
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EP3483905B1 (en) * 2017-11-10 2020-07-15 ABB Schweiz AG Choke
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DE102018215576A1 (en) * 2018-09-13 2020-03-19 Bayerische Motoren Werke Aktiengesellschaft Current-compensated choke, filter, high-voltage electrical system and motor vehicle

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