EP2502243B1 - Device for electrical isolation and toroidal core choke - Google Patents

Device for electrical isolation and toroidal core choke Download PDF

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Publication number
EP2502243B1
EP2502243B1 EP10778665.9A EP10778665A EP2502243B1 EP 2502243 B1 EP2502243 B1 EP 2502243B1 EP 10778665 A EP10778665 A EP 10778665A EP 2502243 B1 EP2502243 B1 EP 2502243B1
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EP
European Patent Office
Prior art keywords
toroidal core
portions
insulating regions
central region
webs
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EP10778665.9A
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German (de)
French (fr)
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EP2502243A2 (en
Inventor
Günter FEIST
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TDK Electronics AG
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Epcos AG
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    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • 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
    • 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
    • H01F41/12—Insulating of windings
    • H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil

Definitions

  • the invention relates to a device for potential separation for installation in a core hole of a toroidal core.
  • the application relates to a toroidal core choke, which has a toroidal core, a device for potential separation and at least two windings electrically insulated from one another by the device.
  • Ring core chokes with arranged on a toroidal windings are widely known.
  • the problem basically arises of electrically separating the individual windings from one another.
  • the device for potential separation described therein comprises a central part and three outwardly extending, elastically deformable webs which can be wound around the middle part and each have a rigid insulating region at their end facing away from the middle part. By rotating the central part relative to the insulating regions, the device is adapted to the inner diameter of different toroidal cores.
  • the object of the present invention is to describe an easily manufactured and to be mounted device for potential separation for installation in a core hole of a toroidal core, wherein the device should be adapted to compensate for tolerances in the diameter of the core hole of the toroidal core.
  • the device should also be suitable for stable installation in the core hole of a toroidal core with only two windings.
  • a cylindrical reference system is used to denote the different directions.
  • the direction from the center of a core hole in the direction of the circumference of a toroidal core is referred to as radial
  • the direction of the rotational axis of symmetry of the toroidal core as axial
  • the direction orthogonal in each point to these two directions as tangential.
  • the device has a central region and two insulating regions projecting from the central region in the radial direction of the core hole and movable in the radial direction.
  • the central region has a compression zone with at least two mutually parallel first sections of two webs, which mechanically couple the two insulating regions together.
  • Each of the at least two first sections is elastically deformable S-shaped, wherein the at least two first portions of the two webs are arranged parallel to each other in the relaxed state of the compression zone.
  • each of the two webs further each having a second portion, wherein the at least two first portions and the two second portions of the two webs in the relaxed state of the compression zone form the sides of a parallelogram.
  • Such, preferably centrally arranged rhomboid allows kink-free compression of the compression zone.
  • the at least two first portions have a smaller material thickness than the second portions, so that upon movement of the insulating regions in the radial direction, at least two of the first portions are deformed in an S-shape and the second portions are displaced substantially parallel to each other.
  • the device is integrally formed.
  • it can be particularly simple and inexpensively manufactured as an injection molded part.
  • the device has two with respect to the central region opposite insulating regions, so that the device has the shape of a compressible in length web.
  • An embodiment of the device in the form of a longitudinally compressible separating web with two opposing insulating regions is particularly suitable for use in toroidal core chokes with two windings, for example for a line filter with a phase conductor and a neutral conductor.
  • the insulating regions protrude beyond an associated part of the central region in the tangential direction of the core hole. In this way, a desired insulation distance between adjacent windings of the toroidal core can be adjusted independently of the material thickness of the device for potential separation in the central region.
  • the insulating regions each have a cavity.
  • the use of a cavity allows for material savings in the formation of insulating regions having a relatively large insulation distance.
  • the device has at least one holding part with at least one latching element for latching the device with a holder for receiving the toroidal core choke.
  • a holding part allows the locking of the toroidal core choke on a circuit board or in a similar arrangement for mechanical fixation of Toroidal choke.
  • the end faces of the insulating regions facing the toroidal core have nose-shaped projections for latching the toroidal core into the device.
  • a locking of the ring core between nose-shaped projections of an end face allows a secure, adhesive-free attachment of the device in the toroidal core.
  • a toroidal core choke comprising a toroidal core, a device for potential separation according to one of the above-mentioned embodiments and at least two electrically isolated from each other by the device for electrical isolation windings.
  • the central region of the potential separation device is stretched by compression of the compression zone and exerts an elastic force on the two insulating regions in the radial direction of the toroidal core.
  • FIG. 1 shows a front view of a toroidal core choke on the plane spanned by the toroidal core of the throttle.
  • the toroidal core choke 1 comprises a toroidal core 2 and two windings 3a and 3b which are electrically insulated from one another.
  • the windings 3a and 3b are, for example, choke coils in a power supply line to a single-phase power supply network with a phase conductor and a neutral conductor.
  • the toroidal core choke 1 further comprises a potential separation device 4.
  • the device 4 is fitted in the core hole 5 of the toroidal core 2.
  • FIG. 2 shows a perspective view of the toroidal core choke 1 according to FIG. 1
  • the exemplary embodiment is a toroidal core choke 1 for standing mounting on a printed circuit board.
  • the device 4 described below for potential separation is also suitable for use with other types of toroidal core chokes 1, in particular also for horizontal mounting.
  • FIGS. 3A and 3B show detailed front views of the device 4 for potential separation according to the first embodiment in the relaxed or compressed state.
  • the device 4 comprises in each case two insulating regions 6a and 6b at the upper or lower end of the web-shaped device 4.
  • the insulating regions 6a and 6b are connected to one another by a central region 7.
  • the central region 7 comprises in each case a holding part 8a and 8b which adjoin the insulating regions 6a and 6b, respectively, and a central compression zone 9 arranged between the holding parts 8a and 8b.
  • the compression zone 9 can be compressed in the radial direction of the toroidal core choke 1, So in the FIG. 3A in the vertical direction.
  • each of the webs 10a and 10b has a first portion 11a and 11b and a second portion 12a and 12b, respectively.
  • the webs 10a and 10b are made of an elastic material and can therefore be deformed under the action of force.
  • the entire device 4 is produced as a one-piece plastic injection-molded part. Prefers If the material used is a heat-resistant and flame-retardant plastic.
  • the webs 10a and 10b are configured point-symmetrical with respect to the center of the device 4 and the center of the core hole 5 in the built-in device 4 state.
  • Their sections 11a, 11b, 12a and 12b include in the illustrated projection a cavity and form in the in the FIG. 3A illustrated relaxed state a parallelogram.
  • the first portions 11a and 11b have a lower material thickness than the second material portions 12a and 12b.
  • the first portions 11a and 11b are easier to elastically deform with respect to the second portions 12a and 12b.
  • the central region 7 is compressed.
  • a compression of the central region 7 leads to a deformation of the webs 10a and 10b, as shown in the FIG. 3B is shown.
  • the first portions 11a and 11b of the webs 10a and 10b deform S-shaped.
  • the second portions 12a and 12b are displaced relative to each other in the direction of the radial axis. However, they remain largely dimensionally stable.
  • S-shaped deformable first portions 11 between the second portions 12 are arranged.
  • the in the FIG. 3B shown compression has the advantage that a radial compression of the insulating regions 6a and 6b leads to a parallel displacement of the longitudinal axes in the region of the holding parts 8a and 8b, so that a movement the insulating regions 6a and 6b takes place predominantly in the radial direction.
  • the central area 7 does not buckle laterally.
  • outwardly acting force allows a tight fit of the device 4 with only two insulating regions 6 in a ring core 2 of a toroidal core choke. 1
  • the insulating regions 6 protrude in a tangential direction beyond the holding parts 8 of the central region 7 and in this way produce a desired insulation distance between the adjacent windings 3a and 3b.
  • the insulating regions 6a and 6b in the illustrated embodiment each have a cavity 13a and 13b, respectively.
  • FIG. 4 shows a side view of the device 4 in the plane spanned by the axial and radial directions.
  • the holding parts 8 are configured on both sides with locking elements 14 in the embodiment.
  • the locking elements 14 allow a secure locking of the device 4 with a not shown in the figures, substantially U-shaped bracket for receiving the toroidal core choke 1 on a circuit board.
  • the locking elements 14 of the area A are in the lower part of FIG. 4 shown enlarged.
  • FIG. 5 shows a side view of a device 4 according to a second embodiment. Also the side view according to FIG. 5 shows the plane spanned by the axial and radial directions of a toroidal core 2.
  • the insulating regions 6a and 6b according to the second embodiment have at their end faces in each case two nose-shaped projections 15, which the device 4 in the inserted state with in the FIG. 5 interlock ring core 2, not shown.
  • the compression zone 9 exerts an elastic force on the end faces of the insulating regions 6, which leads to a locking of the ring core 2 in the recesses between the projections 15 and a separate attachment, such as a bonding of the device 4 with the toroidal core 2, dispensable ,
  • the shape and number of the insulating regions can be adapted to the requirements of toroidal core chokes with different windings.

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

Description

Die Erfindung betrifft eine Vorrichtung zur Potentialtrennung zum Einbau in ein Kernloch eines Ringkerns. Darüber hinaus betrifft die Anmeldung eine Ringkerndrossel, die einen Ringkern, eine Vorrichtung zur Potentialtrennung sowie wenigstens zwei durch die Vorrichtung elektrisch voneinander isolierte Wicklungen aufweist.The invention relates to a device for potential separation for installation in a core hole of a toroidal core. In addition, the application relates to a toroidal core choke, which has a toroidal core, a device for potential separation and at least two windings electrically insulated from one another by the device.

Ringkerndrosseln mit auf einem Ringkern angeordneten Wicklungen sind vielfach bekannt. Bei Ringkerndrosseln mit mehreren Wicklungen stellt sich dabei grundsätzlich das Problem, die einzelnen Wicklungen elektrisch voneinander zu trennen.Ring core chokes with arranged on a toroidal windings are widely known. In the case of toroidal core chokes with several windings, the problem basically arises of electrically separating the individual windings from one another.

Ein Ansatz besteht darin, die Drähte einzelner Wicklungen elektrisch zu isolieren. Dies ist jedoch verhältnismäßig teuer und führt zu einer Erhöhung des Platzbedarfs.One approach is to electrically insulate the wires of individual windings. However, this is relatively expensive and leads to an increase in space requirements.

Aus der EP 1797572 B1 sind eine Vorrichtung zur Potentialtrennung, eine Ringkerndrossel und ein Verfahren zur Herstellung einer Ringkerndrossel bekannt. Die dort beschriebene Vorrichtung zur Potentialtrennung umfasst ein Mittelteil sowie drei nach außen verlaufende, elastisch verformbare und um das Mittelteil aufwickelbare Stege, die jeweils an ihrem vom Mittelteil abgewandten Ende einen starren Isolierbereich aufweisen. Durch Verdrehung des Mittelteils gegenüber den Isolierbereichen wird die Vorrichtung an den Innendurchmesser von unterschiedlichen Ringkernen angepasst.From the EP 1797572 B1 are a device for potential separation, a toroidal core choke and a method for producing a toroidal core choke known. The device for potential separation described therein comprises a central part and three outwardly extending, elastically deformable webs which can be wound around the middle part and each have a rigid insulating region at their end facing away from the middle part. By rotating the central part relative to the insulating regions, the device is adapted to the inner diameter of different toroidal cores.

Bei der bekannten Vorrichtung sind für eine korrekte Positionierung und Sicherung der Vorrichtung mindestens drei Stege erforderlich. Sie eignet sich daher insbesondere nicht für Ringkerndrosseln mit nur zwei Wicklungen, wie sie insbesondere beim Einsatz in Netzfiltern vielfach verwendet werden.In the known device at least three webs are required for correct positioning and securing of the device. It is therefore particularly not suitable for Ring core chokes with only two windings, as they are often used in particular when used in mains filters.

Aufgabe der vorliegenden Erfindung ist es, eine einfach herzustellende und zu montierende Vorrichtung zur Potentialtrennung zum Einbau in ein Kernloch eines Ringkerns zu beschreiben, wobei die Vorrichtung dazu geeignet sein soll, Toleranzen im Durchmesser des Kernlochs des Ringkerns auszugleichen. Bevorzugt soll die Vorrichtung auch zum stabilen Einbau in das Kernloch eines Ringkerns mit nur zwei Wicklungen geeignet sein.The object of the present invention is to describe an easily manufactured and to be mounted device for potential separation for installation in a core hole of a toroidal core, wherein the device should be adapted to compensate for tolerances in the diameter of the core hole of the toroidal core. Preferably, the device should also be suitable for stable installation in the core hole of a toroidal core with only two windings.

In der folgenden Zusammenfassung von Ausgestaltungen und detaillierten Beschreibung von Ausführungsbeispielen wird zur Bezeichnung der unterschiedlichen Richtungen ein zylindrisches Bezugssystem verwendet. Dabei wird die Richtung vom Mittelpunkt eines Kernlochs in Richtung auf den Umfang eines Ringkerns als radial, die Richtung der Drehsymmetrieachse des Ringkerns als axial und die in jedem Punkt zu diesen beiden Richtungen orthogonale Richtung als tangential bezeichnet.In the following summary of embodiments and detailed description of embodiments, a cylindrical reference system is used to denote the different directions. In this case, the direction from the center of a core hole in the direction of the circumference of a toroidal core is referred to as radial, the direction of the rotational axis of symmetry of the toroidal core as axial and the direction orthogonal in each point to these two directions as tangential.

Die oben genannte Aufgabe wird durch eine Vorrichtung zur Potentialtrennung zum Einbau in ein Kernloch eines Ringkerns gemäß Patentanspruch 1 gelöst.The above object is achieved by a device for electrical isolation for installation in a core hole of a toroidal core according to claim 1.

Die Vorrichtung weist einen Zentralbereich und zwei aus dem Zentralbereich in radialer Richtung des Kernlochs herausragende und in der radialen Richtung bewegliche Isolierbereiche auf. Der Zentralbereich weist eine Stauchungszone mit mindestens zwei zueinander parallelen ersten Abschnitten von zwei Stegen auf, die die zwei Isolierbereiche mechanisch miteinander koppeln. Jeder der mindestens zwei ersten Abschnitte ist elastisch S-förmig verformbar, wobei die mindestens zwei ersten Abschnitte der zwei Stege im entspannten Zustand der Stauchungszone zueinander parallel angeordnet sind.The device has a central region and two insulating regions projecting from the central region in the radial direction of the core hole and movable in the radial direction. The central region has a compression zone with at least two mutually parallel first sections of two webs, which mechanically couple the two insulating regions together. Each of the at least two first sections is elastically deformable S-shaped, wherein the at least two first portions of the two webs are arranged parallel to each other in the relaxed state of the compression zone.

Durch Verwendung paralleler, elastisch S-förmig verformbarer erster Abschnitte kann eine radiale Bewegung der Isolierbereiche in eine Verformung der zwei ersten Abschnitte im Bereich der Stauchungszone umgewandelt werden. Hierdurch bewirken die zwei Stege, die die zwei Isolierbereiche mechanisch miteinander koppeln, eine Komprimierung der Stauchungszone in radialer Richtung. Somit vermag eine derartige Vorrichtung etwaige Toleranzen im Innendurchmesser des Ringkerns auszugleichen.By using parallel, elastic S-shaped deformable first sections, a radial movement of the insulating regions can be converted into a deformation of the two first sections in the region of the compression zone. As a result, the two webs which mechanically couple the two insulating regions together cause compression of the compression zone in the radial direction. Thus, such a device can compensate for any tolerances in the inner diameter of the toroidal core.

Gemäß einer vorteilhaften Ausgestaltung weist jeder der zwei Stege des Weiteren jeweils einen zweiten Abschnitt auf, wobei die mindestens zwei ersten Abschnitte und die zwei zweiten Abschnitte der zwei Stege im entspannten Zustand der Stauchungszone die Seiten eines Parallelogramms bilden. Ein derartiger, bevorzugt zentral angeordneter Rhomboid ermöglicht eine knickfreie Kompression der Stauchungszone.According to an advantageous embodiment, each of the two webs further each having a second portion, wherein the at least two first portions and the two second portions of the two webs in the relaxed state of the compression zone form the sides of a parallelogram. Such, preferably centrally arranged rhomboid allows kink-free compression of the compression zone.

Gemäß einer weiteren vorteilhaften Ausgestaltung weisen die mindestens zwei ersten Abschnitte eine geringere Materialstärke auf als die zweiten Abschnitte, sodass bei einer Bewegung der Isolierbereiche in radialer Richtung mindestens zwei die ersten Abschnitte S-förmig verformt werden und die zweiten Abschnitte im Wesentlichen parallel zueinander verschoben werden. Durch die beschriebene Ausgestaltung wird eine asymmetrische Kompression der Stauchungszone bewirkt, die eine sichere Führung der Bewegung der Isolierbereiche der Vorrichtung in radialer Richtung sicherstellt.According to a further advantageous embodiment, the at least two first portions have a smaller material thickness than the second portions, so that upon movement of the insulating regions in the radial direction, at least two of the first portions are deformed in an S-shape and the second portions are displaced substantially parallel to each other. By the described embodiment, an asymmetric compression of the compression zone is effected, which ensures a secure guidance of the movement of the insulating regions of the device in the radial direction.

Gemäß einer vorteilhaften Ausgestaltung ist die Vorrichtung einstückig ausgebildet. Somit kann sie auf besonders einfache und kostengünstige Weise als Spritzgussteil hergestellt werden.According to an advantageous embodiment, the device is integrally formed. Thus, it can be particularly simple and inexpensively manufactured as an injection molded part.

Gemäß einer weiteren vorteilhaften Ausgestaltung weist die Vorrichtung zwei sich bezüglich des Zentralbereichs gegenüberliegende Isolierbereiche auf, so dass die Vorrichtung die Gestalt eines in der Länge komprimierbaren Steges aufweist. Eine Ausgestaltung der Vorrichtung in Form eines in der Länge komprimierbaren Trennstegs mit zwei sich gegenüberliegenden Isolierbereichen eignet sich insbesondere für den Einsatz bei Ringkerndrosseln mit zwei Wicklungen, zum Beispiel für einen Netzfilter mit einem Phasenleiter und einem Neutralleiter.According to a further advantageous embodiment, the device has two with respect to the central region opposite insulating regions, so that the device has the shape of a compressible in length web. An embodiment of the device in the form of a longitudinally compressible separating web with two opposing insulating regions is particularly suitable for use in toroidal core chokes with two windings, for example for a line filter with a phase conductor and a neutral conductor.

Gemäß einer weiteren vorteilhaften Ausgestaltung ragen die Isolierbereiche über einen damit verbundenen Teil des Zentralbereiches in tangentialer Richtung des Kernlochs hinaus. Hierdurch kann ein gewünschter Isolierabstand zwischen benachbarten Wicklungen des Ringkerns unabhängig von der Materialdicke der Vorrichtung zur Potentialtrennung im Zentralbereich eingestellt werden.According to a further advantageous embodiment, the insulating regions protrude beyond an associated part of the central region in the tangential direction of the core hole. In this way, a desired insulation distance between adjacent windings of the toroidal core can be adjusted independently of the material thickness of the device for potential separation in the central region.

Gemäß einer weiteren Ausgestaltung weisen die Isolierbereiche jeweils einen Hohlraum auf. Die Verwendung eines Hohlraums gestattet eine Materialeinsparung bei der Ausformung von Isolierbereichen mit einem verhältnismäßig großen Isolierabstand.According to a further embodiment, the insulating regions each have a cavity. The use of a cavity allows for material savings in the formation of insulating regions having a relatively large insulation distance.

Gemäß einer weiteren Ausgestaltung weist die Vorrichtung wenigstens ein Halteteil mit wenigstens einem Rastelement zur Verrastung der Vorrichtung mit einer Halterung zur Aufnahme der Ringkerndrossel auf. Ein derartiges Halteteil erlaubt das Verrasten der Ringkerndrossel auf einer Leiterplatte oder in einer ähnlichen Anordnung zur mechanischen Fixierung der Ringkerndrossel.According to a further embodiment, the device has at least one holding part with at least one latching element for latching the device with a holder for receiving the toroidal core choke. Such a holding part allows the locking of the toroidal core choke on a circuit board or in a similar arrangement for mechanical fixation of Toroidal choke.

Gemäß einer weiteren Ausgestaltung weisen die dem Ringkern zugewandten Stirnflächen der Isolierbereiche nasenförmige Vorsprünge zum Einrasten des Ringkerns in die Vorrichtung auf. Ein Einrasten des Ringkerns zwischen nasenförmige Vorsprünge einer Stirnfläche gestattet eine sichere, klebstofffreie Befestigung der Vorrichtung in dem Ringkern.In accordance with a further embodiment, the end faces of the insulating regions facing the toroidal core have nose-shaped projections for latching the toroidal core into the device. A locking of the ring core between nose-shaped projections of an end face allows a secure, adhesive-free attachment of the device in the toroidal core.

Die oben genannte Aufgabe wird ebenso durch eine Ringkerndrossel aufweisend einen Ringkern, eine Vorrichtung zur Potentialtrennung gemäß einer der oben genannten Ausgestaltungen sowie wenigstens zwei durch die Vorrichtung zur Potentialtrennung elektrisch voneinander isolierte Wicklungen gelöst. Der Zentralbereich der Vorrichtung zur Potentialtrennung ist durch eine Komprimierung der Stauchungszone gespannt und übt eine elastische Kraft auf die zwei Isolierbereiche in radialer Richtung des Ringkerns aus. Mittels der Vorspannung der Vorrichtung zur Potentialtrennung durch Komprimierung der Stauchungszone kann ein wirksamer Toleranzausgleich an den Innendurchmesser des Ringkerns erreicht werden.The above object is also achieved by a toroidal core choke comprising a toroidal core, a device for potential separation according to one of the above-mentioned embodiments and at least two electrically isolated from each other by the device for electrical isolation windings. The central region of the potential separation device is stretched by compression of the compression zone and exerts an elastic force on the two insulating regions in the radial direction of the toroidal core. By means of the bias of the device for potential separation by compression of the compression zone, an effective tolerance compensation to the inner diameter of the toroidal core can be achieved.

Weitere vorteilhafte Ausgestaltungen sind in der nachfolgenden ausführlichen Beschreibung von Ausführungsbeispielen sowie in den Patentansprüchen angegeben.Further advantageous embodiments are given in the following detailed description of exemplary embodiments and in the patent claims.

Im Folgenden wird die Erfindung anhand von Ausführungsbeispielen und dazugehörigen Figuren näher erläutert. Die Figuren zeigen schematische und nicht maßstabsgetreue Darstellungen unterschiedlicher Ausführungsbeispiele.In the following the invention will be explained in more detail by means of exemplary embodiments and associated figures. The figures show schematic and not to scale representations of different embodiments.

Es zeigen:

Figur 1
eine Vorderansicht einer Ringkerndrossel gemäß einem ersten Ausführungsbeispiel der Erfindung,
Figur 2
eine perspektivische Darstellung der Ringkerndrossel gemäß Figur 1,
Figuren 3A und 3B
Vorderansichten einer Vorrichtung zur Potentialtrennung gemäß dem ersten Ausführungsbeispiel im entspannten beziehungsweise komprimierten Zustand,
Figur 4
eine Seitenansicht der Vorrichtung zur Potentialtrennung gemäß Figur 3B und
Figur 5
eine Seitenansicht einer Vorrichtung zur Potentialtrennung gemäß einem zweiten Ausführungsbeispiel.
Show it:
FIG. 1
a front view of a toroidal core choke according to a first embodiment of the invention,
FIG. 2
a perspective view of the toroidal core choke according to FIG. 1 .
FIGS. 3A and 3B
Front views of a device for potential separation according to the first embodiment in the relaxed or compressed state,
FIG. 4
a side view of the device for potential separation according to FIG. 3B and
FIG. 5
a side view of a device for potential separation according to a second embodiment.

Figur 1 zeigt eine Vorderansicht auf eine Ringkerndrossel auf die durch den Ringkern der Drossel aufgespannte Ebene. FIG. 1 shows a front view of a toroidal core choke on the plane spanned by the toroidal core of the throttle.

Die Ringkerndrossel 1 umfasst einen Ringkern 2 sowie zwei elektrisch voneinander isolierte Wicklungen 3a und 3b. Bei den Wicklungen 3a und 3b handelt es sich beispielsweise um Drosselspulen in einer Netzzuleitung zu einem einphasigen Stromversorgungsnetz mit einem Phasenleiter und einem Neutralleiter.The toroidal core choke 1 comprises a toroidal core 2 and two windings 3a and 3b which are electrically insulated from one another. The windings 3a and 3b are, for example, choke coils in a power supply line to a single-phase power supply network with a phase conductor and a neutral conductor.

Um die Wicklungen 3a und 3b elektrisch voneinander zu isolieren, umfasst die Ringkerndrossel 1 des Weiteren eine Vorrichtung 4 zur Potentialtrennung. Die Vorrichtung 4 ist in das Kernloch 5 des Ringkerns 2 eingepasst.In order to electrically insulate the windings 3a and 3b from each other, the toroidal core choke 1 further comprises a potential separation device 4. The device 4 is fitted in the core hole 5 of the toroidal core 2.

Figur 2 zeigt eine perspektivische Ansicht der Ringkerndrossel 1 gemäß Figur 1. Im Ausführungsbeispiel handelt es sich um eine Ringkerndrossel 1 zur stehenden Montage auf einer gedruckten Leiterplatte. Selbstverständlich eignet sich die im Folgenden beschriebene Vorrichtung 4 zur Potentialtrennung auch zur Verwendung mit anderen Bauformen von Ringkerndrosseln 1, insbesondere auch zur liegenden Montage. FIG. 2 shows a perspective view of the toroidal core choke 1 according to FIG. 1 , The exemplary embodiment is a toroidal core choke 1 for standing mounting on a printed circuit board. Of course, the device 4 described below for potential separation is also suitable for use with other types of toroidal core chokes 1, in particular also for horizontal mounting.

Die Figuren 3A und 3B zeigen detaillierte Vorderansichten auf die Vorrichtung 4 zur Potentialtrennung gemäß dem ersten Ausführungsbeispiel im entspannten beziehungsweise komprimierten Zustand.The FIGS. 3A and 3B show detailed front views of the device 4 for potential separation according to the first embodiment in the relaxed or compressed state.

Die Vorrichtung 4 umfasst jeweils zwei Isolierbereiche 6a und 6b am oberen beziehungsweise unteren Ende der stegförmig ausgeführten Vorrichtung 4. Die Isolierbereiche 6a und 6b sind durch einen Zentralbereich 7 miteinander verbunden. Der Zentralbereich 7 umfasst im dargestellten Ausführungsbeispiel jeweils ein Halteteil 8a und 8b, die sich an die Isolierbereiche 6a beziehungsweise 6b anschließen, sowie eine zwischen den Halteteilen 8a und 8b angeordnete zentrale Stauchungszone 9. Die Stauchungszone 9 lässt sich in radialer Richtung der Ringkerndrossel 1 komprimieren, also in der Figur 3A in vertikaler Richtung.The device 4 comprises in each case two insulating regions 6a and 6b at the upper or lower end of the web-shaped device 4. The insulating regions 6a and 6b are connected to one another by a central region 7. In the exemplary embodiment illustrated, the central region 7 comprises in each case a holding part 8a and 8b which adjoin the insulating regions 6a and 6b, respectively, and a central compression zone 9 arranged between the holding parts 8a and 8b. The compression zone 9 can be compressed in the radial direction of the toroidal core choke 1, So in the FIG. 3A in the vertical direction.

Hierzu weist die in den Figuren 3A und 3B dargestellte Stauchungszone 9 zwei Stege 10a und 10b auf. Jeder der Stege 10a und 10b weist einen ersten Abschnitt 11a beziehungsweise 11b und einen zweiten Abschnitt 12a beziehungsweise 12b auf. Die Stege 10a und 10b bestehen aus einem elastischen Material und können daher unter Krafteinwirkung verformt werden.For this purpose, the points in the FIGS. 3A and 3B shown compression zone 9 two webs 10a and 10b. Each of the webs 10a and 10b has a first portion 11a and 11b and a second portion 12a and 12b, respectively. The webs 10a and 10b are made of an elastic material and can therefore be deformed under the action of force.

Im Ausführungsbeispiel ist die gesamte Vorrichtung 4 als einstückiges Kunststoffspritzgussteil hergestellt. Bevorzugt handelt es sich bei dem verwendeten Material um einen hitzebeständigen und schwerentflammbaren Kunststoff.In the exemplary embodiment, the entire device 4 is produced as a one-piece plastic injection-molded part. Prefers If the material used is a heat-resistant and flame-retardant plastic.

Die Stege 10a und 10b sind punktsymmetrisch bezüglich des Mittelpunkts der Vorrichtung 4 sowie des Mittelpunktes des Kernlochs 5 im in die Vorrichtung 4 eingebauten Zustand ausgestaltet. Deren Abschnitte 11a, 11b, 12a und 12b schließen in der dargestellten Projektion einen Hohlraum ein und bilden im in der Figur 3A dargestellten entspannten Zustand ein Parallelogramm. Dabei weisen die ersten Abschnitte 11a und 11b eine geringere Materialstärke auf als die zweiten Materialabschnitte 12a und 12b. In Folge dessen lassen sich die ersten Abschnitte 11a und 11b bezogen auf die zweiten Abschnitte 12a und 12b leichter elastisch verformen.The webs 10a and 10b are configured point-symmetrical with respect to the center of the device 4 and the center of the core hole 5 in the built-in device 4 state. Their sections 11a, 11b, 12a and 12b include in the illustrated projection a cavity and form in the in the FIG. 3A illustrated relaxed state a parallelogram. In this case, the first portions 11a and 11b have a lower material thickness than the second material portions 12a and 12b. As a result, the first portions 11a and 11b are easier to elastically deform with respect to the second portions 12a and 12b.

Durch ein Zusammendrücken der Isolierbereiche 6a und 6b, etwa beim Einsetzen der Vorrichtung 4 in einen Ringkern 2, wird der Zentralbereich 7 komprimiert. Eine Kompression des Zentralbereichs 7 führt dabei zu einer Verformung der Stege 10a und 10b, wie sie in der Figur 3B dargestellt ist. Dabei verformen sich die ersten Abschnitte 11a und 11b der Stege 10a beziehungsweise 10b S-förmig. Die zweiten Abschnitte 12a und 12b werden relativ zueinander in Richtung der radialen Achse verschoben. Dabei bleiben sie jedoch weitgehend formstabil.By compressing the insulating regions 6a and 6b, for example when inserting the device 4 in a toroidal core 2, the central region 7 is compressed. A compression of the central region 7 leads to a deformation of the webs 10a and 10b, as shown in the FIG. 3B is shown. In this case, the first portions 11a and 11b of the webs 10a and 10b deform S-shaped. The second portions 12a and 12b are displaced relative to each other in the direction of the radial axis. However, they remain largely dimensionally stable.

Zur Erhöhung der von der Stauchungszone 9 ausgeübten Federwirkung, sind in einer weiteren, nicht dargestellten Ausführungsform weitere, S-förmig verformbare erste Abschnitte 11 zwischen den zweiten Abschnitten 12 angeordnet.To increase the force exerted by the compression zone 9 spring action, in a further, not shown embodiment further, S-shaped deformable first portions 11 between the second portions 12 are arranged.

Die in der Figur 3B dargestellte Kompression weist den Vorteil auf, dass eine radiale Kompression der Isolierbereiche 6a und 6b zu einer parallelen Verschiebung der Längsachsen im Bereich der Halteteile 8a und 8b führt, sodass eine Bewegung der Isolierbereiche 6a und 6b überwiegend in radialer Richtung stattfindet. Insbesondere knickt der Zentralbereich 7 nicht seitlich ein. Zusammen mit der durch die Stauchungszone 9 erzeugten, nach außen wirkenden Kraft ermöglicht dies einen festen Sitz der Vorrichtung 4 mit nur zwei Isolierbereichen 6 in einem Ringkern 2 einer Ringkerndrossel 1.The in the FIG. 3B shown compression has the advantage that a radial compression of the insulating regions 6a and 6b leads to a parallel displacement of the longitudinal axes in the region of the holding parts 8a and 8b, so that a movement the insulating regions 6a and 6b takes place predominantly in the radial direction. In particular, the central area 7 does not buckle laterally. Together with the force generated by the compression zone 9, outwardly acting force allows a tight fit of the device 4 with only two insulating regions 6 in a ring core 2 of a toroidal core choke. 1

Wie in den Figuren 3A und 3B dargestellt, ragen die Isolierbereiche 6 in tangentialer Richtung über die Halteteile 8 des Zentralbereichs 7 hinaus und stellen auf diese Weise einen gewünschten Isolierabstand zwischen den benachbarten Wicklungen 3a und 3b her. Um dennoch eine einfache und Material sparende Herstellung der Vorrichtung 4 durch ein Spritzgussverfahren zu ermöglichen, weisen die Isolierbereiche 6a und 6b im dargestellten Ausführungsbeispiel jeweils einen Hohlraum 13a beziehungsweise 13b auf.As in the FIGS. 3A and 3B shown, the insulating regions 6 protrude in a tangential direction beyond the holding parts 8 of the central region 7 and in this way produce a desired insulation distance between the adjacent windings 3a and 3b. In order nevertheless to enable a simple and material-saving production of the device 4 by an injection molding process, the insulating regions 6a and 6b in the illustrated embodiment each have a cavity 13a and 13b, respectively.

Figur 4 zeigt eine Seitenansicht der Vorrichtung 4 auf die durch die axiale und radiale Richtung aufgespannte Ebene. FIG. 4 shows a side view of the device 4 in the plane spanned by the axial and radial directions.

In der Figur 4 ist zu erkennen, dass die Halteteile 8 im Ausführungsbeispiel beidseitig mit Rastelementen 14 ausgestaltet sind. Die Rastelemente 14 ermöglichen dabei eine sichere Verrastung der Vorrichtung 4 mit einer in den Figuren nicht dargestellten, im Wesentlichen U-förmigen Halterung zur Aufnahme der Ringkerndrossel 1 auf einer Leiterplatte. Die Rastelemente 14 des Bereichs A sind im unteren Teil der Figur 4 vergrößert dargestellt.In the FIG. 4 It can be seen that the holding parts 8 are configured on both sides with locking elements 14 in the embodiment. The locking elements 14 allow a secure locking of the device 4 with a not shown in the figures, substantially U-shaped bracket for receiving the toroidal core choke 1 on a circuit board. The locking elements 14 of the area A are in the lower part of FIG. 4 shown enlarged.

Figur 5 zeigt eine Seitenansicht einer Vorrichtung 4 gemäß einem zweiten Ausführungsbeispiel. Auch die Seitenansicht gemäß Figur 5 zeigt die durch die axiale und radiale Richtung eines Ringkerns 2 aufgespannte Ebene. FIG. 5 shows a side view of a device 4 according to a second embodiment. Also the side view according to FIG. 5 shows the plane spanned by the axial and radial directions of a toroidal core 2.

In der Figur 5 ist zu erkennen, dass die Isolierbereiche 6a und 6b gemäß dem zweiten Ausführungsbeispiel an ihren Stirnflächen jeweils zwei nasenförmige Vorsprünge 15 aufweisen, die die Vorrichtung 4 im eingesetzten Zustand mit dem in der Figur 5 nicht dargestellten Ringkern 2 verzahnen. Dabei übt die Stauchungszone 9 eine elastische Kraft auf die Stirnflächen der Isolierbereiche 6 aus, die zu einem Einrasten des Ringkerns 2 in die Vertiefungen zwischen den Vorsprüngen 15 führt und eine gesonderte Befestigung, wie etwa ein Verkleben der Vorrichtung 4 mit dem Ringkern 2, entbehrlich macht.In the FIG. 5 It can be seen that the insulating regions 6a and 6b according to the second embodiment have at their end faces in each case two nose-shaped projections 15, which the device 4 in the inserted state with in the FIG. 5 interlock ring core 2, not shown. In this case, the compression zone 9 exerts an elastic force on the end faces of the insulating regions 6, which leads to a locking of the ring core 2 in the recesses between the projections 15 and a separate attachment, such as a bonding of the device 4 with the toroidal core 2, dispensable ,

Die Erfindung ist nicht auf die in den Figuren dargestellten und oben im Detail beschriebenen Ausführungsbeispiele beschränkt. Insbesondere können die Gestalt und Anzahl der Isolierbereiche an die Anforderungen von Ringkerndrosseln mit unterschiedlichen Wicklungen angepasst werden.The invention is not limited to the embodiments shown in the figures and described in detail above. In particular, the shape and number of the insulating regions can be adapted to the requirements of toroidal core chokes with different windings.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
RingkerndrosselToroidal choke
22
Ringkerntoroidal
33
Wicklungwinding
44
Vorrichtung zur PotentialtrennungDevice for potential separation
55
Kernlochcore hole
66
Isolierbereichisolation
77
ZentralbereichCentral area
88th
Halteteilholding part
99
StauchungszoneCompression zone
1010
Stegweb
1111
erster Abschnittfirst section
1212
zweiter Abschnittsecond part
1313
Hohlraumcavity
1414
Rastelementlocking element
1515
Vorsprunghead Start

Claims (10)

  1. Device (4) for electrical isolation to be installed in a core hole (5) of a toroidal core (2), having a central region (7) and two insulating regions (6) projecting out of the central region (7) in the radial direction of the core hole (5) and movable in the radial direction,
    - the central region (7) having a compression zone (9) with at least two mutually parallel first portions (11) of two webs (10),
    - the two webs (10) coupling the two insulating regions (6) to one another mechanically,
    - each of the at least two first portions (11) being deformable elastically in an S-shaped manner, and
    - the at least two first portions (11) of the two webs (10) being arranged parallel to one another in the expanded state of the compression zone (9).
  2. Device (4) according to Claim 1, characterized in that each of the two webs (10) has, furthermore, in each case a second portion (12), the at least two first portions (11) and the two second portions (12) of the two webs (10) forming the sides of a parallelogram in the expanded state of the compression zone (9).
  3. Device (4) according to Claim 2, characterized in that each of the at least two first portions (11) have a smaller material thickness than the two second portions (12), so that, in the event of movement of the insulating regions (6) in the radial direction, the at least two first portions (11) are deformed in an S-shaped manner and the second portions (12) are displaced essentially parallel to one another.
  4. Device (4) according to one of Claims 1 to 3, characterized in that the device (4) is formed in one piece.
  5. Device (4) according to one of Claims 1 to 4, characterized in that the device (4) has two insulating regions (6) lying opposite one another with respect to the central region (7), so that the device (4) is in the form of a longitudinally compressible web.
  6. Device (4) according to one of Claims 1 to 5, characterized in that the insulating regions (6) project beyond a part, connected thereto, of the central region (7) in the tangential direction of the core hole (5).
  7. Device (4) according to one of Claims 1 to 6, characterized in that the insulating regions (6) have in each case a cavity (13).
  8. Device (4) according to one of Claims 1 to 7, characterized by at least one holding part (8) with at least one latching element (14) for latching the device (4) to a holder for receiving the toroidal core choke (1).
  9. Device (4) according to one of Claims 1 to 8, characterized in that the end faces, confronting the toroidal core (2), of the insulating regions (6) have nose-shaped projections (15) for latching the toroidal core (2) into the device (4).
  10. Toroidal core choke (1), having a toroidal core (2), a device (4) for electrical isolation according to one of Claims 1 to 9 and at least two windings (3) insulated from one another electrically by the device (4) for electrical isolation, the central region (7) of the device for electrical isolation (4) being tensioned by the compression zone (9) being compressed, said central region exerting an elastic force upon the two insulating regions (6) in the direction of the toroidal core (2).
EP10778665.9A 2009-11-19 2010-11-18 Device for electrical isolation and toroidal core choke Active EP2502243B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009054001A DE102009054001A1 (en) 2009-11-19 2009-11-19 Device for potential separation and toroidal core choke
PCT/EP2010/067759 WO2011061258A2 (en) 2009-11-19 2010-11-18 Device for electrical isolation and toroidal core choke

Publications (2)

Publication Number Publication Date
EP2502243A2 EP2502243A2 (en) 2012-09-26
EP2502243B1 true EP2502243B1 (en) 2015-02-11

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US (1) US8841985B2 (en)
EP (1) EP2502243B1 (en)
JP (1) JP5701309B2 (en)
CN (1) CN102598166B (en)
DE (1) DE102009054001A1 (en)
HU (1) HUE025420T2 (en)
WO (1) WO2011061258A2 (en)

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DE202013000695U1 (en) 2013-01-24 2013-01-31 Würth Elektronik eiSos Gmbh & Co. KG Separating element for a toroidal core choke and toroidal core
CN105336476B (en) * 2014-06-03 2018-01-30 中达电子(江苏)有限公司 Switching Power Supply, electromagnetic interface filter, common-mode inductor and its method for winding
DE102016206171A1 (en) 2016-04-13 2017-10-19 Würth Elektronik eiSos Gmbh & Co. KG Separating element for a toroidal core choke and toroidal core choke
DE102016107818B4 (en) * 2016-04-27 2018-01-25 Sma Solar Technology Ag Throttling arrangement with an insert
DE102017214857A1 (en) * 2017-08-24 2019-02-28 Vacuumschmelze Gmbh & Co. Kg Toroidal assembly, current-compensated inductor, and method of making a toroidal assembly

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Publication number Priority date Publication date Assignee Title
JPS60179013U (en) 1984-05-08 1985-11-28 株式会社村田製作所 Insulation case for toroidal magnetic core
DE3782987D1 (en) * 1986-08-01 1993-01-21 Siemens Ag POTENTIAL SEPARATION FOR A RING CORDLE.
DE19932475C2 (en) 1999-07-12 2002-04-25 Vacuumschmelze Gmbh Inductive component
JP2003297650A (en) 2002-04-04 2003-10-17 Hokuriku Denki Seizo Kk Common mode choke coil
DE10308010A1 (en) 2003-02-25 2004-09-09 Epcos Ag Insulating part, toroidal core, toroidal core choke and method for producing the toroidal core choke
DE102004037853A1 (en) * 2004-08-04 2006-03-16 Epcos Ag Holder for a choke coil and an inductive component with the holder
DE102004048966A1 (en) 2004-10-07 2006-04-13 Epcos Ag Device for electrical isolation, toroidal core choke and method for producing the toroidal core choke
DE102005006344A1 (en) 2005-02-11 2006-08-17 Epcos Ag Insulating part and toroidal core choke
DE102005027943A1 (en) * 2005-06-16 2006-12-28 Epcos Ag Carrier device for a toroidal core choke, holder for an inductive component and inductive component
DE102005027942A1 (en) 2005-06-16 2006-12-28 Epcos Ag Holding device, carrier device for a toroidal core choke and inductive component

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DE102009054001A1 (en) 2011-08-04
WO2011061258A3 (en) 2011-07-14
US8841985B2 (en) 2014-09-23
EP2502243A2 (en) 2012-09-26
US20120274439A1 (en) 2012-11-01
JP5701309B2 (en) 2015-04-15
WO2011061258A2 (en) 2011-05-26
JP2013511832A (en) 2013-04-04
CN102598166B (en) 2015-04-22
CN102598166A (en) 2012-07-18
HUE025420T2 (en) 2016-04-28

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