EP2502243A2 - Device for electrical isolation and toroidal core choke - Google Patents

Device for electrical isolation and toroidal core choke

Info

Publication number
EP2502243A2
EP2502243A2 EP10778665A EP10778665A EP2502243A2 EP 2502243 A2 EP2502243 A2 EP 2502243A2 EP 10778665 A EP10778665 A EP 10778665A EP 10778665 A EP10778665 A EP 10778665A EP 2502243 A2 EP2502243 A2 EP 2502243A2
Authority
EP
European Patent Office
Prior art keywords
portions
toroidal core
webs
core
insulating regions
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.)
Granted
Application number
EP10778665A
Other languages
German (de)
French (fr)
Other versions
EP2502243B1 (en
Inventor
Günter FEIST
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.)
TDK Electronics AG
Original Assignee
Epcos AG
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 Epcos AG filed Critical Epcos AG
Publication of EP2502243A2 publication Critical patent/EP2502243A2/en
Application granted granted Critical
Publication of EP2502243B1 publication Critical patent/EP2502243B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H01F27/32—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 electrical isolation for installation in a core hole of a toroidal core.
  • the application relates to a toroidal core choke having a ring ⁇ core, a device for electrical isolation and at least two electrically isolated from each other by the device windings.
  • 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 known device comprises at least three webs are required for correct positio ⁇ discrimination 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.
  • 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 first sections of two parallel to one another
  • 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 include a second portion, wherein the at least two first portions and two second portions of the two webs in the relaxed state of the traffic jam monitoring ⁇ zone forming the sides of a parallelogram.
  • One of the ⁇ like, preferably centrally arranged rhomboid allows a kink-free compression of the compression zone.
  • the at least two first portions of a lower material ⁇ thickness than the second portions so that when a motion of the isolation regions in the radial direction at least two first portions are deformed S-shape and the two ⁇ ten sections in the Be moved substantially parallel to each other.
  • the device is integrally formed.
  • it can be particularly simple and inexpensively manufactured as an injection molded ⁇ who.
  • the device has two with respect to the central region gegenü ⁇ overlying 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 isolation regions extend beyond an associated part of the centering ⁇ ral Schemees in the tangential direction of the core hole. In this way, a desired insulation distance between adjacent windings of the toroidal core can be set independently of the material thickness of the device for electrical isolation in the central region.
  • 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 Ring core choke.
  • Figure 1 is a front view of a toroidal core throttle according ei ⁇ nem first embodiment of the invention
  • FIG. 2 shows a perspective view of the ring core roses according to FIG. 1,
  • Figure 5 is a side view of a device for potential separation ⁇ according to a second embodiment.
  • 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, Dros ⁇ selspulen 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 comprising a Vorrich ⁇ tung 4 for potential separation.
  • the device 4 is fitted in the core hole 5 of the toroidal core 2.
  • Figure 2 shows a perspective view of the Ringkerndros ⁇ sel 1 according to Figure 1. In the embodiment, it is a toroidal core choke 1 for vertical mounting on a ge ⁇ 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.
  • Figures 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 wells comprises in the illustrated embodiment each ⁇ a support member 8a and 8b, the surface at the Isolierbaus- connect 6a and 6b, respectively, and arranged between the supporting portions 8a and 8b central compression zone 9.
  • the compression zone 9 can be in the radial direction of the Ring core choke 1 compress, so in the figure 3A in the vertical direction.
  • the embodiment shown in Figures 3A and 3B storage ⁇ monitoring zone 9 has two webs 10a and 10b.
  • Each of the webs 10a and 10b has a first section IIa or Ib and a second section 12a or 12b.
  • 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 it is in the material used for a heat-resistant and flame-resistant ⁇ 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 IIa, IIb, 12a and 12b enclose a cavity in the projection shown and form a parallelogram in the relaxed state shown in FIG. 3A.
  • the first portions IIa and IIb have a smaller material thickness than the second Materialab ⁇ sections 12a and 12b. As a result, the first portions IIa and IIb are easier to elastically deform with respect to the second portions 12a and 12b.
  • S-shaped deformable first portions 11 between the second portions 12 are arranged.
  • the compression shown in FIG. 3B 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 portions 6 protrude in a tangential direction beyond the holding portions 8 of the central portion 7, thus establishing a desired insulating distance between the adjacent coils 3a and 3b.
  • the insulating regions 6a and 6b in the illustrated embodiment each having a cavity 13a and 13b.
  • Figure 4 shows a side view of the device 4 in the plane spanned by the axial and radial directions.
  • FIG. 5 shows a side view of a device 4 according to a second exemplary embodiment.
  • the side view ge ⁇ according to Figure 5 shows the plane spanned by the axial and radial direction of a ring core 2 level.
  • the insulating regions 6a and 6b according to the second embodiment at their end faces ⁇ each have two nose-shaped projections 15 which interlock the device 4 in the inserted state with the ring core 2, not shown in FIG.
  • the compression zone 9 exerts an elastic force on the Stirnflä ⁇ surfaces 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 bonding the device 4 with the toroidal core 2, dispensable.

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

Abstract

The invention relates to a device (4) for electrical isolation for installation in a core hole (5) of a toroidal core (2). The device (4) comprises a central region (7) and two isolating regions (6), which protrude from the central region (7) in the radial direction of the core hole (5) and can be moved in the radial direction. The central region (7) comprises a compression zone (9) having at least two first sections (11) of two webs (10) that are parallel to each other, said webs mechanically coupling the two isolating regions (6) to each other. Each of the at least two first sections (11) can be elastically deformed in an S-shape, wherein the at least two first sections (11) of the two webs (10) are disposed parallel to each other in the relaxed state of the compression zone (9). The invention further relates to a toroidal core choke comprising such a device (4) for electrical isolation.

Description

Beschreibung description
Vorrichtung zur Potentialtrennung und Ringkerndrossel Die Erfindung betrifft eine Vorrichtung zur Potentialtrennung zum Einbau in ein Kernloch eines Ringkerns. Darüber hinaus betrifft die Anmeldung eine Ringkerndrossel, die einen Ring¬ kern, eine Vorrichtung zur Potentialtrennung sowie wenigstens zwei durch die Vorrichtung elektrisch voneinander isolierte Wicklungen aufweist. The invention relates to a device for electrical isolation for installation in a core hole of a toroidal core. In addition, the application relates to a toroidal core choke having a ring ¬ core, a device for electrical isolation and at least two electrically isolated from each other by the device windings.
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 e- lektrisch 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 Bl sind eine Vorrichtung zur Potentialtrennung, eine Ringkerndrossel und ein Verfahren zur Herstel¬ lung einer Ringkerndrossel bekannt. Die dort beschriebene Vorrichtung zur Potentialtrennung umfasst ein Mittelteil so- wie 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 EP 1797572 Bl a device for potential separation, a toroidal core choke and a method for the manufacture ¬ ment of a toroidal core choke are known. The device for potential separation described therein comprises a middle part as well as 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 Positio¬ nierung 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 comprises at least three webs are required for correct positio ¬ discrimination 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 her- zustellende und zu montierende Vorrichtung zur Potentialtren¬ nung zum Einbau in ein Kernloch eines Ringkerns zu beschrei¬ ben, 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 . Object of the present invention is to compensate for an easy manufacturing presentation end and to be mounted device for Potentialtren ¬ voltage for installation in a core hole of a toroidal core to beschrei ¬ ben, wherein the device is to be suitable for tolerances in the diameter of the core hole of the ring 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 axially and the direction orthogonal in each point to these two directions as tangential.
Die oben genannte Aufgabe wird durch eine Vorrichtung zur Po¬ tentialtrennung zum Einbau in ein Kernloch eines Ringkerns gemäß Patentanspruch 1 gelöst. The above object is achieved by a device for Po ¬ tentialtrennung 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 mindes- tens zwei zueinander parallelen ersten Abschnitten von zweiThe 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 first sections of two parallel to one another
Stegen auf, die die zwei Isolierbereiche mechanisch miteinan¬ der 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. Webs on which the two insulating areas mechanically miteinan ¬ couple. 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 Isolierbe¬ reiche in eine Verformung der zwei ersten Abschnitte im Be¬ reich 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 Innendruchmesser des Ringkerns auszugleichen . By using parallel, elastically deformable first S-shaped portions, a radial movement of the Isolierbe ¬ rich can be transformed into a deformation of the first two sections in the area of the Be ¬ 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 Stau¬ chungszone die Seiten eines Parallelogramms bilden. Ein der¬ artiger, bevorzugt zentral angeordneter Rhomboid ermöglicht eine knickfreie Kompression der Stauchungszone. According to an advantageous embodiment, each of the two webs further each include a second portion, wherein the at least two first portions and two second portions of the two webs in the relaxed state of the traffic jam monitoring ¬ zone forming the sides of a parallelogram. One of the ¬ like, preferably centrally arranged rhomboid allows a kink-free compression of the compression zone.
Gemäß einer weiteren vorteilhaften Ausgestaltung weisen die mindestens zwei ersten Abschnitte eine geringere Material¬ stärke auf als die zweiten Abschnitte, sodass bei einer Bewe- gung der Isolierbereiche in radialer Richtung mindestens zwei die ersten Abschnitte S-förmig verformt werden und die zwei¬ ten 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 of a lower material ¬ thickness than the second portions so that when a motion of the isolation regions in the radial direction at least two first portions are deformed S-shape and the two ¬ ten sections in the Be moved 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 wer¬ den . According to an advantageous embodiment, the device is integrally formed. Thus, it can be particularly simple and inexpensively manufactured as an injection molded ¬ who.
Gemäß einer weiteren vorteilhaften Ausgestaltung weist die Vorrichtung zwei sich bezüglich des Zentralbereichs gegenü¬ berliegende 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 gegenü ¬ overlying 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 Zent¬ ralbereiches 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 Zentralbe- reich eingestellt werden. According to a further advantageous embodiment, the isolation regions extend beyond an associated part of the centering ¬ ralbereiches in the tangential direction of the core hole. In this way, a desired insulation distance between adjacent windings of the toroidal core can be set independently of the material thickness of the device for electrical isolation 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 Iso- lierbereichen mit einem verhältnismäßig großen Isolierab¬ stand . According to a further embodiment, the insulating regions each have a cavity. The use of a cavity allows a material saving in the formation of insulating regions with a relatively large Isolierab ¬ stand.
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 Ring core 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 Vor¬ sprünge einer Stirnfläche gestattet eine sichere, klebstoff¬ freie Befestigung der Vorrichtung in dem Ringkern. Die oben genannte Aufgabe wird ebenso durch eine Ringkern¬ drossel aufweisend einen Ringkern, eine Vorrichtung zur Potentialtrennung gemäß einer der oben genannten Ausgestaltungen sowie wenigstens zwei durch die Vorrichtung zur Potenti¬ altrennung elektrisch voneinander isolierte Wicklungen ge- löst. 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. 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. An engagement of the toroidal core between the nose-shaped front of an end face cracks ¬ allows a secure, adhesive ¬ free fastening of the device in the ring core. The above object is solved by having the apparatus for Potenti ¬ altrennung electrically isolated windings as by a toroidal core choke ¬ a toroidal core, a device for potential separation according to one of the above embodiments and at least two. 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 so- wie 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 Ausführungsbei¬ spielen und dazugehörigen Figuren näher erläutert. Die Figuren zeigen schematische und nicht maßstabsgetreue Darstellun- gen unterschiedlicher Ausführungsbeispiele. Es zeigen: In the following the invention with reference to Ausführungsbei ¬ games and associated figures will be explained in more detail. The figures show schematic and not to scale representations of different embodiments. Show it:
Figur 1 eine Vorderansicht einer Ringkerndrossel gemäß ei¬ nem ersten Ausführungsbeispiel der Erfindung, Figure 1 is a front view of a toroidal core throttle according ei ¬ nem first embodiment of the invention,
Figur 2 eine perspektivische Darstellung der Ringkerndros¬ sel gemäß Figur 1, FIG. 2 shows a perspective view of the ring core roses according to FIG. 1,
Figuren 3A und 3B Vorderansichten einer Vorrichtung zur Potentialtrennung gemäß dem ersten Ausführungsbeispiel im entspannten beziehungsweise komprimierten Zustand, FIGS. 3A and 3B front views of a device for potential separation according to the first exemplary embodiment in the relaxed or compressed state,
Figur 4 eine Seitenansicht der Vorrichtung zur Potential¬ trennung gemäß Figur 3B und Figure 4 is a side view of the device for potential separation according ¬ figure 3B and
Figur 5 eine Seitenansicht einer Vorrichtung zur Potential¬ trennung gemäß einem zweiten Ausführungsbeispiel. Figure 5 is 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 choke.
Die Ringkerndrossel 1 umfasst einen Ringkern 2 sowie zwei e- lektrisch voneinander isolierte Wicklungen 3a und 3b. Bei den Wicklungen 3a und 3b handelt es sich beispielsweise um Dros¬ selspulen 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, Dros ¬ selspulen 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 Vorrich¬ tung 4 zur Potentialtrennung. Die Vorrichtung 4 ist in das Kernloch 5 des Ringkerns 2 eingepasst. Figur 2 zeigt eine perspektivische Ansicht der Ringkerndros¬ sel 1 gemäß Figur 1. Im Ausführungsbeispiel handelt es sich um eine Ringkerndrossel 1 zur stehenden Montage auf einer ge¬ druckten 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. In order to electrically insulate the windings 3a and 3b from each other, the toroidal core choke 1 further comprising a Vorrich ¬ tung 4 for potential separation. The device 4 is fitted in the core hole 5 of the toroidal core 2. Figure 2 shows a perspective view of the Ringkerndros ¬ sel 1 according to Figure 1. In the embodiment, it is a toroidal core choke 1 for vertical mounting on a ge ¬ 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 . Figures 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 je¬ weils ein Halteteil 8a und 8b, die sich an die Isolierberei- che 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. The central region 7 weils comprises in the illustrated embodiment each ¬ a support member 8a and 8b, the surface at the Isolierberei- connect 6a and 6b, respectively, and arranged between the supporting portions 8a and 8b central compression zone 9. The compression zone 9 can be in the radial direction of the Ring core choke 1 compress, so in the figure 3A in the vertical direction.
Hierzu weist die in den Figuren 3A und 3B dargestellte Stau¬ chungszone 9 zwei Stege 10a und 10b auf. Jeder der Stege 10a und 10b weist einen ersten Abschnitt I I a beziehungsweise I Ib und einen zweiten Abschnitt 12a beziehungsweise 12b auf. For this purpose, the embodiment shown in Figures 3A and 3B storage ¬ monitoring zone 9 has two webs 10a and 10b. Each of the webs 10a and 10b has a first section IIa or Ib and a second section 12a or 12b.
Die Stege 10a und 10b bestehen aus einem elastischen Material und können daher unter Krafteinwirkung verformt werden. 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 hitze¬ beständigen und schwerentflammbaren Kunststoff. In the exemplary embodiment, the entire device 4 is produced as a one-piece plastic injection-molded part. Prefers If it is in the material used for a heat-resistant and flame-resistant ¬ 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 IIa, IIb, 12a und 12b schließen in der dargestellten Projektion einen Hohlraum ein und bilden im in der Figur 3A dargestellten entspannten Zustand ein Pa- rallelogramm. Dabei weisen die ersten Abschnitte IIa und IIb eine geringere Materialstärke auf als die zweiten Materialab¬ schnitte 12a und 12b. In Folge dessen lassen sich die ersten Abschnitte IIa und IIb 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 IIa, IIb, 12a and 12b enclose a cavity in the projection shown and form a parallelogram in the relaxed state shown in FIG. 3A. The first portions IIa and IIb have a smaller material thickness than the second Materialab ¬ sections 12a and 12b. As a result, the first portions IIa and IIb 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 ver¬ formen sich die ersten Abschnitte IIa und IIb 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 Figure 3B. Here ver ¬ to form the first portions IIa and IIb of the webs 10a and 10b 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 Rich¬ tung 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 compression shown in FIG. 3B 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 spa¬ rende 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 shown in Figs. 3A and 3B, the insulating portions 6 protrude in a tangential direction beyond the holding portions 8 of the central portion 7, thus establishing a desired insulating distance between the adjacent coils 3a and 3b. In order to still allow a simple and material spa ¬ rende production of the device 4 by an injection molding process, the insulating regions 6a and 6b in the illustrated embodiment, each having a cavity 13a and 13b.
Figur 4 zeigt eine Seitenansicht der Vorrichtung 4 auf die durch die axiale und radiale Richtung aufgespannte Ebene. Figure 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 Aus¬ führungsbeispiel beidseitig mit Rastelementen 14 ausgestaltet sind. Die Rastelemente 14 ermöglichen dabei eine sichere Ver- rastung der Vorrichtung 4 mit einer in den Figuren nicht dar- gestellten, im Wesentlichen U-förmigen Halterung zur Aufnahme der Ringkerndrossel 1 auf einer Leiterplatte. Die Rastelemen¬ te 14 des Bereichs A sind im unteren Teil der Figur 4 vergrö¬ ßert dargestellt. Figur 5 zeigt eine Seitenansicht einer Vorrichtung 4 gemäß einem zweiten Ausführungsbeispiel. Auch die Seitenansicht ge¬ mäß Figur 5 zeigt die durch die axiale und radiale Richtung eines Ringkerns 2 aufgespannte Ebene. In der Figur 5 ist zu erkennen, dass die Isolierbereiche 6a und 6b gemäß dem zweiten Ausführungsbeispiel an ihren Stirn¬ flächen 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 Stirnflä¬ chen 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 figure 4 it can be seen that the holding parts 8 in the exemplary embodiment ¬ are designed on both sides with locking elements 14. In this case, the latching elements 14 allow a secure latching of the device 4 with a substantially U-shaped holder, which is not shown in the figures, for receiving the toroidal core choke 1 on a printed circuit board. The Rastelemen ¬ te 14 of the region A are shown magnification ¬ ßert in the lower part of FIG. 4 FIG. 5 shows a side view of a device 4 according to a second exemplary embodiment. The side view ge ¬ according to Figure 5 shows the plane spanned by the axial and radial direction of a ring core 2 level. In the figure 5 it can be seen that the insulating regions 6a and 6b according to the second embodiment at their end faces ¬ each have two nose-shaped projections 15 which interlock the device 4 in the inserted state with the ring core 2, not shown in FIG. The compression zone 9 exerts an elastic force on the Stirnflä ¬ surfaces 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 bonding 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 be¬ schränkt. Insbesondere können die Gestalt und Anzahl der Iso¬ lierbereiche an die Anforderungen von Ringkerndrosseln mit unterschiedlichen Wicklungen angepasst werden. The invention is not limited to the exemplary embodiments illustrated in the figures and described above in detail. In particular, the shape and number of Iso ¬ lierbereiche can be adapted to the requirements of toroidal core chokes with different windings.
Bezugs zeichenliste Reference sign list
1 Ringkerndrossel 1 ring core choke
2 Ringkern  2 ring core
3 Wicklung  3 winding
4 Vorrichtung zur Potentialtrennung 4 device for potential separation
5 Kernloch 5 core hole
6 Isolierbereich  6 insulation area
7 Zentralbereich  7 central area
8 Halteteil  8 holding part
9 Stauchungszone  9 compression zone
10 Steg  10 footbridge
11 erster Abschnitt  11 first section
12 zweiter Abschnitt  12 second section
13 Hohlraum  13 cavity
14 Rastelement  14 locking element
15 Vorsprung  15 advantage

Claims

Vorrichtung (4) zur Potentialtrennung zum Einbau in einDevice (4) for electrical isolation for installation in a
Kernloch (5) eines Ringkerns (2), aufweisend Core hole (5) of a toroidal core (2), comprising
einen Zentralbereich (7) und zwei aus dem Zentralbereicha central area (7) and two from the central area
(7) in radialer Richtung des Kernlochs (5) herausragende und in der radialen Richtung bewegliche Isolierbereiche(7) insulating portions extending in the radial direction of the core hole (5) and movable in the radial direction
( 6) , wobei (6), where
- der Zentralbereich (7) eine Stauchungszone (9) mit mindestens zwei zueinander parallelen ersten Abschnitten (11) von zwei Stegen (10) aufweist,  - The central region (7) has a compression zone (9) with at least two mutually parallel first sections (11) of two webs (10),
- die zwei Stege (10) die zwei Isolierbereiche (6) me¬ chanisch miteinander koppeln, - The two webs (10) the two insulating regions (6) me ¬ chanically couple together
- jeder der mindestens zwei ersten Abschnitte (11) elas¬ tisch S-förmig verformbar ist und - each of the at least two first portions (11) elas ¬ illustrates S-shaped deformable and
- die mindestens zwei ersten Abschnitte (11) der zwei Stege (10) im entspannten Zustand der Stauchungszone (9) zueinander parallel angeordnet sind.  - The at least two first portions (11) of the two webs (10) in the relaxed state of the compression zone (9) are arranged parallel to each other.
Vorrichtung (4) nach Anspruch 1, Device (4) according to claim 1,
dadurch gekennzeichnet, dass characterized in that
jeder der zwei Stege (10) des Weiteren jeweils einen zweiten Abschnitt (12) aufweist, wobei die mindestens zwei ersten Abschnitte (11) und die zwei zweiten Ab¬ schnitt (12) der zwei Stege (10) im entspannten Zustand der Stauchungszone (9) die Seiten eines Parallelogramms bilden . each of the two webs (10) further each having a second portion (12), wherein the at least two first portions (11) and the two second Ab ¬ section (12) of the two webs (10) in the relaxed state of the compression zone (9 ) form the sides of a parallelogram.
Vorrichtung (4) nach Anspruch 2, Device (4) according to claim 2,
dadurch gekennzeichnet, dass characterized in that
die zwei mindestens zwei ersten Abschnitte (11) eine ge¬ ringere Materialstärke aufweisen als die zwei zweiten Abschnitte (12), sodass bei einer Bewegung der Isolierbereiche (6) in radialer Richtung die mindestens zwei ersten Abschnitte (11) S-förmig verformt werden und die zweiten Abschnitte (12) im Wesentlichen parallel zueinander verschoben werden. the first two at least two portions (11) have a ge ¬ ringere material thickness than the two second portions (12) so that upon movement of the insulating regions (6) in the radial direction of the at least two first portions (11) are S-shaped deformed and the second portions (12) are displaced substantially parallel to each other.
Vorrichtung (4) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass Device (4) according to one of claims 1 to 3, characterized in that
die Vorrichtung (4) einstückig ausgebildet ist. the device (4) is integrally formed.
Vorrichtung (4) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass Device (4) according to one of claims 1 to 4, characterized in that
die Vorrichtung (4) zwei sich bezüglich des Zentralbereichs (7) gegenüberliegende Isolierbereiche (6) auf¬ weist, so dass die Vorrichtung (4) die Gestalt eines in der Länge komprimierbaren Steges aufweist. the device (4) has two insulating regions (6) lying opposite one another with respect to the central region (7), so that the device (4) has the shape of a web which is compressible in its length.
Vorrichtung (4) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass Device (4) according to one of claims 1 to 5, characterized in that
die Isolierbereiche (6) über einen damit verbundenen Teil des Zentralbereichs (7) in tangentialer Richtung des Kernlochs (5) hinausragen. the insulating regions (6) project beyond an associated part of the central region (7) in the tangential direction of the core hole (5).
Vorrichtung (4) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass Device (4) according to one of claims 1 to 6, characterized in that
die Isolierbereiche (6) jeweils einen Hohlraum (13) auf weisen . the insulating regions (6) each have a cavity (13).
Vorrichtung (4) nach einem der Ansprüche 1 bis 7, gekennzeichnet durch Device (4) according to one of claims 1 to 7, characterized by
wenigstens ein Halteteil (8) mit wenigstens einem Rast¬ element (14) zur Verrastung der Vorrichtung (4) mit einer Halterung zur Aufnahme der Ringkerndrossel (1) . at least one retaining part (8) with at least one latching element ¬ (14) for locking the device (4) having a holder for holding the toroidal core choke (1).
Vorrichtung (4) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die dem Ringkern (2) zugewandten Stirnflächen der Isolierbereiche (6) nasenförmige Vorsprünge (15) zum Ein¬ rasten des Ringkerns (2) in die Vorrichtung (4) aufweisen . Device (4) according to one of claims 1 to 8, characterized in that having the toroidal core (2) facing end surfaces of the insulating regions (6) nose-shaped projections (15) for a ¬ rest of the toroidal core (2) in the device (4).
Ringkerndrossel (1) aufweisend einen Ringkern (2), eine Vorrichtung (4) zur Potentialtrennung nach einem der Ansprüche 1 bis 9 sowie wenigstens zwei durch die Vorrich¬ tung (4) zur Potentialtrennung elektrisch voneinander isolierte Wicklungen (3), wobei der Zentralbereich (7) der Vorrichtung zur Potentialtrennung (4) durch eine Komprimierung der Stauchungszone (9) gespannt ist und eine elastische Kraft auf die zwei Isolierbereiche (6) in Richtung des Ringkerns (2) ausübt. Ring core choke (1) comprising a toroidal core (2), a device (4) for potential separation according to one of claims 1 to 9 and at least two electrically isolated from each other by the Vorrich ¬ device (4) for electrical isolation windings (3), wherein the central region ( 7) of the device for electrical isolation (4) by compression of the compression zone (9) is stretched and an elastic force on the two insulating regions (6) in the direction of the toroidal core (2) exerts.
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 true EP2502243A2 (en) 2012-09-26
EP2502243B1 EP2502243B1 (en) 2015-02-11

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EP (1) EP2502243B1 (en)
JP (1) JP5701309B2 (en)
CN (1) CN102598166B (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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EP0258592B1 (en) * 1986-08-01 1992-12-09 Siemens Aktiengesellschaft Potential separation for a choke with an annular core
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
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DE102004037853A1 (en) * 2004-08-04 2006-03-16 Epcos Ag Holder for a choke coil and an inductive component with the holder
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US20120274439A1 (en) 2012-11-01
WO2011061258A2 (en) 2011-05-26
EP2502243B1 (en) 2015-02-11
JP2013511832A (en) 2013-04-04
JP5701309B2 (en) 2015-04-15
WO2011061258A3 (en) 2011-07-14
DE102009054001A1 (en) 2011-08-04
US8841985B2 (en) 2014-09-23
HUE025420T2 (en) 2016-04-28
CN102598166A (en) 2012-07-18

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