EP0226793A1 - Wound ferrite ring core impermeably encapsulated by a liquid resin or by a synthetic thermoplastic resin - Google Patents

Wound ferrite ring core impermeably encapsulated by a liquid resin or by a synthetic thermoplastic resin Download PDF

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Publication number
EP0226793A1
EP0226793A1 EP86115631A EP86115631A EP0226793A1 EP 0226793 A1 EP0226793 A1 EP 0226793A1 EP 86115631 A EP86115631 A EP 86115631A EP 86115631 A EP86115631 A EP 86115631A EP 0226793 A1 EP0226793 A1 EP 0226793A1
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EP
European Patent Office
Prior art keywords
trough
ring core
ferrite ring
wall
wrapped
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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.)
Ceased
Application number
EP86115631A
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German (de)
French (fr)
Inventor
Josef Dipl.-Ing. Dirmeyer (Fh)
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Siemens AG
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Siemens AG
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Publication of EP0226793A1 publication Critical patent/EP0226793A1/en
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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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation

Definitions

  • the invention relates to a moisture-proof, coated with cast resin or thermoplastic synthetic resin, wound ferrite ring core, which is inserted unwrapped in an annular trough made of thermoplastic material closed by a cap and the winding of which is applied to the trough.
  • the above-mentioned trough has already been developed to protect the ferrite ring core.
  • it has already been proposed to first coat the unwound ferrite ring cores with wax or similar materials, that is to say, to create a buffer between the bare ferrite ring core and the covering or the shrinkage pressure exerted by this covering during curing.
  • the present invention has for its object to provide a further improved protection for the unwound or bare ferrite ring core against the shrinkage pressure occurring during curing of the cladding material for a covered and wound ferrite ring core of the type mentioned, which is essentially based on an improved design of the trough .
  • the invention provides in a wound ferrite ring core according to the preamble of claim 1, that the trough on the inside of at least one of the concentric trough walls integrally formed on the trough wall resilient tabs, which rest at least with their free end edges against the ferrite ring core, in such a way that the ferrite ring core is centered in the trough and that the cap is designed as a cover which hermetically seals onto the end face of the trough walls, for example is welded on.
  • the ferrite ring core is preferably arranged with play in the trough and through the tabs which are preferably evenly distributed over the trough circumference centered and fixed in its position.
  • the resilient tabs ensure a virtually free centering and fixing of the ferrite ring core in the trough and thus create the conditions for the formation of air cushions between the ferrite ring core and the trough walls.
  • These air cushions act as additional protection for the bare ferrite ring core when the cladding material hardens.
  • the trough 1 made of thermoplastic material has trough walls 2, 5 on.
  • the end faces of the trough walls 2, 5 initially have a roof-like cross section, as shown in section in FIG. 2.
  • This cross-section achieves a maximum of energy transfer in the welding area during ultrasonic welding, by means of which the cover 6 is welded with its corresponding end faces onto the end faces of the trough 1.
  • the trough 1 has on the inside of its trough wall 2 resilient tabs 4 which are integrally formed on the trough wall 2 in recesses 8 which are recessed from an additional wall 3.
  • the tabs 4 lie with their free end edges against the ferrite ring core 7 in such a way that the latter is fixed and centered in the trough 1.
  • the ferrite ring core 7 is arranged with play in the trough 1, so that a more or less large air cushion 9 is formed between the ferrite ring core 7 and the trough wall 5 depending on the "core thickness".
  • the trough 1 which is hermetically sealed by the welded-on cover 6, is - which is not shown in the drawing - wound with windings 12 and coated with casting resin or thermoplastic synthetic resin 15.
  • the "air cushions” 9 absorb the high shrinkage pressures which occur when these resins cure and which can lead to destruction or at least impairment of the technical data of the ferrite ring cores 7.
  • the play of the ferrite ring core 7 in the trough 1, ie the air cushion 9, and if necessary, the spring strength of the tabs 4 is selected accordingly.
  • the troughs can - as shown in FIGS. 4 and 5 - have integrally molded webs 18 on the inner wall of the trough for separating the winding potentials and eyes 10 integrally molded on the outside of the trough as carriers of connecting pins 11.
  • Spacers 14, which are also integrally formed on the troughs, ensure that the necessary distances of the finished chokes placed on printed circuit boards are maintained.

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

Abstract

Feuchtigkeitsdicht mit Gießhaz oder thermoplatischem Kunstharz (15) umhüllter, bewickelter Ferritringkern (7) der umbewickelt in einen durch eine Kappe (6) aus thermoplastischem Werkstoff geschlossenen, ringförmigen Trog (1) aus thermoplastischem Werkstoff eingesetzt ist und dessen Wicklung (12, 13) auf den Trog (1) aufgebracht ist. Der Trog (1) weist auf der Innenseite mindestens eines seiner zueinander konzentrischen Trogwände (2, 5) einstückig an die Trogwand angeformte federnde Lappen (4) auf, die zumindest mit ihren freien Stirnkanten gegen den Ferritringkern (7) anliegen, derart daß der Ferritringkern (7) im Trog (1) fixiert und zentriert ist und bei ausreichendem Spiel des Ferritringkerns (7) im Trog (1) ein Luftpolster (9) zwischen dem Ferritringkern (7) und der Trogwand (5) gebildet wird.Moisture-tight, coated with cast resin or thermoplastic resin (15), wound ferrite ring core (7) which is wrapped in a ring-shaped trough (1) made of thermoplastic material and closed by a cap (6) made of thermoplastic material and the winding (12, 13) of which the trough (1) is applied. The trough (1) has on the inside of at least one of its concentric trough walls (2, 5) integrally formed on the trough wall resilient tabs (4), which at least rest with their free end edges against the ferrite ring core (7), so that the ferrite ring core (7) is fixed and centered in the trough (1) and with sufficient play of the ferrite ring core (7) in the trough (1) an air cushion (9) is formed between the ferrite ring core (7) and the trough wall (5).

Description

Die Erfindung betrifft einen feuchtigkeitsdicht mit Gieß­harz oder thermoplastischem Kunstharz umhüllten, be­wickelten Ferritringkern, der unbewickelt in einen durch eine Kappe aus thermoplastischem Werkstoff geschlossenen, ringförmigen Trog aus thermoplastischem Werkstoff einge­setzt ist und dessen Wicklung auf den Trog aufgebracht ist.The invention relates to a moisture-proof, coated with cast resin or thermoplastic synthetic resin, wound ferrite ring core, which is inserted unwrapped in an annular trough made of thermoplastic material closed by a cap and the winding of which is applied to the trough.

Beim Aushärten der aus Gießharz oder thermoplastischem Kunstharz bestehenden Umhüllung der bewickelten Ferrit­ringkerne wirkt auf die Ferritringkerne - vorausgesetzt, die Ferritringkerne sind nicht entsprechend geschützt - ein durch die Schrumpfung des Harzes verursachter Druck ein, der zur Zerstörung oder zumindest zu einer erheblichen Be­einträchtigung der elektrischen und magnetischen Daten des Ferritringkerns führen kann.When the wrapping of the wound ferrite ring cores, which is made of casting resin or thermoplastic synthetic resin, hardens, a pressure caused by the shrinkage of the resin acts on the ferrite ring cores - provided the ferrite ring cores are not adequately protected - which leads to the destruction or at least to a considerable impairment of the electrical and magnetic Data of the ferrite ring core can lead.

Als Schutz für den Ferritringkern wurde bereits der vor­stehend genannte Trog entwickelt. Darüberhinaus wurde zum Schutz der Ferritringkerne bereits vorgeschlagen, die unbe­wickelten Ferritringkerne zunächst mit Wachs oder ähnlichen Werkstoffen zu beschichten, d.h. sozusagen, eine Pufferung zwischen dem blanken Ferritringkern und der Umhüllung bzw. dem durch diese Umhüllung beim Aushärten ausgeübten Schrumpf­druck zu schaffen.The above-mentioned trough has already been developed to protect the ferrite ring core. In addition, in order to protect the ferrite ring cores, it has already been proposed to first coat the unwound ferrite ring cores with wax or similar materials, that is to say, to create a buffer between the bare ferrite ring core and the covering or the shrinkage pressure exerted by this covering during curing.

Auch wurde für die Umhüllung bereits ein sogenannter "Weichverguß" geschaffen, der jedoch nicht ausreichend dicht ist und folglich bei Feuchtelagerung der bewickelten Ferrit­ringkerne, d.h. üblich der Ringkerndrosseln, zu einem Ab­fall der Isolationswerte führt.A so-called "soft potting" has also already been created for the sheathing, but it is not sufficiently tight and consequently when the wound ferrite cores are stored in moisture, i.e. Usually the toroidal chokes lead to a drop in the insulation values.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, für einen umhüllten und bewickelten Ferritringkern der ein­gangs genannten Art einen weiter verbesserten Schutz für den unbewickelten bzw. blanken Ferritringkern gegen den beim Aushärten des Umhüllungswerkstoffes auftretenden Schrumpfdruck zu schaffen, der im wesentlichen auf einer verbesserten Gestaltung des Troges beruht.The present invention has for its object to provide a further improved protection for the unwound or bare ferrite ring core against the shrinkage pressure occurring during curing of the cladding material for a covered and wound ferrite ring core of the type mentioned, which is essentially based on an improved design of the trough .

Darüberhinaus wird eine einwandfreie, hermetisch dichte und mit geringstmöglichem Aufwand durchführbare Verbin­dung zwischen dem Trog und der Kappe angestrebt.In addition, a flawless, hermetically sealed connection that can be carried out with the least possible effort is sought between the trough and the cap.

Zur Lösung dieser Aufgabe sieht die Erfindung bei einem bewickelten Ferritringkern gemäß Oberbegriff des Patent­anspruches 1 vor, daß der Trog auf der Innenseite minde­stens einer der zueinander konzentrischen Trogwände ein­stückig an die Trogwand angeformte federnde Lappen auf­weist, die zumindest mit ihren freien Stirnkanten gegen den Ferritringkern anliegen, derart, daß der Ferritring­kern im Trog zentriert ist und daß die Kappe als Deckel ausgebildet ist, der hermetisch dicht auf der Stirnfläche der Trogwände befestigt, z.B. aufgeschweißt ist.To achieve this object, the invention provides in a wound ferrite ring core according to the preamble of claim 1, that the trough on the inside of at least one of the concentric trough walls integrally formed on the trough wall resilient tabs, which rest at least with their free end edges against the ferrite ring core, in such a way that the ferrite ring core is centered in the trough and that the cap is designed as a cover which hermetically seals onto the end face of the trough walls, for example is welded on.

Zur Schaffung eines Luftpolsters zwischen dem Ferritring­kern und der Trogaußenwand ist der Ferritringkern be­vorzugt mit Spiel im Trog angeordnet und durch die über den Trogumfang vorzugsmäßig gleichmäßig verteilten Lappen in seiner Lage zentriert und fixiert.In order to create an air cushion between the ferrite ring core and the outer wall of the trough, the ferrite ring core is preferably arranged with play in the trough and through the tabs which are preferably evenly distributed over the trough circumference centered and fixed in its position.

Die federnden Lappen gewährleisten eine quasi freie Zen­trierung und Fixierung des Ferritringkern im Trog und schaffen damit die Voraussetzung für die Bildung von Luftpolstern zwischen dem Ferritringkern und den Trog­wänden. Diese Luftpolster, deren Wirkung durch entspre­chende Wahl des Spiels zwischen dem Ferritringkern und den Trogwänden und auch durch Wahl einer geeigneten Federstärke der Lappen "einstellbar" ist, wirken als zusätzlicher Schutz für den blanken Ferritringkern beim Aushärten des Umhüllungswerkstoffes.The resilient tabs ensure a virtually free centering and fixing of the ferrite ring core in the trough and thus create the conditions for the formation of air cushions between the ferrite ring core and the trough walls. These air cushions, the effect of which can be "adjusted" by appropriate selection of the play between the ferrite ring core and the trough walls and also by selection of a suitable spring strength of the tabs, act as additional protection for the bare ferrite ring core when the cladding material hardens.

Die Erfindung wird nachstehend anhand von Ausführungsbei­spielen näher erläutert.
Es zeigt:

  • Fig. 1 eine Draufsicht auf einen Trog gemäß der Erfindung
  • Fig. 2 einen Schnitt gemäß der Linie 2, 2 nach Fig. 1, jedoch mit aufgelegtem, noch nicht verschweißtem Deckel und in vergrößertem Maßstab
  • Fig. 3 einen mit einem blanken Ferritringkern besetzten Trog nach Fig. 1, 2 mit aufgeschweißtem Deckel
  • Fig. 4 eine Seitenansicht für ein weiteres Ausführungs­beispiel eines Trogs, der mit einem Ferritring­kern besetzt, mit einem Deckel hermetisch dicht geschlossen und mit einer Wicklung bewickelt ist,
  • Fig. 5 eine Unteransicht der Anordnung nach Fig. 4.
The invention is explained in more detail below on the basis of exemplary embodiments.
It shows:
  • Fig. 1 is a plan view of a trough according to the invention
  • Fig. 2 shows a section along the line 2, 2 of FIG. 1, but with the lid on, not yet welded, and on an enlarged scale
  • Fig. 3 shows a trough with a bare ferrite ring core according to Fig. 1, 2 with a welded lid
  • 4 shows a side view of a further exemplary embodiment of a trough which has a ferrite ring core, is hermetically sealed with a cover and is wound with a winding,
  • 5 is a bottom view of the arrangement of FIG. 4th

In der Zeichnung sind gleiche Teile mit gleichen Bezugszei­chen bezeichnet.In the drawing, the same parts are identified by the same reference numerals.

Beim Ausführungsbeispiel nach Fig. 1 bis 3 weist der aus thermoplastischem Werkstoff gefertigte Trog 1 Trogwände 2, 5 auf. Die Stirnflächen der Trogwände 2, 5 besitzen zu­nächst - wie dies in Fig. 2 im Schnitt gezeigt ist - dach­artigen Querschnitt. Durch diesen Querschnitt wird beim Ultraschallschweißen, mittels dem der Deckel 6 mit seinen entsprechenden Stirnflächen auf die Stirnflächen des Trogs 1 aufgeschweißt wird, ein Höchstmaß an Energieübertragung im Schweißbereich erzielt.In the exemplary embodiment according to FIGS. 1 to 3, the trough 1 made of thermoplastic material has trough walls 2, 5 on. The end faces of the trough walls 2, 5 initially have a roof-like cross section, as shown in section in FIG. 2. This cross-section achieves a maximum of energy transfer in the welding area during ultrasonic welding, by means of which the cover 6 is welded with its corresponding end faces onto the end faces of the trough 1.

Der Trog 1 weist auf der Innenseite seiner Trogwand 2 fe­dernde Lappen 4 auf, die in aus einer zusätzlichen Wand 3 ausgesparten Nischen 8 einstückig an die Trogwand 2 an­geformt sind.
Bei in den Trog eingelegtem Ferritringkern 7 - siehe Fig. 2 und 3 - liegen die Lappen 4 mit ihren freien Stirnkanten gegen den Ferritringkern 7 an, derart, daß dieser im Trog 1 fixiert und zentriert ist. Der Ferritringkern 7 ist dabei mit Spiel im Trog 1 angeordnet, so daß in Abhängigkeit von der "Kerndicke" ein mehr oder weniger großes Luftpolster 9 zwischen dem Ferritringkern 7 und der Trogwand 5 gebildet wird. Zusätzliche Luftpolster bestehen in den Wandnischen 8 und je nach Stellung der Lappen 4 zwischen dem Ferrit­ringkern 7 und der hierzu gekehrten Wand 3.
Der durch den aufgeschweißten Deckel 6 hermetisch dicht geschlossene Trog 1 ist - was in der Zeichnung nicht dar­gestellt ist - mit Wicklungen 12 bewickelt und mit Gieß­harz oder thermoplastischem Kunstharz 15 umhüllt. Die beim Aushärten dieser Harze auftretenden hohen Schrumpf­drucke, die zu einer Zerstörung oder zumindest Beeinträch­tigung der technischen Daten der Ferritringkerne 7 führen können, werden durch die "Luftpolster" 9 abgefangen. Je nach dem zu erwartenden Schrumpfdruck wird das Spiel des Ferritringkerns 7 im Trog 1, d.h. das Luftpolster 9, und gegebenenfalls die Federstärke der Lappen 4 entsprechend gewählt.The trough 1 has on the inside of its trough wall 2 resilient tabs 4 which are integrally formed on the trough wall 2 in recesses 8 which are recessed from an additional wall 3.
When the ferrite ring core 7 is inserted into the trough - see FIGS. 2 and 3 - the tabs 4 lie with their free end edges against the ferrite ring core 7 in such a way that the latter is fixed and centered in the trough 1. The ferrite ring core 7 is arranged with play in the trough 1, so that a more or less large air cushion 9 is formed between the ferrite ring core 7 and the trough wall 5 depending on the "core thickness". Additional air cushions exist in the wall niches 8 and, depending on the position of the tabs 4, between the ferrite ring core 7 and the wall 3 facing them.
The trough 1, which is hermetically sealed by the welded-on cover 6, is - which is not shown in the drawing - wound with windings 12 and coated with casting resin or thermoplastic synthetic resin 15. The "air cushions" 9 absorb the high shrinkage pressures which occur when these resins cure and which can lead to destruction or at least impairment of the technical data of the ferrite ring cores 7. Depending on the expected shrinkage pressure, the play of the ferrite ring core 7 in the trough 1, ie the air cushion 9, and if necessary, the spring strength of the tabs 4 is selected accordingly.

Die Tröge können - wie dies in Fig. 4 und 5 gezeigt ist - einstückig an die innere Trogaußenwand angeformte Stege 18 zur Trennung der Wicklungspotentiale und einstückig an die Trogaußenseite angeformte Augen 10 als Träger von Anschluß­stiften 11 aufweisen. Abstandshalter 14, die gleichfalls einstückig an die Tröge angeformt sind, sorgen für die Einhaltung der nötigen Abstände der auf Leiterplatten aufgesetzten fertigen Drosseln.The troughs can - as shown in FIGS. 4 and 5 - have integrally molded webs 18 on the inner wall of the trough for separating the winding potentials and eyes 10 integrally molded on the outside of the trough as carriers of connecting pins 11. Spacers 14, which are also integrally formed on the troughs, ensure that the necessary distances of the finished chokes placed on printed circuit boards are maintained.

BezugszeichenlisteReference symbol list

  • 1 - Trog1 - trough
  • 2 - Trogwand2 - trough wall
  • 3 - Wand3 - wall
  • 4 - Lappen4 - rag
  • 5 - Trogwand5 - trough wall
  • 6 - Deckel6 - lid
  • 7 - Ferritringkern7 - ferrite ring core
  • 8 - Wandnischen8 - Wall niches
  • 9 - Luftpolster9 - air cushion
  • 10 - Augen10 - eyes
  • 11 - Anschlußstifte11 - connector pins
  • 12 - Wicklungen12 - windings
  • 13 - Wicklungen13 - windings
  • 14 - Abstandshalter14 - spacers
  • 15 - Kunstharz15 - synthetic resin
  • 18 - Stege18 - bridges

Claims (7)

1. Feuchtigkeitsdicht mit Gießharz oder thermoplastischem Kunstharz umhüllter, bewickelter Ferritringkern, der un­bewickelt in einen durch eine Kappe aus thermoplastischem Werkstoff geschlossenen, ringförmigen Trog aus thermo­plastischem Werkstoff eingesetzt ist und dessen Wicklung auf den Trog aufgebracht ist, dadurch gekenn­zeichnet, daß der Trog (1) auf der Innenseite min­destens einer seiner zueinander konzentrischen Trogwände (2, 5) einstückig an die Trogwand angeformte federnde Lappen (4) aufweist, die zumindest mit ihren freien Stirnkanten gegen den Ferritringkern (7) anliegen, derart, daß der Ferrit­ringkern (7) im Trog (1) zentriert ist, und daß die Kappe als Deckel (6) ausgebildet ist, der hermetisch dicht auf der Stirnfläche der Trogwände (2, 5) befestigt ist.1. Moisture-tight, coated with cast resin or thermoplastic synthetic resin, wound ferrite ring core, which is inserted unwrapped into an annular trough made of thermoplastic material closed by a cap made of thermoplastic material and whose winding is applied to the trough, characterized in that the trough (1) on the inside of at least one of its mutually concentric trough walls (2, 5) integrally formed on the trough wall resilient tabs (4), which at least rest with their free end edges against the ferrite ring core (7), such that the ferrite ring core (7) in the trough (1) is centered, and that the cap is designed as a cover (6) which is hermetically sealed on the end face of the trough walls (2, 5). 2. Bewickelter Ferritringkern nach Anspruch 1, dadurch gekennzeichnet, daß zur Schaffung eines Luft­polsters zwischen dem Ferritringkern und der Trogaußenwand der Ferritringkern (7) mit Spiel im Trog (1) angeordnet und durch die über den Trogumfang vorzugsweise gleichmäßig ver­teilt angeordneten Lappen (4) in seiner Stellung zentriert und fixiert ist.2. Wrapped ferrite ring core according to claim 1, characterized in that to create an air cushion between the ferrite ring core and the trough outer wall of the ferrite ring core (7) with play in the trough (1) and arranged through the trough circumference preferably evenly arranged tabs (4) in its position is centered and fixed. 3. Bewickelter Ferritringkern nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Lappen (4) in Wandnischen (8) der Trogwände (2, 5) angeordnet sind.3. Wrapped ferrite ring core according to claim 1 and 2, characterized in that the tabs (4) in wall recesses (8) of the trough walls (2, 5) are arranged. 4. Bewickelter Ferritringkern nach Anspruch 1, dadurch gekennzeichnet, daß an die äußere Trogwand (2) Augen (10) als Träger von Anschluß­stiften (11) einstückig angeformt sind.4. Wrapped ferrite ring core according to claim 1, characterized in that on the outer trough wall (2) eyes (10) as a carrier of connecting pins (11) are integrally formed. 5. Bewickelter Ferritringkern nach Anspruch 1, dadurch gekennzeichnet, daß der Deckel (6) mittels Ultraschallschweißen auf die Stirnflächen der Trogwände (2, 5) aufgeschweißt ist.5. A wound ferrite ring core according to claim 1, characterized in that the cover (6) is welded onto the end faces of the trough walls (2, 5) by means of ultrasonic welding. 6. Bewickelter Ferritringkern nach Anspruch 1 und 5, dadurch gekennzeichnet, daß die als Schweißflächen vorgesehenen Stirnflächen der Trogwände (2, 5) dachartigen Querschnitt aufweisen.6. Wrapped ferrite ring core according to claim 1 and 5, characterized in that the end faces of the trough walls (2, 5) provided as welding surfaces have a roof-like cross section. 7. Bewickelter Ferritringkern nach Anspruch 1 und einem der folgenden Ansprüche, dadurch gekenn­zeichnet, daß zur Trennung der unterschiedlichen Potentiale der Wicklungen (12, 13) an die äußere Metall­fläche der Troginnenwand (5) Stege (18, 18) angeformt sind.7. Wrapped ferrite ring core according to claim 1 and one of the following claims, characterized in that to separate the different potentials of the windings (12, 13) on the outer metal surface of the trough inner wall (5) webs (18, 18) are formed.
EP86115631A 1985-11-25 1986-11-11 Wound ferrite ring core impermeably encapsulated by a liquid resin or by a synthetic thermoplastic resin Ceased EP0226793A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541626 1985-11-25
DE3541626 1985-11-25

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EP (1) EP0226793A1 (en)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0436434A1 (en) * 1990-01-05 1991-07-10 Scherrer, Fernand Toroidal transformer
EP0465803A2 (en) * 1990-06-12 1992-01-15 Mitsubishi Denki Kabushiki Kaisha Current transformer mounting mechanism for circuit breaker
FR2688933A1 (en) * 1992-03-23 1993-09-24 Merlin Gerin ASSEMBLY OF A MAGNETIC TORE WITH A COIL.
EP0615269A1 (en) * 1993-03-09 1994-09-14 Hager Electro S.A. Device for detecting current unbalance, in particular for differential circuit breaker
EP0677856A1 (en) * 1990-09-28 1995-10-18 Mitsui Petrochemical Industries, Ltd. Container for storing an annular magnetic core
DE19633983C1 (en) * 1996-08-22 1997-08-28 Vacuumschmelze Gmbh Winding protection production for laminated cores
EP1134755A1 (en) * 2000-03-13 2001-09-19 Vacon Oyj Toroidal choking coil
US6849295B2 (en) 1996-08-22 2005-02-01 Vacuumschmelze Gmbh Method for producing a winding protection for tape-wound cores

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0234875Y2 (en) 1986-08-29 1990-09-19
US4851803A (en) * 1988-07-25 1989-07-25 E-Mon Corporation Split core insulator and locking device
DE4208396A1 (en) * 1992-03-16 1993-09-23 A F E Gmbh Allg Fertigungstech COMPONENT WITH FILM HOUSING AND METHOD FOR THE PRODUCTION THEREOF
US5629842A (en) * 1995-04-05 1997-05-13 Zero Emissions Technology Inc. Two-stage, high voltage inductor
JP3844068B2 (en) * 2002-06-21 2006-11-08 オムロン株式会社 Proximity sensor with improved positioning accuracy of detection coil peripheral members
US7329048B2 (en) * 2005-07-19 2008-02-12 Rolls-Royce Corporation Self contained squeeze film damping system
JP4282734B1 (en) * 2007-12-20 2009-06-24 株式会社東芝 Winding parts and electronic equipment
US10056184B2 (en) 2015-10-20 2018-08-21 Madison Daily Segmented core cap system for toroidal transformers

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387244A (en) * 1966-05-03 1968-06-04 Hermetic Coil Co Inc Transformer having winding leads held in pressure contact with terminals
US3465273A (en) * 1967-12-14 1969-09-02 Hunterdon Transformer Co Toroidal inductor
DE1639330A1 (en) * 1967-02-24 1970-06-04 Magnetics Inc Magnetic core and method of making the same
CH499188A (en) * 1968-08-02 1970-11-15 Telefunken Patent Pot core coil used in communications technology with several symmetrical windings, in particular Pupin's coil
GB1239439A (en) * 1968-12-24 1971-07-14
DE2058509A1 (en) * 1970-11-27 1972-05-31 Siemens Ag Radio interference suppression choke against impulsive interference voltages
US4107636A (en) * 1977-05-20 1978-08-15 Jerome Industries Corporation Plug-in adaptor
EP0072151A1 (en) * 1981-08-08 1983-02-16 The Marconi Company Limited Transformers
DE3324078A1 (en) * 1983-07-04 1985-01-17 Götz-Udo 6391 Grävenwiesbach Hartmann Insulating material housing
DE3330881A1 (en) * 1983-08-26 1985-03-14 Siemens AG, 1000 Berlin und 8000 München BRACKET FOR A PARTICULAR CURRENT COMPENSATED FERRITE RING CORE CHOKE

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1784833A (en) * 1930-03-01 1930-12-16 Western Electric Co Toroidal inductance device
US2216863A (en) * 1934-08-31 1940-10-08 Hartford Nat Bank & Trust Co Molding
US3132316A (en) * 1945-06-20 1964-05-05 Gustaf W Elmen Toroidol transformer having a core of closed laminations with fluid and non-fluid inslation therebetween
US3018455A (en) * 1955-05-24 1962-01-23 Magnetics Inc Apparatus for encasing magnetic cores
US2975386A (en) * 1955-10-11 1961-03-14 Carl E Coy Toroidal electromagnetic device
US3148346A (en) * 1958-08-01 1964-09-08 Westinghouse Electric Corp Magnetic cores hermetically sealed within anodized aluminum core boxes
FR1325184A (en) * 1962-04-26 1963-04-26 Landis & Gyr Sa Coil body
DE1163930B (en) * 1963-03-30 1964-02-27 Telefunken Patent Plastic housing for receiver
US3290635A (en) * 1964-02-07 1966-12-06 Westinghouse Electric Corp Damped magnetic cores
US3649939A (en) * 1970-01-13 1972-03-14 Standard Int Corp Electrical component
US3648337A (en) * 1970-08-24 1972-03-14 Mallory & Co Inc P R Encapsulating of electronic components
DE2245197C3 (en) * 1972-09-14 1978-11-02 Siemens Ag, 1000 Berlin Und 8000 Muenchen Kitchen sink
US4510476A (en) * 1983-06-21 1985-04-09 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration High voltage isolation transformer

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387244A (en) * 1966-05-03 1968-06-04 Hermetic Coil Co Inc Transformer having winding leads held in pressure contact with terminals
DE1639330A1 (en) * 1967-02-24 1970-06-04 Magnetics Inc Magnetic core and method of making the same
US3465273A (en) * 1967-12-14 1969-09-02 Hunterdon Transformer Co Toroidal inductor
CH499188A (en) * 1968-08-02 1970-11-15 Telefunken Patent Pot core coil used in communications technology with several symmetrical windings, in particular Pupin's coil
GB1239439A (en) * 1968-12-24 1971-07-14
DE2058509A1 (en) * 1970-11-27 1972-05-31 Siemens Ag Radio interference suppression choke against impulsive interference voltages
US4107636A (en) * 1977-05-20 1978-08-15 Jerome Industries Corporation Plug-in adaptor
EP0072151A1 (en) * 1981-08-08 1983-02-16 The Marconi Company Limited Transformers
DE3324078A1 (en) * 1983-07-04 1985-01-17 Götz-Udo 6391 Grävenwiesbach Hartmann Insulating material housing
DE3330881A1 (en) * 1983-08-26 1985-03-14 Siemens AG, 1000 Berlin und 8000 München BRACKET FOR A PARTICULAR CURRENT COMPENSATED FERRITE RING CORE CHOKE

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0436434A1 (en) * 1990-01-05 1991-07-10 Scherrer, Fernand Toroidal transformer
WO1991010244A1 (en) * 1990-01-05 1991-07-11 Scherrer, Fernand Toric-type transformer
FR2656951A1 (en) * 1990-01-05 1991-07-12 Scherrer Fernand TORQUE TYPE TRANSFORMER.
EP0465803A2 (en) * 1990-06-12 1992-01-15 Mitsubishi Denki Kabushiki Kaisha Current transformer mounting mechanism for circuit breaker
EP0465803A3 (en) * 1990-06-12 1992-07-08 Mitsubishi Denki Kabushiki Kaisha Current transformer mounting mechanism for circuit breaker
EP0677856A1 (en) * 1990-09-28 1995-10-18 Mitsui Petrochemical Industries, Ltd. Container for storing an annular magnetic core
EP0562970A1 (en) * 1992-03-23 1993-09-29 Schneider Electric Sa Assembly of a toroidal core with coil
FR2688933A1 (en) * 1992-03-23 1993-09-24 Merlin Gerin ASSEMBLY OF A MAGNETIC TORE WITH A COIL.
EP0615269A1 (en) * 1993-03-09 1994-09-14 Hager Electro S.A. Device for detecting current unbalance, in particular for differential circuit breaker
FR2702605A1 (en) * 1993-03-09 1994-09-16 Hager Electro Current imbalance detection device, in particular for differential switch.
DE19633983C1 (en) * 1996-08-22 1997-08-28 Vacuumschmelze Gmbh Winding protection production for laminated cores
US6849295B2 (en) 1996-08-22 2005-02-01 Vacuumschmelze Gmbh Method for producing a winding protection for tape-wound cores
EP1134755A1 (en) * 2000-03-13 2001-09-19 Vacon Oyj Toroidal choking coil
US6583706B2 (en) 2000-03-13 2003-06-24 Vacon Oyj Toroidal choking coil

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FI864780A0 (en) 1986-11-24
US4728919A (en) 1988-03-01
FI864780A (en) 1987-05-26

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