EP0096807A2 - Electrical transformer - Google Patents

Electrical transformer Download PDF

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Publication number
EP0096807A2
EP0096807A2 EP83105461A EP83105461A EP0096807A2 EP 0096807 A2 EP0096807 A2 EP 0096807A2 EP 83105461 A EP83105461 A EP 83105461A EP 83105461 A EP83105461 A EP 83105461A EP 0096807 A2 EP0096807 A2 EP 0096807A2
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EP
European Patent Office
Prior art keywords
winding
core
carrier
section
electrical transformer
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
EP83105461A
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German (de)
French (fr)
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EP0096807B1 (en
EP0096807A3 (en
Inventor
Herrmann Dipl.-Ing. Hubert
Anton Kvoch
Ernst Paulik
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Siemens AG
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT83105461T priority Critical patent/ATE22502T1/en
Publication of EP0096807A2 publication Critical patent/EP0096807A2/en
Publication of EP0096807A3 publication Critical patent/EP0096807A3/en
Application granted granted Critical
Publication of EP0096807B1 publication Critical patent/EP0096807B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F19/00—Fixed transformers or mutual inductances of the signal type

Definitions

  • the invention relates to an electrical transformer with a magnetizable core and with an insulating material winding support pushed onto the core for the galvanically separated primary and secondary windings.
  • ferrite material or metal alloy is advantageously used as the material for the core for magnetic and economic reasons, it being possible for these two materials to overlap in the area of application.
  • the transformer is of particular importance in that it has the above-mentioned galvanic isolation of primary and secondary windings by inductive coupling, an adjustment of the output resistance of the voltage source to the input resistance of the load is achieved by correct choice of the number of turns, and at the same time voltage and current translations good efficiency can be achieved.
  • the electrical insulation and the primary and secondary windings from one another and the electrical isolation between the primary and secondary windings must be accomplished by the complex and, in particular, time-consuming insertion of insulating foils between the individual windings.
  • the windings on both ends of the winding carrier are moved, which results in unused winding space.
  • the present invention is based on the object of designing a transformer of the type mentioned at the outset, which can be wound fully automatically by means of an insulating film without the winding insulation and electrical isolation required hitherto and nevertheless complies with VDE regulation 0860.
  • the transformer should have the option of variable nesting of the windings; i.e. offer the possibility of using a winding technique that varies from case to case, since this is the only way to achieve optimal coupling and low leakage inductance.
  • the invention proposes an electrical transmitter of the type mentioned at the outset, which according to the invention has at least two cylindrical winding carriers of different cross-section and any cross-sectional shape, which are plugged into one another and each wound with the primary or secondary windings.
  • the winding carriers which preferably have an annular cross section, can each be divided into winding chambers, the number and chamber height of which are selected to match the desired nesting of the windings.
  • the potential separation of the primary and secondary windings and the electrical insulation of the individual windings from one another is thus ensured by the thickness of the winding support wall or by the height and thickness of the chamber partition walls.
  • the winding carrier of the smallest cross-section has on one end face a one-piece molded or also plugged-on carrier flange which has contact terminal strips, in particular on opposite sides, in particular contact pin terminal strips for the primary and secondary windings.
  • Ring flanges are preferably formed on the end faces of the individual winding carriers facing away from the carrier flange, such that the flange outer diameter of the winding carrier of smaller cross-section corresponds approximately to the inside diameter of the next following winding carrier of larger cross-section.
  • the height and thickness of the winding carrier flanges and the spatially separate connection of the primary and secondary windings to the contact pins of the respective opposite contact terminal strips also ensure that the necessary creepage distance is maintained.
  • the optional change in the number and height of the chambers of the individual winding carriers also enables the coupling to be optimally adapted to the individual application.
  • the fully automatic winding can be carried out without any problems.
  • a further simplified automatic winding is possible if the winding carriers attached to the winding carrier with the smallest cross-section are additionally in several parts.
  • the invention is explained in more detail below using an exemplary embodiment.
  • the single figure shows a winding carrier equipped with a carrier flange and its associated E-core halves in a partially exploded, perspective and partly broken view. For better illustration The illustration of the windings was omitted in the figure.
  • a carrier flange 11 is integrally formed or attached to the front end of the winding carrier 9 facing away from the flange 17 and has contact terminal strips 12, 13 for contact pins 14 which are separated into individual elements.
  • the partition wall 24 and the carrier flange 11 are provided with open-edge recesses 26, which are used for the positionally secure supply of the winding ends 25 to the contact pins 14.
  • the carrier flange 11 has openings 15, 16 in its area lying between the contact connection parts 12, 13, through which an E-core half 2 is guided with its outer legs 6, 7.
  • This and the second E-core half 1 dip in the assembled state with their central slugs 8 and 4, respectively, into the interior of the winding support, which is enclosed by the winding support 9, so that the mutually facing string surfaces of the legs 3, 6 and 5, 7 lying one above the other and the end faces the central slugs 4, 8 are spaced apart to form an air gap.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Insulated Conductors (AREA)
  • Led Devices (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Organic Insulating Materials (AREA)
  • Details Of Television Scanning (AREA)

Abstract

1. An electrical transformer comprising a magnetizable core, in particular a ferrite core, and at least two cylindrical winding carriers (9, 10) made of insulating material and of different cross-section, which are slipped on to the core and possibly divided, into winding chambers, and on to which the primary and secondary windings are wound so as to be fitted in one another and electrically separated, characterized in that at its one end face, the winding carrier (9) of the smallest cross-section has an integral carrier flange (11) which has contact pin connection strips (12, 13) arranged on opposite sides of the carrier flange and which serve for the primary and secondary windings ; that as a magnetizable core, E-core halves (1, 2) are provided, one E-core half (2) of which passes through openings (15, 16) in the carrier flange (11) at its outer flanks (6, 7) ; and that the central core parts (4, 8) of the two E-core halves extend into the enclosed space of the winding carrier (9) of the smallest cross-section.

Description

Die Erfindung betrifft einen elektrischen Übertrager mit einem magnetisierbaren Kern und mit auf den Kern aufgeschobenem Isolierstoff-Wickelträger für die galvanisch getrennten Primär- und Sekundärwicklungen.The invention relates to an electrical transformer with a magnetizable core and with an insulating material winding support pushed onto the core for the galvanically separated primary and secondary windings.

Je nach Frequenzgebiet wird dabei aus magnetischen und wirtschaftlichen Gründen vorteilhafterweise Ferritmaterial oder Metallegierung als Werkstoff für den Kern eingesetzt, wobei sich diese beiden Werkstoffe im Anwendungsbereich überlappen können. Eine besondere Bedeutung kommt dem Übertrager dadurch zu, daß er durch induktive Kopplung die vorstehend erwähnte galvanische Trennung von Primär- und Sekundärwicklungen aufweist, durch richtige Wahl des Windungszahlverhältnisses eine Anpassung des Ausgangswiderstandes der Spannungsquelle zum Eingangswiderstand der Last erreicht wird und gleichzeitig Spannungs- und Stromübersetzungen bei gutem Wirkungsgrad erzielt werden.Depending on the frequency range, ferrite material or metal alloy is advantageously used as the material for the core for magnetic and economic reasons, it being possible for these two materials to overlap in the area of application. The transformer is of particular importance in that it has the above-mentioned galvanic isolation of primary and secondary windings by inductive coupling, an adjustment of the output resistance of the voltage source to the input resistance of the load is achieved by correct choice of the number of turns, and at the same time voltage and current translations good efficiency can be achieved.

Bei der Fertigung der bisher bekannten elektrischen Übertrager vorstehender Art muß die elektrische Isolierung und der Primär- und Sekundärwicklung gegeneinander und die Potentialtrennung zwischen den Primär- und Sekundärwicklungen durch das aufwendige und insbesondere zeitraubende Einlegen von Isolierfolien zwischen die einzelnen Wicklungen bewerkstelligt werden. Zusätzlich müssen, um den Forderungen des VDE hinsichtlich ausreichender Kriechstrecken zwischen den Primär- und Sekundärwicklungen zu genügen, die Wicklungen an beiden Stirnenden der Wickelträger wingerückt werden, was ungenutzten Wickelraum zur Folge hat.In the manufacture of the previously known electrical transformers of the above type, the electrical insulation and the primary and secondary windings from one another and the electrical isolation between the primary and secondary windings must be accomplished by the complex and, in particular, time-consuming insertion of insulating foils between the individual windings. In addition, in order to meet the requirements of the VDE regarding sufficient creepage distances between the primary and Sufficient secondary windings, the windings on both ends of the winding carrier are moved, which results in unused winding space.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Übertrager der eingangs genannten Art zu gestalten, der ohne die bisher erforderliche Wicklungsisolation und Potentialtrennung mittels Isolierfolie vollautomatisch bewickelbar ist und trotzdem der VDE-Bestimmung 0860 entspricht. Darüberhinaus soll der- Übertrager die Möglichkeit variabler Verschachtelung der Wicklungen; d.h. die Möglichkeit der Anwendung einer von Fall zu Fall variierenden Wickeltechnik bieten, da nur so eine letzlich optimale Verkopplung und niedrige Streuinduktivität erhalten werden.The present invention is based on the object of designing a transformer of the type mentioned at the outset, which can be wound fully automatically by means of an insulating film without the winding insulation and electrical isolation required hitherto and nevertheless complies with VDE regulation 0860. In addition, the transformer should have the option of variable nesting of the windings; i.e. offer the possibility of using a winding technique that varies from case to case, since this is the only way to achieve optimal coupling and low leakage inductance.

Zur Lösung dieser Aufgabe schlägt die Erfindung einen elektrischen Überträger der eingangs genannten Art vor, der erfindungsgemäßO mindestens zwei zylindrische Wickelträger unterschiedlichen Querschnitts und beliebiger Querschnittsform aufweist, die ineinandergesteckt und jeweils mit den Primär- bzw. Sekundärwicklungen bewickelt sind.To achieve this object, the invention proposes an electrical transmitter of the type mentioned at the outset, which according to the invention has at least two cylindrical winding carriers of different cross-section and any cross-sectional shape, which are plugged into one another and each wound with the primary or secondary windings.

Die Wickelträger, die vorzugsweise kreisringförmigen Querschnitt aufweisen, können jeweils in Wickelkammern aufgeteilt sein, deren Anzahl und Kammerhöhe in Anpassung an die gewünschte Verschachtelung der Wicklungen gewählt ist. Die Potentialtrennung der Primär- und Sekundärwicklungen und die elektrische Isolation der einzelnen Wicklungen gegeneinander ist so durch die Dicke der Wickelträger-Wandung bzw. durch die Höhe und Dicke der Kammertrennwände gewährleistet.The winding carriers, which preferably have an annular cross section, can each be divided into winding chambers, the number and chamber height of which are selected to match the desired nesting of the windings. The potential separation of the primary and secondary windings and the electrical insulation of the individual windings from one another is thus ensured by the thickness of the winding support wall or by the height and thickness of the chamber partition walls.

Bevorzugt besitzt der Wickelträger kleinsten Querschnitts an seinem einen Stirnenden einen einstückig angeformten oder auch aufgesteckten Trägerflansch, der insbesondere auf gegenüberliegenden Seiten Kontaktanschlußleisten, insbesondere Kontaktstiftanschlußleisten für die Primär- und Sekundärwicklungen aufweist. An die vom Trägerflansch abgekehrten Stirnseiten der einzelnen Wickelträger sind dabei vorzugsweise Ringflansche angeformt, derart, daß jeweils der Flanschaußendurchmesser des Wickelträgers kleineren Querschnitts etwa dem Innendurchmesser des nächstfolgenden Wickelträgers größeren Querschnitts entspricht. Durch die Höhe und die Dicke der Wickelträger-Flansche und durch den räumlich getrennten Anschluß der Primär-und Sekundärwiclungen an die Kontaktstifte der jeweils gegebnüberliegenden Kontaktanschlußleisten, ist auch die Einhaltung der notwendigen Kriechstrecke gewährleistet. Die wahlweise Änderung der Anzahl und Höhe der Kammern der einzelnen Wickelträger ermöglicht darüberhinaus eine optimale Anpassung der Verkopplung an den einzelnen Anwendungsfall.Preferably, the winding carrier of the smallest cross-section has on one end face a one-piece molded or also plugged-on carrier flange which has contact terminal strips, in particular on opposite sides, in particular contact pin terminal strips for the primary and secondary windings. Ring flanges are preferably formed on the end faces of the individual winding carriers facing away from the carrier flange, such that the flange outer diameter of the winding carrier of smaller cross-section corresponds approximately to the inside diameter of the next following winding carrier of larger cross-section. The height and thickness of the winding carrier flanges and the spatially separate connection of the primary and secondary windings to the contact pins of the respective opposite contact terminal strips also ensure that the necessary creepage distance is maintained. The optional change in the number and height of the chambers of the individual winding carriers also enables the coupling to be optimally adapted to the individual application.

Durch die Aufteilung des Wickelträgers in mehrere Wickelträger ist die vollautomatische Bewicklung problemlos durchführbar. Eine weiter-vereinfachte automatische Bewickelung ist möglich, wenn auch die auf den Wickelträger kleinsten Querschnitts aufgesteckten Wickelträger zusätzlich mehrteilig sind.Due to the division of the winding carrier into several winding carriers, the fully automatic winding can be carried out without any problems. A further simplified automatic winding is possible if the winding carriers attached to the winding carrier with the smallest cross-section are additionally in several parts.

Die Erfindung wird nachstehend anhand eine Ausführungsbeispiels näher erläutert. Die einzige Figur zeigt dabei einen mit einem Trägerflansch ausgerüsteten Wickelträger und seine zugehörigen E-Kernhälften in teilweise auseinandergezogener, perspektivischer und teils gebrochener Ansicht. Zur besseren Veranschaulichung wurde in der Figur auf die Darstellung der Wicklungen verzichtet.The invention is explained in more detail below using an exemplary embodiment. The single figure shows a winding carrier equipped with a carrier flange and its associated E-core halves in a partially exploded, perspective and partly broken view. For better illustration The illustration of the windings was omitted in the figure.

Mit 9, 10 sind ineinandergesteckte zylindrische Wickelträger kreisringförmigen Querschnitts bezeichnet, die Flansche 17, bzw. 20 aufweisen und durch Trennwände 18, 19 bzw. 21, 22, 23, 24 in Kammern aufgeteilt sind. An das vom Flansch 17 abgekehrte Stirnende des Wickelträgers 9 ist ein Trägerflansch 11 einstückig angeformt oder aufgesteckt, der in Einzelelemente aufgetrennte - Kontaktanschlußleisten 12, 13 für Kontaktstifte 14 besitzt. Im gezeigten Ausführungsbeispiel ist die Trennwand 24 und der Trägerflansch 11 mit randoffenen Ausnehmungen 26 ausgestattet, die zur lagegesicherten Zuführung der Wickelenden 25 zu den Kontaktstiften 14 dienen.9, 10 are nested cylindrical winding carriers of circular cross-section, which have flanges 17 and 20 and are divided into chambers by partitions 18, 19 and 21, 22, 23, 24. A carrier flange 11 is integrally formed or attached to the front end of the winding carrier 9 facing away from the flange 17 and has contact terminal strips 12, 13 for contact pins 14 which are separated into individual elements. In the exemplary embodiment shown, the partition wall 24 and the carrier flange 11 are provided with open-edge recesses 26, which are used for the positionally secure supply of the winding ends 25 to the contact pins 14.

Der Trägerflansch 11 besitzt in seinem zwischen den Kontaktanschlußteilen 12, 13 liegenden Bereich Durchbrechungen 15, 16 durch welche eine E-Kernhälfte 2 mit ihren äußeren Schenkeln 6, 7 geführt ist. Diese und die zweite E-Kernhälfte 1 tauchen im montierten Zustand mit ihren Mittelbutzen 8 bzw. 4 in das vom Wickelträger 9 umschlossene Innere des Wickelträgers ein, so daß die einander zugekehrten Strinflächen der Schenkel 3, 6 bzw. 5,7 aufeinanderliegenden und die Stirnflächen der Mittelbutzen 4, 8 unter Bildung eines Luftspalts zueinander beabstandet sind.The carrier flange 11 has openings 15, 16 in its area lying between the contact connection parts 12, 13, through which an E-core half 2 is guided with its outer legs 6, 7. This and the second E-core half 1 dip in the assembled state with their central slugs 8 and 4, respectively, into the interior of the winding support, which is enclosed by the winding support 9, so that the mutually facing string surfaces of the legs 3, 6 and 5, 7 lying one above the other and the end faces the central slugs 4, 8 are spaced apart to form an air gap.

Claims (8)

1. Elektrischer Übertrager mit einem magnetisierbaren Kern, insbesondere Ferritkern, und mit auf den Kern aufgeschobenem Isolierstoff-Wickelträger für die galvanisch getrennten Primär- und Sekundärwickelungen, gekennzeichnet, durch mindesten zwei zylindrische Wickelträger (9,10) unterschiedlichen Querschnitts, die ineinandergesteckt und mit den Primär- bzw. Sekundärwicklungen bewickelt sind.1. Electrical transformer with a magnetizable core, in particular ferrite core, and with an insulating material winding support pushed onto the core for the electrically isolated primary and secondary windings, characterized by at least two cylindrical winding supports (9, 10) of different cross-section, which are inserted into one another and with the Primary or secondary windings are wound. 2. Elektrischer Übertrager nach Anspruch 1, dadurch gekennzeichnet, daß der Wickelträger (9) kleinsten Querschnitts an seinem einen Stirnende einen sinstückig angeformten Trägerflansch (11) für Kontaktanschlußleisten (12, 13) für Primär- und Sekundärwicklungen aufweist.2. Electrical transformer according to claim 1, characterized in that the winding carrier (9) of the smallest cross-section has at its one end a sin-shaped molded carrier flange (11) for contact terminal strips (12, 13) for primary and secondary windings. 3. Elektrischer Übertrager nach Ansporuch 1 und 2, dadurch gekennzeichnet, daß als Kontaktanschlußleisten Kontaktstiftanschlußleisten vorgesehen sind, die auf gegenüberliegenden Seiten des Trägerflansches (11) angeordnet sind.3. Electrical transformer according to Ansporuch 1 and 2, characterized in that contact pin connection strips are provided as contact connection strips, which are arranged on opposite sides of the carrier flange (11). 4. Elektrischer Übertrager nach Anspruch 1, dadurch ggekennzeichnet , daß die Wickelträger (9, 10) kreisringförmigen Querschnitt aufweisen.4. Electrical transformer according to claim 1, characterized in that the winding carriers (9, 10) have an annular cross section. 5. Elektrischer Übertrager nach Anspruch 1 und einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß an die vom Trägerflansch (11) abgekehrten Strinseiten der Wickelträger (9, 10) vorzugsweise Ringflansche (17, 20) angeformt sind, derart, daß jeweils der Flanschaußendurchmesser des Wickelträgers (9) kleineren Querschnitts etwa dem Innendurchmesser des nächstfolgenden Wickelträgers (10) größeren Querschnitts entspricht.5. Electrical transformer according to claim 1 and one of the preceding claims, characterized in that on the facing from the carrier flange (11) facing the sides of the winding carrier (9, 10) preferably ring flanges (17, 20) are formed such that the respective flange outer diameter of Winding carrier (9) of smaller cross-section corresponds approximately to the inside diameter of the next following winding carrier (10) of larger cross-section. 6. Elektrischer Übertrager nach Anspruch 1 und einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Wickelträger (9, 10) in Wickelkammern aufgeteilt sind, deren Anzahl und Kammerhöhe in Anpassung an die gewünschte Verschachtelung der Wicklungen gewählt ist.6. Electrical transformer according to claim 1 and one of the preceding claims, characterized in that the winding carriers (9, 10) are divided into winding chambers, the number and chamber height is selected in adaptation to the desired nesting of the windings. 7. Elektrischer Übertrager nach Anpruch 1 und einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die auf den Wickelträger (9) kleinsten Querschnitts aufgesteckten Wickelträger (10) mehrteilig sind.7. Electrical transformer according to claim 1 and one of the preceding claims, characterized in that the winding carrier (10) with the smallest cross-section attached to the winding carrier (9) are in several parts. 8. Elektrischer Übertrager nach Anspruch 1 und einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß als megnetisierbarer Kern E-Kernhälften (1, 2) vorgesehen sind, daß die eine E-Kernhälfte (2) mit ihren äußeren Schenkeln (6, 7) durch Durchbrechungen (15, 16) im Trägerflansch (11) gereift und daß die Mittelbutzen (4, 8) der beiden E-Kernhälften in den umhüllten Raum des Wickelträgers (9) kleinsten Querschnitts eintauchen.8. Electrical transformer according to claim 1 and one of the preceding claims, characterized in that E-core halves (1, 2) are provided as the megnetizable core that the one E-core half (2) with its outer legs (6, 7) through Openings (15, 16) in the carrier flange (11) matured and that the central slugs (4, 8) of the two E-core halves are immersed in the enveloped space of the winding carrier (9) with the smallest cross-section.
EP83105461A 1982-06-11 1983-06-01 Electrical transformer Expired EP0096807B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83105461T ATE22502T1 (en) 1982-06-11 1983-06-01 ELECTRICAL TRANSMITTER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823222027 DE3222027A1 (en) 1982-06-11 1982-06-11 ELECTRIC TRANSMITTER
DE3222027 1982-06-11

Publications (3)

Publication Number Publication Date
EP0096807A2 true EP0096807A2 (en) 1983-12-28
EP0096807A3 EP0096807A3 (en) 1984-05-02
EP0096807B1 EP0096807B1 (en) 1986-09-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP83105461A Expired EP0096807B1 (en) 1982-06-11 1983-06-01 Electrical transformer

Country Status (5)

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EP (1) EP0096807B1 (en)
AT (1) ATE22502T1 (en)
DE (2) DE3222027A1 (en)
ES (1) ES281210Y (en)
FI (1) FI74164C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987002836A1 (en) * 1985-10-31 1987-05-07 The South East Queensland Electricity Board Intertripping system
GB2213651A (en) * 1987-12-09 1989-08-16 Toshiba Kk High-frequency transformer for microwave oven
AU599056B2 (en) * 1985-10-31 1990-07-12 South East Queensland Electricity Corporation Intertripping system
US6951268B2 (en) * 2001-02-10 2005-10-04 Robert Bosch Gmbh System for transmitting energy and/or data between a vehicle body and a removable part
DE102008017314A1 (en) * 2008-04-04 2009-10-08 Vogt Electronic Components Gmbh Inductive component for the control of luminaires

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8401185A (en) * 1984-04-13 1985-11-01 Philips Nv TRANSFORMER WITH COAXIAL COILS.
DE3620306A1 (en) * 1986-06-18 1987-12-23 Siemens Ag Electrical multi-chamber coil former
DE4120771A1 (en) * 1991-06-24 1993-01-07 Philips Patentverwaltung TRANSFORMER WITH A SPOOL BODY MADE OF PLASTIC

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR617370A (en) * 1925-06-12 1927-02-18 Thomson Houston Comp Francaise Improvements made to electrical transformers
JPS54140134A (en) * 1978-04-24 1979-10-31 Hitachi Ltd Flyback transformer
GB2039156A (en) * 1978-11-29 1980-07-30 Hitachi Ltd Transformer
FR2457000A1 (en) * 1979-05-14 1980-12-12 Victor Company Of Japan Accurate gap setting for transducer core - inserting non-magnetic round wire to determine gap dimension

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR617370A (en) * 1925-06-12 1927-02-18 Thomson Houston Comp Francaise Improvements made to electrical transformers
JPS54140134A (en) * 1978-04-24 1979-10-31 Hitachi Ltd Flyback transformer
GB2039156A (en) * 1978-11-29 1980-07-30 Hitachi Ltd Transformer
FR2457000A1 (en) * 1979-05-14 1980-12-12 Victor Company Of Japan Accurate gap setting for transducer core - inserting non-magnetic round wire to determine gap dimension

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Band 3, Nr. 159 (E-162), 27. Dezember 1979, Seite 112 E 162 & JP - A - 54 140 134 (HITACHI SEISAKUSHO K.K.) 31.10.1979 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987002836A1 (en) * 1985-10-31 1987-05-07 The South East Queensland Electricity Board Intertripping system
AU599056B2 (en) * 1985-10-31 1990-07-12 South East Queensland Electricity Corporation Intertripping system
GB2213651A (en) * 1987-12-09 1989-08-16 Toshiba Kk High-frequency transformer for microwave oven
US4885445A (en) * 1987-12-09 1989-12-05 Kabushiki Kaisha Toshiba High-frequency transformer for microwave oven
GB2213651B (en) * 1987-12-09 1991-12-04 Toshiba Kk High-frequency transformer for microwave oven
US6951268B2 (en) * 2001-02-10 2005-10-04 Robert Bosch Gmbh System for transmitting energy and/or data between a vehicle body and a removable part
DE102008017314A1 (en) * 2008-04-04 2009-10-08 Vogt Electronic Components Gmbh Inductive component for the control of luminaires
DE102008017314B4 (en) * 2008-04-04 2015-10-29 SUMIDA Components & Modules GmbH Inductive component and electronic circuit for controlling a luminaire

Also Published As

Publication number Publication date
DE3222027A1 (en) 1983-12-15
DE3366418D1 (en) 1986-10-30
EP0096807B1 (en) 1986-09-24
FI74164C (en) 1987-12-10
ATE22502T1 (en) 1986-10-15
FI74164B (en) 1987-08-31
ES281210U (en) 1985-03-01
FI832107A0 (en) 1983-06-10
ES281210Y (en) 1985-10-16
EP0096807A3 (en) 1984-05-02
FI832107L (en) 1983-12-12

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