EP0133661A2 - Petit transformateur - Google Patents

Petit transformateur Download PDF

Info

Publication number
EP0133661A2
EP0133661A2 EP84108616A EP84108616A EP0133661A2 EP 0133661 A2 EP0133661 A2 EP 0133661A2 EP 84108616 A EP84108616 A EP 84108616A EP 84108616 A EP84108616 A EP 84108616A EP 0133661 A2 EP0133661 A2 EP 0133661A2
Authority
EP
European Patent Office
Prior art keywords
coil
metal foil
foil frame
small transformer
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
EP84108616A
Other languages
German (de)
English (en)
Other versions
EP0133661B1 (fr
EP0133661A3 (en
Inventor
Ulrich Dipl.-Ing. Sobottka
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to AT84108616T priority Critical patent/ATE23234T1/de
Publication of EP0133661A2 publication Critical patent/EP0133661A2/fr
Publication of EP0133661A3 publication Critical patent/EP0133661A3/de
Application granted granted Critical
Publication of EP0133661B1 publication Critical patent/EP0133661B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • 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
    • H01F27/325—Coil bobbins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material

Definitions

  • the invention relates to a small transformer according to the preamble of claim 1; such a transformer is known from DE-GM 71 05 903.
  • the primary winding is separated from the secondary winding lying adjacent in the axial direction of the transformer core by an electrically insulating dividing wall is angled in the axial direction on its outer edge and is correspondingly axially extended to achieve the required air and creepage distances.
  • the partition is either a deep-drawn insulating film inserted between the flanges of the bobbins of the primary and secondary windings, with an extended one in the axial direction of the coils. current approach provided or the end flange of the primary winding itself is used as a partition and provided with an axially directed approach molded to the circumferential approach of the thermoformed insulating film.
  • a safe static protective shielding between the primary and secondary sides of the small transformer can also be ensured with little manufacturing and assembly effort and with a small installation size.
  • Such protective shielding is required, for example, in the case of transformers for devices in consumer electronics or in medicine.
  • a transformer with a concentric arrangement of primary and secondary windings is usually used for this and a metal shield is inserted between the concentric windings for mutual shielding and covers at least the full width of one of the two adjacent windings. With additional insulation barriers, the necessary clearances and air and creepage distances between the metal shield and windings must be guaranteed.
  • the construction of the invention allows in manufacturing and assembly technology, low-complexity manner a two-chamber transformer whose bobbin are primary and secondary sides independently of each other can be wound, and wherein when plugging dü 3 getennten coil body on the transformer core by simply interposing the metal film frame a shielded compared to transformers with concentric coils much better damping of high-frequency interference voltages can be achieved.
  • the interference voltage is attenuated by 20 dB more than a comparable shielded concentric winding.
  • the metal foil frame is interrupted by a slot.
  • the one adjacent end flange of the one bobbin is provided on its outer edge with a collar axially overlapping the adjacent end flange of the other bobbin and the metal foil frame is inserted into the end flange pot formed by the end flange and collar; this ensures, on the one hand, a simple plug-in technique for the two coil formers to be installed one behind the other with increased clearance and creepage distance due to the collar design, and, on the other hand, a secure fixing of the metal foil frame which can be achieved in one operation.
  • the metal foil frame is provided with a corresponding oversize at least over a part of its outer edge, then when the two bobbins are inserted into one another as described above, the edge part of the metal foil frame which has just been punched can be bent at the same time in such a way that it is connected to the outside with a connecting part from the assembled bobbins protrudes and is accessible for a solder connection of an outer protective conductor.
  • An undesired contact of the metal foil frame with the transformer core can be prevented in a simple manner in the inventive design of an isolating transformer by providing the two adjacent end flanges of the coil formers with circumferential, axially directed formations on their inner edges, which interlock when the coil formers are mounted and which Reach under the central opening of the metal foil frame; at the same time, these projections can be used in an advantageous manner for aligning the two bobbins of the two-chamber transformer which are connected one behind the other.
  • FIGS. 1 and 2 show the bobbins 1 and 2 arranged one behind the other in the coil axis A, but not yet put together in their final assembly position, for a primary winding to be applied to the bobbin 1 and a user-side secondary winding to be applied to the bobbin 2 with between the two bobbins 1 , 2 arranged metal foil frame 3.
  • Each coil body consists at least of a hollow body 11 or 21, which encloses the transformer core (not shown here) on the inside, onto which the primary winding or secondary winding (also not shown here) is wound, and radially projecting end flanges 12, 13 and 22, 23 for frontal limitation of the primary and secondary winding spaces.
  • the right end flange of the coil body 1 is provided on its outer edge with an axially directed to the adjacent end flange 23 of the coil body 2 collar 131, so that an end flange pot is formed from the actual end flange 13 and the molded collar 131.
  • the adjacent end flange 23 of the bobbin 2 is shaped and dimensioned in its radial extent that it can be inserted in a form-fitting manner in the end flange pot 13, 131 of the bobbin 1.
  • the metal foil frame 3 is provided with such an oversize that a corresponding edge part is bent over when the coil formers 1, 2 are plugged together in the form of an externally accessible connecting part 35 and with a soldering tab connection 37 provided for a ground connection from the assembled coil formers 1, 2 protrudes.
  • the metal foil frame 3 shown in FIG. 3 in an end view from the front consists of four legs 31, 32, 33, 34 which enclose a central opening 38 corresponding to the hollow body 11 or 21 of the coil body 1, 2.
  • the metal foil frame 3 is interrupted by a slot 36 between the leg 34 and the leg 31, so that the metal foil frame 3 cannot form a self-contained short-circuit winding, which could lead to the undesirable formation of eddy currents.
  • the two adjacent end flanges 13 and 23 of the bobbins 1 and 2 are provided on their inner edges with circumferential, axially directed projections in the form of projections 14 and 14, which interlock with assembled bobbins 1, 2 and thereby the central opening 38 of the metal foil frame 3 in such a way that between the inner leg edges and the transformer core an insulation provided by the protrusions of the coil body, preferably molded from plastic, is ensured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Insulating Of Coils (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP84108616A 1983-08-04 1984-07-20 Petit transformateur Expired EP0133661B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84108616T ATE23234T1 (de) 1983-08-04 1984-07-20 Kleintransformator.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8322540U 1983-08-04
DE19838322540U DE8322540U1 (de) 1983-08-04 1983-08-04 Kleintransformator

Publications (3)

Publication Number Publication Date
EP0133661A2 true EP0133661A2 (fr) 1985-03-06
EP0133661A3 EP0133661A3 (en) 1985-04-03
EP0133661B1 EP0133661B1 (fr) 1986-10-29

Family

ID=6755855

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108616A Expired EP0133661B1 (fr) 1983-08-04 1984-07-20 Petit transformateur

Country Status (4)

Country Link
US (1) US4652846A (fr)
EP (1) EP0133661B1 (fr)
AT (1) ATE23234T1 (fr)
DE (2) DE8322540U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7218198B2 (en) 2002-10-01 2007-05-15 Det International Holding Limited Coil form

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6906609B1 (en) * 2000-04-07 2005-06-14 Astec International Limited Planar transformer
US6475168B1 (en) 2000-11-10 2002-11-05 Scimed Life Systems, Inc. Guide wire having x-ray transparent window for x-ray catheter
US6424696B1 (en) 2000-11-10 2002-07-23 Scimed Life Systems, Inc. X-ray catheter using a step-up transformer
US6546080B1 (en) * 2000-11-10 2003-04-08 Scimed Life Systems, Inc. Heat sink for miniature x-ray unit
US6540720B1 (en) 2000-11-10 2003-04-01 Scimed Life Systems, Inc. Miniature x-ray unit
US6551278B1 (en) 2000-11-10 2003-04-22 Scimed Life Systems, Inc. Miniature x-ray catheter with retractable needles or suction means for positioning at a desired site
US6540655B1 (en) 2000-11-10 2003-04-01 Scimed Life Systems, Inc. Miniature x-ray unit
US6509521B1 (en) 2000-11-10 2003-01-21 Scimed Life Systems, Inc. X-ray catheter with coaxial conductor
US6554757B1 (en) 2000-11-10 2003-04-29 Scimed Life Systems, Inc. Multi-source x-ray catheter
GB2377822A (en) * 2001-06-15 2003-01-22 Marconi Applied Technologies Transformer arrangement for delivering low voltage power to a high voltage device
CN104376993A (zh) * 2014-11-26 2015-02-25 广安鑫宇电子有限公司 一种变压器骨架

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2140497A (en) * 1937-06-07 1938-12-20 Formica Insulation Company Bobbin
DE1901827A1 (de) * 1968-01-22 1969-07-31 Westinghouse Electric Corp Induktives elektrisches Bauelement wie Transformator od.dgl.
DE2005939A1 (fr) * 1969-02-12 1970-09-03
US3605055A (en) * 1970-07-02 1971-09-14 Gen Electric Two-piece winding bobbin for watt-hour meter potential coil
FR2125263A1 (fr) * 1971-02-17 1972-09-29 Schutzapparate Paris & Co
US3842186A (en) * 1973-10-23 1974-10-15 Westinghouse Electric Corp Static plate for power transformers
US3851287A (en) * 1972-02-09 1974-11-26 Litton Systems Inc Low leakage current electrical isolation system
FR2389209A1 (fr) * 1977-04-29 1978-11-24 Orega Electro Mecanique Transformateur muni d'ecrans electrostatiques entre ses enroulements primaires et secondaires
FR2476898A1 (fr) * 1980-02-22 1981-08-28 Mini Informatiq System Ste Eur Bobinage electromagnetique comportant des elements discrets et dispositif d'alimentation electrique comportant de tels bobinages

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1893618A (en) * 1931-06-05 1933-01-10 Gen Motors Radio Corp Coupling device
US2714710A (en) * 1949-07-23 1955-08-02 Philco Corp Transformer
US3227973A (en) * 1962-01-31 1966-01-04 Reginald I Gray Transformer
US3277416A (en) * 1962-12-04 1966-10-04 Taylor Instrument Co Shielding arrangement for transformer
US3689862A (en) * 1971-01-20 1972-09-05 Precision Paper Tube Co Stackable coil form
US3843946A (en) * 1973-10-05 1974-10-22 Original Equipment Motors Inc Dual bobbin assembly for coils
US4000483A (en) * 1976-06-24 1976-12-28 The Singer Company Low voltage power transformer
US4250479A (en) * 1979-04-09 1981-02-10 Hewlett-Packard Company Transformer bobbin assembly

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2140497A (en) * 1937-06-07 1938-12-20 Formica Insulation Company Bobbin
DE1901827A1 (de) * 1968-01-22 1969-07-31 Westinghouse Electric Corp Induktives elektrisches Bauelement wie Transformator od.dgl.
DE2005939A1 (fr) * 1969-02-12 1970-09-03
US3605055A (en) * 1970-07-02 1971-09-14 Gen Electric Two-piece winding bobbin for watt-hour meter potential coil
FR2125263A1 (fr) * 1971-02-17 1972-09-29 Schutzapparate Paris & Co
US3851287A (en) * 1972-02-09 1974-11-26 Litton Systems Inc Low leakage current electrical isolation system
US3842186A (en) * 1973-10-23 1974-10-15 Westinghouse Electric Corp Static plate for power transformers
FR2389209A1 (fr) * 1977-04-29 1978-11-24 Orega Electro Mecanique Transformateur muni d'ecrans electrostatiques entre ses enroulements primaires et secondaires
FR2476898A1 (fr) * 1980-02-22 1981-08-28 Mini Informatiq System Ste Eur Bobinage electromagnetique comportant des elements discrets et dispositif d'alimentation electrique comportant de tels bobinages

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7218198B2 (en) 2002-10-01 2007-05-15 Det International Holding Limited Coil form
US7429908B2 (en) 2002-10-01 2008-09-30 Det International Holding Limited Coil form

Also Published As

Publication number Publication date
ATE23234T1 (de) 1986-11-15
DE3461128D1 (en) 1986-12-04
EP0133661B1 (fr) 1986-10-29
EP0133661A3 (en) 1985-04-03
DE8322540U1 (de) 1984-10-11
US4652846A (en) 1987-03-24

Similar Documents

Publication Publication Date Title
DE4241689C2 (de) Aufwärts- (Hochspannungs-)Transformator
DE19519594C2 (de) Transformator
EP0133661B1 (fr) Petit transformateur
EP0175069B1 (fr) Fabrication d'un élément inductif muni d'un noyau toroidal bobiné
DE3718383A1 (de) Hochfrequenz-leistungsuebertrager
DE19607714A1 (de) Transformator
DE2233005C3 (de) Spulenkörper-Baueinheit
DE3324078C2 (fr)
EP0335142A1 (fr) Transformateur pour réseau de commutation
EP0256583A1 (fr) Transformateur muni d'un écran magnétique
DE2244158B2 (de) Drossel oder Transformator, insbesondere als Vorschaltgerät für Gasentladungslampen
EP0047497A1 (fr) Transformateur
DE102004008961B4 (de) Spulenkörper für geschlossenen magnetischen Kern und daraus hergestellte Entstördrossel
DE3302192C2 (fr)
DE3636938C2 (fr)
DE2651734B2 (de) Spulenkörper
DE7821220U1 (de) Heiztransformator für einen Röntgengenerator
DE2258479C3 (de) Isoliereinrichtung für die Spule eines elektromagnetischen Flachrelais
DE4446716C1 (de) Isolieranordnung für magnetische Abschirmungen der Kesselwände von Transformatoren und Drosselspulen
DE19720334C2 (de) Zündspule für Zündanlagen von Brennkraftmaschinen
DE3215474A1 (de) Transformator, insbesondere mit einem oxydkeramischen kernschlussmaterial
DE3735683A1 (de) Wickelgut fuer transformatoren und dgl.
DE1616721B1 (de) Drosselspule fuer Leuchtstoffroehren
EP0654803A1 (fr) Transformateur électrique
DE7734497U1 (de) Spulenkoerper fuer einen netztransformator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT DE FR GB NL

AK Designated contracting states

Designated state(s): AT DE FR GB NL

17P Request for examination filed

Effective date: 19850426

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB NL

REF Corresponds to:

Ref document number: 23234

Country of ref document: AT

Date of ref document: 19861115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3461128

Country of ref document: DE

Date of ref document: 19861204

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19870731

Year of fee payment: 4

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19890720

Ref country code: AT

Effective date: 19890720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19900201

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19900330

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19900403

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST