EP0671749A1 - Flachspuletransformator - Google Patents

Flachspuletransformator Download PDF

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Publication number
EP0671749A1
EP0671749A1 EP95103110A EP95103110A EP0671749A1 EP 0671749 A1 EP0671749 A1 EP 0671749A1 EP 95103110 A EP95103110 A EP 95103110A EP 95103110 A EP95103110 A EP 95103110A EP 0671749 A1 EP0671749 A1 EP 0671749A1
Authority
EP
European Patent Office
Prior art keywords
wire turns
planar
transformer
winding transformer
planar winding
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
EP95103110A
Other languages
English (en)
French (fr)
Other versions
EP0671749B1 (de
Inventor
Alejandro De Hoz Garcia-Bellido
Salvador Ollero Velasco
Ramon Zamora Rubio
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.)
Power Supply Systems Holdings Nederlends Bv
Original Assignee
Alcatel NV
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 Alcatel NV filed Critical Alcatel NV
Publication of EP0671749A1 publication Critical patent/EP0671749A1/de
Application granted granted Critical
Publication of EP0671749B1 publication Critical patent/EP0671749B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01F27/2847—Sheets; Strips

Definitions

  • This invention concerns a planar transformer of particular application in low-profile, switched power supply units that can attain working frequencies up to several megahertz.
  • the transformers used are either of the traditional type, which have a high copper density and in which the problems resulting from winding non-repeatability are more obvious, or planar transformers, in which the wire turn repeatability problem has been overcome thanks to the perfect control of the wire turn shape in the manufacturing process, whereby there is no variation in parasitic effects.
  • planar winding transformer of the invention consisting of a core of ferromagnetic material and windings formed by flat wire turns, is characterised in that each wire turn is an open ring of conductive material, coated with insulating material to isolate it electrically from the other wire turns. Thanks to this form of construction, the wire turns are easily reproduced without deviations occurring with respect to the original design.
  • the open rings have at least two segments free of insulating material and they are joined together by a soldering process.
  • This process is characterised in that the open rings are joined together electrically inside the window of the magnetic core with no requirement for external means such as interconnecting pins that make it necessary to form the connection outside the magnetic core window; or machining pre-processes, such as drilling the turns.
  • This form of construction combines the advantages of the conventional transformers with those of planar transformers, like high conductive material density and winding repeatability, adding a simple method of interconnecting the wire turns within the transformer window and smaller size.
  • the end wire turns of the windings are characterised in that they have an extension which is used as a transformer terminal, facilitating its connection to other components of the power supply module.
  • the open rings are characterised in that they are circular when the core has a circular window, and to facilitate their assembly inside the core, they are characterised in that they have a notch at an angle that shifts progressively with respect to an origin, the opening of the rings of a winding forming a helix.
  • the planar winding transformer of the invention is formed by a core (N) of ferromagnetic material in the window (V) of which are lodged the wire turns of the windings (D) of the transformer, as can be seen in figure 1.
  • the wire turn is an open circular ring (E,C), as is shown in figure 2.
  • the rings are of a conductive material and are isolated from each other by means of a coating of insulating material. To connect the rings (E,C) electrically to each other, the insulating material at their ends is removed and the rings (E,C) are joined by a soldering process for each winding (D), in such a way that the join is made within the transformer window (V).
  • the soldering process takes place in an oven in which the rings (E,C) are placed mounted on a metallic piece or cylinder with the shape of the central part of the core (N) and which is equipped with a clamping mechanism. Once the rings have been positioned and placed under pressure on the device, the assembly is introduced into the oven for the wire turn soldering process to be carried out.
  • the task of situating the rings on the cylinder is facilitated if the latter has a projection equivalent to the notch (H) which each ring (E,C) has.
  • the notch (H) of each wire turn is shifted progressively by a determined angle from an origin whereby the openings of the rings (E,C) of each winding (D) form a helix, as can be seen from figure 3. Once the winding (D) has been formed, it is mounted inside the core.
  • a series of notches (H) can be practised, incremented by a determined angle starting from a given origin.
  • a core (N) is employed with an inside in the form of a polygon, the openings of the wire turns will also form a helix once the windings are constituted and mounted inside the core.
  • the end rings (E) of each winding (D) are different from the internal rings (C) of the winding (D).
  • the difference lies in that the end rings (E) have an extension (P) that facilitates the connection of the planar transformer to other elements in the power supply unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)
EP95103110A 1994-03-11 1995-03-04 Flachspuletransformator Expired - Lifetime EP0671749B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES09400514A ES2085235B1 (es) 1994-03-11 1994-03-11 Transformador de espiras planas.
ES9400514 1994-03-11

Publications (2)

Publication Number Publication Date
EP0671749A1 true EP0671749A1 (de) 1995-09-13
EP0671749B1 EP0671749B1 (de) 1998-05-13

Family

ID=8285528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95103110A Expired - Lifetime EP0671749B1 (de) 1994-03-11 1995-03-04 Flachspuletransformator

Country Status (4)

Country Link
EP (1) EP0671749B1 (de)
AT (1) ATE166179T1 (de)
DE (1) DE69502427T2 (de)
ES (1) ES2085235B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0820072A1 (de) * 1996-07-17 1998-01-21 MAGNETEK S.p.A. Flache magnetische Anordnung für elektronische Schaltungen
EP0953993A2 (de) * 1998-04-27 1999-11-03 Deutsche Thomson-Brandt Gmbh Spule
EP1722381A1 (de) * 2004-01-30 2006-11-15 TDK Corporation Spule und spulenkörper für eine spule

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2766854C1 (ru) * 2021-08-16 2022-03-16 Юрий Николаевич Шуваев Обмотка электромагнитного устройства

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3271716A (en) * 1962-05-28 1966-09-06 Advanced Kinetics Inc High-current pulse transformer
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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821806A (ja) * 1981-07-31 1983-02-08 Toko Inc 積層コイル

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3271716A (en) * 1962-05-28 1966-09-06 Advanced Kinetics Inc High-current pulse transformer
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 7, no. 99 (E - 172)<1244> 27 April 1983 (1983-04-27) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0820072A1 (de) * 1996-07-17 1998-01-21 MAGNETEK S.p.A. Flache magnetische Anordnung für elektronische Schaltungen
US5886610A (en) * 1996-07-17 1999-03-23 Canova; Antonio Ultra flat magnetic device for electronic circuits
EP0953993A2 (de) * 1998-04-27 1999-11-03 Deutsche Thomson-Brandt Gmbh Spule
EP0953993A3 (de) * 1998-04-27 2000-01-26 Deutsche Thomson-Brandt Gmbh Spule
US6154111A (en) * 1998-04-27 2000-11-28 Deutsche Thomson-Brandt Gmbh Storage coil
EP1722381A1 (de) * 2004-01-30 2006-11-15 TDK Corporation Spule und spulenkörper für eine spule
EP1722381A4 (de) * 2004-01-30 2008-11-19 Tdk Corp Spule und spulenkörper für eine spule

Also Published As

Publication number Publication date
ES2085235B1 (es) 1998-05-16
ES2085235A2 (es) 1996-05-16
ES2085235R (de) 1997-10-01
DE69502427D1 (de) 1998-06-18
DE69502427T2 (de) 1999-01-14
ATE166179T1 (de) 1998-05-15
EP0671749B1 (de) 1998-05-13

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