EP0059117B1 - Procédé et machine de fabrication d'un circuit magnétique enroulé - Google Patents

Procédé et machine de fabrication d'un circuit magnétique enroulé Download PDF

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Publication number
EP0059117B1
EP0059117B1 EP19820400130 EP82400130A EP0059117B1 EP 0059117 B1 EP0059117 B1 EP 0059117B1 EP 19820400130 EP19820400130 EP 19820400130 EP 82400130 A EP82400130 A EP 82400130A EP 0059117 B1 EP0059117 B1 EP 0059117B1
Authority
EP
European Patent Office
Prior art keywords
winding
tongue
strip
aperture
turn
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.)
Expired
Application number
EP19820400130
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0059117A1 (fr
Inventor
Pierre Bredel
Jean-Luc Prieto
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0059117A1 publication Critical patent/EP0059117A1/fr
Application granted granted Critical
Publication of EP0059117B1 publication Critical patent/EP0059117B1/fr
Expired 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
    • H01F27/24—Magnetic cores
    • H01F27/25—Magnetic cores made from strips or ribbons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)

Definitions

  • the invention relates to a method for manufacturing a toroidal magnetic circuit, in particular for a differentiating transformer, in which a strip of magnetic sheet is wound in spirals, the part of the strip forming the last external turn of the winding. , being punched before winding to produce at the start of said part a fixing tab and at the end an orifice through which the strap is folded down after winding of said part.
  • the object of the present invention is to carry out a fully automatic process using standard machines.
  • Document US-A-4,024,486 describes a hoop for holding a stack forming a magnetic core.
  • the hoop has at one of its ends a tongue and at the other of the orifices. After placing the hoop around the core, the tongue is folded through one of the holes to lock the hoop. The operation is performed manually.
  • Punching reveals at the start of the last turn a tongue, which comes after winding opposite and engages in the punched hole at the end of the last turn.
  • the flap of the tongue is produced by the abutment of the tongue on a member displaced on the rotation path of the winding.
  • the invention extends to a machine for automatically making the torus.
  • This machine comprises in the usual manner a winding mandrel and a punching device for cutting the strip, and according to the invention, the punching device comprises three punches, which simultaneously perform the cutting of the strip and the punching of the tongue. and the orifice.
  • the spacing of the punches of the tongue and of the orifice corresponds substantially to the developed length of the last turn and this spacing is advantageously adjustable for the winding of toroids of different diameters.
  • a magnetic toroid 10 is produced by spiral winding of a strip or ribbon 12 of magnetic sheet around a mandrel (not shown) of a winding machine. Upstream of the winding mandrel, seen in the direction of travel of the ribbon, is disposed a punching machine of which only the three punches 14, 16, 20 are schematically represented in FIG. 2. The punching machine is coupled or incorporated into the winding machine and their operation is synchronized so as to actuate the punching machine after winding a predetermined number of turns.
  • a first punch 14 is moved from top to bottom to cut the ribbon 12 to the trequise length at the end of the winding operation.
  • a second punch 16 slightly shifted to the right in FIG. 2 in the direction of travel of the ribbon 12 indicated by the arrow, accompanies the punch 14 in its race to pierce on the axis of the ribbon 12 near the cut end 17, a rectangular orifice 18.
  • a third punch 20 acting from bottom up is shifted to the right of fig. 2 by a distance corresponding to the development of the last turn of the winding of the torus 10.
  • the punch 20 forms in the axis of the ribbon 12 tongue 22, projecting upwards and oriented in the direction of travel of the ribbon 12
  • the three punches 14, 16, 20 are moved into the active position simultaneously, but it is clear that they are in the active position simultaneously, but it is clear that they can act successively, their relative position being modified accordingly.
  • the orifice 18 fits on the projecting tongue 22, which is folded by abutment against a tool 24 displaced on the rotation path of the torus 10.
  • the width and the the length of the orifice 18 is slightly greater than that of the tongue 22 to allow easy passage of the tongue 22.
  • the length of the tongue 22 is sufficient to compensate for small variations in the dimensions of the torus 10, the folded part being more or less shorter, but sufficient to engage the edge of the sheet.
  • the stapling may include several tabs, in particular in the case of toruses of large length and that the method is applicable to any type of torus.
  • the invention naturally extends to any variant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Coils Or Transformers For Communication (AREA)
EP19820400130 1981-02-13 1982-01-25 Procédé et machine de fabrication d'un circuit magnétique enroulé Expired EP0059117B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8103040A FR2500231A1 (fr) 1981-02-13 1981-02-13 Procede et machine de fabrication d'un circuit magnetique enroule et circuit magnetique realise selon ce procede
FR8103040 1981-02-13

Publications (2)

Publication Number Publication Date
EP0059117A1 EP0059117A1 (fr) 1982-09-01
EP0059117B1 true EP0059117B1 (fr) 1985-12-18

Family

ID=9255268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820400130 Expired EP0059117B1 (fr) 1981-02-13 1982-01-25 Procédé et machine de fabrication d'un circuit magnétique enroulé

Country Status (3)

Country Link
EP (1) EP0059117B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3267957D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2500231A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3627887A1 (de) * 1986-08-16 1988-02-18 Philips Patentverwaltung Transformator mit einer magnetischen abschirmung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR583251A (fr) * 1924-07-02 1925-01-09 Cfcmug Dispositif de noyau magnétique pour transformateurs en forme de tore
US2148449A (en) * 1937-08-20 1939-02-28 Edwards And Company Inc Transformer construction
US2972724A (en) * 1959-10-19 1961-02-21 Ferranti Packard Ltd Locked wound core
US4024486A (en) * 1975-07-14 1977-05-17 General Electric Company Outer locking turn for precut core

Also Published As

Publication number Publication date
DE3267957D1 (en) 1986-01-30
EP0059117A1 (fr) 1982-09-01
FR2500231B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1984-04-20
FR2500231A1 (fr) 1982-08-20

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