EP0584295B1 - Verfahren zum montieren einer elektrischen spule auf einem magnetkreis mit luftspalt - Google Patents

Verfahren zum montieren einer elektrischen spule auf einem magnetkreis mit luftspalt Download PDF

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Publication number
EP0584295B1
EP0584295B1 EP93901617A EP93901617A EP0584295B1 EP 0584295 B1 EP0584295 B1 EP 0584295B1 EP 93901617 A EP93901617 A EP 93901617A EP 93901617 A EP93901617 A EP 93901617A EP 0584295 B1 EP0584295 B1 EP 0584295B1
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EP
European Patent Office
Prior art keywords
circuit
gap
coil
air
magnetic circuit
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 - Lifetime
Application number
EP93901617A
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English (en)
French (fr)
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EP0584295A1 (de
Inventor
Pierre Cattaneo
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.)
Liaisons Electroniques Mecaniques LEM SA
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Liaisons Electroniques Mecaniques LEM SA
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Classifications

    • 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)
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
    • Y10T29/49078—Laminated

Definitions

  • the present invention relates to a method of mounting an electric coil on a magnetic circuit to be gap, in particular on the circuit of a current sensor, this circuit being constituted by a stack of sheets made of a magnetically permeable material, these sheets all having the general shape of the magnetic circuit and being movable in their plane relative to each other, method according to which this stack is grasped, at least part of the circuit near the air gap is deformed relative to the plane of the sheets, so as to allow the coil to be placed on a part of the circuit close to the air gap, and the deformed parts of the circuit are brought back into the plane of the sheets after placing the coil on the circuit.
  • the present current sensors the magnetic circuit of which has a single air gap, nevertheless require a magnetic circuit formed by two separate parts or by stacks of two groups of sheet metal parts to allow the mounting of a coil on a branch of the magnetic circuit. .
  • Such a structure, and the mounting method which results therefrom, are expensive and make automatic mounting installations relatively complex.
  • the invention aims to provide a method of mounting at least one coil on a magnetic circuit with an air gap of a current sensor, which is much simpler and economical, in particular for automated mounting in mass production.
  • Document US-A-1,401,493 relates to a method of mounting an induction coil on a magnetic circuit with an air gap which corresponds to the description of the above-mentioned method.
  • the magnetic circuit according to this document comprises a central branch and two L-shaped lateral branches separated from the central branch by respective air gaps, each of these lateral branches being deformed into two parts to allow the establishment of a coil. cylindrical on the central branch.
  • Such a structure does not allow two parts of the winding on either side of the air gap of the circuit as is desirable in a current sensor, for example by placing the two parts of the winding on a branch of a straight part of the circuit and by finally moving on this rectilinear part to arrange them on either side of the air gap.
  • Document JP-A-61-181 117 relates to a molded magnetic circuit, closed but having an opening oblique junction in the plane of the circuit to allow the introduction of several sections of a coil. These relatively flat sections are introduced successively, parallel to the plane of the junction, and then distributed over the length of the circuit.
  • the structure described in this document cannot be assimilated to that of a current sensor and the proposed mounting method would not be applicable to such a sensor.
  • the method according to the invention is characterized in that the coil is wound in two parts and that these two parts are placed on either side of the air gap of the magnetic circuit.
  • the invention also relates to a current sensor manufactured using the method according to claim 1.
  • Such a sensor can advantageously have a magnetic circuit which comprises a rectilinear base branch and two inclined rectilinear branches forming an acute angle with the base branch, first ends of the inclined branches being connected to the base branch, and second ends of the inclined branches being arranged to form the air gap of the magnetic circuit.
  • Fig. 1 is a side view of a magnetic circuit 1 having an air gap 2 and carrying, on a branch close to the air gap, a coil 3 wound on a coil body 3a.
  • Circuit 1 is formed by a stack of flat sheets, as shown in the top view of FIG. 2. The individual sheets all have the shape of the circuit shown in FIG. 1. They are not glued to each other but remain movable between them along their contact surfaces. They can however be held together by rivets inserted in the openings 4 and 5 visible in FIG. 1. After mounting the coil, these sheets will also be held by the coil body 3a.
  • Figs. 3 to 5 show another form of an essentially rectangular circuit 6, according to which the air gap is located inside a long side of the circuit.
  • Fig. 3 is a side view of this circuit, moreover similar to that of FIG. 1.
  • Fig. 4 shows this circuit with a coil 7 placed on one of the branches 8 forming the air gap, this coil having for example been threaded on this branch in a similar manner to that illustrated in FIG. 2.
  • it is not the branch 8 carrying the coil, but the rest of the circuit which can be deformed outside the plane of the sheets to allow the passage of the coil on branch 8 kept straight in this case.
  • the sheets can be held during folding by a single rivet 10, or even by a clamp-shaped member which holds the sheets in a zone 11, so as to allow a distribution of the deformation over the rest of the circuit.
  • a single rivet 10 or even by a clamp-shaped member which holds the sheets in a zone 11, so as to allow a distribution of the deformation over the rest of the circuit.
  • the shape of the circuit around the reinforcement for the rivet hole 10 which reduces the rigidity of the circuit at this location compared to the example in FIG. 1.
  • Fig. 4 shows that the coil 7 can include a housing 22 for a magnetic field detector which will be placed in the air gap of the circuit.
  • the coil is moved on the circuit, after the latter has been returned to planar shape, so that this housing is placed at the location of the air gap and that the latter is therefore at inside the coil, which is advantageous for the performance of a current sensor using this circuit.
  • the deformation of the circuit use is preferably made of a device of the push-button type, the action of which can for example be exerted in a place 12 on the sheet pack, and this in such a way that the individual sheets can move relative to one another during the deformation.
  • the deformation will have the character of a more complex folding or deformation, implying a twist of at least one branch of the circuit.
  • the pusher may comprise an integral part of the spool, at least during the deformation or folding action, so as to use the movement of the spool bringing it facing the end of branch 8, to spread the end of branch 9.
  • Fig. 6 shows a magnetic circuit 13 which comprises a straight base branch 14 and two straight branches 15, 16 inclined with respect to this base branch.
  • One of the ends of each of the branches 15, 16 is connected to the base branch by means of parts such as 17, 18, the other ends, free, forming an air gap 19.
  • Coils 20, 21 are arranged on the branches respective 15, 16, these coils being shown schematically to illustrate their size relative to the circuit 14. It appears from this representation that the maximum values of the length and of the transverse dimension of these coils which allow the positioning thereof by a spacing of the free ends of the branches 15, 16, perpendicular to the plane of the sheets, depend on one another.
  • the air gap can be placed according to FIG. 6, perpendicular to the branch 14, or can be formed between the front face of one of the inclined branches and the lateral side of the other, so as to be oriented parallel to the latter branch.
  • the present method is more particularly applicable to the manufacture of current sensors of the type described in Swiss patent No. 677 034.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Measuring Magnetic Variables (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Electromagnets (AREA)
  • Coils Or Transformers For Communication (AREA)

Claims (11)

  1. Verfahren zum Aufbringen mindestens einer elektrischen Spule (7) auf einen magnetischen Kreis (6) mit Luftspalt eines Stromsensors, wobei dieser Kreis durch einen Stapel von Blechen aus magnetisch permeablem Material besteht, welche Bleche alle die allgemeine Form des magnetischen Kreises haben und in ihrer Ebene gegeneinander verschiebbar sind, Verfahren wonach dieser Stapel festgehalten wird, mindestens ein in der Nähe des Luftspalts gelegener Teil des Kreises (8) gegenüber der Ebene der Bleche verformt wird, so dass die Spule auf einem dem Luftspalt benachbarten Teil des Kreises (8) angebracht werden kann, und wonach die verformten Teile des Kreises in die Ebene der Bleche zurückgebracht werden, nachdem die Spule (7) auf dem Kreis untergebracht wurde, dadurch gekennzeichnet, dass die Wicklung der Spule (7) in zwei Teilen hergestellt wird und dass diese zwei Teile zu beiden Seiten des Luftspalts des magnetischen Kreises angeordnet werden.
  2. Verfahren nach Patentanspruch 1, angewandt auf einen magnetischen Kreis (6), der einen Luftspalt zwischen zwei Zweigen eines geradlinigen Teils des Kreises aufweist, dadurch gekennzeichnet, dass die zwei Teile der Wicklung zuerst auf einen (8) der genannten Zweige aufgebracht werden und dass die zwei Wicklungen, nachdem die verformten Teile des Kreises in die Ebene der Bleche zurückgebracht wurden, verschoben werden, um sie zu beiden Seiten des Luftspalts anzuordnen.
  3. Verfahren nach Patentanspruch 1, dadurch gekennzeichnet, dass während der genannten Verformung mindestens ein Teil des Kreises (6), der dem Luftspalt gegenüberliegt, festgehalten wird.
  4. Verfahren nach Patentanspruch 3, dadurch gekennzeichnet, dass das Festhalten und die Verformung des Kreises (6) so durchgeführt werden, dass die Verformung der Bleche über den grössten, nicht festgehaltenen Teil des Kreises verteilt wird.
  5. Verfahren nach Patentanspruch 1, dadurch gekennzeichnet, dass die Bleche durch mindestens ein Druckorgan verformt und dann in ihre Ebene zurückgebracht werden.
  6. Verfahren nach Patentanspruch 5, dadurch gekennzeichnet, dass das Druckorgan ein Teil aufweist, das mindestens zeitweise mit der genannten Spule fest verbunden ist.
  7. Stromsensor, hergestellt unter Verwendung des Verfahrens gemäss Patentanspruch 1.
  8. Stromsensor nach Patentanspruch 7, dadurch gekennzeichnet, dass sein magnetischer Kreis (13) einen geradlinigen Basiszweig (14) und zwei geradlinige geneigte Zweige (15, 16) aufweist, welche einen spitzen Winkel mit dem Basiszweig bilden, wobei erste Enden der geneigten Zweige mit dem Basiszweig verbunden sind (durch 17, 18) und die zweiten Enden der geneigten Zweige zur Bildung des Luftspalts (19) des magnetischen Kreises ausgebildet sind.
  9. Stromsensor nach Patentanspruch 8, dadurch gekennzeichnet, dass der spitze Winkel etwa gleich 45° ist.
  10. Stromsensor nach Patentanspruch 8 oder Patentanspruch 9, dadurch gekennzeichnet, dass der Luftspalt (19) im wesentlichen senkrecht zum Basiszweig (14) verläuft.
  11. Stromsensor nach Patentanspruch 8 oder Patentanspruch 9, dadurch gekennzeichnet, dass der Luftspalt im wesentlichen parallel zu einem der geneigten Zweige verläuft.
EP93901617A 1992-01-21 1993-01-20 Verfahren zum montieren einer elektrischen spule auf einem magnetkreis mit luftspalt Expired - Lifetime EP0584295B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH163/92 1992-01-21
CH16392A CH685892A5 (fr) 1992-01-21 1992-01-21 Procédé de montage d'une bobine électrique sur un circuit magnétique à entrefer
PCT/CH1993/000010 WO1993014509A1 (fr) 1992-01-21 1993-01-20 Procede de montage d'une bobine electrique sur un circuit magnetique a entrefer

Publications (2)

Publication Number Publication Date
EP0584295A1 EP0584295A1 (de) 1994-03-02
EP0584295B1 true EP0584295B1 (de) 1997-10-22

Family

ID=4180697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93901617A Expired - Lifetime EP0584295B1 (de) 1992-01-21 1993-01-20 Verfahren zum montieren einer elektrischen spule auf einem magnetkreis mit luftspalt

Country Status (6)

Country Link
US (2) US5457873A (de)
EP (1) EP0584295B1 (de)
JP (1) JP3118257B2 (de)
CH (1) CH685892A5 (de)
DE (1) DE69314729T2 (de)
WO (1) WO1993014509A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7332903B2 (en) 2005-08-25 2008-02-19 Lisa Dräxlmaier GmbH Device and method for measuring a current flowing in an electrical conductor
US7541799B2 (en) 2005-05-25 2009-06-02 Lisa Dräxlmaier GmbH Method and device for measuring a current flowing in an electrical conductor
US7923986B2 (en) 2006-07-14 2011-04-12 Lisa Draexlmaier Gmbh Device and method for measuring a current flowing in an electrical conductor

Families Citing this family (13)

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Publication number Priority date Publication date Assignee Title
JP2888142B2 (ja) 1993-11-08 1999-05-10 三菱電機株式会社 回転電動機並びにその製造方法
CH685892A5 (fr) * 1992-01-21 1995-10-31 Lem S.A. Procédé de montage d'une bobine électrique sur un circuit magnétique à entrefer
US6121711A (en) 1993-11-08 2000-09-19 Mitsubishi Denki Kabushiki Kaisha Rotary motor and production method thereof, and laminated core and production method thereof
US5610906A (en) * 1994-06-29 1997-03-11 Interdigital Technology Corporation Spread-spectrum changeable base station
FR2742573B1 (fr) * 1995-12-14 1998-02-06 Schneider Electric Sa Transformateur de courant et son procede de fabrication
US6335673B1 (en) 1995-12-14 2002-01-01 Schneider Electric Sa Current transformer and its manufacturing process
EP1058278B1 (de) 1999-06-04 2012-02-29 Liaisons Electroniques-Mecaniques Lem S.A. Gewickelter Magnetkreis
JP2001126939A (ja) * 1999-10-29 2001-05-11 Yazaki Corp 電磁誘導コネクタ
WO2001080399A1 (en) * 2000-04-19 2001-10-25 Wellington Drive Technologies Limited Method of producing stator windings
US20050001709A1 (en) * 2003-07-03 2005-01-06 Pais Martin R. Inductive device and methods for assembling same
JP4815259B2 (ja) * 2006-04-20 2011-11-16 株式会社マキタ モータの製造方法
SE530753C2 (sv) * 2007-02-20 2008-09-02 Hexaformer Ab Reaktor samt förfarande för tillverkning av en sådan
US8686723B2 (en) 2010-03-22 2014-04-01 Schlumberger Technology Corporation Determining the larmor frequency for NMR tools

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CH685892A5 (fr) * 1992-01-21 1995-10-31 Lem S.A. Procédé de montage d'une bobine électrique sur un circuit magnétique à entrefer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7541799B2 (en) 2005-05-25 2009-06-02 Lisa Dräxlmaier GmbH Method and device for measuring a current flowing in an electrical conductor
US7332903B2 (en) 2005-08-25 2008-02-19 Lisa Dräxlmaier GmbH Device and method for measuring a current flowing in an electrical conductor
US7923986B2 (en) 2006-07-14 2011-04-12 Lisa Draexlmaier Gmbh Device and method for measuring a current flowing in an electrical conductor

Also Published As

Publication number Publication date
US6052048A (en) 2000-04-18
JP3118257B2 (ja) 2000-12-18
DE69314729T2 (de) 1998-06-04
JPH06506565A (ja) 1994-07-21
CH685892A5 (fr) 1995-10-31
DE69314729D1 (de) 1997-11-27
WO1993014509A1 (fr) 1993-07-22
US5457873A (en) 1995-10-17
EP0584295A1 (de) 1994-03-02

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