EP0584295B1 - Method for mounting an electrical coil on a magnetic circuit having an air gap - Google Patents
Method for mounting an electrical coil on a magnetic circuit having an air gap Download PDFInfo
- 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
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Classifications
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- 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)
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- 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
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- 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
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- 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
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- 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.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Measuring Magnetic Variables (AREA)
- Geophysics And Detection Of Objects (AREA)
- Coils Or Transformers For Communication (AREA)
- Electromagnets (AREA)
Abstract
Description
La présente invention concerne un procédé de montage d'une bobine électrique sur un circuit magnétique à entrefer, notamment sur le circuit d'un capteur de courant, ce circuit étant constitué par un empilage de tôles en un matériau magnétiquement perméable, ces tôles ayant toutes la forme générale du circuit magnétique et étant déplaçables dans leur plan les unes par rapport aux autres, procédé selon lequel on saisit cet empilage, on déforme au moins une partie du circuit proche de l'entrefer par rapport au plan des tôles, de façon à permettre la mise en place de la bobine sur une partie du circuit voisine de l'entrefer, et on ramène les parties déformées du circuit dans le plan des tôles après avoir placé la bobine sur le circuit.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.
Les présents capteurs de courant, dont le circuit magnétique présente un seul entrefer, nécessitent néanmoins un circuit magnétique formé de deux pièces séparées ou d'empilages de deux groupes de pièces de tôle pour permettre le montage d'une bobine sur une branche du circuit magnétique. Une telle structure, et le procédé de montage qui en découle, sont coûteux et rendent les installations de montage automatique relativement complexes.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.
L'invention vise à fournir un procédé de montage d'au moins une bobine sur un circuit magnétique à entrefer d'un capteur de courant, qui soit nettement plus simple et économique, notamment pour un montage automatisé dans une fabrication en série.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.
Le document US-A-1,401,493 concerne un procédé de montage d'une bobine d'induction sur un circuit magnétique à entrefer qui correspond à la description du procédé susmentionné. Toutefois, le circuit magnétique selon ce document comporte une branche centrale et deux branches latérales en forme de L séparées de la branche centrale par des entrefers respectifs, chacune de ces branches latérales étant déformées en deux parties pour permettre la mise en place d'une bobine cylindrique sur la branche centrale. Une telle structure ne permet pas de disposer deux parties de l'enroulement de part et d'autre de l'entrefer du circuit tel que cela est souhaitable dans un capteur de courant, par exemple en plaçant les deux parties de l'enroulement sur une branche d'une partie rectiligne du circuit et en les déplaçant finalement sur cette partie rectiligne pour les disposer de part et d'autre de l'entrefer.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. However, 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.
Le document JP-A-61-181 117 concerne un circuit magnétique moulé, fermé mais présentant une jonction oblique ouvrable dans le plan du circuit pour permettre l'introduction de plusieurs sections d'une bobine. Ces sections relativement plates sont introduites successivement, parallèlement au plan de la jonction, et ensuite réparties sur la longueur du circuit. La structure décrite dans ce document n'est pas assimilable à celle d'un capteur de courant et le procédé de montage proposé ne serait pas appliquable à un tel capteur.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.
Pour atteindre l'objectif susmentionné, le procédé selon l'invention est caractérisé en ce que l'on réalise l'enroulement de la bobine en deux parties et que l'on dispose ces deux parties de part et d'autre de l'entrefer du circuit magnétique.To achieve the above-mentioned objective, 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.
Des formes de mise en oeuvre préférentielles de ce procédé sont décrites dans les revendications 2 à 6.Preferred forms of implementation of this process are described in
L'invention concerne également un capteur de courant fabriqué en utilisant le procédé selon la revendication 1.The invention also relates to a current sensor manufactured using the method according to claim 1.
Un tel capteur peut avantageusement avoir un circuit magnétique qui comporte une branche de base rectiligne et deux branches rectilignes inclinées formant un angle aigu avec la branche de base, de premières extrémités des branches inclinées étant reliées à la branche de base, et de secondes extrémités des branches inclinées étant agencées pour former l'entrefer du circuit magnétique.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.
Des formes d'exécution particulières d'un tel capteur sont décrites dans les revendications 9 à 11.Particular embodiments of such a sensor are described in
Dans ce cas, on peut avantageusement placer sur le circuit deux bobines, à savoir une bobine sur chacune des branches inclinées, ceci sans augmenter la déformation du circuit magnétique pour placer la seconde bobine. D'autre part, on réalise, de cette façon, une structure présentant un rapport optimal entre la longueur du circuit et le volume de bobinage des bobines avec lesquelles le circuit est couplé. L'angle aigu est de préférence sensiblement égal à 45°. L'entrefer peut être orienté essentiellement perpendiculairement à la branche de base ou parallèlement à une des branches inclinées.In this case, it is advantageous to place two coils on the circuit, namely a coil on each of the inclined branches, without increasing the deformation of the magnetic circuit to place the second coil. On the other hand, a structure is produced in this way having an optimal ratio between the length of the circuit and the winding volume of the coils with which the circuit is coupled. The acute angle is preferably substantially equal to 45 °. The air gap can be oriented essentially perpendicular to the base branch or parallel to one of the inclined branches.
D'autres caractéristiques et avantages de l'invention ressortiront de la description suivante, de formes de réalisation préférentielles, indiquées à titre d'exemple et illustrées par le dessin annexé, dans lequel:
- La Fig. 1 montre un circuit magnétique avec une bobine montée selon l'invention;
- La Fig. 2 illustre le pliage partiel des tôles et la mise en place de la bobine dans le cas du circuit de la Fig. 1;
- La Fig. 3 montre une variante de la forme des tôles d'un circuit magnétique;
- Les Figures 4 et 5 montrent un circuit magnétique utilisant des tôles selon la Fig. 3 avec une bobine placée respectivement dans une position provisoire et dans sa position définitive, et
- la Fig. 6 montre une autre forme de circuit magnétique portant deux bobines montées selon l'invention.
- Fig. 1 shows a magnetic circuit with a coil mounted according to the invention;
- Fig. 2 illustrates the partial folding of the sheets and the positioning of the coil in the case of the circuit of FIG. 1;
- Fig. 3 shows a variant of the shape of the sheets of a magnetic circuit;
- Figures 4 and 5 show a magnetic circuit using sheets according to Fig. 3 with a coil placed respectively in a provisional position and in its final position, and
- Fig. 6 shows another form of magnetic circuit carrying two coils mounted according to the invention.
La Fig. 1 est une vue latérale d'un circuit magnétique 1 présentant un entrefer 2 et portant, sur une branche voisine de l'entrefer, une bobine 3 bobinée sur un corps de bobine 3a. Le circuit 1 est formé par un empilage de tôles planes, tel qu'il ressort de la vue de dessus de la Fig. 2. Les tôles individuelles ont toutes la forme du circuit représentée à la Fig. 1. Elles ne sont pas collées les unes sur les autres mais restent déplaçables entre elles le long de leurs surfaces de contact. Elles peuvent toutefois être maintenues ensemble par des rivets insérés dans les ouvertures 4 et 5 visibles à la Fig. 1. Après le montage de la bobine, ces tôles seront d'ailleurs également maintenues par le corps de bobine 3a.Fig. 1 is a side view of a magnetic circuit 1 having an
La Fig. 2 illustre un pliage, tel qu'il peut être effectué dans le présent procédé, pour déformer la branche supérieure destinée à porter la bobine, hors du plan des tôles réunies et maintenues en place dans leur partie inférieure. L'angle de pliage est fonction de la dimension transversale de la bobine, en l'occurrence du rayon ou de la demi-largeur des flasques du corps de bobine 3a, et de la moitié de l'épaisseur de l'empilage de tôles, de façon à permettre d'enfiler cette bobine sur la branche pliée du circuit. Après la mise en place de la bobine, on replie cette branche pour la ramener dans le plan des parties non déformées du circuit.Fig. 2 illustrates a folding, as it can be carried out in the present method, to deform the upper branch intended to carry the coil, out of the plane of the sheets joined together and held in place in their lower part. The folding angle is a function of the transverse dimension of the coil, in this case the radius or the half-width of the flanges of the
Les Fig. 3 à 5 montrent une autre forme d'un circuit essentiellement rectangulaire 6, selon laquelle l'entrefer est situé à l'intérieur d'un long côté du circuit. La Fig. 3 est une vue latérale de ce circuit, par ailleurs similaire à celui de la Fig. 1. La Fig. 4 montre ce circuit avec une bobine 7 placée sur une des branches 8 formant l'entrefer, cette bobine ayant par exemple été enfilée sur cette branche de façon similaire à celle illustrée par la Fig. 2. Alternativement, et de façon particulièrement avantageuse dans le cas d'un montage automatique, ce n'est pas la branche 8 portant la bobine, mais le reste du circuit qui peut être déformée hors du plan des tôles pour permettre le passage de la bobine sur la branche 8 maintenue droite dans ce cas. Les tôles peuvent être maintenues lors du pliage par un seul rivet 10, ou encore par un organe en forme de pince qui maintient les tôles en une zone 11, de façon à permettre une répartition de la déformation sur le reste du circuit. A cet égard, on remarquera la forme du circuit autour du renforcement pour le trou du rivet 10, qui réduit la rigidité du circuit à cet endroit par rapport à l'exemple de la Fig. 1.Figs. 3 to 5 show another form of an essentially
La Fig. 4 montre que la bobine 7 peut comporter un logement 22, pour un détecteur de champ magnétique qui sera disposé dans l'entrefer du circuit. Dans cette forme de réalisation, la bobine est déplacée sur le circuit, après que celui-ci a été remis en forme plane, de façon que ce logement soit placé à l'endroit de l'entrefer et que ce dernier se trouve donc à l'intérieur de la bobine, ce qui est avantageux pour les performances d'un capteur de courant utilisant ce circuit.Fig. 4 shows that the
Pour réaliser la déformation du circuit, on utilise, de préférence, un organe du type poussoir, dont l'action peut par exemple s'exercer en un endroit 12 sur le paquet de tôles, et ceci de telle façon que les tôles individuelles puissent se déplacer les unes par rapport aux autres pendant la déformation. Selon l'application de la force de déformation et la ou les parties maintenues fixes, la déformation aura le caractère d'un pliage ou d'une déformation plus complexe, impliquant une torsion d'au moins une branche du circuit.To carry out 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
Selon une forme de mise en oeuvre du présent procédé, le poussoir peut comprendre une partie solidaire de la bobine, au moins pendant l'action de déformation ou de pliage, de manière à utiliser le mouvement de la bobine l'amenant face à l'extrémité de la branche 8, pour écarter l'extrémité de la branche 9.According to one embodiment of the present method, 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
La Fig. 6 montre un circuit magnétique 13 qui comporte une branche rectiligne de base 14 et deux branches rectilignes 15, 16 inclinées par rapport à cette branche de base. Une des extrémités de chacune des branches 15, 16 est reliée à la branche de base par l'intermédiaire de parties telles que 17, 18, les autres extrémités, libres, formant un entrefer 19. Des bobines 20, 21 sont disposées sur les branches respectives 15, 16, ces bobines étant représentées schématiquement pour illustrer leur encombrement par rapport au circuit 14. Il ressort de cette représentation que les valeurs maximales de la longueur et de la dimension transversale de ces bobines qui permettent la mise en place de celles-ci par un écartement des extrémités libres des branches 15, 16, perpendiculairement au plan des tôles, dépendent l'une de l'autre. On peut également déduire de cette représentation qu'un angle d'inclinaison des branches 15, 16 par rapport à la branche 14, de 45°, constitue un optimum dans la recherche du plus grand volume de bobinage pour la plus courte longueur du circuit magnétique. La structure de principe de la Fig. 6 est également très avantageuse du point de vue de la déformation produite lors de la mise en place des bobines, cette déformation conduisant à des contraintes relativement faibles dans les tôles.Fig. 6 shows a
L'entrefer peut être placé selon la Fig. 6, perpendiculairement à la branche 14, ou peut être formé entre la face frontale de l'une des branches inclinées et le côté latéral de l'autre, de manière à être orienté parallèlement à cette dernière branche.The air gap can be placed according to FIG. 6, perpendicular to the
Le présent procédé est applicable plus particulièrement à la fabrication de capteurs de courant du type décrit dans le brevet suisse No. 677 034.The present method is more particularly applicable to the manufacture of current sensors of the type described in Swiss patent No. 677 034.
Claims (11)
- A method for mounting at least one electric coil (7) on a magnetic circuit (6) with an air-gap of a current sensor, this circuit being formed by a stack of metal sheets of a material which is magnetically permeable, these metal sheets having all the general shape of the magnetic circuit and being capable of sliding each one relatively to the others in their plane, method in which this stack is held firmly, at least one portion (8) of the circuit close to the air-gap is deformed relatively to the plane of the metal sheets, in such a manner as to allow the placement of the coil on a portion (8) of the circuit close to the air-gap, and the deformed parts of the circuit are brought back into the plane of the metal sheets after the placement of the coil (7) on the circuit, characterized in that the winding of the coil (7) is made in two parts, these two parts being placed one on each side of the air-gap of the magnetic circuit.
- A method according to claim 1, applied to a magnetic circuit (6) having an air-gap between two branches of a rectilinear part of the circuit, characterized in that the two parts of the winding are first placed on one (8) of the said two branches and in that the two windings are moved after the deformed parts of the circuit have been brought back into the plane of the metal sheets, so as to position them one on each side of the air-gap.
- A method according to claim 1, characterized in that at least one portion of the circuit (6) at the opposite side of the air-gap is clamped during said deformation.
- A method according to claim 3, characterized in that the clamping and the deformation of the circuit (6) are carried out in such a manner that the deformation of the metal sheets is spread over the major part of the circuit which is not clamped.
- A method according to claim 1, characterized in that the metal sheets are deformed and then brought back into their plane by means of at least one pusher.
- A method according to claim 5, characterized in that the pusher includes one part which is at least temporarily fixed to said coil.
- A current sensor made by using the method according to claim 1.
- A sensor according to claim 7, characterized in that its magnetic circuit (13) includes a rectilinear base branch (14) and two rectilinear inclined branches (15, 16) forming an acute angle with the base branch, the first ends of the inclined branches being connected (through 17, 18) to the base branch and the second ends of the inclined branches being arranged to form the air-gap (19) of the magnetic circuit.
- A sensor according to claim 8, characterized in that the acute angle is substantially equal to 45°.
- A sensor according to claim 8 or claim 9, characterized in that the air-gap (19) is substantially perpendicular to the base branch (14).
- A sensor according to claim 8 or claim 9, characterized in that the air-gap is substantially parallel to one of the inclined branches.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH16392A CH685892A5 (en) | 1992-01-21 | 1992-01-21 | A method of mounting an electrical coil on a magnetic circuit with air gap |
| CH163/92 | 1992-01-21 | ||
| PCT/CH1993/000010 WO1993014509A1 (en) | 1992-01-21 | 1993-01-20 | Method for mounting an electrical coil on a magnetic circuit having an air gap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0584295A1 EP0584295A1 (en) | 1994-03-02 |
| EP0584295B1 true EP0584295B1 (en) | 1997-10-22 |
Family
ID=4180697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93901617A Expired - Lifetime EP0584295B1 (en) | 1992-01-21 | 1993-01-20 | Method for mounting an electrical coil on a magnetic circuit having an air gap |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US5457873A (en) |
| EP (1) | EP0584295B1 (en) |
| JP (1) | JP3118257B2 (en) |
| CH (1) | CH685892A5 (en) |
| DE (1) | DE69314729T2 (en) |
| WO (1) | WO1993014509A1 (en) |
Cited By (3)
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2888142B2 (en) | 1993-11-08 | 1999-05-10 | 三菱電機株式会社 | Rotary motor and method of manufacturing the same |
| CH685892A5 (en) * | 1992-01-21 | 1995-10-31 | Lem S.A. | A method of mounting an electrical coil on a magnetic circuit with air gap |
| 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 |
| US6335673B1 (en) * | 1995-12-14 | 2002-01-01 | Schneider Electric Sa | Current transformer and its manufacturing process |
| FR2742573B1 (en) * | 1995-12-14 | 1998-02-06 | Schneider Electric Sa | CURRENT TRANSFORMER AND MANUFACTURING METHOD THEREOF |
| EP1058278B1 (en) | 1999-06-04 | 2012-02-29 | Liaisons Electroniques-Mecaniques Lem S.A. | Wound magnetic circuit |
| JP2001126939A (en) * | 1999-10-29 | 2001-05-11 | Yazaki Corp | Electromagnetic induction connector |
| ES2241812T3 (en) * | 2000-04-19 | 2005-11-01 | Wellington Drive Technologies Limited | METHOD FOR PRODUCING STATOR WINDS. |
| US20050001709A1 (en) * | 2003-07-03 | 2005-01-06 | Pais Martin R. | Inductive device and methods for assembling same |
| JP4815259B2 (en) * | 2006-04-20 | 2011-11-16 | 株式会社マキタ | Manufacturing method of motor |
| SE530753C2 (en) * | 2007-02-20 | 2008-09-02 | Hexaformer Ab | Reactor and method of making one |
| US8686723B2 (en) | 2010-03-22 | 2014-04-01 | Schlumberger Technology Corporation | Determining the larmor frequency for NMR tools |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1401493A (en) * | 1919-06-13 | 1921-12-27 | Remy Electric Co | Induction-coil |
| FR734767A (en) * | 1931-03-13 | 1932-10-28 | Delle Atel Const Electr | Toroid-type current transformer with limited secondary current during a primary overcurrent |
| US2592652A (en) * | 1950-02-18 | 1952-04-15 | Bell Telephone Labor Inc | Magnetic transducer head |
| US3034203A (en) * | 1953-04-23 | 1962-05-15 | Gen Electric | Method of making magnetic cores |
| US3201731A (en) * | 1962-11-27 | 1965-08-17 | Electro Netic Steel Inc | Transformer core and lamination therefor |
| US4267619A (en) * | 1972-01-26 | 1981-05-19 | The Stanley Works | Controlled release door holder |
| US4267719A (en) * | 1977-09-19 | 1981-05-19 | Industra Products, Inc. | Apparatus for assembling dynamoelectric machine stators |
| GB8403996D0 (en) * | 1984-02-15 | 1984-03-21 | Crest Energyscan Ltd | Current measuring device |
| US4790064A (en) * | 1985-12-04 | 1988-12-13 | General Electric Company | Method of manufacturing an amorphous metal transformer core and coil assembly |
| CH669852A5 (en) * | 1986-12-12 | 1989-04-14 | Lem Liaisons Electron Mec | |
| CH677034A5 (en) * | 1987-12-07 | 1991-03-28 | Lem Liaisons Electron Mec | High current measuring sensor - includes magnetic field detector in air gap of magnetic circuit surrounding current carrying cable |
| CH685892A5 (en) * | 1992-01-21 | 1995-10-31 | Lem S.A. | A method of mounting an electrical coil on a magnetic circuit with air gap |
-
1992
- 1992-01-21 CH CH16392A patent/CH685892A5/en not_active IP Right Cessation
-
1993
- 1993-01-20 US US08/119,089 patent/US5457873A/en not_active Expired - Lifetime
- 1993-01-20 JP JP05512050A patent/JP3118257B2/en not_active Expired - Lifetime
- 1993-01-20 WO PCT/CH1993/000010 patent/WO1993014509A1/en active IP Right Grant
- 1993-01-20 EP EP93901617A patent/EP0584295B1/en not_active Expired - Lifetime
- 1993-01-20 DE DE69314729T patent/DE69314729T2/en not_active Expired - Lifetime
-
1995
- 1995-10-04 US US08/539,225 patent/US6052048A/en not_active Expired - Lifetime
Cited By (3)
| 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 |
|---|---|
| US5457873A (en) | 1995-10-17 |
| DE69314729T2 (en) | 1998-06-04 |
| DE69314729D1 (en) | 1997-11-27 |
| CH685892A5 (en) | 1995-10-31 |
| WO1993014509A1 (en) | 1993-07-22 |
| US6052048A (en) | 2000-04-18 |
| JP3118257B2 (en) | 2000-12-18 |
| JPH06506565A (en) | 1994-07-21 |
| EP0584295A1 (en) | 1994-03-02 |
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