EP2887363B1 - Method for winding a conductor in a double pancake - Google Patents

Method for winding a conductor in a double pancake Download PDF

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Publication number
EP2887363B1
EP2887363B1 EP14196986.5A EP14196986A EP2887363B1 EP 2887363 B1 EP2887363 B1 EP 2887363B1 EP 14196986 A EP14196986 A EP 14196986A EP 2887363 B1 EP2887363 B1 EP 2887363B1
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EP
European Patent Office
Prior art keywords
conductor
winding
tensioner
pancake
during
Prior art date
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EP14196986.5A
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German (de)
French (fr)
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EP2887363A1 (en
Inventor
Raphaël Pasquet
Thierry Schild
Christophe Berriaud
Loris Scola
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique CEA
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • 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
    • H01F27/2871—Pancake coils
    • 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
    • H01F41/04—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 for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/082—Devices for guiding or positioning the winding material on the former
    • H01F41/084—Devices for guiding or positioning the winding material on the former for forming pancake coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
    • 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
    • Y10T29/49014—Superconductor

Definitions

  • the invention relates to the winding of a conductor, in particular a superconductor, for an electromagnet.
  • Critical values are specific to each material. These three parameters, Tc, Bc and Jc, are interdependent, forming a critical surface. If the material is below the critical surface, it is superconducting, otherwise it is resistive.
  • NbTi niobium titanium
  • MRI Magnetic Resonance Imaging
  • NMR Nuclear Magnetic Resonance
  • Niobium 3 tin (Nb 3 Sn) is a material also used for very high field NMR spectrometers, greater than 10 Tesla.
  • Magnesium diboride (MgB 2 ), mixed oxide of bismuth, strontium, copper and calcium (BiSCCO) and mixed oxide of barium, copper and yttrium (YBaCuO) are also superconducting materials used for the manufacture of electromagnets but they are currently confined to research and development.
  • MgB 2 has the advantage of having a low cost, being quite easy to use and more efficient than NbTi at equivalent temperature, for a magnetic field of less than 4T, the vast majority of MRIs operating for a magnetic field between 1.5T and 3T.
  • the increase in the operating temperature would make it possible to go from a so-called wet cooling by bath of liquid helium to 4.2K to a so-called dry cooling by conduction between 10 and 20K.
  • the solenoid winding is used because it is easy to make, fast and inexpensive. Nevertheless, in the case of a large system, it is necessary to have a large unit length of conductor, which is not always possible. In this case, i.e. a solenoid winding, it is necessary to make junctions between the layers, which is not recommended in the case of superconductivity.
  • the double-pancake winding is often used for the realization of superconducting coils at medium and high critical temperature because the unit length of commercially available conductor is insufficient, from 100m to 4km, to make a complete coil of a single piece, generally a few dozens of kms. Subsequently, a plurality of double wafers are stacked to assemble the final electromagnet. A junction is made between each double pancake. This type of junction is simpler to achieve than in the case of a solenoid winding because the junction is located on the outer radius of the electromagnet, in a weak field area.
  • MgB 2 drivers that are sensitive to deformations, unlike NbTi drivers.
  • the MgB 2 conductors have a maximum deformation threshold above which they lose their superconducting state. This limit is relatively low which imposes a minimum radius of curvature of the driver high.
  • the minimum bending radii are respectively 60mm and 260mm.
  • the invention aims to remedy all or part of the disadvantages of the state of the art identified above, and in particular to provide a winding process limiting the risk of deterioration of the conductor.
  • a winding table 1 on which are a winder plate 2 and the cylinder 8, acting as a storage volume.
  • This storage volume can be either cylindrical or conical to reduce the total height and / or to increase the radius of curvature of the driver.
  • a remover 4 comprising a support axis 5 on which is a drum 6.
  • the drum is a support for winding conductors / son.
  • the ravaleur is a motor equipped with a brake that allows to stretch drivers and re-wind them.
  • Arrow 15, on the Figures 1 to 5 represents the direction of rotation of the winding of the conductor, or unwinding of the conductor.
  • the figure 1 illustrates a first step of the winding process.
  • the drum 6 is placed on the support shaft 5 of the pumper 4 at a first part of the pumper, here the upper end of the support shaft 5 of the pumper 4.
  • the drum can be moved between the end upper of the support axis 5 of the refresher and the lower end of the support shaft 5 of the refresher, the second part of the refresher.
  • a first portion of the conductor 7 is wound around the storage volume 8, also called reserve solenoid.
  • This first step is a step that corresponds to a duplication of the driver, and unlike the prior art it is now performed directly on the winder.
  • the conductor 7 placed on the drum includes the amount necessary for winding the complete double-slab.
  • the reel is initially at the upper end of the support shaft 5 of the refurbisher, a first end of the conductor 7 is unwound from the reel and attached to the storage volume 8.
  • the driver 7 is then energized by means of the 4 and then a first portion of the conductor is wrapped around the storage volume to the winding mandrel 3 down the reel along the axis of the stripper 5, ie by moving the reel between the first part of the stripper and the second part of the ravaleur.
  • the first portion of conductor thus wound around the storage volume will be used for winding the second wafer of the double-wafer.
  • the figure 2 illustrates a second step of a winding process.
  • a first portion of the conductor is inserted into a groove (not visible) of a winding mandrel 3 which makes it possible to achieve the jump layer 9 between the first portion of the conductor and a second portion of the conductor.
  • the jump of layer is realized once the drum arrived at the level of the second part of the ravaleur.
  • the winding mandrel is placed at the second part of the storage volume, here the lower part of the storage volume.
  • Layer jump 9 can be realized under voltage or not. If it is not performed under tension, the speed of movement of the drum on the feeder is adjusted to index the angular position of the conductor at the exit of the reserve cylinder so that the diaper can then be made.
  • the figure 3 illustrates a third step of a winding process.
  • This third step corresponds to the winding of the first pancake of the double wafer.
  • the figure 4 illustrates a fourth step of a winding process which corresponds to the recovery of the first portion of the conductor for forming the second wafer for winding it over the first wafer.
  • the figure 5 illustrates a fifth step of a winding process which corresponds to the winding of the second wafer 13.
  • the first portion of the conductor is wound around a second portion of the mandrel. This winding is done in a second direction of rotation, ie by reversing the direction of rotation with respect to the preceding steps.
  • the second slab is wound over the first slab 11.
  • an insert 14 is visible. It is placed between the first wafer 11 and the second wafer 13 and serves as a winding plate for the second wafer 13 and electrical insulation.
  • a system of axial and radial press rollers 10 is installed to hold the second wafer 13 in place during its winding.

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

L'invention se rapporte au bobinage d'un conducteur, en particulier d'un supraconducteur, pour un électroaimant.The invention relates to the winding of a conductor, in particular a superconductor, for an electromagnet.

ETAT DE LA TECHNIQUE ANTERIEURESTATE OF THE PRIOR ART

Les matériaux supraconducteurs sont des matériaux qui, sous certaines conditions, voient leur résistance électrique devenir nulle. Pour cela, le matériau supraconducteur doit réunir trois conditions :

  • avoir une température inférieure à une température critique Tc ;
  • être soumis à un champ magnétique inférieur à un champ magnétique Bc;
  • avoir un courant traversant le matériau inférieur à un courant critique Jc.
Superconducting materials are materials that, under certain conditions, have their electrical resistance become zero. For this, the superconducting material must meet three conditions:
  • have a temperature below a critical temperature Tc;
  • be subjected to a magnetic field lower than a magnetic field Bc;
  • have a current flowing through the material below a critical current Jc.

Les valeurs critiques sont propres à chaque matériau. Ces trois paramètres, Tc, Bc et Jc, sont interdépendants les uns des autres, ce qui forme une surface critique. Si le matériau est en-dessous de la surface critique, il est supraconducteur, sinon il est résistif.Critical values are specific to each material. These three parameters, Tc, Bc and Jc, are interdependent, forming a critical surface. If the material is below the critical surface, it is superconducting, otherwise it is resistive.

Il existe de nombreux matériaux supraconducteurs, mais pour ce qui est de la réalisation d'électroaimant, le nombre de matériaux adéquats est réduit du fait de la petite taille de la surface critique. Actuellement le niobium titane (NbTi) est le matériau le plus utilisé en raison de son utilisation dans les appareils d'Imagerie à Résonance Magnétique (IRM) ou spectromètres RMN (Résonance Magnétique Nucléaire) qui demeurent à l'heure actuelle le principal marché industriel de la supraconductivité.There are many superconducting materials, but for the electromagnet realization, the number of suitable materials is reduced because of the small size of the critical surface. Currently niobium titanium (NbTi) is the most widely used material due to its use in Magnetic Resonance Imaging (MRI) or NMR (Nuclear Magnetic Resonance) spectrometers, which remain today the main industrial market for superconductivity.

Le Niobium 3 étain (Nb3Sn) est un matériau également utilisé pour les spectromètres RMN à très haut champ, supérieur à 10 Tesla. Le diborure de magnésium (MgB2), l'oxyde mixte de bismuth, strontium, cuivre et calcium (BiSCCO) et l'oxyde mixte de baryum, cuivre et yttrium (YBaCuO) sont également des matériaux supraconducteurs utilisés pour la fabrication d'électroaimants, mais ils sont pour l'instant confinés à la recherche et développement.Niobium 3 tin (Nb 3 Sn) is a material also used for very high field NMR spectrometers, greater than 10 Tesla. Magnesium diboride (MgB 2 ), mixed oxide of bismuth, strontium, copper and calcium (BiSCCO) and mixed oxide of barium, copper and yttrium (YBaCuO) are also superconducting materials used for the manufacture of electromagnets but they are currently confined to research and development.

Le MgB2 présente l'avantage d'avoir un coût peu élevé, d'être assez facilement utilisable et plus performant que le NbTi à température équivalente, pour un champ magnétique inférieur à 4T, l'immense majorité des IRM fonctionnant pour un champ magnétique compris entre 1,5T et 3T. L'augmentation de la température de fonctionnement permettrait de passer d'un refroidissement, dit mouillé, par bain d'hélium liquide à 4,2K à un refroidissement, dit sec, par conduction entre 10 et 20K.MgB 2 has the advantage of having a low cost, being quite easy to use and more efficient than NbTi at equivalent temperature, for a magnetic field of less than 4T, the vast majority of MRIs operating for a magnetic field between 1.5T and 3T. The increase in the operating temperature would make it possible to go from a so-called wet cooling by bath of liquid helium to 4.2K to a so-called dry cooling by conduction between 10 and 20K.

Pour ce qui est de la fabrication d'électroaimants, en particuliersupraconducteurs, il existe deux types de bobinages majoritaires :

  • le bobinage en solénoïde, qui est un enroulement couche par couche ;
  • l'empilement de double galette ou bobinage en double galette, qui est un enroulement spire par spire.
As far as the manufacture of electromagnets, in particularconductors, there are two types of majority windings:
  • the solenoid winding, which is a layer-by-layer winding;
  • the stack of double pancake or double pancake coil, which is a winding coil by turn.

Généralement, le bobinage en solénoïde est utilisé car il est facile à réaliser, rapide et peu coûteux. Néanmoins, dans le cas de système de grandes dimensions, il est nécessaire d'avoir une grande longueur unitaire de conducteur, ce qui n'est pas toujours possible. Dans ce cas, i.e. un bobinage en solénoïde, il est nécessaire de réaliser des jonctions entre les couches, ce qui n'est pas recommandé dans le cas de la supraconductivité.Generally, the solenoid winding is used because it is easy to make, fast and inexpensive. Nevertheless, in the case of a large system, it is necessary to have a large unit length of conductor, which is not always possible. In this case, i.e. a solenoid winding, it is necessary to make junctions between the layers, which is not recommended in the case of superconductivity.

Ainsi le bobinage en double galette est souvent utilisé pour la réalisation de bobines supraconductrices à moyenne et haute température critique car la longueur unitaire de conducteur disponible industriellement est insuffisante, de 100m à 4km, pour réaliser une bobine complète d'un seul tenant, généralement quelques dizaines de kms. Par la suite, une pluralité de double galette est empilée pour assembler l'électroaimant final. Une jonction est réalisée entre chaque double galette. Ce type de jonction est plus simple à réaliser que dans le cas d'un bobinage par solénoïde car la jonction est située sur le rayon extérieur de l'électroaimant, dans une zone de champ faible.Thus the double-pancake winding is often used for the realization of superconducting coils at medium and high critical temperature because the unit length of commercially available conductor is insufficient, from 100m to 4km, to make a complete coil of a single piece, generally a few dozens of kms. Subsequently, a plurality of double wafers are stacked to assemble the final electromagnet. A junction is made between each double pancake. This type of junction is simpler to achieve than in the case of a solenoid winding because the junction is located on the outer radius of the electromagnet, in a weak field area.

Généralement, le procédé de bobinage d'une double galette comporte les étapes suivantes :

  • la longueur de conducteur nécessaire au bobinage d'une double galette est dédoublée. La moitié du conducteur est transférée d'un premier touret sur un deuxième touret. Chaque touret contient ainsi la longueur de conducteur nécessaire au bobinage de chaque galette.
  • les tourets sont transférés sur une bobineuse. Un des tourets est installé sur un ravaleur, système permettant d'imposer une tension dans le conducteur, pour le bobinage de la première galette. Le second touret, dit de réserve, est installé au-dessus de la table de bobinage afin de lier cinématiquement le touret de réserve à la rotation de la table de bobinage afin d'éviter que le conducteur du touret de réserve ne se débobine pendant qu'on réalise la première galette.
  • mise en place du saut de couche et bobinage de la première galette ;
  • une fois la première galette bobinée, déplacement latéral du ravaleur puis transfert du touret de réserve sur le ravaleur ce qui permet de bobiner la deuxième galette.
Generally, the method of winding a double wafer comprises the following steps:
  • the length of conductor required for the winding of a double slab is split. Half of the driver is transferred from a first drum to a second drum. Each drum thus contains the length of conductor necessary for the winding of each slab.
  • the reels are transferred to a winder. One of the drums is installed on a reed, system for imposing tension in the conductor, for the winding of the first slab. The second reel, called reserve, is installed above the winding table to kinematically bind the spare drum to the rotation of the winding table to prevent the driver of the spare reel unwinds while the first cake is made.
  • setting up the diaper jump and winding the first slab;
  • once the first wafer coiled, lateral displacement of the ravaleur and transfer of the reserve drum on the ravaleur which allows to wind the second cake.

Cette technique de bobinage en double galette a été initialement développée pour le bobinage de conducteur en NbTi. Cependant, elle est difficile à appliquer pour les conducteurs en MgB2 qui sont sensibles aux déformations contrairement aux conducteurs en NbTi. Les conducteurs en MgB2 présentent un seuil de déformations maximum au-dessus duquel ils perdent leur état supraconducteur. Cette limite est relativement basse ce qui impose un rayon minimum de courbure du conducteur élevé. Pour un conducteur standard ayant une section de 0,7*3.1mm2, les rayons minimums de courbure sont respectivement de 60mm et 260mm.This double pancake coil technique was originally developed for NbTi conductor winding. However, it is difficult to apply for MgB 2 drivers that are sensitive to deformations, unlike NbTi drivers. The MgB 2 conductors have a maximum deformation threshold above which they lose their superconducting state. This limit is relatively low which imposes a minimum radius of curvature of the driver high. For a standard conductor having a section of 0.7 * 3.1mm 2 , the minimum bending radii are respectively 60mm and 260mm.

En outre, il est quasiment impossible de dire si un conducteur est abimé ou non pendant le bobinage. Un tel problème sera vu seulement lors de la mise en marche finale de l'aimant, à moins de tester indépendamment chaque double galette ce qui est long et coûteux. Comme il est impossible pour un aimant supraconducteur d'être partiellement résistif, si jamais une double galette est défectueuse, il est nécessaire de démonter l'aimant et de remplacer la double galette. Ainsi, il est nécessaire de limiter les risques de dégradation du conducteur pendant le bobinage.In addition, it is almost impossible to tell if a driver is damaged or not during winding. Such a problem will be seen only during the final start-up of the magnet, unless independently testing each double wafer which is long and expensive. As it is impossible for a superconducting magnet to be partially resistive, if ever a double wafer is defective, it is necessary to disassemble the magnet and replace the double wafer. Thus, it is necessary to limit the risk of degradation of the conductor during winding.

Les étapes qui sont particulièrement critiques pour un conducteur fragile comme le MgB2 sont :

  • les opérations de dédoublement et de transfert des tourets sur la bobineuse, le conducteur entre les deux tourets étant libre de mouvement et risquant donc de s'abimer ;
  • la mise en forme du saut de couche se fait dans un outillage spécifique. le conducteur est ensuite rabattu dans le mandrin de bobinage, le conducteur est alors également libre de mouvement et donc susceptible de s'abimer ;
  • l'opération de transfert du touret de réserve sur le ravaleur pour le bobinage de la deuxième galette car il faut généralement dérouler du conducteur pour rejoindre le ravaleur. En outre, le conducteur est bloqué à la sortie du saut de couche ce qui crée un point de concentration des efforts, le conducteur peut donc facilement être abimé.
The steps that are particularly critical for a fragile driver like MgB 2 are:
  • the operations of duplication and transfer of the reels on the rewinder, the driver between the two reels being free of movement and therefore likely to be damaged;
  • the formatting of the jump of layer is done in a specific tooling. the conductor is then folded into the winding mandrel, the driver is then also free of movement and therefore likely to be damaged;
  • the transfer operation of the spare drum on the reel for the winding of the second pancake because it is usually necessary to unroll the driver to reach the raveleur. In addition, the driver is blocked at the exit of the diaper jump which creates a point of concentration of effort, the driver can easily be damaged.

Ces problèmes, critiques pour les supraconducteurs, existent aussi pour les autres enroulements conducteurs, que le conducteur soit isolé ou non, supraconducteur ou non.These problems, critical for superconductors, also exist for other conductive windings, whether the driver is isolated or not, superconducting or not.

Le document US8,344,835 B1 divulgue un procédé de bobinage en double-galette d'un fil supraconducteur.The document US8,344,835 B1 discloses a double-wafer winding process of a superconducting wire.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

L'invention vise à remédier à tout ou partie des inconvénients de l'état de la technique identifiés ci-dessus, et notamment à proposer un procédé de bobinage limitant les risques de détérioration du conducteur.The invention aims to remedy all or part of the disadvantages of the state of the art identified above, and in particular to provide a winding process limiting the risk of deterioration of the conductor.

Dans ce dessein, un aspect de l'invention se rapporte à un procédé de bobinage en double-galette d'un conducteur, ladite double-galette comportant une première galette et une deuxième galette, un touret comportant initialement ledit conducteur, ledit procédé comportant :

  • une première étape dans laquelle le touret est placé sur un ravaleur et une première portion du conducteur est enroulée autour d'un volume de stockage ;
  • une deuxième étape dans laquelle une première partie du conducteur est insérée dans un mandrin de bobinage de façon à réaliser un saut de couche ;
  • une troisième étape dans laquelle une deuxième portion du conducteur est bobinée autour d'une première partie du mandrin de façon à former une première galette ;
  • une quatrième étape, dans laquelle la première portion du conducteur est déroulée du volume de stockage et enroulée autour du touret ;
  • une cinquième étape, dans laquelle la première portion du conducteur est bobinée autour d'une deuxième partie du mandrin de façon à former une deuxième galette.
In this purpose, one aspect of the invention relates to a double-wafer winding process of a conductor, said double-wafer comprising a first wafer and a second wafer, a drum initially comprising said conductor, said method comprising:
  • a first step in which the reel is placed on a reed and a first portion of the conductor is wrapped around a storage volume;
  • a second step in which a first portion of the conductor is inserted into a winding mandrel so as to make a jump of layer;
  • a third step in which a second portion of the conductor is wound around a first portion of the mandrel so as to form a first slab;
  • a fourth step, wherein the first portion of the conductor is unwound from the storage volume and wound around the drum;
  • a fifth step, wherein the first portion of the conductor is wound around a second portion of the mandrel so as to form a second wafer.

Ainsi les opérations de dédoublement du conducteur et de transfert ont été supprimées, ce qui permet d'éviter les risques de détérioration du conducteur qui existaient jusqu'alors. En outre, ce procédé permet de garder en permanence le conducteur sous tension ce qui empêche ainsi tout mouvement non désiré du conducteur.Thus the operations of duplicating the driver and transfer have been removed, which avoids the risk of deterioration of the driver that existed until then. Moreover, this method makes it possible to permanently keep the conductor energized, which thus prevents any unwanted movement of the conductor.

Outre les caractéristiques principales qui viennent d'être mentionnées dans le paragraphe précédent, le procédé selon l'invention peut présenter une ou plusieurs caractéristiques complémentaires parmi les suivantes, considérées individuellement ou selon les combinaisons techniquement possibles :

  • lors de la première étape, le touret est placé au niveau d'une première partie du ravaleur, le touret étant déplaçable entre la première partie du ravaleur et une deuxième partie du ravaleur ; la première portion du conducteur est enroulée entre une première partie du volume de stockage et une deuxième partie du volume de stockage dans un premier sens de rotation grâce au déplacement du touret entre la première partie du ravaleur et la deuxième partie du ravaleur ;
  • la deuxième étape est réalisée une fois le touret arrivé au niveau de la deuxième partie du ravaleur, le mandrin de bobinage étant placé au niveau de la deuxième partie du volume de stockage ;
  • lors de la troisième étape, la deuxième portion du conducteur est bobinée dans le premier sens de rotation, le touret restant fixe au niveau de la deuxième partie du ravaleur ;
  • lors de la quatrième étape, le touret est initialement placé sur le ravaleur au niveau de la première partie du ravaleur et la première portion du conducteur est déroulée du volume de stockage dans le premier sens de rotation grâce au déplacement du touret entre la première partie du ravaleur et la deuxième partie du ravaleur ;
  • lors de la cinquième étape le bobinage de la première portion du conducteur se fait dans un deuxième sens de rotation au-dessus de la première galette ;
  • lors de la deuxième étape, la deuxième partie du conducteur est insérée dans une rainure du mandrin de bobinage ;
  • lors de la troisième étape, le conducteur est maintenu en position au moyen d'un système de galets presseurs axiaux et radiaux ;
  • lors de la quatrième étape, le conducteur est maintenu en position au moyen d'un système de galets presseurs axiaux et radiaux ;
  • lors de la quatrième étape, le ravaleur est décalé radialement ;
  • lors de la quatrième étape, le touret est retourné sur l'axe du ravaleur ;lors de la troisième étape, le conducteur formant la première galette est bridé, une fois la première galette formée ;
  • le procédé comporte une sixième étape préliminaire à la cinquième étape, dans laquelle un intercalaire est positionné au-dessus de la première galette de façon à s'intercaler entre la première galette et la deuxième galette.
In addition to the main features that have just been mentioned in the preceding paragraph, the method according to the invention may have one or more additional characteristics among the following, considered individually or according to the technically possible combinations:
  • during the first step, the reel is placed at a first portion of the reefer, the reel being movable between the first part of the reed and a second part of the reedberder; the first portion of the conductor is wound between a first portion of the storage volume and a second portion of the storage volume in a first direction of rotation due to the movement of the reel between the first part of the reed and the second part of the reed;
  • the second step is carried out once the drum has arrived at the second part of the refill, the winding mandrel being placed at the second part of the storage volume;
  • during the third step, the second portion of the conductor is wound in the first direction of rotation, the reel remaining fixed at the second part of the refresher;
  • during the fourth step, the drum is initially placed on the rake at the first part of the rake and the first portion of the rider is unrolled from the storage volume in the first direction of rotation by moving the drum between the first part of the reamer ravaleur and the second part of the ravaleur;
  • during the fifth step the winding of the first portion of the conductor is in a second direction of rotation above the first wafer;
  • in the second step, the second portion of the conductor is inserted into a groove of the winding mandrel;
  • during the third step, the conductor is held in position by means of a system of axial and radial press rollers;
  • in the fourth step, the conductor is held in position by means of a system of axial and radial press rollers;
  • in the fourth step, the reamer is radially offset;
  • during the fourth step, the reel is returned to the axis of the reedberder, during the third stage, the conductor forming the first slab is clamped, once the first slab formed;
  • the method comprises a sixth step preliminary to the fifth step, wherein a spacer is positioned above the first wafer so as to be interposed between the first wafer and the second wafer.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres caractéristiques et avantages de l'invention ressortiront à la lecture de la description qui suit, en référence aux figures annexées, qui illustrent : les figures 1 à 5, des vues schématiques des différentes étapes d'un procédé de bobinage selon un mode de réalisation de l'invention.Other characteristics and advantages of the invention will emerge on reading the description which follows, with reference to the appended figures, which illustrate: Figures 1 to 5 , schematic views of the different steps of a winding method according to one embodiment of the invention.

Pour plus de clarté, les éléments identiques ou similaires sont repérés par des signes de référence identiques sur l'ensemble des figures.For the sake of clarity, identical or similar elements are marked with identical reference signs throughout the figures.

DESCRIPTION DETAILLEE D'UN MODE DE EALISATIONDETAILED DESCRIPTION OF AN ELEMENT MODE

Sur les figures 1 à 5, sont illustrés les mêmes éléments, à savoir une table de bobinage 1 sur laquelle se trouvent un plateau de bobineuse 2 et le cylindre 8, jouant le rôle de volume de stockage. Ce volume de stockage peut être soit cylindrique, soit conique pour diminuer la hauteur totale et/ou pour augmenter le rayon de courbure du conducteur. Sont également illustrés un ravaleur 4, comportant un axe de support 5 sur lequel se trouve un touret 6. Le touret est un support pour enrouler des conducteurs/fils. Le ravaleur est un moteur équipé d'un frein qui permet de tendre des conducteurs et de les ré-enrouler. La flèche 15, sur les figures 1 à 5, représente le sens de rotation de l'enroulement du conducteur, ou déroulement du conducteur.On the Figures 1 to 5 , are illustrated the same elements, namely a winding table 1 on which are a winder plate 2 and the cylinder 8, acting as a storage volume. This storage volume can be either cylindrical or conical to reduce the total height and / or to increase the radius of curvature of the driver. Also illustrated is a remover 4, comprising a support axis 5 on which is a drum 6. The drum is a support for winding conductors / son. The ravaleur is a motor equipped with a brake that allows to stretch drivers and re-wind them. Arrow 15, on the Figures 1 to 5 , represents the direction of rotation of the winding of the conductor, or unwinding of the conductor.

La figure 1 illustre une première étape du procédé de bobinage. Le touret 6 est placé sur l'axe de support 5 du ravaleur 4 au niveau d'une première partie du ravaleur, ici l'extrémité supérieure de l'axe de support 5 du ravaleur 4. Le touret peut être déplacé entre l'extrémité supérieure de l'axe de support 5 du ravaleur et l'extrémité inférieure de l'axe de support 5 du ravaleur, deuxième partie du ravaleur. Une première portion du conducteur 7 est enroulée autour du volume de stockage 8, dit aussi solénoïde de réserve. Cette première étape est une étape qui correspond à un dédoublement du conducteur, et contrairement à l'art antérieur elle est maintenant effectuée directement sur la bobineuse. Le conducteur 7 placé sur le touret comporte la quantité nécessaire au bobinage de la double-galette complète. Le touret est initialement au niveau de l'extrémité supérieure de l'axe de support 5 du ravaleur, une première extrémité du conducteur 7 est déroulée du touret et attachée au volume de stockage 8. Le conducteur 7 est alors mis sous tension au moyen du ravaleur 4 puis une première portion du conducteur est enroulée autour du volume de stockage jusqu'au mandrin de bobinage 3 en descendant le touret le long de l'axe du ravaleur 5, i.e. en déplaçant le touret entre la première partie du ravaleur et la deuxième partie du ravaleur. La première portion de conducteur ainsi enroulée autour du volume de stockage servira au bobinage de la deuxième galette de la double-galette.The figure 1 illustrates a first step of the winding process. The drum 6 is placed on the support shaft 5 of the pumper 4 at a first part of the pumper, here the upper end of the support shaft 5 of the pumper 4. The drum can be moved between the end upper of the support axis 5 of the refresher and the lower end of the support shaft 5 of the refresher, the second part of the refresher. A first portion of the conductor 7 is wound around the storage volume 8, also called reserve solenoid. This first step is a step that corresponds to a duplication of the driver, and unlike the prior art it is now performed directly on the winder. The conductor 7 placed on the drum includes the amount necessary for winding the complete double-slab. The reel is initially at the upper end of the support shaft 5 of the refurbisher, a first end of the conductor 7 is unwound from the reel and attached to the storage volume 8. The driver 7 is then energized by means of the 4 and then a first portion of the conductor is wrapped around the storage volume to the winding mandrel 3 down the reel along the axis of the stripper 5, ie by moving the reel between the first part of the stripper and the second part of the ravaleur. The first portion of conductor thus wound around the storage volume will be used for winding the second wafer of the double-wafer.

La figure 2 illustre une deuxième étape d'un procédé de bobinage. Une première partie du conducteur est insérée dans une rainure (non visible) d'un mandrin de bobinage 3 ce qui permet de réaliser le saut de couche 9 entre la première portion du conducteur et une deuxième portion du conducteur. Le saut de couche est réalisé une fois le touret arrivé au niveau de la deuxième partie du ravaleur. Le mandrin de bobinage est placé au niveau de la deuxième partie du volume de stockage, ici la partie inférieure du volume de stockage. Le saut de couche 9 peut être réalisé sous tension ou non. S'il n'est pas réalisé sous tension, la vitesse de déplacement du touret sur le ravaleur est ajustée pour indexer la position angulaire du conducteur à la sortie du cylindre de réserve afin de pouvoir ensuite réaliser le saut de couche.The figure 2 illustrates a second step of a winding process. A first portion of the conductor is inserted into a groove (not visible) of a winding mandrel 3 which makes it possible to achieve the jump layer 9 between the first portion of the conductor and a second portion of the conductor. The jump of layer is realized once the drum arrived at the level of the second part of the ravaleur. The winding mandrel is placed at the second part of the storage volume, here the lower part of the storage volume. Layer jump 9 can be realized under voltage or not. If it is not performed under tension, the speed of movement of the drum on the feeder is adjusted to index the angular position of the conductor at the exit of the reserve cylinder so that the diaper can then be made.

La figure 3 illustre une troisième étape d'un procédé de bobinage. Cette troisième étape correspond au bobinage de la première galette de la double galette. Une fois le touret 6 arrivé au niveau de l'extrémité inférieure de l'axe de support 5 du ravaleur, deuxième partie du ravaleur, et le saut de couche effectué, une deuxième portion du conducteur est bobinée, dans un premier sens de rotation 15, autour d'une première partie du mandrin de façon à former la première galette 11. Le touret est maintenu fixe dans sa position ce qui permet de bobiner la première galette 11. Des systèmes de galets presseurs axiaux et radiaux 10 sont ajoutés pour maintenir en position le conducteur lors du bobinage de la première galette.The figure 3 illustrates a third step of a winding process. This third step corresponds to the winding of the first pancake of the double wafer. Once the reel 6 has arrived at the lower end of the support shaft 5 of the pumper, the second part of the pumper, and the leap made, a second portion of the conductor is wound in a first direction of rotation 15 , around a first portion of the mandrel so as to form the first slab 11. The drum is held stationary in its position which allows to wind the first slab 11. Axial and radial press roller systems 10 are added to maintain position the driver when winding the first slab.

La figure 4 illustre une quatrième étape d'un procédé de bobinage qui correspond à la récupération de la première portion du conducteur destinée à former la deuxième galette en vue de son bobinage au-dessus de la première galette. Une fois la première galette bobinée et le conducteur bridé, le ravaleur 4 est décalé radialement et le touret 12 vide est remonté au niveau de la première partie du ravaleur, i.e. l'extrémité supérieure de l'axe du ravaleur. La première portion du conducteur est alors déroulée du volume de stockage et enroulée autour du touret vide dans le premier sens de rotation en déplaçant le touret de la première partie du ravaleur vers la deuxième partie du ravaleur, i.e. en descendant le touret jusqu'à la sortie du saut de couche 9.The figure 4 illustrates a fourth step of a winding process which corresponds to the recovery of the first portion of the conductor for forming the second wafer for winding it over the first wafer. Once the first wafer wound and the flanged conductor, the flapper 4 is radially offset and the empty drum 12 is raised to the level of the first part of the scavenger, ie the upper end of the axis of the scavenger. The first portion of the conductor is then unrolled from the storage volume and wrapped around the empty drum in the first direction of rotation by moving the drum of the first part of the funnel to the second part of the funnel, ie by lowering the drum to the exit of the jump of layer 9.

La figure 5 illustre une cinquième étape d'un procédé de bobinage qui correspond au bobinage de la deuxième galette 13. La première portion du conducteur est bobinée autour d'une deuxième partie du mandrin. Ce bobinage se fait dans un deuxième sens de rotation, i.e. en inversant le sens de rotation par rapport aux étapes précédentes. La deuxième galette est bobinée au-dessus de la première galette 11. Sur la figure 5, un intercalaire 14 est visible. Il est placé entre la première galette 11 et la deuxième galette 13 et sert de plateau de bobinage pour la deuxième galette 13 et d'isolant électrique. Un système de galets presseurs axiaux et radiaux 10 est installé pour maintenir la deuxième galette 13 en place pendant son bobinage.The figure 5 illustrates a fifth step of a winding process which corresponds to the winding of the second wafer 13. The first portion of the conductor is wound around a second portion of the mandrel. This winding is done in a second direction of rotation, ie by reversing the direction of rotation with respect to the preceding steps. The second slab is wound over the first slab 11. On the figure 5 an insert 14 is visible. It is placed between the first wafer 11 and the second wafer 13 and serves as a winding plate for the second wafer 13 and electrical insulation. A system of axial and radial press rollers 10 is installed to hold the second wafer 13 in place during its winding.

L'invention n'est pas limitée aux modes de réalisation précédemment décrits en référence aux figures et des variantes pourraient être envisagées sans sortir du cadre de l'invention.The invention is not limited to the embodiments previously described with reference to the figures and variants could be envisaged without departing from the scope of the invention.

Claims (13)

  1. A method for winding a conductor in a double pancake, said double pancake comprising a first pancake and a second pancake, a cable drum (6) initially comprising said conductor, said method comprising:
    - a first step in which the cable drum (6) is placed on a tensioner (4) and a first portion of the conductor is wound around a storage volume (8);
    - a second step in which a first portion of the conductor is inserted into a winding mandrel (3) so as to perform a layer jump;
    - a third step in which a second portion of the conductor is wound around a first part of the mandrel (3) so as to form a first pancake (11);
    - a fourth step, in which the first portion of the conductor is unwound from the storage volume (8) and wound around the cable drum (6);
    - a fifth step, in which the first portion of the conductor is wound around a second part of the mandrel (3) so as to form a second pancake (13).
  2. The method according to claim 1, characterised in that during the first step, the cable drum (6) is placed at a first part of the tensioner, the cable drum (6) being movable between the first part of the tensioner and a second part of the tensioner, the first portion of the conductor is wound between a first part of the storage volume (8) and a second part of the storage volume (8) in a first direction of rotation thanks to the movement of the cable drum (6) between the first part of the tensioner and the second part of the tensioner.
  3. The method according to claim 2, characterised in that the second step is performed once the cable drum (6) has come at the second part of the tensioner, the winding mandrel (3) being placed at the second part of the storage volume.
  4. The method according to any of claims 2 or 3, characterised in that during the third step, the second portion of the conductor is wound in the first direction of rotation, the cable drum (6) remaining fixed at the second part of the tensioner.
  5. The method according to any of claims 2 to 4, characterised in that during the fourth step, the cable drum (6) is initially placed on the tensioner (4) at the first part of the tensioner and the first portion of the conductor is unwound from the storage volume in the first direction of rotation thanks to the movement of the cable drum (6) between the first part of the tensioner and the second part of the tensioner.
  6. The method according to any of the preceding claims, characterised in that during the fifth step, the winding of the first portion of the conductor is made in a second direction of rotation above the first pancake.
  7. The method according to any of the preceding claims, characterised in that during the second step, the second part of the conductor is inserted into a groove of the winding mandrel.
  8. The method according to any of the preceding claims, characterised in that during the third step, the conductor is held in position by means of an axial and radial pressure roller system (10).
  9. The method according to any of the preceding claims, characterised in that during the fourth step, the conduction is held in position by means of an axial and radial pressure roller system (10).
  10. The method according to any of the preceding claims, characterised in that during the fourth step, the tensioner is radially offset.
  11. The method according to any of claims 1 to 9, characterised in that during the fourth step, the cable drum is returned to the axis of the tensioner.
  12. The method according to any of the preceding claims, characterised in that during the third step, the conductor forming the first pancake is restrained, once the first pancake is formed.
  13. The method according to any of the preceding claims, characterised in that it comprises a sixth step preliminary to the fifth step, in which an insert (14) is placed above the first pancake so as to be interposed between the first pancake and the second pancake.
EP14196986.5A 2013-12-19 2014-12-09 Method for winding a conductor in a double pancake Not-in-force EP2887363B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1362981A FR3015764B1 (en) 2013-12-19 2013-12-19 DOUBLE-GALETTE WINDING METHOD OF A DRIVER

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EP2887363A1 EP2887363A1 (en) 2015-06-24
EP2887363B1 true EP2887363B1 (en) 2016-05-04

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WO2018176338A1 (en) * 2017-03-30 2018-10-04 深圳市立昌机电设备有限公司 Method and system for controlling rotation of winding machine
WO2018176390A1 (en) * 2017-03-31 2018-10-04 深圳市立昌机电设备有限公司 Safety precaution method and system for winding machine
CN113257515B (en) * 2021-07-12 2021-09-28 四川大学 High-temperature superconducting double-pancake coil and winding and fixing method thereof

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US3307247A (en) * 1964-02-12 1967-03-07 Wagner Electric Corp Method of winding coils
US5531015A (en) * 1994-01-28 1996-07-02 American Superconductor Corporation Method of making superconducting wind-and-react coils
US20060071747A1 (en) * 2004-10-04 2006-04-06 Bar Ilan University Method for manufacturing superconducting coils
ITTO20070940A1 (en) * 2007-12-27 2009-06-28 Asg Superconductors S P A COIL WITH SUPERCONDUCTIVE COOLING COOLED WITHOUT CRYOGENIC FLUIDS
JP4997330B2 (en) * 2010-07-27 2012-08-08 株式会社神戸製鋼所 Multiphase transformer and transformer system
DE102011082652B4 (en) * 2011-09-14 2013-08-01 Bruker Biospin Ag Method for producing a magnet coil arrangement from a slotted strip-shaped conductor and magnet coil arrangement
KR101281779B1 (en) * 2012-03-26 2013-07-02 연세대학교 산학협력단 Winding method of superconducting wires and magnet fabricated by the same

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US20150179338A1 (en) 2015-06-25
EP2887363A1 (en) 2015-06-24
FR3015764A1 (en) 2015-06-26
US9828206B2 (en) 2017-11-28
FR3015764B1 (en) 2016-02-05

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