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EP0309359A1 - Method for automatically controlling the self-inductance of wound elements comprising a magnetic circuit with an adjustable air gap - Google Patents

Method for automatically controlling the self-inductance of wound elements comprising a magnetic circuit with an adjustable air gap Download PDF

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Publication number
EP0309359A1
EP0309359A1 EP88402401A EP88402401A EP0309359A1 EP 0309359 A1 EP0309359 A1 EP 0309359A1 EP 88402401 A EP88402401 A EP 88402401A EP 88402401 A EP88402401 A EP 88402401A EP 0309359 A1 EP0309359 A1 EP 0309359A1
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EP
European Patent Office
Prior art keywords
inductance
circuit
self
air gap
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88402401A
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German (de)
French (fr)
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EP0309359B1 (en
Inventor
François Thommelin
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Orega Electronique et Mecanique
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Orega Electronique et Mecanique
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Publication of EP0309359A1 publication Critical patent/EP0309359A1/en
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps

Definitions

  • the present invention relates to a method for automatically adjusting the self-inductance of wound elements comprising an adjustable gap magnetic circuit.
  • Another known solution consists in depositing glue between the two ferrites and immobilizing them during the glue polymerization time after having carried out the electric adjustment of the self-inductance.
  • Such a process cannot be automated because the tolerance for maintaining the distance between the two ferrites is a few hundredths of a millimeter, and because it is mass production (for example 400 pieces per 'time), the parts must be moved during polymerization, which gives them vibrations and does not allow the required precision of the air gap adjustment to be reached.
  • an electrically conductive material such as graphite must be deposited on the inter-ferrite joint in order to ensure the electrical continuity between the ferrites, which requires a step and additional means to effect this deposition. .
  • the subject of the present invention is a method for easily adjusting the mutual spacing of the ferrites of a wound product, with a view to adjusting the self-inductance of this product, this method making it possible to obtain a high precision of the mutual spacing of the ferrites, this spacing not being liable to be modified before the mutual fixing of the ferrites, even when they are transferred from one work station to another, this process making it possible to obtain high production rates.
  • the method according to the invention consists in depositing on the air gap of the lower magnetic half-circuit provided with its coil at least two points of deferred setting adhesive, then at least two elements made of relatively soft non-magnetic material, electrically conductive, with almost zero elastic range, place the upper magnetic half-circuit on the lower, by exerting a slight pressure on the upper magnetic half-circuit, adjust the thickness of the air gap of the magnetic circuit by checking the value of the self-inductance of the wound product while the air gap elements are being crushed, and to maintain said low pressure during the setting time of the adhesive.
  • the air gap elements are lead balls.
  • the drawing shows a cylindrical coil 1 surrounded by a magnetic circuit comprising two half-ferrites in the shape of a "U", referenced 2, 3 respectively, but it is understood that the invention is not limited to such forms of coils and ferrites, and that it applies in all cases where one has to adjust the self-inductance of a wound product by adjusting the mutual distance of ferrites (or similar products) forming part of its magnetic circuit.
  • a movable support S one of the half-ferrites, for example the half-ferrite 2, which will be the lower half-ferrite, so that its air gap plane 4 (that is to say its planar face which is opposite the plane face of the other half-ferrite, and between which the air gap is defined) is horizontal.
  • the coil 1 is put in place on the ferrite 2.
  • a silicone pad 1A serving as a shock absorber.
  • each point of adhesive is deposited substantially in the center of the upper face (which is in the air gap) of each leg of the "U”.
  • the glue points are deposited diametrically opposite, in the middle of the width of the crown formed by the face upper of the lower ferrite.
  • a lead ball 7, 8 is placed in the middle of each point of glue 4, 5.
  • These balls have, for example, the shape of spheres with a diameter of approximately 1.2 mm. The diameter of these balls is slightly greater, about 0.5 to 1 mm, than the maximum value that the thickness of the air gap of the regulated coils can have (maximum value determined experimentally on a large series of coils).
  • the self-inductance of the product constituted by the coil 1 and its magnetic circuit 2, 3 is adjusted.
  • This adjustment is carried out by connecting the terminals of the coil 1 to a conventional inductance measuring device (not shown). and by applying to the ferrite 3 a force F of approximately 60 kg at most via a block 10 passing through the central opening 11 of the frame 9 and supported on the upper face of the ferrite 3.
  • This force F progressive , crushes the balls 7, 8, and is applied as long as the desired inductance is not reached, that is to say as long as the air gap between the ferrites 2, 3 is greater than the value corresponding to said inductance desired.
  • the adhesive used is electrically a good insulator, but, since its polymerization takes place only after a time which, although relatively short, is greater than the time for adjusting the inductance of the coil with its circuit magnetic, the pressure P induced by the crushing force applied to the balls 7, 8 (which are simply placed on the glue dots 5, 6) drives out the glue in the areas of the lower and upper caps of these balls which come into contact with the gap surfaces of the ferrites 2, 3. Thus, the electrical continuity is ensured between the ferrites 2, 3 via the balls 7, 8.
  • the break in electrical continuity between the ferrites thus produced is immediately detected, and the defective wound product (from the point of view of electrical continuity) can be easily identified and repaired off the production line.
  • the elements 9, 10 are not metallic, and are therefore electrically isolated from the support S (if the latter is itself metallic).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

In order to control the air-gap of a coiled article with magnetic circuit (2, 3), lead beads (7, 8) and spots of adhesive (5, 6) are placed inside this air-gap. Regulated squashing of these beads allows easy and automatic control of the inductance of the coiled article. <IMAGE>

Description

La présente invention se rapporte à un procédé de réglage automatique de self-inductance d'éléments bobinés comportant un circuit magnétique à entrefer ajustable.The present invention relates to a method for automatically adjusting the self-inductance of wound elements comprising an adjustable gap magnetic circuit.

Lorsque l'on doit effectuer le réglage de la self-inductance d'un produit bobiné comportant deux ferrites à écartement variable, par réglage de cet écartement, on peut interposer entre ces deux ferrites une cale d'épaisseur déterminée, mais une telle solution est souvent difficile à mettre en oeuvre et nécessite un grand stock de cales d'épaisseurs différentes, et pour certains produits impossible à mettre en oeuvre de par l'incompatibilité entre la précision de réglage demandée et les tolérances dimensionnelles des éléments ferrites.When the self-inductance of a wound product having two variable-spacing ferrites must be adjusted, by adjusting this spacing, a shim of determined thickness can be interposed between these two ferrites, but such a solution is often difficult to implement and requires a large stock of shims of different thicknesses, and for certain products impossible to implement due to the incompatibility between the required adjustment precision and the dimensional tolerances of the ferrite elements.

Une autre solution connue consiste à déposer de la colle entre les deux ferrites et à les immobiliser pendant le temps de polyméri­sation de la colle après avoir effectué le réglage électrique de la self-inductance. Un tel procédé n'est pas automatisable car la tolérance de maintien de la distance entre les deux ferrites est de quelques centièmes de millimètre, et du fait qu'il s'agit d'une fabrication en grande série (par exemple 400 pièces à l'heure), il faut déplacer les pièces en cours de polymérisation, ce qui leur communique des vibrations et ne permet pas d'atteindre la précision demandée du réglage de l'entrefer. En outre, après polymérisation de la colle, il faut déposer un matériau électriquement conducteur tel que du graphite sur le joint inter-ferrites afin d'assurer la continuïté électrique entre les ferrites, ce qui nécessite une étape et des moyens supplémentaires pour effectuer ce dépôt.Another known solution consists in depositing glue between the two ferrites and immobilizing them during the glue polymerization time after having carried out the electric adjustment of the self-inductance. Such a process cannot be automated because the tolerance for maintaining the distance between the two ferrites is a few hundredths of a millimeter, and because it is mass production (for example 400 pieces per 'time), the parts must be moved during polymerization, which gives them vibrations and does not allow the required precision of the air gap adjustment to be reached. In addition, after polymerization of the adhesive, an electrically conductive material such as graphite must be deposited on the inter-ferrite joint in order to ensure the electrical continuity between the ferrites, which requires a step and additional means to effect this deposition. .

La présente invention a pour objet un procédé permettant d'effectuer facilement le réglage de l'écartement mutuel des fer­rites d'un produit bobiné, en vue de réaliser le réglage de la self-­inductance de ce produit, ce procédé permettant d'obtenir une grande précision de l'écartement mutuel des ferrites, cet écar­tement ne risquant pas d'être modifié avant la fixation mutuelle des ferrites, même lorsque celles-ci sont transférées d'un poste de travail à un autre, ce procédé permettant d'obtenir des cadences de production élevées.The subject of the present invention is a method for easily adjusting the mutual spacing of the ferrites of a wound product, with a view to adjusting the self-inductance of this product, this method making it possible to obtain a high precision of the mutual spacing of the ferrites, this spacing not being liable to be modified before the mutual fixing of the ferrites, even when they are transferred from one work station to another, this process making it possible to obtain high production rates.

Le procédé conforme à l'invention consiste à déposer sur le plan d'entrefer du demi-circuit magnétique inférieur muni de sa bobine au moins deux points de colle à prise différée, puis au moins deux éléments en matériau relativement mou amagnétique, électri­quement conducteur, à domaine élastique quasi-nul, à poser le demi-­circuit magnétique supérieur sur l'inférieur, en exerçant une faible pression sur le demi-circuit magnétique supérieur, à régler l'épais­seur de l'entrefer du circuit magnétique en contrôlant la valeur de la self-inductance du produit bobiné pendant que l'on écrase les élé­ments d'entrefer, et à maintenir ladite faible pression pendant le temps de prise de la colle. De façon avantageuse, les éléments d'entrefer sont des billes en plomb.The method according to the invention consists in depositing on the air gap of the lower magnetic half-circuit provided with its coil at least two points of deferred setting adhesive, then at least two elements made of relatively soft non-magnetic material, electrically conductive, with almost zero elastic range, place the upper magnetic half-circuit on the lower, by exerting a slight pressure on the upper magnetic half-circuit, adjust the thickness of the air gap of the magnetic circuit by checking the value of the self-inductance of the wound product while the air gap elements are being crushed, and to maintain said low pressure during the setting time of the adhesive. Advantageously, the air gap elements are lead balls.

La présente invention sera mieux comprise à la lecture de la description détaillée d'un mode de réalisation, pris comme exemple non limitatif, et illustré par le dessin annexé, dont la figure unique est une vue simplifiée en coupe d'un produit bobiné à ferrites, muni de billes de réglage conformes à l'invention, avant réglage de son inductance.The present invention will be better understood on reading the detailed description of an embodiment, taken as a nonlimiting example, and illustrated by the appended drawing, the single figure of which is a simplified sectional view of a product wound with ferrites. , provided with adjustment balls according to the invention, before adjusting its inductance.

On a représenté sur le dessin une bobine cylindrique 1 entourée par un circuit magnétique comportant deux demi-ferrites en forme de "U", référencées 2, 3 respectivement, mais il est bien entendu que l'invention n'est pas limitée à de telles formes de bobines et de ferrites, et qu'elle s'applique dans tous les cas où l'on a à régler la self-inductance d'un produit bobiné en réglant la distance mutuelle de ferrites (ou produits analogues) faisant partie de son circuit magnétique.The drawing shows a cylindrical coil 1 surrounded by a magnetic circuit comprising two half-ferrites in the shape of a "U", referenced 2, 3 respectively, but it is understood that the invention is not limited to such forms of coils and ferrites, and that it applies in all cases where one has to adjust the self-inductance of a wound product by adjusting the mutual distance of ferrites (or similar products) forming part of its magnetic circuit.

Pour effectuer le réglage de la self-inductance de la bobine 1, on procède de la façon suivante.To adjust the self-inductance of the coil 1, proceed as follows.

Pour la commodité de la mise en oeuvre du procédé, et en particulier pour pouvoir garder en place les billes et les points de colle, on dispose sur un support mobile S l'un des demi-ferrites, par exemple le demi-ferrite 2, qui sera le demi-ferrite inférieur, de telle façon que son plan d'entrefer 4 (c'est-à-dire sa face plane qui est en vis-à-vis de la face plane de l'autre demi-ferrite, et entre lesquels est défini l'entrefer) soit horizontal. On met en place la bobine 1 sur le ferrite 2. Afin d'assurer la tenue des deux demi-­ferrites après assemblage, on dispose sur le produit bobiné 1 une pastille silicone 1A servant d'amortisseur.For the convenience of the implementation of the method, and in particular to be able to keep in place the balls and the glue dots, one has on a movable support S one of the half-ferrites, for example the half-ferrite 2, which will be the lower half-ferrite, so that its air gap plane 4 (that is to say its planar face which is opposite the plane face of the other half-ferrite, and between which the air gap is defined) is horizontal. The coil 1 is put in place on the ferrite 2. In order to ensure the holding of the two half-ferrites after assembly, there is on the wound product 1 a silicone pad 1A serving as a shock absorber.

On dépose ensuite sur le plan d'entrefer deux points de colle appropriée du type classique à prise rapide 5, 6. Dans le cas où les ferrites sont en forme de "U" ou de "E", on dépose chaque point de colle sensiblement au centre de la face supérieure (qui se trouve dans le plan d'entrefer) de chaque jambe du "U". Dans le cas où les ferrites sont en forme de "pot" (c'est-à-dire de cylindre fermé à une extrémité), les points de colle sont déposés diamétralement opposés, au milieu de la largeur de la couronne que forme la face supérieure du ferrite inférieur.Next, place on the air gap two points of suitable adhesive of the conventional quick-setting type 5, 6. In the case where the ferrites are in the shape of a "U" or "E", each point of adhesive is deposited substantially in the center of the upper face (which is in the air gap) of each leg of the "U". In the case where the ferrites are in the form of a "pot" (that is to say a cylinder closed at one end), the glue points are deposited diametrically opposite, in the middle of the width of the crown formed by the face upper of the lower ferrite.

Ensuite, on dépose une bille en plomb 7, 8 au milieu de chaque point de colle 4, 5. Ces billes ont par exemple la forme de sphères d'un diamètre de 1,2mm environ. Le diamètre de ces billes est légèrement supérieur, d'environ 0,5 à 1 mm, à la valeur maximale que peut avoir l'épaisseur de l'entrefer des bobines réglées (valeur maximale déterminée expérimentalement sur une grande série de bobines).Then, a lead ball 7, 8 is placed in the middle of each point of glue 4, 5. These balls have, for example, the shape of spheres with a diameter of approximately 1.2 mm. The diameter of these balls is slightly greater, about 0.5 to 1 mm, than the maximum value that the thickness of the air gap of the regulated coils can have (maximum value determined experimentally on a large series of coils).

On met ensuite en place le demi-ferrite 3 auquel on applique une légère pression qui sera maintenue jusqu'à la fin de la polyméri­sation de la colle. Cette faible pression p (quelques centaines de grammes) est exercée par l'intermédiaire d'un cadre 9 venant coiffer le ferrite 3. Ce cadre 9, guidé (de façon non représentée) par rapport au support S, sert également à bien positionner le ferrite 3 par rapport au ferrite 2, et à maintenir en place le ferrite 3 jusqu'à la fin du collage. La pression p peut être simplement due au poids propre du cadre 9, ou bien être exercée, en plus de ce poids, par un ressort.Then put in place the half-ferrite 3 to which a light pressure is applied which will be maintained until the end of the polymerization of the adhesive. This low pressure p (a few hundred grams) is exerted via a frame 9 which covers the ferrite 3. This frame 9, guided (not shown) relative to the support S, also serves to position the ferrite 3 relative to ferrite 2, and to hold ferrite 3 in place until the end of bonding. The pressure p may simply be due to the self-weight of the frame 9, or else be exerted, in addition to this weight, by a spring.

On procède ensuite au réglage de la self-inductance du produit constitué par le bobinage 1 et son circuit magnétique 2, 3. Ce réglage est réalisé en reliant les bornes de la bobine 1 à un appareil de mesure d'inductance classique (non représenté) et en appliquant au ferrite 3 une force F d'environ 60 kg au maximum par l'intermé­diaire d'un bloc 10 passant par l'ouverture centrale 11 du cadre 9 et appuyé sur la face supérieure du ferrite 3. Cette force F, progres­sive, écrase les billes 7, 8, et est appliquée tant que l'inductance désirée n'est pas atteinte, c'est-à-dire tant que l'entrefer entre les ferrites 2, 3 est supérieur à la valeur correspondant à ladite inductance désirée.Next, the self-inductance of the product constituted by the coil 1 and its magnetic circuit 2, 3 is adjusted. This adjustment is carried out by connecting the terminals of the coil 1 to a conventional inductance measuring device (not shown). and by applying to the ferrite 3 a force F of approximately 60 kg at most via a block 10 passing through the central opening 11 of the frame 9 and supported on the upper face of the ferrite 3. This force F, progressive , crushes the balls 7, 8, and is applied as long as the desired inductance is not reached, that is to say as long as the air gap between the ferrites 2, 3 is greater than the value corresponding to said inductance desired.

Dès que cette valeur d'inductance est atteinte, on remonte le bloc 10 tout en laissant en place le cadre 9. La faible pression exercée par ce cadre 9 ne permet pas d'écraser davantage les billes 7, 8, mais permet de maintenir le contact entre les ferrites 2, 3 et les billes 7, 8, et donc de garder la mémoire du réglage correct d'inductance pendant le temps de polymérisation des points de colle 5, 6. Pour augmenter la vitesse de réglage, on applique la force F en deux temps: d'abord une augmentation rapide jusqu'à l'obtention d'une valeur d'inductance proche de la valeur finale, puis une augmentation lente permettant le réglage fin d'inductance jusqu'à l'obtention de la valeur finale.As soon as this inductance value is reached, the block 10 is raised while leaving the frame in place 9. The low pressure exerted by this frame 9 does not allow the balls 7, 8 to be further crushed, but allows the contact between the ferrites 2, 3 and the balls 7, 8, and therefore to keep the memory of the correct inductance adjustment during the polymerization time of the glue dots 5, 6. To increase the adjustment speed, force is applied F in two stages: first a rapid increase until an inductance value close to the final value is reached, then a slow increase allowing fine adjustment of the inductance until the value is obtained final.

La colle utilisée est électriquement un bon isolant, mais, étant donné que sa polymérisation ne se fait qu'au bout d'un temps qui, bien que relativement court, est supérieur au temps de réglage de l'inductance de la bobine avec son circuit magnétique, la pression P induite par la force d'écrasement appliquée aux billes 7, 8 (qui sont simplement posées sur les points de colle 5, 6) chasse la colle dans les zones des calottes inférieure et supérieure de ces billes qui entrent en contact avec les surfaces d'entrefer des ferrites 2, 3. Ainsi, la continuïté électrique est assurée entre les ferrites 2, 3 via les billes 7, 8.The adhesive used is electrically a good insulator, but, since its polymerization takes place only after a time which, although relatively short, is greater than the time for adjusting the inductance of the coil with its circuit magnetic, the pressure P induced by the crushing force applied to the balls 7, 8 (which are simply placed on the glue dots 5, 6) drives out the glue in the areas of the lower and upper caps of these balls which come into contact with the gap surfaces of the ferrites 2, 3. Thus, the electrical continuity is ensured between the ferrites 2, 3 via the balls 7, 8.

Selon une caractéristique avantageuse de l'invention, on contrôle après le temps de polymérisation de la colle la continuïté électrique entre les ferrites 2, 3. Ainsi, s'il se produit un long arrêt de la chaîne de fabrication avant l'écrasement des billes 7, 8 et que la colle des points 7, 8 se polymérise entretemps au moins partiel­lement de façon à ne pas pouvoir être suffisamment chassée par l'écrasement des billes 7, 8 lors de la remise en fonctionnement de la chaîne, la rupture de continuïté électrique entre les ferrites ainsi produite est aussitôt détectée, et le produit bobiné défectueux (du point de vue de la continuïté électrique) peut être facilement repéré et réparé hors ligne de fabrication. Bien entendu, les éléments 9, 10, ne sont pas métalliques, et sont donc électriquement isolés du support S (si ce dernier est lui-même métallique).According to an advantageous characteristic of the invention, one checks after the adhesive polymerization time the electrical continuity between the ferrites 2, 3. Thus, if there is a long stop of the production line before the crushing of the balls 7, 8 and that the adhesive points 7 8 is at least partially polymerized in the meantime so that it cannot be sufficiently driven out by crushing the balls 7, 8 when the chain is put back into operation, the break in electrical continuity between the ferrites thus produced is immediately detected, and the defective wound product (from the point of view of electrical continuity) can be easily identified and repaired off the production line. Of course, the elements 9, 10 are not metallic, and are therefore electrically isolated from the support S (if the latter is itself metallic).

Claims (7)

1. Procédé de réglage automatique de self-inductance de produits bobinés comportant un circuit magnétique à entrefer ajus­table, caractérisé par le fait que l'on dépose sur le plan d'entrefer (4) du demi-circuit magnétique inférieur (2) muni de sa bobine (1) au moins deux points de colle (5, 6) à prise différée, puis au moins deux éléments d'entrefer (7, 8) en matériau relativement mou, amagné­tique et électriquement conducteur et à domaine élastique quasi-­nul, que l'on pose un demi-circuit magnétique (3) supérieur sur l'inférieur (2) en exerçant une faible pression (P) sur le demi-circuit magnétique supérieur, que l'on règle l'épaisseur de l'entrefer du circuit magnétique en contrôlant la valeur de la self-inductance du produit bobiné (1, 2, 3) et en écrasant les éléments d'entrefer, et que l'on maintient ladite faible pression pendant le temps de prise de la colle.1. Method for automatic self-inductance adjustment of wound products comprising an adjustable gap magnetic circuit, characterized in that the lower magnetic half-circuit (2) provided with its reel (1) at least two points of adhesive (5, 6) with deferred setting, then at least two air-gap elements (7, 8) made of relatively soft, non-magnetic and electrically conductive material and with almost zero elastic range, that a higher magnetic half-circuit (3) is placed on the lower (2) by exerting a low pressure (P) on the upper magnetic half-circuit, that the thickness of the air gap of the magnetic circuit by controlling the value of the self-inductance of the wound product (1, 2, 3) and by crushing the air-gap elements, and that said low pressure is maintained during the setting time of the adhesive. 2. Procédé selon la revendication 1, caractérisé par le fait que les éléments d'entrefer sont des billes.2. Method according to claim 1, characterized in that the air gap elements are balls. 3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que les éléments d'entrefer sont en plomb.3. Method according to claim 1 or 2, characterized in that the air gap elements are made of lead. 4. Procédé selon l'une des revendications précédentes, carac­térisé par le fait que ladite faible pression est exercée par un cadre (9) de positionnement du demi-circuit magnétique supérieur (3).4. Method according to one of the preceding claims, characterized in that said low pressure is exerted by a frame (9) for positioning the upper magnetic half-circuit (3). 5. Procédé selon l'une des revendications précédentes, carac­térisé par le fait que l'on contrôle la continuïté électrique du circuit magnétique, via les éléments d'entrefer, après la prise de la colle.5. Method according to one of the preceding claims, characterized in that the electrical continuity of the magnetic circuit is checked, via the air-gap elements, after the adhesive has set. 6. Procédé selon l'une des revendications précédentes, carac­térisé par le fait que l'écrasement des éléments d'entrefer est obtenu par une force progressivement croissante (F) appliquée sur le demi-circuit magnétique supérieur.6. Method according to one of the preceding claims, characterized in that the crushing of the air gap elements is obtained by a progressively increasing force (F) applied to the upper magnetic half-circuit. 7. Procédé selon la revendication 6, caractérisé par le fait que ladite force est appliquée en deux temps : un premier temps à augmentation rapide jusqu'à obtention d'une valeur de self-­inductance proche de la valeur finale, et un deuxième temps à augmentation lente jusqu'à obtention de la valeur finale de la self-­inductance.7. Method according to claim 6, characterized in that the said force is applied in two stages: a first stage with rapid increase until a self-inductance value close to the final value is obtained, and a second stage with slow increase until the final value of the self-inductance is obtained.
EP19880402401 1987-09-25 1988-09-23 Method for automatically controlling the self-inductance of wound elements comprising a magnetic circuit with an adjustable air gap Expired - Lifetime EP0309359B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8713288A FR2621167B1 (en) 1987-09-25 1987-09-25 METHOD OF AUTOMATICALLY ADJUSTING SELF-INDUCTANCE OF COIL ELEMENTS COMPRISING AN ADJUSTABLE GAP MAGNETIC CIRCUIT
FR8713288 1987-09-25

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Publication Number Publication Date
EP0309359A1 true EP0309359A1 (en) 1989-03-29
EP0309359B1 EP0309359B1 (en) 1993-09-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0729040A1 (en) * 1995-02-22 1996-08-28 Minnesota Mining And Manufacturing Company Ferrite core marker
EP0757364A2 (en) * 1995-08-01 1997-02-05 Deutsche Thomson-Brandt Gmbh Transformer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715323A1 (en) * 1994-12-01 1996-06-05 Vlt Corporation Setting inductance value of magnetic components
JP6450524B2 (en) * 2014-04-09 2019-01-09 株式会社タムラ製作所 Reactor and its manufacturing method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2100142A5 (en) * 1970-07-02 1972-03-17 Iskra Z Za Avtomatiz Adhesives fillers of controlled diam - to keep substates a given distance apart
GB2039156A (en) * 1978-11-29 1980-07-30 Hitachi Ltd Transformer
FR2457000A1 (en) * 1979-05-14 1980-12-12 Victor Company Of Japan Accurate gap setting for transducer core - inserting non-magnetic round wire to determine gap dimension

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5836488B2 (en) * 1975-03-17 1983-08-09 日本電信電話株式会社 Senrinkumitatehohou
JPS54127569A (en) * 1978-03-28 1979-10-03 Matsushita Electric Works Ltd Discharge lamp ballast
JPS5749378U (en) * 1980-09-08 1982-03-19
JPS60263412A (en) * 1984-06-12 1985-12-26 Matsushita Electric Ind Co Ltd Flyback transformer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2100142A5 (en) * 1970-07-02 1972-03-17 Iskra Z Za Avtomatiz Adhesives fillers of controlled diam - to keep substates a given distance apart
GB2039156A (en) * 1978-11-29 1980-07-30 Hitachi Ltd Transformer
FR2457000A1 (en) * 1979-05-14 1980-12-12 Victor Company Of Japan Accurate gap setting for transducer core - inserting non-magnetic round wire to determine gap dimension

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0729040A1 (en) * 1995-02-22 1996-08-28 Minnesota Mining And Manufacturing Company Ferrite core marker
US5767816A (en) * 1995-02-22 1998-06-16 Minnesota Mining And Manufacturing Company Ferrite core marker
EP0757364A2 (en) * 1995-08-01 1997-02-05 Deutsche Thomson-Brandt Gmbh Transformer
EP0757364A3 (en) * 1995-08-01 1997-03-26 Deutsche Thomson-Brandt Gmbh Transformer

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EP0309359B1 (en) 1993-09-01
DE3883677T2 (en) 1994-03-24
DE3883677D1 (en) 1993-10-07
ES2042787T3 (en) 1993-12-16
TR24086A (en) 1991-03-04
JPH01107505A (en) 1989-04-25
FR2621167B1 (en) 1994-05-20
JP3107801B2 (en) 2000-11-13
FR2621167A1 (en) 1989-03-31

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