EP0436434A1 - Toroidal transformer - Google Patents

Toroidal transformer Download PDF

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Publication number
EP0436434A1
EP0436434A1 EP90403761A EP90403761A EP0436434A1 EP 0436434 A1 EP0436434 A1 EP 0436434A1 EP 90403761 A EP90403761 A EP 90403761A EP 90403761 A EP90403761 A EP 90403761A EP 0436434 A1 EP0436434 A1 EP 0436434A1
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EP
European Patent Office
Prior art keywords
strip
ring
transformer
carcass
transformer according
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.)
Withdrawn
Application number
EP90403761A
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German (de)
French (fr)
Inventor
Jean-Claude Beisser
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Individual
Original Assignee
Individual
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Publication date
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Publication of EP0436434A1 publication Critical patent/EP0436434A1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
    • H01F41/022—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) by winding the strips or ribbons around a coil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • 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
    • H01F27/2847—Sheets; Strips
    • 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
    • H01F27/2847—Sheets; Strips
    • H01F27/2852—Construction of conductive connections, of leads
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/16—Toroidal transformers
    • 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
    • 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
    • H01F27/2847—Sheets; Strips
    • H01F2027/2857—Coil formed from wound foil conductor
    • 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
    • H01F27/2847—Sheets; Strips
    • H01F2027/2861—Coil formed by folding a blank

Definitions

  • the present invention relates to a transformer, and especially a thin toroidal type transformer.
  • Transformers of this type consist of an O-ring of magnetic material around which are arranged one or more primary windings and one or more secondary windings.
  • the windings are made around a carcass, made of an insulating material, generally in two parts, arranged around the torus, on which there is wound an insulated conductive wire, of section appropriate to the intensity of the current it is intended to deliver.
  • This type of transformer is difficult to manufacture due to the problems posed by the realization of the series of windings around the toroid.
  • the windings are usually made by automatic machines, but these machines, in addition to their complexity and their high cost price, are difficult to use for windings of large diameter wires. In addition, these machines require a relatively large central opening of the torus.
  • the present invention aims to simplify the manufacture of high efficiency toroidal transformers, provided with a secondary intended to be traversed by currents of high intensity, and having various outputs allowing to have multiple operating voltages.
  • the present invention relates to a toroidal type transformer comprising a ring-shaped magnetic circuit consisting of a series of windings of a strip of magnetic sheet metal, around which are arranged at least one primary winding and at least one winding. secondary, characterized in that each of the primary and secondary windings is disposed around a carcass of insulating material, surrounding the ring, this carcass being provided on its internal face with guide means intended to come into contact with the internal face of the strip constituting the ring.
  • Figure 1 is a top view in partial section of a transformer according to the invention.
  • Figure 2 is a perspective view of a foldable element intended to constitute a winding carcass.
  • FIG. 3 is a perspective view of a winding carcass made up of the foldable element of FIG. 2.
  • Figures 4a, 4b and 4c show details of implementation of a winding carcass according to the invention.
  • FIG. 5 is a perspective view of an embodiment of a transformer secondary according to the invention.
  • Figures 6 and 6a are two views in partial section, along the line VI-VI of Figure 1, of two variants of a winding carcass.
  • Figure 7 is a plan view of an element constituting the secondary winding.
  • Figure 8 is a partial top view of several elements shown in Figure 7 once assembled.
  • Figure 9 is a cross-sectional and vertical view of an electrical connection mode of a conductive wire on the secondary of the transformer.
  • FIG. 10 is a perspective view of a detail of embodiment of FIG. 9.
  • Figure 11 is a top view of the device used to implement the magnetic circuit of the transformer inside the winding carcasses.
  • a toroidal transformer 1 essentially consists of a magnetic circuit of substantially toroidal shape 3, a primary comprising two windings 5.5 ′ and a secondary comprising two windings 7.7 ′.
  • the magnetic circuit 3 consists of a strip 4 of magnetic material, such as for example a sheet of silicon, wound on itself so as to constitute a ring.
  • the two primary windings 5.5 ′ are made up each of a carcass 9, made of an insulating material, such as a plastic material, on which are wound turns 11 of conductive wires provided, on their periphery, with an electrical insulator.
  • the carcass 9 is in the form of a parallelepipedal box open on two of its opposite faces 10,10 'and the distance between its two main walls 15,17 parallel to the plane of the magnetic circuit 3 is slightly greater than the height thereof, by so that the housing 9 can surround the magnetic circuit.
  • the two windings 5.5 ′, as shown in FIG. 1, are arranged symmetrically with respect to a plane passing through the center of the ring 3.
  • the housing 9 is obtained by folding an element 9 ′, manufactured by molding, and having, as shown in FIG. 2, at the location of the folds, recesses 13 in the form of a V.
  • Two of the faces 15 and 17 of this element 9 ′ which, after folding, will respectively constitute the lower and upper main walls of the housing 9, are provided with a boss of rectangular cross section 19, 19 ′ and in the form of an arc of a circle of radius r, of the same order of magnitude as the internal radius of the magnetic circuit 3.
  • the two bosses 19, 19 ′, before the folding of the element 9 ′ have their respective concavities oriented opposite one another, so that, after folding, the two circular bosses 19, 19 ′ are superimposed.
  • bosses 19,19 ' are pierced with a series of holes, respectively 21,23, aligned, after folding of the element 9', on the same vertical yy '( Figure 6), and are distributed regularly along the circular bosses 19.19 '.
  • the entry of the holes 23 of the boss 19 ' involves milling 25 to 120 °.
  • Rollers 27 are used to guide the strip 4 constituting the core inside the housing 9, during the positioning of the latter, as will be explained below.
  • These rollers 27 have two end studs 29 and a cylindrical central part 31 whose diameter is such that when the two studs 29 are in place in the holes 21, 23, the central part 31 of the roller 27 protrudes towards the inside of the carcass 9 the bosses 19.19 '.
  • the windings 7, 7 'constituting the secondary are arranged diametrically opposite along an axis xx' perpendicular to the axis zz 'of the two primary windings.
  • the transformer secondary consists of massive elements, connected to each other so as to obtain electrical continuity.
  • each element thus consists of a rectangular plate 35 provided with a rectangular central recess 37, the length and width of which correspond respectively to the width and to the height of the housing 9.
  • Each of the plates 35 has a transverse notch 41 connecting the central recess 37 to the outside and making it possible to fold the upper part 43 of a plate on one side and the lower part 45 of this same plate on the other side, so as to join the upper part 43 of a given plate to the lower part 45 of an adjacent plate.
  • the connection between the plates 35 can be achieved for example by welding and all of the plates 35 thus constitutes a winding.
  • the secondary of the transformer is thus constituted, in the present embodiment, of two identical windings 7 and 7 'joined by a conductive plate 8.
  • the length of the conductive plate 8 is substantially of the same value as that of the carcasses 9, so that each winding constituting the secondary of the transformer can be around the magnetic circuit 3, diametrically opposite along an axis xx 'perpendicular to the axis zz' of the two primary windings.
  • the various constituent elements of the latter take place in a housing 50, and the external ends 51 of the plates 35 constituting the secondary of the transformer are maintained at a given deviation e from one another by an insulating member 52 provided with vertical slots within which take up each of the outer ends 51 of the wafers 35.
  • the two windings 7, 7 'constituting the secondary of the transformer can be produced in a single piece, for example by molding. This latter mode of implementation being particularly advantageous as regards the cost price of the transformer.
  • the plates 35 constituting the secondary are not coated with insulation, the dielectric being constituted, in the present case by air, and the distance e separating two adjacent plates 35 will be determined in a known manner. of the tension between them.
  • the next secondary embodiment the invention makes it possible to produce, in a simple manner, multiple mid-points, or points for sampling multiple voltages, by simply extending the plates 35 of a length towards the outside of the transformer allowing an electrical connection to be made.
  • FIGS. 9 and 10 It is possible, for example, as shown in FIGS. 9 and 10, to use means for tightening the conductive wires 80 which are self-locking.
  • These means consist of a clamping nut 70 traversed by a central threaded hole 72 and comprising a transverse slot 76 extending, in the direction of the axis of the hole 72, over part of the thickness of the nut 70 , so as to give it a certain flexibility.
  • the base of the nut 70 is hollowed out by two transverse grooves 78 of thickness less than the diameter of the electric cables 80 to be connected to the transformer.
  • a screw 84 on which a tightening washer 86 is threaded passes through a slot 88 provided on the edge 51 of the plate 35 and is screwed into the threaded hole 72 of the clamping nut 70.
  • the conducting wires 80 intended to ensure the electrical connection of an installation with the transformer, take place in the grooves 78, existing between the clamping nut 70 and the plate 35.
  • the screw 84 is tightened the conducting wires 80 being thicker than the depth of the groove 78 the bottom of the nut 70 is not in contact with the plate 35 and, during tightening, the two parts of the nut 70 situated on either side of the transverse groove 76 deform and tighten against the screw 84, thus achieving braking of the latter and preventing any accidental unscrewing.
  • the guide means may consist of simple circular bosses 20, 20 ′ provided inside the upper 17 and lower 15 faces of the housing 9.
  • Element 9 ′ shown in FIG. 2, is used for this, on which the pins 29 of the guide rollers 27 are placed in the holes 21 provided in the circular boss 19, and the part 17 of said element is folded back. 9 'so that the holes 23 of the bosses 19' take their place around the opposite stud 29 'of the rollers 27, the chamfers 25 at 120 ° provided in the holes 23 allowing the part 17 to be folded down. appropriate means, the two free ends of this element, it being understood that such a fixing is temporary, since the conducting wires 11 once wound on the housings 9 will ensure the maintenance thereof.
  • the strip 4 Before its installation, the strip 4 is wound on a hub of radius r equal to the internal radius of the magnetic circuit of the transformer, then it is annealed at around 800 ° C. After this annealing operation, the strip is ready to be placed inside the housings 9.
  • the device shown in FIG. 11 which consists of the stand 81 receiving a hub 82, movable in rotation about a central axis, on which the previously annealed magnetic strip 4 is wound, and which one wishes to introduce.
  • the four housings 9 and a drive system composed of four rollers A, B, C, D one of which, the roller A, can be rotated in the direction of the arrow F by a motor, not shown in the drawing, and another, the roller D, is movable in translation under the action of elastic means 90.
  • a thin and flexible driving strap 92, or a belt, is introduced inside the three upper casings 9, namely the housings 9a, 9b, 9c, and is wound against the four rollers C, D, A, B , this strip being fixed on itself, by means not shown in the drawing, so as to constitute an endless loop maintained under tension by the tension roller D under the action of the tension spring 90.
  • the end of the strip exiting the casing 9d is fixed by any suitable means the part of the strip entering the housing 9a and the drive strip 92 is again rotated so as to introduce inside the four housings 9a, 9b, 9c and 9d the desired number of turns of the strip 4 of way to constitute the magnetic circuit 3.
  • the radius of the hub 82 is close to the outside radius r ′ of the magnetic circuit 3 once it is finished.
  • toroidal type transformers using a primary winding and a superposed secondary winding and, in this case, in order to facilitate the positioning of the magnetic strip inside the windings, three additional housings are used 9 , arranged as above, and intended to guide the strip during its installation.
  • the three additional boxes 9 are removed after the positioning in the primary and secondary of the forming hole of the magnetic strip 4.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

The transformer (1) includes a magnetic circuit with a ring shape (3) supporting primary (5,5') and secondary coils (7,7'). The magnetic circuit is made of a magnetic sheet rolled on to form the ring. The primary coils are wound on an insulating shell (9) with rectangular shape that surrounds the magnetic ring. The secondary coils are placed opposite the primary coils and interconnected by a conducting plate (8). The transformer is placed inside a casing (50).

Description

La présente invention concerne, un transformateur, et spécialement un transformateur de type torique de faible épaisseur.The present invention relates to a transformer, and especially a thin toroidal type transformer.

Les transformateurs de ce type sont constitués d'un noyau torique en matériau magnétique autour duquel sont disposés un ou plusieurs enroulements primaires et un ou plusieurs enroulements secondaires. Habituellement les enroulements sont réalisés autour d'une carcasse, faite d'un matériau isolant, généralement en deux parties, disposée autour du tore, sur laquelle on vient enrouler un fil conducteur isolé, de section appropriée à l'intensité du courant qu'il est destiné à délivrer.Transformers of this type consist of an O-ring of magnetic material around which are arranged one or more primary windings and one or more secondary windings. Usually the windings are made around a carcass, made of an insulating material, generally in two parts, arranged around the torus, on which there is wound an insulated conductive wire, of section appropriate to the intensity of the current it is intended to deliver.

Ce type de transformateur est difficile à fabriquer en raison des problèmes posés par la réalisation de la série d'enroulements autour du tore. Les enroulements sont habituellement réalisés par des machines automatiques, mais ces machines, outre leur complexité et leur prix de revient élevé, sont difficilement utilisables pour des enroulements de fils de fort diamètre. De plus ces machines nécessitent une ouverture centrale du tore relativement importante.This type of transformer is difficult to manufacture due to the problems posed by the realization of the series of windings around the toroid. The windings are usually made by automatic machines, but these machines, in addition to their complexity and their high cost price, are difficult to use for windings of large diameter wires. In addition, these machines require a relatively large central opening of the torus.

C'est pourquoi on a proposé de réaliser le tore en deux parties, en forme de C, sur lesquelles on vient enfiler les bobinages primaires et secondaires préalablement enroulés sur des carcasses isolantes. Les deux parties en forme de C sont ensuite assemblées de façon à reconstituer le tore. On obtient ainsi des transformateurs dont le coût de fabrication est réduit de façon substantielle, mais qui possèdent un entrefer provoquant des pertes magnétiques faisant chuter de façon importante leur rendement.This is why it has been proposed to produce the torus in two parts, in the form of a C, on which the primary and secondary windings previously wound on insulating carcasses are threaded. The two C-shaped parts are then assembled so as to reconstitute the torus. Transformers are thus obtained whose manufacturing cost is reduced substantially, but which have an air gap causing magnetic losses causing their efficiency to drop significantly.

D'autre part, il est difficile et onéreux de prévoir, dans ce type de transformateur, des points milieu, ou d'autres branchements permettant de prélever des tensions partielles de la tension nominale fournie en sortie du secondaire, puisque ces points milieu nécessitent la réalisation de connexions électriques annexes sur les spires du bobinage secondaire.On the other hand, it is difficult and expensive to predict, in this type of transformer, midpoints, or other connections making it possible to take partial voltages from the nominal voltage supplied at the output of the secondary, since these midpoints require the making of additional electrical connections on the turns of the secondary winding.

La présente invention a pour but de simplifier la fabrication des transformateurs toriques à haut rendement, pourvus d'un secondaire destiné à être parcouru par des courants d'intensité élevée, et possédant diverses sorties permettant de disposer de tensions d'utilisation multiples.The present invention aims to simplify the manufacture of high efficiency toroidal transformers, provided with a secondary intended to be traversed by currents of high intensity, and having various outputs allowing to have multiple operating voltages.

La présente invention a pour objet un transformateur de type torique comprenant un circuit magnétique en forme d'anneau constitué d'une série d'enroulements d'un feuillard en tôle magnétique, autour duquel sont disposés au moins un enroulement primaire et au moins un enroulement secondaire, caractérisé en ce que chacun des enroulements primaire et secondaire est disposé autour d'une carcasse en matériau isolant, entourant l'anneau, cette carcasse étant pourvue sur sa face interne de moyens de guidage destinés à venir en contact avec la face interne du feuillard constituant l'anneau.The present invention relates to a toroidal type transformer comprising a ring-shaped magnetic circuit consisting of a series of windings of a strip of magnetic sheet metal, around which are arranged at least one primary winding and at least one winding. secondary, characterized in that each of the primary and secondary windings is disposed around a carcass of insulating material, surrounding the ring, this carcass being provided on its internal face with guide means intended to come into contact with the internal face of the strip constituting the ring.

La figure 1 est une vue de dessus en coupe partielle d'un transformateur suivant l'invention.Figure 1 is a top view in partial section of a transformer according to the invention.

La figure 2 est une vue en perspective d'un élément pliable destiné à constituer une carcasse d'enroulement.Figure 2 is a perspective view of a foldable element intended to constitute a winding carcass.

La figure 3 est une vue en perspective d'une carcasse d'enroulement constituée de l'élément pliable de la figure 2.FIG. 3 is a perspective view of a winding carcass made up of the foldable element of FIG. 2.

Les figures 4a,4b et 4c montrent des détails de mise en oeuvre d'une carcasse d'enroulement suivant l'invention.Figures 4a, 4b and 4c show details of implementation of a winding carcass according to the invention.

La figure 5 est une vue en perspective d'un mode de réalisation d'un secondaire de transformateur suivant l'invention.FIG. 5 is a perspective view of an embodiment of a transformer secondary according to the invention.

Les figures 6 et 6a sont deux vues en coupe partielle, suivant la ligne VI-VI de la figure 1, de deux variantes d'une carcasse d'enroulement.Figures 6 and 6a are two views in partial section, along the line VI-VI of Figure 1, of two variants of a winding carcass.

La figure 7 est une vue en plan d'un élément constituant l'enroulement secondaire.Figure 7 is a plan view of an element constituting the secondary winding.

La figure 8 est une vue de dessus partielle de plusieurs éléments représentés sur la figure 7 une fois assemblés.Figure 8 is a partial top view of several elements shown in Figure 7 once assembled.

La figure 9 est une vue en coupe transversale et verticale d'un mode de connexion électrique d'un fil conducteur sur le secondaire du transformateur.Figure 9 is a cross-sectional and vertical view of an electrical connection mode of a conductive wire on the secondary of the transformer.

La figure 10 est une vue en perspective d'un détail de réalisation de la figure 9.FIG. 10 is a perspective view of a detail of embodiment of FIG. 9.

La figure 11 est une vue de dessus du dispositif mis en oeuvre pour réaliser la mise en place du circuit magnétique du transformateur à l'intérieur des carcasses d'enroulement.Figure 11 is a top view of the device used to implement the magnetic circuit of the transformer inside the winding carcasses.

Sur les figures 1 à 4 un transformateur torique 1 est essentiellement constitué d'un circuit magnétique de forme sensiblement torique 3, d'un primaire comprenant deux enroulements 5,5' et d'un secondaire comprenant deux enroulements 7,7'.In FIGS. 1 to 4 a toroidal transformer 1 essentially consists of a magnetic circuit of substantially toroidal shape 3, a primary comprising two windings 5.5 ′ and a secondary comprising two windings 7.7 ′.

Le circuit magnétique 3 est constitué d'un feuillard 4 en matériau magnétique, tel que par exemple une tôle au silicium, enroulé sur lui-même de façon à constituer un anneau.The magnetic circuit 3 consists of a strip 4 of magnetic material, such as for example a sheet of silicon, wound on itself so as to constitute a ring.

Les deux enroulements primaires 5,5' sont constitués chacun d'une carcasse 9, en un matériau isolant, tel qu'une matière plastique, sur laquelle sont enroulées des spires 11 de fils conducteurs pourvus, sur leur périphérie, d'un isolant électrique. La carcasse 9 est en forme de boîtier parallélépipédique ouvert sur deux de ses faces opposées 10,10' et la distance entre ses deux parois principales 15,17 parallèles au plan du circuit magnétique 3 est légèrement supérieure à la hauteur de celui-ci, de façon que le boîtier 9 puisse entourer le circuit magnétique. Les deux enroulements 5,5', comme montré sur la figure 1, sont disposés symétriquement par rapport à un plan passant par le centre de l'anneau 3.The two primary windings 5.5 ′ are made up each of a carcass 9, made of an insulating material, such as a plastic material, on which are wound turns 11 of conductive wires provided, on their periphery, with an electrical insulator. The carcass 9 is in the form of a parallelepipedal box open on two of its opposite faces 10,10 'and the distance between its two main walls 15,17 parallel to the plane of the magnetic circuit 3 is slightly greater than the height thereof, by so that the housing 9 can surround the magnetic circuit. The two windings 5.5 ′, as shown in FIG. 1, are arranged symmetrically with respect to a plane passing through the center of the ring 3.

Le boîtier 9 est obtenu par pliage d'un élément 9', fabriqué par moulage, et présentant, comme représenté sur la figure 2, à l'endroit des pliures, des dégagements 13 en forme de V. Deux des faces 15 et 17 de cet élément 9' qui, après pliage, constitueront respectivement les parois principales inférieure et supérieure du boîtier 9, sont pourvues d'un bossage de section droite rectangulaire 19,19' et de forme en arc de cercle de rayon r, du même ordre de grandeur que le rayon interne du circuit magnétique 3. Les deux bossages 19,19', avant le pliage de l'élément 9', ont leurs concavités respectives orientées l'une en regard de l'autre, de façon que, après pliage, les deux bossages circulaires 19,19' se trouvent superposés. Ces deux bossages 19,19' sont percés d'une série de trous, respectivement 21,23, alignés, après pliage de l'élément 9', sur une même verticale yy' (figure 6), et sont répartis régulièrement le long des bossages circulaires 19,19'. Comme représenté sur les figures 4a et 4b l'entrée des trous 23 du bossage 19' comporte un fraisage 25 à 120°.The housing 9 is obtained by folding an element 9 ′, manufactured by molding, and having, as shown in FIG. 2, at the location of the folds, recesses 13 in the form of a V. Two of the faces 15 and 17 of this element 9 ′ which, after folding, will respectively constitute the lower and upper main walls of the housing 9, are provided with a boss of rectangular cross section 19, 19 ′ and in the form of an arc of a circle of radius r, of the same order of magnitude as the internal radius of the magnetic circuit 3. The two bosses 19, 19 ′, before the folding of the element 9 ′, have their respective concavities oriented opposite one another, so that, after folding, the two circular bosses 19, 19 ′ are superimposed. These two bosses 19,19 'are pierced with a series of holes, respectively 21,23, aligned, after folding of the element 9', on the same vertical yy '(Figure 6), and are distributed regularly along the circular bosses 19.19 '. As shown in Figures 4a and 4b the entry of the holes 23 of the boss 19 ' involves milling 25 to 120 °.

Des galets 27 sont utilisés pour assurer le guidage du feuillard 4 constituant le noyau à l'intérieur du boîtier 9, au cours de la mise en place de celui-ci, comme il sera précisé ci-après. Ces galets 27 comportent deux tétons extrêmes 29 et d'une partie centrale cylindrique 31 dont le diamètre est tel que lorsque les deux tétons 29 sont en place dans les trous 21,23, la partie centrale 31 du galet 27 dépasse vers l'intérieur de la carcasse 9 les bossages 19,19'.Rollers 27 are used to guide the strip 4 constituting the core inside the housing 9, during the positioning of the latter, as will be explained below. These rollers 27 have two end studs 29 and a cylindrical central part 31 whose diameter is such that when the two studs 29 are in place in the holes 21, 23, the central part 31 of the roller 27 protrudes towards the inside of the carcass 9 the bosses 19.19 '.

Les enroulements 7,7' constituant le secondaire sont disposés de façon diamétralement opposée suivant un axe xx' perpendiculaire à l'axe zz' des deux enroulements primaires.The windings 7, 7 'constituting the secondary are arranged diametrically opposite along an axis xx' perpendicular to the axis zz 'of the two primary windings.

Le secondaire du transformateur est constitué, d'éléments massifs, reliés les uns aux autres de façon à obtenir une continuité électrique. Comme représenté sur les figures 5 et 7 chaque élément est ainsi constitué d'une plaquette 35 rectangulaire pourvue d'un évidement central rectangulaire 37, dont la longueur et la largeur correspondent respectivement à la largeur et à la hauteur du boîtier 9.The transformer secondary consists of massive elements, connected to each other so as to obtain electrical continuity. As shown in FIGS. 5 and 7, each element thus consists of a rectangular plate 35 provided with a rectangular central recess 37, the length and width of which correspond respectively to the width and to the height of the housing 9.

Chacune des plaquettes 35 comporte une entaille transversale 41 reliant l'évidemment central 37 à l'extérieur et permettant de plier d'un côté la partie supérieure 43 d'une plaquette et de l'autre côté la partie inférieure 45 de cette même plaquette, de façon à réunir la partie supérieure 43 d'une plaquette donnée à la partie inférieure 45 d'une plaquette adjacente. La liaison entre les plaquettes 35 peut être réalisée par exemple par soudage et l'ensemble des plaquettes 35 constitue ainsi un enroulement.Each of the plates 35 has a transverse notch 41 connecting the central recess 37 to the outside and making it possible to fold the upper part 43 of a plate on one side and the lower part 45 of this same plate on the other side, so as to join the upper part 43 of a given plate to the lower part 45 of an adjacent plate. The connection between the plates 35 can be achieved for example by welding and all of the plates 35 thus constitutes a winding.

Le secondaire du transformateur est ainsi constitué, dans la présente réalisation, de deux enroulements identiques 7 et 7' réunis par une plaque conductrice 8. La longueur de la plaque conductrice 8 est sensiblement de même valeur que celle des carcasses 9, de façon que chaque enroulement constituant le secondaire du transformateur puisse se trouver autour du circuit magnétique 3, de façon diamétralement opposée suivant un axe xx' perpendiculaire à l'axe zz' des deux enroulements primaires.The secondary of the transformer is thus constituted, in the present embodiment, of two identical windings 7 and 7 'joined by a conductive plate 8. The length of the conductive plate 8 is substantially of the same value as that of the carcasses 9, so that each winding constituting the secondary of the transformer can be around the magnetic circuit 3, diametrically opposite along an axis xx 'perpendicular to the axis zz' of the two primary windings.

L'assemblage du transformateur étant réalisé, suivant un procédé de mise en oeuvre qui sera décrit ci-après, les différents éléments constitutifs de celui-ci prennent place dans un boîtier 50, et les extrémités externes 51 des plaquettes 35 constituant le secondaire du transformateur sont maintenues à un écart donné e l'une de l'autre par un élément isolant 52 pourvu de fentes verticales, à l'intérieur desquelles prennent place chacune des extrémités externes 51 des plaquettes 35.The assembly of the transformer being carried out, according to an implementation process which will be described below, the various constituent elements of the latter take place in a housing 50, and the external ends 51 of the plates 35 constituting the secondary of the transformer are maintained at a given deviation e from one another by an insulating member 52 provided with vertical slots within which take up each of the outer ends 51 of the wafers 35.

Les deux enroulements 7,7' constituant le secondaire du transformateur peuvent être réalisés en une seule pièce, par exemple par moulage. Ce dernier mode de mise en oeuvre étant particulièrement intéressant en ce qui concerne le prix de revient du transformateur.The two windings 7, 7 'constituting the secondary of the transformer can be produced in a single piece, for example by molding. This latter mode of implementation being particularly advantageous as regards the cost price of the transformer.

Suivant la présente invention les plaquettes 35 constituant le secondaire ne sont pas revêtues d'isolant, le diélectrique étant constitué, dans le cas présent par l'air, et l'on déterminera de façon connue la distance e séparant deux plaques 35 adjacentes en fonction de la tension existant entre celles-ci.According to the present invention, the plates 35 constituting the secondary are not coated with insulation, the dielectric being constituted, in the present case by air, and the distance e separating two adjacent plates 35 will be determined in a known manner. of the tension between them.

La forme de réalisation du secondaire suivant l'invention permet de réaliser, de façon simple, de multiples points milieu, ou points de prélèvement de tensions multiples, en prolongeant simplement vers l'extérieur du transformateur les plaquettes 35 d'une longueur permettant d'opérer une connexion électrique.The next secondary embodiment the invention makes it possible to produce, in a simple manner, multiple mid-points, or points for sampling multiple voltages, by simply extending the plates 35 of a length towards the outside of the transformer allowing an electrical connection to be made.

Suivant le nombre de tensions différentes disponibles aux bornes du secondaire on peut ainsi prolonger quelques unes, ou la totalité des plaquettes 35. Cette connexion entre les fils conducteurs et les extrémités des plaques 35 destinées à la connexion peut être réalisée par tout moyen connu.Depending on the number of different voltages available at the secondary terminals, it is thus possible to extend some or all of the plates 35. This connection between the conductive wires and the ends of the plates 35 intended for connection can be made by any known means.

On peut par exemple, comme représenté sur les figures 9 et 10, utiliser des moyens de serrage des fils conducteurs 80 qui soient autobloquants. Ces moyens se composent d'une noix de serrage 70 traversée par un trou fileté central 72 et comportant une fente transversale 76 s'étendant, dans le sens de l'axe du trou 72, sur une partie de l'épaisseur de la noix 70, de façon à conférer à celle-ci une certaine flexibilité. La base de la noix 70 est creusée de deux rainures transversales 78 d'épaisseur inférieure au diamètre des câbles électriques 80 à connecter au transformateur. Une vis 84 sur laquelle est enfilée une rondelle de serrage 86 traverse une fente 88 prévue sur le bord 51 de la plaquette 35 et vient se visser dans le trou fileté 72 de la noix de serrage 70. Les fils conducteurs 80, destinés à assurer la connexion électrique d'une installation avec le transformateur, prennent place dans les rainures 78, existant entre la noix de serrage 70 et la plaquette 35. Lorsque l'on serre la vis 84 les fils conducteurs 80 étant plus épais que la profondeur de la rainure 78 le fond de la noix 70 n'est pas en contact avec la plaquette 35 et, au cours du serrage, les deux parties de la noix 70 située de part et d'autre de la rainure transversale 76 se déforment et se serrent contre la vis 84, réalisant ainsi un freinage de celle-ci et prévenant tout dévissage accidentel.It is possible, for example, as shown in FIGS. 9 and 10, to use means for tightening the conductive wires 80 which are self-locking. These means consist of a clamping nut 70 traversed by a central threaded hole 72 and comprising a transverse slot 76 extending, in the direction of the axis of the hole 72, over part of the thickness of the nut 70 , so as to give it a certain flexibility. The base of the nut 70 is hollowed out by two transverse grooves 78 of thickness less than the diameter of the electric cables 80 to be connected to the transformer. A screw 84 on which a tightening washer 86 is threaded passes through a slot 88 provided on the edge 51 of the plate 35 and is screwed into the threaded hole 72 of the clamping nut 70. The conducting wires 80, intended to ensure the electrical connection of an installation with the transformer, take place in the grooves 78, existing between the clamping nut 70 and the plate 35. When the screw 84 is tightened the conducting wires 80 being thicker than the depth of the groove 78 the bottom of the nut 70 is not in contact with the plate 35 and, during tightening, the two parts of the nut 70 situated on either side of the transverse groove 76 deform and tighten against the screw 84, thus achieving braking of the latter and preventing any accidental unscrewing.

Bien évidemment, et comme représenté sur la figure 6a les moyens de guidage peuvent être constitués de simples bossages circulaires 20,20' prévus à l'intérieur des faces supérieure 17 et inférieure 15 du boîtier 9.Obviously, and as shown in FIG. 6a, the guide means may consist of simple circular bosses 20, 20 ′ provided inside the upper 17 and lower 15 faces of the housing 9.

Pour réaliser le transformateur suivant l'invention on réalise tout d'abord les boîtiers 9 qui servent de support aux deux enroulements 5 et 5' constituant le primaire du transformateur. On utilise pour cela l'élément 9', représenté à la figure 2, sur lequel on met en place, dans les trous 21 prévus dans le bossage circulaire 19 les tétons 29 des galets de guidage 27, et on replie la partie 17 dudit élément 9' de façon que les trous 23 des bossages 19' viennent prendre place autour du téton opposé 29' des galets 27, les chanfreins 25 à 120° prévus dans les trous 23 permettant le rabattage de la partie 17. On fixe alors, par tout moyen approprié, les deux extrémités libres de cet élément, étant entendu qu'une telle fixation est provisoire, puisque les fils conducteurs 11 une fois bobinés sur les boîtiers 9 assureront le maintien de celui-ci.To make the transformer according to the invention, first of all the housings 9 which serve as support for the two windings 5 and 5 ′ constituting the primary of the transformer. Element 9 ′, shown in FIG. 2, is used for this, on which the pins 29 of the guide rollers 27 are placed in the holes 21 provided in the circular boss 19, and the part 17 of said element is folded back. 9 'so that the holes 23 of the bosses 19' take their place around the opposite stud 29 'of the rollers 27, the chamfers 25 at 120 ° provided in the holes 23 allowing the part 17 to be folded down. appropriate means, the two free ends of this element, it being understood that such a fixing is temporary, since the conducting wires 11 once wound on the housings 9 will ensure the maintenance thereof.

On bobine ensuite sur les boîtiers 9 le nombre de spires de fil électrique 11 voulu, dépendant de la tension admise par le transformateur. On fixe ensuite, par tout moyen approprié non représenté sur le dessin, l'un par rapport à l'autre les deux enroulements constituant le primaire du transformateur sur une platine 81 en les disposant suivant un axe zz'. De même, on met en place à l'intérieur des évidemments 37 de chacune des deux séries de plaquettes 35 constituant les deux enroulements du secondaire du transformateur, deux boîtiers 9, et l'on fixe l'ensemble suivant un axe xx', perpendiculaire à l'axe zz' des enroulements primaires. Il reste enfin à introduire le feuillard magnétique 4 à l'intérieur des quatre boîtiers 9 de façon à constituer le circuit magnétique.Then wound on the boxes 9 the number of turns of electrical wire 11 desired, depending on the voltage admitted by the transformer. Then fixed by any suitable means not shown in the drawing, relative to each other the two windings constituting the primary of the transformer on a plate 81 by arranging them in a axis zz '. Likewise, inside the recesses 37 of each of the two series of plates 35 constituting the two windings of the transformer secondary, two housings 9 are put in place, and the assembly is fixed along an axis xx ', perpendicular to the axis zz 'of the primary windings. Finally, it remains to introduce the magnetic strip 4 inside the four boxes 9 so as to constitute the magnetic circuit.

Avant sa mise en place, le feuillard 4 est enroulé sur un moyeu de rayon r égal au rayon intérieur du circuit magnétique du transformateur, puis il subit un recuit vers 800°C. Après cette opération de recuit le feuillard est prêt à être mis en place à l'intérieur des boîtiers 9.Before its installation, the strip 4 is wound on a hub of radius r equal to the internal radius of the magnetic circuit of the transformer, then it is annealed at around 800 ° C. After this annealing operation, the strip is ready to be placed inside the housings 9.

Pour cela on utilise le dispositif représenté sur la figure 11 qui se compose du statif 81 recevant un moyeu 82, mobile en rotation autour d'un axe central, sur lequel est enroulé le feuillard magnétique 4 précédemment recuit, et que l'on souhaite introduire dans les quatre boîtiers 9, et un système d'entraînement composé de quatre galets A,B,C,D dont l'un, le galet A, peut être entraîné en rotation dans le sens de la flèche F par un moteur, non représenté sur le dessin, et un autre, le galet D, est mobile en translation sous l'action de moyens élastique 90.For this, the device shown in FIG. 11 is used, which consists of the stand 81 receiving a hub 82, movable in rotation about a central axis, on which the previously annealed magnetic strip 4 is wound, and which one wishes to introduce. in the four housings 9, and a drive system composed of four rollers A, B, C, D one of which, the roller A, can be rotated in the direction of the arrow F by a motor, not shown in the drawing, and another, the roller D, is movable in translation under the action of elastic means 90.

Un feuillard d'entraînement mince et souple 92, ou une courroie, est introduit à l'intérieur des trois boîtiers 9 supérieurs, à savoir les boîtiers 9a,9b,9c, et est enroulé contre les quatre galets C,D,A,B, ce feuillard étant fixé sur lui-même, par des moyens non représentés sur le dessin, de façon à constituer une boucle sans fin maintenue sous tension par le galet tendeur D sous l'action du ressort de tension 90.A thin and flexible driving strap 92, or a belt, is introduced inside the three upper casings 9, namely the housings 9a, 9b, 9c, and is wound against the four rollers C, D, A, B , this strip being fixed on itself, by means not shown in the drawing, so as to constitute an endless loop maintained under tension by the tension roller D under the action of the tension spring 90.

Pour introduire le feuillard 4 en tôle magnétique à l'intérieur des boîtiers 9, on présente celui-ci entre le feuillard d'entraînement 92 et les galets 27 du boîtier 9a, et on met en route le moteur d'entraînement actionnant le galet A. Sous la pression du feuillard d'entraînement 92 le feuillard 4 en tôle magnétique est entraîné par frottement à l'intérieur des trois boîtiers 9a,9b et 9c et, en raison de la courbure qu'il a acquise au cours de l'opération de recuit, suit une courbure sensiblement circulaire et pénètre dans le quatrième boîtier 9d, où il est appliqué par élasticité contre les galets 27. A la sortie du boîtier 9d on fixe, par tout moyen approprié l'extrémité du feuillard sortant du boîtier 9d sur la partie du feuillard entrant dans le boîtier 9a et l'on fait de nouveau tourner le feuillard d'entraînement 92 de façon à introduire à l'intérieur des quatre boîtiers 9a,9b,9c et 9d le nombre de spires souhaitées du feuillard 4 de façon à constituer le circuit magnétique 3.To introduce the strip 4 made of magnetic sheet inside the housings 9, this is presented between the drive strip 92 and the rollers 27 of the housing 9a, and the drive motor activating the roller A is started. Under the pressure of the drive strip 92 the strip 4 made of magnetic sheet is driven by friction inside the three housings 9a, 9b and 9c and, because of the curvature which it has acquired during the operation. annealing, follows a substantially circular curvature and enters the fourth casing 9d, where it is applied by elasticity against the rollers 27. At the outlet of the casing 9d, the end of the strip exiting the casing 9d is fixed by any suitable means the part of the strip entering the housing 9a and the drive strip 92 is again rotated so as to introduce inside the four housings 9a, 9b, 9c and 9d the desired number of turns of the strip 4 of way to constitute the magnetic circuit 3.

L'extrémité libre du feuillard 4 en tôle magnétique est alors solidarisée des spires déjà réalisées, et l'on met ensuite en place l'ensemble de ces éléments dans un boîtier 50, comme représenté sur la figure 1.The free end of the strip 4 made of magnetic sheet is then secured to the turns already made, and all of these elements are then placed in a housing 50, as shown in FIG. 1.

Afin de ne soumettre le feuillard 4 qu'à un minimum de contraintes mécaniques et ainsi de lui conserver toutes ses propriétés magnétiques, le rayon du moyeu 82 est voisin du rayon extérieur r' du circuit magnétique 3 une fois terminé.In order to submit the strip 4 only to a minimum of mechanical stresses and thus to retain all of its magnetic properties, the radius of the hub 82 is close to the outside radius r ′ of the magnetic circuit 3 once it is finished.

On peut bien évidemment, selon le procédé suivant l'invention réaliser des transformateurs mettant en oeuvre un nombre différent de boîtiers 9.It is obviously possible, according to the method according to the invention, to make transformers using a different number of housings 9.

On peut par exemple réaliser des transformateurs de type torique utilisant un enroulement primaire et un enroulement secondaire superposés et, dans ce cas, afin de faciliter la mise en place du feuillard magnétique à l'intérieur des enroulements, on met en oeuvre trois boîtiers supplémentaires 9, disposés comme précédemment, et destinés à assurer le guidage du feuillard au cours de sa mise en place. Les trois boîtiers 9 supplémentaires sont ôtés après la mise en place dans le primaire et le secondaire du trous fomateur du feuillard magnétique 4.It is possible, for example, to produce toroidal type transformers using a primary winding and a superposed secondary winding and, in this case, in order to facilitate the positioning of the magnetic strip inside the windings, three additional housings are used 9 , arranged as above, and intended to guide the strip during its installation. The three additional boxes 9 are removed after the positioning in the primary and secondary of the forming hole of the magnetic strip 4.

Claims (20)

Transformateur de type torique comprenant un circuit magnétique en forme d'anneau (3) constitué d'une série d'enroulements d'un feuillard (4) en tôle magnétique, autour duquel sont disposés au moins un enroulement primaire et au moins un enroulement secondaire, caractérisé en ce que chacun des enroulements primaire et secondaire est disposé autour d'une carcasse (9) en matériau isolant, entourant l'anneau (3), cette carcasse (9) étant pourvue sur sa face interne de moyens de guidage (20,20',27) destinés à venir en contact avec la face interne du feuillard (4) constituant l'anneau.Toroidal type transformer comprising a ring-shaped magnetic circuit (3) consisting of a series of windings of a strip (4) made of magnetic sheet, around which are arranged at least one primary winding and at least one secondary winding , characterized in that each of the primary and secondary windings is arranged around a carcass (9) of insulating material, surrounding the ring (3), this carcass (9) being provided on its internal face with guide means (20 , 20 ', 27) intended to come into contact with the internal face of the strip (4) constituting the ring. Transformateur suivant la revendication 1 caractérisé en ce qu'il comporte au moins quatre carcasses (9a,9b,9c,9d) disposées deux à deux symétriquement par rapport au centre de l'anneau.Transformer according to claim 1 characterized in that it comprises at least four carcasses (9a, 9b, 9c, 9d) arranged in pairs symmetrically with respect to the center of the ring. Transformateur suivant la revendication 1 caractérisé en ce que les moyens de guidage sont constitués de deux bossages (20,20') en forme d'arc de cercle, de même rayon (r) que le rayon intérieur de l'anneau (3) et disposés respectivement sur la face interne supérieure et sur la face interne inférieure de la carcasse.Transformer according to claim 1 characterized in that the guide means consist of two bosses (20,20 ') in the form of a circular arc, of the same radius (r) as the inner radius of the ring (3) and disposed respectively on the upper internal face and on the lower internal face of the carcass. Transformateur suivant la revendication 1 caractérisé en ce que les moyens de guidage sont constitués d'une série de galets (27), montés à rotation entre deux parties (15,17) de la carcasse, dont les axes longitudinaux (yy') sont perpendiculaires au plan de l'anneau (3), et sont disposés suivant un arc de cercle de même rayon (r) que le rayon interne de l'anneau (3), de façon à ce qu'ils viennent en contact avec la face interne de celui-ci.Transformer according to claim 1 characterized in that the guide means consist of a series of rollers (27), mounted for rotation between two parts (15,17) of the carcass, whose longitudinal axes (yy ') are perpendicular in the plane of the ring (3), and are arranged in an arc of a circle of the same radius (r) as the internal radius of the ring (3), so that they come into contact with the internal face of it. Transformateur suivant l'une quelconque des revendications précédentes caractérisé en ce que la carcasse est constituée d'un boîtier (9) parallélépipédique ouvert sur deux de ses faces opposées (10,10').Transformer according to any one of the preceding claims, characterized in that the carcass consists of a parallelepipedal housing (9) open on two of its opposite faces (10,10 '). Transformateur suivant la revendication 5 caractérisé en ce que le boîtier (9) est constitué d'un élément développable (9') comprenant quatre parties correspondant aux quatre côtés du boîtier (9), séparées par des zones pliables (13) de moindre résistance, correspondant aux arêtes dudit boîtier (9), deux des parties constituant les faces principales (15,17) dudit boîtier (9) étant pourvues sur leurs parties internes de deux bossages (19,19') de forme circulaire et de rayon extérieur correspondant au rayon (r) interne de l'anneau (3), et dont les concavités sont en regard l'une de l'autre, ces bossages comportant une série de trous (21,23) perpendiculaires au plan des faces principales (15,17), les trous (23) associés à l'un des bossages (19'), étant en outre pourvus, à leur partie supérieure, d'un fraisage (25).Transformer according to claim 5, characterized in that the housing (9) consists of a developable element (9 ') comprising four parts corresponding to the four sides of the housing (9), separated by foldable zones (13) of less resistance, corresponding to the edges of said housing (9), two of the parts constituting the main faces (15,17) of said housing (9) being provided on their internal parts with two bosses (19,19 ') of circular shape and external radius corresponding to the internal radius (r) of the ring (3), and whose concavities are opposite one another, these bosses comprising a series of holes (21,23) perpendicular to the plane of the main faces (15,17 ), the holes (23) associated with one of the bosses (19 '), being further provided, at their upper part, with a milling (25). Transformateur suivant la revendication 6 caractérisé en ce que le boîtier (9) est pourvu d'une série de galets de guidage (37) constitués d'une partie centrale (31) terminée, à chacune de ses extrémités par un tourillon (29), de plus faible diamètre, ce tourillon étant monté à rotation dans les trous (21,23) des bossages (19,19'), le diamètre de la partie centrale (31) de chacun des galets de guidage (37) étant tel qu'il dépasse, en direction de l'intérieur du boîtier (9), le bossage (19,19') dans lequel il est monté.Transformer according to Claim 6, characterized in that the housing (9) is provided with a series of guide rollers (37) consisting of a central part (31) terminated, at each of its ends by a pin (29), of smaller diameter, this pin being rotatably mounted in the holes (21,23) of the bosses (19,19 '), the diameter of the central part (31) of each of the guide rollers (37) being such that it protrudes, towards the interior of the housing (9), the boss (19,19 ') in which it is mounted. Transformateur suivant l'une quelconque des revendications précédentes caractérisé en ce que l'enroulement secondaire est constitué d'une série de plaquettes métalliques (35) rectangulaires comportant un évidemment central (37) de forme rectangulaire de dimensions légèrement supérieures aux faces extrêmes (10,10') du boîtier (9), de façon à lui permettre de prendre place sur celui-ci, et définissant deux bras horizontaux à savoir un bras supérieur (43) et un bras inférieur (45) et deux bras verticaux à savoir un bras externe (51) et un bras interne (52), l'un des bras verticaux comportant une fente horizontale (41) permettant de réaliser, par pliage des bras supérieur (3) et inférieur (45) la liaison du bras supérieur (43) d'une plaquette (35) avec le bras inférieur (45) d'une plaquette qui lui est adjacente, chaque plaquette (35) étant distante d'une plaquette adjacente d'une valeur (e) fonction du diélectrique existant entre deux plaquettes (35) adjacentes.Transformer according to any one of previous claims characterized in that the secondary winding consists of a series of rectangular metal plates (35) comprising a central recess (37) of rectangular shape with dimensions slightly greater than the end faces (10,10 ') of the housing (9 ), so as to allow it to take place thereon, and defining two horizontal arms namely an upper arm (43) and a lower arm (45) and two vertical arms namely an outer arm (51) and an arm internal (52), one of the vertical arms comprising a horizontal slot (41) making it possible, by folding the upper (3) and lower (45) arms, to link the upper arm (43) of a plate (35) with the lower arm (45) of a plate which is adjacent to it, each plate (35) being distant from an adjacent plate by a value (e) as a function of the dielectric existing between two adjacent plates (35). Transformateur suivant la revendication 8 caractérisé en ce que la liaison entre deux plaquettes (35) adjacentes est réalisée par soudage.Transformer according to Claim 8, characterized in that the connection between two adjacent plates (35) is produced by welding. Transformateur suivant l'une quelconque des revendications 8 ou 10 caractérisé en ce que l'ensemble d'un enroulement secondaire constitué des plaquettes (35) est constitué d'une seule pièce obtenue par moulage.Transformer according to any one of claims 8 or 10 characterized in that the assembly of a secondary winding consisting of plates (35) consists of a single piece obtained by molding. Transformateur suivant la revendication 8 caractérisé en ce qu'au moins les deux plaquettes (35) extrêmes correspondant aux spires extrêmes d'un même enroulement ont un bras vertical externe prolongé vers l'extérieur du transformateur de façon à constituer une partie de connexion (51).Transformer according to Claim 8, characterized in that at least the two end plates (35) corresponding to the end turns of the same winding have an external vertical arm extended towards the outside of the transformer so as to constitute a connection part (51 ). Transformateur suivant la revendication 11 caractérisé en ce que la partie de connexion (51) est accessible de l'extérieur du transformateur.Transformer according to claim 11 characterized in that the connection part (51) is accessible from the outside of the transformer. Transformateur suivant la revendication 12 caractérisé en ce que le la partie de connexion est pourvue d'une fente (88) parallèle au plan de l'anneau (3).Transformer according to Claim 12, characterized in that the connection part is provided with a slot (88) parallel to the plane of the ring (3). Transformateur suivant la revendication 13 caractérisé en ce que la fente (88) est traversée par une vis (84) venant se visser dans un trou fileté central (72) d'une noix de serrage (70), cette noix de serrage (70) comportant une fente transversale (76) s'étendant sur une partie de la longueur du trou fileté (72), au moins un fil électrique (80) venant prendre place entre le bras vertical externe prolongé (51) et la noix de serrage (70).Transformer according to Claim 13, characterized in that the slot (88) is crossed by a screw (84) which is screwed into a central threaded hole (72) of a clamping nut (70), this clamping nut (70) comprising a transverse slot (76) extending over part of the length of the threaded hole (72), at least one electric wire (80) coming to take place between the extended external vertical arm (51) and the clamping nut (70 ). Transformateur suivant la revendication 14 caractérisé en ce que la noix de serrage (70) est pourvue d'une embase (85), d'épaisseur inférieure au diamètre du fil (80) à serrer, et venant s'appliquer au cours du serrage sur le bras vertical externe (51).Transformer according to Claim 14, characterized in that the clamping nut (70) is provided with a base (85), of thickness less than the diameter of the wire (80) to be clamped, and which is applied during the clamping on the external vertical arm (51). Procédé de fabrication d'un transformateur de type tonique comprenant un circuit magnétique en forme d'anneau (3) constitué d'une série d'enroulements d'un feuillard (4) en tôle magnétique, autour duquel sont disposés au moins un enroulement primaire et au moins un enroulement secondaire, dans lequel chacun des enroulements primaire et secondaire est disposé autour d'une carcasse (9) en matériau isolant, entourant l'anneau (3), cette carcasse (9) étant pourvue sur sa face interne de moyens de guidage (20,20',27) destinés à venir en contact avec la face interne du feuillard constituant l'anneau, caractérisé en ce qu'il comporte les étapes consistant à enrouler le feuillard (4) sur un moyeu de rayon sensiblement égal au rayon interne (r) de l'anneau (3) constituant le circuit magnétique du transformateur, à faire subir au feuillard (4) ainsi enroulé, un revenu à une température d'environ 800°C, puis à enrouler le feuillard (4) à l'intérieur des carcasses (9) préalablement positionnées les unes par rapport aux autres.Method of manufacturing a tonic type transformer comprising a ring-shaped magnetic circuit (3) consisting of a series of windings of a strip (4) made of magnetic sheet, around which are arranged at least one primary winding and at least one secondary winding, in which each of the primary and secondary windings is disposed around a carcass (9) of insulating material, surrounding the ring (3), this carcass (9) being provided on its internal face with means guide (20,20 ', 27) intended to come into contact with the internal face of the strip constituting the ring, characterized in that it comprises the steps consisting in winding the strip (4) on a hub of radius substantially equal to the internal radius (r) of the ring (3) constituting the magnetic circuit of the transformer, in subjecting the strip (4) thus wound, an income to a temperature of about 800 ° C, then winding the strip (4) inside the carcasses (9) previously positioned relative to each other. Procédé suivant la revendication 16 caractérisé en ce que la température de revenu est obtenue en faisant traverser le feuillard (4) par un courant électrique.Method according to Claim 16, characterized in that the tempering temperature is obtained by passing the strip (4) through an electric current. Procédé de fabrication suivant l'une des revendications 16 ou 17 caractérisé en ce que l'on applique contre les moyens de guidage (20,20' ,27) d'au moins deux carcasses extrêmes (9), à savoir une première carcasse (9a) et un dernière carcasse (9d), une bande d'entraînement (92) mobile en translation, en ce que l'on introduit entre cette bande d'entraînement (92) et les moyens de guidage (20,20',27) de la première carcasse (9a) une extrémité du feuillard (4), en ce que l'on fait se déplacer la bande d'entraînement (92) à l'intérieur des carcasses (9), en ce que l'on fixe l'extrémité du feuillard magnétique (4) sortant de la dernière carcasse (9d) sur la partie du feuillard magnétique (4) entrant dans la première carcasse (9a), en ce que l'on déplace la bande d'entraînement (92) dans son sens longitudinal de façon à bobiner à l'intérieur des carcasses (9) le nombre de spires nécessaire souhaité pour constituer le noyau magnétique du transformateur.Manufacturing method according to one of claims 16 or 17 characterized in that one applies against the guide means (20,20 ', 27) of at least two extreme carcasses (9), namely a first carcass ( 9a) and a last carcass (9d), a drive band (92) movable in translation, in that one introduces between this drive band (92) and the guide means (20,20 ', 27 ) of the first carcass (9a) one end of the strip (4), in that the drive band (92) is made to move inside the carcasses (9), in that one fixes the end of the magnetic strip (4) leaving the last carcass (9d) on the part of the magnetic strip (4) entering the first carcass (9a), in that the drive strip (92) is moved in its longitudinal direction so as to wind inside the carcasses (9) the number of turns required to form the magnetic core of the transformer. Procédé de fabrication suivant l'une des revendications 16 à 18 caractérisé en ce que l'on enroule le feuillard magnétique (4), après l'opération de recuit, et avant l'opération d'enroulement, sur un moyeu circulaire (82), mobile en rotation autour de son axe central, le rayon de ce moyeu étant sensiblement égal au rayon externe r' de l'anneau (3).Manufacturing process according to one of Claims 16 to 18, characterized in that the magnetic strip (4) is wound, after the annealing operation, and before the winding operation, on a circular hub (82), movable in rotation about its central axis, the radius of this hub being substantially equal to the external radius r 'of the ring (3). Procédé de fabrication suivant l'une des revendications 16 à 19 caractérisé en ce que la bande d'entraînement (92) est une bande sans fin montée sur des galets (A,B,C,D), au moins l'un de ces galets (A) étant un galet d'entraînement en rotation, et au moins l'un de ces galets (D) étant un galet de régulation de tension de la bande sans fin (92).Manufacturing method according to one of Claims 16 to 19, characterized in that the drive belt (92) is an endless belt mounted on rollers (A, B, C, D), at least one of these rollers (A) being a rotation drive roller, and at least one of these rollers (D) being a roller for regulating the tension of the endless belt (92).
EP90403761A 1990-01-05 1990-12-24 Toroidal transformer Withdrawn EP0436434A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9000097 1990-01-05
FR9000097A FR2656951A1 (en) 1990-01-05 1990-01-05 TORQUE TYPE TRANSFORMER.

Publications (1)

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EP0436434A1 true EP0436434A1 (en) 1991-07-10

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EP90403761A Withdrawn EP0436434A1 (en) 1990-01-05 1990-12-24 Toroidal transformer

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EP (1) EP0436434A1 (en)
FR (1) FR2656951A1 (en)
WO (1) WO1991010244A1 (en)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
NL9300433A (en) * 1993-03-10 1994-10-03 Amplimo B V Step-up transformer
WO2000028557A1 (en) * 1998-11-10 2000-05-18 Vacuumschmelze Gmbh Method for producing a closed magnetic core
WO2004105063A2 (en) * 2003-05-16 2004-12-02 Jean-Marc Scherrer Transformer winding and production method thereof
CN102360860A (en) * 2011-06-03 2012-02-22 宝电电子(张家港)有限公司 Transformer with shell and magnetic ring

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Publication number Priority date Publication date Assignee Title
NL9300433A (en) * 1993-03-10 1994-10-03 Amplimo B V Step-up transformer
WO2000028557A1 (en) * 1998-11-10 2000-05-18 Vacuumschmelze Gmbh Method for producing a closed magnetic core
WO2004105063A2 (en) * 2003-05-16 2004-12-02 Jean-Marc Scherrer Transformer winding and production method thereof
WO2004105063A3 (en) * 2003-05-16 2005-04-07 Jean-Marc Scherrer Transformer winding and production method thereof
US7836580B2 (en) 2003-05-16 2010-11-23 Jean-Marc Scherrer Transformer winding and production method thereof
CN102360860A (en) * 2011-06-03 2012-02-22 宝电电子(张家港)有限公司 Transformer with shell and magnetic ring

Also Published As

Publication number Publication date
FR2656951A1 (en) 1991-07-12
FR2656951B1 (en) 1995-02-03
WO1991010244A1 (en) 1991-07-11

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