EP0544082A1 - Method for compacting transformer windings - Google Patents
Method for compacting transformer windings Download PDFInfo
- Publication number
- EP0544082A1 EP0544082A1 EP92116946A EP92116946A EP0544082A1 EP 0544082 A1 EP0544082 A1 EP 0544082A1 EP 92116946 A EP92116946 A EP 92116946A EP 92116946 A EP92116946 A EP 92116946A EP 0544082 A1 EP0544082 A1 EP 0544082A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- winding
- turns
- electric current
- passage
- current
- 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
Links
- 238000004804 winding Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims description 14
- 239000012777 electrically insulating material Substances 0.000 claims abstract description 4
- 230000003252 repetitive effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 9
- 208000027418 Wounds and injury Diseases 0.000 description 5
- 238000005056 compaction Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 235000012431 wafers Nutrition 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000005293 physical law Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
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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
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core
Definitions
- the present invention is in the field of construction of inductive electrical devices of the static type, such as transformers. It relates more precisely to the realization of the winding of the electrically conductive windings equipping the devices of the aforementioned type. Even more precisely, the invention applies specifically, but not limitatively, to the cases of the windings, generally forming the “medium or high voltage” windings of the transformers, and consisting of one or more electrically conductive wires, usually made of aluminum or copper. , previously enamelled or otherwise coated with an electrically insulating material, and wound in loosely turns, in a rotation movement of uniform direction.
- the operation is entirely controlled by a programmable automaton which prints a couple of speeds at each instant (speeds of supply into the reception space and relative rotation relative to the latter) adjusted to the removal of a turn at the desired position in the wafer being formed, and this only under the effect of gravity, that is to say without significant traction or thrust on the wire.
- This winding technique applies without particular difficulty to aluminum or copper wires having less than 0.5 mm to 5 mm and more in diameter.
- the inevitable proliferation of turns within the winding remains moderate. Its effect on the apparent volume of the latter is entirely acceptable, especially since the winding settles a little naturally under the effect of its own weight. It is nevertheless possible, if necessary, to further reduce the overall height by a packing operation which consists in compressing the winding by its ends, by pressing on it by means of a press or, more conventionally, by hand.
- the use of a press presupposes having a range of pushers adapted to the varied size of the windings produced, and mounting the suitable one depending on the size of the winding to be packed.
- the object of the present invention is to provide a settlement in height of the winding after its winding, without the intervention of external forces, therefore without the aforementioned drawbacks.
- the subject of the invention is a method of compacting the height of an electric winding fitted to transformers, and consisting of at least one electrically conductive wire coated with an electrically insulating material and wound in loosely wound turns. according to a rotation movement of uniform direction, process characterized in that, after its winding, a continuous electric current is passed through the turns of the winding before it is mounted in the transformer to receive it.
- the invention consists in applying the well-known physical law according to which two parallel conductors traversed by electric currents of the same direction attract each other.
- the intensity of the settlement current is the predominant factor, since the force of mutual attraction depends on the square of the value of this intensity. This is of course a function of the cross section of the conductor, but the current density must be at least ten amps / mm2 to obtain a significant result, and preferably several tens of amps / mm2, namely on the order of 20 - 40 A / mm2 to fix ideas, to obtain a fully satisfactory result.
- This current can be produced directly in this form, but more generally, it will be a rectified alternating current.
- the electric power involved during compaction depends on the impedance of the winding, which is reduced only to the electrical resistance in direct current.
- the use of an alternating current, or more generally variable would impose a power which is much too high because of the large number of turns in this type of winding, therefore of an impedance also very high.
- parasitic effects that are difficult to control could occur on the winding, and thwart the desired settlement, following the induction phenomena that a variable current would not fail to generate in the immediate environment of the winding, if electrically conductive bodies are present.
- the intensity of the direct current used was 150 A., delivered under a voltage of 2000 V.
- the uninterrupted passage time of the current was limited to a few seconds (2 or 3 sec. Approximately) and this operation was done only once and on a non-vibrating support.
- the reduction in height observed in the winding was that sought, namely 15 mm. It was comparable to that obtained by manual push, whose intensity is known to be around 30 to 50 kgF, depending on the individual. Generally a settling effect in height of about 10% can be obtained by the implementation of the invention, and this if necessary, after a few repetitive current flow sequences (three or four), interspersed with brief periods of stoppage to allow the winding to cool and the turns to relax.
- the invention applies to any electrical winding of a transformer, or similar device, having lost internal voids due to its technique of winding in loosely turns, including that described in the European patent n ° 081446 already cited (removal of turns under gravity) is an example which is well representative, but in no way limitative, of the scope of the invention.
Landscapes
- Power Engineering (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Coils Of Transformers For General Uses (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Transformers For Measuring Instruments (AREA)
- Coil Winding Methods And Apparatuses (AREA)
- Insulating Of Coils (AREA)
- Coils Or Transformers For Communication (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Vehicle Body Suspensions (AREA)
- Burglar Alarm Systems (AREA)
- Transformer Cooling (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
La présente invention se situe dans le domaine de la construction d'appareils électriques inductifs de type statique, tels que les transformateurs.
Elle a trait plus précisément à la réalisation du bobinage des enroulements électroconducteurs équipant les appareils d u type précité.
Plus précisément encore, l'invention s'applique spécifiquement,mais non limitativement, aux cas des enroulements,formant généralement les enroulements "moyenne ou haute tension" des transformateurs, et constitués d'un ou plusieurs fils électroconducteurs, habituellement en aluminium ou en cuivre, préalablement émaillés ou revêtus autrement par un matériau isolant de l'électricité, et bobinés en spires non serrées, selon un mouvement de rotation de sens uniforme.
Dans ce cadre, elle concerne le tassement des enroulements de ce type une fois bobinés, afin d'en diminuer la hauteur et,par voie de conséquence, de réduire le coût de fabrication de l'appareil qui en est pourvu.
On connaît, par le brevet EP 0081446, une technique particulière de bobinage de ce genre pour enroulements de transformateurs électriques, qui consiste à introduire un fil en continu dans un espace annulaire de réception, où il se met en spires qui se forment par simple dépose du fil sous le seul effet de la pesanteur pour y former au mieux des empilages de galettes plates spiralées constituées chacune d'une nappe de spires concentriques
Un sens de rotation uniforme est conservé durant tout le bobinage, afin que lors de l'utilisation de l'appareil, le courant électrique parcourt toutes les spires dans le même sens. L'opération est entièrement pilotée par un automate programmable qui imprime au fil à chaque instant un couple de vitesses (vitesses d'amenée dans l'espace de réception et de rotation relative par rapport à ce dernier) ajusté à la dépose d'une spire à la position souhaitée dans la galette en formation, et ce,sous le seul effet de la pesanteur, c'est-à-dire sans mise en traction ou poussée significatives sur le fil.The present invention is in the field of construction of inductive electrical devices of the static type, such as transformers.
It relates more precisely to the realization of the winding of the electrically conductive windings equipping the devices of the aforementioned type.
Even more precisely, the invention applies specifically, but not limitatively, to the cases of the windings, generally forming the “medium or high voltage” windings of the transformers, and consisting of one or more electrically conductive wires, usually made of aluminum or copper. , previously enamelled or otherwise coated with an electrically insulating material, and wound in loosely turns, in a rotation movement of uniform direction.
In this context, it relates to the compaction of windings of this type once wound, in order to reduce the height and, consequently, to reduce the manufacturing cost of the device which is provided with it.
We know, from patent EP 0081446, a particular winding technique of this kind for windings of electric transformers, which consists in introducing a continuous wire into an annular receiving space, where it turns into turns which are formed by simple removal wire under the sole effect of gravity to best form stacks of spiral flat wafers each consisting of a sheet of concentric turns
A uniform direction of rotation is maintained throughout the winding, so that when using the device, the electric current flows through all the turns in the same direction. The operation is entirely controlled by a programmable automaton which prints a couple of speeds at each instant (speeds of supply into the reception space and relative rotation relative to the latter) adjusted to the removal of a turn at the desired position in the wafer being formed, and this only under the effect of gravity, that is to say without significant traction or thrust on the wire.
Cette technique de bobinage s'applique sans difficulté particulière à des fils d'aluminium ou de cuivre ayant moins de 0.5 mm à 5 mm et plus de diamètre.
Lorsque l'opération est correctement conduite, le foisonnement inévitable des spires au sein de l'enroulement reste modéré. Son effet sur le volume apparent de ce dernier est tout-à-fait acceptable, d'autant que l,enroulement se tasse un peu naturellement sous l'effet de son propre poids.
On peut néanmoins en cas de besoin réduire encore l'encombrement en hauteur par une intervention de tassement qui consiste à comprimer l'enroulement par ses extrémités, en appuyant dessus au moyen d'une presse ou, plus classiquement, à la main.
L'usage d'une presse suppose d'avoir à disposition une gamme de poussoirs adaptés au gabarit varié des enroulements fabriqués, et de monter celui qui convient en fonction du format de l'enroulement à tasser.Cela nécessite également des opérations de déplacément et de présentation correcte de l'enroulement sous l'outil.
L'intervention d'un opérateur humain (ou même de plusieurs), qui se servirait de ses mains pour appuyer sur l'enroulement, présente l'inconvénient d'une poussée ponctuelle, nécessairement limitée en intensité et en durée. Il s'y ajoute des aspects de sécurité d'autant plus sensibles que ce sont des mains qui sont ainsi directement exposées à des risques de blessures.This winding technique applies without particular difficulty to aluminum or copper wires having less than 0.5 mm to 5 mm and more in diameter.
When the operation is properly carried out, the inevitable proliferation of turns within the winding remains moderate. Its effect on the apparent volume of the latter is entirely acceptable, especially since the winding settles a little naturally under the effect of its own weight.
It is nevertheless possible, if necessary, to further reduce the overall height by a packing operation which consists in compressing the winding by its ends, by pressing on it by means of a press or, more conventionally, by hand.
The use of a press presupposes having a range of pushers adapted to the varied size of the windings produced, and mounting the suitable one depending on the size of the winding to be packed. This also requires displacement and correct presentation of the winding under the tool.
The intervention of a human operator (or even several), who would use his hands to press the winding, has the disadvantage of a punctual push, necessarily limited in intensity and duration. There are security aspects which are all the more sensitive since these are hands which are thus directly exposed to the risk of injury.
Le but de la présente invention est de procurer un tassement en hauteur de l'enroulement après son bobinage, sans intervention de forces extérieures, donc sans les inconvénients précités.The object of the present invention is to provide a settlement in height of the winding after its winding, without the intervention of external forces, therefore without the aforementioned drawbacks.
A cet effet,l'invention a pour objet un procédé de tassement en hauteur d'un enroulement électrique équipant des transformateurs, et constitué par au moins un fil électro-conducteur revêtu par un matériau isolant de l'électricité et bobiné en spires non serrées selon un mouvement de rotation de sens uniforme, procédé caractérisé en ce que, après son bobinage, on fait parcourir un courant électrique continu dans les spires de l'enroulement avant son montage dans le transformateur devant le recevoir.
Comme on l'aura sans doute déjà compris,l'invention consiste à faire application de la loi physique bien connue selon laquelle deux conducteurs parallèles parcourus par des courants électriques de même sens s'attirent mutuellement.To this end, the subject of the invention is a method of compacting the height of an electric winding fitted to transformers, and consisting of at least one electrically conductive wire coated with an electrically insulating material and wound in loosely wound turns. according to a rotation movement of uniform direction, process characterized in that, after its winding, a continuous electric current is passed through the turns of the winding before it is mounted in the transformer to receive it.
As will no doubt already be understood, the invention consists in applying the well-known physical law according to which two parallel conductors traversed by electric currents of the same direction attract each other.
Sous l'action de telles forces électro-magnétiques internes, les spires tendent à se rapprocher entre-elles deux à deux. L'effet global est une diminution des espaces perdus dans l'enroulement,qui se traduit par une réduction du volume apparent de l'enroulement,notamment de sa hauteur,puisque ces enroulements sont généralement beaucoup plus longs qu'épais.
L'intensité du courant de tassement est le facteur prépondérant.La force d'attraction mutuelle dépend en effet du carré de la valeur de cette intensité. Celle-ci est fonction bien entendu de la section du conducteur, mais la densité de courant doit être d'une dizaine d'ampères/mm² au moins pour obtenir un résultat significatif,et de plusieurs dizaines d'ampères/mm² de préférence à savoir de l'ordre de 20 - 40 A/mm² pour fixer les idées, pour obtenir un résultat pleinement satisfaisant.
Des essais ont montré en effet que pour des fils de diamètre inférieur à 5 mm, en deçà d'une densité de courant de 10 A/mm² la force électromagnétique de tassement risque d'être insuffisanté pour vaincre avec efficacité les forces de frottement des spires entre-elles.
Il n'y a pas de limite supérieure à la valeur de l'intensité du courant électrique de tassement selon l'invention. Toutefois, il faut veiller à éviter un échauffement excessif de l'enroulement qui conduirait à une dégradation du revêtement isolant et, par conséquent, à des courts-circuits internes.
L'expérience montre qu'une durée ininterrompue de passage du courant de quelques secondes, par exemple de 1 à 5 sec., est appropriée. On peut bien entendu répéter l'opération à plusieurs reprises, entrecoupées de courtes périodes de refroidissement, de quelques secondes également. On observe d'ailleurs, juste après l'arrêt du courant, un léger rallongement de l'enroulement de quelques millimètres, dû sans doute à un effet "ressort" des spires qui se relaxent après disparition de la force d'attraction
Sans en être certain, il est cependant fort possible que ce soit précisément en raison de ce phénomène de relaxation des spires par effet "ressort" que le tassement final s'accroît quand on opère par séquences successives.
Des résultats encore améliorés peuvent être obtenus par mise en vibration mécanique de l'enroulement soit pendant le passage du courant, soit au cours des périodes d'interruption,soit durant toute l'opération de tassement. La mise en vibration peut être réalisée simplement à l'aide d'un plateau vibrant servant de support à l'enroulement.
L'invention peut être mise en oeuvre de manière très simple en appliquant une tension électrique continue aux deux extrémités préalablement dénudées de l'enroulement.
Il importe que le courant électrique utilisé soit un courant continu. Ce courant peut être produit directement sous cette forme, mais plus généralement, il s'agira d'un courant alternatif redressé.
La puissance électrique mise en jeu lors du tassement dépend en effet de l'impédance du bobinage,laquelle se réduit uniquement à la résistance électrique en courant continu. En revanche,l'utilisation d'un courant alternatif, ou plus généralement variable, imposerait une puissance bien trop élevée en raison du nombre important de spires dans ce type d'enroulement, donc d'une impédance également très élevée.
De surcroît, dans ce cas des effets parasites difficilement contrôlables pourraient survenir sur l'enroulement, et contrarier le tassement recherché, suite aux phénomènes d'induction qu'un courant variable ne manquerait pas de générer dans l'environnement immédiat de l'enroulement, si des corps électroconducteurs s'y trouvent.
Précisément, il est souhaitable de maintenir latéralement l'enroulement par exemple en disposant une virole autour de lui, afin de conserver son diamètre extérieur à une valeur voulue qui sinon aurait tendance à augmenter légèrement sous l'effet du tassement en hauteur. Or,il se trouve qu'on a avantage à choisir une virole métallique,donc conductrice du courant, car sa surface lisse offre alors une résistance de frottement minime aux spires et facilite ainsi le tassement par rapport à l'emploi d'un matériau plus rugueux.
Des essais ont été effectués entre-autres sur un enroulement primaire d'un transformateur de 3.5 MVA de puissance nominale, constitué par un fil d'aluminium de 2.65 mm de diamètre revêtu d'une couche d'émail de 0.06 mm d'épaisseur, et présentant, à l'état brut de bobinage, une hauteur de 630 mm. Cette hauteur représentait une "hors cote" de 15 mm,qu'il s'agissait d'éliminer par tassement.Under the action of such internal electromagnetic forces, the turns tend to approach each other two by two. The overall effect is a reduction in the space lost in the winding, which results in a reduction in the apparent volume of the winding, in particular in its height, since these windings are generally much longer than thick.
The intensity of the settlement current is the predominant factor, since the force of mutual attraction depends on the square of the value of this intensity. This is of course a function of the cross section of the conductor, but the current density must be at least ten amps / mm² to obtain a significant result, and preferably several tens of amps / mm², namely on the order of 20 - 40 A / mm² to fix ideas, to obtain a fully satisfactory result.
Tests have shown that for wires with a diameter of less than 5 mm, below a current density of 10 A / mm², the electromagnetic packing force may be insufficient to effectively overcome the friction forces of the turns. between them.
There is no upper limit to the value of the intensity of the electric settlement current according to the invention. However, care must be taken to avoid excessive heating of the winding which would lead to degradation of the insulating coating and, consequently, to internal short circuits.
Experience shows that an uninterrupted duration of current flow of a few seconds, for example from 1 to 5 sec., Is appropriate. It is of course possible to repeat the operation several times, interspersed with short periods of cooling, also lasting a few seconds. We also observe, just after the current has stopped, a slight extension of the winding of a few millimeters, no doubt due to a "spring" effect of the turns which relax after the attraction has disappeared.
Without being certain, it is however very possible that it is precisely because of this phenomenon of relaxation of the turns by the "spring" effect that the final settlement increases when one operates in successive sequences.
Further improved results can be obtained by mechanically vibrating the winding either during the passage of the current, or during periods of interruption, or during the whole packing operation. The vibration can be simply made using a vibrating plate serving as a support for the winding.
The invention can be implemented in a very simple manner by applying a continuous electric voltage to the two previously stripped ends of the winding.
It is important that the electric current used is a direct current. This current can be produced directly in this form, but more generally, it will be a rectified alternating current.
The electric power involved during compaction depends on the impedance of the winding, which is reduced only to the electrical resistance in direct current. On the other hand, the use of an alternating current, or more generally variable, would impose a power which is much too high because of the large number of turns in this type of winding, therefore of an impedance also very high.
In addition, in this case parasitic effects that are difficult to control could occur on the winding, and thwart the desired settlement, following the induction phenomena that a variable current would not fail to generate in the immediate environment of the winding, if electrically conductive bodies are present.
Specifically, it is desirable to maintain the winding laterally for example by placing a ferrule around it, in order to keep its outside diameter at a desired value which would otherwise tend to increase slightly under the effect of the compaction in height. However, it turns out that it is advantageous to choose a metal ferrule, therefore conductive of the current, because its smooth surface then offers minimal friction resistance to the turns and thus facilitates compaction compared to the use of a more material. rough.
Tests were carried out inter alia on a primary winding of a transformer of 3.5 MVA of nominal power, constituted by an aluminum wire of 2.65 mm in diameter coated with a layer of enamel of 0.06 mm thick, and having, in the raw winding state, a height of 630 mm. This height represented an "over dimension" of 15 mm, which had to be eliminated by compaction.
Pour y parvenir, l'intensité du courant continu utilisé a été de 150 A., délivrée sous une tension de 2000 V. Le temps de passage ininterrompu du courant a été limité à quelques secondes (2 ou 3 sec.environ) et cette opération n'a été faite qu'une fois et sur un support non vibrant.
Au terme de cette opération, la diminution en hauteur constatée de l'enroulement a été celle recherchée,à savoir 15 mm. Elle a été comparable à celle obtenue par poussée manuelle,dont on sait que l'intensité est de l'ordre de 30 à 50 kgF, selon les individus.
Généralement un effet de tassement en hauteur de 10% environ peut être obtenu par la mise en oeuvre de l'invention, et ce au besoin, après quelques séquences répétitives de passage du courant (trois ou quatre),entrecoupées de brèves périodes d'arrêt pour permettre à l'enroulement de se refroidir et aux spires de se relaxer.To achieve this, the intensity of the direct current used was 150 A., delivered under a voltage of 2000 V. The uninterrupted passage time of the current was limited to a few seconds (2 or 3 sec. Approximately) and this operation was done only once and on a non-vibrating support.
At the end of this operation, the reduction in height observed in the winding was that sought, namely 15 mm. It was comparable to that obtained by manual push, whose intensity is known to be around 30 to 50 kgF, depending on the individual.
Generally a settling effect in height of about 10% can be obtained by the implementation of the invention, and this if necessary, after a few repetitive current flow sequences (three or four), interspersed with brief periods of stoppage to allow the winding to cool and the turns to relax.
L'invention s'applique à tout enroulement électrique de transformateur, ou d' appareil analogue, présentant des vides internes perdus dûs à sa technique de bobinage en spires non serrées, dont celle décrite dans le brevet européen n°081446 déjà cité (dépose de spires sous l'effet de la pesanteur) est un exemple bien représentatif, mais nullement limitatif, du champ d'application de l'invention.The invention applies to any electrical winding of a transformer, or similar device, having lost internal voids due to its technique of winding in loosely turns, including that described in the European patent n ° 081446 already cited (removal of turns under gravity) is an example which is well representative, but in no way limitative, of the scope of the invention.
Claims (7)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9112705 | 1991-10-16 | ||
| FR9112705 | 1991-10-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0544082A1 true EP0544082A1 (en) | 1993-06-02 |
| EP0544082B1 EP0544082B1 (en) | 1996-02-07 |
Family
ID=9417936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92116946A Expired - Lifetime EP0544082B1 (en) | 1991-10-16 | 1992-10-05 | Method for compacting transformer windings |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US5463806A (en) |
| EP (1) | EP0544082B1 (en) |
| JP (1) | JP3226988B2 (en) |
| KR (1) | KR930008887A (en) |
| AT (1) | ATE134067T1 (en) |
| AU (1) | AU656229B2 (en) |
| CA (1) | CA2080662A1 (en) |
| DE (1) | DE69208224T2 (en) |
| ES (1) | ES2086041T3 (en) |
| FI (1) | FI924619A (en) |
| NO (1) | NO305050B1 (en) |
| TW (1) | TW207025B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012007232B4 (en) * | 2012-04-07 | 2014-03-13 | Susanne Weller | Method for producing rotating electrical machines |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1461785A (en) * | 1964-11-30 | 1966-02-25 | Gen Electric | Method of changing the relative positions of movable conductors used in electric induction devices |
| DE2216240A1 (en) * | 1972-04-04 | 1973-10-18 | Siemens Ag | METHOD OF ELECTROMAGNETIC FORMING OF THE WINDING HEADS OF ELECTRIC MOTORS INTO THE GROOVES OF THE STAND |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3333328A (en) * | 1964-11-30 | 1967-08-01 | Gen Electric | Methods for changing relative positions of movable conductors for use in electrical inductive devices |
| GB1141136A (en) * | 1966-07-28 | 1969-01-29 | Gen Electric | Method and apparatus for developing coils in inductive devices |
-
1992
- 1992-10-05 DE DE69208224T patent/DE69208224T2/en not_active Expired - Lifetime
- 1992-10-05 ES ES92116946T patent/ES2086041T3/en not_active Expired - Lifetime
- 1992-10-05 AT AT92116946T patent/ATE134067T1/en not_active IP Right Cessation
- 1992-10-05 EP EP92116946A patent/EP0544082B1/en not_active Expired - Lifetime
- 1992-10-06 AU AU26205/92A patent/AU656229B2/en not_active Ceased
- 1992-10-07 TW TW081107964A patent/TW207025B/zh active
- 1992-10-09 NO NO923950A patent/NO305050B1/en not_active IP Right Cessation
- 1992-10-12 KR KR1019920018687A patent/KR930008887A/en not_active Application Discontinuation
- 1992-10-13 FI FI924619A patent/FI924619A/en unknown
- 1992-10-15 CA CA002080662A patent/CA2080662A1/en not_active Abandoned
- 1992-10-16 JP JP30507692A patent/JP3226988B2/en not_active Expired - Fee Related
-
1993
- 1993-11-08 US US08/148,533 patent/US5463806A/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1461785A (en) * | 1964-11-30 | 1966-02-25 | Gen Electric | Method of changing the relative positions of movable conductors used in electric induction devices |
| DE2216240A1 (en) * | 1972-04-04 | 1973-10-18 | Siemens Ag | METHOD OF ELECTROMAGNETIC FORMING OF THE WINDING HEADS OF ELECTRIC MOTORS INTO THE GROOVES OF THE STAND |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69208224T2 (en) | 1996-09-05 |
| ES2086041T3 (en) | 1996-06-16 |
| NO923950D0 (en) | 1992-10-09 |
| US5463806A (en) | 1995-11-07 |
| NO923950L (en) | 1993-04-19 |
| CA2080662A1 (en) | 1993-04-17 |
| ATE134067T1 (en) | 1996-02-15 |
| TW207025B (en) | 1993-06-01 |
| JP3226988B2 (en) | 2001-11-12 |
| FI924619A (en) | 1993-04-17 |
| AU2620592A (en) | 1993-04-22 |
| JPH05205963A (en) | 1993-08-13 |
| EP0544082B1 (en) | 1996-02-07 |
| FI924619A0 (en) | 1992-10-13 |
| NO305050B1 (en) | 1999-03-22 |
| AU656229B2 (en) | 1995-01-27 |
| KR930008887A (en) | 1993-05-22 |
| DE69208224D1 (en) | 1996-03-21 |
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