EP0081153B1 - Electrical shunt reactor - Google Patents

Electrical shunt reactor Download PDF

Info

Publication number
EP0081153B1
EP0081153B1 EP82110899A EP82110899A EP0081153B1 EP 0081153 B1 EP0081153 B1 EP 0081153B1 EP 82110899 A EP82110899 A EP 82110899A EP 82110899 A EP82110899 A EP 82110899A EP 0081153 B1 EP0081153 B1 EP 0081153B1
Authority
EP
European Patent Office
Prior art keywords
magnetic
shunt
shunts
coil
yokes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82110899A
Other languages
German (de)
French (fr)
Other versions
EP0081153A1 (en
Inventor
Gérard Messé
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom SA
Original Assignee
Alstom SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alstom SA filed Critical Alstom SA
Publication of EP0081153A1 publication Critical patent/EP0081153A1/en
Application granted granted Critical
Publication of EP0081153B1 publication Critical patent/EP0081153B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material

Definitions

  • the present invention relates to an electric shunt inductor. It is known to use such coils to compensate for the capacitive reactive energy of long high-voltage electric power lines and to increase the stability of networks.
  • the value of the induction in the case of a large coil d 'shunt inductance, can be several times higher than that which appears in the homologous zones for example of the transformers, and thus creates, in addition to additional losses, important hot spots.
  • British patent 983 481 describes a shunt inductor with reference to Figures 1 and 2.
  • This coil compasses cylinder heads 2 whose width is equal to the diameter of the coil 1.
  • the compressive forces due to electromagnetic forces are supported by a central column 3 made of insulating material, but beyond the diameter of the central column 3, the cylinder heads only rest on the coil 1 also, to transfer the forces only to the central column 3, the rods 2 of the bars 9 are welded ensure the rigidity of the cylinder heads and avoid placing stress on the coil 1.
  • Figure 3 and the text referring to it on page 3 lines 33 to 58 describes an alternative which consists in using a cylinder head whose width is the same as the diameter of the support column 3 and adding a cross-member made of laminated sheets 10 in the shape of an inverted U, the forces exerted on this cross-member being transmitted to the cylinder head and from there to the support column 3.
  • the invention aims to overcome these drawbacks.
  • the invention therefore relates to an electric shunt inductor comprising a magnetic frame formed by two legs joined by an upper yoke and a lower yoke, an electrical winding located in the center of the frame around a central core, parallel to the legs , the width L of the cylinder heads being less than the diameter of the electrical winding and close to the diameter of said central core, at least one magnetic shunt being placed on the outside of at least one of the two cylinder heads relative to the inside of the frame, the length of said shunt being greater than the width L of the cylinder head so as to exceed it on each side, said magnetic shunt being constituted by a stack of sheets, laminated perpendicular to the direction of statification of the stack of sheets of cylinder heads , the plane of the sheets of said shunt being parallel to the axis of the coil, characterized in that said shunt has the shape of a rectilinear rectangle parallelepiped.
  • two said magnetic shunts are placed above the upper yoke, located respectively on either side of a first clamping crosspiece of the magnetic circuit, and in that two said magnetic shunts are placed below the lower yoke, one of which, between a second crosspiece for clamping the magnetic circuit and a beam for fixing the coil to the bottom of a tank, and the other of which, between the other side of said crosspiece and a second beam for fixing the coil to the bottom of the tank.
  • the protruding length of the shunts on each side of the cylinder heads is close to the thickness of the cylinder heads.
  • the shunt inductor shown in the figures comprises a laminated magnetic sheet frame comprising two vertical legs 1 and 2 joined by an upper yoke 3 and a lower yoke 4. In the center of this magnetic frame is placed in electric winding 6 in layers whose figure 3 shows the shape of the section. This winding is located around a core 7 constituted in the example described by a succession of sections of iron and air gaps. An iron section 8 is shown in FIGS. 1 and 3.
  • the width of the yokes 5 and 4 is close to the diameter of the central core 7.
  • the magnetic frame is clamped by means of a clamping device 9 clamping an upper cross member 10 and a lower cross member 11 against the cylinder heads.
  • a clamping device 9 clamping an upper cross member 10 and a lower cross member 11 against the cylinder heads.
  • the lower and upper yokes are held tight by pieces 12, the triangular section of which is visible in FIG. 2, each welded to a master sheet 13 enclosing the pack of sheets.
  • the upper and lower clamping crosspieces 10 and 11 are fixed by means not shown to these clamping pieces 12.
  • the whole of the frame further comprises hoops not shown.
  • FIG. 1 shows only the bottom 14 and Figure 3 the cover 15 and the side wall 16.
  • the assembly is fixed to the bottom of the tank by means of two metal beams 17, 18.
  • FIG. 3 All around the tank are arranged magnetic shunts 19 (FIG. 3) each consisting of small bundles of sheets, in order to avoid losses in the tank.
  • two magnetic shunts 20 and 21 rectilinear of rectangular parallelepiped shape are located above the upper yoke 3 on either side of the upper clamping crosspiece 10.
  • Figure 2 shows the arrangement of these shunts and their stratification perpendicular to that of the yoke 3 and parallel to the axis of the coil.
  • These shunts have a length greater than the width L of the cylinder head so as to depress on each side of the cylinder head to a length advantageously close to the thickness e of the cylinder head.
  • Below the lower yoke 4 are also placed magnetic shunts 22 and 23, also rectilinear, respectively between the lower cross member 11 and the beam 17 and between the lower cross member 11 and the beam 18.
  • these shunts In the same way as the shunts located on the upper cylinder head, these shunts have a direction of stratification perpendicular to that of the lower cylinder head and they exceed its width on each side by a length equal to the thickness e of the cylinder head.
  • These shunts 20, 21, 22, 23 located outside the frame are fixed very simply because they do not have to resist the clamping pressure of the frame, nevertheless they must be sufficiently pressed against their respective cylinder head to eliminate the risks of vibrations and noise which could result from electromagnetic forces between these shunts and the cylinder heads.
  • This tightening is carried out by means of transverse beams, not shown, situated above the shunts, and fixed at their ends by screws which are screwed into parts welded to the master plates 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Regulation Of General Use Transformers (AREA)

Description

La présente invention concerne une bobine électrique d'inductance shunt. Il est connu d'utiliser de telles bobines pour compenser l'énergie réactive capacitive des longues lignes de transport d'énergie électrique à haute tension et pour augmenter la stabilité des réseaux.The present invention relates to an electric shunt inductor. It is known to use such coils to compensate for the capacitive reactive energy of long high-voltage electric power lines and to increase the stability of networks.

Elles se placent alors, soit directement entre ligne et neutre des réseaux, généralement à haute tension, soit aux bornes d'enroulements de compensation de transformateurs ou auto-transformateurs. Dans tous les cas, elles ont la particularité, lorsqu'elles sont alimentées sous la tension nominale, de débiter leur puissance nominale, donc d'être le siège de pertes constantes, quelle que soit la charge, à tension constante. Il est donc particulièrement intéressant de minimiser le plus possible les pertes. On connaît plusieurs solutions pour diminuer les pertes: par augmentation de la masse de cuivre afin de diminuer les densités de courant et donc les pertes dans l'enroulement; par augmentation de la masse de tôles magnétiques afin de diminuer les densités de flux et donc les pertes dans le circuit magnétique.They are then placed either directly between the line and neutral of the networks, generally at high voltage, or at the terminals of windings for compensating transformers or auto-transformers. In all cases, they have the particularity, when they are supplied at nominal voltage, to output their nominal power, and therefore to be the seat of constant losses, whatever the load, at constant voltage. It is therefore particularly interesting to minimize losses as much as possible. Several solutions are known for reducing losses: by increasing the mass of copper in order to reduce the current densities and therefore the losses in the winding; by increasing the mass of magnetic sheets in order to reduce the flux densities and therefore the losses in the magnetic circuit.

Ces solutions entraînent donc malheureusement une augmentation de la masse du cuivre ou/ et des tôles et influent en outre sur le dimensionnement général, la masse de chaudronnerie et le diélectrique. Cette augmentation de masse des tôles ayant également une incidence sur le niveau de bruit, les vibrations et les échauffements maxima localisés.These solutions therefore unfortunately lead to an increase in the mass of copper and / or sheets and also influence the general design, the mass of boilermaking and the dielectric. This increase in mass of the sheets also having an impact on the noise level, the vibrations and the maximum localized heating.

Or, on sait par ailleurs qu'au voisinage du circuit magnétique, des tôles d'habillage (ou tôles maîtresses) du circuit magnétique et des supports d'enroulements, la valeur de l'induction, dans le cas d'une grande bobine d'inductance shunt, peut être plusieurs fois supérieure à celle qui apparaît dans les zones homologues par exemple des transformateurs, et ainsi crée, outre des pertes additionnelles, des points chauds importants.However, we also know that in the vicinity of the magnetic circuit, covering sheets (or master sheets) of the magnetic circuit and winding supports, the value of the induction, in the case of a large coil d 'shunt inductance, can be several times higher than that which appears in the homologous zones for example of the transformers, and thus creates, in addition to additional losses, important hot spots.

Le brevet britanique 983 481 décrit une bobine d'inductance shunt en référence aux figures 1 et 2. Cette bobine compote des culasses 2 dont la largeur est égale au diamètre de la bobine 1. Les efforts de compression dûs aux forces électromagnétiques sont supportés par une colonne centrale 3 en matériau isolant, mais au-delà du diamètre de la colonne centrale 3, les culasses ne reposent que sur la bobine 1 aussi, pour reporter les efforts uniquement sur la colonne centrale 3 on soude sur les culasses 2 des barreaux 9 qui assurent la rigidité des culasses et évitent de faire porter les efforts sur la bobine 1. La figure 3 et le texte qui s'y réfère page 3 lignes 33 à 58 décrit une alternative qui consiste à utiliser une culasse dont la largeur est la même que le diamètre de la colonne support 3 et à ajouter une traverse en tôles feuilletés 10 en forme de U renversé, les efforts s'exerçant sur cette traverse étant transmis à la culasse et de là à la colonne support 3.British patent 983 481 describes a shunt inductor with reference to Figures 1 and 2. This coil compasses cylinder heads 2 whose width is equal to the diameter of the coil 1. The compressive forces due to electromagnetic forces are supported by a central column 3 made of insulating material, but beyond the diameter of the central column 3, the cylinder heads only rest on the coil 1 also, to transfer the forces only to the central column 3, the rods 2 of the bars 9 are welded ensure the rigidity of the cylinder heads and avoid placing stress on the coil 1. Figure 3 and the text referring to it on page 3 lines 33 to 58 describes an alternative which consists in using a cylinder head whose width is the same as the diameter of the support column 3 and adding a cross-member made of laminated sheets 10 in the shape of an inverted U, the forces exerted on this cross-member being transmitted to the cylinder head and from there to the support column 3.

Une telle disposition qui supprime effectivement les points chauds présente cependant des inconvénients. En effet, une telle traverse en forme de U renversé dont les jambes verticales rejoignent la bobine est très gênante pour la distance d'isolement nécessaire aux sorties des connexions, en outre, pour les bobines de hautes tensions atteignant de grandes dimensions, une telle traverse en U renversé doit nécessairement être réalisée par un empilement qui comprend dans chaque plan trois tôles enchevêtrées, ou alors il faut réaliser une machine spéciale de grande dimension découpant directement la tôle de cette forme.Such an arrangement which effectively eliminates hot spots has drawbacks, however. Indeed, such a cross in the shape of an inverted U whose vertical legs join the coil is very troublesome for the isolation distance required at the outputs of the connections, in addition, for high voltage coils reaching large dimensions, such a cross in inverted U must necessarily be carried out by a stack which comprises in each plane three tangled sheets, or else a special large machine must be cut directly cutting the sheet of this shape.

Dans les deux cas on arrive à une solution très coûteuse et compliquée.In both cases we arrive at a very expensive and complicated solution.

L'invention a pour but de pallier ces inconvénients.The invention aims to overcome these drawbacks.

L'invention a donc pour objet une bobine électrique d'inductance shunt comprenant un cadre magnétique formé de deux jambes réunies par une culasse supérieure et une culasse inférieure, un enroulement électrique situé an centre du cadre autour d'un noyau central, parallèlement aux jambes, la largeur L des culasses étant inférieure au diamètre de l'enroulement électrique et voisin du diamètre dudit noyau central, au moins un shunt magnétique étant placé à l'extérieur d'au moins l'une des deux culasses par rapport à l'intérieur du cadre, la longueur dudit shunt étant supérieure à la largeur L de la culasse de manière à la dépasser de chaque côté, ledit shunt magnétique étant constitué par un empilement de tôles, stratifié perpendiculairement au sens de statification de l'empilement des tôles des culasses, le plan des tôles dudit shunt étant parallèle à l'axe de la bobine, caractérisée en ce que ledit shunt a la forme d'un parallèlépipède rectangle rectiligne.The invention therefore relates to an electric shunt inductor comprising a magnetic frame formed by two legs joined by an upper yoke and a lower yoke, an electrical winding located in the center of the frame around a central core, parallel to the legs , the width L of the cylinder heads being less than the diameter of the electrical winding and close to the diameter of said central core, at least one magnetic shunt being placed on the outside of at least one of the two cylinder heads relative to the inside of the frame, the length of said shunt being greater than the width L of the cylinder head so as to exceed it on each side, said magnetic shunt being constituted by a stack of sheets, laminated perpendicular to the direction of statification of the stack of sheets of cylinder heads , the plane of the sheets of said shunt being parallel to the axis of the coil, characterized in that said shunt has the shape of a rectilinear rectangle parallelepiped.

Selon une réalisation préférée de l'invention, deux dits shunts magnétiques sont placés au-dessus de la culasse supérieure, situés respectivement de part et d'autre d'une première traverse de serrage du circuit magnétique, et en ce que deux dits shunts magnétiques sont placés au dessous de la culasse inférieure, dont l'un, entre une seconde traverse de serrage du circuit magnétique et une poutre de fixation de la bobine au fond d'une cuve et dont l'autre, entre l'autre côté de ladite traverse et une seconde poutre de fixation de la bobine au fond de la cuve.According to a preferred embodiment of the invention, two said magnetic shunts are placed above the upper yoke, located respectively on either side of a first clamping crosspiece of the magnetic circuit, and in that two said magnetic shunts are placed below the lower yoke, one of which, between a second crosspiece for clamping the magnetic circuit and a beam for fixing the coil to the bottom of a tank, and the other of which, between the other side of said crosspiece and a second beam for fixing the coil to the bottom of the tank.

Avantageusement, la longueur de dépassement des shunts de chaque côté des culasses est voisine de l'épaisseur des culasses.Advantageously, the protruding length of the shunts on each side of the cylinder heads is close to the thickness of the cylinder heads.

L'expérience a montré qu'avec de tels shunts rectilignes, aucun point chaud n'atteint la température maximale limite admissible et qu'il n'est pas du tout nécessaire, pour obtenir ce résultat, que de tels shunts descendent jusqu'au contact avec la bobine. Il en résulte une construction beaucoup plus simple et un plus grand espace d'isolement pour les sorties des connexions.Experience has shown that with such rectilinear shunts, no hot spot reaches the maximum permissible limit temperature and that it is not at all necessary, to obtain this result, that such shunts descend to the point of contact. with the coil. This results in a much simpler construction and a greater isolation space for the outputs of the connections.

L'invention sera bien comprise à la lumière de la description d'un exemple de réalisation de l'invention, faite ci-après en regard du dessin annexé dans lequel:

  • La figure 1 représente une bobine d'inductance shunt selon l'invention.
  • La figure 2 montre en perspecive une partie de la figure 1.
  • La figure 3 est une vue schématique partielle correspondant à une vue en coupe selon III-III de la figure 1 dans laquelle on a oté l'ensemble de serrage de la culasse.
The invention will be clearly understood in the light of the description of an exemplary embodiment of the invention, given below with reference to the appended drawing in which:
  • Figure 1 shows a shunt inductor according to the invention.
  • Figure 2 shows a perspective view of part of Figure 1.
  • Figure 3 is a partial schematic view corresponding to a sectional view along III-III of Figure 1 in which we removed the clamping assembly of the cylinder head.

La bobine d'inductance shunt représentée sur les figures, comprend un cadre magnétique feuilleté en tôles comprenant deux jambes verticales 1 et 2 réunies par une culasse supérieure 3 et une culasse inférieure 4. Au centre de ce cadre magnétique est placé en enroulement électrique 6 en couches dont la figure 3 montre la forme de la section. Cet enroulement est situé autour d'un noyau 7 constitué dans l'example décrit par une succession de tronçons de fer et d'entrefers. Un tronçon de fer 8 est représenté sur les figures 1 et 3.The shunt inductor shown in the figures comprises a laminated magnetic sheet frame comprising two vertical legs 1 and 2 joined by an upper yoke 3 and a lower yoke 4. In the center of this magnetic frame is placed in electric winding 6 in layers whose figure 3 shows the shape of the section. This winding is located around a core 7 constituted in the example described by a succession of sections of iron and air gaps. An iron section 8 is shown in FIGS. 1 and 3.

La largeur des culasses 5 et 4 est voisine du diamètre du noyau central 7.The width of the yokes 5 and 4 is close to the diameter of the central core 7.

Le cadre magnétique est serré au moyen d'un dispositif de serrage 9 serrant une traverse supérieure 10 et une traverse inférieure 11 contre les culasses. Dans le sens transversal, les culasses inférieure et supérieure sont maintenues serrées par des pièces 12 dont la section triangulaire est visible sur la figure 2, soudées chacune sur une tôle maîtresse 13 enserrant le paquet de tôles. Les traverses de serrage 10 et 11 supérieure et inférieure sont fixées par des moyens non représentés à ces pièces de serrage 12. L'ensemble du cadre comporte en outre des frettes non représentées.The magnetic frame is clamped by means of a clamping device 9 clamping an upper cross member 10 and a lower cross member 11 against the cylinder heads. In the transverse direction, the lower and upper yokes are held tight by pieces 12, the triangular section of which is visible in FIG. 2, each welded to a master sheet 13 enclosing the pack of sheets. The upper and lower clamping crosspieces 10 and 11 are fixed by means not shown to these clamping pieces 12. The whole of the frame further comprises hoops not shown.

La bobine d'inductance ainsi constituée est disposée dans une cuve dont la figure 1 ne montre que le fond 14 et la figure 3 le couvercle 15 et la paroi latérale 16. L'ensemble est fixé au fond de la cuve par le moyen de deux poutres métalliques 17, 18.The inductance coil thus formed is placed in a tank, Figure 1 shows only the bottom 14 and Figure 3 the cover 15 and the side wall 16. The assembly is fixed to the bottom of the tank by means of two metal beams 17, 18.

Tout autour de la cuve, sont disposés des shunts magnétiques 19 (figure 3) constitués chacun par des petits paquets de tôles, afin d'éviter les pertes dans la cuve.All around the tank are arranged magnetic shunts 19 (FIG. 3) each consisting of small bundles of sheets, in order to avoid losses in the tank.

Selon l'invention, deux shunts magnétiques 20 et 21 rectilignes de forme parallélépipèdique rectangle sont situés au-dessus de la culasse supérieure 3 de part et d'autre de la traverse supérieure de serrage 10. La figure 2 montre bien la disposition de ces shunts et leur stratification perpendiculaire à celle de la culasse 3 et parallèle à l'axe de la bobine. Ces shunts ont une longueur supérieure à la largeur L de la culasse de façon à dépresser de chaque côté de la culasse d'une longueur avantageusement voisine de l'épaisseur e de la culasse. Au-dessous de la culasse inférieure 4 sont également placés des shunts magnétiques 22 et 23, également rectilignes, respectivement entre la traverse inférieure 11 et la poutre 17 et entre la traverse inférieure 11 et la poutre 18. De la même manière que les shunts situés sur la culasse supérieure, ces shunts ont un sens de stratification perpendiculaire à celui de la culasse inférieure et ils dépassent sa largeur de chaque côté d'une longueur égale à l'épaisseur e de la culasse. Ces shunts 20, 21, 22, 23 situés à l'extérieur du cadre, sont fixés très simplement car il n'ont pas à résister à la pression de serrage du cadre, néanmoins ils doivent être suffisamment pressés contre leur culasse respective pour éliminer les risques de vibrations et de bruit qui pourraient résulter des efforts électromagnétiques entre ces shunts et les culasses. Ce serrage est effectué par l'intermédiaire de poutres transversales non représentées, situées au-dessus des shunts, et fixées à leurs extrémités par des vis venant se visser dans des pièces soudées aux tôles maîtresses 13. Ils permettent d'éviter en très grande partie les pertes dans les tôles maîtresses 13 (figures 2 et 3), dans les pièces de serrage 12, les traverses de serrage supérieure et inférieure 10, 11 et les poutres de fixation et de support 17, 18 de la bobine dans la cuve, ceci en canalisant les lignes de flux 24 comme on le voit sur la figure 3 vers les shunts (20 sur la figure 3). Des isolants 25 sont interposés entre les shunts et les culasses.According to the invention, two magnetic shunts 20 and 21 rectilinear of rectangular parallelepiped shape are located above the upper yoke 3 on either side of the upper clamping crosspiece 10. Figure 2 shows the arrangement of these shunts and their stratification perpendicular to that of the yoke 3 and parallel to the axis of the coil. These shunts have a length greater than the width L of the cylinder head so as to depress on each side of the cylinder head to a length advantageously close to the thickness e of the cylinder head. Below the lower yoke 4 are also placed magnetic shunts 22 and 23, also rectilinear, respectively between the lower cross member 11 and the beam 17 and between the lower cross member 11 and the beam 18. In the same way as the shunts located on the upper cylinder head, these shunts have a direction of stratification perpendicular to that of the lower cylinder head and they exceed its width on each side by a length equal to the thickness e of the cylinder head. These shunts 20, 21, 22, 23 located outside the frame, are fixed very simply because they do not have to resist the clamping pressure of the frame, nevertheless they must be sufficiently pressed against their respective cylinder head to eliminate the risks of vibrations and noise which could result from electromagnetic forces between these shunts and the cylinder heads. This tightening is carried out by means of transverse beams, not shown, situated above the shunts, and fixed at their ends by screws which are screwed into parts welded to the master plates 13. They make it possible to largely avoid the losses in the master plates 13 (FIGS. 2 and 3), in the clamping pieces 12, the upper and lower clamping crosspieces 10, 11 and the fixing and support beams 17, 18 of the coil in the tank, this by channeling the flow lines 24 as seen in Figure 3 to the shunts (20 in Figure 3). Insulators 25 are interposed between the shunts and the cylinder heads.

Dans le cas d'une bobine shunt dont le serrage est effectué non pas par le centre, comme dans l'exemple décrit, mais par les côtés, les shunts 20 et 21 sont remplacés par un shunt unique situé au centre de la culasse, de même évidemment pour les shunts 22 et 23.In the case of a shunt coil whose tightening is carried out not by the center, as in the example described, but by the sides, the shunts 20 and 21 are replaced by a single shunt located in the center of the cylinder head, even obviously for shunts 22 and 23.

Les essais effectués sur une bobine d'inductance de 100 Méga volt-ampères réactifs à très haute tension ont montré que le dispositif selon l'invention a permis de réduire de plus de 15% les pertes totales de la bobine d'inductance, et d'éliminer les points chauds.Tests carried out on a reactive coil of 100 Mega volt-amperes reactive at very high voltage showed that the device according to the invention made it possible to reduce by more than 15% the total losses of the inductance coil, and d '' eliminate hot spots.

Claims (3)

1. An electrical shunt inductor coil comprising a magnetic frame made of two members (1, 2) interconnected by an upper yoke (3) and a lower yoke (4), an electrical winding (6) situated at the center of the frame around a central core (7) parallelly to the members, the width L of the yokes being smaller than the diameter of the electrical winding and close to the diameter of said central core, at least one magnetic shunt (20, 21) being placed on the outside of at least one of the two yokes with respect to the inside of the frame, the length of said shunt being greater than the width L of the yoke so as to extend beyond it on both sides, said magnetic shunt (20, 21) being constituted by a stack of laminations which is stratified perpendicularly to the direction of stratification of the laminations of the yokes, the plane of the laminations of said shunt being parallel to the axis of the coil, characterized in that said magnetic shunt (20, 21) has the form of a rectangular retilinear parallelepiped.
2. An electrical shunt inductor coil according to claim 1, characterized in that two said magnetic shunts (20, 21) are placed above the upper yoke (3), situated respectively on either side of a first tightening transverse beam (10) of said magnetic circuit, and that two said magnetic shunts (22, 23) are placed below the lower yoke (4), one of them (22) between a second tightening transverse beam (11) of the magnetic circuit and a beam (17) for fixing the coil on the bottom of a container (14) and the other one (23) between the other side of said transverse beam (11) and a second beam (18) for fixing the coil on the bottom of the container.
3. An electrical shunt inductor coil according to any one of claims 1 or 2, characterized in that the extension length of the shunts beyond the yokes on either side thereof is near the thickness e of the yokes.
EP82110899A 1981-11-30 1982-11-25 Electrical shunt reactor Expired EP0081153B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8122353 1981-11-30
FR8122353 1981-11-30

Publications (2)

Publication Number Publication Date
EP0081153A1 EP0081153A1 (en) 1983-06-15
EP0081153B1 true EP0081153B1 (en) 1987-05-20

Family

ID=9264483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82110899A Expired EP0081153B1 (en) 1981-11-30 1982-11-25 Electrical shunt reactor

Country Status (5)

Country Link
US (1) US4485368A (en)
EP (1) EP0081153B1 (en)
JP (1) JPS58105532A (en)
BR (1) BR8206897A (en)
DE (1) DE3276400D1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE35409E (en) * 1982-09-24 1996-12-24 Moore; Sidney D. Electrically addressable opto-electronic indicator for making dynamic evaluations of microscopic or larger subjects
DE3703026C1 (en) * 1987-02-02 1988-09-01 May & Christe Gmbh Ballast for gas discharge lamps
US7236086B1 (en) 1993-06-14 2007-06-26 Vlt, Inc. Power converter configuration, control, and construction
FR2723339B1 (en) * 1994-08-08 1996-10-31 Neopost Ind POSTAGE MACHINE COMPRISING AN INK JET PRINTHEAD
EP2157005B1 (en) * 2007-06-13 2013-12-25 Mitsubishi Electric Corporation Railroad reactor device
JP2010171313A (en) * 2009-01-26 2010-08-05 Japan Ae Power Systems Corp Stationary induction electrical apparatus
CN102969133B (en) * 2012-11-23 2015-04-22 中国西电电气股份有限公司 Magnetic shunt compaction device of tightening belt structure
CN103248057B (en) * 2013-04-27 2016-01-20 无锡赛晶电力电容器有限公司 A kind of intelligent cabinet type reactive power compensation device
CN110085403B (en) * 2019-05-21 2024-04-26 保定天威保变电气股份有限公司 Magnetic shielding structure and magnetic shielding method for end part of three-post iron core of transformer
CN110349730A (en) * 2019-06-04 2019-10-18 吴江变压器有限公司 A kind of magnetic structure of iron-core reactor
CN113744969B (en) * 2021-09-07 2022-10-14 吴江变压器有限公司 Neutral point grounding reactor with magnetism increasing structure
CN113963921B (en) * 2021-10-25 2023-05-12 吴江变压器有限公司 Single-phase iron core reactor with uniform magnetic density
CN113903566B (en) * 2021-11-10 2023-05-12 吴江变压器有限公司 Three-phase reactor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195087A (en) * 1963-02-27 1965-07-13 Gen Electric Electrical shunt reactor
US3195082A (en) * 1963-02-27 1965-07-13 Gen Electric Electrical reactor
GB983481A (en) * 1963-02-27 1965-02-17 Gen Electric Improvements in electrical reactors
FR1409412A (en) * 1964-07-16 1965-08-27 Comp Generale Electricite Improvements to the reactance coils

Also Published As

Publication number Publication date
JPS58105532A (en) 1983-06-23
US4485368A (en) 1984-11-27
JPH0114685B2 (en) 1989-03-14
BR8206897A (en) 1983-10-04
DE3276400D1 (en) 1987-06-25
EP0081153A1 (en) 1983-06-15

Similar Documents

Publication Publication Date Title
EP0081153B1 (en) Electrical shunt reactor
AU2010321637B2 (en) Electrical transformer assembly
FR2473804A1 (en) STATOR FOR ALTERNATOR
OA13204A (en) Device for measuring an electric current, current sensor, electric trip unit and cut-off device comprising such a measuring device.
EP0336337A1 (en) Current limiter
CA2822304A1 (en) Transformer-rectifier unit
CA1100585A (en) Polyphase transformer of high mechanical resistance
EP0020215B1 (en) Induction reheating furnace with travelling field
BE1004215A3 (en) Clamp welding device with transformers.
EP3229247B1 (en) Magnetic component, resonant electric circuit, electric converter and electrical system
EP0043523B1 (en) Electrical shunt reactor for an electric power transmission line, and method of making such reactor
WO2016046499A1 (en) Magnetic core of rotating transformer
EP1993111B1 (en) Cooling of the magnetic core of an induction coil.
FR2487974A1 (en)
US2447673A (en) Reactor with movable core member
EP0129160A2 (en) Continuous-induction-heating arrangement for metallic products
FR3081254A1 (en) PLANAR COIL AND METHOD FOR MANUFACTURING A PLANAR COIL
WO2021116632A1 (en) Electrotechnical device for an aircraft
CA1244899A (en) Wire wound magnetic circuit distribution transformer
CH361336A (en) Reactance coil
FR2484135A1 (en) Current supply plate for circuit breaker - comprises lamellas of equal thickness of copper and aluminium bolted together through accurately positioned holes
EP0061383A1 (en) Switch with indifferent working position and its application to a relay
BE442769A (en)
BE507511A (en)
BE566424A (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19831214

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALSTHOM

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

REF Corresponds to:

Ref document number: 3276400

Country of ref document: DE

Date of ref document: 19870625

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 82110899.0

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19960812

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960814

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960912

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19961011

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19971130

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19971125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980801

EUG Se: european patent has lapsed

Ref document number: 82110899.0

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST