EP1033736B1 - Magnetic actuator with pivoting armature, in particular for a circuit breaker, and circuit breaker with such an actuator - Google Patents
Magnetic actuator with pivoting armature, in particular for a circuit breaker, and circuit breaker with such an actuator Download PDFInfo
- Publication number
- EP1033736B1 EP1033736B1 EP00410016A EP00410016A EP1033736B1 EP 1033736 B1 EP1033736 B1 EP 1033736B1 EP 00410016 A EP00410016 A EP 00410016A EP 00410016 A EP00410016 A EP 00410016A EP 1033736 B1 EP1033736 B1 EP 1033736B1
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- EP
- European Patent Office
- Prior art keywords
- blade
- branch
- bevelled
- free end
- actuator
- 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 - Lifetime
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/163—Details concerning air-gaps, e.g. anti-remanence, damping, anti-corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2472—Electromagnetic mechanisms with rotatable armatures
Definitions
- the invention relates to a magnetic actuator, in particular for opening the contacts of a breaking device such as a circuit breaker and / or tripping said circuit breaker in the event of an electrical fault, this actuator comprising a magnetic circuit formed by a ferromagnetic yoke, said cylinder head comprising a first and second branches substantially parallel to each other connected by a transverse base piece, a movable pallet mounted articulated by one of its ends on the free end of the first branch and cooperating at its other end with the free end of the second branch, means for producing a magnetic field capable of moving the pallet in rotation between an open position of rest of the pallet corresponding to the normal operation of the apparatus and an active position corresponding to the appearance of a defect in the apparatus, in which the free end of the pallet is held in the repositioning position minimal luctance with respect to the free end of the second branch.
- a magnetic actuator in particular for opening the contacts of a breaking device such as a circuit breaker and / or tripping said circuit breaker in the event of
- the yoke is U-shaped and comprises two branches of the same length, while the pallet is formed by a rectangular section plate.
- the attraction force generated by the coil in case of electrical fault is minimum at the beginning of closing of the pallet, and grows as the pallet closes.
- the initial speed of the pallet is reduced, and consequently the reaction time of the circuit breaker following an electrical fault is relatively high.
- CH-A-72323 discloses a magnetic actuator according to the preamble of claim 1.
- the present invention aims to achieve an actuator and a circuit breaker incorporating it, having a reduced reaction time in case of occurrence of an electrical fault.
- the subject of the present invention is a magnetic actuator, this actuator being characterized in that the said pallet is L-shaped and comprises a first arm articulated on the first branch of the cylinder head and a second arm substantially perpendicular to the first arm. , and cooperating with the second leg of the yoke, the second leg and the second arm each having at their free end a beveled portion, the two beveled portions being of complementary shape and adapted to be brought into a position in which said bevelled portions are facing one another and substantially parallel to each other, in the closed position of the pallet.
- the air gap between the beveled parts and the bevelled parts themselves are arranged with respect to the axis of rotation, in such a way that the torque associated with the attraction force of the pallet on the cylinder head is maximum in the open position of the pallet and decreases when the pallet moves from the open position to the closed position.
- an actuator A for use in an electrical protection device such as a circuit breaker.
- This circuit breaker (not shown) is intended to be placed in an electrical circuit comprising electrical devices, in order to protect said devices in case of overcurrent or short circuit.
- This actuator A is formed mainly by a ferromagnetic yoke 1 which consists of two lateral branches 2,3 connected by a base part 4.
- the magnetic circuit thus formed is closed by a pallet 5 capable of pivoting about an axis of rotation X between an open position (Fig. 1) and a closed position (Fig.
- the pallet 5 has a first end 5a articulated on the free end 2a of a 2, said first, branches 2, 3 of the yoke 1, and a second end 5b adapted to be brought facing the free end 3a of the second leg 3 of the yoke 1 in order to close the magnetic circuit
- the pallet 5 is returned to the open position by a return spring, not shown.
- This open position corresponds to a normal operating state of the circuit breaker.
- This actuator A also comprises a coil 6 traversed by the current which must be monitored, and capable of generating, when an electrical fault occurs in the circuit, a magnetic flux capable of generating a magnetic attraction force between the second end 5b of the pallet 5 and the free end 3a of the second branch 3.
- the pallet 5 pivots in the closing direction until its free end 5b comes into contact with the free end 3a of the second branch 3, which causes the triggering of the circuit breaker and / or the opening of the contacts of said circuit breaker.
- the pallet 5 is shaped in L and comprises a first arm 7 mounted articulated by one 7a of its ends, on the free end 2a of the first branch 2, and a second arm 8 extending substantially perpendicularly to the first arm 7 and having a free end 8a (5b) intended to cooperate with the free end 3a of the second leg 3.
- these two ends 8a, 3a each comprise a beveled portion a , b and a non-beveled portion c, d.
- the non-bevelled portions c, d are respectively parallel to the first arm 7, as regards the pallet 5, and parallel to the base portion 4, as regards the second leg 3 of the yoke 1.
- These two bevelled parts a, b form an angle with respect to the second arm 8 and the second arm 3 respectively of approximately 45 ° and are arranged in such a way that in the closed position of the pallet 5, they are opposite one another relative to the other by extending parallel to each other.
- the pallet 5 and the yoke 1 are offset parallel to the longitudinal direction of the base portion 4.
- the position of the gap e between the two ends 5b and 3a respectively of the pallet 5 and the second leg 3, and the arrangement of the bevelled portions a, b have been chosen so that, in the vicinity of the closed position of the pallet 5, the torque exerted at the gap e by the force F of attraction, relative to the axis of rotation, is zero.
- the arrow F representing the force passes through the hinge axis X of the pallet 5, from which a zero torque results.
- the gap e between the two free ends 5b, 3a is inside the coil 6, and in particular in the middle of its length.
- the pallet 5 is open, which corresponds to a normal state of the circuit breaker and the circuit to be protected.
- a magnetic flux is generated by the coil 6. If the attraction force generated by this flux is sufficient to counteract the return force of the spring, an effort will be generated on the free end 5b of the pallet 5 tending to bring it closer to the cylinder head 1.
- the generated torque is very important when the gap e is maximum, as is illustrated in FIG. 3, from which it follows that the speed of movement at the beginning of opening is maximum.
- FIG. 3 illustrates three curves u, v, w representing the evolution as a function of the value of the gap, respectively, of the torque generated by the main air gap situated between the free ends 5b, 3a of the pallet and of the second branch (curve u), the torque generated by the secondary gap at the axis of articulation X (curve v) and the sum of these two pairs (curve w).
- the value of the gap e is represented on the abscissa x on the curve and varies from 0 to 4 mm, while the value of the forces developed is represented on the y-ordinate and varies from 0 to 200 mm.N.
- Figure 4 also illustrates three curves u, v, w representing the same data but for an actuator using a pallet of the conventional type as shown in Figure 2a. It can be seen in FIG. 3 that the force initially generated when the pallet 5 is open, by the main air gap (curve u), is around 160 and is therefore very high compared with that (about 4 mm.N). generated in the case of using a standard palette. This is because, for the same opening stroke of the pallet, and taking into account the existence of bevelled parts, the value of the gap in the case of the invention is decreased, compared to that of the gap of the prior art in which the air gap corresponded to the stroke of the pallet.
- the value of the force in an actuator according to the invention is greater than that generated in the prior art.
- the distance between the direction of the force F and the X axis is maximum in the open position of the pallet, since this direction is parallel to the branches 2,3 of the cylinder head 1.
- the value of the torque is maximum in this position.
- the torque F generated by the main air gap decreases to a value of about 70 mm.N.
- the arrow F illustrating the force turns in the counterclockwise direction to a position shown in Figure 2.
- the direction of the force F substantially passes through the axis of rotation X and the couple is therefore of a very low value.
- the presence of the air gap e inside the coil 6 and in particular in the middle of its length also contributes to increasing the force, since this makes it possible to channel the magnetic flux by limiting the magnetic leakage fluxes generated for high currents.
- the force goes from a maximum value to a minimum value (FIG. 3), unlike in the case of the actuator of the prior art (FIG. the opposite occurs, and this despite an increase in the inertia of the palette.
- this decay effect can be increased so as to obtain an electromagnetic brake of the pallet, preventing said pallet from impacting its end stop too violently.
Abstract
Description
L'invention concerne un actionneur magnétique, notamment pour ouvrir les contacts d'un appareil de coupure tel un disjoncteur et/ou déclencher ledit disjoncteur en cas de défaut électrique, cet actionneur comprenant un circuit magnétique formé par une culasse ferromagnétique, ladite culasse comprenant une première et une seconde branche sensiblement parallèles entre elles reliées par une pièce de base transversale, une palette mobile montée articulée par l'une de ses extrémités sur l'extrémité libre de la première branche et coopérant par son autre extrémité avec l'extrémité libre de la seconde branche, un moyen de production d'un champs magnétique apte à déplacer la palette en rotation entre une position ouverte de repos de la palette correspondant au fonctionnement normal de l'appareil et une position active correspondant à l'apparition d'un défaut électrique dans l'appareil, dans laquelle l'extrémité libre de la palette est maintenue en position de réluctance minimale par rapport à l'extrémité libre de la seconde branche.
Dans les actionneurs connus du genre précédemment mentionné, la culasse est en forme de U et comprend deux branches de même longueur, tandis que la palette est formée par une plaque de section rectangulaire. Dans ce type d'actionneur, l'effort d'attraction généré par la bobine en cas de défaut électrique est minimum en début de fermeture de la palette, et croît au fur et à mesure que la palette se ferme. Il en résulte que la vitesse initiale de la palette est réduite, et en conséquence que le temps de réaction du disjoncteur suite à un défaut électrique est relativement élevé.
Le document CH-A-72 323 décrit un actionneur magnétique selon le préambule de la revendication 1.
La présente invention a pour but de réaliser un actionneur ainsi qu'un disjoncteur l'incorporant, présentant un temps de réaction réduit en cas d'apparition d'un défaut électrique.The invention relates to a magnetic actuator, in particular for opening the contacts of a breaking device such as a circuit breaker and / or tripping said circuit breaker in the event of an electrical fault, this actuator comprising a magnetic circuit formed by a ferromagnetic yoke, said cylinder head comprising a first and second branches substantially parallel to each other connected by a transverse base piece, a movable pallet mounted articulated by one of its ends on the free end of the first branch and cooperating at its other end with the free end of the second branch, means for producing a magnetic field capable of moving the pallet in rotation between an open position of rest of the pallet corresponding to the normal operation of the apparatus and an active position corresponding to the appearance of a defect in the apparatus, in which the free end of the pallet is held in the repositioning position minimal luctance with respect to the free end of the second branch.
In known actuators of the kind mentioned above, the yoke is U-shaped and comprises two branches of the same length, while the pallet is formed by a rectangular section plate. In this type of actuator, the attraction force generated by the coil in case of electrical fault is minimum at the beginning of closing of the pallet, and grows as the pallet closes. As a result, the initial speed of the pallet is reduced, and consequently the reaction time of the circuit breaker following an electrical fault is relatively high.
CH-A-72323 discloses a magnetic actuator according to the preamble of claim 1.
The present invention aims to achieve an actuator and a circuit breaker incorporating it, having a reduced reaction time in case of occurrence of an electrical fault.
A cet effet, la présente invention a pour objet un actionneur magnétique, cet actionneur étant caractérisé en ce que la palette précitée est conformée en L et comprend un premier bras articulé sur la première branche de la culasse et un second bras sensiblement perpendiculaire au premier bras, et coopérant avec la seconde branche de la culasse, la seconde branche et le second bras comportant chacun à leur extrémité libre une partie biseautée, les deux parties biseautées étant de forme complémentaire et aptes à être amenées dans une position dans laquelle lesdites parties biseautées sont en regard l'une par rapport à l'autre et sensiblement parallèles entre elles, en position de fermeture de la palette.For this purpose, the subject of the present invention is a magnetic actuator, this actuator being characterized in that the said pallet is L-shaped and comprises a first arm articulated on the first branch of the cylinder head and a second arm substantially perpendicular to the first arm. , and cooperating with the second leg of the yoke, the second leg and the second arm each having at their free end a beveled portion, the two beveled portions being of complementary shape and adapted to be brought into a position in which said bevelled portions are facing one another and substantially parallel to each other, in the closed position of the pallet.
Selon une réalisation particulière de l'invention, l'entrefer entre les parties biseautées et les parties biseautées elles-mêmes sont agencées par rapport à l'axe de rotation, de telle façon que le couple associé à l'effort d'attraction de la palette sur la culasse soit maximum en position ouverte de la palette et diminue lorsque la palette passe de la position ouverte à la position fermée.According to a particular embodiment of the invention, the air gap between the beveled parts and the bevelled parts themselves are arranged with respect to the axis of rotation, in such a way that the torque associated with the attraction force of the pallet on the cylinder head is maximum in the open position of the pallet and decreases when the pallet moves from the open position to the closed position.
D'autres avantages et caractéristiques ressortiront plus clairement de la description suivante de modes particuliers de réalisation, donnés à titre d'exemples non limitatifs, et représentés aux dessins annexés sur lesquels :
- Les figures 1 et 2 sont deux vues schématiques de face, illustrant un actionneur selon l'invention, respectivement dans une position ouverte et dans une position fermée,
- La figure 2a est une vue similaire aux figures 1 et 2, mais illustrant l'art antérieur,
- les figures 3 et 4 sont deux représentations graphiques illustrant l'évolution des couples développés par les différents entrefers, respectivement dans le cas d'un actionneur selon l'invention, et dans le cas d'un actionneur selon l'art antérieur, et
- la figure 5 est une vue similaire à la figure 2, mais représentant la force exercée par l'entrefer principal, par rapport à l'axe de rotation de la palette.
- FIGS. 1 and 2 are two diagrammatic front views, illustrating an actuator according to the invention, respectively in an open position and in a closed position,
- FIG. 2a is a view similar to FIGS. 1 and 2, but illustrating the prior art,
- FIGS. 3 and 4 are two graphical representations illustrating the evolution of the torques developed by the different air gaps, respectively in the case of an actuator according to the invention, and in the case of an actuator according to the prior art, and
- Figure 5 is a view similar to Figure 2, but showing the force exerted by the main air gap, relative to the axis of rotation of the pallet.
Sur les figures 1,2 et 5, on voit un actionneur A destiné à être utilisé dans un appareil de protection électrique tel un disjoncteur. Ce disjoncteur (non représenté) est destiné à être placé dans un circuit électrique comportant des appareils électriques, afin de protéger lesdits appareils en cas de surintensité ou de court-circuit.
Cet actionneur A est formé principalement par une culasse ferromagnétique 1 qui se compose de deux branches latérales 2,3 reliées par une pièce de base 4. Le circuit magnétique ainsi formé est fermé par une palette 5 susceptible de pivoter autour d'un axe de rotation X entre une position ouverte (fig. 1) et une position fermée (fig.2). A cet effet, et de manière connue en soi, la palette 5 présente une première extrémité 5a montée articulée sur l'extrémité libre 2a de l'une 2, dite première, des branches 2 ,3 de la culasse 1, et une seconde extrémité 5b apte à être amenée en regard avec l'extrémité libre 3a de la seconde branche 3 de la culasse 1 afin de fermer le circuit magnétique La palette 5 est rappelée en position ouverte par un ressort de rappel, non représenté. Cette position ouverte correspond à un état de fonctionnement normal du disjoncteur. Cet actionneur A comporte également une bobine 6 traversé par le courant qui doit être surveillé, et apte à générer lors de l'apparition d'un défaut électrique dans le circuit, un flux magnétique susceptible d'engendrer une force d'attraction magnétique entre la seconde extrémité 5b de la palette 5 et l'extrémité libre 3a de la seconde branche 3. Lorsque cette force d'attraction F est supérieure à la force de rappel du ressort précité, la palette 5 pivote dans le sens de la fermeture jusqu'à ce que son extrémité libre 5b entre en contact avec l'extrémité libre 3a de la seconde branche 3, ce qui provoque le déclenchement du disjoncteur et/où l'ouverture des contacts dudit disjoncteur.
Conformément à l'invention, la palette 5 est conformée en L et comporte un premier bras 7 monté articulé par l'une 7a de ses extrémités, sur l'extrémité libre 2a de la première branche 2, et un second bras 8 s'étendant sensiblement perpendiculairement au premier bras 7 et comportant une extrémité libre 8a (5b) destinée à coopérer avec l'extrémité libre 3a de la seconde branche 3. On voit également sur ces figures, que ces deux extrémités 8a,3a comportent chacune une partie biseautée a, b et une partie non biseautée c, d. Les parties non biseautées c, d sont respectivement parallèles, au premier bras 7, pour ce qui concerne la palette 5, et parallèle à la partie de base 4, pour ce qui concerne la seconde branche 3 de la culasse 1. Ces deux parties biseautées a, b forment un angle par rapport respectivement au second bras 8 et à la seconde branche 3 d'environ 45° et sont agencées de telle manière qu'en position fermée de la palette 5, elles se trouvent en regard l'une par rapport à l'autre en s'étendant parallèlement l'une par rapport à l'autre. On note également que la longueur du premier bras 7 étant inférieure à la longueur de la partie de base 4, la palette 5 et la culasse 1 se trouvent décalées parallèlement à la direction longitudinale de la partie de base 4.
En se reportant plus particulièrement à la figure 5, on voit que la position de l'entrefer e entre les deux extrémités 5b et 3a respectivement de la palette 5 et de la seconde branche 3, ainsi que l'agencement des parties biseautées a,b, ont été choisies de manière que, au voisinage de la position fermée de la palette 5, le couple exercé au niveau de l'entrefer e par la force F d'attraction, par rapport à l'axe de rotation, soit nul. On voit en effet sur cette figure, que la flèche F représentant la force, passe par l'axe d'articulation X de la palette 5, d'où il résulte un couple nul.
On voit également sur les figures 1,2 et 5, que l'entrefer e entre les deux extrémités libres 5b,3a se trouve à l'intérieur de la bobine 6, et en particulier au milieu de sa longueur.In Figures 1,2 and 5, there is shown an actuator A for use in an electrical protection device such as a circuit breaker. This circuit breaker (not shown) is intended to be placed in an electrical circuit comprising electrical devices, in order to protect said devices in case of overcurrent or short circuit.
This actuator A is formed mainly by a ferromagnetic yoke 1 which consists of two
According to the invention, the
Referring more particularly to Figure 5, it is seen that the position of the gap e between the two
It can also be seen in FIGS. 1, 2 and 5 that the gap e between the two
Le fonctionnement de l'actionneur A selon l'invention va être décrit brièvement en référence aux figures :
Sur la figure 1, la palette 5 est ouverte, ce qui correspond à un état normal du disjoncteur et du circuit à protéger. Lors de l'apparition d'un défaut électrique tel une surintensité dans le circuit, un flux magnétique est généré par la bobine 6. Si la force d'attraction engendrée par ce flux est suffisante pour contrecarrer la force de rappel du ressort, un effort sera généré sur l'extrémité libre 5b de la palette 5 tendant à la rapprocher de la culasse 1. Le couple généré est très important lorsque l'entrefer e est maximum, comme ceci est illustré sur la figure 3, d'où il résulte que la vitesse de déplacement en début d'ouverture est maximale.The operation of the actuator A according to the invention will be described briefly with reference to the figures:
In Figure 1, the
La figure 3 illustre trois courbes u,v,w représentant l'évolution en fonction de la valeur de l'entrefer respectivement, du couple généré par l'entrefer principal situé entre les extrémités libres 5b,3a de la palette et de la seconde branche (courbe u), du couple généré par l'entrefer secondaire au niveau de l'axe d'articulation X (courbe v) et de la somme de ces deux couples (courbe w). La valeur de l'entrefer e est représentée en abscisse x sur la courbe et varie de 0 à 4 mm, tandis que la valeur des efforts développés est représentée en ordonnée y et varie de 0 à 200 mm.N. La Figure 4 illustre également trois courbes u,v,w représentant les mêmes données mais pour un actionneur utilisant une palette du type classique telle que représentée sur la figure 2a. On voit sur la figure 3, que l'effort généré au départ lorsque la palette 5 est ouverte, par l'entrefer principal (courbe u), avoisine les 160 et est donc très élevé par rapport à celui (environ 4 mm.N) généré dans le cas de l'utilisation d'une palette standard. Ceci est du au fait que, pour une même course d'ouverture de la palette, et compte tenu de l'existence des parties biseautées, la valeur de l'entrefer dans le cas de l'invention est diminuée, par rapport à celle de l'entrefer de l'art antérieur dans lequel l'entrefer correspondait à la course de la palette. Et l'effort étant inversement proportionnel au carré de la valeur de l'entrefer, il en résulte que la valeur de l'effort dans un actionneur selon l'invention est supérieure à celui généré dans l'art antérieur. En outre, comme ceci est visible sur la figure 1, la distance entre la direction de la force F et l'axe X est maximale en position ouverte de la palette, puisque cette direction est parallèle aux branches 2,3 de la culasse 1. Il en résulte que la valeur du couple est maximale dans cette position.
Au fur et à mesure que la palette 5 se ferme, et donc que la valeur de l'entrefer diminue, le couple F généré par l'entrefer principal diminue jusqu'à une valeur d'environ 70 mm.N. En effet, la flèche F illustrant l'effort tourne dans le sens anti-horaire jusqu'à une position illustrée sur la figure 2. Dans cette position, la direction de l'effort F passe sensiblement par l'axe de rotation X et le couple est donc d'une valeur très peu élevée.
La présence de l'entrefer e à l'intérieur de la bobine 6 et en particulier au milieu de sa longueur, contribue également à augmenter l'effort, car cela permet de canaliser le flux magnétique en limitant les flux de fuites magnétiques générés pour des courants élevés.FIG. 3 illustrates three curves u, v, w representing the evolution as a function of the value of the gap, respectively, of the torque generated by the main air gap situated between the
As the
The presence of the air gap e inside the
On voit donc que selon l'invention, l'effort passe d'une valeur maximale à une valeur minimale (fig.3), contrairement au cas de l'actionneur de l'art antérieur (fig.4) pour lequel c'est le contraire qui se produit, et ceci malgré une augmentation de l'inertie de la palette. Avantageusement, cet effet de décroissance peut être augmenté de manière à obtenir un frein électromagnétique de la palette, évitant à ladite palette d'impacter trop violemment sa butée en fin de course. Pour ce faire, il suffirait de disposer l'entrefer principal et les parties biseautées de telle manière que la palette puisse continuer quelque peu son déplacement en rotation dans le sens anti-horaire au delà de la position représentée sur la figure 5, dans laquelle la direction de la force F passe par l'axe d'articulation X, pour atteindre une position de fermeture de la palette. Ainsi, pendant ce déplacement supplémentaire, la direction de la force exercée au niveau de l'entrefer principal passerait en dessous de l'axe d'articulation X, entraînant de ce fait un couple inverse ayant pour effet de freiner la palette.
On notera que le circuit magnétique pourra être feuilleté.
On a donc réalisé grâce à l'invention un actionneur dans lequel la valeur de l'effort est très élevée, et maximale, en début de fermeture, d'où il résulte une réaction immédiate de l'actionneur en cas de défaut électrique, d'où une réactivité améliorée du disjoncteur.
Bien entendu, l'invention n'est pas limitée aux modes de réalisation décrits et illustrés qui n'ont été donnés qu'à titre d'exemple.
C'est ainsi que d'autres formes pour les parties biseautées pourraient être envisagées sans sortir du cadre de l'invention, pourvu qu'elles permettent d'obtenir les résultats décrits, à savoir le fait de réduire l'entrefer entre la palette et la culasse, par rapport à la course en rotation de la palette, et d'augmenter la vitesse de la palette (mise en mouvement de la palette) au départ.
L'actionneur pourrait être utilisé avantageusement dans d'autres appareils que des disjoncteurs, nécessitant qu'un effort important soit produit en début de fermeture.It can therefore be seen that according to the invention, the force goes from a maximum value to a minimum value (FIG. 3), unlike in the case of the actuator of the prior art (FIG. the opposite occurs, and this despite an increase in the inertia of the palette. Advantageously, this decay effect can be increased so as to obtain an electromagnetic brake of the pallet, preventing said pallet from impacting its end stop too violently. To do this, it would be sufficient to have the main air gap and the bevelled parts in such a way that the pallet can continue somewhat its rotational movement in the anti-clockwise direction beyond the position represented on the 5, in which the direction of the force F passes through the hinge axis X to reach a closed position of the pallet. Thus, during this additional displacement, the direction of the force exerted at the main air gap would pass below the hinge axis X, thereby causing a reverse torque having the effect of braking the pallet.
Note that the magnetic circuit can be laminated.
An actuator in which the value of the force is very high, and maximum, at the beginning of closing, resulting from an immediate reaction of the actuator in the event of an electrical fault, is therefore achieved thanks to the invention. where improved circuit breaker reactivity.
Of course, the invention is not limited to the embodiments described and illustrated which have been given by way of example.
Thus, other shapes for the beveled parts could be envisaged without departing from the scope of the invention, provided that they make it possible to obtain the results described, namely to reduce the gap between the pallet and the cylinder head, relative to the rotational stroke of the pallet, and increase the speed of the pallet (setting the pallet movement) at the start.
The actuator could be used advantageously in other devices than circuit breakers, requiring a major effort is produced at the beginning of closing.
Au contraire l'invention comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci sont effectuées suivant les revendications annexées.On the contrary, the invention comprises all the technical equivalents of the means described and their combinations if they are carried out according to the appended claims.
Claims (8)
- Magnetic actuator (A), in particular to open the contacts of a switchgear apparatus such as a circuit breaker and/or to trip said circuit breaker in the event of an electrical fault, this actuator comprising a magnetic circuit formed by a ferromagnetic yoke (1), said yoke comprising a first branch (2) and a second branch (3) appreciably parallel to one another connected by a transverse base part (4), a movable blade (5) mounted articulated via one of its ends (5a) on the free end (2a) of the first branch and operating via its other end (5b) in conjunction with the free end (3a) of the second branch, a means for producing a magnetic field (6) able to move the blade in rotation between an open rest position of the blade corresponding to normal operation of the apparatus and an active position corresponding to the occurrence of an electrical fault in the apparatus, wherein the free end (5b) of the blade is kept in the position of minimum reluctance with respect to the free end of the second branch, the above-mentioned blade (5) being L-shaped and comprising a first arm (7) articulated on the first branch (2) of the yoke (1) and a second arm (8) appreciably perpendicular to the first arm (7), and operating in conjunction with the second branch (3) of the yoke (1), the second branch (3) and the second arm (8) each comprising a bevelled part (a, b) at their free end (8a, 3a), the two bevelled parts (a, b) being of complementary shape and able to be moved to a position in which said bevelled parts (a, b) are facing one another and appreciably parallel to one another, in the closed position of the blade (5), characterized in that the second branch (3) comprises in addition a non-bevelled end face (d) at its free end, that the length of the first arm (7) is smaller than the length of the above-mentioned base part (4) and that the air-gap (e) between the bevelled parts (a, b) and the bevelled parts themselves are arranged with respect to the axis of rotation (X) of the blade (5) in such a way that the torque associated to the attraction force (F) of the blade (5) on the yoke (1) is maximum in the open position of the blade (5) and decreases when the blade (5) moves from the open position to the closed position.
- Actuator according to claim 1, characterized in that the air-gap (e) between the bevelled parts (a, b) and the bevelled parts (a ,b) themselves are arranged with respect to the axis of rotation (X) of the blade (5) in such a way that, in the proximity of the closed position of the blade (5), the direction of the attraction force (F) passes via said axis of rotation (X), this position of the blade (5) corresponding to a zero torque.
- Actuator according to claim 1 or 2, characterized in that the above-mentioned blade (5) can still be moved slightly in rotation in the closing direction beyond the above-mentioned position corresponding to a zero torque, the torque exerted during this additional movement then being reversed, thereby performing slowing-down of the blade (5).
- Actuator according to any one of the foregoing claims, characterized in that the means for producing the magnetic field comprising a coil (6), the air-gap called the main air-gap (e), between the end (3a) of the second branch (3) and the free end (5b) of the blade (5), is situated inside the coil (6).
- Actuator according to claim 4, characterized in that the air-gap called the main air-gap (e) is situated at mid-length of the coil (6).
- Actuator according to any one of the foregoing claims, characterized in that the two free ends (5b, 3a) respectively of the blade (5) and of the second branch (3) each comprise a bevelled face (a, b) and a non-bevelled face (c, d).
- Actuator according to any one of the foregoing claims, characterized in that the magnetic circuit is lamellar.
- Circuit breaker comprising an actuator according to any one of the foregoing claims.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9902839 | 1999-03-02 | ||
| FR9902839A FR2790593B1 (en) | 1999-03-02 | 1999-03-02 | MAGNETIC ACTUATOR WITH A PALLET IN PARTICULAR FOR A CIRCUIT BREAKER AND CIRCUIT BREAKER PROVIDED WITH SUCH AN ACTUATOR |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1033736A1 EP1033736A1 (en) | 2000-09-06 |
| EP1033736B1 true EP1033736B1 (en) | 2006-07-05 |
Family
ID=9542938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00410016A Expired - Lifetime EP1033736B1 (en) | 1999-03-02 | 2000-02-16 | Magnetic actuator with pivoting armature, in particular for a circuit breaker, and circuit breaker with such an actuator |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1033736B1 (en) |
| CN (1) | CN1181506C (en) |
| AT (1) | ATE332569T1 (en) |
| DE (1) | DE60029152T2 (en) |
| DK (1) | DK1033736T3 (en) |
| ES (1) | ES2265899T3 (en) |
| FR (1) | FR2790593B1 (en) |
| NO (1) | NO20000754L (en) |
| PL (1) | PL194996B1 (en) |
| PT (1) | PT1033736E (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020171519A1 (en) * | 2001-05-17 | 2002-11-21 | Siemens Energy & Automation, Inc. | Clapper-type electromagnet assembly having v-shaped air gap for use in a circuit breaker trip unit |
| FR2972844B1 (en) * | 2011-03-15 | 2014-06-06 | Schneider Electric Ind Sas | ROTARY ACTUATOR AND CONTACTOR COMPRISING SUCH ACTUATOR |
| CN102522271B (en) * | 2011-12-31 | 2014-06-18 | 常熟开关制造有限公司(原常熟开关厂） | Trip electromagnet for circuit breaker |
| ES2576331T3 (en) | 2012-06-11 | 2016-07-07 | Labinal, Llc | Electric switching apparatus and relay that includes a ferromagnetic or magnetic armor that has a tapered part |
| CN105190797A (en) * | 2012-12-21 | 2015-12-23 | 费斯托股份有限两合公司 | Electromechanical drive arrangement and solenoid valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE296234C (en) * | 1914-11-30 | 1917-01-23 | ||
| GB103641A (en) * | 1916-01-10 | 1917-07-05 | Bbc Brown Boveri & Cie | An Improved Resilient Pivotal Connection between an Alternating Current Electro Magnet and its Armature. |
| FR613481A (en) * | 1925-07-20 | 1926-11-18 | Jules Richard Sa Des Ets | Improvement in electromagnets |
| DE572086C (en) * | 1931-06-16 | 1933-03-10 | Aeg | Magnet with sliding armature, especially for overcurrent release of electrical switches |
| CH209749A (en) * | 1938-08-29 | 1940-04-30 | Sodeco Compteurs De Geneve | Electromagnet, particularly applicable to telephone installations. |
| DE1098589B (en) * | 1954-03-18 | 1961-02-02 | Siemens Ag | Quick release, especially for installation in motor protection switches |
-
1999
- 1999-03-02 FR FR9902839A patent/FR2790593B1/en not_active Expired - Fee Related
-
2000
- 2000-02-15 NO NO20000754A patent/NO20000754L/en not_active Application Discontinuation
- 2000-02-16 ES ES00410016T patent/ES2265899T3/en not_active Expired - Lifetime
- 2000-02-16 DE DE60029152T patent/DE60029152T2/en not_active Expired - Lifetime
- 2000-02-16 EP EP00410016A patent/EP1033736B1/en not_active Expired - Lifetime
- 2000-02-16 AT AT00410016T patent/ATE332569T1/en not_active IP Right Cessation
- 2000-02-16 DK DK00410016T patent/DK1033736T3/en active
- 2000-02-16 PT PT00410016T patent/PT1033736E/en unknown
- 2000-02-28 PL PL338665A patent/PL194996B1/en unknown
- 2000-02-29 CN CNB001036521A patent/CN1181506C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FR2790593A1 (en) | 2000-09-08 |
| DE60029152D1 (en) | 2006-08-17 |
| NO20000754L (en) | 2000-09-04 |
| PT1033736E (en) | 2006-10-31 |
| PL194996B1 (en) | 2007-07-31 |
| CN1181506C (en) | 2004-12-22 |
| EP1033736A1 (en) | 2000-09-06 |
| DE60029152T2 (en) | 2007-05-31 |
| PL338665A1 (en) | 2000-09-11 |
| CN1265513A (en) | 2000-09-06 |
| FR2790593B1 (en) | 2001-05-04 |
| DK1033736T3 (en) | 2006-11-06 |
| ATE332569T1 (en) | 2006-07-15 |
| NO20000754D0 (en) | 2000-02-15 |
| ES2265899T3 (en) | 2007-03-01 |
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