EP2820664B1 - Electromagnetic actuator having a high unlocking force - Google Patents
Electromagnetic actuator having a high unlocking force Download PDFInfo
- Publication number
- EP2820664B1 EP2820664B1 EP13712868.2A EP13712868A EP2820664B1 EP 2820664 B1 EP2820664 B1 EP 2820664B1 EP 13712868 A EP13712868 A EP 13712868A EP 2820664 B1 EP2820664 B1 EP 2820664B1
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- European Patent Office
- Prior art keywords
- magnet
- armature
- plate
- distance
- leg
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- 230000006698 induction Effects 0.000 claims description 5
- 230000004907 flux Effects 0.000 description 13
- 241001644893 Entandrophragma utile Species 0.000 description 2
- 241000287107 Passer Species 0.000 description 2
- 229910000828 alnico Inorganic materials 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 230000003042 antagnostic effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
- H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by unbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by unbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
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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
- H01H50/18—Movable parts of magnetic circuits, e.g. armature
- H01H50/24—Parts rotatable or rockable outside coil
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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
- H01H71/32—Electromagnetic mechanisms having permanently magnetised part
- H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements
Definitions
- the present invention relates to an electromagnetic actuator of the differential relay type, capable of providing a sufficient unlocking force to trigger, for example, a differential switch lock. It relates more specifically to a high sensitivity actuator device, used in particular in the field of differential protection, when it is considered independently of the mains voltage.
- the torque transmitted to the pallet by the permanent magnet opposes the torque exerted by the spring on the pallet.
- the magnet further allows finer control of the fluxes in the magnetic circuit and renders the sensibility of the actuator higher.
- the flux created on this occasion in the magnetic circuit by the coil combines with the flux generated by the magnet, destroying the initial mechanical equilibrium. and rotating the pallet, attracted in contact with the pole end surfaces of the frame.
- the displacement of the pallet causes that of a mechanical member, for example a rod adapted to unlock the lock of a differential switch placed close to the electromagnetic actuator, such that said rod can act on a trigger.
- the objective of the present invention therefore consists in overcoming the drawbacks of the solutions of the prior art, by proposing an electromagnetic actuator capable of providing a large unlocking force, which is simple to implement and whose design remains compact. .
- the aim is also not to increase the volume of the magnet, or those of the pallet and the frame, which is already undesirable from a clutter point of view, and obviously has implications on the operation and behavior of the magnetic circuit.
- the invention is characterized primarily in that the magnet is positioned in the vicinity of the jamb of the armature opposite the proximal leg of the pivot point of the pallet .
- the force generated by the magnet can remain identical to what was known, the attraction torque of the pallet towards the polar surfaces of the armature that it generates being substantially greater, because of the increase of the arm of lever between the magnet and the pivot point of the pallet.
- the positioning of the magnet with respect to the reinforcement results from a fine compromise which aims to maximize the attraction torque of the pallet towards the polar surfaces of the armature while avoiding a the saturation of the jamb of the armature opposite the point of pivoting, and secondly the demagnetization of the permanent magnet.
- the distance A between the magnet and the leg of the armature opposite the proximal leg of the pivot point of the pallet is provided less than half the distance D between the two legs of the armature.
- the distance A may be greater than the distance B between the magnet and the pallet in the closed position added to the distance C between the magnet and the base of the armature.
- the distance A is chosen greater than 0.3mm.
- the polar surface of the magnet opposite the pallet is provided greater than 6 mm 2 .
- the opening angle of the pallet is limited, in practice between 0 ° and 15 °.
- the magnetic circuit of a conventional actuator comprises a U-shaped fixed armature (1), a pallet (2) pivotally mounted along an axis (3) in the vicinity of the upper end of a leg (4).
- the armature (1) and which is in this case represented closed, that is to say that its free end is in contact with the upper end of the other leg (5).
- a permanent magnet (6) is placed in the immediate vicinity of the jamb (5), the distance A separating them having been artificially increased to improve the clarity of the figure, but being less important than the representation that is made in reality.
- D is the distance separating said legs (4, 5)
- A is the distance separating the permanent magnet (6) from the jamb (5)
- B and C are the distances separating the permanent magnet (6). ) respectively of the pallet (2) and the base (7) of the magnetic armature (1).
- FIG 2 illustrates in greater detail an example of an electromagnetic actuator configuration according to the invention with, in a housing (10), the armature (1) and the pallet (2) connected to a pallet plate (11) which is rotatably mounted in the housing (3).
- This sheet (11) further comprises a tab (12) on which is fixed an end of a coil spring (13) whose other end is secured to a reinforcing sheet (14) extending along the jamb (4).
- the pallet cooperates with a pusher (15) whose free end protrudes from the casing (10), and which is displaced by it between two positions corresponding to the two positions that can take the pallet (2), respectively in contact and at a distance from the armature (1), according to whether the coil (16) is traversed by a current or not.
- This coil (16) is mounted on a support (17) surrounding the base (7) of the frame (1), and for this purpose passing through a window (18) formed in the housing (10).
- the permanent magnet (6) is arranged in the immediate vicinity of the jamb (5), and its positioning obeys the length and distance conditions previously imposed.
- the pallet (2) is moved relative to the frame (1), it pivots in fact from its position in contact with the end of the leg (5) urged by the spring (13), causing the pusher (15) whose end cooperates with a trigger system, for example a circuit breaker (not shown).
- a trigger system for example a circuit breaker (not shown).
Description
La présente invention a trait à un actionneur électromagnétique du type relais différentiel, capable de fournir une force de déverrouillage suffisante pour faire déclencher par exemple une serrure d'interrupteur différentiel. Elle concerne plus précisément un dispositif actionneur à haute sensibilité, utilisé notamment dans le domaine de la protection différentielle, lorsque celle-ci est envisagée indépendamment de la tension secteur.The present invention relates to an electromagnetic actuator of the differential relay type, capable of providing a sufficient unlocking force to trigger, for example, a differential switch lock. It relates more specifically to a high sensitivity actuator device, used in particular in the field of differential protection, when it is considered independently of the mains voltage.
Ce type d'actionneur électromagnétique comprend classiquement :
- une armature fixe, en général en forme de U, dont les extrémités des deux jambages constituent deux surfaces polaires coplanaires ;
- une palette pivotante entre deux positions respectivement à distance, c'est à dire laissant subsister un entrefer avec l'armature et, en position armée du déclencheur, au contact desdites surfaces polaires, fermant ainsi le circuit magnétique constitué par ladite armature et ladite palette, le point de rotation de la palette se situant au voisinage immédiat de l'extrémité de l'un des jambages de l'armature ;
- un aimant permanent de polarisation du circuit magnétique, disposé entre les jambages de l'armature et créant une force magnétique permanente d'attraction de la palette vers les surfaces polaires, force magnétique qui s'exerce à l'encontre d'une force de rappel d'un ressort ;
- une bobine d'induction entourant le circuit magnétique, reliée par exemple à un circuit à contrôler, en vue de modifier l'équilibre initial entre la force magnétique et la force de rappel du ressort.
- a fixed frame, generally U-shaped, the ends of the two legs constitute two coplanar polar surfaces;
- a pivoting pallet between two positions respectively at a distance, ie leaving a gap with the armature and, in the armed position of the release, in contact with said polar surfaces, thus closing the magnetic circuit constituted by said armature and said pallet, the point of rotation of the pallet being in the immediate vicinity of the end of one of the legs of the frame;
- a permanent magnetic polarization magnet of the magnetic circuit, arranged between the legs of the armature and creating a permanent magnetic force of attraction of the pallet towards the polar surfaces, magnetic force which is exerted against a restoring force a spring;
- an induction coil surrounding the magnetic circuit, connected for example to a circuit to be controlled, in order to modify the initial equilibrium between the magnetic force and the restoring force of the spring.
Concrètement, le couple transmis à la palette par l'aimant permanent s'oppose au couple exercé par le ressort sur la palette. L'aimant permet de plus de contrôler de manière plus fine les flux passant dans le circuit magnétique et de rendre la sensibilité de l'actionneur plus élevée.Concretely, the torque transmitted to the pallet by the permanent magnet opposes the torque exerted by the spring on the pallet. The magnet further allows finer control of the fluxes in the magnetic circuit and renders the sensibility of the actuator higher.
Lorsqu'un courant traverse la bobine, signalant par exemple un incident d'ordre différentiel sur des lignes, le flux créé à cette occasion dans le circuit magnétique par la bobine se combine au flux généré par l'aimant, détruisant l'équilibre mécanique initial et faisant pivoter la palette, attirée au contact des surfaces polaires d'extrémité de l'armature. Le déplacement de la palette entraine celui d'un organe mécanique, par exemple une tige apte à déverrouiller la serrure d'un interrupteur différentiel placé à proximité de l'actionneur électromagnétique, de telle sorte que ladite tige puisse agir sur un déclencheur.When a current flows through the coil, for example signaling a differential-order incident on lines, the flux created on this occasion in the magnetic circuit by the coil combines with the flux generated by the magnet, destroying the initial mechanical equilibrium. and rotating the pallet, attracted in contact with the pole end surfaces of the frame. The displacement of the pallet causes that of a mechanical member, for example a rod adapted to unlock the lock of a differential switch placed close to the electromagnetic actuator, such that said rod can act on a trigger.
Un tel déclencheur électromagnétique est décrit dans son principe dans le brevet
Pour surmonter ce problème, il est alors parfois nécessaire d'introduire des moyens supplémentaires entre le relais et la serrure, qui ont pour fonction de diminuer la force nécessaire au déverrouillage de la serrure.To overcome this problem, it is sometimes necessary to introduce additional means between the relay and the lock, whose function is to reduce the force required to unlock the lock.
Cette solution n'est cependant pas avantageuse, ni structurellement car elle nécessite l'ajout de composants et donc un plus grand volume dans le boitier du disjoncteur (en obérant de surcroît la fiabilité de l'ensemble), ni économiquement car elle ajoute des étapes supplémentaires lors de la fabrication de l'appareil.This solution is however not advantageous, nor structurally because it requires the addition of components and therefore a larger volume in the case of the circuit breaker (in addition overrating the reliability of the assembly), nor economically because it adds steps during the manufacture of the device.
L'objectif de la présente invention consiste donc à remédier aux inconvénients des solutions de l'art antérieur, en proposant un actionneur électromagnétique capable de fournir une grande force de déverrouillage, qui soit au surplus simple de mise en oeuvre et dont la conception reste compacte.The objective of the present invention therefore consists in overcoming the drawbacks of the solutions of the prior art, by proposing an electromagnetic actuator capable of providing a large unlocking force, which is simple to implement and whose design remains compact. .
L'objectif visé est au surplus de ne pas augmenter le volume de l'aimant, ou ceux de la palette et de l'armature, ce qui n'est déjà pas souhaitable d'un point de vue encombrement, et a évidemment des incidences sur le fonctionnement et le comportement du circuit magnétique.The aim is also not to increase the volume of the magnet, or those of the pallet and the frame, which is already undesirable from a clutter point of view, and obviously has implications on the operation and behavior of the magnetic circuit.
Par ailleurs, l'obtention d'une force de déverrouillage supérieure doit être possible sans augmenter la puissance de déclenchement.In addition, obtaining a higher unlocking force must be possible without increasing the triggering power.
Pour remplir ces objectifs, et d'autres qui apparaîtront dans la suite, l'invention se caractérise à titre principal en ce que l'aimant est positionné au voisinage du jambage de l'armature opposée au jambage proximal du point de pivotement de la palette.To fulfill these objectives, and others that will appear in the following, the invention is characterized primarily in that the magnet is positioned in the vicinity of the jamb of the armature opposite the proximal leg of the pivot point of the pallet .
La force générée par l'aimant peut rester identique à ce qui était connu, le couple d'attraction de la palette vers les surfaces polaires de l'armature qu'il génère étant sensiblement plus important, du fait de l'augmentation du bras de levier entre l'aimant et le point de pivotement de la palette.The force generated by the magnet can remain identical to what was known, the attraction torque of the pallet towards the polar surfaces of the armature that it generates being substantially greater, because of the increase of the arm of lever between the magnet and the pivot point of the pallet.
Il est alors possible de dimensionner des moyens ressort générant, lorsque l'équilibre est rompu par l'apparition d'un courant dans la bobine, une force bien supérieure s'appliquant à l'organe mécanique prévu pour actionner un dispositif extérieur.It is then possible to size spring means generating, when the equilibrium is broken by the appearance of a current in the coil, a much greater force applying to the mechanical member provided for actuating an external device.
Un tel positionnement de l'aimant n'est pas une solution qui s'impose aux spécialistes de ce domaine technique, et doit par conséquent être vu comme tout à fait original dans un tel actionneur électromagnétique pour plusieurs raisons, dont les plus importantes sont :
- un réglage du déclencheur électromagnétique est toujours nécessaire, et il se fait surtout par ajustement de l'induction de l'aimant. Or, plus l'aimant est proche du point de pivot, plus le réglage est facile car seule une petite partie du flux de l'aimant est utilisée dans la partie utile du circuit électromagnétique, celle qui comprend l'entrefer le plus important à l'opposé du point de pivotement de la palette.
Le reste est en quelque sorte court-circuité par passage dans le jambage voisin du point de pivotement. Ainsi, si 70 % du flux est dans ce cas, et que seulement 30 % du flux est utile, une variation de 0,01 T de l'aimant se répercute à hauteur de 0,3 x 0,01 T, c'est à dire 0,003 T. Le réglage est alors facile à obtenir, bien plus que dans l'hypothèse inverse, lorsque l'aimant est positionné loin du point de pivotement. - la désaimantation : les aimants utilisés dans ce type d'actionneur, par exemple ceux qui sont connus sous la dénomination AlniCo, sont des aimants considérés comme faciles à régler et qui présentent une dérive des caractéristiques magnétiques compatible avec celle des matériaux magnétiques de l'armature et de la palette. Ils se désaimantent cependant relativement facilement, par exemple lorsque le circuit magnétique change.
Or, c'est précisément ce qui se passe dans un tel actionneur, car l'aimant ne voit pas le même circuit magnétique selon que la palette est ouverte ou fermée. Cela est cependant beaucoup moins vrai et/ou beaucoup moins important plus l'aimant est plus proche du point de pivotement, car la partie court-circuitée du circuit magnétique ne change guère, et la plus grande partie de flux y passe : dans ces conditions, le circuit magnétique global ne change pas beaucoup lorsqu'il est vu de l'aimant. Cela n'est en revanche plus vrai lorsque l'aimant est placé près du jambage opposé au point de pivotement. - Si l'on rapproche trop l'aimant de ce jambage, son flux va passer directement, latéralement, dans ledit jambage sans passer par la palette, et on risque la saturation dudit jambage de l'armature.
- a setting of the electromagnetic trigger is always necessary, and it is done mainly by adjusting the induction of the magnet. However, the closer the magnet is to the pivot point, the easier the adjustment is because only a small part of the flux of the magnet is used in the useful part of the electromagnetic circuit, that which includes the largest air gap in the electromagnetic circuit. opposite the pivot point of the pallet.
The rest is somehow bypassed by passing into the leg near the pivot point. Thus, if 70% of the flux is in this case, and that only 30% of the flux is useful, a variation of 0.01 T of the magnet echoes at the level of 0.3 x 0.01 T, it is ie 0.003 T. The adjustment is then easy to obtain, much more than in the opposite case, when the magnet is positioned far from the point of pivoting. - demagnetization: the magnets used in this type of actuator, for example those known under the name AlniCo, are magnets considered easy to adjust and which have a drift of the magnetic characteristics compatible with that of the magnetic materials of the frame and the palette. They demagnetize however relatively easily, for example when the magnetic circuit changes.
However, this is precisely what happens in such an actuator, because the magnet does not see the same magnetic circuit according to whether the pallet is open or closed. This is however much less true and / or much less important the magnet is closer to the pivot point, because the short-circuited part of the magnetic circuit does not It changes little, and most of the flux passes: under these conditions, the overall magnetic circuit does not change much when seen from the magnet. This is no longer true when the magnet is placed near the leg opposite the pivot point. - If the magnet is brought too close to this leg, its flow will pass directly, laterally, in said leg without passing through the pallet, and there is a risk of saturation of said jamb of the armature.
Dans ces trois perspectives, le réflexe de l'homme de l'art est donc plutôt d'éloigner l'aimant du jambage opposé au point de pivotement, cette position créant trop d'inconvénients/problèmes potentiels.In these three perspectives, the reflex of those skilled in the art is rather to move the magnet away from the leg opposite the pivot point, this position creating too many disadvantages / potential problems.
La présente solution va par conséquent à l'encontre des contraintes qui s'imposent et qui dictent en principe à l'homme de l'art la conduite à tenir en termes de conception d'un tel ensemble, selon les connaissances usuelles de ce domaine technique.The present solution therefore goes against the constraints that are imposed and which in principle dictate to those skilled in the art the conduct to be held in terms of design of such a set, according to the usual knowledge of this field technical.
Le positionnement de l'aimant par rapport à l'armature, selon l'invention, résulte d'un compromis fin qui vise à maximiser le couple d'attraction de la palette vers les surfaces polaires de l'armature tout en évitant d'une part la saturation du jambage de l'armature opposé au point de pivotement, et d'autre part la désaimantation de l'aimant permanent.The positioning of the magnet with respect to the reinforcement, according to the invention, results from a fine compromise which aims to maximize the attraction torque of the pallet towards the polar surfaces of the armature while avoiding a the saturation of the jamb of the armature opposite the point of pivoting, and secondly the demagnetization of the permanent magnet.
Pour ce faire, la distance A entre l'aimant et le jambage de l'armature opposé au jambage proximal du point de pivotement de la palette est prévue inférieure à la moitié de la distance D séparant les deux jambages de l'armature.To do this, the distance A between the magnet and the leg of the armature opposite the proximal leg of the pivot point of the pallet is provided less than half the distance D between the two legs of the armature.
Par ailleurs, de préférence, la distance A peut être prévue supérieure à la distance B entre l'aimant et la palette en position fermée additionnée à la distance C entre l'aimant et la base de l'armature.Furthermore, preferably, the distance A may be greater than the distance B between the magnet and the pallet in the closed position added to the distance C between the magnet and the base of the armature.
De préférence encore, la distance A est choisie supérieure à 0,3mm.More preferably, the distance A is chosen greater than 0.3mm.
Selon d'autres caractéristiques du circuit magnétique propre à l'invention et qui permettent un fonctionnement optimal du déclencheur, il est à noter que la surface polaire de l'aimant en regard de la palette est prévue supérieure à 6 mm2.According to other characteristics of the magnetic circuit of the invention and which allow optimal operation of the trigger, it should be noted that the polar surface of the magnet opposite the pallet is provided greater than 6 mm 2 .
Par ailleurs, la palette recouvre:
- au moins 75 % de la surface polaire de l'aimant qui lui fait face, et
- entre 30 % et 80 % de la surface polaire du jambage proximal de l'aimant qui lui fait face.
- at least 75% of the polar surface of the magnet facing it, and
- between 30% and 80% of the polar surface of the proximal leg of the magnet facing it.
Toujours pour réunir les conditions d'un compromis le meilleur possible, il est prévu, selon l'invention, que l'angle d'ouverture de la palette soit limité, en pratique compris entre 0° et 15°.Always to meet the conditions of a compromise the best possible, it is provided according to the invention, the opening angle of the pallet is limited, in practice between 0 ° and 15 °.
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode particulier de réalisation de l'invention, donné à titre d'exemple non limitatif, et représenté aux dessins annexés sur lesquels :
- la
figure 1 illustre très schématiquement une configuration possible pour un circuit magnétique selon l'invention, et - la
figure 2 représente un actionneur dont le circuit magnétique obéit aux critères de l'invention.
- the
figure 1 illustrates very schematically a possible configuration for a magnetic circuit according to the invention, and - the
figure 2 represents an actuator whose magnetic circuit obeys the criteria of the invention.
En référence à la
Dans cette configuration, D est la distance séparant lesdits jambages (4, 5), A est donc la distance séparant l'aimant permanent (6) du jambage (5), et B et C sont les distances séparant l'aimant permanent (6) respectivement de la palette (2) et de la base (7) de l'armature magnétique (1).In this configuration, D is the distance separating said legs (4, 5), A is the distance separating the permanent magnet (6) from the jamb (5), and B and C are the distances separating the permanent magnet (6). ) respectively of the pallet (2) and the base (7) of the magnetic armature (1).
Ce sont sur ces distances que portent les conditions qui ont été mentionnées auparavant, plus précisément :
- A < D/2
- A > B + C
- A > 0,3 mm
- A <D / 2
- A> B + C
- A> 0.3 mm
Les surfaces polaires (20) et (21) respectivement de l'aimant (6) et du jambage (5) qui font face à la palette (2) obéissent aux conditions surfaciques mentionnées précédemment, notamment pour ce qui concerne le taux de recouvrement de ces surfaces (20, 21) par la palette (2). De nombreux tests ont en effet montré que ces conditions, lorsqu'elles sont satisfaites, permettent un fonctionnement optimal du déclencheur.The polar surfaces (20) and (21) respectively of the magnet (6) and the leg (5) which face the pallet (2) obey the aforementioned surface conditions, in particular with regard to the recovery rate of these surfaces (20, 21) by the pallet (2). Numerous tests have shown that these conditions, when they are satisfied, allow the trigger to function optimally.
La
La palette coopère avec un poussoir (15) dont l'extrémité libre dépasse du boîtier (10), et qui est déplacé par elle entre deux positions correspondant aux deux positions que peut prendre la palette (2), respectivement au contact et à distance de l'armature (1), selon que la bobine (16) est parcourue par un courant ou non. Cette bobine (16) est montée sur un support (17) entourant la base (7) de l'armature (1), et passant à cet effet par une fenêtre (18) pratiquée dans le boîtier (10).The pallet cooperates with a pusher (15) whose free end protrudes from the casing (10), and which is displaced by it between two positions corresponding to the two positions that can take the pallet (2), respectively in contact and at a distance from the armature (1), according to whether the coil (16) is traversed by a current or not. This coil (16) is mounted on a support (17) surrounding the base (7) of the frame (1), and for this purpose passing through a window (18) formed in the housing (10).
L'aimant permanent (6) est disposée à proximité immédiate du jambage (5), et son positionnement obéit aux conditions de longueur et de distance posées auparavant.The permanent magnet (6) is arranged in the immediate vicinity of the jamb (5), and its positioning obeys the length and distance conditions previously imposed.
Classiquement, en cas d'apparition d'un courant dans la bobine (16) par exemple provoqué par un défaut différentiel dans un circuit, le flux créé par la bobine (16) déséquilibre l'ensemble préalablement en équilibre mécanique, tant que le couple généré par le ressort (13) est égal à celui généré par l'aimant permanent (6).Conventionally, in case of occurrence of a current in the coil (16) for example caused by a differential defect in a circuit, the flux created by the coil (16) unbalances the assembly previously in mechanical equilibrium, as long as the torque generated by the spring (13) is equal to that generated by the permanent magnet (6).
La palette (2) est se déplace par rapport à l'armature (1), elle pivote en fait depuis sa position au contact de l'extrémité du jambage (5) rappelée par le ressort (13), entrainant le poussoir (15) dont l'extrémité coopère avec un système déclencheur, par exemple de disjoncteur (non représenté).The pallet (2) is moved relative to the frame (1), it pivots in fact from its position in contact with the end of the leg (5) urged by the spring (13), causing the pusher (15) whose end cooperates with a trigger system, for example a circuit breaker (not shown).
Claims (6)
- Electromagnetic trigger, of the differential relay type, comprising:- a U-shaped armature (1), the ends of the two legs (4, 5) of which form two coplanar polar surfaces;- a plate (2) pivoting between two positions, respectively at a distance, i.e. leaving an air gap with the armature (1) and in the armed position of the trigger, in contact with said polar surfaces, thus closing the magnetic circuit formed by said armature (1) and said plate (2), the rotation point (3) of the plate (2) being located in the immediate vicinity of the end of one of the legs (4) of the armature (1);- a permanent magnet (6) for biasing the magnetic circuit, positioned between the legs (4, 5) of the armature (1) and generating a permanent magnetic force attracting the plate (2) to the polar surfaces, a magnetic force which acts against a return force exerted by a spring (13);- an induction coil (16) surrounding the magnetic circuit, for example connected to a circuit to be controlled, with a view to modifying the initial equilibrium between the magnetic force and the return force exerted by the spring (13); characterised in that the magnet (6) is positioned in the vicinity of the leg (5) of the armature (1) opposite to the proximal leg (4) of the pivoting point (3) of the plate (2),in that the plate (2) covers at least 75% of the polar surface of the magnet (6) which is opposite it and
in that the plate (2) covers between 30% and 80% of the polar surface of the proximal leg (5) of the magnet (6) which is opposite to it. - Electromagnetic trigger according to claim 1, characterised in that the distance A between the magnet (6) and the leg (5) of the armature (1) opposite to the proximal leg (4) of the pivot point (3) of the plate (2) is less than half of the distance D separating both legs (4, 5) of the armature (1).
- Electromagnetic trigger according to any one of the preceding claims, characterised in that the distance A is greater than the distance B between the magnet (6) and the plate (2) in the closed position in addition to the distance C between the magnet (6) and the base (7) of the armature (1).
- Electromagnetic trigger according to any one of the preceding claims, characterised in that the distance A is greater than 0.3 mm.
- Electromagnetic trigger according to any one of the preceding claims, characterised in that the polar surface of the magnet (6) facing the plate (2) is greater than 6 mm2.
- Electromagnetic trigger according to any one of the preceding claims, characterised in that the aperture angle of the plate (2) is between 0° and 15°.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13712868T PL2820664T3 (en) | 2012-02-29 | 2013-02-28 | Electromagnetic actuator having a high unlocking force |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1251866A FR2987493B1 (en) | 2012-02-29 | 2012-02-29 | ELECTROMAGNETIC ACTUATOR WITH HIGH UNLOCKING FORCE |
PCT/FR2013/050413 WO2013128125A1 (en) | 2012-02-29 | 2013-02-28 | Electromagnetic actuator having a high unlocking force |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2820664A1 EP2820664A1 (en) | 2015-01-07 |
EP2820664B1 true EP2820664B1 (en) | 2017-01-18 |
Family
ID=46754521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13712868.2A Active EP2820664B1 (en) | 2012-02-29 | 2013-02-28 | Electromagnetic actuator having a high unlocking force |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP2820664B1 (en) |
CN (1) | CN104246957B (en) |
AU (1) | AU2013224790B2 (en) |
ES (1) | ES2621667T3 (en) |
FR (1) | FR2987493B1 (en) |
IN (1) | IN2014MN01908A (en) |
PL (1) | PL2820664T3 (en) |
PT (1) | PT2820664T (en) |
WO (1) | WO2013128125A1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2630256B1 (en) * | 1988-04-14 | 1995-06-23 | Merlin Gerin | HIGH SENSITIVITY ELECTROMAGNETIC TRIGGER |
AT414183B (en) * | 1994-06-08 | 2006-10-15 | Tyco Electronics Austria Gmbh | BISTABLE SWITCHING DEVICE |
NL1004438C2 (en) * | 1996-11-05 | 1998-05-08 | Holec Holland Nv | Control device for an electric switch and a method of manufacturing it. |
KR100452659B1 (en) * | 2000-03-28 | 2004-10-14 | 마츠시다 덴코 가부시키가이샤 | Electromagnet driving apparatus and electromagnetic relay |
FR2846470B1 (en) * | 2002-10-28 | 2005-03-04 | Schneider Electric Ind Sas | ELECTRICAL SWITCHING DEVICE, RELAY AND ELECTRICAL DEVICE COMPRISING SUCH A DEVICE |
-
2012
- 2012-02-29 FR FR1251866A patent/FR2987493B1/en active Active
-
2013
- 2013-02-28 AU AU2013224790A patent/AU2013224790B2/en active Active
- 2013-02-28 IN IN1908MUN2014 patent/IN2014MN01908A/en unknown
- 2013-02-28 PT PT137128682T patent/PT2820664T/en unknown
- 2013-02-28 WO PCT/FR2013/050413 patent/WO2013128125A1/en active Application Filing
- 2013-02-28 CN CN201380020167.8A patent/CN104246957B/en active Active
- 2013-02-28 PL PL13712868T patent/PL2820664T3/en unknown
- 2013-02-28 EP EP13712868.2A patent/EP2820664B1/en active Active
- 2013-02-28 ES ES13712868.2T patent/ES2621667T3/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
AU2013224790A1 (en) | 2014-10-16 |
PL2820664T3 (en) | 2017-07-31 |
FR2987493B1 (en) | 2014-03-21 |
ES2621667T3 (en) | 2017-07-04 |
AU2013224790B2 (en) | 2016-07-07 |
CN104246957A (en) | 2014-12-24 |
IN2014MN01908A (en) | 2015-07-10 |
EP2820664A1 (en) | 2015-01-07 |
FR2987493A1 (en) | 2013-08-30 |
PT2820664T (en) | 2017-04-06 |
WO2013128125A1 (en) | 2013-09-06 |
CN104246957B (en) | 2018-01-02 |
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