EP0159207A1 - Quick over-current trip mechanism - Google Patents

Quick over-current trip mechanism Download PDF

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Publication number
EP0159207A1
EP0159207A1 EP85400257A EP85400257A EP0159207A1 EP 0159207 A1 EP0159207 A1 EP 0159207A1 EP 85400257 A EP85400257 A EP 85400257A EP 85400257 A EP85400257 A EP 85400257A EP 0159207 A1 EP0159207 A1 EP 0159207A1
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EP
European Patent Office
Prior art keywords
core
nose
cylinder head
cores
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85400257A
Other languages
German (de)
French (fr)
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EP0159207B1 (en
Inventor
Luc Moreau
Pierre Lemarquand
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.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique SA
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Publication of EP0159207A1 publication Critical patent/EP0159207A1/en
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Publication of EP0159207B1 publication Critical patent/EP0159207B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • 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
    • 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
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures

Definitions

  • the invention relates to quick release devices used in small short circuit protection devices. These devices include a coil associated with a magnetic circuit comprising a yoke, a fixed core and a movable core with low inertia for the mechanical control of the cut-off of the associated protective device, these cores being separated by an air gap placed in the region maximum flow.
  • the object of the present invention is in particular to optimize in a very simple manner the evolution of the force of attraction produced between the fixed core and the movable core as a function of their air gap. It also aims to facilitate the realization, in a space and with a reduced cost, of a quick release device for thin protective device.
  • this result is achieved in a device of the type described in the preamble in that the two cores are obtained by flat cutting and have complementary profiles of generally curvilinear shape, that of the two cores which is protruding comprising a nose and a body, the nose being connected to the body by sides whose slope with respect to the main axis of the projecting core gradually increases from the nose to the body.
  • the protruding nose core thus has a relatively tapered end along a main axis and inscribed inside a triangle whose base is of dimension equal to the width of the core body and whose height is substantially carried by the axis main nucleus.
  • the attraction force between the cores remains substantially constant over a wide range thanks to the progressive variation in the slope of their sides, the variation of this slope being for example between approximately 5 ° near the nose and 90 ° near the body of the projecting core.
  • the absence on each core of sides parallel to their main axis removes from the effort / gap curve any bump detrimental to the acceleration of the movable core.
  • the end of the nose of the projecting core may have a width - and / or the curvilinear sides of this core may have sections cut to length - at least equal to the thickness of the sheet from which the core is cut.
  • the fixed core may advantageously have at least one flat which is housed in a corresponding opening on one face of the cylinder head or of the protective device, while the movable core is mounted in an oblong guide window formed in a parallel face. of the breech.
  • the cut-out fixed core forms, for example, a flow closure bridge, the ends of which constitute the support flats.
  • the trigger device shown in the figures comprises a magnetic circuit with yoke 1, for example made of copper-plated electrolytic steel or of colaminated steel and copper, and a flat movable core 2, as well as a flat fixed core 3, of complementary profiles obtained by cutting and located in the same plane.
  • the movable core 2 acts as a rapid magnetic trip member capable of acting, as a function of the current flowing in a coil 4 supported by an insulating carcass in the form of a sheath 5, on a protective device not shown by means of a transmission mechanism also not shown.
  • the movable core is housed so as to be able to slide in a window 6 formed in a branch 7 of the cylinder head, the latter having on the other hand, as the case may be, an opposite parallel branch 8 and two lateral branches 9, 10 (FIGS. 1 and 2) or only two lateral branches 9, 10 ( Figures 3 and 4).
  • the fixed core 3 has a nose-shaped or nipple-shaped end 11a, a body 11b and a particular curvilinear profile for connecting the nose to the body whose role, in connection with a recess 12 with a profile complementary to the core mobile 3, will be explained later.
  • the protruding core here represented by the fixed core may as well be constituted by the movable core; the two cores could also be mobile.
  • the fixed core 2 is engaged and crimped by means of a flat 13 in a window 14 of the branch 8 of the cylinder head; it therefore offers a U shape closed by the branch 7 constituted by a nested bar and crimped on the branches 9, 10 ( Figure 1) or consists of two L, la, lb, nested and comprising one of the branches 7, 10 and the other the branches 8, 9 ( Figure 2).
  • the cylinder head consists of a single U-shaped piece comprising the three branches 7, 9, 10; the fixed core 2 has, at its rear part, a bridge 15 for closing the flow provided with two lateral flats 16, 17 allowing the core 2 to be fixed by welding on shoulders 18, 19 (FIG. 3) or by crimping and / or welding in slots 20, -21 (FIG. 4), the shoulders or the slots coming from cutting at the ends of the branches 9, 10 of the cut cylinder head 1.
  • notch 22 for passage for a coil connection wire 4 and in branch 9 of the cylinder head, a notch 23 for passage of the other coil connection wire.
  • the first connection wire is welded to the notch 22 and the corresponding branch of the cylinder head acts as a support for the fixed contact of the protective device, including the support not shown the movable contact cooperates directly with the outer face of the branch 9; the output of the coil through the notch 23 is obviously isolated.
  • Notches such as 24 are provided in the fixed core 2 to facilitate the positioning of the coil 4 and its carcass 5.
  • the coil carcass and the fixed core 2 are supported by an insulating part not shown possibly coming from molding with the protective device, and the cylinder head 1 takes a simplified shape in L one of the branches 25 of which comprises the window 6 for guiding the movable core 3 and the other branch 26 of which serves as a support for the fixed contact of the protective device.
  • One of the connection wires can be welded to the branch 25 of the cylinder head at 27, the other to a notch 28 formed on the fixed core.
  • the trigger shown in FIG. 7 can be given the evolution of the attraction force F as a function of the air gap "e".
  • curve III in solid line obtained thanks to the trigger of the invention produces a work area Z of substantially constant effort.
  • a preferred profile of the end of the fixed protruding core 2 is illustrated in FIG.
  • the slope of the curvilinear sides 29 of connection of the nose 11a to the body 11b of the projecting core gradually increases by approximately 5 ° to 90 ° from the nose towards the body; the width “e l “ of the end of the nose lla is at least equal to the thickness "e” of the sheet from which the core is cut; similarly, the width “e 2 " of cut sections provided at the base of the curvilinear sides 29 is at least equal to the thickness "e" of the sheet.
  • the force and acceleration communicated to the movable core during actuation of the trigger are thus made substantially constant over a wide range by means of extremely simple arrangements.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Breakers (AREA)

Abstract

Dispositif de déclenchement rapide à maximum de courant, comprenant un noyau fixe et un noyau mobile de formes complémentaires et disposés dans un même plan en délimitant entre eux un entrefer. Les noyaux fixe et mobile sont obtenus par découpe à plat et présentent des profils complémentaires de forme générale curviligne avec des côtés (29) dont la pente par rapport à l'axe principal (X-X) du noyay saillant augmente progressivement du nez (11a) vers le corps (11b). Application aux appareils de protection contre les courtcircuits.Rapid tripping device with overcurrent, comprising a fixed core and a movable core of complementary shapes and arranged in the same plane, delimiting between them an air gap. The fixed and mobile cores are obtained by flat cutting and have complementary profiles of generally curvilinear shape with sides (29) whose slope relative to the main axis (XX) of the protruding kernay gradually increases from the nose (11a) towards the body (11b). Application to short circuit protection devices.

Description

L'invention se rapporte aux dispositifs déclencheurs rapides utilisés dans les petits appareils de protection contre les court-circuits. Ces dispositifs comprennent un bobinage associé à un circuit magnétique comportant une culasse, un noyau fixe et un noyau mobile à faible inertie pour la commande mécanique de la coupure de l'appareil de protection associé, ces noyaux étant séparés par un entrefer placé dans la région de flux maximum.The invention relates to quick release devices used in small short circuit protection devices. These devices include a coil associated with a magnetic circuit comprising a yoke, a fixed core and a movable core with low inertia for the mechanical control of the cut-off of the associated protective device, these cores being separated by an air gap placed in the region maximum flow.

Il est connu de réaliser des dispositifs déclencheurs à noyau mobile plat afin de diminuer l'épaisseur du dispositif de protection associé. Toutefois, ces dispositifs ont besoin d'être perfectionnés sur le plan de la simplicité et du coût de fabrication.It is known to produce trip devices with a flat movable core in order to reduce the thickness of the associated protection device. However, these devices need to be improved in terms of simplicity and manufacturing cost.

De plus, il est souhaitable d'obtenir, dans un déclencheur rapide, un effort d'attraction sensiblement constant en fonction de la variation de l'entrefer entre le noyau fixe et le noyau mobile ; or, dans les déclencheurs connus, ce niveau constant de l'effort d'attraction ne peut pas être réalisé en raison de la présence, sur le côté des noyaux, de parois parallèles au sens de déplacement du noyau mobile ; ou bien il ne peut s'obtenir qu'au prix de dispositions complexes.In addition, it is desirable to obtain, in a rapid release, a substantially constant attraction force as a function of the variation of the air gap between the fixed core and the movable core; however, in known triggers, this constant level of the attraction force cannot be achieved due to the presence, on the side of the cores, of walls parallel to the direction of movement of the mobile core; or it can only be obtained at the cost of complex arrangements.

La présente invention a notamment pour but d'optimiser d'une manière très simple l'évolution de la force d'attraction produite entre le noyau fixe et le noyau mobile en fonction de leur entrefer. Elle a également pour but de faciliter la réalisation, sous un encombrement et avec un coût réduits, d'un dispositif de déclenchement rapide pour appareil de protection de faible épaisseur.The object of the present invention is in particular to optimize in a very simple manner the evolution of the force of attraction produced between the fixed core and the movable core as a function of their air gap. It also aims to facilitate the realization, in a space and with a reduced cost, of a quick release device for thin protective device.

Suivant l'invention, ce résultat est atteint dans un dispositif du type décrit en préambule du fait que les deux noyaux sont obtenus par découpe à plat et présentent des profils complémentaires de forme générale curviligne, celui des deux noyaux qui est saillant comprenant un nez et un corps, le nez étant raccordé au corps par des côtés dont la pente par rapport à l'axe principal du noyau saillant augmente progressivement du nez vers le corps.According to the invention, this result is achieved in a device of the type described in the preamble in that the two cores are obtained by flat cutting and have complementary profiles of generally curvilinear shape, that of the two cores which is protruding comprising a nose and a body, the nose being connected to the body by sides whose slope with respect to the main axis of the projecting core gradually increases from the nose to the body.

Le noyau à nez saillant présente ainsi une extrémité relativement effilée selon un axe principal et inscrite à l'intérieur d'un triangle dont la base est de dimension égale à la largeur du corps du noyau et dont la hauteur est sensiblement portée par l'axe principal du noyau.The protruding nose core thus has a relatively tapered end along a main axis and inscribed inside a triangle whose base is of dimension equal to the width of the core body and whose height is substantially carried by the axis main nucleus.

Il en résulte que, lorsque l'entrefer diminue au cours d'un actionnement du dispositif déclencheur, l'effort d'attraction entre les noyaux reste sensiblement constant dans une large plage grâce à la progressivité de variation de la pente de leurs côtés, la variation de cette pente étant par exemple comprise entre environ 5° près du nez et 90° près du corps du noyau saillant. L'absence sur chaque noyau de côtés parallèles à leur axe principal supprime de la courbe effort/entrefer toute bosse préjudiciable à l'accélération du noyau mobile.As a result, when the air gap decreases during actuation of the triggering device, the attraction force between the cores remains substantially constant over a wide range thanks to the progressive variation in the slope of their sides, the variation of this slope being for example between approximately 5 ° near the nose and 90 ° near the body of the projecting core. The absence on each core of sides parallel to their main axis removes from the effort / gap curve any bump detrimental to the acceleration of the movable core.

L'extrémité du nez du noyau saillant peut présenter une largeur - et/ou les côtés curvilignes de ce noyau peuvent présenter des pans coupés de longueur - au moins égale à l'épaisseur de la tôle dans laquelle est découpé le noyau. Le noyau fixe peut avantageusement présenter au moins un méplat qui se loge dans une ouverture correspondante d'une face de la culasse ou de l'appareil de protection, tandis que le noyau mobile est monté dans une fenêtre oblongue de guidage ménagée dans une face parallèle de la culasse. Lorsque la culasse a la forme d'un U, le noyau fixe découpé forme par exemple un pont de fermeture du flux dont les extrémités constituent les méplats d'appui.The end of the nose of the projecting core may have a width - and / or the curvilinear sides of this core may have sections cut to length - at least equal to the thickness of the sheet from which the core is cut. The fixed core may advantageously have at least one flat which is housed in a corresponding opening on one face of the cylinder head or of the protective device, while the movable core is mounted in an oblong guide window formed in a parallel face. of the breech. When the cylinder head has the shape of a U, the cut-out fixed core forms, for example, a flow closure bridge, the ends of which constitute the support flats.

Les avantages ainsi que les particularités de l'invention apparaîtront clairement à la lumière de la description ci-après.The advantages as well as the particularities of the invention will become clear in the light of the description below.

Au dessin annexé :

  • la figure 1 représente en perspective le circuit magnétique d'un dispositif déclencheur conforme à un premier mode d'exécution de l'invention ;
  • les figures 2 à 5 illustrent des variantes ;
  • la figure 6 montre schématiquement la disposition de la bobine ;
  • la figure 7 représente diverses courbes de variation de la force d'attraction en fonction de l'entrefer ;
  • les figures 8 et 9 représentent en vue de face l'extrémité du noyau fixe saillant dans des modes de réalisation préférés.
In the attached drawing:
  • Figure 1 shows in perspective the magnetic circuit of a trip device according to a first embodiment of the invention;
  • Figures 2 to 5 illustrate variants;
  • Figure 6 schematically shows the arrangement of the coil;
  • FIG. 7 represents various curves of variation of the force of attraction as a function of the air gap;
  • Figures 8 and 9 show a front view of the end of the projecting fixed core in preferred embodiments.

Le dispositif déclencheur représenté sur les figures comprend un circuit magnétique à culasse 1, par exemple en acier cuivré électrolytique ou en acier et cuivre colaminés, et un noyau mobile plat 2, ainsi qu'un noyau fixe plat 3, de profils complémentaires obtenus par découpage et situés dans un même plan.The trigger device shown in the figures comprises a magnetic circuit with yoke 1, for example made of copper-plated electrolytic steel or of colaminated steel and copper, and a flat movable core 2, as well as a flat fixed core 3, of complementary profiles obtained by cutting and located in the same plane.

Le noyau mobile 2 joue le rôle d'organe déclencheur magnétique rapide susceptible d'agir, en fonction du courant circulant dans une bobine 4 supportée par une carcasse isolante en forme de fourreau 5, sur un appareil de protec- tion non représenté au moyen d'un mécanisme de transmission egalement non représenté.The movable core 2 acts as a rapid magnetic trip member capable of acting, as a function of the current flowing in a coil 4 supported by an insulating carcass in the form of a sheath 5, on a protective device not shown by means of a transmission mechanism also not shown.

Le noyau mobile est logé de manière à pouvoir coulisser dans une fenêtre 6 ménagée dans une branche 7 de la culasse, celle-ci présentant d'autre part selon les cas une branche parallèle opposée 8 et deux branches latérales 9, 10 (figures 1 et 2) ou seulement deux branches latérales 9, 10 (figures 3 et 4). Dans tous les cas, le noyau fixe 3 présente une extrémité en forme de nez ou de téton lla, un corps llb et un profil curviligne particulier de raccordement du nez au corps dont le rôle, en liaison avec un évidement 12 à profil complémentaire du noyau mobile 3, sera explicité plus loin. Il va de soi que le noyau saillant ici représenté par le noyau fixe peut aussi bien être constitué par le noyau mobile ; les deux noyaux pourraient également être mobiles.The movable core is housed so as to be able to slide in a window 6 formed in a branch 7 of the cylinder head, the latter having on the other hand, as the case may be, an opposite parallel branch 8 and two lateral branches 9, 10 (FIGS. 1 and 2) or only two lateral branches 9, 10 (Figures 3 and 4). In all cases, the fixed core 3 has a nose-shaped or nipple-shaped end 11a, a body 11b and a particular curvilinear profile for connecting the nose to the body whose role, in connection with a recess 12 with a profile complementary to the core mobile 3, will be explained later. It goes without saying that the protruding core here represented by the fixed core may as well be constituted by the movable core; the two cores could also be mobile.

Dans les formes d'exécution des figures 1 et 2, le noyau fixe 2 est engagé et serti au moyen d'un méplat 13 dans une fenêtre 14 de la branche 8 de la culasse ; celle-ci offre donc une forme de U refermée par la branche 7 constituée par une barrette emboîtée et sertie sur les branches 9, 10 (figure 1) ou se compose de deux L, la, lb, emboîtés et comportant l'un les branches 7, 10 et l'autre les branches 8, 9 (figure 2).In the embodiments of Figures 1 and 2, the fixed core 2 is engaged and crimped by means of a flat 13 in a window 14 of the branch 8 of the cylinder head; it therefore offers a U shape closed by the branch 7 constituted by a nested bar and crimped on the branches 9, 10 (Figure 1) or consists of two L, la, lb, nested and comprising one of the branches 7, 10 and the other the branches 8, 9 (Figure 2).

Dans les formes d'exécution des figures 3 et 4, la culasse est constituée d'une seule pièce en forme de U comportant les trois branches 7, 9, 10 ; le noyau fixe 2 présente, à sa partie arrière, un pont 15 de fermeture du flux muni de deux méplats latéraux 16, 17 permettant la fixation du noyau 2 par soudage sur des épaulements 18, 19 (figure 3) ou par sertissage et/ou soudage dans des fentes 20, -21 (figure 4), les épaulements ou les fentes venant de découpage aux extrémités des branches 9, 10 de la culasse découpée 1.In the embodiments of Figures 3 and 4, the cylinder head consists of a single U-shaped piece comprising the three branches 7, 9, 10; the fixed core 2 has, at its rear part, a bridge 15 for closing the flow provided with two lateral flats 16, 17 allowing the core 2 to be fixed by welding on shoulders 18, 19 (FIG. 3) or by crimping and / or welding in slots 20, -21 (FIG. 4), the shoulders or the slots coming from cutting at the ends of the branches 9, 10 of the cut cylinder head 1.

Il est prévu dans la branche 10 de la culasse une encoche 22 de passage pour un fil de connexion de la bobine 4 et dans la branche 9 de la culasse, une encoche 23 de passage de l'autre fil de connexion de la bobine. Dans le mode d'exécution de la figure 4, le premier fil de connexion est soudé à l'encoche 22 et la branche correspondante de la culasse joue le rôle de support du contact fixe de l'appareil de protection, dont le support non représenté du contact mobile coopère directement avec la face extérieure de la branche 9 ; la sortie de la bobine par l'encoche 23 est évidemment isolée. Des encoches telles que 24 sont prévues dans le noyau fixe 2 pour faciliter le positionnement de la bobine 4 et de sa carcasse 5.There is provided in branch 10 of the cylinder head a notch 22 for passage for a coil connection wire 4 and in branch 9 of the cylinder head, a notch 23 for passage of the other coil connection wire. In the embodiment of Figure 4, the first connection wire is welded to the notch 22 and the corresponding branch of the cylinder head acts as a support for the fixed contact of the protective device, including the support not shown the movable contact cooperates directly with the outer face of the branch 9; the output of the coil through the notch 23 is obviously isolated. Notches such as 24 are provided in the fixed core 2 to facilitate the positioning of the coil 4 and its carcass 5.

Dans le mode d'exécution de la figure 5, la carcasse de la bobine et le noyau fixe 2 sont supportés par une pièce isolante non représentée venant éventuellement de moulage avec l'appareil de protection, et la culasse 1 prend une forme simplifiée en L dont l'une des branches 25 comprend la fenêtre 6 de guidage du noyau mobile 3 et dont l'autre branche 26 sert de support au contact fixe de l'appareil de protection. L'un des fils de connexion peut être soudé sur la branche 25 de la culasse en 27, l'autre sur une encoche 28 ménagée sur le noyau fixe.In the embodiment of Figure 5, the coil carcass and the fixed core 2 are supported by an insulating part not shown possibly coming from molding with the protective device, and the cylinder head 1 takes a simplified shape in L one of the branches 25 of which comprises the window 6 for guiding the movable core 3 and the other branch 26 of which serves as a support for the fixed contact of the protective device. One of the connection wires can be welded to the branch 25 of the cylinder head at 27, the other to a notch 28 formed on the fixed core.

On constate sur la figure 6 que la bobine 4 en fil plat supportée par la carcasse isolante 5 est placée autour des noyaux 2, 3 et passe dans l'intervalle réalisé entre ceux-ci et les branches latérales 9, 10 de la culasse.It can be seen in FIG. 6 that the coil 4 in flat wire supported by the insulating carcass 5 is placed around the cores 2, 3 and passes in the interval produced between these and the lateral branches 9, 10 of the cylinder head.

Il est clair que les réalisations décrites sont de fabrication simple et peuvent avantageusement présenter une faible épaisseur. La forme plate des noyaux fixe et mobile augmente le périmètre de circulation des courants de Foucault, donc réduit leur intensité et leur effet perturbateur, d'où une augmentation de la rapidité du déclencheur.It is clear that the embodiments described are simple to manufacture and can advantageously have a small thickness. The flat shape of the fixed and mobile cores increases the perimeter of circulation of the eddy currents, therefore reduces their intensity and their disturbing effect, hence an increase in the speed of the trigger.

Par une découpe optimale des noyaux, on peut conférer au déclencheur la caractéristique représentée figure 7 d'évolution de l'effort d'attraction F en fonction de l'entrefer "e". Par rapport à une courbe 1 en tirets relative à un déclencheur classique à noyau de section triangulaire ou à une courbe II en tirets relative à un noyau dont une partie des côtés est parallèle à l'axe, la courbe III en trait plein obtenue grâce au déclencheur de l'invention produit une zone de travail Z d'effort sensiblement constant. Un profil préférentiel de l'extrémité du noyau saillant fixe 2 est illustré par la figure 8 où l'on voit le nez lla relié au corps llb du noyau par un profil à flancs curvilignes 29 ; ce profil est inscrit à l'intérieur d'un triangle dont la base 30 est de dimension égale à la largeur "1" du noyau et dont la hauteur est portée par l'axe principal XX du noyau.By optimal cutting of the cores, the trigger shown in FIG. 7 can be given the evolution of the attraction force F as a function of the air gap "e". Compared to a dashed curve 1 relating to a conventional trip unit with a triangular section core or to a dashed curve II relating to a core of which a part of the sides is parallel to the axis, curve III in solid line obtained thanks to the trigger of the invention produces a work area Z of substantially constant effort. A preferred profile of the end of the fixed protruding core 2 is illustrated in FIG. 8 where we see the nose 11a connected to the body 11b of the core by a profile with curvilinear sides 29; this profile is inscribed inside a triangle whose base 30 is of dimension equal to the width "1" of the core and whose height is carried by the main axis XX of the core.

Comme illustré par la figure 9, la pente des côtés curvilignes 29 de raccordement du nez lla au corps llb du noyau saillant augmente progressivement d'environ 5° à 90° du nez vers le corps ; la largeur "el" de l'extrémité du nez lla est au moins égale à l'épaisseur "e" de la tôle dans laquelle est découpé le noyau ; de même, la largeur "e2" de pans coupés prévus à la base des côtés curvilignes 29 est au moins égale à l'épaisseur "e" de la tôle.As illustrated in FIG. 9, the slope of the curvilinear sides 29 of connection of the nose 11a to the body 11b of the projecting core gradually increases by approximately 5 ° to 90 ° from the nose towards the body; the width "e l " of the end of the nose lla is at least equal to the thickness "e" of the sheet from which the core is cut; similarly, the width "e 2 " of cut sections provided at the base of the curvilinear sides 29 is at least equal to the thickness "e" of the sheet.

L'effort et l'accélération communiqués au noyau mobile lors d'un actionnement du déclencheur sont ainsi rendus sensiblement constants sur une large plage au moyen de dispositions extrêmement simples.The force and acceleration communicated to the movable core during actuation of the trigger are thus made substantially constant over a wide range by means of extremely simple arrangements.

Il va de soi que l'on peut apporter des modifications aux modes de réalisation décrits sans pour autant sortir du cadre de l'invention.It goes without saying that modifications can be made to the embodiments described without departing from the scope of the invention.

Claims (10)

1. Dispositif de déclenchement rapide à maximum de courant pour appareil de protection contre les court-circuits, comprenant un bobinage associé à un circuit magnétique comportant une culasse et deux noyaux dont l'un au moins est mobile pour la commande de la coupure de l'appareil de protection, les noyaux étant de formes complémentaires et disposés dans un même plan en délimitant entre eux un entrefer,
caractérisé en ce que les deux noyaux sont obtenus par découpe à plat et présentent des profils complémentaires de forme générale curviligne, celui (2) des deux noyaux (2, 3) qui est saillant comprenant un nez (lla) et un corps (llb), le nez étant raccordé au corps par des côtés (29) dont la pente par rapport à l'axe principal (X-X) du noyau saillant augmente progressivement du nez vers le corps.1. Rapid overcurrent tripping device for a short-circuit protection device, comprising a coil associated with a magnetic circuit comprising a yoke and two cores, at least one of which is movable for controlling the breaking of the 'protective device, the cores being of complementary shapes and arranged in the same plane delimiting between them an air gap,
characterized in that the two cores are obtained by flat cutting and have complementary profiles of generally curvilinear shape, that (2) of the two cores (2, 3) which is protruding comprising a nose (lla) and a body (llb) , the nose being connected to the body by sides (29) whose slope with respect to the main axis (XX) of the projecting core gradually increases from the nose to the body. 2. Dispositif selon la revendication 1,
caractérisé en ce que le noyau (2) à nez saillant (lla) a une extrémité inscrite à l'intérieur d'un triangle dont la base est de dimension égale à la largeur du corps du noyau et dont la hauteur est sensiblement portée par l'axe principal du noyau.2. Device according to claim 1,
characterized in that the protruding nose core (2) (lla) has one end inscribed inside a triangle whose base is of dimension equal to the width of the core body and whose height is substantially carried by the main axis of the nucleus. 3. Dispositif selon l'une des revendications 1 et 2, caractérisé en ce que la variation progressive de la pente des côtés curvilignes (29) du noyau saillant (2) s'effectue dans un intervalle compris entre environ 5° près du nez (lla) et 90° près du corps (llb) du noyau.3. Device according to one of claims 1 and 2, characterized in that the progressive variation of the slope of the curvilinear sides (29) of the projecting core (2) takes place in an interval between approximately 5 ° near the nose ( lla) and 90 ° near the body (llb) of the nucleus. 4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que l'extrémité du nez (lla) du noyau saillant présente une largeur (el) au moins égale à l'épaisseur de la tôle dans laquelle est découpé le noyau.4. Device according to one of claims 1 to 3, characterized in that the end of the nose (lla) of the projecting core has a width (e l ) at least equal to the thickness of the sheet from which the core. 5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que les côtés curvilignes (29) du noyau présentent au raccordement avec le corps (llb) du noyau des pans coupés de longueur (e2) au moins égale à l'épaisseur de la tôle.5. Device according to one of claims 1 to 4, characterized in that the curvilinear sides (29) of the core have, at the connection with the body (llb) of the core, cut sides of length (e 2 ) at least equal to l 'sheet thickness. 6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que le noyau fixe présente au moins un méplat (13, 16, 17) qui se loge dans une ouverture correspondante (14, 18, 19) d'une face (8) de la culasse (1) ou de l'appareil de protection, tandis que le noyau mobile (3) est monté dans une face parallèle (7, 25) de la culasse.6. Device according to one of claims 1 to 5, characterized in that the fixed core has at least one flat (13, 16, 17) which is housed in a corresponding opening (14, 18, 19) on one side (8) of the cylinder head (1) or of the protective device, while the movable core (3) is mounted in a parallel face (7, 25) of the cylinder head. 7. Dispositif selon la revendication 6,
caractérisé en ce que la culasse (1) a la forme d'un U, le noyau fixe plat (2) formant un pont (15) de fermeture du flux dont les extrémités constituent les méplats (16, 17) de logement sur des épaulements (18, 19) ou dans des fentes (20, 21) des branches latérales (9, 10) de la culasse.7. Device according to claim 6,
characterized in that the cylinder head (1) has the shape of a U, the fixed flat core (2) forming a bridge (15) for closing the flow, the ends of which constitute the flats (16, 17) for housing on shoulders (18, 19) or in slots (20, 21) of the lateral branches (9, 10) of the cylinder head. 8. Dispositif selon la revendication 7,
caractérisé en ce que l'une (10) des branches latérales de la culasse (1) en U est électriquement reliée en (22, 27) à l'un des fils de connexion de la bobine (4) et constitue le support de contact fixe de l'appareil de protection.8. Device according to claim 7,
characterized in that one (10) of the lateral branches of the U-shaped yoke (1) is electrically connected at (22, 27) to one of the connection wires of the coil (4) and constitutes the contact support protection device. 9. Dispositif selon la revendication 6,
caractérisé en ce que la culasse (1) a la forme d'un L dont l'une des branches (25) présente la fenêtre de guidage (6) du noyau mobile (3) et dont l'autre branche (26) constitue le support du contact fixe de l'appareil de protection et est électriquement reliée à l'un des fils de connexion de la bobine (4), tandis que le noyau fixe (2) est isolé de la culasse en L, constitue le support de la carcasse (5) de la bobine et est électriquement relié à l'autre fil de connexion de la bobine.9. Device according to claim 6,
characterized in that the cylinder head (1) has the shape of an L, one of the branches (25) of which has the guide window (6) of the movable core (3) and of which the other branch (26) constitutes the support of the fixed contact of the protective device and is electrically connected to one of the coil connection wires (4), while the fixed core (2) is isolated from the L-shaped cylinder head, constitutes the support for the coil housing (5) and is electrically connected to the other coil connection wire. 10. Appareil de protection contre les court-circuits comprenant le dispositif de déclenchement rapide selon l'une des revendications 1 à 9.10. A short-circuit protection device comprising the quick release device according to one of claims 1 to 9.
EP85400257A 1984-03-20 1985-02-14 Quick over-current trip mechanism Expired EP0159207B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8404260A FR2561818B1 (en) 1984-03-20 1984-03-20 QUICK TRIGGER DEVICE AT MAXIMUM CURRENT
FR8404260 1984-03-20

Publications (2)

Publication Number Publication Date
EP0159207A1 true EP0159207A1 (en) 1985-10-23
EP0159207B1 EP0159207B1 (en) 1987-07-22

Family

ID=9302213

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Application Number Title Priority Date Filing Date
EP85400257A Expired EP0159207B1 (en) 1984-03-20 1985-02-14 Quick over-current trip mechanism

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US (1) US4605918A (en)
EP (1) EP0159207B1 (en)
JP (1) JPS60212937A (en)
DE (1) DE3560377D1 (en)
FR (1) FR2561818B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5355108A (en) * 1992-10-05 1994-10-11 Aura Systems, Inc. Electromagnetically actuated compressor valve
DE19841499A1 (en) * 1998-09-10 2000-03-30 Beru Ag Spring-loaded actuation solenoid for e.g. vehicle valve, includes armature and core with varied angles of linear taper and thicknesses varying axially to produce maximum terminal closing- and pull-in forces
CN104485194B (en) * 2014-12-14 2016-08-17 成都大学 A kind of variable magnetic force line distribution proportion electric magnet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1529258A (en) * 1967-06-27 1968-06-14 Binder Magnete plunger core electromagnet
WO1983003387A1 (en) * 1982-03-29 1983-10-13 Ncr Co Print wire actuating device and method of manufacture thereof
FR2527831A1 (en) * 1982-05-28 1983-12-02 Telemecanique Electrique PLUNGER CORE, METHOD FOR MANUFACTURING SAME, AND RELAY WITH INTENSITY THRESHOLD THUS EQUIPPED

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992304A (en) * 1958-01-06 1961-07-11 Cook Electric Co Electromagnetic thrust motor
US3593240A (en) * 1969-03-10 1971-07-13 Whirlpool Co Solenoid structure having single sheet metal plunger and/or yoke
DE3175082D1 (en) * 1981-12-14 1986-09-11 Sprecher & Schuh Ag Pair of iron cores, and coil form bobbin for alternating current protection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1529258A (en) * 1967-06-27 1968-06-14 Binder Magnete plunger core electromagnet
WO1983003387A1 (en) * 1982-03-29 1983-10-13 Ncr Co Print wire actuating device and method of manufacture thereof
FR2527831A1 (en) * 1982-05-28 1983-12-02 Telemecanique Electrique PLUNGER CORE, METHOD FOR MANUFACTURING SAME, AND RELAY WITH INTENSITY THRESHOLD THUS EQUIPPED

Also Published As

Publication number Publication date
JPS60212937A (en) 1985-10-25
FR2561818B1 (en) 1988-04-15
DE3560377D1 (en) 1987-08-27
EP0159207B1 (en) 1987-07-22
FR2561818A1 (en) 1985-09-27
US4605918A (en) 1986-08-12

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