EP1501112B1 - Improved magnetic sub-unit and circuit breaker comprising this sub-unit - Google Patents

Improved magnetic sub-unit and circuit breaker comprising this sub-unit Download PDF

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Publication number
EP1501112B1
EP1501112B1 EP04360055A EP04360055A EP1501112B1 EP 1501112 B1 EP1501112 B1 EP 1501112B1 EP 04360055 A EP04360055 A EP 04360055A EP 04360055 A EP04360055 A EP 04360055A EP 1501112 B1 EP1501112 B1 EP 1501112B1
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EP
European Patent Office
Prior art keywords
magnetic
unit
striker
core
sub
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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EP04360055A
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German (de)
French (fr)
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EP1501112A1 (en
Inventor
Jean-Marc Voirpin
Denis Herbrech
Jean-Michel Vigneron
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Hager Electro SAS
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Hager Electro SAS
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Priority to SI200430099T priority Critical patent/SI1501112T1/en
Publication of EP1501112A1 publication Critical patent/EP1501112A1/en
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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
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • 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
    • H01H71/322—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with plunger type armature

Definitions

  • the trigger comprises more precisely an induction coil mounted longitudinally in a magnetic yoke, and surrounding the movable core, which is associated with the striker and a fixed core, a return spring disposed between the cores to complete the mounting.
  • This spring makes it possible in particular to recall the mobile core in position rest, firing pin in the inactive position, that is to say away from a mechanical lock allowing the opening of the contacts by tilting of the movable contact.
  • the cylinder head is made of a sheet of magnetic material generally surrounding the coil to properly channel the lines of fields produced, when the coil is traversed by a current.
  • the magnetic subassemblies mounted in one piece are then arranged in a portion of the plastic shell of the housing, at the time of assembly of the circuit breaker.
  • Magnetic subassemblies are known, for example from WO 99/63564, comprising a fixed guide cylinder in which the mobile core associated with the firing pin moves, as well as a fixed magnetic core.
  • An object of the present invention is therefore to reduce the number of constituent parts of the magnetic subassembly and to simplify them to facilitate their assembly, while maintaining the reliability of said magnetic subassembly.
  • the mobile support and the striker are made in one piece, for example plastic.
  • the movable core is further devoid of any chamfering, drilling or countersinking, thus increasing its polar surface. No step of securing the striker on the mobile core is also necessary.
  • the guide means comprises for example an opening in the cylinder head, and through which the striker.
  • the fixed magnetic core is for example integral with the cylinder head.
  • the ends of the induction coil depart tangentially from the turns of the coil.
  • Such a configuration makes it possible to avoid folding operations of said ends and consequently to reduce the cost price of such an induction coil.
  • the magnetic subassembly also comprises a movable magnetic core (3) made of a magnetic material, for example steel.
  • the core (3) has a substantially cylindrical shape and two polar faces (4) and (5).
  • a striker (6) moving with the movable core (3), is also provided and makes it possible to open an electrical contact when it moves from an inactive position to an active position.
  • An elastic return means is provided so as to be biased by the movement of the striker (6).
  • the elastic return means (7a, 7b) automatically returns the striker (6) to its inactive position and the electrical contact can again be closed .
  • a connection terminal (10) to the magnetic subassembly to which the second end (2b) of the coil (2) is connected is also provided.
  • the magnetic subassembly shown in FIG. (2) has an air gap (11) formed between the polar face (5) of the movable core (3) and an internal face (12) of the cylinder head (1), which are opposite one (5) of the other (12).
  • Part of the yoke (1), facing the polar face (5) of the movable magnetic core (3) then constitutes a fixed magnetic core.
  • the gap (11) is devoid of a fixed magnetic core and is at least partially offset outside the magnetic coil (2).
  • the movable core (3) is also simplified in its shape, which is for example cylindrical.
  • the magnetic subassembly comprises a fixed magnetic core (3a) integral with the yoke (1) and traversed by the striker (6).
  • the gap (11) is located between the polar faces facing each other, the movable core (3) and the fixed core (3a). The gap (11) then extends into the interior volume delimited by the magnetic coil (2).
  • the fixed core (3a) is fixed on the yoke (1) by any known means, and in particular by a mounting force or welding.
  • the elastic return means makes it possible, as soon as the flow of electric current in the induction coil (2) is interrupted, to bring back the subassembly mobile mechanics, namely the movable core (3), the movable support (13) and the striker (6) in its inactive position.
  • the mobile support (13) and the striker (6) are made in one piece, for example plastic or any other electrical insulating material.
  • the movable support (13) is a cylindrical piece terminating at one of its ends by a rod constituting the striker (6).
  • the manufacture of such a mobile support (13) by injection is particularly simple and its dimensions are chosen so as to secure it with the movable core (3) by a simple fitting operation.
  • Other known technical means of the bonding type may also be provided for securing the movable core (3) with the movable support (13).
  • the ends (2a) and (2b) of the induction coil (2) depart tangentially from the turns of the coil (2). Any folding operation of said ends (2a, 2b) is suppressed. This gives in more than one way, a reduction in the cost of such an induction coil (2).
  • the yoke (1) is non-magnetic and no fixed magnetic core is attached to said yoke (1).
  • the displacement of the mobile core 3 is obtained by a given location area of a maximum density of magnetic field lines, and to which it is driven. Such a displacement suffices to actuate the firing pin (6).
  • FIG 8 shows a partially cut-away view, for the sake of clarity, of a circuit breaker (15) according to the invention.
  • the circuit breaker (15) incorporating a magnetic subassembly according to the invention comprises a modular housing (16) provided with fixing means (17), for example on a support of the mounting rail type (not shown).
  • the circuit breaker (15) has a rocker-type operating member (18) for moving the movable contact (8a) between an open and closed position (see FIG. 8) of the electrical connection with the contact. fixed (8).
  • the striker (6) acts on a mechanical lock (19) known as such, which moves the movable contact (8a) to open the electrical connection with the fixed contact (8).
  • This opening causes the interruption of the circulation of an electric current between the terminals of connection (10) of the circuit breaker and automatically returns the handle (18) to the position corresponding to the separation of the fixed contacts (8) and movable (8a), thanks to the mechanical lock (19).

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Air Bags (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

The sub-assembly has an induction coil (2), a movable magnetic core (3), and a striker (6) that moves with the movable magnetic core. Spring plates are solicited by the movement of the striker. The movable core is housed in a movable support (13) that is driven by the movable core and integrated to the striker. The spring plates are positioned between the support and a magnetic yoke (1). An independent claim is also included for an electrical circuit breaker comprising a magnetic sub-assembly.

Description

La présente invention concerne un sous-ensemble magnétique pour appareillage électrique modulaire du type disjoncteur, ainsi qu'un disjoncteur incorporant un tel sous-ensemble.The present invention relates to a magnetic subassembly for modular electrical equipment of the breaker type, and a circuit breaker incorporating such a subassembly.

Les disjoncteurs de protection de ligne comportent généralement, dans un boîtier modulaire à coque en plastique, un circuit s'étendant entre deux bornes et comprenant un bilame de déclenchement thermique pour la protection de la ligne contre les surcharges et, entre une borne et un contact fixe, un organe électromagnétique de disjonction ou déclencheur magnétique souvent regroupé avec ces deux composants pour former un sous-ensemble magnétique.The line protection circuit breakers generally comprise, in a modular housing with a plastic shell, a circuit extending between two terminals and comprising a thermal trip bimetallic strip for the protection of the line against overloads and, between a terminal and a contact fixed, an electromagnetic disjunction or magnetic trigger member often grouped with these two components to form a magnetic subassembly.

Le déclencheur magnétique comprend essentiellement une bobine avec un noyau mobile, associés à un percuteur pour assurer, en cas de surintensité, la disjonction par ouverture d'un contact mobile coopérant avec un contact fixe.The magnetic release essentially comprises a coil with a movable core, associated with a striker to ensure, in the event of overcurrent, disjunction by opening a movable contact cooperating with a fixed contact.

Dans la plupart des cas, le déclencheur comprend plus précisément une bobine à induction montée longitudinalement dans une culasse magnétique, et entourant le noyau mobile, lequel est associé au percuteur et à un noyau fixe, un ressort de rappel disposé entre les noyaux venant compléter le montage. Ce ressort permet notamment de rappeler le noyau mobile en position de repos, percuteur en position inactive, c'est-à-dire à distance d'une serrure mécanique permettant l'ouverture des contacts par basculement du contact mobile.In most cases, the trigger comprises more precisely an induction coil mounted longitudinally in a magnetic yoke, and surrounding the movable core, which is associated with the striker and a fixed core, a return spring disposed between the cores to complete the mounting. This spring makes it possible in particular to recall the mobile core in position rest, firing pin in the inactive position, that is to say away from a mechanical lock allowing the opening of the contacts by tilting of the movable contact.

La culasse est constituée d'une tôle en matériau magnétique entourant en général la bobine pour canaliser correctement les lignes de champs produites, lorsque la bobine est parcourue par un courant. Les sous-ensembles magnétiques montés en une seule pièce sont ensuite disposés dans une partie de la coque plastique du boîtier, au moment de l'assemblage du disjoncteur.The cylinder head is made of a sheet of magnetic material generally surrounding the coil to properly channel the lines of fields produced, when the coil is traversed by a current. The magnetic subassemblies mounted in one piece are then arranged in a portion of the plastic shell of the housing, at the time of assembly of the circuit breaker.

Comme leur fonction le laisse supposer, ces sous-ensembles magnétiques sont des éléments essentiels des disjoncteurs, et leur conception fait par conséquent l'objet d'un soin particulier, ainsi que de nombreux tests destinés à éprouver la validité des solutions préconisées. La fonction principale étant liée à l'existence de surintensités brutales, certains de ces tests sont, bien entendu, réalisés dans différentes configurations de courts-circuits, ou à tout le moins avec des courants égaux à plusieurs fois la valeur du courant nominal, pour lesquels les performances du sous-ensemble magnétique sont mesurées.As their function suggests, these magnetic subassemblies are essential elements of circuit breakers, and their design is therefore the subject of special care, as well as many tests to test the validity of the recommended solutions. The main function being related to the existence of sudden overcurrents, some of these tests are, of course, made in different configurations of short circuits, or at least with currents equal to several times the value of the nominal current, for which the performances of the magnetic subassembly are measured.

Pendant ces périodes de fonctionnement extrême, un des paramètres sur lesquels porte notamment et de manière particulièrement rigoureuse le contrôle, est la force d'arrachage des contacts. Le but de ces contrôles, et des ajustements qui en résultent, est d'affiner les conditions de déclenchement de la serrure mécanique par un meilleur contrôle du déclencheur électromagnétique et de la force véhiculée par le percuteur.During these periods of extreme operation, one of the parameters to which particularly and particularly rigorous control relates, is the pulling force of the contacts. The purpose of these controls, and adjustments that result, is to refine the conditions of triggering the mechanical lock by better control of the electromagnetic trigger and the force conveyed by the striker.

L'échauffement des différentes parties du sous-ensemble magnétique est également un paramètre sensible, pour lequel des tests à courant nominal ou légèrement supérieur sont effectués, dans le but de le diminuer autant que possible.The heating of the different parts of the magnetic subassembly is also a sensitive parameter, for which tests with nominal current or slightly higher are carried out, with the aim of reducing it as much as possible.

Il est ainsi connu de réaliser des sous-ensembles magnétiques pour appareillage électronique modulaire du type disjoncteur comportant :

  • une bobine d'induction
  • un noyau magnétique mobile,
  • un percuteur se déplaçant avec le noyau mobile,
  • et un moyen de rappel élastique sollicité par le déplacement du percuteur.
It is thus known to produce magnetic subassemblies for modular circuit-breaker type electronic apparatus comprising:
  • an induction coil
  • a mobile magnetic core,
  • a striker moving with the moving core,
  • and an elastic return means biased by the movement of the firing pin.

On connaît des sous-ensembles magnétiques , par exemple du document WO 99/63564, comportant un cylindre de guidage fixe dans lequel se déplace le noyau mobile associé au percuteur, ainsi qu'un noyau magnétique fixe.Magnetic subassemblies are known, for example from WO 99/63564, comprising a fixed guide cylinder in which the mobile core associated with the firing pin moves, as well as a fixed magnetic core.

Afin de tenir compte de tous les paramètres de fonctionnement et notamment des paramètres de sécurité assurant une fiabilité de l'arrachage des contacts en cas de surintensité, il devient difficile d'agir sur l'un des paramètres sans influencer d'autres paramètres de fonctionnement.In order to take into account all the operating parameters and in particular the safety parameters ensuring a reliability of the pulling of the contacts in case of overcurrent, it becomes difficult to act on one of the parameters without influencing other operating parameters. .

Un objectif de la présente invention vise donc à réduire le nombre de pièces constitutives du sous-ensemble magnétique et de les simplifier pour faciliter leur assemblage, tout en conservant la fiabilité dudit sous-ensemble magnétique.An object of the present invention is therefore to reduce the number of constituent parts of the magnetic subassembly and to simplify them to facilitate their assembly, while maintaining the reliability of said magnetic subassembly.

Un autre objectif de la présente invention vise à augmenter les performances du sous-ensemble magnétique sans pour autant augmenter son encombrement, en vue de son intégration dans un appareillage électrique modulaire.Another object of the present invention is to increase the performance of the magnetic subassembly without increasing its size, for integration into a modular electrical equipment.

Selon l'invention, le noyau mobile est logé dans un support mobile, entraîné par le noyau mobile, et solidaire du percuteur.According to the invention, the mobile core is housed in a mobile support, driven by the mobile core, and secured to the striker.

On obtient ainsi un sous-ensemble mécanique mobile de configuration simplifiée et dont le montage dans une culasse est simplifié.This gives a mobile mechanical subassembly of simplified configuration and the mounting in a cylinder head is simplified.

Selon un exemple de réalisation, le support mobile et le percuteur sont réalisés en une seule pièce, par exemple en matière plastique.According to an exemplary embodiment, the mobile support and the striker are made in one piece, for example plastic.

Le support mobile est par exemple une pièce cylindrique se terminant à l'une de ses extrémités par une tige constituant le percuteur. On obtient ainsi une réduction du nombre de pièces constitutives du sous-ensemble magnétique et un assemblage relativement simple dans la mesure où il suffit d'introduire le noyau mobile dans le cylindre constitutif du support mobile pour obtenir le sous-ensemble mécanique mobile.The movable support is for example a cylindrical piece ending at one of its ends by a rod constituting the striker. This results in a reduction in the number of constituent parts of the magnetic subassembly and a relatively simple assembly insofar as it is sufficient to introduce the movable core into the constituent cylinder of the movable support to obtain the mobile mechanical subassembly.

Le noyau mobile est en outre dépourvu de tout chanfrein, perçage ou lamage, augmentant ainsi sa surface polaire. Aucune étape de solidarisation du percuteur sur le noyau mobile n'est par ailleurs nécessaire.The movable core is further devoid of any chamfering, drilling or countersinking, thus increasing its polar surface. No step of securing the striker on the mobile core is also necessary.

Le moyen de rappel élastique est par exemple monté entre le support mobile et la culasse magnétique. Ce moyen de rappel élastique est par exemple constitué d'une lame flexible. Le positionnement de ce moyen de rappel élastique évite toute interaction avec des lignes de champ magnétique générées dans l'entrefer. Les performances du sous-ensemble magnétique sont ainsi améliorées et son montage dans la culasse se trouve également simplifié de par sa configuration.The elastic return means is for example mounted between the movable support and the magnetic yoke. This elastic return means is for example constituted by a flexible blade. The positioning of this elastic return means avoids any interaction with magnetic field lines generated in the air gap. The performance of the magnetic subassembly is thus improved and its mounting in the cylinder head is also simplified by its configuration.

Selon un exemple de réalisation, le sous-ensemble magnétique comporte un moyen de guidage en translation du percuteur.According to an exemplary embodiment, the magnetic subassembly comprises a guide means in translation of the firing pin.

Le moyen de guidage comporte par exemple une ouverture ménagée dans la culasse, et traversée par le percuteur.The guide means comprises for example an opening in the cylinder head, and through which the striker.

Le guidage en translation du percuteur assure indirectement le guidage en translation du support mobile et par conséquent du sous-ensemble mécanique mobile. Aucun moyen de guidage additionnel n'est nécessaire, contribuant ainsi à la réduction du nombre de pièces constitutives du sous-ensemble magnétique conforme à l'invention.The translation guide of the striker indirectly ensures the translational guidance of the movable support and consequently of the mobile mechanical subassembly. No additional guiding means is necessary, thus contributing to the reduction of the number of parts constituting the magnetic subassembly according to the invention.

Selon un autre exemple de réalisation, le moyen de guidage comporte une ouverture ménagée dans un noyau fixe et traversée par le percuteur.According to another exemplary embodiment, the guiding means comprises an opening formed in a fixed core and traversed by the striker.

Le noyau magnétique fixe est par exemple solidaire de la culasse.The fixed magnetic core is for example integral with the cylinder head.

Selon un exemple de réalisation, la culasse est réalisée en un matériau magnétique, constituant un élément magnétique complémentaire fixe.According to an exemplary embodiment, the yoke is made of a magnetic material constituting a fixed complementary magnetic element.

Selon un exemple de réalisation du sous-ensemble magnétique conforme à l'invention, une partie de la culasse, en regard d'une face polaire du noyau magnétique mobile, constitue l'élément magnétique complémentaire fixe.According to an exemplary embodiment of the magnetic subassembly according to the invention, a portion of the yoke facing a polar face of the movable magnetic core constitutes the fixed complementary magnetic element.

La culasse peut aussi être amagnétique et associée ou non à un noyau magnétique fixe.The cylinder head can also be non-magnetic and associated or not with a fixed magnetic core.

Le sous-ensemble magnétique conforme à l'invention présente aussi l'avantage d'être adaptable à diverses contraintes, tant sur le plan structurel que fonctionnel.The magnetic subassembly according to the invention also has the advantage of being adaptable to various constraints, both structurally and functionally.

Selon un exemple de réalisation, la bobine d'induction est une bobine à spires disjointes. Le nombre de spires peut avantageusement être réduit dans la mesure où la surface polaire du noyau mobile est augmentée. L'absence de contact entre les spires adjacentes permet en outre d'éviter de les enduire d'une couche d'émail isolant électrique, contribuant à une réduction du prix de revient d'une telle bobine d'induction sans pour autant nuire aux performances du sous-ensemble magnétique.According to an exemplary embodiment, the induction coil is a coil with disjoint turns. The number of turns can advantageously be reduced insofar as the polar surface of the mobile core is increased. The absence of contact between the adjacent turns also makes it possible to avoid coating them with a layer of electrical insulating enamel, contributing to a reduction in the cost price of such an induction coil without adversely affecting performance. magnetic subassembly.

Selon un exemple de réalisation, les extrémités de la bobine d'induction s'écartent tangentiellement des spires de la bobine. Une telle configuration permet d'éviter des opérations de pliage desdites extrémités et par conséquent de réduire le prix de revient d'une telle bobine d'induction.According to an exemplary embodiment, the ends of the induction coil depart tangentially from the turns of the coil. Such a configuration makes it possible to avoid folding operations of said ends and consequently to reduce the cost price of such an induction coil.

La présente invention trouve particulièrement son application dans le domaine des disjoncteurs électriques, incorporant un sous-ensemble magnétique tel que décrit ci-dessus.The present invention finds particular application in the field of electrical circuit breakers, incorporating a magnetic subassembly as described above.

D'autres caractéristiques et avantages ressortiront également de la description détaillée, donnée ci-après à titre d'exemple non limitatif, en référence aux dessins annexés, dans lesquels :

  • la figure 1 est une vue éclatée d'un exemple de réalisation d'un sous-ensemble magnétique conforme à l'invention,
  • la figure 2 est une vue en coupe d'un exemple de réalisation d'un sous-ensemble magnétique conforme à l'invention,
  • la figure 3 est une vue en éclaté d'un autre exemple de réalisation d'un sous-ensemble magnétique conforme à l'invention,
  • la figure 4 est un détail de la figure 3,
  • la figure 5 représente le sous-ensemble magnétique de la figure 3 une fois assemblé,
  • la figure 6 est un autre exemple de réalisation d'un sous-ensemble magnétique conforme à l'invention,
  • la figure 7 est une vue en coupe d'un autre exemple de réalisation, d'un sous-ensemble magnétique conforme à l'invention,
  • la figure 8 représente un disjoncteur incorporant un sous-ensemble magnétique conforme à l'invention.
Other features and advantages will also emerge from the detailed description given hereinafter by way of non-limiting example, with reference to the appended drawings, in which:
  • FIG. 1 is an exploded view of an exemplary embodiment of a magnetic subassembly according to the invention,
  • FIG. 2 is a sectional view of an exemplary embodiment of a magnetic subassembly according to the invention,
  • FIG. 3 is an exploded view of another embodiment of a magnetic subassembly according to the invention,
  • FIG. 4 is a detail of FIG. 3,
  • FIG. 5 represents the magnetic subassembly of FIG. 3 once assembled,
  • FIG. 6 is another embodiment of a magnetic subassembly according to the invention,
  • FIG. 7 is a sectional view of another exemplary embodiment of a magnetic subassembly according to the invention,
  • FIG. 8 represents a circuit breaker incorporating a magnetic subassembly according to the invention.

Le sous-ensemble magnétique représenté par exemple à la figure 1 comporte une culasse magnétique (1) réalisée par exemple en un matériau magnétique ainsi qu'une bobine d'induction (2) destinée à être montée longitudinalement dans la culasse (1).The magnetic subassembly shown for example in Figure 1 comprises a magnetic yoke (1) made for example of a magnetic material and an induction coil (2) to be mounted longitudinally in the cylinder head (1).

La culasse (1) permet de canaliser au moins en partie les lignes de champ magnétique générées par un courant électrique traversant la bobine d'induction (2).The yoke (1) can channel at least in part the magnetic field lines generated by an electric current flowing through the induction coil (2).

Selon un autre exemple de réalisation, la culasse (1) peut être amagnétique.According to another embodiment, the yoke (1) can be non-magnetic.

Le sous-ensemble magnétique comporte également un noyau magnétique mobile (3) réalisé avec un matériau magnétique, par exemple de l'acier. Le noyau (3) présente une forme sensiblement cylindrique et deux faces polaires (4) et (5).The magnetic subassembly also comprises a movable magnetic core (3) made of a magnetic material, for example steel. The core (3) has a substantially cylindrical shape and two polar faces (4) and (5).

Un percuteur (6), se déplaçant avec le noyau mobile (3), est également prévu et permet d'ouvrir un contact électrique lorsqu'il se déplace d'une position inactive vers une position active.A striker (6), moving with the movable core (3), is also provided and makes it possible to open an electrical contact when it moves from an inactive position to an active position.

Un moyen de rappel élastique est prévu de manière à être sollicité par le déplacement du percuteur (6). Ainsi, lorsque la circulation du courant électrique dans la bobine d'induction (2) est interrompue, le moyen de rappel élastique (7a, 7b) ramène automatiquement le percuteur (6) dans sa position inactive et le contact électrique peut à nouveau être fermé.An elastic return means is provided so as to be biased by the movement of the striker (6). Thus, when the flow of electric current in the induction coil (2) is interrupted, the elastic return means (7a, 7b) automatically returns the striker (6) to its inactive position and the electrical contact can again be closed .

Un contact fixe (8), auquel est reliée une première extrémité (2a) de la bobine d'induction (2), est solidaire ou fait partie intégrante de la culasse (1). Une pastille de contact (9) est avantageusement rapportée sur le contact fixe (8).A fixed contact (8), to which is connected a first end (2a) of the induction coil (2), is integral or integral with the cylinder head (1). A contact pad (9) is advantageously attached to the fixed contact (8).

Une borne (10) de connexion au sous-ensemble magnétique à laquelle est reliée la seconde extrémité (2b) de la bobine (2) est également prévue.A connection terminal (10) to the magnetic subassembly to which the second end (2b) of the coil (2) is connected is also provided.

Le sous-ensemble magnétique représenté à la figure (2) présente un entrefer (11) réalisé entre la face polaire (5) du noyau mobile (3) et une face interne (12) de la culasse (1), lesquelles sont en regard l'une (5) de l'autre (12). Une partie de la culasse (1), en regard de la face polaire (5) du noyau magnétique mobile (3) constitue alors un noyau magnétique fixe.The magnetic subassembly shown in FIG. (2) has an air gap (11) formed between the polar face (5) of the movable core (3) and an internal face (12) of the cylinder head (1), which are opposite one (5) of the other (12). Part of the yoke (1), facing the polar face (5) of the movable magnetic core (3) then constitutes a fixed magnetic core.

L'entrefer (11) est dans ce mode de réalisation dépourvu d'un noyau magnétique fixe et se trouve déporté au moins partiellement à l'extérieur de la bobine magnétique (2).In this embodiment, the gap (11) is devoid of a fixed magnetic core and is at least partially offset outside the magnetic coil (2).

Le noyau mobile (3) est également simplifié dans sa forme, laquelle est par exemple cylindrique.The movable core (3) is also simplified in its shape, which is for example cylindrical.

La borne de connexion (10) se prolonge avantageusement par une partie magnétique (10a) s'étendant le long de la bobine (2) et permettant de canaliser en partie les lignes de champ magnétique générées par la bobine d'induction (2). La culasse (1) de même que la partie magnétique (10a) délimitent ainsi un logement dans lequel est insérée la bobine magnétique (2).The connection terminal (10) is advantageously extended by a magnetic part (10a) extending along the coil (2) and making it possible to partially channel the magnetic field lines generated by the induction coil (2). The yoke (1) as well as the magnetic part (10a) thus delimit a housing in which is inserted the magnetic coil (2).

Selon l'exemple de réalisation représenté à la figure 7, le sous-ensemble magnétique comprend un noyau magnétique fixe (3a), solidaire de la culasse (1) et traversé par le percuteur (6). L'entrefer (11) est localisé entre les faces polaires en regard l'une de l'autre, du noyau mobile (3) et du noyau fixe (3a). L'entrefer (11) s'étend alors dans le volume intérieur délimité par la bobine magnétique (2). Le noyau fixe (3a) est fixé sur la culasse (1) par tout moyen connu, et notamment par un montage en force ou par soudure.According to the embodiment shown in Figure 7, the magnetic subassembly comprises a fixed magnetic core (3a) integral with the yoke (1) and traversed by the striker (6). The gap (11) is located between the polar faces facing each other, the movable core (3) and the fixed core (3a). The gap (11) then extends into the interior volume delimited by the magnetic coil (2). The fixed core (3a) is fixed on the yoke (1) by any known means, and in particular by a mounting force or welding.

Le noyau mobile (3) est logé dans un support mobile (13) entraîné par ledit noyau mobile (3) et solidaire du percuteur (6). On obtient ainsi un sous-ensemble mécanique mobile, déplacé par la circulation d'une surintensité dans la bobine d'induction (2). Les dimensions du noyau mobile (3) et de l'entrefer (11) sont choisies en fonction de la force d'arrachage nécessaire pour permettre au percuteur (6) d'ouvrir un contact électrique. Le déplacement du percuteur (6) permet d'arracher un contact mobile (8a) s'appuyant sur la pastille de contact (9) et d'interrompre la circulation d'un courant électrique dans la bobine d'induction (2). Le moyen de rappel élastique permet, dès l'interruption de la circulation de courant électrique dans la bobine d'induction (2), de ramener le sous-ensemble mécanique mobile, à savoir le noyau mobile (3), le support mobile (13) et le percuteur (6) dans sa position inactive.The movable core (3) is housed in a mobile support (13) driven by said movable core (3) and integral with the striker (6). A mobile mechanical subassembly is thus obtained, displaced by the circulation of an overcurrent in the induction coil (2). The dimensions of the movable core (3) and the gap (11) are chosen according to the tearing force necessary to allow the firing pin (6) to open an electrical contact. The movement of the striker (6) makes it possible to tear off a movable contact (8a) resting on the contact pad (9) and to interrupt the flow of an electric current in the induction coil (2). The elastic return means makes it possible, as soon as the flow of electric current in the induction coil (2) is interrupted, to bring back the subassembly mobile mechanics, namely the movable core (3), the movable support (13) and the striker (6) in its inactive position.

Avantageusement le support mobile (13) et le percuteur (6) sont réalisés en une seule pièce, par exemple en matière plastique ou tout autre matériau isolant électrique. Le support mobile (13) est une pièce cylindrique se terminant à l'une de ses extrémités par une tige constituant le percuteur (6). La fabrication d'un tel support mobile (13) par injection est donc particulièrement simple et ses dimensions sont choisies de manière à le solidariser avec le noyau mobile (3) par une simple opération d'emmanchement. D'autres moyens techniques connus du type collage peuvent également être prévus pour solidariser le noyau mobile (3) avec le support mobile (13).Advantageously, the mobile support (13) and the striker (6) are made in one piece, for example plastic or any other electrical insulating material. The movable support (13) is a cylindrical piece terminating at one of its ends by a rod constituting the striker (6). The manufacture of such a mobile support (13) by injection is particularly simple and its dimensions are chosen so as to secure it with the movable core (3) by a simple fitting operation. Other known technical means of the bonding type may also be provided for securing the movable core (3) with the movable support (13).

Le moyen de rappel élastique est monté entre le support mobile (13) et la culasse magnétique (1). Ce moyen de rappel élastique est par exemple constitué d'une lame flexible (7a) présentant des ouvertures susceptibles d'être traversées par des plots de positionnement (1a) présents en nombre plus ou moins important sur la culasse (1).The elastic return means is mounted between the movable support (13) and the magnetic yoke (1). This elastic return means is for example constituted by a flexible blade (7a) having openings that can be traversed by positioning studs (1a) present in more or less significant number on the yoke (1).

Dans l'exemple de réalisation représenté par exemple à la figure 2 ou 7, il apparaît clairement que le percuteur (6) traverse une ouverture (1 b) ménagée dans la culasse (1). Cette ouverture (1b) constitue un moyen de guidage en translation du percuteur (6) et indirectement un moyen de guidage du sous-ensemble mécanique mobile, ce dernier n'étant relié à la culasse (1) via le moyen de rappel élastique. Dans l'exemple de réalisation représenté à la figure 7, le noyau fixe (3a) est engagé dans l'ouverture (1 b), constitue une pièce de guidage pour le percuteur (6).In the embodiment shown for example in Figure 2 or 7, it is clear that the striker (6) through an opening (1b) formed in the cylinder head (1). This opening (1b) constitutes a guide means in translation of the firing pin (6) and indirectly a guide means of the mobile mechanical subassembly, the latter being connected to the yoke (1) via the elastic return means. In the embodiment shown in Figure 7, the fixed core (3a) is engaged in the opening (1b), constitutes a guide piece for the striker (6).

La bobine d'induction (2) présente avantageusement des spires disjointes. Compte tenu du fait que la face polaire (5) est relativement importante et qu'elle ne comporte ni décrochement, ni chanfrein, ni lamage susceptibles d'altérer les lignes de champ magnétique, la réduction du nombre de spires entourant le noyau mobile (3) permet de maintenir, voire d'améliorer, les performances du sous-ensemble magnétique.The induction coil (2) advantageously has disjoint turns. In view of the fact that the polar face (5) is relatively large and that it comprises no recess, chamfer or countersink likely to alter the magnetic field lines, reducing the number of turns surrounding the mobile core (3 ) makes it possible to maintain or even improve the performance of the magnetic subassembly.

En outre, la séparation ou l'absence de contact entre des spires adjacentes permet de supprimer tout revêtement du type émail isolant électrique sur les spires.In addition, the separation or the absence of contact between adjacent turns eliminates any coating of the enamel type electrical insulation on the turns.

Les extrémités (2a) et (2b) de la bobine d'induction (2) s'écartent tangentiellement des spires de la bobine (2). Toute opération de pliage desdites extrémités (2a, 2b) est supprimée. On obtient ainsi à plus d'un titre, une réduction du prix de revient d'une telle bobine d'induction (2).The ends (2a) and (2b) of the induction coil (2) depart tangentially from the turns of the coil (2). Any folding operation of said ends (2a, 2b) is suppressed. This gives in more than one way, a reduction in the cost of such an induction coil (2).

Le moyen de rappel élastique peut également être constitué comme le montre par exemple les figures 3 à 5, d'une lamelle élastique (7b) solidaire du support mobile (13). Cette lamelle élastique (7b) s'étend par exemple à l'extérieur du cylindre constitutif du support mobile (13) sous forme de couronne périphérique. Cette dernière prend alors appui sur une face latérale (1a) de la culasse (1). Lors du déplacement du support mobile (13), la lamelle élastique (7b) se déforme et reprend ensuite sa forme initiale dès l'interruption du courant électrique circulant dans la bobine d'induction (2), ramenant dans sa position inactive le percuteur (6).The elastic return means may also be constituted as shown for example in Figures 3 to 5, an elastic strip (7b) integral with the movable support (13). This elastic strip (7b) extends for example outside the cylinder constituting the movable support (13) in the form of a peripheral ring. The latter then bears on a side face (1a) of the yoke (1). During the displacement of the mobile support (13), the elastic strip (7b) deforms and then resumes its initial shape as soon as the electric current flowing in the induction coil (2) is interrupted, bringing the striker back into its idle position ( 6).

Selon un autre exemple de réalisation du sous-ensemble magnétique conforme à l'invention, représenté par exemple à la figure (6), le moyen de rappel élastique est constitué d'une rondelle élastique (7c) positionnée dans l'entrefer (11). La rondelle élastique (7c) prend appui sur la face (12) interne de la culasse (1) et sur l'une des extrémités du support mobile (13). Lors du déplacement du support mobile (13), la rondelle élastique (7c) est comprimée. Dès l'interruption de la circulation du courant électrique dans la bobine d'induction (2), cette rondelle élastique (7c) réalisée par exemple, en matière plastique ou métallique, ou en mousse, reprend sa forme initiale et ramène le support mobile (13) dans sa position de repos correspondant à la position inactive du percuteur (6).According to another exemplary embodiment of the magnetic subassembly according to the invention, represented for example in FIG. 6, the resilient return means consists of an elastic washer (7c) positioned in the gap (11). . The spring washer (7c) is supported on the inner face (12) of the yoke (1) and on one end of the movable support (13). During the displacement of the movable support (13), the spring washer (7c) is compressed. As soon as the flow of electric current in the induction coil (2) is interrupted, this elastic washer (7c) made for example of plastic or metal material, or of foam, resumes its initial shape and brings back the mobile support ( 13) in its rest position corresponding to the inactive position of the striker (6).

Dans un autre exemple de réalisation, la culasse (1) est amagnétique et aucun noyau magnétique fixe n'est rapporté sur ladite culasse (1). Le déplacement du noyau mobile 3 est obtenu par une zone de localisation donnée d'une densité maximale de lignes de champ magnétique, et vers laquelle il est entraîné. Un tel déplacement suffit à actionner le percuteur (6).In another embodiment, the yoke (1) is non-magnetic and no fixed magnetic core is attached to said yoke (1). The displacement of the mobile core 3 is obtained by a given location area of a maximum density of magnetic field lines, and to which it is driven. Such a displacement suffices to actuate the firing pin (6).

La figure 8 représente une vue partiellement découpée, à des fins de clarté, d'un disjoncteur (15) conforme à l'invention. Le disjoncteur (15) incorporant un sous-ensemble magnétique conforme à l'invention, comporte un boîtier modulaire (16) pourvu de moyens de fixation (17), par exemple sur un support du type rail de montage (non représenté).Figure 8 shows a partially cut-away view, for the sake of clarity, of a circuit breaker (15) according to the invention. The circuit breaker (15) incorporating a magnetic subassembly according to the invention comprises a modular housing (16) provided with fixing means (17), for example on a support of the mounting rail type (not shown).

Le disjoncteur (15) présente un organe d'actionnement de type manette basculante (18), permettant de déplacer le contact mobile (8a) entre une position d'ouverture et de fermeture (cf. figure 8) de la liaison électrique avec le contact fixe (8).The circuit breaker (15) has a rocker-type operating member (18) for moving the movable contact (8a) between an open and closed position (see FIG. 8) of the electrical connection with the contact. fixed (8).

En cas de surintensité, le percuteur (6) agit sur une serrure mécanique (19) connue en tant que telle, laquelle déplace le contact mobile (8a) pour ouvrir la liaison électrique avec le contact fixe (8). Cette ouverture entraîne l'interruption de la circulation d'un courant électrique entre les bornes de connexion (10) du disjoncteur et ramène automatiquement la manette (18) dans la position correspondant à la séparation des contacts fixe (8) et mobile (8a), et ce grâce à la serrure mécanique (19).In case of overcurrent, the striker (6) acts on a mechanical lock (19) known as such, which moves the movable contact (8a) to open the electrical connection with the fixed contact (8). This opening causes the interruption of the circulation of an electric current between the terminals of connection (10) of the circuit breaker and automatically returns the handle (18) to the position corresponding to the separation of the fixed contacts (8) and movable (8a), thanks to the mechanical lock (19).

La serrure mécanique (19) peut être actionnée pour interrompre la circulation de courant soit par le percuteur (6), soit par un bilame de déclenchement thermique incorporé dans le disjoncteur (15) (non représenté aux figures).The mechanical lock (19) can be actuated to interrupt the flow of current either by the firing pin (6) or by a thermal trip bimetallic incorporated in the circuit breaker (15) (not shown in the figures).

Claims (15)

  1. Magnetic sub-unit for modular electrical apparatus of the circuit breaker type, comprising:
    - an induction coil (2),
    - a movable magnetic core (3),
    - a striker (6) which moves with the movable core (3),
    - an elastic return means biased by the displacement of the striker (6),
    characterised in that the movable core (3) is housed in a movable support (13) driven by the movable core (3) and joined to the striker (6).
  2. Magnetic sub-unit as claimed in claim 1, characterised in that the movable support (13) and the striker (6) are made as a single piece.
  3. Magnetic sub-unit as claimed in claim 2, characterised in that the movable support (13) is a cylindrical piece terminating at one of its ends in a rod constituting the striker (6).
  4. Magnetic sub-unit as claimed in claim 2 or 3, characterised in that the movable support (13) is made from plastic material.
  5. Magnetic sub-unit as claimed in one of claims 1 to 4, characterised in that it has a means for guiding the striker (6) in translation.
  6. Magnetic sub-unit as claimed in claim 5, characterised in that the guide means has an orifice (1b) formed in a yoke (1) through which the striker (6) extends.
  7. Magnetic sub-unit as claimed in claim 5, characterised in that the guide means has an orifice (1b) formed in a fixed core (3a) through which the striker (6) extends.
  8. Magnetic sub-unit as claimed in claims 6 and 7, characterised in that the fixed core (3a) is joined to the yoke (1).
  9. Magnetic sub-unit as claimed in claim 8 or 6, characterised in that the yoke (1) is made from a magnetic material constituting a fixed complementary magnetic element.
  10. Magnetic sub-unit as claimed in claim 9, characterised in that a part of the yoke (1) facing a polar face (5) of the movable magnetic core (3) constitutes the fixed complementary magnetic element.
  11. Magnetic sub-unit as claimed in any one of claims 1 to 10, characterised in that the elastic return means (7a, 7b, 7c) is mounted between the movable support (13) and the magnetic yoke (1).
  12. Magnetic sub-unit as claimed in claim 11, characterised in that the elastic return means is provided in the form of a flexible blade (7a).
  13. Magnetic sub-unit as claimed in any one of claims 1 to 12, characterised in that the induction coil (2) is a coil with disjointed turns.
  14. Magnetic sub-unit as claimed in any one of claims 1 to 13, characterised in that the ends (2a, 2b) of the induction coil (2) space the turns of the induction coil (2) tangentially apart.
  15. Electric circuit breaker comprising:
    - a fixed contact (8) to which the first end (2a) of the coil (2) is connected,
    - a connection terminal (10) to the sub-unit, to which the second end (2b) of the coil (2) is connected,
    - a magnetic sub-unit in accordance with any one of claims 1 to 14.
EP04360055A 2003-07-22 2004-05-28 Improved magnetic sub-unit and circuit breaker comprising this sub-unit Expired - Lifetime EP1501112B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200430099T SI1501112T1 (en) 2003-07-22 2004-05-28 Improved magnetic sub-unit and circuit breaker comprising this sub-unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0308949A FR2858106B1 (en) 2003-07-22 2003-07-22 IMPROVED MAGNETIC SUBASSEMBLY AND CIRCUIT BREAKER HAVING SUCH A MAGNETIC SUBASSEMBLY
FR0308949 2003-07-22

Publications (2)

Publication Number Publication Date
EP1501112A1 EP1501112A1 (en) 2005-01-26
EP1501112B1 true EP1501112B1 (en) 2006-08-09

Family

ID=33484684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04360055A Expired - Lifetime EP1501112B1 (en) 2003-07-22 2004-05-28 Improved magnetic sub-unit and circuit breaker comprising this sub-unit

Country Status (8)

Country Link
EP (1) EP1501112B1 (en)
CN (1) CN1320580C (en)
AT (1) ATE336076T1 (en)
BR (1) BRPI0402801A (en)
DE (1) DE602004001817T2 (en)
ES (1) ES2271824T3 (en)
FR (1) FR2858106B1 (en)
SI (1) SI1501112T1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009021771A1 (en) 2009-05-18 2010-11-25 Abb Ag Electromagnetic release and switching device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676860B1 (en) * 1991-05-21 1994-06-17 Merlin Gerin ELECTROMAGNETIC TRIGGER FOR A LOW CALIBER ELECTRIC CIRCUIT BREAKER.
US5343178A (en) * 1993-07-09 1994-08-30 Circuit Breaker Industries Limited Electric circuit breaker
FR2779567B1 (en) * 1998-06-03 2000-07-13 Hager Electro OPTIMIZED MAGNETIC SUB-ASSEMBLY
DE19845476B4 (en) * 1998-10-02 2004-08-12 Aeg Niederspannungstechnik Gmbh & Co Kg Magnetic system for miniature circuit breakers
DE10126854A1 (en) * 2001-06-01 2002-12-19 Siemens Ag Magnetic yoke for electromagnetic trip of switching device has magnetic core cooperating with trip coil formed in one piece with base body of magnetic yoke

Also Published As

Publication number Publication date
ATE336076T1 (en) 2006-09-15
FR2858106A1 (en) 2005-01-28
EP1501112A1 (en) 2005-01-26
SI1501112T1 (en) 2007-02-28
DE602004001817D1 (en) 2006-09-21
ES2271824T3 (en) 2007-04-16
DE602004001817T2 (en) 2007-08-16
FR2858106B1 (en) 2005-09-23
CN1320580C (en) 2007-06-06
CN1577687A (en) 2005-02-09
BRPI0402801A (en) 2005-05-24

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