EP2077571B1 - Electromagnetic contactor - Google Patents

Electromagnetic contactor Download PDF

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Publication number
EP2077571B1
EP2077571B1 EP20080166526 EP08166526A EP2077571B1 EP 2077571 B1 EP2077571 B1 EP 2077571B1 EP 20080166526 EP20080166526 EP 20080166526 EP 08166526 A EP08166526 A EP 08166526A EP 2077571 B1 EP2077571 B1 EP 2077571B1
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EP
European Patent Office
Prior art keywords
coil
rim
magnetic circuit
winding
contactor according
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EP20080166526
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German (de)
French (fr)
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EP2077571A1 (en
Inventor
Alain Portier
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.)
ABB France SAS
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ABB France SAS
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Publication of EP2077571A1 publication Critical patent/EP2077571A1/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
    • 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

Definitions

  • the present invention relates to an electromagnetic contactor.
  • An electromagnetic contactor has the main function of closing and opening a circuit according to the presence of a control voltage.
  • the means for withstanding the voltage dips may be constituted by an energy buffer system mounted at the terminals of the contactor coil.
  • this system increases the complexity and the cost of the contactor.
  • the document DE 18 16 320 discloses an electromagnetic contactor according to the preamble of claim 1.
  • the technical problem underlying the invention is therefore to provide a contactor for obtaining a resistance during recesses or voltage interruptions improved manner regardless of the size of the contactor while maintaining a simple structure of contactor, without oversizing its magnetic circuit.
  • the subject of the present invention is a contactor of the aforementioned type, characterized in that the means for holding the troughs or interruptions of tension comprise a rim extending, starting from the wall, around the opening, so that this flange is external to the axial passage defined by the winding of the coil.
  • the passage surface of the flow between the fixed part and the movable part is increased at the edge, the latter being opposite the moving part.
  • the permeance in the closed state of the magnetic circuit is increased, without encroaching on the winding zone situated opposite the moving part and without requiring oversizing of the magnetic circuit.
  • the rim extends, from the wall, around the opening, towards the interior of the housing.
  • the internal dimensions of the winding of the coil are greater than the dimensions of the passage section delimited by the flange.
  • the internal dimensions of the winding of the coil are smaller than the external dimensions of the flange.
  • the contactor comprises a carcass for carrying out the winding of the coil around it, the carcass comprising a housing for receiving the rim.
  • the carcass comprises a wall separating the flange of the axial passage in which the moving part moves.
  • the flange consists of a single piece with the lid.
  • the rim is constituted by a separate element of the lid.
  • the moving part of the magnetic circuit is subjected to a surface protection treatment that does not produce non-magnetic deposit at the point of contact between the fixed part and the mobile part of the magnetic circuit.
  • the surface treatment is a phosphating treatment.
  • Phosphating treatment for example with zinc and / or iron, makes it possible to obtain sufficient protection and maximum permeance.
  • an electromagnetic contactor according to the invention comprises a not shown insulating housing intended to be fixed on a support.
  • a movable contact holder 5 is integrally mounted with the movable portion 4 of the magnetic circuit.
  • the contact carrier 5 comprises movable contacts intended to be in contact with fixed contacts, or separated from these fixed contacts, according to the position of the mobile part 4 to close or open an electrical power circuit.
  • Elastic means in the form of a spring 6 make it possible to return the mobile part 4 to its rest position when the coil 2 is not powered.
  • the fixed part 3 of the magnetic circuit comprises a body 8 comprising a cylindrical portion and a bottom at one end of the cylindrical portion.
  • the body thus forms an open cavity forming a housing in which the coil 2 is received.
  • the fixed part 3 of the magnetic circuit also comprises a cover 9 intended to partially close the housing, forming a wall in which is formed a through opening 7 allowing the passage of the movable portion 4 of the magnetic circuit.
  • the body 8 comprises, in withdrawal from the edge of the cavity, a shoulder 10 making it possible to place the edge of the cover 9.
  • the movable portion 4 has a cylindrical shape whose diameter allows it to enter the passage opening 7 and to move in an axial passage 12 around which is formed the winding of the coil 2.
  • This winding of the coil extends between a first end 2a close to the passage opening 7 and a second end 2b remote from the passage opening 7.
  • the axial passage is delimited longitudinally by two end sections S1, S2 corresponding at both ends 2a, 2b of the winding.
  • a flange 13 is formed from the cover 9, around the opening 7 formed towards the inside of the housing formed in the fixed part 3.
  • This flange 13 extends, with respect to the inner surface of the cover 9, over a length ° L less than or equal to the distance D separating the winding from the inner surface of the cover 9.
  • the flange 13 is external to the axial passage delimited by the winding of the coil 2.
  • the flange 13 is constituted, in the embodiment shown, in one piece with the lid. According to one variant, the flange 13 is constituted by an element attached to the lid.
  • the inside diameter d1 of the winding of the coil is greater than the diameter d2 of the passage section delimited by the flange 13.
  • the inner diameter d1 of the winding of the coil is smaller than the outer diameter d3 of the flange 13.
  • the contactor comprises a carcass 14 making it possible to wind the coil 2 around it at a tubular portion delimiting by its wall the axial passage in which the mobile part 4 moves.
  • the carcass also comprises a housing 17 intended to receive the rim 13 of the opening 7.
  • the wall of the tubular portion separates the flange 13 from the axial passage 12 which it delimits, making it possible to avoid direct contact between the moving part 4 and the fixed part 3 of the armature at the rim 13.
  • the axial passage 12 has a diameter d4 smaller than the diameter d2 of the passage section delimited by the rim 13.
  • the fixed parts 3 and mobile 4 have tapered portions 18, 19 facing each other.
  • the fixed portion 3 comprises a convex conical portion 18, disposed on the bottom of the body 8.
  • the movable portion has a concave conical portion 19.
  • the concave portion could be positioned on the fixed portion and the convex portion on the moving part.
  • the two conical portions 18, 19 are of a shape adapted to provide an air gap between them when both fixed and moving parts are in contact.
  • the flat end ends of the two conical parts do not come into contact when the fixed and moving parts are in contact.
  • the points of contact are between the mobile part 4 and the fixed part 3 between an annular end portion 20 of the movable part and the bottom of the body of the fixed part.
  • the surface treatment is a phosphating treatment with zinc and / or iron.

Description

La présente invention concerne un contacteur électromagnétique.The present invention relates to an electromagnetic contactor.

Un contacteur électromagnétique a pour fonction principale de fermer et ouvrir un circuit en fonction de la présence d'une tension de commande.An electromagnetic contactor has the main function of closing and opening a circuit according to the presence of a control voltage.

Généralement il est souhaitable d'ouvrir rapidement le circuit en l'absence de tension.Generally it is desirable to quickly open the circuit in the absence of voltage.

Cependant la présence de réseaux perturbés dans certains pays ainsi que certaines normes environnementales demandent une tenue minimale lors de creux ou d'interruptions de tension. Il est communément demandé que le contacteur supporte l'absence de tension de commande pendant l'équivalent d'un cycle de tension alternative avant d'ouvrir le circuit.However, the presence of disturbed networks in some countries as well as certain environmental standards require a minimum hold during troughs or interruptions of voltage. It is commonly requested that the contactor supports the absence of control voltage during the equivalent of an AC voltage cycle before opening the circuit.

Il est connu à cet effet de réaliser un contacteur électromagnétique du type comportant :

  • une bobine de génération d'un champ magnétique,
  • un circuit magnétique comportant une partie fixe par rapport à la bobine et une partie mobile par rapport à la bobine sous l'action du champ magnétique délivrée par celle-ci,
    la bobine formant un enroulement autour d'un passage axial dans lequel se déplace la partie mobile du circuit magnétique, le passage axial étant délimité longitudinalement par les deux extrémités de l'enroulement de la bobine,
    la partie fixe du circuit magnétique comprenant un logement dans lequel est reçue l'enroulement de la bobine, ce logement étant délimité au moins partiellement par une paroi comprenant une ouverture permettant le passage de la partie mobile du circuit magnétique, et
    le contacteur comprenant en outre des moyens de tenue aux creux ou aux interruptions de tension.
It is known for this purpose to produce an electromagnetic contactor of the type comprising:
  • a coil for generating a magnetic field,
  • a magnetic circuit comprising a fixed part with respect to the coil and a part movable with respect to the coil under the action of the magnetic field delivered by it,
    the coil forming a winding around an axial passage in which the moving part of the magnetic circuit moves, the axial passage being delimited longitudinally by the two ends of the winding of the coil,
    the fixed part of the magnetic circuit comprising a housing in which the winding of the coil is received, this housing being delimited at least partially by a wall comprising an opening allowing the passage of the movable part of the magnetic circuit, and
    the contactor further comprising means for holding the troughs or interruptions of voltage.

Les moyens de tenue aux creux de tension peuvent être constitués par un système de tampon d'énergie se montant aux bornes de la bobine du contacteur. Toutefois ce système augmente la complexité et le coût du contacteur.The means for withstanding the voltage dips may be constituted by an energy buffer system mounted at the terminals of the contactor coil. However, this system increases the complexity and the cost of the contactor.

Le document DE 18 16 320 décrit un contacteur électromagnétique selon le préambule de la revendication 1.The document DE 18 16 320 discloses an electromagnetic contactor according to the preamble of claim 1.

Dans le cas de contacteurs dont l'alimentation est pilotée par une carte électronique agissant en hacheur comme par exemple celle décrite dans le document EP0789378 , il est possible, lorsque le contacteur est fermé et le courant dans la bobine est maintenu par une diode de roue libre pendant les interruptions de tension, que la propriété de tenue d'un cycle de tension alternative soit obtenue naturellement selon les caractéristiques du circuit magnétique et de la bobine pour des appareils de calibres moyens ou grands.In the case of contactors whose power is controlled by an electronic card acting as a chopper such as that described in the document EP0789378 it is possible, when the contactor is closed and the current in the coil is maintained by a freewheeling diode during voltage interruptions, that the holding property of a voltage cycle alternative is obtained naturally according to the characteristics of the magnetic circuit and the coil for medium or large size devices.

Toutefois, pour des appareils de plus petit calibre, cette propriété n'est pas naturellement obtenue par l'effet de la diode de roue libre car le rapport L/R de l'ensemble circuit magnétique / bobine à l'état fermé est d'une valeur trop faible.However, for devices of smaller size, this property is not naturally obtained by the effect of the freewheeling diode because the L / R ratio of the magnetic circuit / coil assembly in the closed state is a value too low.

Le problème technique à la base de l'invention est donc de fournir un contacteur permettant d'obtenir une tenue lors de creux ou d'interruptions de tension de façon améliorée quelle que soit la taille du contacteur tout en conservant une structure simple de contacteur, sans surdimensionner son circuit magnétique.The technical problem underlying the invention is therefore to provide a contactor for obtaining a resistance during recesses or voltage interruptions improved manner regardless of the size of the contactor while maintaining a simple structure of contactor, without oversizing its magnetic circuit.

A cet effet, la présente invention a pour objet un contacteur du type précité, caractérisé en ce que les moyens de tenue aux creux ou aux interruptions de tension comprennent un rebord s'étendant, à partir de la paroi, autour de l'ouverture, de façon à ce que ce rebord soit extérieur au passage axial délimité par l'enroulement de la bobine.For this purpose, the subject of the present invention is a contactor of the aforementioned type, characterized in that the means for holding the troughs or interruptions of tension comprise a rim extending, starting from the wall, around the opening, so that this flange is external to the axial passage defined by the winding of the coil.

Grâce aux dispositions selon l'invention, la surface de passage du flux entre la partie fixe et la partie mobile est augmentée au niveau du rebord, celui-ci étant en regard de la partie mobile. Ainsi la perméance à l'état fermé du circuit magnétique est augmentée, sans empiéter sur la zone de bobinage située en regard de la partie mobile et sans nécessiter de surdimensionnement du circuit magnétique.Thanks to the arrangements according to the invention, the passage surface of the flow between the fixed part and the movable part is increased at the edge, the latter being opposite the moving part. Thus the permeance in the closed state of the magnetic circuit is increased, without encroaching on the winding zone situated opposite the moving part and without requiring oversizing of the magnetic circuit.

Avantageusement, le rebord s'étend, à partir de la paroi, autour de l'ouverture, vers l'intérieur du logement.Advantageously, the rim extends, from the wall, around the opening, towards the interior of the housing.

Ces dispositions permettent de limiter l'encombrement du contacteur.Avantageusement, les dimensions intérieures de l'enroulement de la bobine sont supérieures aux dimensions de la section de passage délimitée par le rebord.These arrangements make it possible to limit the size of the contactor. Advantageously, the internal dimensions of the winding of the coil are greater than the dimensions of the passage section delimited by the flange.

Selon un mode de réalisation, les dimensions intérieures de l'enroulement de la bobine sont inférieures aux dimensions externes du rebord.According to one embodiment, the internal dimensions of the winding of the coil are smaller than the external dimensions of the flange.

Avantageusement, le contacteur comprend une carcasse permettant de réaliser l'enroulement de la bobine autour de celle-ci, la carcasse comprenant un logement destiné à recevoir le rebord.Advantageously, the contactor comprises a carcass for carrying out the winding of the coil around it, the carcass comprising a housing for receiving the rim.

Ces dispositions permettent de tirer profit de l'épaisseur de carcasse présente pour permettre l'introduction guidée du fil de bobinage, au dessus de l'enroulement. Ainsi, la présence du rebord n'implique pas de diminuer la hauteur de l'enroulement, ni d'augmenter la hauteur de l'ensemble constitué par la carcasse, l'enroulement de la bobine, et la partie fixe du circuit magnétique.These arrangements make it possible to take advantage of the thickness of the carcass present to allow the guided introduction of the winding wire, above the winding. Thus, the presence of the edge does not imply to reduce the height of the winding, nor to increase the height of the assembly constituted by the carcass, the winding of the coil, and the fixed part of the magnetic circuit.

Avantageusement, la carcasse comprend une paroi séparant le rebord du passage axial dans lequel se déplace la partie mobile.Advantageously, the carcass comprises a wall separating the flange of the axial passage in which the moving part moves.

Avantageusement, la partie fixe du circuit magnétique comprend :

  • un corps dans lequel est ménagée une cavité ouverte formant le logement de la bobine, et
  • un couvercle destiné à fermer partiellement le logement, dans lequel est ménagé l'ouverture de passage de la partie mobile du circuit magnétique,
le corps comprenant en retrait du bord de la cavité un épaulement permettant de poser le bord du couvercle.Advantageously, the fixed part of the magnetic circuit comprises:
  • a body in which is formed an open cavity forming the housing of the coil, and
  • a cover for partially closing the housing, in which is formed the passage opening of the movable portion of the magnetic circuit,
the body comprising recessed from the edge of the cavity a shoulder for placing the edge of the lid.

Selon une possibilité, le rebord est constitué d'une seule pièce avec le couvercle.According to one possibility, the flange consists of a single piece with the lid.

Selon une autre possibilité, le rebord est constitué par un élément distinct du couvercle.According to another possibility, the rim is constituted by a separate element of the lid.

Grâce à ces dispositions, par le simple échange du couvercle il est donc possible de fournir deux versions du contacteur : une version à retombée rapide avec un couvercle ne comprenant pas de rebord, et une version à tenue aux creux ou interruptions de tension comprenant un couvercle avec un rebord sans augmentation d'encombrement et sans surcoût important.Thanks to these provisions, by the simple exchange of the cover it is therefore possible to provide two versions of the contactor: a quick-release version with a cover not including a flange, and a version with resistance to the hollows or interruptions of voltage comprising a cover with a rim without increasing congestion and without significant additional cost.

Avantageusement, la partie mobile du circuit magnétique est soumise à un traitement de protection en surface ne produisant pas de dépôt amagnétique au point de contact entre la partie fixe et la partie mobile du circuit magnétique.Advantageously, the moving part of the magnetic circuit is subjected to a surface protection treatment that does not produce non-magnetic deposit at the point of contact between the fixed part and the mobile part of the magnetic circuit.

Ces dispositions permettent d'éviter l'addition d'un entrefer parasite lié au traitement de surface, et permettent d'améliorer la tenue aux creux et aux interruptions de courant.These provisions make it possible to avoid the addition of a parasitic air gap related to the surface treatment, and make it possible to improve the resistance to troughs and interruptions of current.

Avantageusement, le traitement de surface est un traitement par phosphatation.Advantageously, the surface treatment is a phosphating treatment.

Un traitement par phosphatation, par exemple au Zinc et/ou Fer permet d'obtenir une protection suffisante et une perméance maximale.Phosphating treatment, for example with zinc and / or iron, makes it possible to obtain sufficient protection and maximum permeance.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé, représentant à titre d'exemple non limitatif, un mode de réalisation d'un contacteur selon l'invention.

  • La figure 1 est une vue en perspective partielle d'un contacteur selon l'invention.
  • La figure 2 est une vue partielle en coupe du contacteur de figure 1.
  • La figure 3 est une vue de détail à échelle agrandie de la figure 2.
  • La figure 4 est une seconde vue de détail à échelle agrandie de la figure 2.
In any case, the invention will be better understood with the aid of the description which follows, with reference to the attached schematic drawing, representing by way of nonlimiting example, an embodiment of a contactor according to the invention.
  • The figure 1 is a partial perspective view of a contactor according to the invention.
  • The figure 2 is a partial sectional view of the contactor figure 1 .
  • The figure 3 is an enlarged detail view of the figure 2 .
  • The figure 4 is a second enlarged detail view of the figure 2 .

Selon un mode de réalisation représenté sur les figures 1 à 3, un contacteur électromagnétique selon l'invention comporte un boîtier isolant non représenté destinée à être fixé sur un support.According to an embodiment shown on the Figures 1 to 3 , an electromagnetic contactor according to the invention comprises a not shown insulating housing intended to be fixed on a support.

Le boîtier forme un logement dans lequel sont reçus :

  • une bobine de génération 2 d'un champ magnétique, et
  • un circuit magnétique comportant une partie fixe 3 par rapport à la bobine et une partie mobile 4 par rapport à la bobine 2 sous l'action du champ magnétique délivrée par celle-ci.
The housing forms a housing in which are received:
  • a generation coil 2 of a magnetic field, and
  • a magnetic circuit comprising a fixed part 3 with respect to the coil and a movable part 4 with respect to the coil 2 under the action of the magnetic field delivered by it.

De façon connue, un porte contact mobile 5 est monté solidairement avec la partie mobile 4 du circuit magnétique. Le porte contact 5 comprend des contacts mobiles destiné à être au contact de contacts fixes, ou séparés de ces contacts fixes, suivant la position de la partie mobile 4 pour fermer ou ouvrir un circuit électrique de puissance. Des moyens élastiques sous forme d'un ressort 6 permettent de ramener la partie mobile 4 à sa position de repos lorsque la bobine 2 n'est pas alimentée.In known manner, a movable contact holder 5 is integrally mounted with the movable portion 4 of the magnetic circuit. The contact carrier 5 comprises movable contacts intended to be in contact with fixed contacts, or separated from these fixed contacts, according to the position of the mobile part 4 to close or open an electrical power circuit. Elastic means in the form of a spring 6 make it possible to return the mobile part 4 to its rest position when the coil 2 is not powered.

La partie fixe 3 du circuit magnétique comprend un corps 8 comportant une portion cylindrique et un fond à une extrémité de la portion cylindrique. Le corps forme ainsi une cavité ouverte formant un logement dans lequel est reçue la bobine 2.The fixed part 3 of the magnetic circuit comprises a body 8 comprising a cylindrical portion and a bottom at one end of the cylindrical portion. The body thus forms an open cavity forming a housing in which the coil 2 is received.

La partie fixe 3 du circuit magnétique comprend également un couvercle 9 destiné à fermer partiellement le logement, formant une paroi dans laquelle est ménagée une ouverture de passage 7 permettant le passage de la partie mobile 4 du circuit magnétique.The fixed part 3 of the magnetic circuit also comprises a cover 9 intended to partially close the housing, forming a wall in which is formed a through opening 7 allowing the passage of the movable portion 4 of the magnetic circuit.

Le corps 8 comprend en retrait du bord de la cavité un épaulement 10 permettant de poser le bord du couvercle 9.The body 8 comprises, in withdrawal from the edge of the cavity, a shoulder 10 making it possible to place the edge of the cover 9.

La partie mobile 4 présente une forme cylindrique dont le diamètre lui permet de rentrer dans l'ouverture de passage 7 et de se déplacer dans un passage axial 12 autour duquel est formé l'enroulement de la bobine 2. Cet enroulement de la bobine s'étend entre une première extrémité 2a proche de l'ouverture de passage 7 et une seconde extrémité 2b éloignée de l'ouverture de passage 7. Le passage axial est délimité longitudinalement par deux sections d'extrémité S1, S2 correspondant aux deux extrémités 2a, 2b de l'enroulement.The movable portion 4 has a cylindrical shape whose diameter allows it to enter the passage opening 7 and to move in an axial passage 12 around which is formed the winding of the coil 2. This winding of the coil extends between a first end 2a close to the passage opening 7 and a second end 2b remote from the passage opening 7. The axial passage is delimited longitudinally by two end sections S1, S2 corresponding at both ends 2a, 2b of the winding.

Selon une caractéristique de l'invention, un rebord 13 est formé à partir du couvercle 9, autour de l'ouverture 7 formé vers l'intérieur du logement ménagé dans la partie fixe 3.According to a characteristic of the invention, a flange 13 is formed from the cover 9, around the opening 7 formed towards the inside of the housing formed in the fixed part 3.

Ce rebord 13 s'étend, par rapport à la surface intérieure du couvercle 9, sur une longueur°L inférieure ou égale à la distance D séparant l'enroulement de la surface intérieure du couvercle 9.This flange 13 extends, with respect to the inner surface of the cover 9, over a length ° L less than or equal to the distance D separating the winding from the inner surface of the cover 9.

Ainsi, le rebord 13 est extérieur au passage axial délimité par l'enroulement de la bobine 2.Thus, the flange 13 is external to the axial passage delimited by the winding of the coil 2.

Le rebord 13 est constitué, dans le mode de réalisation représenté, d'une seule pièce avec le couvercle. Selon une variante, le rebord 13 est constitué par un élément rapporté sur le couvercle.The flange 13 is constituted, in the embodiment shown, in one piece with the lid. According to one variant, the flange 13 is constituted by an element attached to the lid.

Le diamètre intérieur d1 de l'enroulement de la bobine est supérieur au diamètre d2 de la section de passage délimitée par le rebord 13.The inside diameter d1 of the winding of the coil is greater than the diameter d2 of the passage section delimited by the flange 13.

Le diamètre intérieur d1 de l'enroulement de la bobine est inférieur au diamètre externe d3 du rebord 13.The inner diameter d1 of the winding of the coil is smaller than the outer diameter d3 of the flange 13.

Le contacteur comprend une carcasse 14 permettant de réaliser l'enroulement de la bobine 2 autour de celle-ci au niveau d'une portion tubulaire 15 délimitant par sa paroi le passage axial 12 dans lequel se déplace la partie mobile 4.The contactor comprises a carcass 14 making it possible to wind the coil 2 around it at a tubular portion delimiting by its wall the axial passage in which the mobile part 4 moves.

La carcasse comprend également un logement 17 destiné à recevoir le rebord 13 de l'ouverture 7. La paroi de la portion tubulaire sépare le rebord 13 du passage axial 12 qu'elle délimite, permettant d'éviter un contact direct entre la partie mobile 4 et la partie fixe 3 de l'armature au niveau du rebord 13. Le passage axial 12 présente un diamètre d4 inférieur au diamètre d2 de la section de passage délimitée par le rebord 13.The carcass also comprises a housing 17 intended to receive the rim 13 of the opening 7. The wall of the tubular portion separates the flange 13 from the axial passage 12 which it delimits, making it possible to avoid direct contact between the moving part 4 and the fixed part 3 of the armature at the rim 13. The axial passage 12 has a diameter d4 smaller than the diameter d2 of the passage section delimited by the rim 13.

Les parties fixe 3 et mobile 4 présentent des portions coniques 18, 19 en regard. En particulier, la partie fixe 3 comprend une portion conique convexe 18, disposée sur le fond du corps 8. La partie mobile présente une portion conique concave 19. Bien entendu la portion concave pourrait être positionnée sur la partie fixe et la portion convexe sur la partie mobile.The fixed parts 3 and mobile 4 have tapered portions 18, 19 facing each other. In particular, the fixed portion 3 comprises a convex conical portion 18, disposed on the bottom of the body 8. The movable portion has a concave conical portion 19. Of course the concave portion could be positioned on the fixed portion and the convex portion on the moving part.

Les deux portions coniques 18, 19 sont d'une forme adaptée pour ménager un entrefer entre elles lorsque les deux parties fixe et mobile sont au contact. En particulier, les extrémités terminales planes, des deux parties coniques n'entrent pas en contact, lorsque les parties fixe et mobile sont en contact. Les points de contacts sont entre la partie mobile 4 et la partie fixe 3 entre une portion annulaire d'extrémité 20 de la partie mobile et le fond du corps de la partie fixe.The two conical portions 18, 19 are of a shape adapted to provide an air gap between them when both fixed and moving parts are in contact. In particular, the flat end ends of the two conical parts do not come into contact when the fixed and moving parts are in contact. The points of contact are between the mobile part 4 and the fixed part 3 between an annular end portion 20 of the movable part and the bottom of the body of the fixed part.

Au niveau de ces points de contact, les dépôts amagnétiques sont évités par un traitement de protection en surface. En particulier, le traitement de surface est un traitement par phosphatation au Zinc et/ou au Fer.At these contact points, non-magnetic deposits are avoided by surface protection treatment. In particular, the surface treatment is a phosphating treatment with zinc and / or iron.

Comme il va de soi, l'invention ne se limite pas à la forme de réalisation préférentielle décrite ci-dessus, à titre d'exemple non limitatif ; elle en embrasse au contraire toutes les variantes définies par les revendications.It goes without saying that the invention is not limited to the preferred embodiment described above, by way of non-limiting example; it encompasses all the variants defined by the claims.

Claims (11)

  1. An electromagnetic contactor, including:
    - a coil (2) generating a magnetic field,
    - a magnetic circuit including a stationary part (3) with respect to the coil (2) and a moving part (4) with respect to the coil under the action of the magnetic field delivered by the latter,
    the coil (2) forming a winding around an axial passage (12) in which the moving part (4) of the magnetic circuit moves, the axial passage being longitudinally delimited by the two ends of the winding of the coil (2),
    the stationary part (3) of the magnetic circuit comprising a housing in which the winding of the coil is received, said housing being at least partially delimited by a wall comprising an opening (7) allowing the passage of the moving part (4) of the magnetic circuit,
    the contactor further comprising means for withstanding dips or voltage interruptions,
    characterized in that
    the means for withstanding dips or voltage interruptions comprise a rim (13) extending, from the wall, around the opening (7), such that said rim (13) is outside the axial passage delimited by the winding of the coil (2).
  2. The contactor according to claim 1, wherein the rim (13) extends, from the wall, around the opening (7), toward the inside of the housing.
  3. The contactor according to one of the preceding claims, wherein the inner dimensions (d1) of the winding of the coil (2) are larger than the dimensions (d2) of the passage section delimited by the rim (13).
  4. The contactor according to one of the preceding claims, wherein the inner dimensions (d1) of the winding of the coil (2) are smaller than the outer dimensions (d3) of the rim (13).
  5. The contactor according to one of the preceding claims, comprising a frame (14) making it possible to wind the coil (2) around it, the frame (14) comprising a housing (17) designed to receive the rim (13).
  6. The contactor according to claim 5, wherein the frame (14) comprises a wall separating the rim (13) from the axial passage (12) in which the moving part (4) moves.
  7. The contactor according to one of the preceding claims, wherein the stationary part (3) of the magnetic circuit comprises:
    - a body (8) in which an open cavity is arranged forming the housing for the coil (2), and
    - a lid (9) designed to partially close the housing, in which the passage opening (7) for the moving part (4) of the magnetic circuit is arranged,
    the body (8) comprising, withdrawn from the edge of the cavity, a shoulder (10) making it possible to place the edge of the lid (9).
  8. The contactor according to claim 7, wherein the rim (13) is made in a single piece with the lid (9).
  9. The contactor according to claim 7, wherein the rim (13) is made from an element separate from the lid (9).
  10. The contactor according to one of the preceding claims, wherein the moving part (4) of the magnetic circuit is subjected to a surface protective treatment not producing a non-magnetic deposit at the point of contact between the stationary part (3) and the moving part (4) of the magnetic circuit.
  11. The contactor according to claim 10, wherein the surface treatment is done by phosphatation.
EP20080166526 2008-01-07 2008-10-14 Electromagnetic contactor Active EP2077571B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0800070A FR2926160B1 (en) 2008-01-07 2008-01-07 ELECTROMAGNETIC CONTACTOR

Publications (2)

Publication Number Publication Date
EP2077571A1 EP2077571A1 (en) 2009-07-08
EP2077571B1 true EP2077571B1 (en) 2013-08-21

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Application Number Title Priority Date Filing Date
EP20080166526 Active EP2077571B1 (en) 2008-01-07 2008-10-14 Electromagnetic contactor

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EP (1) EP2077571B1 (en)
CN (2) CN201311886Y (en)
FR (1) FR2926160B1 (en)

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TWI480377B (en) * 2013-04-02 2015-04-11 Genereach Biotechnology Corp Methods for detecting Bacillus anthracis

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1816320A1 (en) * 1968-12-21 1970-07-09 Bosch Gmbh Robert Electromagnetic relay
US3575676A (en) * 1969-11-04 1971-04-20 Gen Electric High-speed, high-current solenoid
US4893101A (en) * 1988-10-21 1990-01-09 Ericson Manufacturing Company Resettable ground fault circuit interrupter
SE505747C2 (en) 1996-02-07 1997-10-06 Asea Brown Boveri Contactor

Also Published As

Publication number Publication date
FR2926160B1 (en) 2009-12-25
CN201311886Y (en) 2009-09-16
EP2077571A1 (en) 2009-07-08
CN101483119A (en) 2009-07-15
FR2926160A1 (en) 2009-07-10

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