EP2253049B1 - Machine comprising a device for preventing the establishment of an electric arc between two conductive elements - Google Patents

Machine comprising a device for preventing the establishment of an electric arc between two conductive elements Download PDF

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Publication number
EP2253049B1
EP2253049B1 EP09727855.0A EP09727855A EP2253049B1 EP 2253049 B1 EP2253049 B1 EP 2253049B1 EP 09727855 A EP09727855 A EP 09727855A EP 2253049 B1 EP2253049 B1 EP 2253049B1
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EP
European Patent Office
Prior art keywords
machine
partition wall
conductive elements
electric arc
adjacent portions
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EP09727855.0A
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German (de)
French (fr)
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EP2253049A2 (en
Inventor
Denis Payan
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Centre National dEtudes Spatiales CNES
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Centre National dEtudes Spatiales CNES
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Publication of EP2253049A2 publication Critical patent/EP2253049A2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/46—Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing
    • H01R39/50—Barriers placed between brushes

Definitions

  • the present invention relates to a machine comprising a device for preventing the establishment of an electric arc between two conductive elements facing each other.
  • the invention finds particular application in electrical or electronic components, such as connectors, implemented in a space environment or in conditions reproducing such an environment. However, it should be understood that the invention applies generally to electrical or electronic components to be implemented in any environment where an electric arc is likely to form between two conductive elements facing.
  • conductive elements may be, for example, connector plugs of a plug-in male connector in a female connector or printed circuit tracks
  • Such connectors may, for example, be of the type described in the patent applications CH 182180 A , FR-2 068 660 , US2006 / 0046568 and US-2003/0008542 , and in the patent U.S. 3,746,817 .
  • the male connectors may comprise plug-in conductive elements arranged opposite, in particular parallel to each other, which are separated by gaps. These plug-in elements have in common to present a stripped conductive portion which projects relative to a surface of the body of the male connector.
  • the plug-in conductor elements such as wires or pins of the male connector, are engaged in housings housed in a female connector body.
  • DE 20 2005 017012 describes an electrical connector placed on one side of a printed circuit.
  • the cover thus comprises at least one dividing wall of dielectric material interposed between two conductors.
  • a precursor phenomenon (filament, dust, ESD or electrostatic discharge, high voltage, etc.) is likely to generate between the stripped portions of two conductive elements a local plasma.
  • the latter while relaxing, will make the medium conductive and establish a short circuit between the two conductive elements.
  • an intense electric field can be the cause of the generation of such a plasma.
  • the invention therefore aims to prevent the formation of these arcs between two electrically conductive elements.
  • the invention relates to a machine according to claim 1 comprising a device for preventing the establishment of an electric arc between adjacent parts devoid of or likely to be free of electrical insulation of at least two electrically conductive elements, as well as an electrical component incorporating such a device, as defined by the claims.
  • the device according to the invention avoids the formation of arcing between the conductive elements opposite. Indeed, the dimensions of the dividing wall of dielectric material impose an electric arc that could be formed to follow a path such that the arc is unstable and can not be established between the two conductive elements.
  • the invention also protects the conductive elements from contact during handling and can thus prevent electrostatic discharges of human origin.
  • FIG. figure 1 shows a connector body 1 3 having housings 5 formed from its surface 11.
  • the connector body 1 which is illustrated in FIG. figure 1 is not equipped with the device visible on the figure 2 .
  • the housings 5 are adapted to accommodate conductive elements 7 such as pins or conductive son.
  • the conductive elements 7 consist of a conductive core 8 which is surrounded by an electrically insulating sheath 10, except at one of their ends which terminates in a stripped portion 9 intended to be received in a housing 5.
  • the bare portions 9 of the conductive elements 7 are fixed in the housing 5 by any means known to those skilled in the art, for example by welding.
  • the stripped portions 9 of the core 8 of the conductive elements 7 do not penetrate fully into the recesses 5 and each have a conductive portion projecting from a surface 11 of the body 1 of the connector 3.
  • the figure 2 shows the connector body 1 equipped with a separating partition 13 in the form of a plate or rectangular blade, made of a dielectric material, protrudes from the surface 11 of the body 1 halfway between the two conducting elements 7.
  • the partition wall 13 is fixed by its edge on the surface 11 of the body 1, or integral with it.
  • the dielectric separating partition 13 has a height h with respect to the surface 11 of the body 1.
  • the height h is at least equal to the length of the stripped portion plus a length of overhang which is at least equal to half the distance between the two conductive elements 7.
  • the plane P1 extending between the end of the sheath 10 where the conductive stripped portion 9 of one of the two elements 7 begins and the upper edge E of the partition wall 13 which is opposite the surface 11 of the body 1 forms with this surface 11 an angle ⁇ of at least 30 °.
  • the separating partition 13 prevents the establishment of an electric arc between the two stripped portions 9 of the cores of the electrical elements 7, since it imposes on the electric arc that might be formed between these stripped portions to follow a path whose radius of curvature makes this arc unstable.
  • the separating partition 13 is made of ceramic to guarantee a service life in accordance with the requirements of the standards in force, particularly in the field of the manufacture of connectors for space use.
  • the figure 4 shows a separating partition, which is disposed between two conductive elements of a component illustrated in FIG. figure 3 , such as a microprocessor, a memory card or other.
  • Component 15 differs from the connector shown in FIGS. Figures 1 and 2 in that it comprises a body 17 having a face 19 on which plug-in conductive connection elements 21, such as pins, project uniformly distributed in parallel with each other. These conductive elements 21 are intended to be received and fixed by welding or by interlocking in housings of a support device (not shown) such as a printed circuit or the like. According to this example, a separating partition 23, made of a dielectric material, is arranged between two adjacent conductive elements 21.
  • the partition walls 23 are all identical to each other. They preferably have dimensions such that at any point on their periphery they project, with respect to a line joining any point of the stripped portion of a conducting element 21 and the nearest point of the stripped portion of an adjacent conductive element, of a height h at least equal to half the distance between these two points.
  • the separating pieces 23 are attached to the surface of the body 17 of the connector 15.
  • the separating pieces 23 could also be integral with the body 17 of the connector 15.
  • FIGs 5 and 6 illustrate another example not forming part of the invention.
  • the figure 5 shows a male connector 25 and the figure 6 shows the female connector 27 associated with it.
  • the male connector 25 has plug-in connection conductor elements 29 such as pins which protrude from the surface 31 of a connector body 33 and are distributed on the surface 31 forming a grid.
  • the plug-in connection elements 29 are conductive pins each electrically connected inside the body 33 (by means not shown) to a sheathed electrical wire 36. To simplify the reading of the figure 5 , voluntarily all the feed son 36 have not been represented.
  • Conducting connecting elements 29 are adapted to be received in housings 35 formed in the female connector 27 illustrated in FIG. figure 6 .
  • the connector 25 comprises a separating partition 37 made of a dielectric material.
  • the separating partition 37 is in the form of a grid consisting of a first series of dielectric separation plates or plates 39 aligned in pairs transversely, on either side of a second series of dielectric plates or plates of separation 41 longitudinally aligned and perpendicular to the separating plates 39.
  • Each dielectric separation plate 39, 41 is disposed between two conductive elements 29 of the connector 25, so that none of the conductive elements 29 is directly opposite an adjacent conductive element 29.
  • the female connector 27 has terminals 47 (or pads) substantially of parallelepipedal shape, which project relative to a surface 45
  • the dimensions and the spatial arrangement of the terminals 47 are complementary to the dimensions and the arrangement of the spaces defined between the partition plates 39 and 41 of the dielectric partition 37 in the form of a grid. Thus, the terminals 47 can be easily introduced into said spaces.
  • the terminals 47 thus form rows in rows and in columns, and may each come opposite a conductive element 29 during the assembly of the male and female connectors 27.
  • the housings 35 in which the conductive elements 29 are inserted are formed in each of the terminals 47, near their center, and electrically connected in the body 45 (by means not shown) to the conductive wires 49 illustrated in FIG. figure 6 . Voluntarily, all the wires 49 have not been represented on the figure 6 to make it easier to read.
  • the height of the dielectric gate 37 with respect to the surface 31 is substantially equal to the height of the terminals 47.
  • the dimensions of the dielectric grid 37 are such that in every point it projects, with respect to a line joining any point of the stripped portion of a conductive element 29 and the nearest point of the stripped portion of a adjacent conductive element, of a height h at least equal to half the distance between these two points.
  • the figure 7 illustrates an embodiment according to the invention applied to a multi-electrode rotating system.
  • the figure 7 partially shows a rotary switch 51 of a machine 53 such as an electric motor or a solar generator drive mechanism.
  • Conductive elements 55 are in contact at one of their ends 57 with the contactor 51.
  • the conductive elements 55 are provided with insulating sheaths 59 which leave exposed a portion 61 of the conductive elements adjacent to their end 57.
  • separating partitions 63 made of a dielectric material are interposed between two conductive stripped portions 61 of the conductive elements facing each other.
  • the separating partitions 63 may be disks or blades forming an integral part of the contactor 51 or attached thereto, and rotating with it.
  • the dielectric separating partitions 63 completely isolate the bare portions of the adjacent conductive elements 55 from each other.
  • each separating partition 63 projects or projects beyond the stripped portions of the conductive elements 55 over a height which is at least equal to half the shortest distance separating the separating partition 63 from each of the stripped portions 61 of two adjacent conductive elements 55.
  • the protruding parts of the dielectric separating partitions 63 prevent the formation of an electric arc between the stripped parts of the conducting elements 55.
  • the partition walls 63 protrude radially from the side wall of the body 51, which makes it possible to prevent the formation of an arc whatever the position of the conductive elements 55 on the side wall of the body 51.
  • FIGS. 8 and 9 illustrate another example not forming part of the invention applied to electrical conductors which do not have a stripped portion at the beginning of their life, but which are used under conditions where the stresses are likely to reveal a risk of damage to the strand. their insulation, for example aging cracks or wear on an edge due to vibrations, which may cause the formation of an electric arc between two adjacent conductors.
  • the electrical conductors 67 comprise a conductive core 69 surrounded by an insulating sheath 71.
  • a system 73 separator conductors is constituted by a bottom 75 on which stand partitions 77, both made of dielectric material, and which define a set of parallel channels U section adapted to each receive a driver electric.
  • the separating partitions 77 each project or protrude beyond the conductive cores 69, which are likely to be more or less stripped locally by aging, by wear or accidentally for the reasons explained above, on a height which is preferably at least about half of the shortest distance separating a dividing wall 75 from each of the conductive cores 69 of two adjacent conductors 67.
  • such a height of the partitions 75 is adapted to impose an arc that could form a slope of at least about 30 ° relative to a direct path between conductive cores 69 which would be locally stripped for reasons indicated above.

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  • Connector Housings Or Holding Contact Members (AREA)
  • Insulators (AREA)

Description

La présente invention concerne une machine comprenant un dispositif pour prévenir l'établissement d'un arc électrique entre deux éléments conducteurs en regard.The present invention relates to a machine comprising a device for preventing the establishment of an electric arc between two conductive elements facing each other.

L'invention trouve une application particulière dans les composants électriques ou électroniques, tels que des connecteurs, mis en oeuvre dans un environnement spatial ou dans des conditions reproduisant un tel environnement. Il devra toutefois être compris que l'invention s'applique de manière générale aux composants électriques ou électroniques destinés à être mis en oeuvre dans tout environnement où un arc électrique est susceptible de se former entre deux éléments conducteurs en regard.The invention finds particular application in electrical or electronic components, such as connectors, implemented in a space environment or in conditions reproducing such an environment. However, it should be understood that the invention applies generally to electrical or electronic components to be implemented in any environment where an electric arc is likely to form between two conductive elements facing.

Les composants électriques ou électroniques utilisés dans un environnement spatial sont souvent détériorés à cause de la formation d'arcs électriques entre les éléments conducteurs qu'ils comportent. Ces éléments conducteurs peuvent être, par exemple, des fiches de connexion d'un connecteur mâle enfichables dans un connecteur femelle ou des pistes de circuits imprimésElectrical or electronic components used in a space environment are often deteriorated because of the arcing between the conductive elements they comprise. These conductive elements may be, for example, connector plugs of a plug-in male connector in a female connector or printed circuit tracks

De tels connecteurs peuvent, par exemple, être du type de ceux décrits dans les demandes de brevets CH 182180 A , FR-2 068 660 , US2006/0046568 et US-2003/0008542 , et dans le brevet US-3 746 817 .Such connectors may, for example, be of the type described in the patent applications CH 182180 A , FR-2 068 660 , US2006 / 0046568 and US-2003/0008542 , and in the patent U.S. 3,746,817 .

Comme le montrent ces documents, les connecteurs mâles peuvent comporter des éléments conducteurs enfichables disposés en regard, notamment parallèlement entre eux, qui sont séparés par des espaces. Ces éléments enfichables ont en commun de présenter une partie conductrice dénudée qui fait saillie par rapport à une surface du corps du connecteur mâle.As shown in these documents, the male connectors may comprise plug-in conductive elements arranged opposite, in particular parallel to each other, which are separated by gaps. These plug-in elements have in common to present a stripped conductive portion which projects relative to a surface of the body of the male connector.

Lors de la connexion du connecteur mâle avec le connecteur femelle, les éléments conducteurs enfichables, tels que des fils ou broches du connecteur mâle, sont engagés dans des logements d'accueil ménagés dans un corps de connecteur femelle.When connecting the male connector to the female connector, the plug-in conductor elements, such as wires or pins of the male connector, are engaged in housings housed in a female connector body.

Une fois la connexion réalisée, il peut arriver qu'une partie dénudée des éléments conducteurs reste en saillie par rapport à la surface du corps du connecteur mâle et/ou femelle. Même dans le cas d'un branchement soigneux, il existe bien souvent une petite partie dénudée de l'élément conducteur qui ne pénètre pas totalement dans le logement. Cette petite partie dénudée reste en vis-à-vis direct des autres parties dénudées des autres fils ou du connecteur lui-même, ce qui représente un risque de court-circuit si le milieu ambiant devient subitement conducteur (Ionisation de l'air, forte humidité, champ très intense, création d'un plasma dans le vide ...).Once the connection is made, it may happen that a stripped portion of the conductive elements remains protruding from the surface of the body the male and / or female connector. Even in the case of a careful connection, there is often a small stripped portion of the conductive element that does not fully penetrate the housing. This small stripped portion remains in direct contact with the other stripped parts of the other wires or the connector itself, which represents a risk of short circuit if the ambient environment suddenly becomes conductive (air ionization, strong humidity, very intense field, creation of a plasma in a vacuum ...).

Par ailleurs, DE 20 2005 017012 décrit un connecteur électrique placé sur une face d'un circuit imprimé. Un capot enfichable sur l'autre face du circuit imprimé, dans des rainures adaptées, vient délimitant des chambres dans le connecteur afin d'isoler des contacts électriques dépourvues d'isolant électrique. Le capot comporte ainsi au moins une cloison séparatrice en matériau diélectrique interposée entre deux conducteurs.Otherwise, DE 20 2005 017012 describes an electrical connector placed on one side of a printed circuit. A plug-in cover on the other side of the printed circuit, in adapted grooves, delimits chambers in the connector to isolate electrical contacts without electrical insulation. The cover thus comprises at least one dividing wall of dielectric material interposed between two conductors.

Dans un environnement terrien où l'air constitue un isolant dans des conditions normales de température et de pression, le problème d'éviter la formation d'arcs électriques entre les parties dénudées d'éléments conducteurs de connecteurs ne se pose généralement pas, l'air étant isolant, sauf dans le cas d'un champ électrique intense ou de conditions particulières d'humidité, par exemple.In a terrestrial environment where air constitutes an insulator under normal conditions of temperature and pressure, the problem of avoiding arcing between the stripped portions of conductive elements of connectors is not generally encountered. air being insulating, except in the case of an intense electric field or particular conditions of humidity, for example.

Dans un environnement spatial dépourvu d'atmosphère, un phénomène précurseur (filament, poussière, ESD ou décharge électrostatique, haute tension, etc.) est susceptible de générer entre les parties dénudées de deux éléments conducteurs un plasma local. Celui-ci, en se détendant, va rendre le milieu conducteur et établir un court-circuit entre les deux éléments conducteurs. Dans l'air, un champ électrique intense peut être la cause de la génération d'un tel plasma.In a space environment devoid of atmosphere, a precursor phenomenon (filament, dust, ESD or electrostatic discharge, high voltage, etc.) is likely to generate between the stripped portions of two conductive elements a local plasma. The latter, while relaxing, will make the medium conductive and establish a short circuit between the two conductive elements. In the air, an intense electric field can be the cause of the generation of such a plasma.

L'invention a donc pour objet d'empêcher la formation de ces arcs entre deux éléments électriquement conducteurs.The invention therefore aims to prevent the formation of these arcs between two electrically conductive elements.

A cet effet, l'invention concerne une machine selon la revendication 1 comprenant un dispositif pour prévenir l'établissement d'un arc électrique entre des parties adjacentes dépourvues ou susceptibles d'être dépourvues d'isolant électrique d'au moins deux éléments électriquement conducteurs, ainsi qu'un composant électrique intégrant un tel dispositif, tels que définis par les revendications.To this end, the invention relates to a machine according to claim 1 comprising a device for preventing the establishment of an electric arc between adjacent parts devoid of or likely to be free of electrical insulation of at least two electrically conductive elements, as well as an electrical component incorporating such a device, as defined by the claims.

Ainsi, le dispositif selon l'invention évite la formation d'arcs électriques entre les éléments conducteurs en regard. En effet, les dimensions de la cloison séparatrice en matériau diélectrique imposent à un arc électrique qui serait susceptible de se former de suivre un chemin tel que l'arc est instable et ne peut s'établir entre les deux éléments conducteurs.Thus, the device according to the invention avoids the formation of arcing between the conductive elements opposite. Indeed, the dimensions of the dividing wall of dielectric material impose an electric arc that could be formed to follow a path such that the arc is unstable and can not be established between the two conductive elements.

L'invention permet également de protéger les éléments conducteurs de tout contact lors de manipulation et peut ainsi prévenir des décharges électrostatiques d'origine humaine.The invention also protects the conductive elements from contact during handling and can thus prevent electrostatic discharges of human origin.

L'invention sera davantage comprise à la lumière de modes de réalisation qui vont maintenant être présentés en faisant référence aux figures annexées parmi lesquelles :

  • la figure 1 montre, de manière schématique et en coupe, deux éléments conducteurs d'un connecteur,
  • la figure 2 montre, de manière schématique et de coupe, une application ne faisant pas partie de l'invention aux deux éléments conducteurs du connecteur illustré à la figure 1,
  • la figure 3 est une vue partielle en perspective d'un connecteur équipé de contacts mâles,
  • la figure 4 est une vue partielle en perspective du connecteur de la figure 3 équipé d'un dispositif ne faisant pas partie de l'invention,
  • la figure 5 illustre un autre exemple ne faisant pas partie de l'invention appliqué à un connecteur mâle différent de celui illustré aux figures 1 ou 3, ledit dispositif et ledit connecteur étant représentés en perspective,
  • la figure 6 est une vue en perspective d'un connecteur femelle adapté pour être connecté au connecteur mâle illustré à la figure 5,
  • la figure 7 est une vue schématique en coupe partielle d'un mode de réalisation de la machine selon l'invention appliqué à un système tournant à électrodes multiples, et
  • les figures 8 et 9 sont des vues schématiques en perspective d'un système séparateur selon un autre mode de réalisation de l'invention.
The invention will be further understood in the light of embodiments which will now be presented with reference to the appended figures among which:
  • the figure 1 shows, schematically and in section, two conductive elements of a connector,
  • the figure 2 shows, schematically and in section, an application not forming part of the invention to the two conductive elements of the connector illustrated in FIG. figure 1 ,
  • the figure 3 is a partial perspective view of a connector equipped with male contacts,
  • the figure 4 is a partial perspective view of the connector of the figure 3 equipped with a device not forming part of the invention,
  • the figure 5 illustrates another example not forming part of the invention applied to a male connector different from that illustrated in FIGS. Figures 1 or 3 said device and said connector being shown in perspective,
  • the figure 6 is a perspective view of a female connector adapted to be connected to the male connector illustrated in FIG. figure 5 ,
  • the figure 7 is a schematic partial sectional view of an embodiment of the machine according to the invention applied to a multi-electrode rotating system, and
  • the Figures 8 and 9 are schematic perspective views of a separator system according to another embodiment of the invention.

Les figures 1 et 2 montrent un corps 1 de connecteur 3 présentant des logements 5 ménagés à partir de sa surface 11. Le corps 1 de connecteur 3 qui est illustré en figure 1 n'est pas équipé du dispositif visible sur la figure 2.The Figures 1 and 2 show a connector body 1 3 having housings 5 formed from its surface 11. The connector body 1 which is illustrated in FIG. figure 1 is not equipped with the device visible on the figure 2 .

Les logements 5 sont adaptés pour accueillir des éléments conducteurs 7 tels que des broches ou fils conducteurs. Les éléments conducteurs 7 sont constitués d'une âme conductrice 8 qui est entourée d'une gaine électriquement isolante 10, sauf à l'une de leurs extrémités qui se termine par une partie dénudée 9 destinée à être reçue dans un logement 5.The housings 5 are adapted to accommodate conductive elements 7 such as pins or conductive son. The conductive elements 7 consist of a conductive core 8 which is surrounded by an electrically insulating sheath 10, except at one of their ends which terminates in a stripped portion 9 intended to be received in a housing 5.

Deux logements 5 seulement sont représentés sur les figures 1 et 2. Il devra toutefois être compris que le corps 1 de connecteur 3 peut comporter plus de deux logements.Only two dwellings 5 are represented on the Figures 1 and 2 . It will however be understood that the body 1 of connector 3 may have more than two housings.

Les parties dénudées 9 des éléments conducteurs 7 sont fixées dans les logements 5 par tout moyen connu de l'homme de l'art, par exemple par soudure.The bare portions 9 of the conductive elements 7 are fixed in the housing 5 by any means known to those skilled in the art, for example by welding.

Comme illustrées aux figures 1 et 2, les parties dénudées 9 de l'âme 8 des éléments conducteurs 7 ne pénètrent pas totalement dans les logements 5 et présentent chacun une partie conductrice en saillie par rapport à une surface 11 du corps 1 du connecteur 3.As illustrated in Figures 1 and 2 , the stripped portions 9 of the core 8 of the conductive elements 7 do not penetrate fully into the recesses 5 and each have a conductive portion projecting from a surface 11 of the body 1 of the connector 3.

La figure 2 montre le corps 1 de connecteur équipé d'une cloison séparatrice 13 en forme de plaque ou lame rectangulaire, réalisée dans un matériau diélectrique, fait saillie à la surface 11 du corps 1 à mi-distance entre les deux éléments conducteurs 7. La cloison séparatrice 13 est fixée par sa tranche sur la surface 11 du corps 1, ou bien venue de matière avec celui-ci.The figure 2 shows the connector body 1 equipped with a separating partition 13 in the form of a plate or rectangular blade, made of a dielectric material, protrudes from the surface 11 of the body 1 halfway between the two conducting elements 7. The partition wall 13 is fixed by its edge on the surface 11 of the body 1, or integral with it.

Comme indiqué sur la figure 2, la cloison séparatrice diélectrique 13 présente une hauteur h par rapport à la surface 11 du corps 1.As indicated on the figure 2 the dielectric separating partition 13 has a height h with respect to the surface 11 of the body 1.

De préférence, la hauteur h est au moins égale à la longueur de la partie dénudée additionnée d'une longueur de débord qui est au moins égale à la moitié de la distance entre les deux éléments conducteurs 7. Ainsi, le plan P1 s'étendant entre l'extrémité de la gaine 10 où commence la partie dénudée conductrice 9 de l'un des deux éléments 7 et le bord supérieur E de la cloison séparatrice 13 qui est opposé à la surface 11 du corps 1 forme avec cette surface 11 un angle α d'au moins 30°.Preferably, the height h is at least equal to the length of the stripped portion plus a length of overhang which is at least equal to half the distance between the two conductive elements 7. Thus, the plane P1 extending between the end of the sheath 10 where the conductive stripped portion 9 of one of the two elements 7 begins and the upper edge E of the partition wall 13 which is opposite the surface 11 of the body 1 forms with this surface 11 an angle α of at least 30 °.

La cloison séparatrice 13 empêche l'établissement d'un arc électrique entre les deux parties dénudées 9 des âmes des éléments électriques 7, car elle impose à l'arc électrique qui serait susceptible de se former entre ces parties dénudées de suivre un trajet dont le rayon de courbure rend cet arc instable.The separating partition 13 prevents the establishment of an electric arc between the two stripped portions 9 of the cores of the electrical elements 7, since it imposes on the electric arc that might be formed between these stripped portions to follow a path whose radius of curvature makes this arc unstable.

De préférence, la cloison séparatrice 13 est réalisée en céramique pour lui garantir une durée de vie conforme aux exigences des normes en vigueur, notamment dans le domaine de la fabrication de connecteurs à usage spatial.Preferably, the separating partition 13 is made of ceramic to guarantee a service life in accordance with the requirements of the standards in force, particularly in the field of the manufacture of connectors for space use.

La figure 4 montre une cloison séparatrice, qui est disposée entre deux éléments conducteurs d'un composant 15 illustré à la figure 3, tel qu'un microprocesseur, une barrette mémoire ou autre.The figure 4 shows a separating partition, which is disposed between two conductive elements of a component illustrated in FIG. figure 3 , such as a microprocessor, a memory card or other.

Le composant 15 diffère du connecteur illustré aux figures 1 et 2 en ce qu'il comporte un corps 17 présentant une face 19 sur laquelle font saillie des éléments conducteurs de connexion enfichables 21, tels que des broches, répartis uniformément de façon parallèle entre eux. Ces éléments conducteurs 21 sont destinés à être reçus et fixés par soudure ou par emboîtement dans des logements d'un dispositif de support (non représenté) tel qu'un circuit imprimé ou autre. Selon cet exemple, une cloison séparatrice 23, réalisée dans un matériau diélectrique, est disposée entre deux éléments conducteurs 21 contigus.Component 15 differs from the connector shown in FIGS. Figures 1 and 2 in that it comprises a body 17 having a face 19 on which plug-in conductive connection elements 21, such as pins, project uniformly distributed in parallel with each other. These conductive elements 21 are intended to be received and fixed by welding or by interlocking in housings of a support device (not shown) such as a printed circuit or the like. According to this example, a separating partition 23, made of a dielectric material, is arranged between two adjacent conductive elements 21.

Les cloisons séparatrices 23 sont toutes identiques entre elles. Elles présentent de préférence des dimensions telles qu'en tout point de leur périphérie elles font saillie, par rapport à une ligne joignant un point quelconque de la partie dénudée d'un élément conducteur 21 et le point le plus proche de la partie dénudée d'un élément conducteur adjacent, d'une hauteur h au moins égale à la moitié de la distance entre ces deux points.The partition walls 23 are all identical to each other. They preferably have dimensions such that at any point on their periphery they project, with respect to a line joining any point of the stripped portion of a conducting element 21 and the nearest point of the stripped portion of an adjacent conductive element, of a height h at least equal to half the distance between these two points.

Dans le cadre de l'exemple illustré aux figures 3 et 4, les pièces de séparation 23 sont rapportées sur la surface du corps 17 du connecteur 15. Les pièces de séparation 23 pourraient également être venues de matière avec le corps 17 du connecteur 15.In the context of the example illustrated in Figures 3 and 4 , the separating pieces 23 are attached to the surface of the body 17 of the connector 15. The separating pieces 23 could also be integral with the body 17 of the connector 15.

Les figures 5 et 6 illustrent un autre exemple ne faisant pas partie de l'invention. La figure 5 montre un connecteur mâle 25 et la figure 6 montre le connecteur femelle 27 qui lui est associé.The Figures 5 and 6 illustrate another example not forming part of the invention. The figure 5 shows a male connector 25 and the figure 6 shows the female connector 27 associated with it.

Le connecteur mâle 25 présente des éléments conducteurs de connexion enfichables 29 tels que des broches qui font saillie de la surface 31 d'un corps 33 de connecteur et sont répartis sur la surface 31 en formant un quadrillage.The male connector 25 has plug-in connection conductor elements 29 such as pins which protrude from the surface 31 of a connector body 33 and are distributed on the surface 31 forming a grid.

Les éléments de connexion enfichables 29 sont des broches conductrices connectées chacune électriquement à l'intérieur du corps 33 (par des moyens non représentés) à un fil électrique gainé 36. Pour simplifier la lecture de la figure 5, volontairement tous les fils d'alimentation 36 n'ont pas été représentés.The plug-in connection elements 29 are conductive pins each electrically connected inside the body 33 (by means not shown) to a sheathed electrical wire 36. To simplify the reading of the figure 5 , voluntarily all the feed son 36 have not been represented.

Les éléments conducteurs de connexion 29 sont adaptés pour être reçus dans des logements 35 ménagés dans le connecteur femelle 27 illustré à la figure 6.Conducting connecting elements 29 are adapted to be received in housings 35 formed in the female connector 27 illustrated in FIG. figure 6 .

Conformément à cet exemple, le connecteur 25 comporte une cloison séparatrice 37 réalisée dans un matériau diélectrique. La cloison séparatrice 37 se présente sous la forme d'une grille constituée d'une première série de plaques ou lames diélectriques de séparation 39 alignées deux à deux transversalement, de part et d'autre d'une deuxième série de plaques ou lames diélectriques de séparation 41 alignées longitudinalement et perpendiculaires aux plaques de séparation 39.According to this example, the connector 25 comprises a separating partition 37 made of a dielectric material. The separating partition 37 is in the form of a grid consisting of a first series of dielectric separation plates or plates 39 aligned in pairs transversely, on either side of a second series of dielectric plates or plates of separation 41 longitudinally aligned and perpendicular to the separating plates 39.

Chaque plaque diélectrique de séparation 39, 41 est disposée entre deux éléments conducteurs 29 du connecteur 25, de sorte qu'aucun des éléments conducteurs 29 ne se trouve directement en regard d'un élément conducteur 29 adjacent.Each dielectric separation plate 39, 41 is disposed between two conductive elements 29 of the connector 25, so that none of the conductive elements 29 is directly opposite an adjacent conductive element 29.

Parallèlement, afin de recevoir les éléments conducteurs 29 du connecteur mâle 25, le connecteur femelle 27 présente des bornes 47 (ou plots) sensiblement de forme parallélépipédique, qui font saillies par rapport à une surface 45Meanwhile, in order to receive the conductive elements 29 of the male connector 25, the female connector 27 has terminals 47 (or pads) substantially of parallelepipedal shape, which project relative to a surface 45

Les dimensions et la disposition spatiale des bornes 47 sont complémentaires des dimensions et de la disposition des espaces définis entre les plaques de séparation 39 et 41 de la cloison séparatrice diélectrique 37 en forme de grille. Ainsi, les bornes 47 peuvent être aisément introduites dans lesdits espaces.The dimensions and the spatial arrangement of the terminals 47 are complementary to the dimensions and the arrangement of the spaces defined between the partition plates 39 and 41 of the dielectric partition 37 in the form of a grid. Thus, the terminals 47 can be easily introduced into said spaces.

Les bornes 47 forment ainsi des rangées en lignes et en colonnes, et peuvent venir chacune en regard d'un élément conducteur 29 lors de l'assemblage des connecteurs mâle 25 et femelle 27.The terminals 47 thus form rows in rows and in columns, and may each come opposite a conductive element 29 during the assembly of the male and female connectors 27.

Les logements 35 dans lesquels les éléments conducteurs 29 sont insérés sont réalisés dans chacune des bornes 47, au voisinage de leur centre, et connectés électriquement dans le corps 45 (par des moyens non représentés) à des fils conducteurs 49 illustrés à la figure 6. Volontairement, tous les fils 49 n'ont pas été représentés sur la figure 6 afin d'en faciliter la lecture.The housings 35 in which the conductive elements 29 are inserted are formed in each of the terminals 47, near their center, and electrically connected in the body 45 (by means not shown) to the conductive wires 49 illustrated in FIG. figure 6 . Voluntarily, all the wires 49 have not been represented on the figure 6 to make it easier to read.

La hauteur de la grille diélectrique 37 par rapport à la surface 31 est sensiblement égale à la hauteur des bornes 47.The height of the dielectric gate 37 with respect to the surface 31 is substantially equal to the height of the terminals 47.

Quand les éléments conducteurs 29 sont enfichés dans les logements 35 des bornes 47, ils présentent toujours une faible partie dénudée.qui n'est pas engagée dans le logement 35 correspondant. Ceci est en partie dû aux imprécisions de fabrication des connecteurs.When the conductive elements 29 are plugged into the housings 35 of the terminals 47, they always have a small stripped portion which is not engaged in the corresponding housing 35. This is partly due to manufacturing inaccuracies of the connectors.

Les dimensions de la grille diélectrique 37 sont telles qu'en tout point elle fait saillie, par rapport à une ligne joignant un point quelconque de la partie dénudée d'un élément conducteur 29 et le point le plus proche de la partie dénudée d'un élément conducteur adjacent, d'une hauteur h au moins égale à la moitié de la distance entre ces deux points.The dimensions of the dielectric grid 37 are such that in every point it projects, with respect to a line joining any point of the stripped portion of a conductive element 29 and the nearest point of the stripped portion of a adjacent conductive element, of a height h at least equal to half the distance between these two points.

La figure 7 illustre un mode de réalisation selon l'invention appliqué à un système tournant à électrodes multiples.The figure 7 illustrates an embodiment according to the invention applied to a multi-electrode rotating system.

La figure 7 montre partiellement un contacteur tournant 51 d'une machine 53 telle qu'un moteur électrique ou un mécanisme d'entraînement de générateur solaire.The figure 7 partially shows a rotary switch 51 of a machine 53 such as an electric motor or a solar generator drive mechanism.

Des éléments conducteurs 55 sont en contact à l'une de leurs extrémités 57 avec le contacteur 51.Conductive elements 55 are in contact at one of their ends 57 with the contactor 51.

Les éléments conducteurs 55 sont pourvus de gaines isolantes 59 qui laissent dénudée une partie 61 des éléments conducteurs adjacente à leur extrémité 57.The conductive elements 55 are provided with insulating sheaths 59 which leave exposed a portion 61 of the conductive elements adjacent to their end 57.

Conformément à l'invention, des cloisons séparatrices 63 réalisées dans un matériau diélectrique sont interposées entre deux parties dénudées conductrices 61 des éléments conducteurs en regard.According to the invention, separating partitions 63 made of a dielectric material are interposed between two conductive stripped portions 61 of the conductive elements facing each other.

Les cloisons séparatrices 63 peuvent être des disques ou des lames faisant partie intégrante du contacteur 51 ou rapportés sur celui-ci, et tournant avec lui.The separating partitions 63 may be disks or blades forming an integral part of the contactor 51 or attached thereto, and rotating with it.

De cette manière, les cloisons séparatrices diélectriques 63 isolent complètement les unes des autres les parties dénudées des éléments conducteurs adjacents 55.In this way, the dielectric separating partitions 63 completely isolate the bare portions of the adjacent conductive elements 55 from each other.

De préférence, chaque cloison séparatrice 63 fait saillie ou déborde au-delà des parties dénudées des éléments conducteurs 55 sur une hauteur qui est au moins égale à la moitié de la plus courte distance qui sépare la cloison séparatrice 63 de chacune des parties dénudées 61 de deux éléments conducteurs adjacents 55.Preferably, each separating partition 63 projects or projects beyond the stripped portions of the conductive elements 55 over a height which is at least equal to half the shortest distance separating the separating partition 63 from each of the stripped portions 61 of two adjacent conductive elements 55.

Ainsi, dans le cas d'un moteur électrique à collecteur ou à contact tournant, les parties en saillie des cloisons séparatrices diélectriques 63 empêchent la formation d'un arc électrique entre les parties dénudées des éléments conducteurs 55.Thus, in the case of a commutator or rotating contact electric motor, the protruding parts of the dielectric separating partitions 63 prevent the formation of an electric arc between the stripped parts of the conducting elements 55.

Dans le cas où le corps 51 présente une forme de cylindre plein, les cloisons séparatrices 63 font saillie radialement de la paroi latérale du corps 51, ce qui permet d'empêcher la formation d'un arc quelle que soit la position des éléments conducteurs 55 sur la paroi latérale du corps 51.In the case where the body 51 has a solid cylinder shape, the partition walls 63 protrude radially from the side wall of the body 51, which makes it possible to prevent the formation of an arc whatever the position of the conductive elements 55 on the side wall of the body 51.

Les figures 8 et 9 illustrent un autre exemple ne faisant pas partie de l'invention appliqué à des conducteurs électriques qui ne présentent pas de partie dénudée en début de vie, mais qui sont utilisés dans des conditions où les contraintes sont susceptibles de faire apparaitre un risque d'endommagement de leur isolant, par exemple des craquelures dues au vieillissement ou une usure contre un bord à cause de vibrations, susceptible d'entrainer la formation d'un arc électrique entre deux conducteurs adjacents.The Figures 8 and 9 illustrate another example not forming part of the invention applied to electrical conductors which do not have a stripped portion at the beginning of their life, but which are used under conditions where the stresses are likely to reveal a risk of damage to the strand. their insulation, for example aging cracks or wear on an edge due to vibrations, which may cause the formation of an electric arc between two adjacent conductors.

Les conducteurs électriques 67 comportent une âme conductrice 69 entourée d'une gaine isolante 71.The electrical conductors 67 comprise a conductive core 69 surrounded by an insulating sheath 71.

Conformément à cet exemple, un système 73 séparateur de conducteurs est constitué par un fond 75 sur lequel se dressent des cloisons séparatrices 77, tous deux en matériau diélectrique, et qui définissent un ensemble de goulottes parallèles à section en U adaptées pour recevoir chacune un conducteur électrique. Les cloisons séparatrices 77 font chacune saillie ou débordent au-delà des âmes conductrices 69, qui sont susceptibles d'être plus ou moins dénudées localement par vieillissement, par usure ou accidentellement pour les raisons expliquées ci-dessus, sur une hauteur qui est de préférence au moins égale à environ la moitié de la plus courte distance qui sépare une cloison séparatrice 75 de chacune des âmes conductrices 69 de deux conducteurs adjacents 67.According to this example, a system 73 separator conductors is constituted by a bottom 75 on which stand partitions 77, both made of dielectric material, and which define a set of parallel channels U section adapted to each receive a driver electric. The separating partitions 77 each project or protrude beyond the conductive cores 69, which are likely to be more or less stripped locally by aging, by wear or accidentally for the reasons explained above, on a height which is preferably at least about half of the shortest distance separating a dividing wall 75 from each of the conductive cores 69 of two adjacent conductors 67.

Une fois encore, une telle hauteur des cloisons 75 est adaptée pour imposer à un arc qui serait susceptible de se former une pente d'au moins environ 30° par rapport à un trajet direct entre des âmes conductrices 69 qui seraient localement dénudées pour les raisons indiquées ci-dessus.Once again, such a height of the partitions 75 is adapted to impose an arc that could form a slope of at least about 30 ° relative to a direct path between conductive cores 69 which would be locally stripped for reasons indicated above.

Claims (7)

  1. A machine (53) including:
    - at least two electrically conductive members (55),
    - a rotating contactor (51),
    characterized in that the rotating contactor (51) comprises a device for preventing the establishment of an electric arc between adjacent portions devoid of electrical insulators (61) of the electrically conductive members (55);
    the electrically conductive members (55) being disposed to protrude relative to a surface of the rotating contactor (51);
    in that said device for preventing the establishment of an electric arc comprises at least one partition wall (63) made of dielectric material interposed between said adjacent portions (61) of said conductive members (55), the dimensions of said partition wall (63) being adapted so that the shortest path between said adjacent portions (61), through bypassing said partition wall (63), corresponds to an instability threshold of an electric arc likely to be established between said adjacent portions;
    and in that said partition wall (63) is constituted of at least one plate extending from said surface of the rotating contactor (51) and has, perpendicularly to the shortest distance (d) which separates said wall of each of said adjacent portions (61) from said conductive members, a height (h) such that its projection beyond said adjacent portions (61) is at least equal to about half of said distance (d).
  2. The machine (53) according to claim 1, characterized in that said partition wall (63) is made of ceramic material.
  3. The machine (53) according to any one of the preceding claims, characterized in that said partition wall (63) is fastened on said surface.
  4. The machine (53) according to any one of claims 1 to 2, characterized in that said partition wall (63) forms an integral part of the contactor (51).
  5. The machine (53) according to any one of the preceding claims, characterized in that said plate (63) has substantially the shape of a disk.
  6. The machine (53) according to any one of the preceding claims, characterized in that the rotating contactor (51) has a solid cylinder-shaped body.
  7. The machine (53) according to any one of the preceding claims, characterized in that it is a motor or a solar generator drive mechanism.
EP09727855.0A 2008-03-14 2009-03-13 Machine comprising a device for preventing the establishment of an electric arc between two conductive elements Active EP2253049B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0851657A FR2928772B1 (en) 2008-03-14 2008-03-14 DEVICE FOR PREVENTING THE ESTABLISHMENT OF AN ELECTRIC ARC BETWEEN TWO CONDUCTIVE ELEMENTS.
PCT/FR2009/050420 WO2009122072A2 (en) 2008-03-14 2009-03-13 Device for preventing the establishment of an electric arc between two conductive elements

Publications (2)

Publication Number Publication Date
EP2253049A2 EP2253049A2 (en) 2010-11-24
EP2253049B1 true EP2253049B1 (en) 2018-08-15

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EP09727855.0A Active EP2253049B1 (en) 2008-03-14 2009-03-13 Machine comprising a device for preventing the establishment of an electric arc between two conductive elements

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US (1) US8933337B2 (en)
EP (1) EP2253049B1 (en)
FR (1) FR2928772B1 (en)
WO (1) WO2009122072A2 (en)

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FR2980921B1 (en) 2011-10-03 2013-10-11 Centre Nat Etd Spatiales ELECTRICAL MANIFOLD WITH MECHANICALLY INDEPENDENT INSULATION TUBULAR INSULATION SLEEVES.
US9385500B2 (en) * 2013-08-26 2016-07-05 FCI Asia Pte. Ltd. Electrical connector including fins
EP3454574A1 (en) * 2017-09-07 2019-03-13 Widex A/S A head-worn device having electrostatic discharge protection

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Also Published As

Publication number Publication date
US20110073349A1 (en) 2011-03-31
EP2253049A2 (en) 2010-11-24
FR2928772A1 (en) 2009-09-18
WO2009122072A2 (en) 2009-10-08
WO2009122072A3 (en) 2009-11-26
FR2928772B1 (en) 2014-06-13
US8933337B2 (en) 2015-01-13

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