EP1688968A1 - Helical electrical cable - Google Patents

Helical electrical cable Download PDF

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Publication number
EP1688968A1
EP1688968A1 EP05300095A EP05300095A EP1688968A1 EP 1688968 A1 EP1688968 A1 EP 1688968A1 EP 05300095 A EP05300095 A EP 05300095A EP 05300095 A EP05300095 A EP 05300095A EP 1688968 A1 EP1688968 A1 EP 1688968A1
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EP
European Patent Office
Prior art keywords
groups
group
helix
winding
pitch
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.)
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Application number
EP05300095A
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German (de)
French (fr)
Inventor
Jonathan Nevett
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.)
Nexans SA
Original Assignee
Nexans SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nexans SA filed Critical Nexans SA
Priority to EP05300095A priority Critical patent/EP1688968A1/en
Priority to US11/342,350 priority patent/US7663058B2/en
Priority to KR1020060010887A priority patent/KR101213771B1/en
Publication of EP1688968A1 publication Critical patent/EP1688968A1/en
Priority to US12/012,734 priority patent/US7497070B2/en
Priority to US12/288,849 priority patent/US8069644B2/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/02—Stranding-up
    • H01B13/04—Mutually positioning pairs or quads to reduce cross-talk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/06—Extensible conductors or cables, e.g. self-coiling cords
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/04—Cables with twisted pairs or quads with pairs or quads mutually positioned to reduce cross-talk
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2301/00—Controls
    • D07B2301/25—System input signals, e.g. set points
    • D07B2301/251—Twist
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2301/00—Controls
    • D07B2301/35—System output signals
    • D07B2301/3591—Linear speed

Definitions

  • the present invention relates to the field of helical electric cables.
  • An electrical cable comprises one or more groups of twisted wires.
  • a group is conventionally made of two twisted wires - in this case, we speak of pair - but can also include more than two wires twisted between them.
  • a helical electrical cable comprises several groups wound together to form a helix.
  • Crosstalk refers to the electromagnetic interference between groups belonging to the same electric cable.
  • the crosstalk phenomenon frequently poses a problem with data transmission.
  • US Patent 6,318,062 discloses a method for varying the twist pitch within a pair. This method also makes it possible to prevent conductive wires from being roughly parallel to one another along the cable by preventing the interweaving of conducting wires of a given group into conducting wires of the other groups.
  • the present invention relates to a helical electrical cable comprising at least two groups wound together so as to form a helix of groups, each group comprising at least two twisted wires.
  • the pitch of the group helix varies along the helical electric cable between two limit values of the same sign.
  • the main mechanism of coupling between the two pairs is the mutual inductance, which is a periodic function of the pairing steps and the wiring pitch that varies along the cable.
  • increased interference may occur between the signal conveyed by the transmitting pair and the crosstalk signal propagating in the opposite direction in the receiving pair; this phenomenon occurs at frequencies which are in arithmetic relation with the period of the periodic function mentioned above and the propagation velocity.
  • Some peaks in the crosstalk curves measured as a function of frequency have their origin in this mechanism, and the more the cable structure is regular and repetitive over a given length of cable, the more their amplitude and their width increase. As a result, the amplitudes of these peaks can be reduced by scrambling the cable geometry and according to the present invention this objective is accomplished by means of variations in the wiring pitch according to a determined or random function.
  • the helical electric cable according to the invention may comprise at least one additional group helix.
  • the helical electric cable according to the invention may comprise a single group helix.
  • Each group helix may comprise more than two groups.
  • the helical electrical cable may comprise a group helix comprising about ten coiled groups.
  • the group helix can strictly comprise two groups.
  • the helical electric cable according to the invention may comprise several group helices, each group helix comprising a different number of groups, or the same number of groups.
  • the groups of twisted wires may comprise more than two wires.
  • each group of conductive yarns strictly comprises two conductive yarns: this will be referred to as a twisted pair.
  • the conductive wires may be twisted together helically or alternately, so-called "SZ".
  • Groups can include the same number of leads, or a different number from one group to another.
  • the pitch of the group helix advantageously varies according to a periodic function, for example a sinusoidal function.
  • the pitch of the helix may for example vary randomly.
  • the present invention also relates to a method of manufacturing a helical electric cable according to the present invention.
  • the method comprises a step of winding the two groups so as to form a helix of groups.
  • the winding is carried out with a speed varying between two limit speeds of the same sign so that the pitch of the group helix varies along the cable between two limit values of the same sign.
  • the speed varying between the two limit speeds may be an angular winding speed of the two groups around a central line, the central line being in translation with a substantially constant linear speed.
  • the speed varying between the two limit speeds is a linear speed of a central line in translation, the two groups being wound around the central line with a substantially constant angular velocity.
  • Such a method makes it possible to avoid varying the winding angular speed, which can be advantageous particularly when the inertia of a winding device is relatively high.
  • the method according to the present invention can also be implemented without a physical central line, thus making it possible to manufacture a helical electric cable without a central line, whether the variable speed is an angular winding speed or a linear translational speed.
  • the present invention is not limited by the manner in which the manufacturing process is carried out.
  • the present invention is not limited by the nature of pitch variation means of the group helix.
  • the manufacturing device advantageously comprises means for measuring the stiffness of the central line at the input of the winding means, the measuring means being connected to the control means.
  • the stiffness measuring means allows better control of the pitch value of the group helix, but does not limit the present invention.
  • the present invention is of course not limited by the nature of the winding means.
  • the manufacturing device further comprises means for applying a binder at the outlet of the die, and two pulling tracks.
  • means for applying a binder at the outlet of the die, and two pulling tracks are not limiting.
  • Figure 1 shows an example of helical electrical cable according to an embodiment of the present invention.
  • Fig. 2 shows an example of a manufacturing device according to the preferred embodiment of the present invention.
  • the helical electric cable shown in FIG. 1 comprises four groups P1, P2, P3 and P4 wound together to form a helix of groups 1.
  • Each group Pi, i varying between 1 and 4 comprises two twisted conductive wires FCi1 and FCi2: we will talk about pairs.
  • the conductive wires FCi1 and FCi2 are twisted helically, and with a different pitch from one pair to another.
  • the pitch of a first pair P1 is thus smaller than the pitch of a second pair P2.
  • the helical electric cable may also comprise outer layers, not shown, which protect the propeller from groups 1.
  • the pitch of the group 1 propeller varies along the helical electric cable between two limit values.
  • the pitch of the group helix takes a first value L1, a second value L2 and then a third value L3.
  • the conducting wires of the different pairs P1, P2, P3 and P4 are thus only rarely parallel to each other, and over relatively short lengths.
  • FIG. 2 illustrates an example of a device for manufacturing such a cable.
  • the manufacturing device 11 comprises winding means 6 of two groups (18a, 18b) around a central line 9.
  • the central line 9 undergoes a translational movement between input tracks 2 and output tracks 3 .
  • Each group (18a, 18b) comprises several twisted conductive wires, for example copper wires.
  • the winding means 6 comprise coils (21 a, 21 b).
  • Each coil (21a, 21b) can carry a reserve of one of the groups (18a, 18b).
  • Unrepresented rotation means allow rotation of the coils (21a, 21b) around the center line 9. The two groups (18a, 18b) are thus wound to form a group helix 20.
  • the winding means 6 also comprise a distribution plate 5 comprising two peripheral openings (23a, 23b) and a central opening 24. Each peripheral opening (23a, 23b) receives one of the groups (21a, 21b). The central opening 24 receives the central line 9.
  • the winding means 6 may also comprise a die 4 at the outlet of the distribution plate 5.
  • means for applying a binder 3 make it possible to apply a binder to fix the position of the wound groups.
  • the winding of the groups (18a, 18b) around the central line 9 is performed with a substantially constant angular velocity, for example 50 revolutions per minute.
  • the linear speed of the central line 9 varies over time, at least at the level of the winding means 6, so that the group helix 20 has a pitch that varies along the helical electric cable thus produced. .
  • the linear speed of the central line 9 is substantially constant over the time upstream of the manufacturing device 11, and downstream of the manufacturing device 11, for example 0.1 meters per second.
  • the linear speed of the central line 9 varies at the level of the winding means 6.
  • the manufacturing device 11 comprises pitch variation means of the group propeller comprising two accumulators (2,8) respectively upstream and downstream of the winding means 6.
  • Each accumulator (2,8) comprises a movable drum (16, 17) for retaining a variable length of the central line 9. The linear speed of the central line 9 varies. when the position of one or the other of the mobile drums (16, 17) varies.
  • the manufacturing device 11 also comprises means 10 for controlling the position of each mobile drum (16, 17).
  • the control means 10 are connected to the accumulators (2, 8).
  • the position of each mobile drum (16, 17) is a function of the voltage amplitude of a corresponding control signal (S1, S2), the control signals (S1, S2) being generated by the control means 10.
  • a first corresponding mobile drum 16 is halfway up a first accumulator 8.
  • the first control signal S1 has a positive amplitude
  • the first mobile drum 16 is in an upper half 25 of the first accumulator 8.
  • the first control signal S1 has a negative amplitude
  • the first mobile drum 16 is in a low half 26 of the first accumulator 8.
  • the position of a second mobile drum 17 of a second accumulator 2 can follow the same behavior according to the amplitude of a second control signal S2.
  • the first control signal S1 and the second control signal S2 can be generated in such a way that at all times their values are opposite.
  • the positions of the first mobile drum 16 and the second mobile drum 17 relative to a midline at half height of each accumulator (2, 8) are thus opposed.
  • linear speed of the central line 9 at the winding means 6 is thus substantially equal to the linear speed of the central line upstream of the manufacturing device 11 incremented by a variation term.
  • the variation term is substantially proportional to a first derivative of the first control signal.
  • the term variation can thus be positive, negative or zero over time.
  • the control signals (S1, S2) must not change too rapidly.
  • the linear speed of the central line 9 can for example vary between 0.075 m / s and 0.12 m / s approximately. With such limited linear velocities, for an angular velocity of about 50 revolutions per minute, the pitch of the helix of groups varies between 0.09 m and 0.14 m approximately. Such values are of course only indicative.
  • the pitch of the group helix 20 can for example vary according to a sinusoidal function: the control signals (S1, S2) also vary according to a sinusoidal function.
  • the manufacturing device 11 may also comprise means for measuring the stiffness 7 of the central line 9.
  • the means for measuring the stiffness 7 are connected to the control means 10, thus making it possible to adjust the control signals so that the linear speed of the central line at the entrance of the winding means 6 is substantially equal to the linear speed of the central line at the exit of the winding means 6.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Communication Cables (AREA)

Abstract

The cable has four groups (P1-P4) wounded between them in order to form a helix of groups. Each group has two twisted conductive wires (FC11,FC12). Pitches (L1,L2,L3) of the helix of the groups varies along the cable between three limit values of same sign according to periodic function e.g. sinusoidal function. Independent claims are also included for the following: (1) a method of fabricating a helicoidal electric cable (2) a device for fabricating a helicoidal electric cable.

Description

La présente invention se rapporte au domaine des câbles électriques hélicoïdaux.The present invention relates to the field of helical electric cables.

Un câble électrique comprend un ou plusieurs groupes de fils conducteurs torsadés. Un groupe est classiquement constitué de deux fils conducteurs torsadés - dans ce cas, on parlera de paire - mais peut également comprendre plus de deux fils conducteurs torsadés entre eux.An electrical cable comprises one or more groups of twisted wires. A group is conventionally made of two twisted wires - in this case, we speak of pair - but can also include more than two wires twisted between them.

Un câble électrique hélicoïdal comprend plusieurs groupes enroulés entre eux de façon à former une hélice.A helical electrical cable comprises several groups wound together to form a helix.

La diaphonie désigne l'interférence électromagnétique entre groupes appartenant à un même câble électrique. Le phénomène de diaphonie pose fréquemment un problème quant à la transmission de données.Crosstalk refers to the electromagnetic interference between groups belonging to the same electric cable. The crosstalk phenomenon frequently poses a problem with data transmission.

Pour réduire la diaphonie, il est connu de torsader les fils conducteurs entre eux en hélice, et avec un pas différent d'un groupe à l'autre, afin d'empêcher les fils conducteurs d'un groupe donné de s'imbriquer dans les fils conducteurs des autres groupes.To reduce crosstalk, it is known to twist the conductive wires between them in a helix, and with a different pitch from one group to another, to prevent the conductive son of a given group from nesting in the lead wires of other groups.

Le brevet Américain US 6,318,062 décrit un procédé pour faire varier le pas de torsade au sein d'une paire. Ce procédé permet également d'éviter que des fils conducteurs soient grossièrement parallèles entre eux le long du câble en empêchant l'imbrication de fils conducteurs d'un groupe donné dans des fils conducteurs des autres groupes..US Patent 6,318,062 discloses a method for varying the twist pitch within a pair. This method also makes it possible to prevent conductive wires from being roughly parallel to one another along the cable by preventing the interweaving of conducting wires of a given group into conducting wires of the other groups.

Les fréquences transportées par les câbles électriques hélicoïdaux augmentant, il est aujourd'hui nécessaire de réduire davantage le phénomène de diaphonie.Frequencies transported by helical electric cables increasing, it is now necessary to further reduce the phenomenon of crosstalk.

La présente invention a pour objet un câble électrique hélicoïdal comprenant au moins deux groupes enroulés entre eux de façon à former une hélice de groupes, chaque groupe comprenant au moins deux fils conducteurs torsadés. Selon l'invention, le pas de l'hélice de groupes varie le long du câble électrique hélicoïdal entre deux valeurs limites de même signe.The present invention relates to a helical electrical cable comprising at least two groups wound together so as to form a helix of groups, each group comprising at least two twisted wires. According to the invention, the pitch of the group helix varies along the helical electric cable between two limit values of the same sign.

En ce qui concerne la diaphonie, le mécanisme principal de couplage entre les deux paires est l'inductance mutuelle, qui est une fonction périodique des pas de pairage et du pas de câblage qui varie le long du câble. En conséquence, des interférences accrues peuvent se produire entre le signal véhiculé par la paire qui transmet et le signal de diaphonie qui se propage dans la direction opposée dans la paire qui reçoit ; ce phénomène se produit aux fréquences qui sont en relation arithmétique avec la période de la fonction périodique mentionnée ci-dessus et la vitesse de propagation. Certains pics dans les courbes de la diaphonie mesurée en fonction de fréquence ont leur origine dans ce mécanisme, et plus la structure du câble est régulière et répétitive sur une longueur donnée de câble, plus leur amplitude et leur largeur augmentent. Il s'ensuit que les amplitudes de ces pics peuvent être réduites en brouillant la géométrie du câble et selon la présente invention cet objectif est accompli au moyen des variations dans le pas de câblage d'après une fonction déterminée ou aléatoire.With regard to crosstalk, the main mechanism of coupling between the two pairs is the mutual inductance, which is a periodic function of the pairing steps and the wiring pitch that varies along the cable. As a result, increased interference may occur between the signal conveyed by the transmitting pair and the crosstalk signal propagating in the opposite direction in the receiving pair; this phenomenon occurs at frequencies which are in arithmetic relation with the period of the periodic function mentioned above and the propagation velocity. Some peaks in the crosstalk curves measured as a function of frequency have their origin in this mechanism, and the more the cable structure is regular and repetitive over a given length of cable, the more their amplitude and their width increase. As a result, the amplitudes of these peaks can be reduced by scrambling the cable geometry and according to the present invention this objective is accomplished by means of variations in the wiring pitch according to a determined or random function.

Les variations du pas de l'hélice de groupes permettent d'assurer un moindre parallélisme entre les fils conducteurs, et par-là même de réduire la diaphonie.The variations of the pitch of the helix of groups make it possible to ensure a lesser parallelism between the conducting wires, and thereby reduce crosstalk.

Le câble électrique hélicoïdal selon l'invention peut comprendre au moins une hélice de groupes supplémentaire. Alternativement, le câble électrique hélicoïdal selon l'invention peut comprendre une seule hélice de groupe.The helical electric cable according to the invention may comprise at least one additional group helix. Alternatively, the helical electric cable according to the invention may comprise a single group helix.

Chaque hélice de groupes peut comprendre plus de deux groupes.Each group helix may comprise more than two groups.

Par exemple, le câble électrique hélicoïdal peut comprendre une hélice de groupe comprenant une dizaine de groupes enroulés. Alternativement, l'hélice de groupe peut comprendre strictement deux groupes.For example, the helical electrical cable may comprise a group helix comprising about ten coiled groups. Alternatively, the group helix can strictly comprise two groups.

Le câble électrique hélicoïdal selon l'invention peut comprendre plusieurs hélices de groupe, chaque hélice de groupe comprenant un nombre de groupes différent, ou bien un même nombre de groupes.The helical electric cable according to the invention may comprise several group helices, each group helix comprising a different number of groups, or the same number of groups.

Les groupes de fils conducteurs torsadés peuvent comprendre plus de deux fils conducteurs.The groups of twisted wires may comprise more than two wires.

Alternativement, chaque groupe de fils conducteurs comprend strictement deux fils conducteurs : on parlera alors de paire torsadée.Alternatively, each group of conductive yarns strictly comprises two conductive yarns: this will be referred to as a twisted pair.

Les fils conducteurs peuvent être torsadés entre eux de façon hélicoïdale, ou bien encore de façon alternée, dite « SZ ».The conductive wires may be twisted together helically or alternately, so-called "SZ".

Les groupes peuvent comprendre un même nombre de fils conducteurs, ou bien un nombre différent d'un groupe à l'autre.Groups can include the same number of leads, or a different number from one group to another.

Le pas de l'hélice de groupes varie avantageusement selon une fonction périodique, par exemple une fonction sinusoïdale.The pitch of the group helix advantageously varies according to a periodic function, for example a sinusoidal function.

Cette caractéristique n'est bien entendu pas limitative. Le pas de l'hélice peut par exemple varier de façon aléatoire.This characteristic is of course not limiting. The pitch of the helix may for example vary randomly.

La présente invention a également pour objet un procédé de fabrication d'un câble électrique hélicoïdal selon la présente invention. Le procédé comprend une étape d'enroulement des deux groupes de façon à former une hélice de groupes. Selon l'invention, l'enroulement est réalisé avec une vitesse variant entre deux vitesses limites de même signe de telle sorte que le pas de l'hélice de groupes varie le long du câble entre deux valeurs limites de même signe.The present invention also relates to a method of manufacturing a helical electric cable according to the present invention. The method comprises a step of winding the two groups so as to form a helix of groups. According to the invention, the winding is carried out with a speed varying between two limit speeds of the same sign so that the pitch of the group helix varies along the cable between two limit values of the same sign.

La vitesse variant entre les deux vitesses limites peut être une vitesse angulaire d'enroulement des deux groupes autour d'une ligne centrale, la ligne centrale étant en translation avec une vitesse linéaire sensiblement constante.The speed varying between the two limit speeds may be an angular winding speed of the two groups around a central line, the central line being in translation with a substantially constant linear speed.

Préférentiellement, la vitesse variant entre les deux vitesses limites est une vitesse linéaire d'une ligne centrale en translation, les deux groupes étant enroulés autour de la ligne centrale avec une vitesse angulaire sensiblement constante. Un tel procédé permet d'éviter de faire varier la vitesse angulaire d'enroulement, ce qui peut être avantageux en particulier lorsque l'inertie d'un dispositif d'enroulement est relativement élevée.Preferably, the speed varying between the two limit speeds is a linear speed of a central line in translation, the two groups being wound around the central line with a substantially constant angular velocity. Such a method makes it possible to avoid varying the winding angular speed, which can be advantageous particularly when the inertia of a winding device is relatively high.

Le procédé selon la présente invention peut également être mis en oeuvre sans ligne centrale physique, permettant ainsi de fabriquer un câble électrique hélicoïdal sans ligne centrale, que la vitesse variable soit une vitesse angulaire d'enroulement ou une vitesse linéaire de translation.The method according to the present invention can also be implemented without a physical central line, thus making it possible to manufacture a helical electric cable without a central line, whether the variable speed is an angular winding speed or a linear translational speed.

Plus généralement, la présente invention n'est pas limitée par la manière dont le procédé de fabrication est mis en oeuvre.More generally, the present invention is not limited by the manner in which the manufacturing process is carried out.

La présente invention a également pour objet un dispositif de fabrication d'un câble électrique hélicoïdal pour mettre en oeuvre le procédé selon l'invention. Le dispositif comprend des moyens d'enroulement des deux groupes de façon à former une hélice de groupes. Selon l'invention, le dispositif comprend par ailleurs des moyens de variation du pas de l'hélice de groupes entre deux valeurs limites de même signe. Les moyens de variation du pas de l'hélice de groupes comprennent :

  • deux accumulateurs, respectivement en amont et en aval des moyens d'enroulement, chaque accumulateur comprenant un tambour mobile permettant de retenir une longueur variable d'une ligne centrale, et
  • des moyens de contrôle de la position de chaque tambour mobile.
The present invention also relates to a device for manufacturing a helical electric cable for implementing the method according to the invention. The device comprises means for winding the two groups so as to form a helix of groups. According to the invention, the device further comprises means for varying the pitch of the helix of groups between two limit values of the same sign. The means for varying the pitch of the helix of groups comprise:
  • two accumulators respectively upstream and downstream of the winding means, each accumulator comprising a mobile drum for retaining a variable length of a central line, and
  • means for controlling the position of each mobile drum.

La présente invention n'est pas limitée par la nature des moyens de variation de pas de l'hélice de groupes.The present invention is not limited by the nature of pitch variation means of the group helix.

Le dispositif de fabrication selon l'invention comprend avantageusement des moyens de mesure de la raideur de la ligne centrale à l'entrée des moyens d'enroulement, les moyens de mesure étant reliés aux moyens de contrôle. Les moyens de mesure de la raideur permettent un meilleur contrôle de la valeur du pas de l'hélice de groupes, mais ne limitent aucunement la présente invention.The manufacturing device according to the invention advantageously comprises means for measuring the stiffness of the central line at the input of the winding means, the measuring means being connected to the control means. The stiffness measuring means allows better control of the pitch value of the group helix, but does not limit the present invention.

Les moyens d'enroulement comprennent avantageusement :

  • deux bobines, chaque bobine permettant de porter une réserve d'un des groupes de fil conducteur torsadé,
  • des moyens de rotation permettant un mouvement de rotation des bobines autour d'un axe longitudinal,
  • une plaque de répartition comprenant deux ouvertures périphériques et une ouverture centrale, chaque ouverture périphérique étant destinée à recevoir un des groupes de fil conducteur torsadé, et l'ouverture centrale étant destinée à recevoir une ligne centrale, et
  • une filière à la sortie de la plaque de répartition.
The winding means advantageously comprise:
  • two coils, each coil for carrying a reserve of one of the groups of twisted conductive wire,
  • rotation means for rotating the coils about a longitudinal axis,
  • a distribution plate comprising two peripheral openings and a central opening, each peripheral opening being intended to receive one of the groups of twisted conductive wire, and the central opening being intended to receive a central line, and
  • a die at the outlet of the distribution plate.

La présente invention n'est bien entendu pas limitée par la nature des moyens d'enroulement.The present invention is of course not limited by the nature of the winding means.

Avantageusement, le dispositif de fabrication comprend par ailleurs des moyens d'application d'un liant à la sortie de la filière, et deux chenilles de tirage. De telles caractéristiques ne sont pas limitatives.Advantageously, the manufacturing device further comprises means for applying a binder at the outlet of the die, and two pulling tracks. Such characteristics are not limiting.

L'invention est décrite ci-après plus en détail à l'aide de figures ne correspondant qu'à un mode de réalisation préféré de l'invention.The invention is described below in more detail using figures corresponding to only one preferred embodiment of the invention.

La figure 1 représente un exemple de câble électrique hélicoïdal selon un mode de réalisation de la présente invention.Figure 1 shows an example of helical electrical cable according to an embodiment of the present invention.

La figure 2 représente un exemple de dispositif de fabrication selon le mode de réalisation préféré de la présente invention.Fig. 2 shows an example of a manufacturing device according to the preferred embodiment of the present invention.

Le câble électrique hélicoïdal représenté sur la figure 1 comprend quatre groupes P1, P2, P3 et P4 enroulés entre eux de façon à former une hélice de groupes 1. Chaque groupe Pi, i variant entre 1 et 4, comprend deux fils conducteurs torsadés FCi1 et FCi2: on parlera donc de paires.The helical electric cable shown in FIG. 1 comprises four groups P1, P2, P3 and P4 wound together to form a helix of groups 1. Each group Pi, i varying between 1 and 4, comprises two twisted conductive wires FCi1 and FCi2: we will talk about pairs.

Pour chaque paire Pi, les fils conducteurs FCi1 et FCi2 sont torsadés de façon hélicoïdale, et avec un pas différent d'une paire à l'autre. Le pas d'une première paire P1 est ainsi inférieur au pas d'une seconde paire P2.For each pair Pi, the conductive wires FCi1 and FCi2 are twisted helically, and with a different pitch from one pair to another. The pitch of a first pair P1 is thus smaller than the pitch of a second pair P2.

Le câble électrique hélicoïdal peut également comprendre des couches externes non représentées qui protègent l'hélice de groupes 1.The helical electric cable may also comprise outer layers, not shown, which protect the propeller from groups 1.

Le pas de l'hélice de groupe 1 varie le long du câble électrique hélicoïdal entre deux valeurs limites. Sur le tronçon de câble électrique sinusoïdal représenté sur la figure 1, le pas de l'hélice de groupes prend une première valeur L1, une seconde valeur L2 puis une troisième valeur L3.The pitch of the group 1 propeller varies along the helical electric cable between two limit values. On the section of sinusoidal electric cable shown in FIG. 1, the pitch of the group helix takes a first value L1, a second value L2 and then a third value L3.

Les fils conducteurs des différentes paires P1, P2, P3 et P4 ne sont ainsi que rarement parallèles entre eux, et sur des longueurs relativement courtes.The conducting wires of the different pairs P1, P2, P3 and P4 are thus only rarely parallel to each other, and over relatively short lengths.

La figure 2 illustre un exemple de dispositif de fabrication d'un tel câble. Le dispositif de fabrication 11 comprend des moyens d'enroulement 6 de deux groupes (18a, 18b) autour d'une ligne centrale 9. La ligne centrale 9 subit un mouvement de translation entre des chenilles d'entrée 2 et des chenilles de sortie 3.FIG. 2 illustrates an example of a device for manufacturing such a cable. The manufacturing device 11 comprises winding means 6 of two groups (18a, 18b) around a central line 9. The central line 9 undergoes a translational movement between input tracks 2 and output tracks 3 .

Chaque groupe (18a, 18b) comprend plusieurs fils conducteurs torsadés, par exemple des fils de cuivre.Each group (18a, 18b) comprises several twisted conductive wires, for example copper wires.

Dans cet exemple, les moyens d'enroulement 6 comprennent des bobines (21 a, 21 b). Chaque bobine (21 a, 21 b) permet de porter une réserve de l'un des groupes (18a, 18b). Des moyens de rotation non représentés permettent un mouvement de rotation des bobines (21 a, 21 b) autour de la ligne centrale 9. Les deux groupes (18a, 18b) sont ainsi enroulés de façon à former une hélice de groupes 20.In this example, the winding means 6 comprise coils (21 a, 21 b). Each coil (21a, 21b) can carry a reserve of one of the groups (18a, 18b). Unrepresented rotation means allow rotation of the coils (21a, 21b) around the center line 9. The two groups (18a, 18b) are thus wound to form a group helix 20.

Les moyens d'enroulement 6 comprennent également une plaque de répartition 5 comprenant deux ouvertures périphériques (23a, 23b) et une ouverture centrale 24. Chaque ouverture périphérique (23a, 23b) reçoit un des groupes (21 a, 21 b). L'ouverture centrale 24 reçoit la ligne centrale 9. Les moyens d'enroulement 6 peuvent également comprendre une filière 4 à la sortie de la plaque de répartition 5.The winding means 6 also comprise a distribution plate 5 comprising two peripheral openings (23a, 23b) and a central opening 24. Each peripheral opening (23a, 23b) receives one of the groups (21a, 21b). The central opening 24 receives the central line 9. The winding means 6 may also comprise a die 4 at the outlet of the distribution plate 5.

A la sortie de la filière 4, des moyens d'application d'un liant 3 permettent d'appliquer un liant pour fixer la position des groupes enroulés.At the outlet of the die 4, means for applying a binder 3 make it possible to apply a binder to fix the position of the wound groups.

L'enroulement des groupes (18a, 18b) autour de la ligne centrale 9 est réalisé avec une vitesse angulaire sensiblement constante, par exemple 50 tours par minute. En revanche, la vitesse linéaire de la ligne centrale 9 varie au cours du temps, au moins au niveau des moyens d'enroulement 6, de telle sorte que l'hélice de groupes 20 présente un pas variant le long du câble électrique hélicoïdal ainsi fabriqué.The winding of the groups (18a, 18b) around the central line 9 is performed with a substantially constant angular velocity, for example 50 revolutions per minute. On the other hand, the linear speed of the central line 9 varies over time, at least at the level of the winding means 6, so that the group helix 20 has a pitch that varies along the helical electric cable thus produced. .

La vitesse linéaire de la ligne centrale 9 est sensiblement constante au cours du temps en amont du dispositif de fabrication 11, ainsi qu'en aval du dispositif de fabrication 11, par exemple 0.1 mètre par seconde. La vitesse linéaire de la ligne centrale 9 varie au niveau des moyens d'enroulement 6.The linear speed of the central line 9 is substantially constant over the time upstream of the manufacturing device 11, and downstream of the manufacturing device 11, for example 0.1 meters per second. The linear speed of the central line 9 varies at the level of the winding means 6.

Le dispositif de fabrication 11 comprend des moyens de variation de pas de l'hélice de groupes comprenant deux accumulateurs (2,8) respectivement en amont et en aval des moyens d'enroulement 6. Chaque accumulateur (2,8) comprend un tambour mobile (16, 17) permettant de retenir une longueur variable de la ligne centrale 9. La vitesse linéaire de la ligne centrale 9 varie lorsque la position de l'un ou l'autre des tambours mobiles (16, 17) varie.The manufacturing device 11 comprises pitch variation means of the group propeller comprising two accumulators (2,8) respectively upstream and downstream of the winding means 6. Each accumulator (2,8) comprises a movable drum (16, 17) for retaining a variable length of the central line 9. The linear speed of the central line 9 varies. when the position of one or the other of the mobile drums (16, 17) varies.

Le dispositif de fabrication 11 comprend également des moyens de contrôle 10 de la position de chaque tambour mobile (16, 17). Les moyens de contrôle 10 sont reliés aux accumulateurs (2, 8). La position de chaque tambour mobile (16, 17) est fonction de l'amplitude en tension d'un signal de commande correspondant (S1, S2), les signaux de commande (S1, S2) étant générés par les moyens de contrôle 10.The manufacturing device 11 also comprises means 10 for controlling the position of each mobile drum (16, 17). The control means 10 are connected to the accumulators (2, 8). The position of each mobile drum (16, 17) is a function of the voltage amplitude of a corresponding control signal (S1, S2), the control signals (S1, S2) being generated by the control means 10.

Par exemple, lorsqu'un premier signal de commande S1 a une amplitude sensiblement nulle, un premier tambour mobile correspondant 16 se trouve à mi-hauteur d'un premier accumulateur 8. Lorsque le premier signal de commande S1 a une amplitude positive, le premier tambour mobile 16 se trouve dans une moitié supérieure 25 du premier accumulateur 8. Lorsque le premier signal de commande S1 a une amplitude négative, le premier tambour mobile 16 se trouve dans une moitié basse 26 du premier accumulateur 8.For example, when a first control signal S1 has a substantially zero amplitude, a first corresponding mobile drum 16 is halfway up a first accumulator 8. When the first control signal S1 has a positive amplitude, the first mobile drum 16 is in an upper half 25 of the first accumulator 8. When the first control signal S1 has a negative amplitude, the first mobile drum 16 is in a low half 26 of the first accumulator 8.

La position d'un second tambour mobile 17 d'un second accumulateur 2 peut suivre un même comportement selon l'amplitude d'un second signal de commande S2.The position of a second mobile drum 17 of a second accumulator 2 can follow the same behavior according to the amplitude of a second control signal S2.

Le premier signal de commande S1 et le second signal de commande S2 peuvent être générés de façons à ce qu'à tout instant leurs valeurs soient opposées. Les positions du premier tambour mobile 16 et du second tambour mobile 17 relativement à une ligne médiane à mi-hauteur de chaque accumulateur (2, 8) sont ainsi opposées.The first control signal S1 and the second control signal S2 can be generated in such a way that at all times their values are opposite. The positions of the first mobile drum 16 and the second mobile drum 17 relative to a midline at half height of each accumulator (2, 8) are thus opposed.

Lorsque les tambours mobiles (16, 17) se déplacent, la vitesse linéaire de la ligne centrale 9 au niveau des moyens d'enroulement 6 varie.When the moving drums (16, 17) move, the linear speed of the center line 9 at the winding means 6 varies.

Ainsi la vitesse linéaire de la ligne centrale 9 au niveau des moyens d'enroulement 6 est ainsi sensiblement également égale à la vitesse linéaire de la ligne centrale en amont du dispositif de fabrication 11 incrémentée d'un terme de variation. Le terme de variation est sensiblement proportionnel à une dérivée première du premier signal de commande. Le terme de variation peut ainsi être positif, négatif ou nul au cours du temps.Thus the linear speed of the central line 9 at the winding means 6 is thus substantially equal to the linear speed of the central line upstream of the manufacturing device 11 incremented by a variation term. The variation term is substantially proportional to a first derivative of the first control signal. The term variation can thus be positive, negative or zero over time.

Pour que le pas de l'hélice de groupes 20 soit confiné entre deux valeurs limites de même signe, il faut que les signaux de commande (S1, S2) ne varient pas trop rapidement. La vitesse linéaire de la ligne centrale 9 peut par exemple varier entre 0.075 m/s et 0.12 m/s environ. Avec de telles vitesses linéaires limites, pour une vitesse angulaire de 50 tours par minute environ, le pas de l'hélice de groupes varie entre 0.09 m et 0.14 m environ. De telles valeurs ne sont bien entendu qu'indicatives.In order for the pitch of the group helix 20 to be confined between two limit values of the same sign, the control signals (S1, S2) must not change too rapidly. The linear speed of the central line 9 can for example vary between 0.075 m / s and 0.12 m / s approximately. With such limited linear velocities, for an angular velocity of about 50 revolutions per minute, the pitch of the helix of groups varies between 0.09 m and 0.14 m approximately. Such values are of course only indicative.

Le pas de l'hélice de groupes 20 peut par exemple varier selon une fonction sinusoïdale : les signaux de commande (S1, S2) varient alors également selon une fonction sinusoïdale.The pitch of the group helix 20 can for example vary according to a sinusoidal function: the control signals (S1, S2) also vary according to a sinusoidal function.

Le dispositif de fabrication 11 peut également comprendre des moyens de mesure de la raideur 7 de la ligne centrale 9. Les moyens de mesure de la raideur 7 sont reliés aux moyens de contrôle 10, permettant ainsi d'ajuster les signaux de commande pour que la vitesse linéaire de la ligne centrale à l'entrée des moyens d'enroulement 6 soit sensiblement égale à la vitesse linéaire de la ligne centrale à la sortie des moyens d'enroulement 6.The manufacturing device 11 may also comprise means for measuring the stiffness 7 of the central line 9. The means for measuring the stiffness 7 are connected to the control means 10, thus making it possible to adjust the control signals so that the linear speed of the central line at the entrance of the winding means 6 is substantially equal to the linear speed of the central line at the exit of the winding means 6.

Claims (9)

Câble électrique hélicoïdal comprenant
au moins deux groupes (P1, P2) enroulés entre eux de façon à former une hélice de groupes (1), chaque groupe comprenant au moins deux fils conducteurs torsadés (FC11, FC12, FC21, FC22),
caractérisé en ce que
le pas (L1, L2, L3) de l'hélice de groupes varie le long du câble électrique hélicoïdal entre deux valeurs limites de même signe.Helical electric cable comprising
at least two groups (P1, P2) wound together to form a group helix (1), each group comprising at least two twisted conductive wires (FC11, FC12, FC21, FC22),
characterized in that
the pitch (L1, L2, L3) of the group helix varies along the helical electric cable between two limit values of the same sign. Câble électrique hélicoïdal selon la revendication 1, comprenant au moins une hélice de groupes supplémentaire.Spiral electric cable according to claim 1, comprising at least one additional group helix. Câble électrique hélicoïdal selon l'une des revendications précédentes, dans lequel
le pas de l'hélice de groupes varie selon une fonction périodique.Spiral electric cable according to one of the preceding claims, wherein
the pitch of the group helix varies according to a periodic function. Procédé de fabrication d'un câble électrique hélicoïdal selon l'une des revendications précédentes, le procédé comprenant : une étape d'enroulement de deux groupes (18a, 18b) de façon à former une hélice de groupes (20), chaque groupe comprenant deux fils conducteurs torsadés, caractérisé en ce que l'enroulement est réalisé avec une vitesse variant entre deux vitesses limites de même signe de telle sorte que le pas de l'hélice de groupes varie le long du câble entre deux valeurs limites de même signe. A method of manufacturing a helical electrical cable according to one of the preceding claims, the method comprising: a step of winding two groups (18a, 18b) so as to form a group helix (20), each group comprising two twisted conductive wires, characterized in that the winding is carried out with a speed varying between two limit speeds of the same sign so that the pitch of the group helix varies along the cable between two limit values of the same sign. Procédé de fabrication selon la revendication 4, dans lequel
la vitesse variant entre les deux vitesses limites est une vitesse angulaire d'enroulement des deux groupes autour d'une ligne centrale, la ligne centrale étant en translation avec une vitesse linéaire sensiblement constante.Manufacturing method according to claim 4, wherein
the speed varying between the two limit speeds is an angular winding speed of the two groups around a central line, the central line being in translation with a substantially constant linear speed. Procédé de fabrication selon la revendication 4, dans lequel : la vitesse variant entre les deux vitesses limites est une vitesse linéaire d'une ligne centrale en translation (9), les deux groupes (18a, 18b) étant enroulés autour de la ligne centrale avec une vitesse angulaire sensiblement constante. Manufacturing method according to claim 4, wherein: the speed varying between the two limit velocities is a linear speed of a translational central line (9), the two groups (18a, 18b) being wound around the centerline with a substantially constant angular velocity. Dispositif de fabrication (11) d'un câble électrique hélicoïdal pour mettre en oeuvre le procédé selon la revendication 6, comprenant : des moyens d'enroulement (6) des deux groupes (18a, 18b) de façon à former une hélice de groupes (20), caractérisé en ce que le dispositif de fabrication comprend par ailleurs des moyens de variation du pas de l'hélice de groupes entre deux valeurs limites de même signe, comprenant
deux accumulateurs (2, 8), respectivement en amont et en aval des moyens d'enroulement, chaque accumulateur comprenant un tambour mobile (16, 17) permettant de retenir une longueur variable d'une ligne centrale (9), et
des moyens de contrôle (10) de la position de chaque tambour mobile. Apparatus (11) for manufacturing a helical electric cable for carrying out the method according to claim 6, comprising: means for winding (6) the two groups (18a, 18b) so as to form a group helix (20), characterized in that the manufacturing device further comprises means for varying the pitch of the helix of groups between two limit values of the same sign, comprising
two accumulators (2, 8) respectively upstream and downstream of the winding means, each accumulator comprising a movable drum (16, 17) for retaining a variable length of a central line (9), and
control means (10) for the position of each mobile drum. Dispositif de fabrication (11) selon la revendication 7, comprenant par ailleurs des moyens de mesure de la raideur (7) de la ligne centrale (9) à l'entrée des moyens d'enroulement (6), les moyens de mesure étant reliés aux moyens de contrôle (10).Manufacturing device (11) according to claim 7, further comprising means for measuring the stiffness (7) of the central line (9) at the inlet of the winding means (6), the measuring means being connected to the control means (10). Dispositif de fabrication (11) selon l'une des revendications 7 à 8, dans lequel les moyens d'enroulement (6) comprennent
deux bobines (21 a, 21 b), chaque bobine permettant de porter une réserve d'un des groupes (18a, 18b) de fil conducteur torsadé,
des moyens de rotation permettant un mouvement de rotation des bobines autour d'un axe longitudinal,
une plaque de répartition (5) comprenant deux ouvertures périphériques (23a, 23b) et une ouverture centrale (24), chaque ouverture périphérique étant destinée à recevoir un des groupes de fil conducteur torsadé, et l'ouverture centrale étant destinée à recevoir une ligne centrale, et
une filière (4) à la sortie de la plaque de répartition.Manufacturing device (11) according to one of claims 7 to 8, wherein the winding means (6) comprise
two coils (21 a, 21 b), each coil for carrying a reserve of one of the groups (18a, 18b) of twisted conductive wire,
rotation means for rotating the coils about a longitudinal axis,
a distribution plate (5) comprising two peripheral openings (23a, 23b) and a central opening (24), each peripheral opening being intended to receive one of the groups of twisted conductive wire, and the central opening being intended to receive a line central, and
a die (4) at the outlet of the distribution plate.
EP05300095A 2005-02-04 2005-02-04 Helical electrical cable Withdrawn EP1688968A1 (en)

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US11/342,350 US7663058B2 (en) 2005-02-04 2006-01-26 Helically-wound electric cable
KR1020060010887A KR101213771B1 (en) 2005-02-04 2006-02-03 A helically-wound electric cable
US12/012,734 US7497070B2 (en) 2005-02-04 2008-02-05 Helically-wound electric cable
US12/288,849 US8069644B2 (en) 2005-02-04 2008-10-23 Helically-wound electric cable

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US8069644B2 (en) 2011-12-06
KR20060089680A (en) 2006-08-09
US20080134655A1 (en) 2008-06-12
US20090126969A1 (en) 2009-05-21
US7497070B2 (en) 2009-03-03
US7663058B2 (en) 2010-02-16
KR101213771B1 (en) 2012-12-18
US20060175076A1 (en) 2006-08-10

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