WO2014019635A1 - Câble coaxial pour applications intensives - Google Patents

Câble coaxial pour applications intensives Download PDF

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Publication number
WO2014019635A1
WO2014019635A1 PCT/EP2013/001739 EP2013001739W WO2014019635A1 WO 2014019635 A1 WO2014019635 A1 WO 2014019635A1 EP 2013001739 W EP2013001739 W EP 2013001739W WO 2014019635 A1 WO2014019635 A1 WO 2014019635A1
Authority
WO
WIPO (PCT)
Prior art keywords
coaxial cable
filler
screen
designed
inner conductor
Prior art date
Application number
PCT/EP2013/001739
Other languages
German (de)
English (en)
Inventor
Erwin Köppendörfer
Original Assignee
Leoni Kabel Holding Gmbh
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 Leoni Kabel Holding Gmbh filed Critical Leoni Kabel Holding Gmbh
Priority to EP13733949.5A priority Critical patent/EP2880664B1/fr
Publication of WO2014019635A1 publication Critical patent/WO2014019635A1/fr

Links

Classifications

    • 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
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1808—Construction of the conductors
    • H01B11/1813—Co-axial cables with at least one braided conductor
    • 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
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1804—Construction of the space inside the hollow inner conductor
    • 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
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1808—Construction of the conductors
    • H01B11/1821—Co-axial cables with at least one wire-wound conductor
    • 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
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1882—Special measures in order to improve the refrigeration

Definitions

  • the invention relates to a coaxial cable for high performance applications with an inner conductor which is concentrically surrounded by a dielectric and by an outer conductor.
  • the so-called skin effect In the transmission of high power in the alternating current range, the so-called skin effect is known, which ensures a displacement of the current transported via the conductor to the edge of the conductor.
  • the skin effect is frequency-dependent and increases with higher frequencies. In particular, for lines that are designed for the transmission of very high frequencies of> 1 MHz, this means that only the outermost cross-section of the conductor contributes to power transmission. If at the same time high electrical powers are to be transmitted, then the conductor must be chosen to be large enough to provide a sufficient cross-section for the current transport available.
  • the object of the invention is to provide a coaxial cable for high-performance applications with improved mechanical properties with good electrical properties.
  • a coaxial cable for high-performance applications with an inner conductor, which is surrounded concentrically by a dielectric and by an outer conductor, wherein the inner conductor as a fleece xibler, tubular screen is formed of a plurality of shield wires.
  • the coaxial cable Due to the design of the inner conductor as a flexible, tubular screen, the coaxial cable has a high bending flexibility and is also suitable for the transmission of high power at high frequencies, for example, 1 MHz and larger.
  • the screen preferably displays a so-called optical coverage ⁇ 100%.
  • the optical coverage is in particular about 90%.
  • Optical coverage here means the covering of the inner cavity enclosed by the screen in a geometrical view. In a 100% coverage so the entire surface of the screen is formed by shield wires. At a lower optical coverage gaps are included in the lateral surface of the screen. With a 90% coverage, this means that about 10% of the area of the shell's shroud is not covered by shielding wires. A lower coverage leads to a higher bending flexibility.
  • the variation of the optical cover can be set comparatively easily in terms of production technology in the manufacture of braided shields but also of helical screens.
  • the screen itself is not intrinsically stable due to its design of comparatively loosely interconnected shield wires, ie it is not pressure-stable in the radial direction and is already compressed at low radial external pressures.
  • the screen In order to maintain the desired tubular configuration, the screen therefore has in its internal cavity one or more supporting elements which ensure the maintenance of an annular cross-section of the screen. Conveniently, therefore, a continuously extending filler is introduced as a support element over the entire length of the inner conductor.
  • the filler itself is again formed in several parts.
  • special properties for the filler and the entire coaxial cable such as mechanical properties, can be adjusted specifically.
  • the filler comprises a fiber bundle or is also formed by such a fiber bundle.
  • the fiber bundle is a fiber bundle
  • the fiber bundle can also be a textile structure such as a braid, etc.
  • the filler has an extruded plastic strand on which the screen rests. Since such an extruded plastic strand has a comparatively good dimensional stability, it is ensured that the inner conductor retains its desired annular configuration.
  • the plastic strand is designed as a hollow strand with internal cavity. This in turn is filled in an expedient manner with the already mentioned fiber bundle.
  • the filler forms a thermal energy storage preferably with a short-term heat output in the range of a few kW.
  • the filler is in particular a material, which is designed for the reversible absorption and release of heat.
  • Formed latent heat storage In such latent heat storage is generally at a defined temperature, a phase transformation in which at a constant temperature heat, for example, heat of fusion, recorded or later released again.
  • the filler is formed as a compound of several components with different melting temperature.
  • This is understood to mean a mixture of different plastic materials which are still separated at least at the microscopic level so that they melt in the compound composite at least locally at different temperatures.
  • This is in particular at least one reversible melting and re-solidifiable component.
  • the melting temperatures are therefore preferably significantly different, for example by more than 20 ° C to 50 ° C. The effect is based on the fact that the low-melting component melts on reaching its melting temperature and thereby absorbs heat. At the same time, the higher-melting component remains in its solid starting state, so that overall the filler retains its geometry and does not "melt".
  • a function line is guided in this in an expedient development.
  • a line for providing a technical functionality such as a supply line or a cooling line is integrated within the screen.
  • the free inner cavity is therefore used in a particularly efficient manner.
  • a signal or data line is guided in the screen.
  • This function line preferably forms the filler without further components.
  • several different functional lines can be guided within the inner cavity.
  • the signal lines themselves may be electrical signal lines or optical signal lines.
  • FIG. 1 shows in a simplified cross-sectional view of the structure of a coaxial cable according to the invention with a screen as an inner conductor.
  • the coaxial cable 2 has an inner conductor designed as a braided shield 4, which is surrounded concentrically by a dielectric 6 made of a suitable plastic and an outer conductor 8.
  • the outer conductor 8 is formed in two layers in the embodiment of an inner screen 8A and an outer screen 8B, both of which are arranged concentrically to the braid shield 4.
  • the inner screen 8A is also formed as a braid screen of a plurality of metallic individual wires.
  • the outer screen 8B is a metallic foil in the embodiment.
  • the outer conductor 8 is surrounded concentrically by an insulating jacket 10 made of a suitable electrically insulating plastic material.
  • the inner conductor is a screen 4, in particular braid screen of a plurality of individual metallic wires.
  • the screen 4 basically consists of a plurality of these more or less loosely connected and in particular intertwined individual wires.
  • the particular advantage is to be seen in the fact that in comparison to inner conductors, which are designed as rigid metal tubes, a significantly higher (bending) flexibility is achieved.
  • the flexibility is in this case preferably by the choice of braid parameters, such as the so-called coverage, mesh size, etc. depending on desired requirements set.
  • braid parameters such as the so-called coverage, mesh size, etc. depending on desired requirements set.
  • a coaxial cable 2 is thereby formed with a maximum of flexibility, which can also be laid in comparatively narrow bending radii. without affecting the electrical / mechanical properties.
  • the braid shield 4 generally has an annular cross section and thereby defines an internal cavity. This is filled with a filler 12, which has a sufficiently high rigidity, so that it defines a dimensionally stable circular cross-sectional area to set the desired ring shape of the braid shield 4.
  • the filler 12 is formed in two parts with a central strand 12A, in particular from a fiber bundle, for example made of cotton fibers, and a filling tube 12B surrounding the central strand 12A.
  • a central strand 12A in particular from a fiber bundle, for example made of cotton fibers
  • a filling tube 12B surrounding the central strand 12A.
  • This is in particular an extruded tube made of plastic with good dimensional stability and high bending elasticity.
  • the filling tube 12B is preferably made of a material which is suitable for storing thermal energy.
  • a certain overload safety is created at least short-term electrical overload, which leads to an increase in temperature.
  • the filler 12 is therefore designed to form such a thermal energy store as a whole as a solid strand of suitable material.
  • here offers a compound of the two plastics
  • Polypropylene and polyethylene Polypropylene melts at higher temperatures than polyethylene. When the temperature reaches the melting temperature of the polyethylene, polyethylene melts. However, the filler 12 itself is kept in shape because of the still solid polypropylene. There is only a softening of the filler 12. At the same time, the filler 12 can absorb a lot of heat energy by this measure. As a result, the coaxial cable 2 can be kept in its nominal temperature range even with an at least short-term high heat input due to high electrical power. This can Overall, the design of the coaxial cable are made for lower load peaks, so that overall the coaxial cable can be made low.
  • the coaxial cable 2 described here is suitable, in particular, for transmitting higher-frequency electrical currents having a frequency of at least> 50 Hz and preferably> several 100 kHz up to the MHz range.
  • this coaxial cable 2 serves to transmit high electrical (pulse) powers, for example in the range from 50 to 2500 watts.
  • the geometric dimensions of the coaxial cable and of the individual components (4, 6, 8, 10, 12) arranged concentrically to one another are suitably selected depending on the desired requirement.

Landscapes

  • Communication Cables (AREA)
  • Insulated Conductors (AREA)

Abstract

L'invention concerne un câble coaxial pour applications intensives. Elle vise à fournir un câble coaxial flexible (2) pour des applications intensives. A cet effet, ledit câble comporte un conducteur intérieur (4) formé d'une tresse de blindage (4) et entouré, comme il est d'usage, par un diélectrique (6) et par un conducteur extérieur (8). La tresse de blindage (4) définit une cavité intérieure, laquelle est remplie d'une matière de remplissage (12A, B). La matière de remplissage (12A, B) est de manière appropriée un élément fonctionnel et se présente par exemple sous la forme d'un accumulateur d'énergie thermique, ou comprend une ligne de transmission de signaux ou de données.
PCT/EP2013/001739 2012-07-30 2013-06-12 Câble coaxial pour applications intensives WO2014019635A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13733949.5A EP2880664B1 (fr) 2012-07-30 2013-06-12 Câble coaxial pour applications intensives

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210014944 DE102012014944A1 (de) 2012-07-30 2012-07-30 Koaxialkabel für Hochleistungsanwendungen
DE102012014944.1 2012-07-30

Publications (1)

Publication Number Publication Date
WO2014019635A1 true WO2014019635A1 (fr) 2014-02-06

Family

ID=48746416

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/001739 WO2014019635A1 (fr) 2012-07-30 2013-06-12 Câble coaxial pour applications intensives

Country Status (3)

Country Link
EP (1) EP2880664B1 (fr)
DE (1) DE102012014944A1 (fr)
WO (1) WO2014019635A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3211642A1 (fr) 2016-02-23 2017-08-30 LEONI Kabel Holding GmbH Câble de données et fil de litz
DE102019112742A1 (de) * 2019-05-15 2020-11-19 Leoni Kabel Gmbh Koaxialleitung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5298682A (en) * 1992-08-20 1994-03-29 Wireworld By David Salz, Inc. Optimized symmetrical coaxial cable
US6583360B1 (en) * 2002-02-08 2003-06-24 Igor Yudashkin Coaxial audio cable assembly

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE913431C (de) * 1941-04-04 1954-06-14 Ialovakabelia Lorenz Vacha Hoc Hochfrequenzkabel mit konstanter Daempfung
CA1195744A (fr) * 1983-04-15 1985-10-22 Hugh A. Edwards Methode de fabrication de cables coaxiaux fuyants
JPH10154421A (ja) * 1996-11-21 1998-06-09 Chubu Electric Power Co Inc トリプレックス形ｃｖケーブル
US6509521B1 (en) * 2000-11-10 2003-01-21 Scimed Life Systems, Inc. X-ray catheter with coaxial conductor
CH701871A1 (de) * 2009-09-25 2011-03-31 Brugg Ag Kabelwerke Elektrooptisches Kabel.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5298682A (en) * 1992-08-20 1994-03-29 Wireworld By David Salz, Inc. Optimized symmetrical coaxial cable
US6583360B1 (en) * 2002-02-08 2003-06-24 Igor Yudashkin Coaxial audio cable assembly

Also Published As

Publication number Publication date
DE102012014944A1 (de) 2014-01-30
EP2880664A1 (fr) 2015-06-10
EP2880664B1 (fr) 2016-10-12

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