EP1946334A1 - Cable multiconducteur pour la transmission de courants alternatifs de forme rectangulaire - Google Patents

Cable multiconducteur pour la transmission de courants alternatifs de forme rectangulaire

Info

Publication number
EP1946334A1
EP1946334A1 EP06818452A EP06818452A EP1946334A1 EP 1946334 A1 EP1946334 A1 EP 1946334A1 EP 06818452 A EP06818452 A EP 06818452A EP 06818452 A EP06818452 A EP 06818452A EP 1946334 A1 EP1946334 A1 EP 1946334A1
Authority
EP
European Patent Office
Prior art keywords
conductor
conductor cable
cable
cable according
stranded
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.)
Ceased
Application number
EP06818452A
Other languages
German (de)
English (en)
Inventor
Christoph Studer
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.)
Studer Schweiz AG
Original Assignee
Studer Draht und Kabelwerk AG
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 Studer Draht und Kabelwerk AG filed Critical Studer Draht und Kabelwerk AG
Publication of EP1946334A1 publication Critical patent/EP1946334A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/04—Concentric cables

Definitions

  • the invention relates to a multi-conductor cable for the transmission of rectangular alternating currents according to the preamble of claim 1.
  • Electric cables for energy transmission with alternating currents which have a rectangular shape, and thus have a high proportion of harmonics, are also suitable for the transport of large single-phase currents with frequencies of more than 50 Hz.
  • the design targets high current density applications that could generate large thermal heaters as well as strong, interfering magnetic fields and unpleasant noise.
  • Such cables are required for applications in which almost rectangular currents are generated to avoid switching losses and these must be transported to a consumer. For example, as a connection between single-phase inverter and transformer such cables can be used advantageously.
  • Known standard shielded cables for these applications are normally used for conducting sinusoidal currents of 50 or 60 Hz, calculated according to known tables. If rectangular currents are transmitted, the current loads must be reduced with cut-off factors in order to avoid overheating of the cables. Most often multi-core cables are used with or without common shield and common outer sheath, as they often occur as a motor connection cable.
  • a conventional cable behaves unfavorably with conventionally twisted return conductors in the higher-frequency current range with respect to the noise emission.
  • the opposite currents through the individual wires cause ken a pulsating repulsion of the stranding and this has acoustic noise.
  • the invention has for its object to provide a conductor cable according to the aforementioned genus, which has low levels of electromagnetic radiation, acoustic interference, the skin effect and highest possible heat radiation.
  • a construction with four stranded coaxial single-core cables without a common outer protective jacket is used, since in this case the ratio of the surface for the heat radiation to the conductor cross-sections is optimally designed.
  • FIG. 1 shows a four-conductor cable according to the invention in cross-section
  • FIG. 2 shows a partial cross-section of a variant of a single single-wire electrical cable of such a two- or four-conductor cable.
  • Fig. 1 The illustrated in Fig. 1 is designed specifically for the transmission of alternating currents with an approximately rectangular shape.
  • Such special cables are used in the field of rail vehicles for the connection between DC chopper and transformer in the application of multi-stream systems and they are based on the peculiarities explained above.
  • Such a four-conductor cable 10 has four stranded Elektroka- bel 9, which are helically wound around a central longitudinal member 11.
  • This longitudinal element 11 serves as a centering support of this electric cable 9 and is preferably made of a heat-resistant plastic.
  • the four single-core electric cables 9 of this multi-conductor cable 10 are formed identically. They each have a finely stranded flexible inner conductor 1 and a finely stranded, arranged around the inner conductor 1 fine-stranded, formed from a number of individual conductors 4 'counter conductor 4.
  • the use of such finely stranded inner conductors 1 and counter conductors 4 results in a slight flexibility of the conductor cable 10.
  • the center of the inner conductor could be constructed of non-conductive material and thus as a waveguide, if due to high frequencies the innermost fine-wire conductors due to the skin effect not contribute to conductivity anyway.
  • a two-layer insulation system is provided, which is composed of an extruded heat-resistant flexible plastic layer 2 and a second layer 3. Both are also advantageously radiation crosslinked, ie they no longer melt at higher temperatures, as is the case in the thermoplastic state.
  • the individual conductors 4 'of the reverse polarity return conductor 4 are arranged uniformly around the layer 3 parallel to one another. They are each made of finely stranded copper strands or the like and a conventional plastic insulation 4 "encasing them.” This further insulation system is applied consisting of a plastic layer 6 and a further layer 7. These are in turn enveloped by a metallic screen 8. Furthermore, each can The conductor may be enveloped by an outer jacket 29 for protection of the inducer 4.
  • the four electric cables 9 are also held together by a common, advantageously made of a durable plastic outer jacket 12.
  • the insulation systems 2, 3 and 6, 7 could each consist only of a single heat-resistant plastic layer and the outer shell 12 and the coats of the discharger can also be omitted under normal mechanical stress.
  • a common enclosing shield 13 may be provided around the already stranded initiator.
  • This multi-conductor cable 10 is characterized - as already mentioned - for the application of such a transfer of rectangular current, because it results with this significantly lower acoustic noise, and also the skin effect is optimally met, so that in the load condition of the cable at the same ambient and Load parameters lower temperatures can be maintained, which has a strong effect on improved aging properties, or it can be selected with the same power transmission a more compact cable.
  • Fig. 2 shows an electric cable 20 of a multi-conductor cable, not shown, said multi-conductor cable could be analogous to that of FIG. 1 as a four-conductor cable or even designed as a two-wire cable.
  • the insulation system between the inner conductor 1 and the counter conductor 4 is formed here from an inner semi-conductor layer 22a, a dielectric 22 and a semiconductor layer 23 surrounding the latter.
  • An inner semiconductor layer 25, a dielectric 26 and an outer semiconductor layer 27 form the outer insulation system.
  • the semiconductor layers can each consist of semiconducting tapes, graphite layers or an extruded material.
  • a single enveloping jacket 29 is still applied.
  • such conductor cables according to the invention can still be produced with additional layers in order to ensure their use even at higher voltages.
  • Semiconductor layers on the conductor, on the opposite polarity concentrically arranged outer conductor and on the screen would allow a more homogeneous distribution of the electric field. These would be realized accordingly from extruded semiconductor layers or applied semiconducting tapes.
  • An external shielding also allows the guidance of the protection potential and the shielding against electric fields.
  • the resulting construction has a large conductor surface, but the currents are distributed over several sub-conductors; this reduces the skin effect for the harmonics.
  • the concentric design also minimizes the radiation of magnetic fields to the outside to a minimum and the open twist of the electrical cables, i. without outer jacket 12, results in a larger surface and less contact resistance for the heat radiation.
  • Another advantage is the concentrated power delivery enabled by the design, which is optimally supported thanks to the larger surface area. Specifically, the smallest force per mass also results in the lowest acceleration and the smallest path amplitude, which in turn results in a lower noise level. The acoustic behavior is very important for rectangular currents, because the harmonics cause suggestions for disturbing noise emissions.

Landscapes

  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

L'invention concerne un câble multiconducteur pour la transmission de courants alternatifs de forme au moins approximativement rectangulaire, qui présente des câbles électriques (9) à un conducteur rassemblés en un câble à deux ou à quatre conducteurs. Ces câbles électriques (9) à un conducteur présentent chacun un conducteur intérieur (1) en fin fil flexible et un conducteur complémentaire (4) disposé concentriquement autour du conducteur intérieur (1) et formé de plusieurs conducteurs individuels. Un système (2, 3; 6, 7) d'isolation périphérique est chaque fois disposé entre le conducteur intérieur (1) et le ou les conducteurs complémentaires (4). On obtient ainsi les avantages d'une structure coaxiale de ces câbles à plusieurs conducteurs dans laquelle le conducteur intérieur et les conducteurs complémentaires présentent avantageusement exactement la même valeur de conductivité. Cela permet d'obtenir la meilleure compensation possible des champs émis.
EP06818452A 2005-11-11 2006-11-10 Cable multiconducteur pour la transmission de courants alternatifs de forme rectangulaire Ceased EP1946334A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01812/05A CH698074B1 (de) 2005-11-11 2005-11-11 Mehrleiterkabel für die Übertragung von rechteckig verlaufenden Wechselströmen.
PCT/EP2006/010775 WO2007054325A1 (fr) 2005-11-11 2006-11-10 Cable multiconducteur pour la transmission de courants alternatifs de forme rectangulaire

Publications (1)

Publication Number Publication Date
EP1946334A1 true EP1946334A1 (fr) 2008-07-23

Family

ID=37648389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06818452A Ceased EP1946334A1 (fr) 2005-11-11 2006-11-10 Cable multiconducteur pour la transmission de courants alternatifs de forme rectangulaire

Country Status (5)

Country Link
EP (1) EP1946334A1 (fr)
KR (1) KR20080066034A (fr)
CN (1) CN101305428B (fr)
CH (1) CH698074B1 (fr)
WO (1) WO2007054325A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101251980B1 (ko) * 2011-04-20 2013-04-08 엘에스전선 주식회사 복수의 동축 케이블이 연합된 복합 동축 케이블
WO2013052611A1 (fr) * 2011-10-04 2013-04-11 Lake Region Manufacturing, Inc. D/B/A Fil de guidage multiconducteur ou multipolaire
CH709972B1 (de) 2014-08-11 2018-12-14 Studer Christoph Elektrokabel.
FR3063829B1 (fr) * 2017-03-08 2021-05-21 Safran Aircraft Engines Cable electrodynamique compact pour propulsion de satellite en orbite de planetes possedant un champ magnetique
CN107808711A (zh) * 2017-11-13 2018-03-16 国网湖南省电力有限公司 一种变压器综合试验专用测试电缆

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE471379A (fr) * 1941-02-27
DE4004802A1 (de) * 1990-02-13 1991-08-14 Siemens Ag Elektrisches kabel mit tragorgan und zwei konzentrisch angeordneten leitern
CN2067451U (zh) * 1990-06-27 1990-12-12 王松田 爆炸性环境用控制电缆
FR2710447B1 (fr) * 1993-09-21 1995-11-10 Alcatel Cable Structure d'isolement pour câble.
CN2416574Y (zh) * 2000-03-28 2001-01-24 国营扬州市曙光电缆厂 新型无卤低烟阻燃电缆
CH695967A5 (de) * 2002-04-03 2006-10-31 Studer Ag Draht & Kabelwerk Elektrokabel.
CN1571075A (zh) * 2003-07-23 2005-01-26 新疆特变电工股份有限公司 一种电磁感应装置用双绕组电缆

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007054325A1 *

Also Published As

Publication number Publication date
CN101305428B (zh) 2013-04-24
CH698074B1 (de) 2009-05-15
CN101305428A (zh) 2008-11-12
KR20080066034A (ko) 2008-07-15
WO2007054325A1 (fr) 2007-05-18

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