EP2525370A1 - High frequency energy cable - Google Patents

High frequency energy cable Download PDF

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Publication number
EP2525370A1
EP2525370A1 EP11166236A EP11166236A EP2525370A1 EP 2525370 A1 EP2525370 A1 EP 2525370A1 EP 11166236 A EP11166236 A EP 11166236A EP 11166236 A EP11166236 A EP 11166236A EP 2525370 A1 EP2525370 A1 EP 2525370A1
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EP
European Patent Office
Prior art keywords
strands
cable
conductor
frequency
individual wires
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.)
Withdrawn
Application number
EP11166236A
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German (de)
French (fr)
Inventor
Peter Dr. Wallmeier
Bernd Niehaus
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.)
AEG Power Solutions GmbH
Original Assignee
AEG Power Solutions BV
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 AEG Power Solutions BV filed Critical AEG Power Solutions BV
Priority to EP11166236A priority Critical patent/EP2525370A1/en
Priority to US13/241,881 priority patent/US20120292075A1/en
Priority to CA2774345A priority patent/CA2774345A1/en
Priority to CN2012101506346A priority patent/CN102789839A/en
Priority to RU2012120094/07A priority patent/RU2012120094A/en
Priority to JP2012112896A priority patent/JP2012243770A/en
Publication of EP2525370A1 publication Critical patent/EP2525370A1/en
Withdrawn legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/006Constructional features relating to the conductors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/30Insulated conductors or cables characterised by their form with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect
    • H01B7/303Conductors comprising interwire insulation

Definitions

  • the present invention relates to a high-frequency power cable with a strand of electrically conductive individual wires and a jacket surrounding the individual wires as a conductor, each individual wire carries an insulating lacquer layer.
  • High-frequency currents are used in particular in high-frequency technology, in which high-frequency currents are used for signal transmission.
  • coaxial cables which have an inner conductor made of wire or stranded wire and an outer conductor made of a mesh.
  • a cable with an inner conductor made of stranded wire is known, for example, from the Swiss patent CH 205040 known.
  • the cable disclosed in the patent is suitable for transmitting powers of more than 100 kW at high voltages.
  • high-frequency (HF) wires are also used in which the individual wires are insulated from one another by a layer of varnish, although they lead to the same potential. This can reduce or eliminate the effect of the skin effect. The total cross section of the conductor used for the current transport can thereby be increased.
  • coaxial cables have been described with rigid conductors having a rigid inner conductor and a tube as the outer conductor.
  • the invention has for its object to propose a high-frequency energy cable, with the currents of 300 A to 1500 A possible Streufeldarm and low loss can be transmitted.
  • the high-frequency power cable has at least one pair of leads from which a stranded conductor and a stranded wire can be used as the return conductor and that the forward conductor and the return conductor of the stranded pair are bundled parallel to one another.
  • the strands of a strand pair are laid parallel.
  • the return and return conductors are brought together as closely as possible.
  • a plurality preferably a maximum of four pairs of strands can be bundled.
  • the bundle is preferably constructed so that it has a circular cross section as possible.
  • the heat generated in the strands may no longer be dissipated optimally and / or the proximity effect will become stronger again.
  • the forward conductors and return conductors are preferably connected to one another in an electrically conductive manner at the ends of the high-frequency energy cable according to the invention.
  • cable lugs are used which are soldered and / or pressed. It is particularly advantageous if all individual wires are included in this connection, since otherwise reduces the available for the conduction of the current cross-section.
  • a fabric hose is used as a mechanical protection.
  • the fabric hose prevents damage to the insulation.
  • the tube is preferably coarse mesh to allow ventilation to cool the strands.
  • the strands can have 2000 to 4000 individual wires.
  • the individual wires of the strands can have a cross section of 0.0157 mm 2 .
  • the individual wires of the strands can be twisted and / or knotted.
  • the cable is preferably designed for a current of 1 A to 1500 A.
  • the rated current results in a mean current density of up to 8 A / mm 2 .
  • a current conducted through the cable may have a frequency of 1 Hz to 150 kHz.
  • the high-frequency cable 1 has eight high-frequency strands 2, 3, 2 ', 3', 2 “, 3", 2 “', 3”' on the strand pairs 2, 3; 2 ', 3'; 2 ", 3”; 2 “', 3”' are summarized.
  • the high frequency strand consists of many individual wires 22 (eg 4000) insulated with varnish and braided so that each wire 22 covers each position in the strand 2, 3, 2 ', 3', 2 ", 3", 2 "'.
  • the current-carrying area is increased to counteract the negative effects of the skin effect and proximity effect
  • the stranded pairs 2, 3; 2 ', 3'; 2 ", 3"; 2 "', 3”' each comprise a strand, which is provided as a lead 2, 2 ', 2 ", 2"' and a stranded wire, which is provided as a return conductor 3, 3 ', 3 ", 3"'.
  • the forward conductor and the return conductor of a stranded pair are parallel to each other and as close to each other as possible, so that no large stray fields form and the resulting losses remain small.
  • the strands 2, 3, 2 ', 3', 2 ", 3", 2 “', 3”' are retracted into a coarse-meshed fabric tube, on the one hand a mechanical protection of the strands 2, 3, 2 ', 3', 2 “, 3", 2 “', 3”', in particular the sheaths 21 of the strands 2, 3, 2 ', 3', 2 ", 3", 2 "', 3”' and on the other hand by the mesh sufficient Draft allows for cooling the live parts.
  • Fabric tube 4 of the cable 1 are the four pairs of leads 2, 3; 2 ', 3'; 2 ", 3"; 2 ''', 3 "' bundled as possible.

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  • Insulated Conductors (AREA)

Abstract

The cable (1) has eight high-frequency strands (2, 3, 2', 3', 2'', 3'', 2''', 3''') made of electrically conducting individual wires (22) and a mantel (21) formed as a conductor and surrounding the individual wires. Each wire supports an insulating varnish layer, and a strand pair of one of the strands is designed as a feed conductor and a strand pair of another strand is designed as a return conductor. The feed and return conductors are connected with each other such that the feed and return conductors run parallel to each other. The individual wires have a cross-section of 0.0157 mm square.

Description

Die vorliegende Erfindung betrifft ein Hochfrequenzenergiekabel mit einer Litze aus elektrisch leitenden Einzeldrähten und einem die Einzeldrähte umgebenden Mantel als Leiter, wobei jeder Einzeldraht eine isolierende Lackschicht trägt.The present invention relates to a high-frequency power cable with a strand of electrically conductive individual wires and a jacket surrounding the individual wires as a conductor, each individual wire carries an insulating lacquer layer.

Hochfrequente Ströme finden insbesondere in der Hochfrequenztechnik Verwendung, in der hochfrequente Ströme zur Signalübertragung verwendet werden.High-frequency currents are used in particular in high-frequency technology, in which high-frequency currents are used for signal transmission.

Zur Übertragung hochfrequenter Signale werden überwiegend Koaxialkabel verwendet, die einen inneren Leiter aus Draht oder Litze und einen äußeren Leiter aus einem Geflecht aufweisen. Ein Kabel mit einem inneren Leiter aus Litze ist zum Beispiel aus der Schweizer Patentschrift CH 205040 bekannt. Das in der Patentschrift offenbarte Kabel ist für die Übertragung von Leistungen von mehr als 100 kW bei hohen Spannungen geeignet.To transmit high-frequency signals coaxial cables are predominantly used, which have an inner conductor made of wire or stranded wire and an outer conductor made of a mesh. A cable with an inner conductor made of stranded wire is known, for example, from the Swiss patent CH 205040 known. The cable disclosed in the patent is suitable for transmitting powers of more than 100 kW at high voltages.

In der Hochfrequenztechnik werden auch Hochfrequenzlitze (HF-Litze) verwendet, bei der die Einzeldrähte voneinander durch eine Lackschicht isoliert sind, obwohl sie gleiches Potential führen. Dadurch kann der Einfluss des Skin-Effekts verringert oder vermieden werden. Der für den Stromtransport verwendete Gesamtquerschnitt des Leiters kann dadurch erhöht werden.In high-frequency technology, high-frequency (HF) wires are also used in which the individual wires are insulated from one another by a layer of varnish, although they lead to the same potential. This can reduce or eliminate the effect of the skin effect. The total cross section of the conductor used for the current transport can thereby be increased.

Ferner sind Koaxialleitungen mit starren Leitern beschrieben worden, die einen starren inneren Leiter und ein Rohr als äußeren Leiter aufweisen.Further, coaxial cables have been described with rigid conductors having a rigid inner conductor and a tube as the outer conductor.

Es sind bisher keine Kabel bekannt, die hochfrequente Ströme mit großen Stromstärken von 300 A bis 1500 A leiten können.So far no cables are known which can conduct high-frequency currents with high currents of 300 A to 1500 A.

Hier setzt die Erfindung an.This is where the invention starts.

Der Erfindung liegt die Aufgabe zugrunde ein Hochfrequenzenergiekabel vorzuschlagen, mit dem Ströme von 300 A bis 1500 A möglichst streufeldarm und verlustarm übertragen werden können.The invention has for its object to propose a high-frequency energy cable, with the currents of 300 A to 1500 A possible Streufeldarm and low loss can be transmitted.

Diese Aufgabe wird dadurch gelöst, dass das Hochfrequenzenergiekabel wenigstens ein Litzenpaar aufweist, von dem eine Litze als Hinleiter und eine Litze als Rückleiter verwendbar ist und dass der Hinleiter und der Rückleiter des Litzenpaares parallel zueinander verlaufend gebündelt sind.This object is achieved in that the high-frequency power cable has at least one pair of leads from which a stranded conductor and a stranded wire can be used as the return conductor and that the forward conductor and the return conductor of the stranded pair are bundled parallel to one another.

Die Litzen eines Litzenpaares sind parallel gelegt. Damit sich keine großen Streufelder bilden und die Verluste klein bleiben, sind Hin- und Rückleiter so nah wie möglich zusammen geführt.The strands of a strand pair are laid parallel. In order to prevent the formation of large stray fields and keeping the losses low, the return and return conductors are brought together as closely as possible.

In einem Kabel können mehrere, vorzugsweise maximal vier Litzenpaare gebündelt werden. Das Bündel ist vorzugsweise so aufgebaut, dass es einen möglichst kreisförmigen Querschnitt hat.In a cable, a plurality, preferably a maximum of four pairs of strands can be bundled. The bundle is preferably constructed so that it has a circular cross section as possible.

Bei mehr als vier Litzenpaaren kann möglicherweise die in den Litzen umgesetzte Wirkleistung entstehende Wärme nicht mehr optimal abgeführt werden und/oder der Proximity-Effekt tritt wieder stärker auf.If there are more than four pairs of wires, the heat generated in the strands may no longer be dissipated optimally and / or the proximity effect will become stronger again.

Die Hinleiter und Rückleiter, insbesondere die Einzeldrähte sind vorzugsweise an den Enden des erfindungsgemäßen Hochfrequenzenergiekabels elektrisch leitend miteinander verbunden. Vorzugsweise werden Kabelschuhe verwendet, die gelötet und/oder verpresst sind. Von besonderem Vorteil ist, wenn alle Einzeldrähte in diese Verbindung einbezogen sind, da sich sonst der für die Leitung des Stroms zur Verfügung stehende Querschnitt reduziert.The forward conductors and return conductors, in particular the individual wires, are preferably connected to one another in an electrically conductive manner at the ends of the high-frequency energy cable according to the invention. Preferably, cable lugs are used which are soldered and / or pressed. It is particularly advantageous if all individual wires are included in this connection, since otherwise reduces the available for the conduction of the current cross-section.

Als mechanischer Schutz wird ein Gewebeschlauch verwendet. Der Gewebeschlauch verhindert Schäden an der Isolierung. Der Schlauch ist vorzugsweise grobmaschig, um eine Belüftung zur Kühlung der Litzen zu ermöglichen.As a mechanical protection, a fabric hose is used. The fabric hose prevents damage to the insulation. The tube is preferably coarse mesh to allow ventilation to cool the strands.

Die Litzen können 2000 bis 4000 Einzeldrähte aufweisen. Die Einzeldrähte der Litzen können einen Querschnitt von 0,0157 mm2 haben.
Die Einzeldrähte der Litzen können verdrillt und/oder gezopft sein.
The strands can have 2000 to 4000 individual wires. The individual wires of the strands can have a cross section of 0.0157 mm 2 .
The individual wires of the strands can be twisted and / or knotted.

Das Kabel ist vorzugsweise für einen Strom von 1 A bis 1500 A ausgelegt. Bei dem Bemessungsstrom ergibt sich eine mittlere Stromdichte von bis zu 8 A/mm2. Ein durch das Kabel geleiteter Strom kann eine Frequenz von 1 Hz bis 150 kHz haben.The cable is preferably designed for a current of 1 A to 1500 A. The rated current results in a mean current density of up to 8 A / mm 2 . A current conducted through the cable may have a frequency of 1 Hz to 150 kHz.

Ein Ausführungsbeispiel für ein erfindungsgemäßes Hochfrequenzenergiekabel ist anhand der Zeichnung beschrieben. Es zeigt die einzige

Figur
einen Querschnitt durch das erfindungsgemäße Hochfrequenzenergiekabel.
An embodiment of a high-frequency power cable according to the invention is described with reference to the drawing. It shows the only one
figure
a cross section through the high-frequency energy cable according to the invention.

Das erfindungsgemäße Hochfrequenzkabel 1 weist acht Hochfrequenzlitzen 2, 3, 2', 3', 2", 3", 2"', 3"' auf die zu Litzenpaaren 2, 3; 2', 3'; 2", 3"; 2"', 3"' zusammengefasst sind. Die Hochfrequenzlitze besteht aus vielen Einzeldrähten 22 (z.B. 4000), die mit Lack isoliert sind und so geflochten sind, dass jeder Draht 22 jede Stelle in der Litze 2, 3, 2', 3', 2", 3", 2"', 3''' gleich oft durchläuft. Durch die Verwendung der Litzen wird die stromführende Fläche vergrößert, um den negativen Folgen des Skin-Effekts und Proximity-Effekts entgegen zu wirken. Die Litze 2, 3, 2', 3', 2", 3", 2"', 3"' weist je nach geforderter Isolationsspannung einen Mantel 21 aus einem geeigneten Isoliermaterial auf.The high-frequency cable 1 according to the invention has eight high-frequency strands 2, 3, 2 ', 3', 2 ", 3", 2 "', 3"' on the strand pairs 2, 3; 2 ', 3'; 2 ", 3"; 2 "', 3"' are summarized. The high frequency strand consists of many individual wires 22 (eg 4000) insulated with varnish and braided so that each wire 22 covers each position in the strand 2, 3, 2 ', 3', 2 ", 3", 2 "'. By using the strands, the current-carrying area is increased to counteract the negative effects of the skin effect and proximity effect The strand 2, 3, 2 ', 3', 2 " , 3 ", 2" ', 3 "', depending on the required insulation voltage on a jacket 21 made of a suitable insulating material.

Die Litzenpaare 2, 3; 2', 3'; 2", 3"; 2"', 3"' umfassen jeweils eine Litze, die als Hinleiter 2, 2', 2", 2"' vorgesehen ist und eine Litze, die als Rückleiter 3, 3', 3", 3"' vorgesehen ist. Der Hinleiter und der Rückleiter eines Litzenpaares sind parallel zueinander und so nahe wie möglich zueinander geführt, damit sich keine großen Streufelder bilden und die daraus resultierenden Verluste klein bleiben.The stranded pairs 2, 3; 2 ', 3'; 2 ", 3"; 2 "', 3"' each comprise a strand, which is provided as a lead 2, 2 ', 2 ", 2"' and a stranded wire, which is provided as a return conductor 3, 3 ', 3 ", 3"'. The forward conductor and the return conductor of a stranded pair are parallel to each other and as close to each other as possible, so that no large stray fields form and the resulting losses remain small.

Die Litzen 2, 3, 2', 3', 2", 3", 2"', 3"' sind in einen grobmaschigen Gewebeschlauch eingezogen, der einerseits einen mechanischen Schutz der Litzen 2, 3, 2', 3', 2", 3", 2"', 3"', insbesondere der Mäntel 21 der Litzen 2, 3, 2', 3', 2", 3", 2"', 3"' bietet und andererseits durch die Maschen einen hinreichenden Luftzug zur Kühlung der stromführenden Teile ermöglicht. In dem Gewebeschlauch 4 des Kabels 1 sind die vier Litzenpaare 2, 3; 2', 3'; 2", 3"; 2''', 3"' möglichst rund gebündelt.The strands 2, 3, 2 ', 3', 2 ", 3", 2 "', 3"' are retracted into a coarse-meshed fabric tube, on the one hand a mechanical protection of the strands 2, 3, 2 ', 3', 2 ", 3", 2 "', 3"', in particular the sheaths 21 of the strands 2, 3, 2 ', 3', 2 ", 3", 2 "', 3"' and on the other hand by the mesh sufficient Draft allows for cooling the live parts. By doing Fabric tube 4 of the cable 1 are the four pairs of leads 2, 3; 2 ', 3'; 2 ", 3"; 2 ''', 3 "' bundled as possible.

Claims (7)

Hochfrequenzenergiekabel (1) mit einer Litze (2, 3, 2', 3', 2", 3", 2"', 3"') aus elektrisch leitenden Einzeldrähten (22) und einem die Einzeldrähte (22) umgebenden Mantel (21) als Leiter, wobei jeder Einzeldraht (22) eine isolierende Lackschicht trägt,
dadurch gekennzeichnet,
dass das Hochfrequenzenergiekabel (1) wenigstens ein Litzenpaar (2, 3, 2', 3', 2", 3", 2''', 3"') aufweist, von dem eine Litze (2, 3, 2', 3', 2", 3", 2''', 3"') als Hinleiter und eine Litze als Rückleiter verwendbar ist und
dass der Hinleiter und der Rückleiter des Litzenpaares (2, 3, 2', 3', 2", 3", 2"', 3"') parallel zueinander verlaufend gebündelt sind.
High-frequency power cable (1) with a stranded wire (2, 3, 2 ', 3', 2 ", 3", 2 "', 3"') of electrically conductive individual wires (22) and a jacket (21 ) as a conductor, each individual wire (22) carrying an insulating lacquer layer,
characterized,
in that the high-frequency energy cable (1) has at least one stranded pair (2, 3, 2 ', 3', 2 ", 3", 2 '", 3"'), of which one stranded strand (2, 3, 2 ', 3') ', 2 ", 3", 2''', 3 "') can be used as a lead and a strand as a return conductor, and
that the forward conductor and the return conductor of the stranded pair (2, 3, 2 ', 3', 2 ", 3", 2 "', 3"') are bundled parallel to one another.
Hochfrequenzenergiekabel (1) nach Anspruch 1 , dadurch gekennzeichnet, dass das Hochfrequenzenergiekabel (1) mehrere Litzenpaare (2, 3, 2', 3', 2", 3", 2"', 3"') aufweist, wobei die Litzenpaare (2, 3, 2', 3', 2", 3", 2"', 3"') parallel zueinander verlaufend gebündelt sind.High-frequency energy cable (1) according to claim 1, characterized in that the high-frequency power cable (1) has a plurality of pairs of leads (2, 3, 2 ', 3', 2 ", 3", 2 "', 3"'), wherein the pairs of strands ( 2, 3, 2 ', 3', 2 ", 3", 2 "', 3"') are bundled parallel to each other. Hochfrequenzenergiekabel (1) nach Anspruch 2, dadurch gekennzeichnet, dass an den Enden des Hochfrequenzkabels die Hinleiter (2, 2', 2", 2"') elektrisch leitend miteinander verbunden sind und die Rückleiter (3, 3', 3", 3"') elektrisch leitend miteinander verbunden sind.High-frequency power cable (1) according to claim 2, characterized in that at the ends of the high-frequency cable, the forward conductors (2, 2 ', 2 ", 2"') are electrically conductively connected to each other and the return conductors (3, 3 ', 3 ", 3 '') are electrically connected to each other. Hochfrequenzenergiekabel (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Litzen (2, 3, 2', 3', 2", 3", 2"', 3"') durch einen grobmaschigen Gewebeschlauch gebündelt sind.Radio-frequency energy cable (1) according to one of Claims 1 to 3, characterized in that the strands (2, 3, 2 ', 3', 2 ", 3", 2 "', 3"') are bundled by a coarse-meshed fabric tube. Hochfrequenzenergiekabel (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Litzen (2, 3, 2', 3', 2", 3", 2"', 3"') 2000 bis 4000 Einzeldrähte aufweisen.High-frequency energy cable (1) according to one of claims 1 to 4, characterized in that the strands (2, 3, 2 ', 3', 2 ", 3", 2 "', 3"') have 2000 to 4000 individual wires. Hochfrequenzenergiekabel (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Einzeldrähte der Litzen (2, 3, 2', 3', 2", 3", 2"', 3"') einen Querschnitt von 0,0157 mm2 haben.High-frequency energy cable (1) according to one of Claims 1 to 5, characterized in that the individual wires of the strands (2, 3, 2 ', 3', 2 ", 3", 2 "', 3"') have a cross section of 0, 0157 mm 2 have. Hochfrequenzenergiekabel (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Einzeldrähte der Litzen (2, 3, 2', 3', 2", 3", 2"', 3"') verdrillt und/oder gezopft sind.High-frequency energy cable (1) according to one of claims 1 to 6, characterized in that the individual wires of the strands (2, 3, 2 ', 3', 2 ", 3", 2 "', 3"') twisted and / or knotted are.
EP11166236A 2011-05-16 2011-05-16 High frequency energy cable Withdrawn EP2525370A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP11166236A EP2525370A1 (en) 2011-05-16 2011-05-16 High frequency energy cable
US13/241,881 US20120292075A1 (en) 2011-05-16 2011-09-23 High-power high-frequency cable
CA2774345A CA2774345A1 (en) 2011-05-16 2012-04-12 High-power high-frequency cable
CN2012101506346A CN102789839A (en) 2011-05-16 2012-05-15 High-power high-frequency cable
RU2012120094/07A RU2012120094A (en) 2011-05-16 2012-05-15 HIGH FREQUENCY POWER CABLE
JP2012112896A JP2012243770A (en) 2011-05-16 2012-05-16 High-frequency cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11166236A EP2525370A1 (en) 2011-05-16 2011-05-16 High frequency energy cable

Publications (1)

Publication Number Publication Date
EP2525370A1 true EP2525370A1 (en) 2012-11-21

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ID=44582063

Family Applications (1)

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EP11166236A Withdrawn EP2525370A1 (en) 2011-05-16 2011-05-16 High frequency energy cable

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US (1) US20120292075A1 (en)
EP (1) EP2525370A1 (en)
JP (1) JP2012243770A (en)
CN (1) CN102789839A (en)
CA (1) CA2774345A1 (en)
RU (1) RU2012120094A (en)

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CH709972B1 (en) * 2014-08-11 2018-12-14 Studer Christoph Electrical cable.
US11640861B2 (en) * 2021-05-10 2023-05-02 Te Connectivity Solutions Gmbh Power cable which reduces skin effect and proximity effect

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EP0821371A2 (en) * 1996-07-26 1998-01-28 Delco Electronics Corporation High frequency power cable
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EP2333788A2 (en) * 2009-12-11 2011-06-15 Showa Aircraft Industry Co., Ltd. High frequency electric wire

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US20120292075A1 (en) 2012-11-22
JP2012243770A (en) 2012-12-10
CN102789839A (en) 2012-11-21
CA2774345A1 (en) 2012-11-16
RU2012120094A (en) 2013-11-20

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