WO2006084828A1 - Bande isolante thermoconductrice - Google Patents

Bande isolante thermoconductrice Download PDF

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Publication number
WO2006084828A1
WO2006084828A1 PCT/EP2006/050671 EP2006050671W WO2006084828A1 WO 2006084828 A1 WO2006084828 A1 WO 2006084828A1 EP 2006050671 W EP2006050671 W EP 2006050671W WO 2006084828 A1 WO2006084828 A1 WO 2006084828A1
Authority
WO
WIPO (PCT)
Prior art keywords
thermally conductive
corona
carrier
electrically insulating
fabric
Prior art date
Application number
PCT/EP2006/050671
Other languages
German (de)
English (en)
Inventor
Jürgen Huber
Walter Fischer
Peter GRÖPPEL
Volker Muhrer
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2006084828A1 publication Critical patent/WO2006084828A1/fr

Links

Classifications

    • 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/2813—Protection against damage caused by electrical, chemical or water tree deterioration

Definitions

  • the invention relates to a thermally conductive insulating tape, in particular an anti-corrosive tape that can be used as a sub-conductor and / or main insulator to protect against overvoltage and / or breakdown of an electric motor, a high voltage machine and / or a (high voltage) generator.
  • Such an insulating tape and / or corona protective tape is used for example in an electrical machine, for example in a high-voltage machine and / or generator as an insulator and wound around the electrical conductor, which is isolated therewith. It is about an electric machine, which usually has a stand with a laminated core and a rotor, wherein in at least one preformed groove, at least one insulated winding is inserted and rotates in operation, the rotor in the stator.
  • a corona shield is usually constructed so that a carrier with a mica is connected by an adhesive.
  • the thermal conductivity of commonly used, for example impregnated with epoxy, corona protection tape, the glass or polyester fabric as a carrier, is approx. 0, 2 - 0, 25 W / mK at room temperature.
  • the carrier used is generally a fabric made of glass and / or polyester, usually with an inherent thermal conductivity of approx. 1 resp. 0, 25 W / mK.
  • Von Roll Isola (Von Roll Isola Holding Ltd, Edenstrasse 20, CH-8045 Zurich) has an anti-corrosive tape on the market which, in addition to the conventional structure, has a carrier, mica and adhesive with a boron nitride-containing layer.
  • the object of the invention is therefore to improve the thermal conductivity of a corona protective tape to reduce the thermal load on the insulation and / or to operate at the same dimensions / thickness of the corona shielding an electric machine, a high-performance machine, a motor and / or a generator with higher power ,
  • the invention relates to an antiglare protective tape which has at least one carrier and at least one mica component, both connected by at least one adhesive, wherein the carrier comprises at least a portion of a thermally conductive and electrically insulating material.
  • the inherent thermal conductivity of the carrier / tissue forming the carrier is increased.
  • the increase in the thermal conductivity of the carrier is effected in particular by the choice of the material, the material mixture or the tissue composition of the carrier.
  • the support is therefore preferably added to at least one fraction of highly thermally conductive material, more preferably highly heat-conductive and isotropically heat-conductive material, such as alumina, boron nitride, diamond, silicon oxide, coated aluminum nitride, quartz powder, and / or aluminum nitride, as well as any desired mixtures or mixtures thereof - the latter means that one of the components is ner other, not explicitly mentioned here chemical component, for example, for better storage, incorporation into the tissue, etc., is present as a mixture.
  • highly thermally conductive material more preferably highly heat-conductive and isotropically heat-conductive material, such as alumina, boron nitride, diamond, silicon oxide, coated aluminum nitride, quartz powder, and / or aluminum nitride, as well as any desired mixtures or mixtures thereof - the latter means that one of the components is ner other, not explicitly mentioned here chemical component, for example, for better storage, incorporation into the tissue, etc., is present as
  • Aluminum oxide is characterized by an isotropic thermal conductivity of approx. 25 W / mK off. As a result, compared with the prior art, significantly increased thermal conductivity of the corona-blast protective strip produced therewith can be achieved. At the same time it represents an excellent electrical insulator.
  • a carrier which comprises, in whole or in part, a material which has a significantly higher inherent thermal conductivity.
  • a carrier a tissue that has at least alumina shares.
  • Alumina has an inherent thermal conductivity of approx. 25 W / mK on. Accordingly, the thermal conductivity of a fabric comprising alumina fiber is significantly higher than a fabric without alumina and / or exclusively, or at least a major proportion of glass and / or polyester.
  • suitable carriers are tissues whose proportion of heat-conducting and electrically insulating material, ie, for example, their aluminum oxide content in the individual fibers of the tissue forming the carrier, is between 30 and 100%.
  • the remaining proportion of fabric fiber includes, for example, silicon dioxide (SiC> 2) and / or a borosilicate glass such as an E-glass, such.
  • SiC> 2 silicon dioxide
  • borosilicate glass such as an E-glass
  • a tissue is considered, whose warp and / or weft comprises different fibers, wherein at least a proportion of alumina-containing or otherwise highly heat-conducting and electrically insulating fiber is contained.
  • the carrier is present as a tissue material, which accounts for between 20 and 100%. % By weight of aluminum oxide.
  • the remainder of the fabric is for example made of one or more other materials such as E-glass, SiC> 2 and / or polyester.
  • the aluminum oxide is present in the corona protection strip in an amount of from 5 to 70% by weight, preferably from 10 to 50% by weight, particularly preferably from 15 to 45% by weight.
  • the fabric is made with at least one of the following compounds and / or any combination or mixture with at least one of the compounds: boron nitride, aluminum oxide, diamond
  • thermally conductive fillers or filler mixtures can be used according to the invention.
  • the thermally conductive and electrically insulating material is, for example, in the form of a filler, for example as a bi- or multimodal filler mixture, added to the carrier material, but it can also be on any other, not explicitly mentioned here, but admitted to the expert entrusted with fillers and filler incorporation specialist well known type of carrier and / or the carrier material added.
  • Preferred particle sizes (average particle size, non-maximum particle size) of suitable fillers are, for example, in the range from 1 to 50 ⁇ m, it being possible for the particle sizes to vary depending on the mesh size of the fabric.
  • the thermally conductive and electrically insulating material can also be added in the form of nanoparticles, that is to say particles with particle sizes in the nanometer range.
  • these particle sizes are not obtained by means of debris or filtration processes, but rather in work processes specially developed for the production of nanoparticles, such as film or film deposition of the solids or the like. These particles can only be detected by electron microscopy.
  • the nanoparticles are rod-shaped with average approximate dimensions of 1 to 10 nm in diameter and up to 500 nm in length.
  • alumina-containing fabric as a carrier of the corona protection strip in the sub-conductor and the main insulation of generators and motors whose thermal conductivity to values above 0, 5 W / mK to increase without negatively affecting the electrically insulating properties.
  • Figure 1 shows a cross section through a corona shielding tape according to an embodiment of the invention and Figure 2 shows the plan view of the embodiment.
  • the lowest layer is a schematic indication of the current-carrying cable 4, for example a copper cable, above which the carrier layer of the corona protection strip in the form of a woven fabric 1 consists of individual, overlying fibers.
  • the fibers according to the invention have at least a portion of a heat-conducting and electrically insulating material, for example a proportion of aluminum oxide in the range between 20 and 100% by weight.
  • the fibers of the fabric 1 are over individual adhesive dots 2 on the mica part 3 of the corona shielding tape, a layered silicate with preferably positive charges on the surface of the individual, the mica building phyllosilicate sections, so that an electrical breakdown of the current-carrying cable 4 is prevented.
  • Figure 2 shows a plan view of the embodiment of the corona shielding tape, wherein again selectively the adhesive 2 can be seen, through which the fabric 1 with the mica, which is not extra to see because of the top view from the perspective of the current-carrying cable.
  • the adhesive 2 may comprise, for example, an epoxy resin.
  • the alumina-containing fabric as the support of the corona protection tape is connected in a conventional method with mica, for example in the form of mica paper and an adhesive.
  • mica for example in the form of mica paper and an adhesive.
  • no further thermally conductive and / or electrically insulating materials were added.
  • Tissue fiber composition 38% SiC> 2 and 62% AI2O 3 Thermal conductivity at RT: 0, 56 W / mK
  • tissue fiber composition 0% SiC> 2 and 100% AI2O 3
  • Fiber 1 38% SiO 2 -GlS
  • Fiber 2 62% Al 2 O 3
  • Corona protection strips according to the invention can be used and processed as usual in the known electrical machines, it being possible to take account of the improved properties (eg increased thermal conductivity) in the structural design.
  • a laminated core of such a machine has a certain number of stacked individual sheets, are punched into the grooves.
  • the stator winding is inserted, which is coated depending on the requirement with a specific insulation system.
  • the so-called main insulation consists of mica tapes wrapped around the conductor.
  • AGS electrically good conducting external corona protection
  • the external corona protection is led out over the laminated core to prevent partial discharges in this area due to the small distances between the pressure plates and pressure fingers.
  • VPI process Impregnation process
  • the windings are impregnated with a impregnating resin and cured.
  • the invention relates to a thermally conductive insulating tape, in particular an anti-corrosive tape that can be used as a sub-conductor and / or main insulator to protect against overvoltage and / or breakdown of an electric motor, a high voltage machine and / or a (high voltage) generator.
  • the thermal conductivity of the corona-shielding strip is increased by at least adding aluminum oxide and / or another thermally conductive and electrically insulating component to the support in the corona-shielding tape. If appropriate, the support is also made entirely of aluminum oxide.
  • Aluminum oxide is characterized by an isotropic thermal conductivity of approx. 25 W / mK off. As a result, a significantly better thermal conductivity of the insulation can be achieved. At the same time it represents an excellent electrical insulator.

Landscapes

  • Insulating Bodies (AREA)

Abstract

L'invention concerne une bande d'isolation thermoconductrice, en particulier une bandes à dispositif antieffluves, qui peut être utilisée comme conducteur et/ou isolant principal permettant de protéger d'une surtension et/ou d'une rupture d'un moteur électrique, d'une machine haute-tension et/ou d'un générateur haute-tension.
PCT/EP2006/050671 2005-02-08 2006-02-06 Bande isolante thermoconductrice WO2006084828A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005005784 2005-02-08
DE102005005784.5 2005-02-08

Publications (1)

Publication Number Publication Date
WO2006084828A1 true WO2006084828A1 (fr) 2006-08-17

Family

ID=36143695

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/050671 WO2006084828A1 (fr) 2005-02-08 2006-02-06 Bande isolante thermoconductrice

Country Status (1)

Country Link
WO (1) WO2006084828A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014012576A1 (de) * 2014-08-29 2016-03-03 Heidelberger Druckmaschinen Ag Umspritzer Stecker in Schichtbauweise für Elektroautos

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995002504A1 (fr) * 1993-07-14 1995-01-26 Chomerics, Inc. Materiaux thermoconducteurs contenant du diborure de titane comme charge
EP0790623A1 (fr) * 1994-08-15 1997-08-20 GENERAL ELECTRIC CANADA, Inc. Isolation sandwich pour une résistance améliorée à l'effet corona
EP1486997A1 (fr) * 2003-06-11 2004-12-15 Mitsubishi Denki Kabushiki Kaisha Procédé de fabrication d'isolation d'enroulement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995002504A1 (fr) * 1993-07-14 1995-01-26 Chomerics, Inc. Materiaux thermoconducteurs contenant du diborure de titane comme charge
EP0790623A1 (fr) * 1994-08-15 1997-08-20 GENERAL ELECTRIC CANADA, Inc. Isolation sandwich pour une résistance améliorée à l'effet corona
EP1486997A1 (fr) * 2003-06-11 2004-12-15 Mitsubishi Denki Kabushiki Kaisha Procédé de fabrication d'isolation d'enroulement

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BRUTSCH R ET AL: "New high voltage insulation with increased thermal conductivity", ELECTRICAL ELECTRONICS INSULATION CONFERENCE AND ELECTRICAL MANUFACTURING & COIL WINDING CONFERENCE, 1993. PROCEEDINGS., CHICAGO '93 EEIC/ICWA EXPOSITION CHICAGO, IL, USA 4-7 OCT. 1993, NEW YORK, NY, USA,IEEE, 4 October 1993 (1993-10-04), pages 323 - 327, XP010246550, ISBN: 0-7803-0847-6 *
TARI M ET AL: "A high voltage insulating system with increased thermal conductivity for turbo generators", PROCEEDINGS OF THE ELECTRICAL INSULATION CONFERENCE AND ELECTRICAL MANUFACTURING AND COIL WINDING CONFERENCE. (COMBINED CONFERENCE). INDINAPOLIS, IN, SEPT. 23 - 25, 2003, PROCEEDINGS OF THE ELECTRICAL ELECTRONICS INSULATION CONFERENCE AND ELECTRICAL, 23 September 2003 (2003-09-23), pages 613 - 618, XP010670722, ISBN: 0-7803-7935-7 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014012576A1 (de) * 2014-08-29 2016-03-03 Heidelberger Druckmaschinen Ag Umspritzer Stecker in Schichtbauweise für Elektroautos

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