EP3298611A1 - Fester isolationswerkstoff, verwendung dazu und damit hergestelltes isolationssystem - Google Patents

Fester isolationswerkstoff, verwendung dazu und damit hergestelltes isolationssystem

Info

Publication number
EP3298611A1
EP3298611A1 EP16726050.4A EP16726050A EP3298611A1 EP 3298611 A1 EP3298611 A1 EP 3298611A1 EP 16726050 A EP16726050 A EP 16726050A EP 3298611 A1 EP3298611 A1 EP 3298611A1
Authority
EP
European Patent Office
Prior art keywords
material according
cas
insulation material
curing catalyst
medium
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Withdrawn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
EP16726050.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jürgen Huber
Dieter Schirm
Matthias ÜBLER
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.)
Flender GmbH
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP3298611A1 publication Critical patent/EP3298611A1/de
Withdrawn legal-status Critical Current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
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/40—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/50—Amines
    • C08G59/5046—Amines heterocyclic
    • C08G59/5053—Amines heterocyclic containing only nitrogen as a heteroatom
    • C08G59/5073—Amines heterocyclic containing only nitrogen as a heteroatom having two nitrogen atoms in the ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3442—Heterocyclic compounds having nitrogen in the ring having two nitrogen atoms in the ring
    • C08K5/3445—Five-membered rings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/30—Windings characterised by the insulating material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films

Definitions

  • the invention relates to a solid, in particular band-shaped insulating material, its use in a
  • a round propagating magnetic field is generated by time-selective energizing, which in the bore of the stator suspended and free-rotating rotor which, for example, due to a large number of applied permanent magnet reacts to the induced magnetic field in the form of forced rotation, drives and so electrical energy into kinetic energy umwan ⁇ delt.
  • the laminated core is electrically grounded, while the coils are at a high kilovolt potential.
  • Statornuten fitted coils must therefore be electrically isolated against ground potential.
  • each coil for example, with a special band, such as mica tape, multiple and defined-overlapped isolated.
  • Mica is preferably used, as it is particulate, in particular ⁇ special than platelet-shaped, inorganic
  • Mica tapes consist of mica paper and one or more carriers, eg fabric, foil (s), which are connected to each other via a tape adhesive. Mica tapes are necessary since mica paper alone does not have the mechanical strength necessary for an insulation process.
  • the tape adhesive additives may be added catalysts, for example, curing, which act initiating the thermal cure ei ⁇ nes externally applied impregnant: are after the insulated with mica tape reels fitted into the St Sblechpa ⁇ kete and electrically connected becomes the Ver ⁇ avoiding partial discharges during later operation eliminates the air in the cavities of the windings and in particular in the groove gaps of the stator core. Since this Ab ⁇ stand of energized, insulated coil to the laminated core is usually kept as small as possible, there field strengths of several kV / mm are not uncommon. Accordingly, the insulation material is claimed.
  • VPI vacuum pressure impregnation
  • these stators or coils are flooded so far as a whole with a low-viscosity epoxy resin Phtalklareanhydrid formulation in a vacuum chamber and then impregnated under pressure.
  • the final curing usually takes place under atmospheric pressure in the industrial furnace.
  • the curing catalyst has the function that the low-viscosity impregnating agent, made of epoxy resin and phthalic anhydride, gelled at a given temperature in a given time.
  • the industrial standard for this is hitherto as impregnating agent a mixture of distilled bisphenol A diglycidyl ether and methylhexahydrophthalic anhydride.
  • the curing catalyst is at least contained in the solid insulating material, eg mica tape.
  • This mica tape is held together via the tape adhesive, so it is essential that the tape adhesive and the curing catalyst are mutually inert. It is particularly advantageous if all three components, so ⁇ al tape adhesive, curing catalyst and acted
  • Impregnating react with each other only at the moment of the meeting during the VPI process. This achieves the best possible networking as well as the connection, compatibility and freedom from voids of the insulation, which in turn leads to an optimized service life of the "main insulation" of the electrical machine resulting from hardening.
  • Epoxy-based impregnants find use, which are polymerized using curing catalysts.
  • the new curing catalysts will be tailored to the anhydride-free impregnants. It will be strengthened
  • nitrogen heterocycles such as imidazoles
  • Bisphenol F diglycidyl ether which is gelled with 3% by weight of a prior art curing catalyst such as an N-alkyl substituted piperazine derivative and cured anionically-polymerizing at 145 ° C for 10 hours, only has a glass transition of about 90 ° C whereas the standard anhydride-containing epoxy resin and curing catalyst forms a glass transition of about 160 ° C. under identical curing conditions.
  • a prior art curing catalyst such as an N-alkyl substituted piperazine derivative and cured anionically-polymerizing at 145 ° C for 10 hours
  • 1,2-dimethylimidazole is used as the gelling and curing catalyst for an anhydride-free, epoxy resin-based impregnating resin, such as e.g. Bisphenol F diglycidyl ether, so sets a glass transition of up to 150 ° C.
  • epoxy resin-based impregnating resin such as e.g. Bisphenol F diglycidyl ether
  • a disadvantage of the imidazoles is that the vapor pressures of the imidazoles are relatively high at elevated temperatures, so that during long evacuation phases at elevated temperatures, as used in the manufacture of electrical machines prior to the vacuum impregnation of the stators for pre-drying, a partial expulsion from the mica tape binder is to be feared.
  • the object of the invention is therefore to provide a solid insulating material with a curing catalyst which overcomes the disadvantages of the prior art, in particular in connection with the use of anhydride-free impregnating resins.
  • it is an object of the present invention ⁇ ultimately to provide a use of the solid insulating material in a vacuum impregnation, and an electric machine with such an insulation system produced with an insert of the respiratory tract sensitizing Phtalcicreanhydride or organic acid anhydrides is generally avoided.
  • the solution to this problem and object of the present invention is therefore a solid insulating material, which can be used together with an anhydride-free impregnating agent for producing an insulation system in a Vakuumim Weggnier Anlagen, this a carrier, a
  • the curing catalyst and the tape adhesive are inert to each other, but under the conditions of vacuum impregnation with an anhydride impregnating agent with gel times of lh to 15h at the impregnation temperature abreagieren, wherein the curing catalyst is a covalently bridged di-imidazole derivative or a covalently-bridged di-pyrazole derivative.
  • electrical machines preferably in rotating electrical machines, particularly preferably in rotating electrical machines in the medium and high voltage range and in electrical switchgear, medium and high voltage applications, bushings, transformer bushings, generator bushings and / or HVDC -Durch Adjusten, as well as in corresponding semi-finished objects of the invention.
  • electrical machines preferably rotating electrical machines, more preferably rotary ⁇ de electrical machines in the medium and high voltage range and electrical switchgear, medium and high voltage applications, bushings, transformer bushings, generator bushings and / or HVDC bushings, as well as corresponding semi-finished, the one Such isolation system to ⁇ summarize the subject of the invention.
  • the curing catalyst is a di-imidazole or di-pyrazole of the general structure I and / or II
  • R 1, R 2, R 3 are alkyl and / or aryl radicals which may be branched or unbranched, cyclic or linear, with a number of carbon atoms of from 1 to 20, in particular from 1 to 12;
  • Suitable compounds can be prepared, for example, by condensation or addition of (alkyl) imidazoles or (alkyl) pyrazoles to electrophilic centers.
  • di-imidazoles and di-pyrazoles of the following (alkyl) imidazole or (alkyl) pyrazole educts have proven suitable: 1H-imidazole (CAS No. 288-32-4), ⁇ -2-methylimidazole ( CAS No. 693-98-1), ⁇ -2-ethylimidazole (CAS No. 1072-62-4), but also lH-pyrazole (CAS No. 288-3-1),
  • FIG. 1 shows the thermogravimetric analysis of the 1,2-
  • the 1, 1 ⁇ - carbonylbis (2-methyl) imidazole used here by way of example is also suitable as a curing catalyst for the technology in question because it is capable of producing even at low levels
  • FIG. 3 shows the heat flow measurement of a molding material produced according to the example described above. The glass transition temperature of a molding material cured with 3% by weight of 1,1 ⁇ -carbonylbis (2-methyl) imidazole in distilled bisphenol F-diglycidyl ether for 1 hour at 180 ° C. is shown.
  • a tape adhesive is in the presence of said covalently bridged di-imidazole derivatives and / or covalent bridged di-pyrazole derivatives as curing catalyst preferably a tape adhesive, as described in DE 102015205328.8 be ⁇ written , the disclosure content of which is hereby made to Schmidt ⁇ stand of the present description, used.
  • Tricyclomethanedimethanol (CAS Nos. 26896-48-0 and 26160-83-8),
  • Trimethylolpropane (CAS No. 77-99-6),
  • Polycaprolactone tetrols (CAS No. 35484-93-6) can be used as tape adhesive.
  • the tape adhesive connects the at least one carrier and the barrier material in the solid insulating material. It is contained in the solid insulating material in an amount in the range of 1 to 30% by weight, preferably 2 to 15% by weight, particularly preferably 5 to 10% by weight.
  • the carrier in the form of woven, such as glass fiber cloth, non-woven ( "non-woven"), such as non-woven, in particular a polyester fleece, Pa ⁇ pier and / or film before.
  • the carrier may be in form of a sheet also be perforated.
  • this carrier is in the solid insulating material of the, preferably particulate,
  • the barrier material is preferably at least partially platelet-shaped.
  • mica can be used as a barrier material.
  • a coated particulate barrier material is used. In particular, it may be a metal oxide coated
  • particulate barrier material for example, tin, zinc, titanium oxide coated particles act.
  • particulate in particular platelet-shaped
  • the tape adhesive connects the at least one carrier and the barrier material in the solid insulating material. It is contained in the solid insulating material in an amount in the range of 1 to 30% by weight, preferably 2 to 15% by weight, particularly preferably 5 to 10% by weight.
  • the curing catalyst is also called “strip-curing catalyst or” belt accelerator "in the solid insulating material in a concentration less than 10% by weight, for example from 0.001% to 7.5% by weight, preferably in the range of 0.01 to 5% by weight, more preferably from 0.1% by weight to 3.5% by weight, before, so that gel times of several hours can be realized.
  • the curing catalyst initiates the polymerization of the
  • Impregnating resin at temperatures in the range of 20 ° C to 100 ° C, preferably from 50 ° C to 80 ° C and particularly preferably from 55 ° C to 75 ° C.
  • the curing catalyst is relatively inert to the tape adhesive material.
  • This especially under the conditions of Vakuumvorhalte- and / or Impregnation temperature for example, in the range between 20 ° C and 100 ° C, in particular between 50 ° C to 80 ° C, most preferably between 55 ° C to 75 ° C.
  • Suitable as a bank adhesive for example, are diols, triols and / or polyols.
  • the invention relates to a solid, in particular band-shaped insulating material, its use in a
  • Vakuumim Weggnierbacter and an insulation system produced therewith and an electrical machine with the insulation system in particular for the medium and Hochputsbe ⁇ rich, namely for medium and high voltage machines, in particular rotating electrical machines in the medium and high ⁇ voltage range and semi-finished electrical Wennanla ⁇
  • the solid insulating material and the insulation system produced therewith are characterized in that it
  • Impregnating resins such as an N-alkyl-substituted piperazine derivative
  • the condensation products such as di-imidazole derivatives and / or di-pyrazole derivatives, in particular from imidazole, 2-methylimidazole and 2-ethylimidazole, particularly suitable compounds as curing catalysts, because
  • di-imidazoles can be further modified in a targeted manner, e.g. Properties such as hydrolysis resistance.
  • Anhydride-free impregnating resins based on epoxy resin in comparison to simple (alkyl) imidazoles not or negligibly negatively affected.
  • these systems are excellent curing catalysts of acid anhydride free epoxy based impregnating resins.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Bodies (AREA)
  • Organic Insulating Materials (AREA)
  • Adhesives Or Adhesive Processes (AREA)
EP16726050.4A 2015-07-17 2016-05-20 Fester isolationswerkstoff, verwendung dazu und damit hergestelltes isolationssystem Withdrawn EP3298611A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102015213534 2015-07-17
DE102015213815.1A DE102015213815A1 (de) 2015-07-17 2015-07-22 Fester Isolationswerkstoff, Verwendung dazu und damit hergestelltes Isolationssystem
PCT/EP2016/061390 WO2017012739A1 (de) 2015-07-17 2016-05-20 Fester isolationswerkstoff, verwendung dazu und damit hergestelltes isolationssystem

Publications (1)

Publication Number Publication Date
EP3298611A1 true EP3298611A1 (de) 2018-03-28

Family

ID=57630113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16726050.4A Withdrawn EP3298611A1 (de) 2015-07-17 2016-05-20 Fester isolationswerkstoff, verwendung dazu und damit hergestelltes isolationssystem

Country Status (7)

Country Link
US (1) US10522265B2 (zh)
EP (1) EP3298611A1 (zh)
CN (1) CN107851481B (zh)
BR (1) BR112018000459A2 (zh)
DE (1) DE102015213815A1 (zh)
RU (1) RU2687404C1 (zh)
WO (1) WO2017012739A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020239309A1 (de) 2019-05-28 2020-12-03 Siemens Aktiengesellschaft Additiv, verwendung dazu, isolationssystem und elektrische maschine
WO2021043541A1 (de) 2019-09-04 2021-03-11 Siemens Aktiengesellschaft Bandbeschleuniger und verwendung davon, fester isolationswerkstoff und anhydrid-freies isolationssystem

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015213815A1 (de) 2015-07-17 2017-01-19 Siemens Aktiengesellschaft Fester Isolationswerkstoff, Verwendung dazu und damit hergestelltes Isolationssystem
DE102016203867A1 (de) 2016-03-09 2017-09-14 Siemens Aktiengesellschaft Fester Isolationswerkstoff, Verwendung dazu und damit hergestelltes Isolationssystem
DE102017201498A1 (de) * 2017-01-31 2018-08-02 Siemens Aktiengesellschaft Wickelbandisoliersystem für elektrische Maschinen, Verwendung dazu sowie elektrische Maschine
EP3389058A1 (de) * 2017-04-10 2018-10-17 Siemens Aktiengesellschaft Glimmschutzband für elektrische hochspannungsmaschine
DE102017008925A1 (de) 2017-09-25 2019-03-28 Hexion GmbH Imprägnierharzmischung
EP3716290A1 (de) * 2019-03-28 2020-09-30 Siemens Aktiengesellschaft Formulierung für ein isolationssystem, isolationssystem daraus und elektrische maschine mit isolationssystem

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JP3343443B2 (ja) * 1994-07-04 2002-11-11 松下電器産業株式会社 樹脂組成物およびプリプレグ
KR20070027583A (ko) 2004-06-16 2007-03-09 이조볼타 에이지 운모 함량이 최대화된 마이카 테이프
JP4893085B2 (ja) * 2006-04-26 2012-03-07 株式会社日立製作所 電気絶縁線輪、全含浸コイルおよびこれらを用いた回転電機
EP1978049B1 (en) * 2007-04-03 2010-02-24 ABB Research Ltd Curable Epoxy Resin Composition
KR101807194B1 (ko) * 2011-07-29 2017-12-08 에이비비 리써치 리미티드 경화성 에폭시 수지 조성물
CN102942682A (zh) * 2012-11-02 2013-02-27 华东理工大学 双咪唑烷烃类环氧树脂固化剂
JP6161340B2 (ja) * 2013-03-14 2017-07-12 株式会社Adeka ビスイミダゾール化合物、該ビスイミダゾール化合物を含有するエポキシ樹脂用硬化剤及び該エポキシ樹脂用硬化剤を含有する一液型硬化性エポキシ樹脂組成物
CN103440902B (zh) * 2013-08-29 2016-01-20 苏州巨峰电气绝缘系统股份有限公司 适用于纯环氧vpi绝缘树脂的高透气性少胶云母带及其制备方法
DE102014000992A1 (de) * 2014-01-29 2015-07-30 Alzchem Ag Flüssige Härterzusammensetzung zur Härtung von Polymerharzen (I)
WO2015113931A1 (de) 2014-01-29 2015-08-06 Alzchem Ag Flüssige härterzusammensetzung zur härtung von polymerharzen (ii)
DE102014219844A1 (de) 2014-09-30 2016-03-31 Siemens Aktiengesellschaft Isolationssystem für elektrische Maschinen
DE102014221715A1 (de) 2014-10-24 2016-04-28 Siemens Aktiengesellschaft Tränkharz, Leiteranordnung, elektrische Spule und elektrische Maschine
DE102015204885A1 (de) 2015-03-18 2016-09-22 Siemens Aktiengesellschaft Isolationssystem, Verwendungen dazu, sowie elektrische Maschine
DE102015205328A1 (de) 2015-03-24 2016-09-29 Siemens Aktiengesellschaft Bandkleber für ein Isolierband in einem Isolationssystem und Isolationssystem
DE102015213815A1 (de) 2015-07-17 2017-01-19 Siemens Aktiengesellschaft Fester Isolationswerkstoff, Verwendung dazu und damit hergestelltes Isolationssystem
DE102016203867A1 (de) * 2016-03-09 2017-09-14 Siemens Aktiengesellschaft Fester Isolationswerkstoff, Verwendung dazu und damit hergestelltes Isolationssystem

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020239309A1 (de) 2019-05-28 2020-12-03 Siemens Aktiengesellschaft Additiv, verwendung dazu, isolationssystem und elektrische maschine
WO2021043541A1 (de) 2019-09-04 2021-03-11 Siemens Aktiengesellschaft Bandbeschleuniger und verwendung davon, fester isolationswerkstoff und anhydrid-freies isolationssystem

Also Published As

Publication number Publication date
RU2687404C1 (ru) 2019-05-13
WO2017012739A1 (de) 2017-01-26
US10522265B2 (en) 2019-12-31
CN107851481A (zh) 2018-03-27
BR112018000459A2 (pt) 2018-09-11
DE102015213815A1 (de) 2017-01-19
CN107851481B (zh) 2019-08-16
US20180204650A1 (en) 2018-07-19

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