CN1662462A - Corona shield - Google Patents
Corona shield Download PDFInfo
- Publication number
- CN1662462A CN1662462A CN 03814412 CN03814412A CN1662462A CN 1662462 A CN1662462 A CN 1662462A CN 03814412 CN03814412 CN 03814412 CN 03814412 A CN03814412 A CN 03814412A CN 1662462 A CN1662462 A CN 1662462A
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- CN
- China
- Prior art keywords
- corona discharge
- shield cap
- discharge shield
- glass
- electroconductibility
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- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/003—Conducting or semi-conducting fibres
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Glass Compositions (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention relates to a corona shield of an electrical machine, which is embodied as a fibrous tile or as a stringy tissue. Said fibers or strings are provided with at least one electrically conductive inorganic material.
Description
The present invention relates to a kind of corona discharge shield cap that is used for motor.This corona discharge shield cap has a fabric or a non-woven fabrics mostly.
This fabric is for example open by Deutsche Industry Norm DIN 16740 and DIN 16741 in 1976.Wherein, DIN 16740 discloses a kind of woven glass fabric that is used for electronic application field, and DIN 16741 then discloses the multiple woven glass fabric wall that is used for having of electronic application field of firm flanging (Wegkanten).This fabric for example as the carrier of soaker, wherein, can obtain certain electrical characteristic by this soaker.For example can form a kind of corona discharge protection by dipping.
This corona discharge protective layer for example also can form by a kind of chemical reduction method.This has corresponding record in american documentation literature US 3 639 113.
When making the corona discharge shield cap, for example adopt a kind of nonconducting glass fabric as basic material.This textile impregnation of being made by inorganic materials is in a kind of solvent.The branch that external electric corona protection (abbreviating AGS as) and end corona discharge protection (abbreviating EGS as) are arranged in the corona discharge protection.When EGS be adopt silicon carbide (SiC) and a kind of organic bond as resin and as described in glass fabric constitute as described in the corona discharge shield cap.For forming AGS, then adopt described glass fabric and carbon black and/or graphite and a kind of organic bond such as resin to make.Adopt the shortcoming of organic bond to be that this wedding agent can only bear less thermal load.Thermal load can change the position of the electro-conductive material in the wedding agent, thereby can change electroconductibility.Contact between electro-conductive material (SiC, carbon black, graphite) can lose and/or reduce, and consequently reduces electroconductibility.
For example the disclosed a kind of shortcoming that forms the corona discharge protection by chemical reduction reaction of american documentation literature US 3 639 113 is to carry out reduction reaction.In addition disadvantageously, an extexine at the corona discharge shield cap can produce electroconductibility.Therefore can not adopt the whole transverse section of described corona discharge shield cap to realize conductivity.Usually struck in some grooves of this motor owing to have the conductor wire of corona discharge protective casing layer on its of a motor, therefore may be damaged the extexine of described corona discharge protective casing layer.Because have only the extexine conduction of corona discharge shield cap now, therefore the electroconductibility of described corona discharge shield cap will weaken undesirably.
The technical problem to be solved in the present invention is to provide a kind of corona discharge shield cap that is used for motor, and its electrical characteristic can be recovered and/or have longer work-ing life again.
Above-mentioned technical problem solves like this according to the present invention, promptly, a kind of corona discharge shield cap that is used for motor is designed to the non-woven fabrics that a fabric that is made into by silk thread and/or is made by fiber, and wherein, described silk thread and/or fiber have the inorganic materials of a conduction.
Described fiber and/or silk thread are made with the inorganic materials of conduction whole or in part.Can select material and/or combination of materials according to desired electroconductibility.
According to a kind of favourable mode, described fiber and/or silk thread have glass.The electroconductibility of this fiber and/or silk thread for example can form by some transition metal oxides as conducting inorganic material.Such transition metal for example has iron, vanadium, manganese, chromium, cobalt, nickel, copper, arsenic and antimony.The concentration of conducting inorganic material depends on desired electroconductibility.About concentration of 5% to 35% is an example that can be used for forming the concentration range of electroconductibility.According to the electroconductibility of employing transition metal oxide, also other concentration ranges can be arranged.Adopting under the situation of iron as conducting inorganic material, can adopt following two kinds of compound: FeO and Fe
2O
3
The electrical characteristic of described corona discharge shield cap mainly are subjected to the influence of the electrical characteristic of its material that is used to make fabric or non-woven fabrics.This fiber and/or silk thread material are more advantageously made by the inorganic materials with certain density conducting inorganic material.This conducting inorganic material is compared with the conduction organic materials in being used in the corona discharge shield cap so far so inresponsive aspect the shelf depreciation.Though the ozone that produces during shelf depreciation can with carbon black and graphite action-reaction, can not influence inorganic materials and mineral compound to a great extent.Carbon black and ozone reaction can form carbon monoxide or carbonic acid gas, thereby can reduce electroconductibility.
If adopt carbon black according to prior art for forming electroconductibility, so especially manipulate this corona discharge shield cap according to prior art during, carbon black has wearing and tearing.This has changed electroconductibility again unfriendly.A kind of so disadvantageous abrasion do not exist in corona discharge shield cap of the present invention.Therefore, even if for example in a motor, twine during the insulated line, also can improve the property manipulated of material.Like this, when making motor and correspondingly twining the lead that has this corona discharge protective layer, whether easily impaired, reach time saving purpose thus during fabrication if just need not to pay close attention to described corona discharge protective casing layer too much.Another shortcoming according to the corona discharge shield cap of prior art is, though the corona discharge protective casing layer that remains to be coated on the insulated line of a motor hardens also impermanent sclerosis to some extent.In the dipping operation of motor (that is abbreviate as VPI vacuum pressure impregnation), can be influential to impermanent hardened corona discharge protective casing layer.Can change the electroconductibility of the corona discharge shield cap of prior art thus unfriendly.For corona discharge shield cap of the present invention, its electroconductibility can not be subjected to the influence of VPI operation.
Described corona discharge protective casing layer especially can be used for insulation protection voltage kilovolt level (especially more than or equal to 3.3 kilovolts) such as electric motor (for example rail traction electric motor) and the such motor of generator (especially turbo-generator).During greater than 3.3 kilovolts, then must take to avoid the preventive measures of shelf depreciation or corona discharge and CONTROLLED POTENTIAL at institute's on load voltage.For this reason, the slot area in a laminated core of a motor will be taked inside and outside corona discharge safeguard procedures, then will take terminal corona discharge safeguard procedures at winding overhang.
As the corona discharge protective casing layer, such as already mentioned in the prior art, the general fabric or the nonwoven fabric belts of making by glass or polyester that also flood that adopt with a kind of wedding agent that contains stopping composition.When dipping single conductor bar, also can partly adopt the coating that contains filler.In slot area, generally adopt carbon black or graphite as conductive filler material, then adopt the silicon carbide of characteristic of semiconductor in end winding region.But these materials are owing to be subjected to the influence of essential organic bond can only bear limited thermal load (the highest be about 180 ℃), and very fast meeting is destroyed by shelf depreciation or corona discharge.In addition, its electroconductibility is subjected to the influence of VPI dipping operation in unforeseen mode.By abrasion and flushing, described VPI soaker and adjacent insulating regions may be infected with by conductive filler material.
Corona discharge protective casing layer of the present invention for example can be designed to webbing or nonwoven fabric belts.This band can be made by the continuous fibre or the staple fibers of conduction.Necessary electroconductibility (the 5*10 of inside and outside corona discharge protective layer
2Ω to 5*10
4Ω) and the necessary electroconductibility (5*10 of end corona discharge protective layer
7Ω to 10
9Ω), that is to say by the different concns of described electro-conductive material/materials/compounds in described fiber or silk thread and realize by carrying out different doping.Fiber of Gou Chenging or silk thread have intrinsic (intrinsische) electroconductibility like this.
Glass with inherent electronic conductance not only can be used for end corona discharge protection but also can be used for external electric corona protection.The typical electric conductivity of this end corona discharge protective layer for example is approximately 1.5*10
5Ω to 1.6*10
6Ω.A kind of like this glass is suitable for making with common device the continuous fibre of common thickness (2 to 50 microns).Certainly also can be made into other thickness.Described electroconductibility for example by adding the multivalence composition, realize by preferred ferriferous oxide.This ferriferous oxide in glass as Fe
2+And Fe
3+There is and passes through " busy move (hopping) " mechanism realization inherent electroconductibility of electronics.The amplitude of fluctuation of this electroconductibility is preferably less than 2 times.
Described glass can be by adding iron cpd such as Fe in frit
2O
3, FeCO
3Or Fe
3O
4Melting forms.Especially to notice guaranteeing that at this some working conditions can reappear.Could form a Fe who determines like this
2+/ Fe
3+Ratio.Described electroconductibility depends primarily on this ratio.
What need clearly demonstrate is that described glass with conducting inorganic material contains for example a kind of ferriferous oxide, copper oxide or other transition metal oxides.If a kind of glass has such oxide compound, just represent that also it contains such oxide compound.Aspect glass chemistry, especially when describing the composition of glass, to adopt the oxide compound describing mode.For example when a kind of glass has ferriferous oxide, iron in glass for example just with Fe
2+And Fe
3+Ionic forms exist.
The glass that has intrinsic electronic conductance also can be used for external electric corona protection (AGS).At this moment, especially a typical specific conductivity between 0.03 to 0.5 Ω is very important for the glass of this purposes.A kind of like this glass also is suitable for making with common technique equipment the continuous fibre of common thickness (10 to 20 microns) for making external electric corona protective casing layer as for making end corona discharge protective casing layer.Compare with the material that is used for end corona discharge protection, the electroconductibility of this material will exceed about 5 orders of magnitude.This means that the concentration of multivalence composition obviously increases.But according to a kind of favourable expansion design, this electroconductibility also can be used for realizing by partial crystallization.
Some conditional requests that glass as the protection of end corona discharge is suitable for are applicable to the glass that protects as the external electric corona too.Therefore, the ratio that must select the glass of various series very carefully and regulate oxide compound/reduzate.
Oxygen quality test in the relevant glass melt is applicable to the glass as the protection of end corona discharge too.Yet for the glass as external electric corona protection, the adjusting tolerance of its redox ratio is much lower.Oxygen activity to be adjusted to one with glass cools after maximum conductivity be worth accordingly.
Because therefore the heat-staple inorganic materials of preferred employing can realize the lasting tolerable temperature up to 500 ℃.Described motor can bear higher load thus with respect to end corona discharge protection EGS and external electric corona protection AGS.Therefore, can partly satisfy the precondition that motor bears high heat load more and electrical load.The electroconductibility of described fabric and/or non-woven fabrics can not be subjected to the disadvantageous effect of VPI dipping operation.The possibility that described VPI soaker is infected with by the conductive compositions in the corona discharge safeguard system (filler) also is excluded, and this is because there is not the conductive filler material that is in a kind of organic support material.
Described corona discharge protection is significant aspect insulation for motor.This point is particularly suitable for above-mentioned voltage at about high-voltage motor more than 3.3 kilovolts.When the insulation system of exploitation motor, especially to note three characteristics:
-thermostability;
-thermal conductivity and
-electrical characteristic
Aspect electrical characteristic, should note resistance, note the distribution of strength of electric field again.Especially on high-voltage motor, to adopt insulation system based on mica.
Utilize mica can realize that maximum field strength is 3.5 kvolts/millimeter.Can construct its insulation like this to the electric wire in the motor, at first, seal electric wire, additionally wrap a corona discharge protective layer again around this insulation layer subsequently with an insulation layer.The latter helps the electric wire surface to have a uniform field strength distribution.In addition, the corona discharge protective layer that is positioned at stator slot in the motor adjoins mutually with the laminated core of stator.This laminated stator core is located on the zero potential or on the star-like neutral tie point current potential.Described external electric corona protection is being designed to protect different with the end corona discharge aspect its electrical characteristic.The insulation of motor and corona discharge protection thereof are all relevant with the application of motor.Especially when some implement the other operation of the synthetic rectifiers of pulsation one motor, all can improve the insulating requirements and the corona discharge requirement of shelter of motor.The English of corona discharge protection is called " Corona shielding ".
According to a kind of favourable expansion design of corona discharge protection, fiber in non-woven fabrics and/or the silk thread in the fabric have silicon carbide as described conducting inorganic material.Described fiber and/or silk thread and/or the rove made are thus preferably made with the glass that comprises SiC (being particularly useful for EGS) for example or transition metal material equally.By adopting a kind of conducting inorganic material (transition metal oxide), shortcoming (ozone of shelf depreciation generation just, ozone layer destroying organic materials that organic conductive material can be influenced by shelf depreciation have been overcome.Can cause the shelf depreciation aggravation on the motor inside conductor after organic materials is destroyed again, from and produce more ozone, and then destroy organic materials to a greater degree.By such vicious cycle, can cause motor finally to lose efficacy) because of breaking down.For forming electroconductibility, for example be employing carbon black or graphite filler so far as organic resin.This resin then is used for flooding a kind of glass fabric or a kind of fabric of being made by polyester.Described carbon black or graphite are added to this being used for and flood in the organic resin of glass fabric or polyester textile.For further improving electroconductibility, also can be toward plus silicon carbide in this organic resin.Adopt organic resin to flood glass fabric or polyester textile and can limit maximum allowable temperature in the motor.Behind the carbon black or graphite in the ozone layer destroying organic resin that shelf depreciation produces, the electroconductibility of described corona discharge protection reduces.In addition, ozone also destroys organic resin itself, also is about to it and divides more and more and take off, and also can cause described corona discharge protective layer destroyed at last.The material that corona discharge protective layer is herein regulated electroconductibility by glass fibre, organic resin and being used to of containing thereof is formed.
According to a kind of favourable form of implementation, in order in defensive fiber of corona discharge and/or silk thread, to form electroconductibility, except adopting silicon carbide, also can adopt conductivity ceramics, transition metal oxide or composition or the corresponding material formed by them.
The protection of described corona discharge for example can all be made by electro-conductive fiber and/or silk thread, but also can be made by a part of electro-conductive fiber and/or silk thread and a part of non-conductive fiber and/or silk thread combination.This latter event adopts the concentration of material except change is used for electroconductibility, and the possibility of the conductive characteristic of the described corona discharge protective layer of another kind of adjusting also is provided.The feasible program of this adjusting electroconductibility is obvious simpler also more cheap than mixing.
Described corona discharge protection can be equipped with different electrical characteristic when protecting (abbreviating EGS as) as external electric corona protection (abbreviating AGS as) with the end corona discharge.The corona discharge protection of described end preferably has resistance value 5*10
8Ω.The representative resistor values that described external electric corona protective casing layer is had is approximately 1000 Ω.Yet this only is a reference value.This reference value depends on many factors.Corresponding factor for example has the length of voltage and end corona discharge protective layer.The protection of described corona discharge is corona discharge protection aspect but also especially can be used for realizing the lip-deep potential balance of main insulating layer aspect the corona discharge protection of end externally not only.Also guaranteed the homogeneity of electric field in addition by described corona discharge protection.Described end discharge protective layer is used to send the current potential of the laminated stator core of (Absenden) motor.Describedly be present in airborne magneticstrength and cause no longer that on having the lead outside surface of corona discharge protective layer spark discharge is arranged in the air.Described corona discharge protection is used for avoiding taking place shelf depreciation and corona discharge and arcing surface-discharge on described main insulating layer surface for this reason.
Described corona discharge protective layer especially can be applicable on the high-voltage motor.In general, the operating pressure of a high-voltage motor is greater than 3 kilovolts.Based on this high-voltage, be necessary on conductive line surfaces, to realize potential balance by a corona discharge protective layer.
Described fiber and/or silk thread are preferably made by the glass that obtains from a kind of glass melt.This glass melt has described conducting inorganic material.Be used for making the corona discharge protection non-woven fabrics or the method for the corona discharge armored fabric of take-up strap form for example a kind of, in a kind of glass melt, add a kind of electro-conductive material, so that produce the fiber that is used to produce a kind of silk thread of fabric and/or is used to produce a kind of non-woven fabrics subsequently.
The advantage of above-mentioned corona discharge protective layer is that it can only be made without organic materials ground with inorganic materials.
By the accompanying drawing illustrated embodiment some embodiments of the present invention are described in detail below, in the accompanying drawing:
Fig. 1 illustrates the insulation layer and the corresponding stator iron plate of a lead;
Fig. 2 illustrates a lead and stretches out from a laminated stator core;
Fig. 3 illustrates the relation of electroconductibility and conducting material concentration;
Fig. 4 illustrates two kinds of embodiments of a fabric.
One stator laminated core 2 is shown among Fig. 1 briefly, and it is made up of many stator iron plates 1.Be embedded with copper conductor 3 at described stator slot 9.This copper conductor 3 has a wire insulation cortex 7.This wire insulation cortex 7 is thicker outside laminated stator core 2 in laminated stator core 2 internal ratios.Described copper conductor 3 constitutes a winding overhang outside laminated stator core 2.But this winding overhang is not shown in Fig. 1.One corona discharge protective layer 4 and 5 are arranged on described wire insulation 7.The corona discharge protective layer that is used to be positioned at 3 sections of copper conductor of laminated stator core 2 inside is called as external electric corona protective layer (being called for short AGS) 5, and the corona discharge protective layer that is used to be positioned at 7 sections of wire insulation cortex of laminated stator core 2 outsides is called as end corona discharge protective layer (being called for short EGS) 4.Described external electric corona protective layer 5 and end corona discharge protective layer 4 all are used to realize control of Electric potentials.Described corona discharge protective layer 4,5 at least by a basic unit and be positioned at its outside coating form.Therefore, certainly can be designed to by than one deck host material layer and/or the more multi-layered corona discharge protective layer of forming of one deck coating, but this does not illustrate in the accompanying drawings yet.
Fig. 2 specifically illustrates a copper conductor and carries out the transition in the air 16 from described laminated stator core 1.This copper conductor 3 not only has an insulation cortex 7 but also has an external electric corona protective layer 5 and an end corona discharge protective layer 4.At link position 6 places, these two kinds of corona discharge protective layers 5 and 4 are bonded with each other.By in an advantageous manner described corona discharge protective layer being wrapped on the described wire insulation cortex 7 in half eclipsed mode as take-up strap, making described corona discharge protective layer for example be two superimposed ground and be positioned on the described wire insulation cortex 7.The stepped appearance that can be implemented in thus between external electric corona protective layer 5 and the end corona discharge protective layer 4 connects.Certainly also can there be other to twine possibility, for example be wound in single or multiple lift by a take-up strap.
In graphical diagram shown in Figure 3, electroconductibility 18 is shown on the Y length axis, the concentration 20 of electro-conductive material is shown on the X axis of abscissa.For example can adopt carbon and/or silicon carbide as electro-conductive material.Diagrammatic curve 22 has a precipitous upstroke slope 24 in an only very little change in concentration scope 26.By a kind of base material of dipping, problem has appearred in the concentration adjustment of electro-conductive material according to prior art in this expression.By drip-dry or evaporation, described concentration is easy to occur changing.This can cause electroconductibility very big variation to occur.Also another kind of problem can occur under said circumstances, that is, because the ozone that shelf depreciation produces has damaged the corona discharge protective layer, very intensive variation can appear in electroconductibility.The present invention then not only is used for substrate layer but also be used for coating by the employing inorganic materials, and cancels electroconductibility by the electro-conductive material in the coating, has solved the problems referred to above.
Fig. 4 represents two kinds of fabrics 40 and 41.Fabric 40 is plain goods, and fabric 41 then is three-dimensional pattern fabric (Koerperbindung).These two kinds of fabric type not only be understood to a kind of fabric of the substrate layer as coating but also be understood to be a kind of on its silk thread cated fabric.
Described fiber is made by the glass that is doped with electro-conductive material.From this glass fibre, can make a kind of fabric.For example make a plain goods that has through weft yarn thus.According to selected fabric type, its stability and elasticity are also different.Make fabric thinner more as far as possible in principle.In addition, woven fabric structure is also very important, because can influence magnetic field stationarity (Feldglaettung) by woven fabric structure.
Conducting inorganic material for example is the metal of different oxidation stages.Because described external electric corona protection is compared with the protection of end corona discharge higher electroconductibility is arranged usually, therefore obtain higher metal concentration by the metal that in described corona discharge protective layer, adopts different oxidation stages, can make described end corona discharge protective layer into external electric corona protective layer.
Claims (14)
1. corona discharge shield cap that is used for motor, it has the non-woven fabrics that a fabric that is made into by silk thread and/or is made by fiber, it is characterized in that described silk thread and/or fiber have the inorganic materials of a conduction.
2. corona discharge shield cap as claimed in claim 1 is characterized in that described silk thread and/or fiber are made by the glass with described conducting inorganic material.
3. corona discharge shield cap as claimed in claim 1 or 2 is characterized in that described conducting inorganic material has at least a transition metal oxide.
4. as each described corona discharge shield cap in the claim 1 to 3, it is characterized in that described conducting inorganic material is a ferriferous oxide.
5. as each described corona discharge shield cap in the claim 1 to 3, it is characterized in that described conducting inorganic material is a copper oxide.
6. corona discharge shield cap as claimed in claim 1 or 2 is characterized in that described conducting inorganic material is a silicon carbide.
7. corona discharge shield cap as claimed in claim 1 or 2 is characterized in that described conducting inorganic material is a conductivity ceramics.
8. as each described corona discharge shield cap in the claim 1 to 7, it is characterized in that described silk thread and/or fiber have a composition of being made up of at least two kinds of conducting inorganic materials.
9. as each described corona discharge shield cap in the claim 1 to 8, it is characterized in that this corona discharge shield cap is only made by inorganic materials.
10. adopt as the described corona discharge shield cap of above-mentioned each claim as external electric corona shield cap.
11. adopt as each described corona discharge shield cap in the above-mentioned claim 1 to 9 as end corona discharge shield cap.
12. in a high-voltage motor, adopt as the described corona discharge shield cap of above-mentioned arbitrary claim.
13. a method that is used to make as the described corona discharge shield cap of above-mentioned each claim wherein, is mixed an inorganic materials of conducting electricity in a glass melting liquid, produce described silk thread and/or fiber with this glass melting liquid then.
14. a motor is characterized in that, it has according to each described corona discharge shield cap in the claim 1 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2002127226 DE10227226A1 (en) | 2002-06-18 | 2002-06-18 | corona shielding |
| DE10227226.3 | 2002-06-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1662462A true CN1662462A (en) | 2005-08-31 |
| CN100374387C CN100374387C (en) | 2008-03-12 |
Family
ID=29723246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038144123A Expired - Lifetime CN100374387C (en) | 2002-06-18 | 2003-06-05 | Corona shield |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1513778A1 (en) |
| CN (1) | CN100374387C (en) |
| DE (1) | DE10227226A1 (en) |
| WO (1) | WO2003106362A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299781A (en) * | 2018-03-23 | 2019-10-01 | 通用电气公司 | The system and method for the surface-discharge in conductive winding for inhibiting motor |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010009462A1 (en) * | 2010-02-26 | 2011-09-01 | Siemens Aktiengesellschaft | A method of making an end corona shielding material and an end corona shield with the final corona shielding material |
| DE102011083214A1 (en) * | 2011-09-22 | 2013-03-28 | Siemens Aktiengesellschaft | Electrical conduit means, end corona shielding assembly, and method of making an end corona shield |
| DE102012000290A1 (en) | 2012-01-10 | 2013-07-11 | Voith Patent Gmbh | corona shielding |
| DE102012205654A1 (en) * | 2012-04-05 | 2013-10-10 | Siemens Aktiengesellschaft | Insulating system with end corona protection |
| EP2765685A1 (en) | 2013-02-08 | 2014-08-13 | Siemens Aktiengesellschaft | Outer corona protection with reliable connection to the main isolation and the sheet of stacks |
| DE102017223876A1 (en) * | 2017-12-29 | 2019-07-04 | Siemens Aktiengesellschaft | Winding insulation, electric machine and vehicle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3639113A (en) * | 1969-01-31 | 1972-02-01 | Margarita Semenovna Aslanova | Method of manufacturing tape possessing semiconducting properties |
| JPS62230644A (en) * | 1986-03-29 | 1987-10-09 | Shimadzu Corp | Production of electrically conductive fiber |
| JPH05244745A (en) * | 1991-11-25 | 1993-09-21 | Toyo Electric Mfg Co Ltd | Coil for rotary electric machine |
| DE4218928A1 (en) * | 1992-06-10 | 1993-12-16 | Asea Brown Boveri | Glow protection arrangement for the stator winding of an electrical machine |
| US6103648A (en) * | 1998-05-28 | 2000-08-15 | Circon Corporation | Bulk conducting glass compositions and fibers |
| DE19839285C1 (en) * | 1998-08-28 | 2000-04-27 | Siemens Ag | Glow protection tape |
-
2002
- 2002-06-18 DE DE2002127226 patent/DE10227226A1/en not_active Withdrawn
-
2003
- 2003-06-05 EP EP03759827A patent/EP1513778A1/en not_active Withdrawn
- 2003-06-05 WO PCT/DE2003/001865 patent/WO2003106362A1/en active Application Filing
- 2003-06-05 CN CNB038144123A patent/CN100374387C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299781A (en) * | 2018-03-23 | 2019-10-01 | 通用电气公司 | The system and method for the surface-discharge in conductive winding for inhibiting motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100374387C (en) | 2008-03-12 |
| WO2003106362A1 (en) | 2003-12-24 |
| EP1513778A1 (en) | 2005-03-16 |
| DE10227226A1 (en) | 2004-01-15 |
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