CN1338141A - Electrical conductor, turbogenerator and method for producing a corona shiled for an electrical conductor - Google Patents
Electrical conductor, turbogenerator and method for producing a corona shiled for an electrical conductor Download PDFInfo
- Publication number
- CN1338141A CN1338141A CN 00802784 CN00802784A CN1338141A CN 1338141 A CN1338141 A CN 1338141A CN 00802784 CN00802784 CN 00802784 CN 00802784 A CN00802784 A CN 00802784A CN 1338141 A CN1338141 A CN 1338141A
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- CN
- China
- Prior art keywords
- band
- electric conductor
- separating layer
- insulating barrier
- cell wall
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
Abstract
The invention relates to an electrical conductor (1) which can be glued in a groove (13) and is enveloped by a corona shield system (6). In said corona shield system (6) a separating layer (10) is provided for which compensates the difference in thermal expansion of the conductor (1) and groove (13). Said separating layer (10) can be configured as an expandable band. The corona shield system (6) also comprises a semiconducting base layer (7) and two bands (9, 11), which are rolled up together such that they overlap, and is readily produced by machine.
Description
The present invention relates to the electric conductor of a kind of Pasting in groove, it has an insulating barrier and an outside glow discharge protective device that is provided with on it.The invention still further relates to a kind of turbogenerator, it has a stator winding that is formed by this electric conductor.It is the method that the electric conductor of a Pasting in groove set up outside glow discharge protection that the present invention relates to a kind of in addition.
Respectively a book (the author: Hartmut.Meier) on the 80th page, the element of winding of the stator winding of large-size machine is set forth of " insulation of large-size machine " in 1963 by Springer publishing house.Point out that wherein the stator winding of large-size machine is made up of each identical to a great extent element of winding.The element of winding is to reduce supplementary loss to be made up of each mutually insulated and the winding line segment of combining closely mutually.Modal is Lebel bar (Roebelstab), and each winding line segment wherein is disposable all layers that pass in the groove height (Nuthoehe) in the groove zone, make to go out roughly the same voltage by a groove transverse field at each winding line segment internal induction.Having further described an electric conductor on to 85 pages the 83rd page of this book is how to utilize a mica that is called micafolium to bring to realize insulation.Be coated with a conductive layer on the insulating barrier of making, this coating stops between insulating surface and cell wall as outside glow discharge protective layer inevitably discharges in the air gap.
In the title of publishing in Vienna and New York respectively in 1973 the book (author: H.Sequenz) on the 156th page, describe a kind of outside glow discharge that is used for contact rod in detail and protect of " manufacturing of motor windings " by Springer publishing house.The glow discharge protection of this outside must have enough conductive capabilities, so that at the longitudinal length of whole contact rod and guarantee to have safe potential balance on ring week.But this conductive capability does not allow to surpass certain value yet, to prevent causing that because of groove longitudinal voliage or groove transverse field one can be destroyed coating and the final electric current that insulate that damages.In the time of in the contact rod insertion groove, must guarantee has good contacting with the laminated core of ground connection.Adopted in the past by fibrous band, for example the winding made of asbestos yarn, polyester bandage or other analog many times.These with on scribble conductive paint again and have certain flexible so that with the iron plate profile phase coupling of laminated stator.On the 150th page of 2.2.3 chapter of this book, then put down in writing vacuum-impregnated mica tape insulating barrier.Utilizing hardenable, solvent-free resin to carry out vacuum impregnation can realize adopting dissimilar thin mica sheets or sheet mica sheet to make insulating layer of conductor.In full dipping method (the 153rd page), contact rod at first brings insulation by twining a kind of mica, and is equipped with the glow discharge protective layer, and then in the groove of the laminated core of insertion stator.Whole subsequently stator that is laminated core and the electric winding that wherein is provided with are immersed in a kind of resin entirely.The electric conductor and the laminated core of electricity winding are pasted together.
Patent documentation WO97/04515 A1 discloses a kind of element of winding that is used for motor.This element of winding is made up of the electric conductor that is held by an insulating barrier.On this insulating barrier, scribble an outside glow discharge protective layer.This outside glow discharge protective layer is the take-up strap that a two sides all scribbles the semiconducting winding layer.This take-up strap is from being wrapped on the insulating barrier overlappingly.Between inside and outside two-layer semiconducting winding layer, form thus and electrically contact.Consequently, the essentially no current potential in the inside of band and therefore can not produce glow discharge.The inside of band comprises a separating layer (intermediate layer), and this separating layer has at the laminated core and the element of winding under the situation of different mechanical swelling degree splits as predetermined breakaway poing.Lower the thermal stress between the laminated core and the element of winding thus.
The object of the present invention is to provide a kind of electric conductor, its Pasting is in groove and have a kind of outside glow discharge protective device of being convenient to make.Another object of the present invention is to provide a kind of turbogenerator with a stator winding, the conductor of its stator winding has a kind of outside glow discharge protective device of being convenient to make.It is the method that the electric conductor of a Pasting in groove set up outside glow discharge protection that the present invention also has a purpose to be to provide a kind of, and this method can be implemented easy and at an easy rate.
First purpose of the present invention realizes by the electric conductor of a kind of Pasting on the cell wall of a groove; this electric conductor is made of a kind of conducting metal; it has an insulating barrier and an outside glow discharge protective device that is arranged on this insulating barrier that holds this conducting metal; wherein, this outside glow discharge protective device has
A) separating layer, the different heat expansion between cell wall and the conducting metal can be compensated by this separating layer,
A) basic unit of weakly conducting at least,
B) one has certain bandwidth and comprises described separating layer at interior band,
C) another band of weakly conducting at least, wherein
D) described basic unit is arranged on the insulating barrier, and
E) first band and second band overlap the to each other and are wrapped in the basic unit.
Electric conductor by a kind of resin impregnation in for example groove of the laminated core of a for example motor.By hardening of resin, electric conductor and insulating barrier are pasted together together with outside glow discharge protective device and the groove as adhesive matrix.Electric conductor is just pasted with cell wall like this.Because electric conductor has different mechanical swelling coefficients usually with cell wall, will cause producing thermal stress when whole device is heated or catches a cold between electric conductor and cell wall.Such mechanical stress may cause cracking in different positions uncontrollably, especially can crack on the adhesive matrix of having hardened.Such crackle may cause glow discharge, and this is the damage insulating barrier further, even finally causes failure of insulation.The crackle that described separating layer is used for causing because of thermal stress concentrates on one and is subjected to regulating in the zone of control.In fact crackle can not appear, because mechanical stress is lowered by separating layer outside this zone.By separating layer being placed between two equipotential zones, just can avoid causing glow discharge because of the crackle on the separating layer.Described first area is made of basic unit, and the band and the cell wall of weakly conducting constitute second area at least by second.This second band and cell wall electrically contact.Be wrapped in the basic unit second band and the first band overlaid.This second band also electrically contacts with basic unit thus.These two zones so the current potential that becomes are identical.Like this, separating layer just is arranged between two equipotential zones and therefore can suffer to cause the spike potential of glow discharge.
Said apparatus not only provides effective outside glow discharge protection, the more important thing is that it can make things convenient for and inexpensive the manufacturing especially.Especially also the possibility that has machinery production is because first band and second band can together be reeled by a sutomatic winding machine in one procedure.
Described basic unit preferably is made into a band equally.
Second band preferably has the bandwidth identical with first band and opens bandwidth half with respect to article one tape error.Electric conductor can be twined equably by first and second bands like this.First and second bands preferably are close to winding respectively, do not form the space.Therefore the biobelt that is made of first and second bands partly twines overlappingly, and this can form the outside glow discharge protective layer of uniform thickness.
First band preferably has sheet mica (mica sheet).For example mica sheet can be set on paper substrates.Can very realize separating layer easily by this mica sheet.But mica sheet is slide relative under certain mechanical stress.Although therefore electric conductor also is stuck and also can moves with respect to cell wall.Form predetermined breakaway poing by this separating layer, this is in when there is different mechanical stresses in electric conductor with cell wall and can splits.Thereby can compensate different thermal expansions and make and no longer form the mechanical stress that need arouse attention.
First band is an expandable layer preferably.This moment, separating layer just no longer formed predetermined breakaway poing, but by certain flexibility under the situation that has different mechanical swelling degree, the conduction physical efficiency is slided with respect to cell wall.First band is at this preferably an elastic webbing, especially a silicone rubber belt.
In addition, preferably have many through holes on first band.Can guarantee that like this adhesive penetrates article one and takes to and reach insulating barrier.This adhesive for example is a kind of synthetic resin.Utilize it to flood the insulating barrier of electric conductor and electric conductor is sticked on cell wall or the groove comprehensively.
First purpose of the present invention can realize by the electric conductor of a kind of Pasting on the cell wall of a groove equally, this electric conductor is made of a kind of conducting metal and the insulating barrier that held by the expandable separating layer of one deck, can compensate the cell wall thermal expansion different with electric conductor by this separating layer.
Utilize this expandable separating layer just to realize, when electric conductor exists different mechanical swellings to spend with respect to cell wall, reduce the thermal stress between electric conductor and the cell wall in easy especially mode.By making expandable separating layer distortion can realize this point.
Separating layer is not preferably pasted and is had a temperature stability.Its preferably a kind of silicone rubber belt.In addition, preferably have many through holes on the described separating layer.Electric conductor decision design is used for the stator winding of a turbogenerator.
Second purpose of the present invention realizes that by a kind of turbogenerator it has the stator winding made from above-mentioned electric conductor.
The 3rd purpose of the present invention realize by a kind of method that is the electric conductor of a Pasting on the cell wall of a groove, especially sets up outside glow discharge protection for the electric conductor that is held by an insulating barrier, according to this method,
A) on insulating barrier, lay one deck basic unit of weakly conducting at least;
B) with first band together with second at least the band of weakly conducting be wrapped in the basic unit, wherein, second band is turned up the soil with respect to article one tape error and is wrapped in the basic unit,
C) provide a separating layer by first band, can compensate different heat expansion between cell wall and the electric conductor by this separating layer.
The obtained advantage of the advantage of said method and aforementioned electric conductor of the present invention is the same.
Separating layer is a sheet mica tape preferably.
Separating layer is preferably inflatable, especially can be a silicone rubber belt.
By accompanying drawing one embodiment of the invention are described in detail below.Shown in accompanying drawing all be schematically and not to scale (NTS) illustrate.In the accompanying drawing:
Fig. 1 illustrates an electric conductor that is arranged in the groove;
Fig. 2 illustrates the vertical section of electric conductor;
Fig. 3 illustrates a turbogenerator.
Identical Reference numeral has the same representative meaning in different accompanying drawings.
Fig. 1 is the perspective view of an electric conductor 1.This electric conductor 1 has a conducting metal 3.The structure outline of this conducting metal 3 is not shown among the figure.But this conducting metal 3 is made of some the winding line segments and the cooling duct that may also be useful on cooling liquid usually.This conducting metal 3 is held by an insulating barrier 5.On insulating barrier 5, be laid with the basic unit 7 of semiconducting winding.This basic unit 7 can be band that is wrapped on the insulating barrier 5 for example.First band 11 of a design mix absciss layer 10 together with one second band, 9 overlaids be wrapped in this basic unit 7.Second band 9 is semiconduction.Constitute an outside glow discharge protective device 6 jointly by basic unit 7, second band 9 and first band 11.Electric conductor 1 is arranged on the cell wall 15 of a groove 13.By the vertical realization potential balance (Potentialvergleichmaessigung) of second band 9, thereby prevent between cell wall 15 and electric conductor 1, to produce glow discharge along electric conductor 1.
Available a kind of synthetic resin is immersed in electric conductor 1 in the groove 13, and makes it to paste with groove 13.When the whole device that is made of electric conductor 1 and groove 13 is heated or catches a cold, between electric conductor 1 and cell wall 15, produce different mechanical swellings.Because electric conductor 1 is pasted together with cell wall 15, this different mechanical swelling will cause mechanical stress, and mechanical stress can cause crackle, and crackle then can cause glow discharge.For the generation that reduces and/or control this crackle is provided with separating layer 10.
This separating layer 10 for example can be the sheet mica band.When mechanical stress effect thereon the time, the splitting in a kind of like this sheet mica band will form slide relative.This can cause forming predetermined breakaway poing, and the crackle that causes because of thermal stress concentrates on herein.Described second weakly conducting band 9 and weakly conducting basic unit 7 hold this separating layer 10.Therefore, separating layer 10 all is arranged in a no voltage belt with the crackle that is produced.By second weakly conducting band 9 is wound on first band 11 that constitutes separating layer 10 so that a half-band width is overlapping, make second band 9 not only contact but also be positioned at outside the separating layer 10 with basic unit 7, reach no current potential.Like this, the basic unit 7 and second band 9 electrically contact, and second band 9 electrically contacts with cell wall 15 again.Basic unit 7 and second band 9 and cell wall 15 thereby identical current potential is arranged.Therefore separating layer 10 is arranged in a no voltage belt.
Also can be by constituting separating layer 10 as first band 11 with a silicone rubber belt.A kind of like this silicone rubber belt is inflatable, and it can be by be out of shape to bear the different thermal expansion of electric conductor 1 and cell wall 15 compensatoryly.
By with basic unit 7 and two common twine be with 9,11 can constitute described outside glow discharge protective device 6 easy especially and at an easy rate.In addition, also there is the mechanization manufacturing feasibility in this outside glow discharge protective device 6.
Fig. 2 is the sectional arrangement drawing of an electric conductor 1.Same as shown in Figure 1, this electric conductor 1 is made of a kind of conducting metal 3, is wound with a layer insulating in its external packets.On insulating barrier 5, be laid with weakly conducting basic unit 7.First and second bands 11,9 are wrapped in this weakly conducting basic unit 7 jointly.They have a bandwidth B respectively.Second band 9 is with respect to half bandwidth B/2 of first band, 11 offsettings.This partly is wrapped in the basic unit 7 overlappingly by two bands that second band 9 and first band 11 constitute, and this means that first band 11 and second band 9 are close to mutually with being connected to twine, and does not stay intermediate space.Second band 9 is weak inductive, and it can guarantee that outside glow discharge protective device 6 and one unshowned cell wall 15 in Fig. 2 electrically contacts.Separating layer 10 can be as mentioned above by first band 11, and for example a silicone rubber belt constitutes.
Fig. 3 illustrates a turbogenerator 21.This turbogenerator 21 has a rotor 23 along axis 24 orientations.This rotor 23 comprises an axle 25, which is provided with a rotor winding 27.Rotor 23 is centered on one heart by a stator 29.Stator 29 comprises a laminated core 31, and 24 ground that parallel to the axis on the surface within it are shaped on some grooves 13.Be installed on electric conductor 1 in the groove 13, only exemplarily show one of them electric conductor 1 among Fig. 3.Electric conductor 1 constitutes a stator winding 28.This electric conductor 1 has an outside glow discharge protective device 6 according to the front to the description of Fig. 1 and Fig. 2, and this discharge protector 6 constitutes first band 11 of separating layer 10 by one and second band 9 of a weakly conducting is formed.Whole stator 29 all is immersed in a kind of resin.Flood the insulating barrier 5 of electric conductor 1 and but electric conductor 1 anti-vibration ground is pasted together with laminated core 31 by this full dipping.Stator 29 is arranged in the housing 35 together with rotor 23.
Claims (15)
1. the electric conductor (1) of a Pasting on the cell wall (15) of a groove (13); this electric conductor is made of a kind of conducting metal (3); it has an insulating barrier (5) and an outside glow discharge protective device (6) that is arranged on this insulating barrier (5) that holds this conducting metal (3); wherein; this outside glow discharge protective device (6) has a separating layer (10); different heat expansion between cell wall (15) and the conducting metal (3) can be compensated by this separating layer (10); it is characterized in that this outside glow discharge protective device (6) also has
A) basic unit of weakly conducting (7) at least,
B) one comprise described separating layer (10) interior first band (11) and
C) another band of weakly conducting (9) at least, wherein
D) described basic unit (7) is arranged on the insulating barrier (5), and
E) first band (11) and second band (9) overlap the to each other and are wrapped in the basic unit (7).
2. electric conductor as claimed in claim 1 (1) is characterized in that, first band (11) and second band (9) have a bandwidth (B), and wherein, second band (9) is with respect to first band (11), half bandwidth (B) that staggers.
3. electric conductor as claimed in claim 1 or 2 (1) is characterized in that, first band (11) has sheet mica.
4. electric conductor as claimed in claim 1 or 2 is characterized in that, separating layer (10) is an expandable layer.
5. electric conductor as claimed in claim 4 is characterized in that, first band (11) is an inflatable band, especially a silicone rubber belt.
6. as claim 4 or 5 described electric conductors, it is characterized in that having many through holes (12) on first band (11).
7. as the described electric conductor of above-mentioned each claim, it is characterized in that it is used to constitute the stator winding (28) of a turbogenerator (21).
8. the electric conductor (1) of a Pasting on the cell wall (15) of a groove (13), this electric conductor is made of a kind of conducting metal (3) that has an insulating barrier (5), this insulating barrier is held by a separating layer (10), different heat expansion between cell wall (15) and the conducting metal (3) can be compensated by this separating layer (10), it is characterized in that this separating layer (10) is inflatable.
9. electric conductor as claimed in claim 8 (1) is characterized in that, described separating layer (10) is an elastic webbing, especially a silicone rubber belt.
10. electric conductor as claimed in claim 9 (1) is characterized in that, has many through holes (12) on the described separating layer (10).
11., it is characterized in that it is used to constitute the stator winding (28) of a turbogenerator (21) as claim 9 or 10 described electric conductors (1).
12. a turbogenerator (21), it has the stator winding (28) that a usefulness described electric conductor of above-mentioned each claim (1) constitutes.
The electric conductor (1) that 13. a kind to be a Pasting go up at the cell wall (15) of a groove (13), held by an insulating barrier (5) is set up the method for outside glow discharge protection (6), wherein,
A) on insulating barrier (5), lay one deck basic unit of weakly conducting (7) at least;
B) band (11) is wrapped in the basic unit (7) at least together with another the band of weakly conducting (9) overlaid, wherein, second band (9) has overlapping being wrapped in the basic unit (7) in certain offsetting ground with respect to first band (11),
C) provide a separating layer (10) by first band (11), can compensate different heat expansion between cell wall (15) and the electric conductor (1) by this separating layer (10).
14. method as claimed in claim 13, wherein, first band (11) is a strip of sheet mica tape.
15. method as claimed in claim 13, wherein, first band (11) is inflatable, and it is a silicone rubber belt especially.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99100379 | 1999-01-18 | ||
| EP99100379.9 | 1999-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1338141A true CN1338141A (en) | 2002-02-27 |
Family
ID=8237326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00802784 Pending CN1338141A (en) | 1999-01-18 | 2000-01-10 | Electrical conductor, turbogenerator and method for producing a corona shiled for an electrical conductor |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1149457A1 (en) |
| JP (1) | JP2002535948A (en) |
| CN (1) | CN1338141A (en) |
| AR (1) | AR022288A1 (en) |
| BR (1) | BR0008891A (en) |
| CA (1) | CA2360321A1 (en) |
| WO (1) | WO2000042695A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106716787A (en) * | 2014-09-25 | 2017-05-24 | 西门子公司 | Corona shielding system and electrical machine |
| US10673294B2 (en) | 2014-09-25 | 2020-06-02 | Siemens Aktiengesellschaft | Corona shielding system for an electrical machine |
| US11081923B2 (en) | 2014-09-25 | 2021-08-03 | Siemens Aktiengesellschaft | Corona shielding system for an electrical machine |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007282410A (en) * | 2006-04-10 | 2007-10-25 | Toshiba Corp | Rotating electric machine, stator coil thereof, its manufacturing method, and semiconductive sheet, semiconductive tape |
| JP4913551B2 (en) | 2006-11-07 | 2012-04-11 | 株式会社日立製作所 | Rotating electrical machine winding, rotating electrical machine, and semiconductive insulating substrate used therefor |
| JP6585441B2 (en) * | 2015-09-17 | 2019-10-02 | 株式会社東芝 | Rotating electrical machine coil, rotating electrical machine, and method of manufacturing rotating electrical machine coil |
| EP3240150A1 (en) * | 2016-04-25 | 2017-11-01 | Siemens Aktiengesellschaft | Electrical machine and method for dismantling and assembling the electric machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50151304A (en) * | 1974-05-29 | 1975-12-05 | ||
| JP3105256B2 (en) * | 1991-09-13 | 2000-10-30 | シーメンス アクチエンゲゼルシヤフト | Impregnation structure consisting of support and winding element |
| ATE179288T1 (en) * | 1995-07-18 | 1999-05-15 | Siemens Ag | WINDING ELEMENT FOR AN ELECTRICAL MACHINE |
| JPH09149578A (en) * | 1995-11-21 | 1997-06-06 | Fuji Electric Co Ltd | High pressure rotating machine coil |
| WO1997043817A1 (en) * | 1996-05-15 | 1997-11-20 | Siemens Aktiengesellschaft | Conductor winding arrangement for heavy electric machines |
-
2000
- 2000-01-10 CN CN 00802784 patent/CN1338141A/en active Pending
- 2000-01-10 WO PCT/EP2000/000110 patent/WO2000042695A1/en not_active Application Discontinuation
- 2000-01-10 EP EP00901519A patent/EP1149457A1/en not_active Withdrawn
- 2000-01-10 CA CA002360321A patent/CA2360321A1/en not_active Abandoned
- 2000-01-10 BR BR0008891-9A patent/BR0008891A/en not_active Application Discontinuation
- 2000-01-10 JP JP2000594187A patent/JP2002535948A/en not_active Withdrawn
- 2000-01-14 AR ARP000100167 patent/AR022288A1/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106716787A (en) * | 2014-09-25 | 2017-05-24 | 西门子公司 | Corona shielding system and electrical machine |
| US10673294B2 (en) | 2014-09-25 | 2020-06-02 | Siemens Aktiengesellschaft | Corona shielding system for an electrical machine |
| US10862362B2 (en) | 2014-09-25 | 2020-12-08 | Siemens Aktiengesellschaft | Corona shielding system and electrical machine |
| US11081923B2 (en) | 2014-09-25 | 2021-08-03 | Siemens Aktiengesellschaft | Corona shielding system for an electrical machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002535948A (en) | 2002-10-22 |
| EP1149457A1 (en) | 2001-10-31 |
| WO2000042695A1 (en) | 2000-07-20 |
| AR022288A1 (en) | 2002-09-04 |
| CA2360321A1 (en) | 2000-07-20 |
| BR0008891A (en) | 2001-11-13 |
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