CN1272239A - Insulation for conductor - Google Patents
Insulation for conductor Download PDFInfo
- Publication number
- CN1272239A CN1272239A CN98809635A CN98809635A CN1272239A CN 1272239 A CN1272239 A CN 1272239A CN 98809635 A CN98809635 A CN 98809635A CN 98809635 A CN98809635 A CN 98809635A CN 1272239 A CN1272239 A CN 1272239A
- Authority
- CN
- China
- Prior art keywords
- semiconductor layer
- insulant
- conductor
- insulating material
- electric insulation
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/15—Machines characterised by cable windings, e.g. high-voltage cables, ribbon cables
Abstract
An electrical insulation (1) for a conductor (2, 3, 8), arranged in a plurality of turns for generating a magnetic field, comprising an insulant (6) of a solid material. The insulation is tubular and comprises an inner semiconducting layer (5) and an outer semiconducting layer (7). The semiconducting layers are adapted to contain between themselves an electric field. The joint between one of the semiconducting layers and the insulant (6) exhibits an adhesion which allows a retained mechanical contact in case of a structure-changing stress.
Description
Technical field
The present invention relates to for for forming insulant and the insulating method that conductor that magnetic field is assembled into many circles is used.Particularly, the present invention relates to the insulant in the circuit in electric rotating machine.With regard to electric rotating machine, refer to electric energy is converted to mechanical energy or device conversely.This device comprises circuit, magnetic circuit and mechanical system.Mechanical system comprises each other movably two objects.When the mechanical movement that is forced to is arranged, just form magnetic field, it is become electric energy by circuit conversion.When supply of electrical energy, just form magnetic field, it is converted to mechanical energy by mechanical system.With regard to electric rotating machine,, refer to generator and motor as employed in the text below.
The present invention preferentially is confirmed as being applied to the electric rotating machine that turns round under heavy current and high voltage, for example, produce the generator of electric energy.Mechanical system comprises stator and rotor here, and rotor can rotate with respect to stator with one degree of freedom thus.Circuit can be at rotor or stator, or is assembled into winding among both.By making the winding energising, between rotor and stator magnetic field appears.Magnetic field can be by adjusting magnetic core Be Controlled or the enhancing in stator and the rotor, this magnetic core may by, for example the lamination of sheet magnetic material heap constitutes.Yet the present invention only is not limited to the application to electric rotating machine, but also can be used for any electric installation or device, and wherein conductor is insulated and is used high voltage.
Background technology, problem
In order to describe valuable performance of the present invention, the rotary electric machine that will get generator forms here is described tout court.The generator type of normal use is so-called synchronous motor in effectively using.This machine comprises the rotatable axle journal rotor with rotor winding that stationary stator surrounded that stator winding is arranged.The two all comprises the material of magnetizable rotor and stator, and they preferably are made of the lamination heap of sheet material.By the rotating shaft of transmit mechanical power to rotor, rotor is impelled to do constant rotatablely moving.Electric current is caused in the rotor winding and flows, and occurs rotating magnetic field thus, and it causes electric current in stator winding.
Stator winding is arranged in stator in the slit that radially embeds.Slit is axially located and rotates symmetrically and distributes along stator.Stator winding comprises the conductor of one or more series connection, and conductor is assembled into coil, and they are arranged in the slit by two of every grooves.In AC machines, will the inductance variation of winding conductor cross section appear crossing over.Maximum reactance is obtained in the bottom of conductor and therefore the major part of electric current is tending towards flowing at the top of conductor.In order to reduce moving of this electric current, conductor is divided into many strands of mutually insulated.Be divided into strand and can not avoid changing, but these will be moved, promptly change the position for the inductance of different strands.A kind of like this transposition is implemented in the outside of stack of sheets usually, but also may be arranged in the slit by so-called Roebel transposition.The selection of the size of strand is to trading off between requirement electricity and machinery.According to the viewpoint of electricity, many strands are preferably arranged, because this has reduced moving of electric current, but according to the viewpoint of machinery, coil may become and more be difficult to make and install.Minority has large-sized strand will cause problem, for example when conductor is bent.
When making the high voltage winding insulation, at first hot, electricity, the emphasis point of environment and machinery must be taken into account.The life-span that these are commonly called " TEAM " (heat, electricity, extraneous with machinery) and more or less influence insulant.According to the viewpoint of heat, insulant should allow may comprise 0-180 ℃ temperature rising in one hour.According to the viewpoint of electricity, insulant must be allowed the electric insulation of the satisfaction that does not cause the electric field gathering.According to the external world or environment viewpoint, insulant should not be subjected to the influence of dust, ozone or condensation.According to the viewpoint of environment, and insulant make or on-stream period between should not cause any environmentally harmful radiation yet, and, during through friction, should be able to be repeated to utilize.At last, according to the viewpoint of machinery, insulant must make coil can be installed on the stator but still can move when conductor and insulating material thermal expansion.
Though the height between the voltage ratio strand between conductor, the voltage of conductor and strand is lower.Therefore the insulation of strand and conductor often realizes easily.Yet coil itself must be withstood and may equal whole phase voltages of several kilovolts.For this reason, coil is insulated with respect to stator by main insulant.Under high potential difference, owing in the distortion of field, high electric field strength place, partial discharge takes place easily, i.e. PD, this partial discharge is called corona usually.When corona takes place, among other objects, produce ozone (O
3), it has corrosivity to organic substance.Thereby corona causes the weakening of organic insulating material, and therefore main insulant comprises the material of anti-corona.A kind of such material is a mica, and it is inorganic compound and the invasion and attack of standing ozone.
The insulating material of normal use contains mica as key component.Mica often is embedded in the adhesive that is configured on the strip-like carrier.The material of carrier and adhesive can be different.A kind of general embodiment of main insulant is the form of getting the saturated resin band that contains little mica splitting, and it also is cured in heating process on conductor subsequently.Top at main insulant disposed the corona protection device, and it is the outside corona that prevents between coil sides and the slot wall.
Mica is very frangible material, and it has low shearing strength.Mica also shows thermal expansion, and it is, and for example 1/5th of copper.When loading motor, winding is subjected to the rising of temperature.Conductor often is made of copper, and then is tending towards expanding manyly than insulant.Because the different hot propertys of material, between conductor and insulant thereby produce voltage.Because mica has lower shearing strength, thereby fracture occurs, it causes cavity in insulant.At last, cavity is by the air filling and cause the significant distortion of electric field.At this habitat, corona takes place.
From US 5,066,881, the insulant that is used for generator was understood in the past, and its main task is to contact with the outside of main insulant to arrange an energy transfer charge corona is reduced to minimum thin layer.For this reason, insulant is surrounded by the semiconductor layer of curable glass fiber coating.This paint replacement the band of ground connection of having the ability of the prior art in order to prevent the corona transfer charge.New coating is declared to make it more to help to meet the profile of insulant and can be kept its semiconducting behavior better after main insulant is solidified.In one embodiment, semiconductor layer is applied to the terminal area of the upper and lower of main insulant Inside coil.This embodiment is declared to cause balanced equipotential around terminal.Known insulant does not increase any new thing to prior art.Thereby, be before to understand by configuring semiconductor layer outside insulant with transfer charge.
Distinct issues are that insulating material shows different thermal expansions with conductor in such as the electric rotating machine insulation process of generator or motor.Under the situation of variations in temperature, this means that insulating material and conductor move relative to each other so that cavity occurs.The electric field at the most close conductor place is the strongest.The cavity thereby the present place of corona risk maximum, in known generator, corona to a certain degree allows, and alternative is contains insulant to withstand the mica of discharge.As discussed above, mica has inferior mechanical performance.When discharge took place, ozone was formed, and carrier of its corrosion insulant and adhesive, caused that insulant damages gradually.Thereby after a while, stator winding must be replaced together with insulant.
Other problem is the electromagnetic distu that causes of discharge in the motor that known corona is allowed to, it cause sensitive electronic equipment disturbed or, even shut down.
Summary of the invention
The objective of the invention is to make the insulant of using for the conductor that is assembled into many circles for formation magnetic field.Particularly, the present invention relates to be assembled in the insulant in the electric rotating machine, it can be got rid of the generation of partial discharge (PD) and have long useful life.This insulant also should bring the maintenance of simplification and more reliable than the insulation system of previously known.According to the viewpoint of environment, insulant must cause less environmentally harmful radiation during making, use and rubbing.The method that the present invention also aims to propose to be used for the insulant of electric rotating machine and can realize above-mentioned target.When being existing motor when changing winding, this insulant is particularly suitable.
By according at the insulant of the indicated characteristic performance of the description part of claim 1 independently and 8 and with the method for indicated characteristic performance in according to the description partly at claim to a method 9 independently, above-mentioned purpose can be implemented according to the present invention.Useful embodiment is pointed out in the description part of relevant claim.
Electric insulation is a kind of medium or material, and when between the conductor that is placed on different electromotive forces, it only makes little or unworthy electric current can pass through therefrom.Under the situation that electromotive force between conductor increases, the electric field strength of passing insulant also increases.Because the dielectric strength of material is exceeded, this has also increased the risk that punctures.Dielectric strength is defined as material the proof maximum electrical potential gradient of institute's energy does not take place to puncture.
As the dielectric breakdown of gas is by the result who is applied in the free electron index multiplication that voltage brings out.In steady electric field, the voltage that punctures nidus is the long-pending function of pressure and distance.Here, under two kinds of less and bigger situations of this product, gas all has high breakdown strength.Under the situation of small size and High Voltage, the electronics that is quickened by electric field can not be quickened fully to be used for by with other electron collisions to cause puncture.Under the situation of bigger volume and low pressure, the collision of sufficient amount consequently can not take place in the number of electronics very little.Under appropriate condition, electronics is accelerated to such speed so that when colliding with other electronics that are accelerated by identical mode, thus as the puncture of snowslide.In actual applications, the dielectric strength that gas is marked is about 0.5 kvolts/millimeter.Under the lower situation of electric field strength, thereby, there is not corona to occur in the cavity of inflating in the insulating material or between conductor and the insulant.
In the high field technical scope, that is to say that when electric field strength surpassed the dielectric strength of gas, the risk of corona was just very remarkable.The cavity that contains gas in insulating material is at this moment inevitable with spontaneous discharge.Thereby, have very big needs so that the cavity in the insulant between insulant and the conductor minimizes or get rid of fully, and adjust electric field so that a gathering of avoiding.
Comprise the predetermined elongated tubulose insulating material that removes to surround conductor according to insulant of the present invention.Insulating material have be adapted at they itself between an inboard of accommodate electric field and the semiconductor layer in an outside.Semiconductor layer is covering insulating material inside and outside and be connected to insulating material so that can follow mutually with such adhesion thing under the situation of structural change respectively, and structural change for example is to be caused by stress heat or machinery.Thereby joint must not contain cavity, does not neither also occur in by interconnective material in manufacture process under the situation of stress.This adhesion thing between insulating material and two semiconductor layers is by they are implemented with the identical materials manufacturing.If temperature changes, material then similarly expands, thereby does not have, or has only very little power to pass the joint generation.Yet the adhesion thing also may exist between the material with different machinery and hot property.For example, the adhesion thing at joint can by to material heat treatment so that they flood into same structure mutually at joint obtains.Then in the material of extremely contiguous joint, be absorbed in variation machinery between insulating material and two semiconductor layers or heat as elasticity or plastic deformation.
La m is suitable for galvanoplastic or capacitively connects with conductor, and outside layer is suitable for being coupled to, and for example or controllable electromotive force, the electric field that is produced between conductor and ground is enclosed between the semiconductor layer in the insulant thus.Because variation of temperature or mechanical influence do not cause the generation of any PD at the inner issuable any cavity of insulant.Between conductor and inner semiconductor layer, there is not electrical potential difference.
By guaranteeing that by above-mentioned mode corona does not take place, insulating material can be made with organic material and not need any additional mica.The sufficient insulating capacity of material then can be utilized.Because the ozone that does not have to weaken material forms, the thickness of insulant can be done thinlyyer.Therefore insulant can be made by uniform material, for example thermoplastic resin or rubber composition.A kind of such suitable material is a crosslinked polyethylene.Semi-conducting material can make and make it to contain the powder of conduction by identical materials, for example carbon black or pulverous coal.Therefore the insulating material that has two semiconductor layers can pass through in a simple manner, and for example hot pressing is applied to conductor.
The insulant system is intended for use to have the coil of the many conductors that are divided into strand especially.The insulant of conductor and strand is suitable for having more the material of high-dielectric constant make by having than main insulant.By this configuration, the insulant that is positioned at main insulant inner semiconductor layer the inside can change electric field and become littler so that pass the focusing of inboard insulant.The equipotential lines so that the bigger gathering that substitute in inboard insulant " pressure " appearance occur in the main insulant.Change by this also makes bigger gathering be expanded in bigger zone, thereby the gathering of field is watered down.
Under the situation of discharge impact, for example, electric rotating machine is shocked by electricity.One or several microseconds during, so voltage rises in the winding.Electrical potential difference there in the coil between the conductor can reach tens kilovolts.Each conductor strand is suitable for making the thin strands insulation thing of conductor strand mutually insulated to center on.The strands insulation thing is generally suitable for the intensity of short-term that electrical breakdown is demonstrated.Thereby two conductor strands are with being equivalent to the insulation thickness of two strand insulants by mutually insulated.Equally, and coil between the conductor strand that interrelates of different conductor, the two layers of thickness of this insulant is configured.Therefore under the situation of electric shock, the puncture between them just takes place occasionally.
Because surround a plurality of conductors, just at the thickness of semiconductor layer with the strands insulation thing that causes the insulant formation reality between the conductor strand that contacts simultaneously according to insulant of the present invention.Semiconductor layer is fit to be connected in the conductor strand that belongs to a conductor.So have only the hundreds of volt at semiconductor layer and during the electrical potential difference between the nearest conductor strand in there is running well.The strands insulation thing insulate to preventing to puncture to constitute fully.Under the situation of electric shock, electromotive force is increased to several kilovolts immediately.Yet this potential change has no time to be expanded into whole intensity in semiconductor layer, so may not puncture generation in this case.
Here the insulant of mentioning is allowed the environment of corona free at normal operation period.This means that organic insulating material also can be used makes the strands insulation thing.The solution of significantly more exquisite insulant has been opened up new possibility in the environment of this contrast generation corona.Have the organic insulating material that improves performance can be chosen and also insulating barrier can do thinlyyer.In order to handle the insulant between conductor strand and inner semiconductor layer safely, each conductor that comprises all conductor strands can cover with the skin of high-quality insulating material.
The accompanying drawing summary
The present invention illustrates in greater detail the description of embodiment with reference to the accompanying drawings, wherein
Fig. 1 illustrates the cross section according to the coil of the stator winding by comprising insulant of the present invention, and
Fig. 2 illustrates the cross section that has the insulant of circular cross section according to of the present invention, and this insulant surrounds two conductors.
The description of preferred embodiment
The cross section of the typical winding coil by electric rotating machine is shown among Fig. 1.Coil comprises first conductor with many strands 2 and also has second conductor of many strands 3.The strand that belongs to each conductor is surrounded by strands insulation thing 4, and strands insulation thing thereby formation are around the insulating barrier of conductor strand.What center on strands insulation thing 4 is insulant 1, and it comprises the insulating intermediate layer 6 with inner semiconductor layer 5 and outer semiconductor layer 7.
Fig. 2 illustrates the cross section of insulant 1, and insulant 1 comprises first conductor 11 of a plurality of conductor strands 2 and comprises second conductor 12 of a plurality of conductor strands 3.First conductor is insulated that layer 9 surrounds and second conductor is insulated layer 10 and surrounds.The insulant 1 that surrounds comprises insulating intermediate layer 6, inner semiconductor layer 5 and outer semiconductor layer 7.In the drawings, different layers deliberately done thickly in case outstanding they.In fact, semiconductor layer approaches, and the insulating barrier of encirclement conductor and conductor strand is extremely thin.When making insulant according to the present invention, and conductor and conductor strand are enclosed in the there, and insulating barrier can be compressed into the uniform insulation thing that surrounds conductor and conductor strand.
On the surface that the outer semiconductor layer is suitable for the Potential Distributing on ground is limited in the outside of insulant.Outer semiconductor layer thereby the necessary surface that covers whole embracing layer.Equally, the inner semiconductor layer phase voltage that is suitable for being connected to conductor is distributed on the inboard border of insulant.Inner semiconductor layer thereby the necessary whole inboard surface that limits of insulant that covers.In this article, the term semi-conducting material means a kind of material to have than the obvious low electric conductivity of conductor, but electric conductivity still is not so poor so that can be considered to as insulator.For example, the material that is included in two-layer can have 10
-4Ohm meter-10
4In the ohm meter scope, the resistivity in 1 ohmcm-100 ohm scope especially.
Insulating intermediate layer is by having high electric strength, and the insulating material that for example surpasses 7 kvolts/millimeter is assembled into.By make two semiconductor layers be contained in mutually between whole electrical potential differences, and because between them, there is not cavity, so there is not partial discharge to produce.Thereby insulating intermediate layer can be by organic material, and for example thermoplastic resin or rubber composition are assembled into.Two semiconductor layers can advantageously be used with the insulating intermediate layer identical materials and make, and in this case, the powder of conduction as carbon black or pulverous coal, is sneaked in the material.Suitable material is, for example, and crosslinked polymer.
The significant advantage of resulting relevant prior art is that insulating material no longer must provide by winding.Polymeric material provides by hot pressing expediently, and two semiconductor layers are provided by same process in this case.This just guarantees that cavity is excluded fully.Do not need to be manufactured from the same material for insulating material and semiconductor layer.Conclusive argument is not have cavity to produce between material.For this reason, two materials that separate can be interconnected so that be held in the adhesion performance between them during heat or the mechanical influence by such method.Have under the situation of materials with different properties, around the region generating stress of joint because material expand manyly than another kind of material for a moment.So adhesive should can attract these stress by so strong consequently joint.This can be by joint the elasticity or the plastic deformation of both sides material finish.A significant advantage of polymeric material is that it is deformable and can suffers the mechanical deformation of repetition and do not jeopardize adhesive between the layer in its useful life.These materials can be fused together when heat supply simply, so that material floods each other and forms the uniform joint that does not have cavity.
In order to withstand the load that causes by surge, for example come the impact of self discharge, insulating barrier is assembled and surrounds each conductor.And the possibility of the electrical potential difference between the conductor strand that different conductor interrelates even impact is arranged, reaches tens kilovolts.The short term strength that the antagonism of the individual layer of strands insulation thing punctures is not enough to block the puncture between conductor strand and the semiconductor layer usually.Keep enough resistance safely for these are punctured, conductor is surrounded by external insulation layer 9,10.By making inner semiconductor layer have the resistance that under the electric shock situation, harmful electromotive force can not be transmitted, also may form enough fail safes to puncturing.
Claims (13)
1. for the conductor (2 that is assembled into many circles for formation magnetic field, 3,8) electric insulation of usefulness (1) comprises solid insulating material (6), it is characterized in that insulant be tubulose and contain inner semiconductor layer (5) and outer semiconductor layer (7), semiconductor layer is suitable for accommodate electric field between they are own, joint between a semiconductor layer and insulating material (6) has the adhesion thing thus, if the stress of structural change, it is kept Mechanical Contact.
2. according to the electric insulation of claim 1, it is characterized in that inner semiconductor layer (5) is electrically connected to conductor strand (8).
3. according to the electric insulation of claim 1 or 2, it is characterized in that outer semiconductor layer (7) is connected to controllable electromotive force, preferably ground connection.
4. according to the electric insulation of above-mentioned arbitrary claim, it is characterized in that insulating material (6) and two semiconductor layers (5,7) show identical thermal expansion.
5. according to the electric insulation of above-mentioned arbitrary claim, it is characterized in that semiconductor layer (5,7) all made by the material of resistivity in 1 ohmcm-100 ohm meter scope.
6. according to the electric insulation of above-mentioned arbitrary claim, it is characterized in that insulant is suitable for surrounding conductor to be essentially rectangular cross section.
7. according to the electric insulation of above-mentioned arbitrary claim, it is characterized in that insulating material (6) and/or semiconductor layer (5,7) all are crosslinked form polyethylene.
8. for the conductor (2 that is assembled into many circles and in magnetic field, rotates, 3,8) electric insulation of usefulness (1) comprises solid insulating material (6), it is characterized in that insulant be tubulose and contain inner semiconductor layer (5) and outer semiconductor layer (7), semiconductor layer be adapted at they itself between accommodate electric field, joint between a semiconductor layer and insulating material (6) has the adhesion thing thus, if the stress of structural change, it is kept Mechanical Contact.
9. for the conductor (2 that is assembled into many circles for formation magnetic field, 3,8) method of the insulant of usefulness, the insulant that wherein comprises solid insulating material (6) is used to surround conductor, it is characterized in that insulant be tubulose and be equipped with inner semiconductor layer (5) and outer semiconductor layer (7), semiconductor layer be adapted at they itself between accommodate electric field, joint between a semiconductor layer and insulating material (6) has the adhesion thing thus, if the stress of structural change, it is kept Mechanical Contact.
10. according to the method for claim 7, it is characterized in that insulating material (6) and two semiconductor layers (5,7) are assembled with the material with identical thermal expansion.
11., it is characterized in that insulant surrounds cross section and is essentially rectangular conductor according to the method for claim 7 or 8.
12., it is characterized in that insulant and semiconductor layer are applied to conductor by the hot pressing of cross-linked polymer according to the method for claim 7,8 or 9.
13. in electric rotating machine,, particularly upgrade relevant winding to replacing with a kind of like this machine according to the use of claim 1-7 insulant or the method that is used to insulate according to claim 8-11.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE97035653 | 1997-09-30 | ||
| SE9703565A SE510590C2 (en) | 1997-09-30 | 1997-09-30 | Electrical insulation for a conductor arranged for generating a magnetic field in a plurality of turns, a method for insulating the conductor and using the insulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1272239A true CN1272239A (en) | 2000-11-01 |
Family
ID=20408461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98809635A Pending CN1272239A (en) | 1997-09-30 | 1998-09-29 | Insulation for conductor |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP1020003A1 (en) |
| JP (1) | JP2001518775A (en) |
| KR (1) | KR20010023988A (en) |
| CN (1) | CN1272239A (en) |
| AR (1) | AR016940A1 (en) |
| AU (1) | AU728661B2 (en) |
| BR (1) | BR9812543A (en) |
| CA (1) | CA2304525A1 (en) |
| PL (1) | PL338927A1 (en) |
| SE (1) | SE510590C2 (en) |
| WO (1) | WO1999017425A1 (en) |
| ZA (1) | ZA988894B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179212B (en) * | 2006-11-07 | 2012-02-01 | 株式会社日立制作所 | Rotating electrical machine winding, rotating electrical machine, and semiconductive insulating component used therein |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10008803A1 (en) * | 2000-02-25 | 2001-09-13 | Siemens Ag | Electric rotary machine |
| CA2344564C (en) * | 2000-09-14 | 2008-07-22 | General Electric Canada Inc. | Graded electric field insulation system for dynamoelectric machine |
| JP5108251B2 (en) * | 2006-04-26 | 2012-12-26 | 住友電気工業株式会社 | Insulated wire and electric coil using the same |
| CN101662178B (en) * | 2009-09-21 | 2012-11-21 | 嘉兴市新大陆机电有限公司 | Semiconductor thermal expansion glass mat and production method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH547028A (en) * | 1972-06-16 | 1974-03-15 | Bbc Brown Boveri & Cie | GLIME PROTECTION FILM, THE PROCESS FOR ITS MANUFACTURING AND THEIR USE IN HIGH VOLTAGE WINDINGS. |
| DE3031866A1 (en) * | 1980-08-23 | 1982-04-01 | Brown, Boveri & Cie Ag, 6800 Mannheim | LADDER BAR FOR ELECTRICAL MACHINE |
| US5066881A (en) * | 1984-08-23 | 1991-11-19 | General Electric Company | Semi-conducting layer for insulated electrical conductors |
| US5175396A (en) * | 1990-12-14 | 1992-12-29 | Westinghouse Electric Corp. | Low-electric stress insulating wall for high voltage coils having roebeled strands |
-
1997
- 1997-09-30 SE SE9703565A patent/SE510590C2/en not_active IP Right Cessation
-
1998
- 1998-09-29 ZA ZA988894A patent/ZA988894B/en unknown
- 1998-09-29 JP JP2000514377A patent/JP2001518775A/en active Pending
- 1998-09-29 WO PCT/SE1998/001715 patent/WO1999017425A1/en not_active Application Discontinuation
- 1998-09-29 CA CA002304525A patent/CA2304525A1/en not_active Abandoned
- 1998-09-29 KR KR1020007002713A patent/KR20010023988A/en not_active Application Discontinuation
- 1998-09-29 EP EP98945732A patent/EP1020003A1/en not_active Withdrawn
- 1998-09-29 AU AU92908/98A patent/AU728661B2/en not_active Ceased
- 1998-09-29 CN CN98809635A patent/CN1272239A/en active Pending
- 1998-09-29 PL PL98338927A patent/PL338927A1/en unknown
- 1998-09-29 AR ARP980104874A patent/AR016940A1/en unknown
- 1998-09-29 BR BR9812543-5A patent/BR9812543A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179212B (en) * | 2006-11-07 | 2012-02-01 | 株式会社日立制作所 | Rotating electrical machine winding, rotating electrical machine, and semiconductive insulating component used therein |
Also Published As
| Publication number | Publication date |
|---|---|
| SE9703565L (en) | 1999-03-31 |
| JP2001518775A (en) | 2001-10-16 |
| SE510590C2 (en) | 1999-06-07 |
| PL338927A1 (en) | 2000-11-20 |
| AR016940A1 (en) | 2001-08-01 |
| AU9290898A (en) | 1999-04-23 |
| BR9812543A (en) | 2000-07-25 |
| KR20010023988A (en) | 2001-03-26 |
| SE9703565D0 (en) | 1997-09-30 |
| AU728661B2 (en) | 2001-01-18 |
| CA2304525A1 (en) | 1999-04-08 |
| EP1020003A1 (en) | 2000-07-19 |
| ZA988894B (en) | 1999-03-30 |
| WO1999017425A1 (en) | 1999-04-08 |
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