EP3066747A1 - Système d'isolation, stator, machine électrique, notamment turbogénérateur, et procédé d'isolation d'un élément conducteur électrique - Google Patents

Système d'isolation, stator, machine électrique, notamment turbogénérateur, et procédé d'isolation d'un élément conducteur électrique

Info

Publication number
EP3066747A1
EP3066747A1 EP15700532.3A EP15700532A EP3066747A1 EP 3066747 A1 EP3066747 A1 EP 3066747A1 EP 15700532 A EP15700532 A EP 15700532A EP 3066747 A1 EP3066747 A1 EP 3066747A1
Authority
EP
European Patent Office
Prior art keywords
strip
insulation system
electrical
strip material
long side
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15700532.3A
Other languages
German (de)
English (en)
Inventor
Andrey Mashkin
Friedhelm Pohlmann
Mario Brockschmidt
Alexander Litinsky
Ralf Merte
Guido Schmidt
Christian Staubach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP15700532.3A priority Critical patent/EP3066747A1/fr
Publication of EP3066747A1 publication Critical patent/EP3066747A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/04—Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
    • 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
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures

Definitions

  • Isolation system stator, electric machine, in particular turbo-generator, and method for insulating an electrical see Leitelements
  • the invention relates to an insulation system of an electrical conducting element of an electrical machine having a plurality of insulation system layers comprising a réellepotential- control layer, a main insulating layer, corona protection an exterior and Endenglimmschutz für in wel ⁇ chem, respectively, this insulation system layers comprise an impregnated with resin tape strip of material is wound with a plurality of windings to the electrical Leit ⁇ element, that the windings are arranged with overlapping ⁇ areas at the long side regions of the strip of strip material semi-overlapping.
  • the invention also relates to a stator of an electrical
  • Machine with at least one groove comprehensive stator core and with electrically conductive guide elements, which are arranged in the grooves of the at least one stator core insulating.
  • the invention further relates to an electrical machine, in particular ⁇ a turbogenerator, with an insulation system for insulating electrical guide elements against a stator core for holding the electrical guide elements.
  • the invention further relates to a method for insulating an electrical guide element of an electrical machine, in which an internal potential control layer, a main insulation layer, a mecanicglimmschutz für and a Endenglimmschutz slaughter each strip material strip ⁇ wound with a plurality of windings to the electrical guide element and in which these windings Long side regions of the respective strip of strip material are arranged half overlapping.
  • the base body for this purpose comprises a grounded laminated core, which provides a plurality of grooves, in which the electrical guide elements are fixed.
  • the electrically conductive guide elements must therefore be insulated with respect to this laminated core with a correspondingly formed insulating system.
  • the insulation system comprises a main insulation with a main insulation layer of one or more strip of strip material, which are wound in several layers around the respective electrical Leit ⁇ element.
  • the insulating system comprises yet a further inwardly disposed approximately Potentialsteue ⁇ layer and protective layer has a further outwardly disposed disorderglimm ⁇ and also further outwardly disposed Endenglimmschutz Mrs.
  • the internal potential control ⁇ layer ifiesglimmtik für and the protective layer consist of Endenglimm- to the electrical conducting element wound strip of slat material.
  • the internal potential control layer and the outer corona protective layer serve to shield against cavities and detachments.
  • the electrical voltage is in the main insulating layer from the inner potential control layer in the radial direction
  • Let to the conspiracyglimmschutz Mrs strain ⁇ builds, which ensures that the electric field remains only in the interior of the main insulation layer and no partial discharges occur between the main insulation layer and the earthed laminated core.
  • the less conductive end corona protection layer is applied, which is electrically connected to the outer mica protective layer.
  • all the aforementioned layers of the insulating layer are ⁇ , from strip material strip produced which are respectively located primarily semi-overlapping element wound around the electric Leitele- and impregnated with resin in general.
  • Said half-overlapping arrangement of the individual windings of the respective strip of strip material guarantees a good axial as well as radial connection of the windings in the conductive layers and as long as possible erosion paths in the main insulation layer. This can be a very long time
  • the strips of strip material of the main insulation layer in this case contain insulating mica particles, while the strips of strip material of the other layers are doped with various semi-conductive and / or conductive particles.
  • Such a constructed insulating has worked well, but it is disadvantageous that in the
  • Main insulation layer in the overlap areas Defective areas arise, which are predominantly filled only with resin and less geri ⁇ ger with the insulating mica particles. These so-formed main insulation layer defect areas differ from the other main insulation layer areas, in which a proper resin-mica particles mixture is present, by a lower elec ⁇ cal strength. The defect areas, however, experience a higher field load due to the lower permittivity compared to the proper resin-mica particle mixture. Therefore, such mistakes should be avoided as far as possible.
  • the object of the invention is an insulation system of an electrical guide element of an electrical machine with a plurality of insulation system layers comprising a
  • insulation system layers each comprise a resin-impregnated strip of strip material which is wound around the electrical conducting element with a plurality of windings such that the windings overlap with overlapping areas at long side regions of the strip of strip material are arranged, wherein the insulation system according to the invention is characterized in that at least one of the strip of strip material is flattened at its long side regions relative to its central region.
  • resin-filled intermediate spaces can also be prevented or at least contained in these areas, so that the risk of partial electrical discharges, which is due to a mix of field distortions, electrically conductive edges and a weak electrical Conductivity of the resin can be produced, can be reduced well.
  • the danger can using the inventive isolate insurance system overall very well be countered that, when electrically charged insulation systems in particular a partial discharge induced erosion is ausbil ⁇ Denden "treeing" channels, which can ultimately lead to electrical penetration of the insulation arises.
  • all of the insulation system layers may be provided with a strip of strip material having flattened side regions opposite its center region.
  • the present insulation system can preferably be used between electrical guide elements and a ground potential in the groove and winding head region of an electrical machine.
  • the object of the invention is also achieved by a stator of an electric machine with at least one grooves ⁇ stanchion ⁇ send stator core and electrically conductive Leit ⁇ elements, which are held in the insulating grooves of the at least one stator core, wherein the stator by an insulation system according to one of the present features.
  • This allows the stator slightest ⁇ tung capable and / or be designed with a longer service life.
  • the object of the invention of an electrical machine, in particular of a turbogenerator, with an insulation system for insulating electrical guide elements against a laminated core for holding the electrical guide elements is achieved, wherein the electrical machine by an insulation system according to one of the present claims and / / or by a stator according to any of the present characteristics.
  • the drive safety of the electric machine can be significantly increased.
  • the isolation system of the present invention comprises the individual isolation system layers, namely, the internal potential control layer (IPS), the main insulation layer, the outer corona protection layer (AGS) and the end corona protection layer (IPS).
  • the inner potential control layer is wound radially inward directly in regions onto the electrical guide element.
  • the main insulation layer is arranged, which in turn is wound onto the radially inner potential control layer.
  • Radially further outside fol ⁇ gen the technicallyglimmschutztik and Endenglimmschutz- layer which are axially adjacent to one another wound on the radially inner main insulation layer.
  • each of the insulation system layers may be formed by one or more such strip of strip material.
  • a plurality of strip of strip material are wound in the radial direction as winding layers on each other, for example, to obtain a sufficiently thick main insulation ⁇ layer.
  • electrical conducting element describes together ⁇ menhang with electrical machinery wires, coils, rods or the like, which are permanently against each other and / or with respect to a stator core and / or the other around the electrical machine electrically isolate. It is further understood that the strip of strip material can be produced in a variety of ways with its long side regions which are flattened with respect to the middle region or with their flat side ends.
  • the present strip of strip material can be made, for example, as previously customary from rolled up on large rolls of ribbons. These tapes are application specific to the respective strip of tape with the desired
  • the tapes have production focus ⁇ dingt a rectangular profile, whereby the therefrom ge ⁇ cut strip material strips also have a correspondingly rectangular profile.
  • this right ⁇ shaped profile is however converted according to the invention, when the tape material strips used here are produced from such strips.
  • the respective strip of strip material has at its long side areas so plate side ends. This is particularly easy to achieve if the material of the strip of strip ⁇ material is compressed at the long side regions or at the outer sides of the strip of strip material.
  • the object of the invention is also achieved by a method for insulating an electrical guide element of an electrical machine, in which an internal potential control layer, a main insulation layer, a
  • At least one of the strip of slat material in Pope- tung at its long side portions thinner than the area of its longitudinal center axis configured may especially in the ⁇ over the volume of the interstices between the individual windings lappungs Schemeen be greatly reduced.
  • the strip of strip material on its outer sides has a smaller material thickness than in its middle region, in order to be able to obtain favorable overlapping regions at the individual insulating system layers.
  • the band strip of material cross section in width direction ⁇ is not homogeneous configured so that the effects described above can be well realized.
  • the conventional strips of strip material have a rectangular profile due to their production.
  • the interaction between individual windings can be further improved if the upper surface side of the belt strip of material and the lower surface side of the strip ⁇ material strip at the long side areas point to run into each other in the side edges.
  • a further advantageous embodiment provides that at least one of the strips of strip material is configured biconvex in the width direction with regard to its two surface sides.
  • biconvex configured surface sides of the strip of strip material can be bent in particular at its Langsei- ten Colouren or rounded designed as previously possible, so that the individual windings can nestle closer together in the overlapping areas, which in turn spaces between the individual winding layers are much smaller pronounced.
  • this makes it possible to produce rounded edge bands or side edges, as a result of which sharp edges on the hinge sides or side edges of the long side regions can be avoided.
  • a central region of the at least one of the tape strip of material by means of a continuously curved transition region merges said one Bandmate- rialstMails in thinner than the Mittenbe ⁇ rich configured long side portions. Due to the continuously curved over ⁇ transition region, the interacting long side portions of the strip of slat material to the on or lying on each other windings may particularly without gaps cling to each other.
  • an outer side edge of a Langsei ⁇ ten Schemes a winding of at least one strip of strip strip ⁇ over a turning point of a concave curved surface in the width direction of an immediately adjacent winding of at least one strip of strip angeord ⁇ net, so that the windings of the at least one Bandmateri ⁇ al strip particularly can be intimately connected.
  • the individual windings of the strip of slat material can then ⁇ over addition significantly interact better with each other when an outer side edge of a long side end of a winding of the strip of slat material to the longitudinal centerline of an immediately adjacent winding of the strip of slat material is about arranged. This also reduces the risk of partial discharges.
  • a contact surface between two immediately adjacent windings of the at least one strip of strip material in the width direction is arranged above a point of inflection of a widthwise concavely curved surface of an immediately adjacent winding of the at least one strip of strip material.
  • At least the contact surface is not reduced compared to previous solutions and remains at least the same size. Such a contact surface can further reduce the risk of partial discharges in particular.
  • the present features of the invention may provide a more homogeneous design of the insulation system resulting in reduced field distortions in the main insulation layer and bypassing conductive edges or the like on the more conductive insulation system layers, such as the internal potential control layer, the external corona protective layer and the final corona protective layer.
  • Fig. 1 is a schematic plan view of an insulation system
  • Fig. 2 is a schematic detail view of a Hauptisolie approximately ⁇ layer and an adjacent radially inner mecanicential horrungs- layer of the insulation system of FIG. 1.
  • the insulation system 1 is provided on an example shown in the figure 1 stator core 2 of a stator 5 used in an electric machine 3 in the form of a Turbogenera ⁇ gate 4 so as to isolate an electric conducting element 6 in the form of a copper rod member 7 relative to the stator core.
  • the electrical Leit ⁇ element 6 is in this case in grooves 8 (only shown by way of example) of the stator core 2 is arranged.
  • the stator core 2 is still traversed by a variety of cooling channels 9 in order to better dissipate heat.
  • the insulation system 1 consists of a plurality of insulation system layers 10, namely an inner potential control layer 11, a main insulation layer 12, an outer corona protection layer 13 and an end protection layer 14 which are wound around the electrical conduction element 6.
  • the insulation system layers 10 are arranged in the radial direction 15 as follows.
  • Radially outer layer is the main insulation 12 is arranged ⁇ which is in turn wound onto the radially inner internal potential control layer. 11
  • main insulation layer 12 is embodied as an average resin strip (not numbered) impregnated strip of strip material 21 (numbered only by way of example), which are wound around the internal potential control layer 11.
  • the respective strip of strip material 20, 21, 22 and 23 are respectively numbered with a plurality of windings 30, 31, 32, 33, 34 (only as an example) , see Figure 2) wound around the electrical guide element 6; in such a way that the individual windings 30, 31, 32, 33, 34 of the respective strip of strip material 20, 21, 22 and 23 in the axial direction 17 along the central axis 16 with overlapping areas 35 (here only exemplified) half overlapping each other ⁇ are orders.
  • the internal potential control layer 11 consists of a single winding layer 36 formed by the single strip of strip material 20, while the main insulation layer 12 is wound from a total of four winding layers 37, 38, 39 and 40.
  • the strip of strip material 20 to 23 at their respective long side regions 41 and 42 with respect to their respective center regions 43 flattened.
  • the windings 30, 31, 32, 33, or 34 can nestle closer together, and this results in significantly smaller spaces 44 filled with resin (numbered only by way of example) than has hitherto been the case with methods known from the prior art.
  • This flattening of the long-side regions 41 and 42 can be achieved particularly well by compressing the strip material strips 20 to 23, which are cut to width end width or produced directly on width gauge, on their outer sides or on the long-side regions 41 and 42.
  • the strip of strip material 20 to 23 in their width direction 45 at their long side regions 41 and 42 are thinner than in the region of their longitudinal central axes 46 (here only exemplified) and thus have a variable band cross-section.
  • the contact surfaces 52 acting between the individual windings 30 to 34 have a particularly large surface area, since the outer side edges 53 and 54 (numbered only by way of example) of the long side regions 41 and 42 of the windings 30 to 34 to over a respective turning point 55 (only exemplified) of the concave curved in the width direction 45 surface sides 47 and 48 of each immediately adjacent winding 30 to 34 addition.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

L'invention concerne un système d'isolation (1) d'un élément conducteur électrique (6) d'une machine électrique (3) comportant une pluralité de couches de système d'isolation (10) comprenant une couche de commande de potentiel intérieure (11), une couche d'isolation principale (12), une couche anti-corona extérieure (13) et une couche anti-corona d'extrémité (14), dans lequel ces couches de système d'isolation (10) comprennent chacune un ruban de matière (20, 21, 22, 23) imprégnée de résine qui est enroulé sur une pluralité d'enroulements (30, 31, 32, 34) autour de l'élément conducteur électrique ( 6, 7) de telle sorte que les enroulements (30, 31, 32, 34) sont disposés avec des zones de recouvrement (35) sur des zones latérales allongées (41, 42) du ruban de matière (20, 21, 22, 23) en se recouvrant à moitié, le système d'isolation de l'invention étant caractérisé en ce que l'un au moins des rubans de matière (20, 21, 22, 23) est aplati sur ses zones latérales allongées (41, 42) par rapport à sa zone centrale (43).
EP15700532.3A 2014-01-15 2015-01-06 Système d'isolation, stator, machine électrique, notamment turbogénérateur, et procédé d'isolation d'un élément conducteur électrique Withdrawn EP3066747A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15700532.3A EP3066747A1 (fr) 2014-01-15 2015-01-06 Système d'isolation, stator, machine électrique, notamment turbogénérateur, et procédé d'isolation d'un élément conducteur électrique

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP14151235.0A EP2897256A1 (fr) 2014-01-15 2014-01-15 Système d'isolation, stator, machine électrique, notamment turbogénérateur, et procédé d'isolation d'un élément conducteur d'électricité
PCT/EP2015/050078 WO2015106985A1 (fr) 2014-01-15 2015-01-06 Système d'isolation, stator, machine électrique, notamment turbogénérateur, et procédé d'isolation d'un élément conducteur électrique
EP15700532.3A EP3066747A1 (fr) 2014-01-15 2015-01-06 Système d'isolation, stator, machine électrique, notamment turbogénérateur, et procédé d'isolation d'un élément conducteur électrique

Publications (1)

Publication Number Publication Date
EP3066747A1 true EP3066747A1 (fr) 2016-09-14

Family

ID=49920253

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14151235.0A Withdrawn EP2897256A1 (fr) 2014-01-15 2014-01-15 Système d'isolation, stator, machine électrique, notamment turbogénérateur, et procédé d'isolation d'un élément conducteur d'électricité
EP15700532.3A Withdrawn EP3066747A1 (fr) 2014-01-15 2015-01-06 Système d'isolation, stator, machine électrique, notamment turbogénérateur, et procédé d'isolation d'un élément conducteur électrique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14151235.0A Withdrawn EP2897256A1 (fr) 2014-01-15 2014-01-15 Système d'isolation, stator, machine électrique, notamment turbogénérateur, et procédé d'isolation d'un élément conducteur d'électricité

Country Status (5)

Country Link
US (1) US20160329769A1 (fr)
EP (2) EP2897256A1 (fr)
JP (1) JP2017503466A (fr)
CN (1) CN105917552A (fr)
WO (1) WO2015106985A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9883411B2 (en) 2015-11-24 2018-01-30 Cisco Technology, Inc. External cellular recovery device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4913551B2 (ja) * 2006-11-07 2012-04-11 株式会社日立製作所 回転電機巻線及び回転電機並びにそれに用いる半導電性絶縁基材
EP2587638A1 (fr) * 2011-10-26 2013-05-01 Siemens Aktiengesellschaft Protection contre l'effet de couronne pour une machine électrique
EP2645539A1 (fr) * 2012-03-26 2013-10-02 Siemens Aktiengesellschaft Couches d'enroulement avec différents matériaux

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2015106985A1 *

Also Published As

Publication number Publication date
EP2897256A1 (fr) 2015-07-22
CN105917552A (zh) 2016-08-31
WO2015106985A1 (fr) 2015-07-23
US20160329769A1 (en) 2016-11-10
JP2017503466A (ja) 2017-01-26

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