WO2019076543A1 - Stator et machine électrique pourvue d'un stator - Google Patents

Stator et machine électrique pourvue d'un stator Download PDF

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Publication number
WO2019076543A1
WO2019076543A1 PCT/EP2018/074572 EP2018074572W WO2019076543A1 WO 2019076543 A1 WO2019076543 A1 WO 2019076543A1 EP 2018074572 W EP2018074572 W EP 2018074572W WO 2019076543 A1 WO2019076543 A1 WO 2019076543A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
shielding
slot
axial direction
groove
Prior art date
Application number
PCT/EP2018/074572
Other languages
German (de)
English (en)
Inventor
Jochen Reiter
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to CN201880067287.6A priority Critical patent/CN111194515B/zh
Publication of WO2019076543A1 publication Critical patent/WO2019076543A1/fr

Links

Classifications

    • 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
    • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation 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
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices
    • 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
    • H02K3/00—Details of windings
    • H02K3/42—Means for preventing or reducing eddy-current losses in the winding heads, e.g. by shielding

Definitions

  • the invention is based on a stator of an electric machine. Furthermore, the invention is based on an electric machine comprising the stator.
  • Winding wires and the disk set of the stator known. Between the uppermost conductor in a stator slot and a rotor of an electric machine, an electric field arises, which due to the control by means of a pulse inverter leads to a high-frequency alternating voltage induced on the rotor and to high-frequency leakage currents when the rotor shaft is not insulated. These described effects affect to a very considerable extent the required electromagnetic compatibility. Furthermore, the charge induced by the electric field on the rotor leads to electrical breakdowns in a greasy film of the bearings, in particular
  • the invention relates to a stator according to the preamble of independent claim 1, namely a stator of an electric machine, with a Statorachse having Statorblechb and provided in Statorblechong grooves, wherein the grooves each have a groove bottom and a groove bottom facing away from the slot-shaped groove opening, wherein in the grooves in each case an electrically insulating support member of a slot insulation is arranged, which receives a number of electrical conductors of an electrical winding and wherein at least one conductive and Nutö Stamms rock arranged
  • Shielding element of the slot insulation is arranged on the carrier element.
  • the Carrier element is formed in one piece, wherein the carrier element overlaps in a region and forms a closed cross-section through the overlap.
  • the closed cross section can be understood as a substantially closed cross section.
  • the overlapping region is formed by end regions of the carrier element.
  • the shielding element is preferably arranged at least in the slot opening or in the area of the slot opening.
  • the invention is based on an electric machine according to the preamble of independent claim 13, namely an electric machine with a stator.
  • an electrically conductive shielding element which effects a shielding of the electric field is provided as soon as the
  • Shielding element suitably electrically connected to the stator lamination stack and to ground or so close to a Nutinnenober Installation - without
  • Shielding for example, can not be guaranteed on tooth heads in the radial direction.
  • a reduction of the axial conductivity by segmentation may be necessary if the magnetic alternating flux in the yoke leads to an induced voltage surrounding the yoke cross section, which otherwise could lead to a burnup of the shield.
  • the at least one shielding element of the slot insulation is arranged on the side of the carrier element facing away from the electrical conductors.
  • the electric field can be shielded towards the rotor of the electric machine.
  • the shielding element preferably has a coating which is formed as a lacquer layer, a foil or a metal sheet.
  • the overlapping region is arranged in the groove base, wherein the shielding element is on the overlapping region
  • the overlapping region is arranged in the groove opening or in the region of the groove opening, wherein the shielding element is located at least on the overlapping region of the carrier element.
  • parts of the support element overlap either in the region of the groove bottom or alternatively in the region of the groove opening, wherein the
  • Shielding element is arranged nut paragraph.
  • the shielding element is arranged on an outer circumferential surface of the carrier element.
  • the overlapping parts are the legs of the carrier element.
  • a first leg of the carrier element overlaps a second one
  • the shielding element completely overlaps the first leg.
  • the shielding element extends at least on one side to about half the height of a side edge of the groove.
  • the overlapping region is arranged on the side facing away from the electrical conductors.
  • a plurality of shielding elements in the axial direction with respect to the stator axis are arranged on at least one of the support elements, which are electrically separated from each other and electrically connected at least on one side with the stator lamination.
  • the at least one shielding element extends from the slot opening along at least one side edge of the groove wholly or partially.
  • the shielding element can also be guided completely over the cross section of the carrier element.
  • At least one of the support elements in each case a plurality of shielding elements arranged in the axial direction with respect to the stator axis, which are electrically separated from each other, wherein the shielding elements have a transverse width measured to the axial direction, which is smaller than the width of the slot opening of the associated groove, and which are electrically connected via at least one web to the stator lamination.
  • the at least one web extends from the slot opening along at least one side edge of the groove wholly or partially.
  • the web can also be guided completely over the cross section of the carrier element. Under a web can be understood an electrical contact lug.
  • the adjacent shielding in the axial direction distances in the range between 10 ⁇ to 200 ⁇ , in particular 50 ⁇ on.
  • the shielding elements Despite the interruptions formed between the shielding elements, the shielding elements have a large area on the carrier element, so that the shielding effect is only insignificantly reduced by the interruptions.
  • a single, strip-shaped shielding element is provided on at least one of the carrier elements, which has a width measured transversely to the axial direction, which is smaller than the width of the slot opening of the associated groove, and electrically connected via at least one web to the stator lamination is.
  • Statorblechpers not over the entire length of the groove or the Stator laminations short-circuits, but only in the region of at least one ridge of the shielding. This will be by magnetic
  • Embodiment because of the lack of interruptions greater than in the first embodiment, so that here too the shielding effect is sufficiently given.
  • the at least one web extends from the slot opening along at least one side edge of the groove wholly or partially.
  • the at least one web extends from the slot opening along at least one side edge of the groove wholly or partially.
  • a single shielding element is provided on at least one of the support elements, which has an elevation having a width measured transversely to the axial direction, which is smaller than the width of the slot opening of the associated groove, and which has a longitudinal extent in the axial direction and having a bridge electrically connected to the Statorblechumb with the same height as the increase, wherein on the non-elevated areas which are lower relative to the increase, electrically insulating means are arranged.
  • the at least one web extends from the slot opening along at least one side edge of the groove wholly or partially.
  • the web can also be guided completely over the cross section of the carrier element.
  • a width of the shielding element is at most 2/3 of the thickness of the slot insulation less than a width of the slot opening and / or an axial length of the web measures a maximum of 5% of the laminated core length in the axial direction.
  • the at least one shielding element is in each case on the
  • the at least one shielding element is not ferromagnetic, eg of aluminum, tin, copper, silver, gold.
  • the shielding element in the longitudinal direction has a length in the range of 3 mm to 5 cm and / or the layer thickness of the at least one shielding element is in the range of 1 ⁇ and 100 ⁇ .
  • the at least one shielding element is designed to be longer in the axial direction than at least one of the axial stator ends
  • Figure 1 is a sectional view of a stator according to the invention according to a first embodiment
  • Figure 2 is a plan view of one of the grooves of the stator of Figure 1;
  • Figure 3 is a plan view of a folding sheet for the production
  • Figure 4 is a schematic view of a fully folded groove insulation
  • Figure 5 is a sectional view of a stator according to the invention according to a second embodiment
  • Figure 6 is a plan view of one of the grooves of the stator of Figure 5;
  • Figure 7 is a plan view of a slot insulation folded sheet for
  • Figure 8 is a schematic view of a fully folded groove insulation
  • Figure 9 is a plan view of a slot insulation folded sheet for
  • Figure 10 is a plan view of a slot insulation folded sheet for
  • Figure 1 1 is a plan view of one of the grooves of an inventive
  • Figure 12 is a sectional view of a stator according to the invention according to a further embodiment.
  • FIG. 1 shows a sectional view of a stator according to the invention of an electrical machine according to a first exemplary embodiment.
  • the stator 1 has a laminated stator core 2 and in the laminated stator core 2
  • grooves 3 which extend for example in the direction of a stator 4 of the stator lamination 2 and in which a number of electrical conductors 5 are arranged at least one electrical winding.
  • the laminated stator core 2 is formed from a stack of laminations made of electrical steel, between each of which insulation may be provided to avoid eddy currents.
  • the grooves 3 of the stator 1 are each formed between teeth 1 .1 of the stator 1 and each have a groove bottom 3.1 and a groove bottom 3.1 facing away from the slot-shaped groove opening 3.2.
  • the cross-section of the slot openings 3.2 of the stator 1 is in each case narrowed, since the teeth 1.1 of the stator 1 at 5 their end facing away from the groove bottom 3.1 each having a cantilever tooth head 1 .2 projecting shoulder-shaped into the respective groove 3.
  • In the groove 3 is a conductor 5 of the electrical winding receiving
  • Carrier element 6.1 a groove insulation 6 arranged.
  • the slot insulation 6 comprises in each case an electrically insulating carrier element 6.1 and at least one shielding element 6.2 arranged on the carrier element 6.1 made of electrically conductive
  • the electrically conductive shielding 6.2 are on the
  • the support member 6.1 is integrally formed and has a closed cross-section, resulting as a result
  • Overlapping of the support element 6.1 results. Due to the overlap, a region 9 is formed.
  • the carrier element 6.1 of the slot insulation 6 closes the slot openings 3.2 of the slots 3, wherein the carrier element completely surrounds or surrounds the conductors 5 of the electrical winding.
  • the carrier element 6.1 holds the electrical conductors 5 within the respective groove 3.
  • the overlapping region 9 is arranged on the side facing away from the electrical conductors 5.
  • Parts 6.1 .1 and 6.1 .2 of the support element 6.1 overlap in the region of the groove bottom 3.1.
  • the overlapping parts 6.1 .1 and 6.1 .2 can be understood as the legs of the support element 6.1.
  • the at least one shielding element 6.2 of the slot insulation 6 is arranged on the side facing away from the electrical conductors 5 side of the support element 6.1 and serves to shield the electric field to the rotor 8 of the electric machine.
  • the at least one shielding element 6.2 is a coating, a
  • Lacquer layer a foil or a sheet metal. This can be at least one
  • Shielding element 6.2 of the slot insulation 6 each glued to the support member 6.1, welded, painted, sprayed, dropped or vapor-deposited.
  • the support element 6.1 may preferably be an uncalendered or partially calendered insulation paper.
  • the support member 6.1 may be made of a synthetic aromatic polyamide polymer, or an insulating film or an insulating tape.
  • the at least one shielding element 6.2 is applied in each case to the slot insulation 6 in a first step.
  • the finished slot insulation 6 are inserted as a component in the respective groove 3.
  • the shield 6.2 extends on both sides to about half the circumference of the support member 6.1.
  • the slot insulation 6 are inserted into the grooves 3 such that their support elements
  • Shielding elements 6.2 in the first embodiment in each case running wider than the slot openings 3.2 of the stator 1, so that the shielding 6.2 respectively beyond their slot opening 3.2 out in the region of the groove 3 below the respective tooth heads
  • FIG. 2 shows a plan view of one of the grooves 3 of the invention
  • a plurality of shielding elements 6.2 in the axial direction x with respect to the stator axis 4 are arranged one behind the other on at least one, for example on each of the slot insulation 6, wherein these
  • stator lamination 2 At least one side, for example, on both sides, are electrically connected to the stator lamination 2.
  • the shielding 6.2 of the stator 1 are after the first
  • Embodiment each made of aluminum, copper, silver or gold.
  • square shielding elements 6.2 for example, in each case between 10 ⁇ to 200 ⁇ , in particular 50 ⁇ . Through this small distance
  • the shielding elements 6.2 each have a thickness of between 1 ⁇ and 100 ⁇ , in particular 5 ⁇ .
  • the slot insulations 6 protrude out of their grooves 3, for example in the axial direction x with respect to the stator axis 4.
  • the shielding elements 6.2 of the slot insulation 6 can additionally exert a shielding effect in a region between a winding head of the stator 1 and a short-circuit ring of the rotor 8, since in this way a capacitive coupling between the rotor
  • Winding the stator 1 and the short-circuit ring or the balance disk or parts of the rotor 8 is prevented.
  • FIG. 3 shows a plan view of a slot insulation folded sheet for forming the slot insulation 6 according to the first exemplary embodiment.
  • the folded sheet has the support element 6.1, wherein on the support element 6.1 rectangular or
  • Figure 5 shows a sectional view of a stator according to the invention according to a second embodiment
  • Figure 6 shows a plan view of one of the grooves of a stator according to the invention according to the second embodiment.
  • the second exemplary embodiment differs from the first exemplary embodiment in that a single, strip-shaped shielding element 6.2 is provided on at least one of the slot insulation 6, which has a width B1 measured transversely to the axial direction x, that is to say in a direction z, which is smaller in each case is as the width B2 of the slot opening 3.2 of the associated groove 3, and which is electrically connected via at least one, for example, two webs 10 with the stator lamination 2.
  • the shielding element 6.2 is thereby electrically connected exclusively via the at least one web 10 to the laminated stator core 2, wherein the at least one web 10 has a width B3 measured in the axial direction x with respect to the stator axis 4, which corresponds to the thickness D of one or more laminations of the Stator laminations 2 may correspond and, for example, in the range between 3 millimeters and 5 centimeters.
  • the shielding 6.2 are each designed as a continuous, rectangular strip on which, for example, the webs 10 are provided centrally and on both sides.
  • the at least one web 10 of the shielding 6.2 protrudes as in the first embodiment under the tooth tips 1 .2 of the respective groove 3 and is contacted in this way at the shoulders of the tooth tips 1 .2 electrically.
  • An axial length of the webs 10 measures a maximum of 5% of the laminated core length in the axial direction x.
  • FIG. 7 shows a plan view of a slot insulation folded sheet for forming the slot insulation 6 according to the second exemplary embodiment.
  • the folded sheet has the carrier element 6.1, wherein a shielding element 6.2 is arranged on the carrier element 6.1.
  • the shielding 6.2 has a shape that as a
  • Folding sheets are folded to obtain a slot insulation 6, as shown in Figure 8, for a stator.
  • Carrier element 6.1 takes place in the region of the groove bottom 3.1 as soon as the slot insulation 6 is inserted into a stator slot. Alternatively, overlapping can also take place in the region of the slot opening 3.2.
  • FIG. 9 shows an alternative slot insulation folded sheet.
  • the slot insulation folding sheet has the carrier element 6.1, wherein a shielding element 6.2 is arranged on the carrier element 6.1.
  • the shielding 6.2 has a rectangular base.
  • the shielding element 6.2 has a first region 1 1, which is formed higher or thicker than second regions 12, which are formed flatter or thinner.
  • the first region 1 1 has a shape that is formed as a plus sign or as a cross.
  • flat areas 12 is an additional insulation layer 6.3. arranged or applied.
  • the folded sheet can be folded to achieve a slot insulation 6 for a stator.
  • FIG. 10 shows a further alternative slot insulation folding sheet.
  • the slot insulation folding sheet is designed such that overlapping of parts 6.1 .1 and 6.1 .2 of the support element 6.1 occurs in the region of the slot opening 3.2 as soon as the slot insulation 6 is inserted into a groove of the stator ,
  • Figure 1 1 shows a plan view of one of the grooves of a stator according to the invention according to another embodiment. The further
  • Embodiment combines features of Figures 2 and 5.
  • the stator 1 has a plurality of shielding elements 6.2, which are arranged one behind the other in the axial direction x with respect to the stator axis 4.
  • Each of the shielding element 6.2 has a width B1 measured transversely to the axial direction x.
  • the measured width B1 is in each case smaller than the width B2 of the slot opening 3.2 of the associated groove 3.
  • the shielding element 6.2 is electrically connected to the stator laminated core 2 via at least one, for example two webs 10.
  • the shielding element 6.2 is thereby electrically connected exclusively via the at least one web 10 to the laminated stator core 2, wherein the at least one web 10 has a width B3 measured in the axial direction x with respect to the stator axis 4, which corresponds to the thickness D of one or more laminations of the
  • Stator laminations 2 may correspond and, for example, in the range between 3 millimeters and 5 centimeters.
  • the shielding 6.2 are each designed as a single rectangular strip on which, for example, the webs 10 are provided centrally and on both sides.
  • the at least one web 10 of the shielding 6.2 protrudes, as in the first embodiment, under the tooth heads 1 .2 of the respective groove 3 and is contacted in this way at the shoulders of the tooth tips 1 .2 electrically.
  • FIG. 12 shows a sectional view of a stator according to the invention of an electric machine according to a further exemplary embodiment.
  • the parts 6.1 .1 and 6.1 .2 of the carrier element 6.1 are arranged such that the overlap is arranged in the region of the slot opening 3.2.
  • the shielding 6.2 is still arranged in the region of the slot opening 3.2.
  • the shield 6.2 is located at the opposite end to the overlapping region 9 of the slot insulation 6.
  • the first leg 6.1 .1 completely overlaps the second leg 6.1.2, wherein the first
  • Shielding element 6.2 extends on one side to approximately half the height of the right side edge 3.4 of the groove 3. This provides a further alternative embodiment for the slot insulation 6 allows.

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

Abstract

La présente invention concerne un stator (1) d'une machine électrique, doté d'un noyau feuilleté de stator (2) présentant un axe de stator (4) et de nervures (3) disposées dans le noyau feuilleté de stator (2). Les nervures (3) comprennent chacune un fond de nervure (3.1) et une ouverture de nervure (3.2) en forme de fente disposée à l'opposé du fond de nervure (3.1). Un élément porteur (6.1) isolant électrique d'une isolation de nervure (6) est disposé dans chaque nervure (3), ledit élément porteur logeant une pluralité de conducteurs électriques (5) d'un enroulement électrique. Au moins un élément de blindage (6.2), de l'isolation de nervure (6), conducteur et disposé du côté de l'ouverture de nervure, est disposé sur l'élément porteur (6.1). Le stator est caractérisé en ce que l'élément porteur (6.1) est formé d'une seule pièce et se recouvre dans une zone (9), l'élément porteur (6.1) formant, par le biais du recouvrement, une section transversale fermée.
PCT/EP2018/074572 2017-10-16 2018-09-12 Stator et machine électrique pourvue d'un stator WO2019076543A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880067287.6A CN111194515B (zh) 2017-10-16 2018-09-12 定子和具有定子的电机

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017218451.5A DE102017218451A1 (de) 2017-10-16 2017-10-16 Stator und elektrische Maschine mit Stator
DE102017218451.5 2017-10-16

Publications (1)

Publication Number Publication Date
WO2019076543A1 true WO2019076543A1 (fr) 2019-04-25

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ID=63557489

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/074572 WO2019076543A1 (fr) 2017-10-16 2018-09-12 Stator et machine électrique pourvue d'un stator

Country Status (3)

Country Link
CN (1) CN111194515B (fr)
DE (1) DE102017218451A1 (fr)
WO (1) WO2019076543A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021201993A1 (de) * 2021-03-02 2022-09-08 Robert Bosch Gesellschaft mit beschränkter Haftung Stator für eine elektrische Maschine, elektrische Maschine, Verfahren zur Herstellung eines Stators sowie Verwendung eines Isolationspapiers
EP4322378A1 (fr) * 2022-08-11 2024-02-14 Valeo eAutomotive Germany GmbH Stator pour une machine électrique et machine électrique permettant d'entraîner un véhicule

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5515983U (fr) * 1978-07-17 1980-01-31
US20090267441A1 (en) * 2008-02-14 2009-10-29 Hitachi, Ltd. Rotating Electrical Machine
DE102010063262A1 (de) * 2010-12-16 2012-06-21 Siemens Aktiengesellschaft Dynamoelektrische Maschine
JP2013143819A (ja) * 2012-01-10 2013-07-22 Toyota Motor Corp ステータの製造方法及びステータ
JP5518129B2 (ja) * 2012-05-11 2014-06-11 日立オートモティブシステムズ株式会社 回転電機及び回転電機の固定子
DE102015215588A1 (de) * 2015-08-14 2017-02-16 Robert Bosch Gmbh Stator einer elektrischen Maschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5682603B2 (ja) * 2012-08-10 2015-03-11 株式会社デンソー 車両用回転電機の固定子
CN102938592B (zh) * 2012-10-23 2015-03-18 陕西航空电气有限责任公司 一种加厚电机绕组槽绝缘的加工方法
EP2824801A1 (fr) * 2013-07-12 2015-01-14 Siemens Aktiengesellschaft Procédé de fabrication d'une machine rotative dynamoélectrique et machine rotative dynamoélectrique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5515983U (fr) * 1978-07-17 1980-01-31
US20090267441A1 (en) * 2008-02-14 2009-10-29 Hitachi, Ltd. Rotating Electrical Machine
DE102010063262A1 (de) * 2010-12-16 2012-06-21 Siemens Aktiengesellschaft Dynamoelektrische Maschine
JP2013143819A (ja) * 2012-01-10 2013-07-22 Toyota Motor Corp ステータの製造方法及びステータ
JP5518129B2 (ja) * 2012-05-11 2014-06-11 日立オートモティブシステムズ株式会社 回転電機及び回転電機の固定子
DE102015215588A1 (de) * 2015-08-14 2017-02-16 Robert Bosch Gmbh Stator einer elektrischen Maschine

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Publication number Publication date
CN111194515B (zh) 2022-08-30
DE102017218451A1 (de) 2019-04-18
CN111194515A (zh) 2020-05-22

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