EP3345284A1 - Stator à enroulement à barres isolé pour machine électrique - Google Patents

Stator à enroulement à barres isolé pour machine électrique

Info

Publication number
EP3345284A1
EP3345284A1 EP16744407.4A EP16744407A EP3345284A1 EP 3345284 A1 EP3345284 A1 EP 3345284A1 EP 16744407 A EP16744407 A EP 16744407A EP 3345284 A1 EP3345284 A1 EP 3345284A1
Authority
EP
European Patent Office
Prior art keywords
stator
rod
groove
grooves
hose member
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Withdrawn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
EP16744407.4A
Other languages
German (de)
English (en)
Inventor
Bodo Von Moltke
Nurdin PITAREVIC
Aleksandr VASSILJEV
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.)
Vitesco Technologies GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP3345284A1 publication Critical patent/EP3345284A1/fr
Withdrawn legal-status Critical Current

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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/30—Windings characterised by the insulating material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines

Definitions

  • the invention relates to a stator for an electric Ma ⁇ machine, an electric machine with the inventive stator, a motor vehicle and a method of manufacturing the stator.
  • the stator has a laminated core with grooves, in each of which at least one electrically conductive rod is arranged, the entirety of the rods representing electrical windings of the stator.
  • Each rod is insulated by means of an electrical insulation element against the laminated core.
  • each electrically conductive rod is coated with an electrically insulating paint.
  • the rod is installed in the groove of the laminated core and fixed by means of an insulating paper.
  • the insulation ⁇ paper is impregnated with a potting compound, namely an impregnating resin.
  • the rod is fixed in the groove and insulated against the laminated core.
  • the invention is based on the object, an efficiently producible electric machine especially for a
  • the invention provides a stator for an electrical machine.
  • the stator has a laminated core with grooves which extend in the axial direction of the stator. The axial direction is aligned along the intended rotational axis of the rotor to be arranged in the stator.
  • the stator further comprises electrically conductive, electrical windings of the stator performing rods, each of which at least one is arranged in one of the grooves.
  • the stator has a bar winding.
  • two bars per groove are arranged and the bars mitei ⁇ interconnected to a two-layer winding.
  • Each rod is electrically insulated from the laminated core by a respective electrical insulation element.
  • each rod is designed as a hose member which is formed from a thermoplastic plastic and which encloses the respective rod.
  • each rod is surrounded or wrapped in length by the plastic.
  • each rod has a sheath made of the plastic.
  • each bar can be produced or made available separately together with its electrical insulation element.
  • Each rod can then be stuck together with its electrical insulation element finished in the groove. Then then no further processing steps are necessary to isolate the rod against the laminated core.
  • the invention also includes optional developments, by the characteristics of which additional benefits.
  • the plastic of the respective hose member is arranged by means of an extrusion method according to the ⁇ bib rod. In other words, the plastic is arranged or poured in the soft or flowable state by extrusion around the rod. This has the advantage that the rods can be successively provided mechanically with their respective electrical insulation element in a continuous or continuous extrusion process. This makes the production even more efficient.
  • a groove width of the respective groove in which the hose element is arranged at most 0.2 millimeters, in particular 0 millimeters, greater than an outer diameter of the hose member itself.
  • a development for this purpose provides that the rod is plastically and / or elastically bent in the groove and thereby has a mechanical stress that presses the hose member against a groove wall of the groove. This results in the advantage that a heat conduction between the laminated core and the rod is ensured or guaranteed.
  • the bending can be achieved, for example, by the described bending or bending of the rod ends, which protrude from the laminated core.
  • a wall thickness of the hose element of each rod is in a range of 0.1 millimeter to 0.5 millimeter.
  • the wall thickness is in a range of 0.1 millimeter to 0.5 millimeter.
  • the grooves are free of one
  • the plastic comprises, for example, a polyamide and / or a polyphenylene sulfone (PPSU) and / or a polyphthalamide (PPA) or it is formed therefrom.
  • PPSU polyphenylene sulfone
  • PPA polyphthalamide
  • each bar is made of copper. This results in an electrical conductivity that is suitable for providing the winding. Furthermore, the deformability of the rod is additionally ensured in order to press the plastic of the hose member by a deflection of each rod against a groove wall.
  • the invention also includes an electric machine having an embodiment of the stator according to the invention.
  • a rotor of the electric machine is rotatably mounted.
  • the electric machine can be manufactured with particularly little Ar ⁇ beits Colouren, since the stator in the manner described can be manufactured by common, simultaneous insertion of the bars together with their insulation member in the lamination stack and then bending of the rod ends.
  • the electrical Ma ⁇ machine as a starter generator for a motor vehicle or Electric motor is designed for a brake assist system of a motor vehicle.
  • the stator which is produced in the manner according to the invention, has sufficient heat transfer between the rods and the Bleckb, so that in particular the missing potting compound is no disadvantage.
  • the invention also includes a motor vehicle in which the electrical machine is provided or arranged in the manner described.
  • the invention also provides a method for producing an embodiment of the stator according to the invention.
  • a laminated core is provided with grooves which extend in a be ⁇ known manner in the axial direction of the stator.
  • At least one electrically conductive rod is be ⁇ riding provided for each groove.
  • two rods per groove are provided.
  • each rod provided is surrounded by a tubular element formed of a thermoplastic plastic, which represents the already described electrical insulation element.
  • Each bar is along with the ge ⁇ puts it in each case by ⁇ imaging tube element in each corresponding groove. In other words, therefore, after the insertion of each rod in the respective groove at the same time also the electrical
  • a further development provides that for the provision of the rods a wire is provided around which the plastic is arranged by means of an extrusion method.
  • the wire and the plastic are cut into the bars and hose elements.
  • a role with the wire, which is already covered by the plastic are provided.
  • each bar can be provided in an automated manner.
  • the plastic may be arranged continuously along the wire. In order then to provide the hose elements, it can be provided that ends of the bars are stripped, that is, the plastic is removed.
  • the wire may be, for example, a round wire or a flat conductor.
  • each rod can advantageously be inserted together with its respective tubular element into one of the grooves according to an embodiment.
  • the hose element adheres in particular to the rod, so that an adjustment of each
  • Hose element in the groove is unnecessary or can be omitted.
  • a further embodiment provides that each rod inserted into one of the grooves is deformed by bending and thereby the respective tubular element of the rod is pressed against a groove wall of the respective groove. This results in a
  • FIG. 1 shows a schematic representation of a perspective view
  • FIG. 1 shows a schematic representation of the stator of FIG. 1, wherein only a single electric coil is shown, FIG.
  • Fig. 3 is a schematic representation of a cross section of the
  • Fig. 4 is a schematic representation of a perspective
  • Fig. 5 is a schematic representation of a side view of the
  • Fig. 6 is a schematic representation of a cross section of the
  • Fig. 7 is a schematic representation of an embodiment of the motor vehicle according to the invention.
  • the exemplary embodiment explained below is a preferred embodiment of the invention.
  • the described components of the embodiment each represent individual features of the invention that are to be considered independently of one another, which also each independently further develop the invention and thus also individually or in a different combination than the one shown as part of the invention.
  • the described embodiment can also be supplemented by further features of the invention already described.
  • Fig. 1 shows a stator 1 for an electric machine.
  • the stator 1 may be provided, for example, for a starter-generator of a motor vehicle.
  • the stator 1 has a laminated core 2 which, in a manner known per se, consists of soft-magnetic sheet metal layers (coercive field strength less than 1000 A / m). 0
  • conductor elements 6, 7 may be formed, which are electrically insulated from each other and stacked or layered along an axial direction 3.
  • conductor elements 6, 7 have been inserted in each case by an axial slot opening.
  • the conductor elements 6, 7 of each groove 4 are arranged in alignment in a radial direction 8 one behind the other.
  • the radial direction 8 is in each case directed perpendicularly outward from an axis 9, by which the axial direction 3 is fixed.
  • the axis 9 corresponds to the intended rotational axis of a rotor which can be arranged in the stator.
  • the different radial distances between the conductor elements 6, 7 result in two rings or layers 10, 11, the radially outer conductor elements 6 representing the layer 10 and the radially inner conductor elements 7 the layer 11.
  • the layers 10, 11 are part of a two-layer winding 12 of the stator 1.
  • the two-layer winding 12 comprises in the example shown six electric coils, each of which results by interconnecting a respective subset of the conductor elements 6, 7.
  • a conductor element of the outer layer 10 and a conductor element of the inner layer 11 forms a phase terminal or coil terminal 13 of one of the coils.
  • the coil terminals 13 of a coil are each arranged in a connection region 14.
  • Fig. 2 shows by way of illustration a single electrical coil 15. The illustration in Fig.
  • FIG. 2 corresponds to the illustration in Fig. 1, wherein all those conductor elements 6, 7 are hidden, which belong to the other electric coils.
  • the coil 15 shown in FIG. 2 has a total of three loops or turns 16, which are electrically interconnected within the interconnection region 14 by a winding connection 17. _
  • the conductor members 6 of the outer layer 11 have been chamfered or bent along a circumferential direction U L, while the conductor members 7 of the inner layer 11 have been bent in an opposite circumferential direction U 2.
  • the conductor elements 6, 7 of the two layers 10, 11 are entangled with each other, so that a skew region has a helix angle with respect to
  • End face 18 has.
  • the conductor ends further comprise conductor ends which are aligned parallel to the axis 9.
  • the conductor ends have for this purpose a crank.
  • the helix angles of all helical regions of the conductor ends are the same. As a result, the conductor ends are particularly close together.
  • the conductor ends are part of a winding head 20 on the end face 18 of the laminated core 2.
  • FIG. 3 shows how the electrical conductor elements 6, 7 are electrically insulated in the interior of the laminated core against the soft-magnetic sheet metal layers of the laminated core 2.
  • Each conductor element 6, 7 is formed from an electrically conductive rod 21 and an electrical insulation element 22.
  • Fig. 4 shows once again a single electrical conductor element 6, 7 in isolation with the electrically conductive rod 21 and the electrical insulation element 22.
  • the rod 21 may each be a flat conductor or a flat wire.
  • a material of the rod 21 may e.g. Be copper.
  • the electrical insulation element 22 is configured as a casing or hose element 23.
  • Fig. 3 illustrates how each rod 21 is electrically insulated from the laminated core 2 by the material of the hose element 23 by means of the insulating element 22.
  • the hose element 23 is formed from a thermoplastic material, which may comprise, for example, a polyamide and / or PPSU and / or a PPA.
  • FIG. 3 further illustrates how, due to the entanglement or bending in the region of each winding head 20 shown in FIG. 1, each rod 21 presses the respective hose element 23 against a groove wall 24 of the respective groove 4, the rod 21 being mechanically distorted or bent.
  • the plastic of the hose member 23 may have been applied to the rod 21 by an extrusion process.
  • Extrusion arrangement (not shown) out. This contains an annular gap from which the plastic exits in a deformable or liquid or flowing state. This creates a tube that applies to the rod 21 or the wire.
  • Fig. 5 shows how, when manufacturing the rod 21 from a wire, this wire is divided into rods 21 having the rod length 25.
  • stripped ends 26 are formed by stripping or removing from the rod 21 the plastic of the hose member 23 so that each hose member 23 has an insulation length 27 smaller than the rod length 25.
  • a rod length can e.g. in a range of for example 8 centimeters to 15 centimeters.
  • Figure 6 illustrates how the rod 21 surrounds the rod 21 with the plastic, the tubular member 23 having a layer thickness or wall thickness 28 which may be in the range of 0.1 millimeter to 0.5 millimeter.
  • edges 29 of the rod 26 have curves or a radius of curvature 30 which is in a range of 0.5 millimeters to 1.5 millimeters. This results in the advantage that the hose member 23 is not cut or cut by the edge 29 during vibration movements.
  • FIG. 7 illustrates how an electric machine 34 can be provided by means of the stator 1.
  • a rotor 35 is rotatably mounted in the stator 1.
  • the rotor 35 is rotatably connected to a shaft 36.
  • the electric machine 34 may be installed, for example, in a motor vehicle 37.
  • the motor vehicle 37 may be, for example, a motor vehicle, in particular a passenger car or truck.
  • the shaft 36 may be coupled to a vehicle component 38, which may be, for example, an internal combustion engine or a pump for a hydraulic brake circuit of a brake assist system.
  • the electric machine 34 can be driven in a manner known per se by alternately energizing the electric coils of the stator 1 by means of an inverter or inverter. This creates a magnetic rotating field in the stator, which drives the rotor 35. The rotor 35 then rotates about the axis 9.
  • the example shows how one can provide by extrusion on ⁇ placed plastic coating, an electrical insulation of the copper rods of a stator.
  • the art ⁇ material layer thickness can thus be selectively adjusted, that can be extruded or extruded rod pin installed directly in the groove 4 of the laminated core 2 and then folded or bent or vertwistet.
  • the advantage over the prior art is that the costly process of
  • Groove insulation can be omitted.
  • the further advantage is that the damage of the insulation paper or an insulating lacquer layer on the rod also can not occur.
  • the tubular element of the thermoplastic material is flexible and adapts to the shape of the rod when bending or vertwist.
  • the hose element made of plastic also has sufficient mechanical strength and the layer thickness of the plastic coating can still be chosen sufficiently low.
  • stator 1 can be manufactured in a shorter period of time.
  • the applied by extrusion plastic coating has improved mechanical strength compared to a coating of the rods 21 with an electrically insulating paint and subsequent fixation of the rods in the grooves 4 by means of insulating paper and potting compound.
  • thermoplastic sheath of flat conductors for the production of motor windings.

Landscapes

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

Abstract

L'invention concerne un stator (1) pour une machine électrique (34), comprenant un noyau feuilleté (2) qui présente des encoches (4) qui s'étendent dans la direction axiale (3) du stator (1). Le stator (1) comprend par ailleurs des barres (21) électriquement conductrices qui forment les enroulements électriques du stator (1) et qui sont disposées au moins une par une dans une encoche (4) respective, chaque barre (21) étant isolée électriquement vis-à-vis du noyau feuilleté par un élément d'isolation électrique (22) respectif. La fabrication de ce stator (1) doit être efficace. À cet effet, chaque élément d'isolation électrique (22) se présente sous la forme d'un élément tubulaire (23) qui est constitué d'une résine thermoplastique et qui entoure la barre (21).
EP16744407.4A 2015-09-03 2016-07-27 Stator à enroulement à barres isolé pour machine électrique Withdrawn EP3345284A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015216840.9A DE102015216840A1 (de) 2015-09-03 2015-09-03 Stator mit isolierter Stabwicklung für eine elektrische Maschine
PCT/EP2016/067946 WO2017036687A1 (fr) 2015-09-03 2016-07-27 Stator à enroulement à barres isolé pour machine électrique

Publications (1)

Publication Number Publication Date
EP3345284A1 true EP3345284A1 (fr) 2018-07-11

Family

ID=56550891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16744407.4A Withdrawn EP3345284A1 (fr) 2015-09-03 2016-07-27 Stator à enroulement à barres isolé pour machine électrique

Country Status (4)

Country Link
EP (1) EP3345284A1 (fr)
CN (1) CN107852056B (fr)
DE (1) DE102015216840A1 (fr)
WO (1) WO2017036687A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3525322A1 (fr) 2018-02-08 2019-08-14 Siemens Aktiengesellschaft Enroulement à barre pour un stator d'une machine tournante électrique
AT521301B1 (de) 2018-05-29 2020-04-15 Miba Ag Stator mit Isolationsschicht
WO2019227116A1 (fr) 2018-05-29 2019-12-05 Miba Aktiengesellschaft Conducteur électrique à utiliser dans des machines électriques
DE102019113789A1 (de) * 2019-05-23 2020-11-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Stator einer elektrischen Maschine
DE102019113785A1 (de) 2019-05-23 2020-11-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Stator einer elektrischen Maschine
DE102021115010B4 (de) 2021-06-10 2023-02-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zur Herstellung eines Stators einer elektrischen Maschine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE363921B (fr) * 1972-06-12 1974-02-04 Asea Ab
US20050077075A1 (en) * 2003-10-09 2005-04-14 Yu Wang Flexible stator bars
JP4502041B2 (ja) * 2008-04-24 2010-07-14 株式会社デンソー 回転電機の固定子およびその製造方法
US8841811B2 (en) * 2010-08-18 2014-09-23 Remy Technologies Llc Conductor insulation arrangement for an electric machine
US8097996B1 (en) * 2011-06-24 2012-01-17 Dantam K Rao Thermally conductive ground wall insulation for a stator bar
DE202012000842U1 (de) * 2012-01-26 2012-02-03 Continental Automotive Gmbh Rotor für eine rotierende elektrische Maschine und Elektromotor
WO2013110652A1 (fr) * 2012-01-26 2013-08-01 Continental Automotive Gmbh Rotor pour machine électrique tournante et machine électrique tournante
WO2014056547A1 (fr) * 2012-10-12 2014-04-17 Siemens Aktiengesellschaft Procédé d'isolation d'un conducteur électrique
DE102013225130A1 (de) * 2013-12-06 2015-06-11 Continental Automotive Gmbh Wicklungssegment zur Bildung einer Wicklung einer elektrischen Maschine, Verfahren zur Herstellung eines Wicklungssegments

Also Published As

Publication number Publication date
WO2017036687A1 (fr) 2017-03-09
CN107852056A (zh) 2018-03-27
DE102015216840A1 (de) 2017-03-09
CN107852056B (zh) 2020-10-09

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