WO2023111074A1 - Stator pour machine triphasée rotative - Google Patents

Stator pour machine triphasée rotative Download PDF

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Publication number
WO2023111074A1
WO2023111074A1 PCT/EP2022/085948 EP2022085948W WO2023111074A1 WO 2023111074 A1 WO2023111074 A1 WO 2023111074A1 EP 2022085948 W EP2022085948 W EP 2022085948W WO 2023111074 A1 WO2023111074 A1 WO 2023111074A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
coil
stator coil
connection
arrangement
Prior art date
Application number
PCT/EP2022/085948
Other languages
German (de)
English (en)
Inventor
Ernst August Werner
Bernhard Burkhart
Original Assignee
ENGIRO 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 ENGIRO GmbH filed Critical ENGIRO GmbH
Publication of WO2023111074A1 publication Critical patent/WO2023111074A1/fr

Links

Classifications

    • 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
    • H02K3/28—Layout of windings or of connections between windings
    • 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
    • H02K15/06—Embedding prefabricated windings in machines
    • H02K15/062—Windings in slots; salient pole windings
    • H02K15/064—Windings consisting of separate segments, e.g. hairpin windings
    • 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
    • H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations

Definitions

  • the present invention relates to a stator for a rotating induction machine according to the preamble of claim 1 and a rotating induction machine with such a stator according to claim 11.
  • the induction machine in question can be used for a large number of applications.
  • Exemplary applications are electric motors and generators for land, air and water vehicles.
  • Other use cases can be found in the field of industrial automation and power generation.
  • the well-known stator of an induction machine shows the usual structure of a stator base body with stator slots which are distributed around a geometric machine axis assigned to the stator.
  • the stator slots accommodate a stator coil arrangement with a plurality of stator coils, which are each formed from a plurality of dimensionally stable hairpins connected in series.
  • the stator coils are firmly combined into three coil strands by mechanically and electrically connecting the hairpins on the back of the stator.
  • the three strands of coils can be connected to the phases of a rotating supply voltage to generate a rotating magnetic field.
  • the above hairpin technology is increasingly finding its way into modern stator windings, because the dimensionally stable hairpins can easily be automated compared to traditional winding technology. Furthermore, with a suitable selection of the cross section of the hairpins, the line density in the individual stator slots is comparatively high. However, the flexibility in connecting the individual coils is extremely low.
  • the invention is based on the problem of designing and developing the known stator in such a way that the flexibility in the connection of the individual coils is increased with little effort.
  • the above problem is solved in a stator according to the preamble of claim 1 by the features of the characterizing part of claim 1.
  • connection pins in addition to the hairpins, dimensionally stable connection pins can also be provided, which can be electrically interconnected via an interconnection arrangement on the front side of the stator. This results in almost unlimited flexibility when connecting the stator coils, as shown below.
  • each stator slot in the stator base body in relation to the machine axis, extends axially from a front side of the stator to a rear side of the stator and radially from a stator inside to a stator outside.
  • the stator has a stator coil arrangement which runs at least partially in the stator slots and which can be connected to a rotary supply voltage in order to generate a rotary magnetic field.
  • the stator coil arrangement forms a plurality of stator coil strands, each consisting of a plurality of stator coils, each of which has a coil width of at least two stator slots, the stator coil strands being connectable to a rotary supply voltage to generate a rotary magnetic field.
  • the stator coils each have a plurality of coil turns, with each stator coil being formed from a plurality of series-connected, dimensionally stable hairpins of the first type, each of which has two hairpin legs protruding from a connecting leg, at least in part in the manner of a U-shape.
  • the hairpin legs of the hairpins of the first type run, starting from the connecting leg, from the front of the stator to the rear of the stator in the stator slots.
  • the hairpin legs are mechanically and electrically connected on the rear side of the stator to generate the coil windings.
  • stator coils is additionally assigned at least one dimensionally stable, single-leg connection pin, which runs from the front of the stator to the rear of the stator and which is mechanically and electrically connected to the coil start or the coil end of the respective stator coil on the rear of the stator.
  • This coil attachment is preferably fang or this coil end is electrically connected exclusively to the associated connection pin.
  • connection pins it is preferably the case that a plurality of such dimensionally stable connection pins are provided.
  • the term “several” should always be understood to mean that more than two of the relevant entities, here more than two connection pins, are provided.
  • stator has an interconnection arrangement on the front side of the stator, via which the connection pins are interconnected to define the stator coil strands and/or to the rotary supply voltage to generate the rotary magnetic field.
  • stator coil strands via the interconnection arrangement means that the interconnection of the connection pins via the interconnection arrangement produces a resultant interconnection of the relevant stator coils to form a stator coil strand.
  • generation of the rotary magnetic field via the interconnection arrangement means that the interconnection of the connection pins via the interconnection arrangement generates a resulting interconnection of the stator coils with the rotary supply voltage and thus a resulting rotary magnetic field.
  • connection pin it has been possible to guide the coil beginning and/or the coil end of the stator coils to the front side of the stator in a targeted manner by means of a connection pin, so that the interaction of the interconnection arrangement with the connection pins enables a particularly flexible interconnection of the connection pins and thus of the stator coil.
  • the preferred configurations according to claims 2 to 6 relate to preferred structural combinations of the stator coils in order to produce, for example, a stator coil module from two stator coil groups connected in series or in parallel, in particular wound in opposite directions and thus energized in opposite directions.
  • the stator coil assembly has a plurality of such stator coil modules along of the circumference of the stator are distributed in the stator slots. An arrangement of stator coils that repeats itself over the circumference of the stator can thus be produced.
  • the further preferred configurations according to claims 8 and 9 relate to advantageous variants for the wiring arrangement on the front side of the stator.
  • a particularly high degree of flexibility results from the fact that at least part of the interconnection arrangement can be placed on the stator, as a result of which the at least one connection pin can be electrically interconnected and/or connected to the phases of the rotary supply voltage. It is easy to imagine that the use of different wiring arrangements leads to flexible modifiability of the wiring of the stator coils.
  • a rotating induction machine with a proposed stator and a rotor is claimed.
  • the rotor can have, for example, a corresponding permanent magnet arrangement for the interaction with the stator coil arrangement.
  • FIG. 1 shows a proposed stator a) looking at the front side of the stator and b) looking at the rear side of the stator,
  • FIG. 2 shows a stator coil of the stator coil arrangement of the stator according to FIG. 1 in a perspective view
  • FIG. 3 shows a stator coil module of the stator coil arrangement of the stator according to FIG. 1, in which a) the hairpin of the first type is exposed b) the circuit pin is exposed, c) the hairpin of the second type is exposed and d) a part of the circuit arrangement is exposed,
  • FIG. 4 shows the coil module according to FIG. 3 a) without the stator base body and b) with the stator base body
  • FIG. 5 shows the wiring arrangement of the stator according to FIG. 1 in the dismantled state a) from the front and b) from the rear,
  • the stator 1 shown in FIG. 1 can be used for a wide range of rotating induction machines, in particular electric motors and generators. This includes, for example, synchronous machines that can be self-excited or externally excited, asynchronous machines or the like.
  • the stator 1 preferably has a hollow stator interior 2 for accommodating a rotor (not shown).
  • the rotor can also be arranged outside of the stator 1 if the induction machine is an external rotor. Then the stator interior 2 can even be dispensed with.
  • the stator 1 shows a metallic stator base body 3 , with the stator 1 being assigned a geometric machine axis 4 and stator slots 5 distributed around it in the stator base body 3 .
  • Each stator slot 5 extends, in relation to the machine axis 4, axially from a stator front 6 to a stator rear 7 and radially from a stator inside 8 to a stator outside 9.
  • the stator 1 has a stator coil arrangement 10, which is at least partially in the stator slots 5 runs.
  • the stator coil assembly 10 serves to generate a rotary magnetic field that interacts with a rotor above.
  • the stator coil arrangement 10 forms electromagnetic poles in the energized state, the formation of which tion depends on the structure of the stator coil assembly 10.
  • the proposed solution can be mapped with different structures for the stator coil arrangement 10 .
  • the stator coil arrangement 10 forms several, here and preferably three, stator coil strands 11, 12, 13, each consisting of several stator coils 14-17, each of which has a coil width 18 of at least two stator slots 5, here six stator slots 5.
  • stator coil assembly is to be interpreted broadly in the present case. It includes any interconnection of a number of stator coils 14-17.
  • the stator coil strands 11, 12, 13 can be connected to a rotary supply voltage u, v, w to generate the rotary magnetic field.
  • the rotating supply voltage u, v, w can be a supply voltage with any number of phases, but preferably with three phases.
  • a stator coil 14-17 is shown as such in FIG.
  • the coil cross section of the stator coil 14-17 can be set within a wide range within the scope of the proposed solution.
  • stator coils 14-17 each have a plurality of coil windings 19, with each stator coil 14-17 being formed from a plurality of series-connected, dimensionally stable, two-legged hairpins of the first type 20.
  • the hairpins of the first type 20 each have two hairpin legs 22, 23 protruding from a connecting leg 21, at least in part in the manner of a U-shape.
  • the hairpin legs 22, 23 of the hairpins of the first type 20 run, starting from the connecting leg 21, from the front side 6 of the stator to the rear side 7 of the stator in the stator slots 5. They are mechanically and electrically connected on the rear side 7 of the stator, in particular welded. This can best be seen from the representation according to FIG.
  • stator coils 14-17 of the coil arrangement preferably several stator coils 14-17, more preferably more than half of the stator coils 14-17, more preferably all stator coils 14-17, additionally have at least one dimensionally stable, single-leg connection pin 24-29 is assigned, which runs from the stator front 6 to the stator rear 7 and on the stator rear 7 with the coil beginning or the coil end of the respective stator coil 14-17 is mechanically and electrically connected.
  • 2 shows by way of example that the beginning of the coil or the end of the coil in question is routed to the front of the stator 6 via the connection pin 24-29 in question, so that the beginning of the coil or the end of the coil in question can be connected from the front of the stator 6.
  • connection pin 24-29 is preferably designed in such a way that it projects beyond the stator coil arrangement 10 on the front side of the stator 6, preferably in the axial direction in relation to the machine axis 4, so that simple interconnection by means of the interconnection arrangement 30 is possible.
  • connection pins 24-29 are single-legged.
  • the shape of the connection pin 24-29 without the overhang preferably corresponds essentially to the shape of half a hairpin of the first type 20 when the hairpin of the first type 20 is divided into two equal halves along an axial line of symmetry.
  • the hairpins of the first type 20 and the connection pins 24-29 can be produced using the same production technology, in particular bending technology.
  • the hairpins of the first type 20 and the connection pins 24-29 can be manufactured on the same production line.
  • the stator 1 has a wiring arrangement 30 on the front side 6 of the stator, via which the connection pins 24-29 are connected to one another to define the stator coil strands 11-13 and/or to the rotary supply voltage u, v, w to generate the rotary magnetic field .
  • the interconnection arrangement 30 can be composed of a plurality of individual, bridge-like electrical conductors. A particularly simple interconnection results from the fact that the interconnection arrangement 30 is designed to be continuous and can therefore be handled individually.
  • the stator 1 preferably has a plurality of stator coil groups 31 , 32 , a stator coil group 31 , 32 being defined in that the stator coil group 31 , 32 has a first stator coil 14 and a second stator coil 15 connected in series or parallel thereto.
  • a stator coil group 31, 32 can have more than two stator coils 14, 15.
  • the stator coil group 31, 32 is a pair of stator coils 31, 32 made up of the first stator coil 14 and the second stator coil 15.
  • the term “group” can therefore preferably be replaced by the term “pair” throughout the following.
  • first stator coil 14 and the second stator coil 15 are arranged offset from one another by exactly one stator slot 5 .
  • This offset can also include several stator slots 5 .
  • the first stator coil 14 and the second stator coil 15 are preferably wound in the same direction, with the coil end of the first stator coil 14 and the coil start of the second coil 15 being assigned a connection pin 25, 26, and these two connection pins 25, 26 being used to produce the series connection or Parallel connection on the stator front 6 by means of the interconnection arrangement 30, in particular by means of a radial bridge 33, are connected.
  • the term "radial bridge” describes a bridge made of an electrical conductor that bridges a distance in relation to the machine axis 4 in the radial direction.
  • stator 1 has a plurality of stator coil modules 35-58 made up of at least one stator coil 14-17, preferably a plurality of stator coils 14-17.
  • stator coil module 35 Based on the stator coil module 35 is shown in Fig. 3a that the stator coil module 35 here and preferably by at least two series or parallel, in particular wound in opposite directions and thus energized in opposite directions, stator coil groups 31, 32, preferably a primary stator coil group 31 and a Secondary stator coil group 32 is formed.
  • stator coil groups 31, 32 are arranged offset from one another by a plurality of stator slots 5 and/or by a coil width 18.
  • the hairpin legs 61, 62 of the hairpins of the second type 59 run starting from the Connecting leg 60 from the front of the stator 6 to the rear of the stator 7 in the stator slots 5, the hairpin of the second type 59 on the rear of the stator 7 connecting the series connection or parallel connection between the stator coil groups 31, 32, in particular by connecting the coil end of the second coil 15 of the primary stator coil group 31 with the beginning of the coil of the first coil 16 of the secondary stator coil group 32 produces.
  • the hairpin of the second type 59 can be arranged not only in the area of the outside of the stator 9 (Fig. 3c), but also in the area of the inside of the stator 8 or at any point between the outside of the stator 9 and the inside of the stator 8 .
  • the hairpins of the first type 20 and/or the hairpins of the second type 59 and/or the connection pins 24-29 are each made of a dimensionally stable, elongated, metallic electrical conductor material, preferably made of copper. You can each have a largely arbitrary cross-section. In this case, square or rectangular cross sections are particularly advantageous since a particularly high line density in the stator slots 5 can be achieved with such cross sections.
  • the hairpins of the first type 20 and/or the hairpins of the second type 59 and/or the connection pins 24-29 are preferably bent into the relevant shape.
  • the hairpins of the first type 20 and/or the hairpins of the second type 59 and/or the connection pins 24-29 are also preferably made from the identical electrical conductor material, which simplifies the manufacture of these components.
  • connection pin 24-29 the coil end of the second coil 15 of the primary stator coil group 31 and the coil start of the first coil 16 of the secondary stator coil group 32 are each assigned a connection pin 24-29, with these connection pins 24-29 being used to generate the series connection or parallel connection between the stator coil groups 31 , 32 are connected by means of the interconnection arrangement 30, in particular by means of a tangential bridge.
  • tangential bridge describes a bridge made of an electrical conductor that bridges a distance in relation to the machine axis 4 in the tangential direction.
  • the stator coil modules 35-58 each provide at least two module terminals 63, 64 for connection to the rotary supply voltage u, v, w, as shown for the stator coil module 35 in Figure 3a.
  • a connection pin 24 is assigned to the coil start of the first coil 14 of the primary coil group 31 for each stator coil module 35-58, while a further connection pin 29 is assigned to the coil end of the second coil 17 of the secondary coil group 32.
  • These connection pins 24, 29 provide the module connections 63, 64 of the respective stator coil module 35-58 for connection to the rotating supply voltage u, v, w.
  • stator coil arrangement 10 preferably has a plurality of stator coil modules 35-58 which are distributed along the circumference of the stator 1 in the stator slots 5, the stator coil modules 35-58 being interconnected by the connection pins 24-29 by means of the interconnection arrangement 30 Stator coil strands 11, 12, 13 form.
  • the interconnection arrangement 30 preferably serves to connect the stator coil arrangement 10 to the rotary supply voltage u, v, w.
  • the interconnection arrangement 30 can be used to disconnect the coil strands 11, 12, 13 from the stator coil modules 35-58 via the module connections 63, 64 in a predetermined connection to the phases of the rotating supply voltage u, v, w.
  • the predetermined connection can be, for example, a delta connection according to FIG. 6 or a star connection according to FIG. 7, which additionally requires a plurality of star bridges 72 .
  • the star bridges 72 in Fig. 7 are part of the interconnection arrangement 30.
  • the interconnection arrangement 30 is designed here and preferably in a partially continuous manner.
  • the interconnection arrangement 30 has at least one connected interconnection ring 65 placed on the front side of the stator 6, via which the connection pins 24-29 are used to define the stator coil strands 11-13 with one another and/or to generate the rotating magnetic field with the rotating supply voltage u, v, w are interconnected. It is preferably the case that the interconnection ring 65 provides a radial bridge 33 and/or a tangential bridge 72 for at least some of the stator coil modules 35-58.
  • the interconnection ring 65 is used to connect the connection pins 24-29 to generate the rotary magnetic field with the rotary supply voltage u, v, w.
  • the interconnection ring 65 has at least three partial rings 66, 67, 68 , which are each electrically connected to one phase of the rotary supply voltage u, v, w and each have a connection extension 69, 70, 71 for electrical contact with the relevant connection pin 24-29.
  • the interconnection arrangement 30 can have at least one cohesive first-type interconnection ring placed on the front side of the stator 6, via which the connection pins 24-29 are interconnected to define the stator coil strands 11-13, and for the interconnection arrangement 30 to have at least one cohesive, on the front side of the stator 6 and/or on the first type of interconnection ring has an interconnection ring of the second type, via which the connection pins 24-29 for generating the rotary magnetic field are connected to the rotary supply voltage u, v, w.
  • a particularly cost-effective implementation of the proposed solution can be achieved in that the hairpins of the first type 20 of all the stator coils 14-17 are configured identically to one another.
  • provision can be made accordingly for the hairpins of the second type 59 of all the stator coil modules 35-58 to be configured identically to one another.
  • connection pins of all stator coils 14-17 are configured identically to one another.
  • the hairpins of the first type 20 and the hairpins of the second type 59 are shaped differently in order to be able to take account of the different geometric requirements.
  • a rotating induction machine (not shown) with a proposed stator 1 and a rotor which interacts magnetically with the stator coil arrangement 10 is claimed as such.
  • the induction machine can be an electric motor or generator. Any machine can types are used. Examples of this are synchronous machines, which can be self-excited or externally excited, asynchronous machines or the like.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

L'invention concerne un stator pour une machine triphasée rotative, comprenant un corps principal de stator (3), le stator (1) présentant un agencement de bobines de stator (10) qui s'étend au moins en partie dans des fentes de stator (5), l'agencement de bobines de stator (10) formant une pluralité de sections de bobines de stator (11-13), chacune composée d'une pluralité de bobines de stator (14-17), les sections de bobines de stator (11-13) pouvant être connectées à une tension d'alimentation triphasée (u, v, w) pour générer un champ magnétique rotatif, chaque bobine de stator (14-17) étant formée à partir d'une pluralité d'épingles à cheveux à deux branches, dimensionnellement stables, d'un premier type (20) qui sont connectées en série. Selon l'invention, il est proposé qu'au moins certaines des bobines de stator (14-17) présentent de plus au moins une broche de connexion monobranche (24-29) dimensionnellement stable qui s'étend du côté avant de stator (6) au côté arrière de stator (7) et, sur le côté arrière de stator (7), est connectée mécaniquement et électriquement au début de bobine ou à l'extrémité de bobine de la bobine de stator respective (14-17), et que le stator (1), sur le côté avant de stator (6), ait un agencement d'interconnexion (30) via lequel les broches de connexion (24-29) sont électriquement interconnectées les unes aux autres pour définir les sections de bobines de stator (11-13).
PCT/EP2022/085948 2021-12-14 2022-12-14 Stator pour machine triphasée rotative WO2023111074A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021006172.1 2021-12-14
DE102021006172.1A DE102021006172A1 (de) 2021-12-14 2021-12-14 Stator für eine rotierende Drehfeldmaschine

Publications (1)

Publication Number Publication Date
WO2023111074A1 true WO2023111074A1 (fr) 2023-06-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/085948 WO2023111074A1 (fr) 2021-12-14 2022-12-14 Stator pour machine triphasée rotative

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DE (1) DE102021006172A1 (fr)
WO (1) WO2023111074A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019126338A1 (de) * 2019-09-30 2021-04-01 Valeo Siemens Eautomotive Germany Gmbh Stator mit Pins für eine elektrische Maschine
WO2021065297A1 (fr) * 2019-09-30 2021-04-08 日本電産株式会社 Stator et moteur
FR3101736A1 (fr) * 2019-10-04 2021-04-09 Valeo Equipements Electriques Moteur Bobinage électrique pour une machine électrique tournante
DE102019219683A1 (de) 2019-12-16 2021-06-17 Zf Friedrichshafen Ag Verfahren zur Herstellung eines Statorkerns in Haarnadelbauweise, Statorkern und elektrischer Motor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9017835U1 (de) 1990-10-04 1992-03-12 Robert Bosch Gmbh, 7000 Stuttgart Ständer für elektrische Maschinen
JP5560176B2 (ja) 2010-12-08 2014-07-23 トヨタ自動車株式会社 モータ及びモータ製造方法
FR3018964B1 (fr) 2014-03-24 2016-03-04 Valeo Equip Electr Moteur Element d'interconnexion pour le branchement des bobines du stator
DE102016200115A1 (de) 2016-01-08 2017-07-13 Zf Friedrichshafen Ag Stator einer elektrischen Maschine mit einer Verschaltungseinrichtung für Statorspulen und elektrische Maschine mit einem derartigen Stator
US10447108B2 (en) 2017-02-22 2019-10-15 Gm Global Technology Operations Llc. Distributed connection ring assembly for stator assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019126338A1 (de) * 2019-09-30 2021-04-01 Valeo Siemens Eautomotive Germany Gmbh Stator mit Pins für eine elektrische Maschine
WO2021065297A1 (fr) * 2019-09-30 2021-04-08 日本電産株式会社 Stator et moteur
FR3101736A1 (fr) * 2019-10-04 2021-04-09 Valeo Equipements Electriques Moteur Bobinage électrique pour une machine électrique tournante
DE102019219683A1 (de) 2019-12-16 2021-06-17 Zf Friedrichshafen Ag Verfahren zur Herstellung eines Statorkerns in Haarnadelbauweise, Statorkern und elektrischer Motor

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