WO2019210901A1 - Machine électrique avec bague de stator composée de segments de couronne dentée reliés par le biais de segments de façonnage plastique et procédé de fabrication pour un stator - Google Patents

Machine électrique avec bague de stator composée de segments de couronne dentée reliés par le biais de segments de façonnage plastique et procédé de fabrication pour un stator Download PDF

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Publication number
WO2019210901A1
WO2019210901A1 PCT/DE2019/100304 DE2019100304W WO2019210901A1 WO 2019210901 A1 WO2019210901 A1 WO 2019210901A1 DE 2019100304 W DE2019100304 W DE 2019100304W WO 2019210901 A1 WO2019210901 A1 WO 2019210901A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
sprocket
ring
electric machine
machine according
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.)
Ceased
Application number
PCT/DE2019/100304
Other languages
German (de)
English (en)
Inventor
Carsten Angrick
Matthias Gramann
Fabian Oehler
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of WO2019210901A1 publication Critical patent/WO2019210901A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H02K1/16—Stator cores with slots for windings
    • 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
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/021—Magnetic cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/021—Magnetic cores
    • H02K15/026—Wound cores

Definitions

  • the present invention relates to an electric machine, such as an electric motor or a generator, for example, having a rotor as an inner or outer rotor, with a stator that a stator for receiving one or more windings, such as in the manner of a winding mat / winding mat prepared is, wherein the stator ring having a sprocket with sprocket portions / sprocket segments, which are divided in the circumferential direction by outwardly open grooves. Furthermore, the present invention relates to a method for producing a stator, in particular for an electric machine.
  • a wave winding as a winding technology offers advantages in the development of high-performance electric motors in terms of maximum performance compared to a concentrated winding and advantages in terms of number of welds and skin and proximity effects compared to a hairpin design, ie implementing a Hairpin technology.
  • a skin effect is to be understood as an increase in resistance of current-carrying conductors at high frequencies, the skin effect being based on the fact that at high frequencies the current density in a conductor is no longer constant, since the current is displaced towards the surface of the conductor.
  • the proximity effect refers to the increase of the ohmic resistance for alternating current of a winding relative to the single winding, which occurs between closely spaced conductors through which alternating current flows.
  • the Hairpin technology is a method in which the individual segments look like hairpins and are inserted individually into the nut, whereby a higher copper filling factor and thus a higher energy efficiency can be achieved, which in turn leads to a lower material consumption.
  • DE 1 488 682 A discloses a method for producing a laminated stator core for electric machines, which consists of an inner ring gear provided with outwardly open grooves and an outer magnetic yoke ring applied to the open slots, wherein the tooth - Wreath and yoke ring are formed by helical Hochkantwickeln ever a metal strip.
  • stator is radially separated on the example of an internal rotor, so that the bar shaft winding is introduced radially from the outside.
  • the inner part of the stator must be stable, for example guided on a rotatable mandrel.
  • sprocket sections hereinafter also referred to as “single teeth” may be fastened in this mandrel in a suitable manner. If this succeeds, these individual teeth can be punched out of the sheet metal roll with very little unusable proportion of material.
  • a disadvantage of the current wave winding design is, for example, the introduction of winding mats radially from the inside into a stator full cut and fixing with slot lock wedges.
  • type-specific tools and devices enable ideal radial insertion, so that damage to the wire during assembly can be avoided.
  • these tools need to be rebuilt for each type and thus have severe limitations especially in time-critical pattern building.
  • the slot opening of the stator full section for this process corresponds at least to the wire width.
  • the object of the invention is achieved according to the invention in a generic device in that the separate sprocket sections are connected to each other via a respective plastic deformation section.
  • the inner part of the stator has one or more connection locations, which then, as a part, hold together the individual sprocket portions after the deformation portion, also as in the outer part, overlapping, such as a wall.
  • connection of the teeth of the inner part of the stator can be achieved in a targeted manner by means of a form-fitting press connection.
  • the plastic deformation section is present on the radial inner side of the toothed rim and / or provides the base of the groove.
  • a stable and closed inner ring is formed, which enables further processing, wherein the ring connects the individual sprocket sections with one another and at the same time forms the end of a slot opening, that is to say the groove bottom.
  • such an arrangement allows to make openings of the punched-out grooves radially outwards.
  • the closed grooves further reduce Torqueripple and power losses.
  • a continuous electrical sheet is created in the circumferential direction.
  • the use of such an electric sheet makes it possible to form the inner part of the stator ring in a stable and closed manner.
  • a sheet can be formed from one or more layers / layers.
  • a type-specific adjustment can be easily made.
  • a cohesive connection realizes that the electrical sheet is "continuously" formed.
  • a magnetic short circuit can start at a certain level Thin of the electrical sheet can be avoided, since this is at this particular thinness in saturation, and thus the electrical sheet has a behavior according to an air layer.
  • a number of the grooves correspond to a number of radially inwardly projecting compression protrusions.
  • resulting from the additional radial pressing a better Nutyoglltex and thus a higher performance.
  • no slot wedges are necessary because the fixation of the wire is ensured.
  • the outwardly open groove has an insertion phase in a region of its opening.
  • the insertion phase of each groove serves, on the one hand, to guide the windings / wires to be introduced into the slot openings, and on the other hand, it provides protection for these windings and / or wires.
  • the compression projections are adapted to the shape of the Ein 1500pha- sen.
  • these compression projections can exert an optimal pressing force on the windings / wires arranged in the groove, whereby they are compacted radially and thus improved thermal contact is achieved between the sprocket sections and the windings / wires.
  • the groove fill factor can be increased.
  • the grooves are defined by tooth flanks of a respective sprocket section, with the tooth flanks of a groove running radially inwards at an angle to one another. This means that the tooth flanks in the groove have a conical course through which the windings / wires introduced into the grooves are in turn radially compressed.
  • stator ring is supplemented with one or more winding mats in the grooves to the stator.
  • winding mats can be produced in a separate manufacturing process, and finally introduced into a respective groove, whereby the manufacturing of the stator ring is significantly simplified.
  • the invention relates to a method for producing a stator, in particular for an electric machine according to one of the preceding aspects.
  • the outer part of the stator is constructed as a separate component of single sheet metal like a wall, that is, over the first layer of sheet metal or laminated core (several sheets packaged), the next layer (single sheet or laminated core) bridges the gap and thus the tooth - wreath sections connects, "piled up" / added. This can be done by punching cams or gluing or welding.
  • the individual sprocket sections are punched from a Blechroh- ling and then joined together in segments.
  • Such a connection is obtained by crimping / crimping the individual sprocket sections together. reached each other.
  • the segment which may consist of several sprocket sections, twisted and punched again.
  • the segment is not rotated by an entire segment in order to achieve an offset arrangement of the resulting electrical sheets during the crimping, for example in accordance with the construction of the wall by half a segment. This process is repeated until a type-specific thickness is reached.
  • An offset twisting also provides more stability. Since material from the sprocket section is used during crimping, no additional material is to be used.
  • the outer part of the stator, the inner part of the stator, and the rotor as an annular assembly are created by the types of connection described.
  • the stator is connected by overlapping the sheet metal or laminated core. In the case of the rotor, a positive connection is used.
  • Another option is to build the rotor through individual segments that are packaged to assemble the entire rotor.
  • the overall fabrication i.e., manufacturing combination
  • the twisting is already used, for example, in order to be able to process sheets in the stack, which are created from edge zones of the sheet metal roll.
  • the edge zones can in part have different sheet thicknesses. Due to the fact that different sheet thicknesses can be used, a "slanted tower" can result when "not twisting”. By twisting this effect is compensated.
  • the fit is used as in a puzzle that connects individual teeth or areas with others.
  • the number of process steps can be reduced. Consequently the overall manufacturing / manufacturing combination may include the following steps:
  • the order can be exchanged as long as the pivot point is arranged in such a way that minimal waste is generated in the layout of the sheet. Furthermore, it is not necessary to continue to rotate after each punching stroke, but sheet packs can be produced as described above before further rotation is performed.
  • the sprocket portions should be held. This is effected, for example, by magnetic means, or by gluing a film which is peeled off or by using a vacuum. There are various variants possible, the sheet feed and the position of the pivot points should be synchronized with each other.
  • the windings are inserted into grooves between the sprocket portions.
  • the winding production step is a separate step from the manufacturing steps of the stator, so that the process can be optimized with regard to time-critical tool production in prototyping and the number of process steps. Namely, the winding mat can be introduced directly from the winding device in the outwardly open sprocket.
  • FIG. 1 is an exploded view of a portion of a stator ring and a rotor
  • FIG. 2 is an enlarged view of the detail II of FIG. 1 in the region of an electric blank between two sprocket sections;
  • FIG. 1 is an exploded view of a portion of a stator ring and a rotor
  • FIG. 2 is an enlarged view of the detail II of FIG. 1 in the region of an electric blank between two sprocket sections
  • FIG. 3 is a graphical representation of a section of a stator ring and a rotor
  • Fig. 4 shows a method for Fierstellen the connection points between individual segments
  • Fig. 5 four steps of the manufacturing process of the stator.
  • stator 1 shows an exploded view of a stator 1 with a stator ring 2 for receiving one or more windings 3 (see FIG. 5).
  • the stator ring 2 has a ring gear 4 with sprocket portions 5, which are in the circumferential direction 6 by bottom radially open grooves 7 below.
  • the sprocket 4 shows separate sprocket portions 5, which are shown independently of each other.
  • the ring gear 4 forms, together with the yoke ring 8, the stator ring 2.
  • the yoke ring 2 has compression projections 9, which are formed in a shape of the ring gear 4 which corresponds to the grooves 7 in order to receive them.
  • Radially inside the stator ring 2 is the rotor 10, which rotates in the stator 1.
  • a section of the stator ring 2 and of the rotor 10 is shown in FIG. 1.
  • FIG. 2 is an enlarged view of the section marked as detail II in FIG. 1 and shows an electrical sheet 11 between two sprocket sections 5.
  • This electric sheet 11 thus provides the plastic connecting sections and connects the respective individual sprocket sections 5 by crimping.
  • the plastic connecting portions contained in the electrical sheet 11 are provided with the reference numeral 17.
  • a continuous, closed ring is formed radially within the stator ring 2, in order to provide stability and enable further processing.
  • the electrical sheets 11 may have different numbers of layers and thus thicknesses.
  • FIG. 3 is an illustration of a section of a stator ring 2 and a rotor 10.
  • the rotor 10 is arranged radially inside the stator ring 2.
  • Radially outside of the rotor 10, the ring gear 4 is shown, which surrounds the rotor 10.
  • At the radially outermost point of the stator 1 is the yoke ring 8, the compression projections 9 of which abut against the slot openings 7 in a form-fitting manner.
  • Fig. 4 shows a method for Fierstellen the junctions of individual segments.
  • the yoke rim 8, the ring gear 4 and the rotor 10 are shown in Fig. 4 in several different segments, which are arranged in the circumferential direction 6 and form a ring.
  • the segments are each the same size.
  • On the left in FIG. 4, the area 12 that is still to be punched out is shown.
  • Already punched out regions 13 are shown in a particularly pronounced segmental manner both for the yoke rim 8 and the toothed rim 4 and the rotor 10.
  • the entire ring is rotated in the direction of the arrow 14 and finally an additional layer of an electrical sheet 11 (see FIGS. 2 and 5) is punched into the grooves 7.
  • FIG. 4 it can be seen that the twist can also be less than an entire segment.
  • Fig. 5 shows the steps of the manufacturing process of the stator 1 again.
  • the stator ring 4 is shown.
  • This illustration shows the sprocket sections 5, as well as the respectively intermediate grooves 7.
  • the electrical sheets 11 are shown with the plastic connecting sections provided by them, which has a form inner closed ring and keep the individual sprocket sections 5 together.
  • each groove 7 of the adjacent ring gear portion 5 is more bevelled. These chamfers form the insertion phases 15, which are intended both for guiding and for protecting the wire.
  • the second illustration of FIG. 5 from the left represents a subsequent manufacturing process step.
  • Winding mats 16, which contain the individual windings 3, are inserted / inserted in the grooves 7 provided for this purpose.
  • the winding mats 16 are manufactured in a separate fierwolfsvon, which is performed in parallel to the other manufacturing process steps, and thus can be used directly without a further time-consuming intermediate production process step.
  • the prefabricated winding mats 16 can be inserted into the grooves 7 without damage.
  • the winding mats 16 are compressed by the conical shape of the groove 7.
  • the third image from the left of FIG. 5 shows, in a final manufacturing process step, the placement of the yoke rim 8 on the ring gear 4, wherein the compression projections 9 are inserted precisely into the insertion phases 15 of the ring gear 4 and the winding mats 16 are further compressed by being pressed on.
  • the fourth illustration from the left of FIG. 5 illustrates the finished stator 1, which consists of the ring gear 4 with the sprocket portions 5, the winding mats 16 and the yoke rim 8 used.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

La présente invention concerne une machine électrique équipée d'un stator (1) qui comprend une bague de stator (2) préparée pour recevoir un ou plusieurs enroulements (3), la bague de stator (2) comprenant une couronne dentée (4) ayant des segments de couronne dentée (5) qui sont divisés dans la direction circonférentielle (6) par des gorges (7) ouvertes vers l'extérieur, et les segments de couronne dentée séparés les uns des autres (5) sont reliés entre eux par le biais d'un segment de façonnage plastique respectif. La présente invention concerne en outre un procédé de fabrication d'un stator (1), au cours d'une sous-étape de fabrication duquel des segments de couronne dentée (5) séparés les uns des autres sont obtenus par poinçonnement sans enlèvement d'une tôle brute et, ensuite, les segments de couronne dentée (5) sont reliés entre eux par le biais d'une ou de plusieurs étapes de façonnage plastique.
PCT/DE2019/100304 2018-05-03 2019-04-03 Machine électrique avec bague de stator composée de segments de couronne dentée reliés par le biais de segments de façonnage plastique et procédé de fabrication pour un stator Ceased WO2019210901A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018110615.7A DE102018110615A1 (de) 2018-05-03 2018-05-03 Elektromaschine mit aus über plastische Verformungsabschnitte verbundenen Zahnkranzabschnitten aufgebautem Statorring und Herstellverfahren für einen Stator
DE102018110615.7 2018-05-03

Publications (1)

Publication Number Publication Date
WO2019210901A1 true WO2019210901A1 (fr) 2019-11-07

Family

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Application Number Title Priority Date Filing Date
PCT/DE2019/100304 Ceased WO2019210901A1 (fr) 2018-05-03 2019-04-03 Machine électrique avec bague de stator composée de segments de couronne dentée reliés par le biais de segments de façonnage plastique et procédé de fabrication pour un stator

Country Status (2)

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DE (1) DE102018110615A1 (fr)
WO (1) WO2019210901A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021122130A1 (de) 2021-08-26 2023-03-02 Schaeffler Technologies AG & Co. KG Stator einer elektrischen Rotationsmaschine, Verfahren zur Herstellung des Stators sowie elektrische Rotationsmaschine
DE102021122128A1 (de) 2021-08-26 2023-03-02 Schaeffler Technologies AG & Co. KG Stator einer elektrischen Rotationsmaschine, Verfahren zur Herstellung des Stators sowie elektrische Rotationsmaschine
DE102021122126A1 (de) 2021-08-26 2023-03-02 Schaeffler Technologies AG & Co. KG Stator einer elektrischen Rotationsmaschine, Verfahren zur Herstellung des Stators sowie elektrische Rotationsmaschine
DE102022129444A1 (de) * 2022-11-08 2024-05-08 Schaeffler Technologies AG & Co. KG Verfahren zur Montage eines Stators mit einer Wellenwicklung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1488682A1 (de) 1965-07-03 1969-07-03 Siemens Ag Lamelliertes Staenderblechpaket fuer elektrische Maschinen
US3827141A (en) * 1972-05-17 1974-08-06 Skf Ind Trading & Dev Method of manufacturing an electric rotary machine
DE19951179A1 (de) * 1999-10-23 2001-04-26 Abb Research Ltd Rotierende elektrische Maschine
US20110101816A1 (en) * 2009-10-30 2011-05-05 Denso Corporation Stator for a rotating electric machine and rotating electric machine
US20120007463A1 (en) * 2010-07-06 2012-01-12 Denso Corporation Stator for electric rotating machine
EP3026791A1 (fr) * 2013-07-24 2016-06-01 Mitsubishi Electric Corporation Noyau de stator, stator, procédé de fabrication de stator, machine électrique tournante et dispositif de direction assistée électrique
JP2017070015A (ja) * 2015-09-28 2017-04-06 アイシン・エィ・ダブリュ株式会社 ステータおよびステータの製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1488682A1 (de) 1965-07-03 1969-07-03 Siemens Ag Lamelliertes Staenderblechpaket fuer elektrische Maschinen
US3827141A (en) * 1972-05-17 1974-08-06 Skf Ind Trading & Dev Method of manufacturing an electric rotary machine
DE19951179A1 (de) * 1999-10-23 2001-04-26 Abb Research Ltd Rotierende elektrische Maschine
US20110101816A1 (en) * 2009-10-30 2011-05-05 Denso Corporation Stator for a rotating electric machine and rotating electric machine
US20120007463A1 (en) * 2010-07-06 2012-01-12 Denso Corporation Stator for electric rotating machine
EP3026791A1 (fr) * 2013-07-24 2016-06-01 Mitsubishi Electric Corporation Noyau de stator, stator, procédé de fabrication de stator, machine électrique tournante et dispositif de direction assistée électrique
JP2017070015A (ja) * 2015-09-28 2017-04-06 アイシン・エィ・ダブリュ株式会社 ステータおよびステータの製造方法

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