WO2012175476A2 - Support de tête de bobine pour stator d'une machine électrique - Google Patents

Support de tête de bobine pour stator d'une machine électrique Download PDF

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Publication number
WO2012175476A2
WO2012175476A2 PCT/EP2012/061665 EP2012061665W WO2012175476A2 WO 2012175476 A2 WO2012175476 A2 WO 2012175476A2 EP 2012061665 W EP2012061665 W EP 2012061665W WO 2012175476 A2 WO2012175476 A2 WO 2012175476A2
Authority
WO
WIPO (PCT)
Prior art keywords
winding
wire
winding head
carrier
tooth
Prior art date
Application number
PCT/EP2012/061665
Other languages
German (de)
English (en)
Other versions
WO2012175476A3 (fr
Inventor
Markus KLÖPZIG
Harald Müller
Klaus Schleicher
Marco Schramm
Andreas SCHRÖTER
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2012175476A2 publication Critical patent/WO2012175476A2/fr
Publication of WO2012175476A3 publication Critical patent/WO2012175476A3/fr

Links

Classifications

    • 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
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • 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
    • H02K3/325—Windings characterised by the shape, form or construction of the insulation for windings on salient poles, such as claw-shaped poles

Definitions

  • Winding head support for a stator of an electric machine The invention relates to a winding head support for a stator of an electric machine, which is provided for a tooth coil winding.
  • Electric machines eg motors or generators with tooth coil windings are for example from the DE
  • Tooth coil windings also referred to as Einstattwicklungen, are preferably used in stators of synchronous machines with permanent magnet excitation, electrical excitation or a combination of both types of excitation, as well as in stators of synchronous and switched reluctance machines.
  • the tooth coil windings have a relatively small winding head and a reduced winding resistance compared to the distributed windings and can be made with a smaller axial length compared to distributed winding stators.
  • the stator lamination packages for tooth coil windings are designed in such a way that, seen in cross-section, teeth result around which the coils are wound. Hence the term stirs "tooth coil winding.”
  • the laminated core is this rectangular stator teeth available, the Biegera ⁇ serving the winding wire be very small at the corners of Statorrzähne. This therefore creates an unfavorable thermal see links.
  • the winding heads ie the areas of the tooth coil winding wind around ends of the stator teeth, underlaid by winding head carrier.
  • the object of the invention is to provide a winding head carrier for a stator of an electric machine with tooth coil windings, which ensures a good thermal contact of the tooth coil winding to the stator and reduces the risk of injury to the winding insulation.
  • the winding head ⁇ carrier specified above in that it consists of a ring area and from this radially inwardly extending teeth. In the plan view, this has a contour that essentially corresponds to the cross section of the laminated stator core. Furthermore, it is provided that the one end face of the winding head carrier is designed as a contact surface for the stator, so that the winding head carrier can be placed with the greatest possible contact on the end face of the stator lamination.
  • the tough ⁇ ne of the winding head support on the side opposite the contact surface side of the support surface for the winding head of the tooth-wound coils Wick ⁇ lung, with the supporting surfaces lung wire each having at least one radially inwardly extending guide structure for the Wick- the tooth coil winding are provided, consisting of guide elements exists, which are arranged at the distance of Wickelbrei ⁇ te w of the winding wire on the support surface.
  • the guide elements By the guide elements, the generation of the winding is advantageously simplified to the complemented by the winding head tooth of the stator lamination stack, the guide structure generated by the guide ⁇ elements can thereby the task take over, lead the winding wire on the support surface in parallel and / or preferably at edges of the support surface umzu ⁇ steer.
  • a winding carrier is provided on at ⁇ .
  • the guide elements allow a reliable winding of the winding with the winding wire, which can be reliably generated by the guide elements in parallel, abutting turns of the first winding layer on the stator tooth.
  • the use of a Wi ⁇ ckelkopf considerablys also reduces the risk that the winding wire is injured at the sharp corners of the stator tooth, because they are covered by the winding head carrier.
  • the area of the winding head ei ⁇ ne new document which can itself be made of an electrically isolating material such as plastic ⁇ thus created by the winding support. Of course, this must be able to cope with the prevailing operating temperatures of the electrical machine.
  • the teeth of the winding head ⁇ head carrier can also make ⁇ rounded on the side of the support surface, so that here larger winding radii can be realized, as on the bare stator lamination.
  • the guide elements consist of notches in a ra ⁇ dial inwardly running edge in the support surface. Radially inward in the context of the invention means that the edge along the longitudinal extent of
  • Tooth runs which is indeed mounted on the radial inner surface of the ring area pointing radially inward. In other words, that means the edge below all this crossing turns of the first winding layer runs.
  • this edge notches as guide elements, so when winding the winding wires are drawn into the notches, provide this same time that the winding radius on the said edge magnification ⁇ is ßert of time, and thus the already mentioned improvement is achieved Wick ⁇ lung intrinsically sheep ,
  • the guide elements consist of attachments which protrude from the support surface. This means that the Füh ⁇ guide elements throughout the support surface of the tooth can be ⁇ introduced, wherein the queries against the effect that the guide elements press into the spaces between the turns of the first winding layer and thus uniquely position it in the radial direction of the winding carrier.
  • the guide elements are designed as notches, they may be in the form of grooves, V-grooves and other geometric shapes. If the guide elements designed as In ⁇ rates, they can ⁇ example, consist of the Pyrami with a square base, V-shaped projections with the appearance of gable roofs of a house or U-shaped notches in a ridge. Alternatively, the structure at the edge of the winding carrier can also exclu ⁇ Lich fulfill the function of the wire redirection defined. If this is the case, it is spoken by a deflection structure.
  • a further advantageous embodiment of the Wickelkopfträ ⁇ gers is obtained when adjacent to the tooth roots of the teeth in the inner side of the annular region in each case an axially ver ⁇ running wire inlet groove is provided, which in winding direction Direction seen from the contact surface facing away from the end face of the ring area leads in the direction of contact surface.
  • This Drah thus has teinlaufnut ⁇ a tunnel-like opening in the side opposite the contact surface end face of the ring portion. Through this tunnel-like opening of the wire inlet may extend into the perception ⁇ re winding where it merges into de first turn of the first winding. In this case, the course of the first turn of the first winding layer is not disturbed by the outside of the tooth winding inlet in the form of a groove.
  • each one is provided from the inside of the annular area upscale guide wedge for the end of the first turn of the tooth coil winding, seen in the winding direction starts at the beginning of the support surface with a height of 0 and on End of the support surface has a height h corresponding to the winding width w of the winding wire.
  • the guide wedge has the function to lead the end of the ers ⁇ th screw reliably on the second guide element of the tooth, so that the second turn of the first location on the first, already wound winding along can be guided. The further turns are each guided by the previous turn.
  • the guide wedge advantageously produces a reliable support for the last turn of the second winding layer, so that a reliable heat transfer is ensured here as well.
  • the guide wedges have a width b corresponding to the winding height of the winding wire exhibit.
  • the winding height of the winding wire does not necessarily have to be equal to the Wi ⁇ ckelbreite of the winding wire. It is at
  • a standardized winding head carrier which can be equipped depending on the winding wire to be used with different guide wedges and guide structures, which are optimally adapted to the winding wire used.
  • a modular system for the winding head carrier can be produced, with the guide wedges and guide structures having comparatively small dimensions, so that the expenditure for tool construction (for example, cast tools) is comparatively low.
  • These structures can also be produced, for example, using additive manufacturing methods, since this is comparatively inexpensive for components with a low volume.
  • the winding head carrier itself represents a comparatively large component, for which only one mold must be provided.
  • the winding head carrier regardless of the guide wedges and guide structures used, must be adapted specifically to a specific geometry of the laminated stator core.
  • a further advantage of guide wedges embodied as separate components is that, when the winding head carrier is used, it is necessary on only one of the end faces on both end faces of the stator lamination stack, namely on that end face which has the end of the first turn of the first winding ply. On the other side of the guide wedge ⁇ would even prevent a trouble-free winding of the winding wire ⁇ development on the contrary.
  • the guide wedge In the case of winding end carriers which have firmly formed guide wedges, the guide wedge must be removed on one side if identical parts are to be used for both end faces of the stator lamination stack. This can be done for example by milling.
  • the storage grooves have the purpose that after completion of the winding winding the end of the winding wire can be reliably held in the winding head carrier.
  • the storage groove is provided with undersize with respect to the cross section of the winding wire, so that it must be pressed into the storage groove and remains fixed in this.
  • the interference fit should be such that the winding wire can be released from the storage groove by hand again as soon as the winding wire is used to wire the tooth coil winding.
  • the storage groove can be of universal utility to ensure the winding head carrier to be subsequently inserted after a casting production of the winding head carrier, for example by milling. This results in only a small overhead for the production, since the groove is easy to manufacture in terms of their geometry and their course.
  • a groove may be provided which has a slightly wedge-shaped course, so that the winding wire is clamped by being guided into the groove. Such a groove can also be produced by casting simultaneously with the production of the winding head carrier.
  • a special embodiment of the winding head carrier will he hold ⁇ if in the middle between adjacent teeth in the inner side of the annular region axially extending Formwindnuten are provided which provide a passage space for a used in an automatic winding method (eg. These stylus grooves facilitate the preparation of the tooth coil winding when it is wound directly on the tooth. It should be noted that in the case of automated winding of the tooth coil winding by means of a molding pin, the last turns of the tooth coil winding must be made under very tight conditions, since the two adjacent tooth coil windings are then already quite close. By Formitnut formed in this time ⁇ point of the winding process, an additional space that does not have to be filled by winding wire and thus facilitates the implementation of ⁇ the stylus.
  • the winding headband ⁇ head is composed of several circle segments. Especially with larger electrical machines, this has the advantage that the winding head easier transported and manufactured can be.
  • the circle segments are brought together at suitable mating surfaces, with additional centering and positioning ⁇ onier Anlagenn can be provided.
  • in the annular grooves Verschaltungsringe are provided which are electrically lei ⁇ tend connected to the respective wiring. With the help of a reliable, space-saving and geometrically simple interconnection of the winding wires is possible borrowed advantageous.
  • the Verschaltungsring may preferably be made of copper or aluminum, but also of any other electrically conductive material.
  • FIG 1 schematically from the side of an embodiment of a laminated stator core, on the end faces of embodiments of the invention winding headband ⁇ are used and also a
  • Figure 2 shows in perspective an embodiment of a Seg ⁇ mentes an embodiment of the erfindungsge ⁇ MAESSEN winding head carrier
  • Figure 3 shows another embodiment of the invention shown SEN winding head carrier as a top view (detail), the latter having a view similar to Figure 2 Geomet ⁇ rie
  • Figure 4 a perspective view of an alternative Design of the
  • Teeth of another embodiment of the inventions ⁇ inventive winding head carrier, but otherwise analogous to Figure 2 is constructed and Figure 5 is a perspective view of an amongsbei ⁇ game of the winding head carrier according to the invention, which is connected to a circuit carrier.
  • a stator 11 for a synchronous machine.
  • This consists of a laminated stator core 12, which has a winding head carrier 14 at each end face 13.
  • the winding head carriers each have a ring region 15, from the inside of which teeth 16 protrude radially inward, which each receive the winding head 17 of tooth coil windings.
  • the coil terminals (ie, the ends of the Wick ⁇ ment wires) of the tooth coil winding are guided by an attached to the outer end of a winding support 14 circuit board 19, which provides annular grooves 20 for receiving and guiding the wiring 18, and thus form a wiring 18th
  • the exact structure of the winding carrier 14 may be 2 ⁇ ent accepted.
  • the opposite end face 23 can serve as a mounting surface ⁇ for the circuit substrate 19.
  • the annular region has an outer side 24 and an inner side 25, wherein the teeth 16 protrude radially inwards from the inner side 25.
  • a Drahteinlaufnut 26 In the end face 23 also can be seen an opening formed by a Drahteinlaufnut 26, wherein the Drahtein ⁇ running groove runs on the inside 25 26th Furthermore, a storage groove 27 can be seen, the radially-obliquely outward directed in the end face 23 extends. Exactly in the division ⁇ plane 28 of the segments extends a Formwindnut 29, which is introduced into the inner side 25, wherein each half of this Formlixnut are each formed by the adjacent, abutting in the dividing plane segments of the winding head.
  • a round hole 30 is provided with an internal thread in the end face 23, in which a screw for fastening the circuit substrate 19 via kor ⁇ responding round holes 31 in the circuit carrier (see Figure 5) can be screwed.
  • the tooth 16 extends from a tooth root 32 on the inside of the annular region 15 radially inwards to a tooth head 33, on which a pole piece 34 is provided as a boundary. Between the inside 25 and the pole piece 34, a support surface 35 extends for the tooth coil winding.
  • a support surface 35 extends for the tooth coil winding.
  • edges (shown in phantom) 36 in the support surface notches 37 are provided as guide elements, which in their entirety over the entire length of To extend tooth radially and thus give a guide ⁇ structure 38 for the winding wire.
  • the winding ⁇ wire 39 comes to lie in the notches in the manner indicated, so the bending radius of the winding wire 39 can be increased in the region of the edges 36.
  • FIG. 3 shows how the winding wire 39 can be wound around the tooth 16.
  • the winding head carrier is shown with a geometry according to FIG. 2, but as a one-piece variant without segments. Therefore, the centering pins missing 21. It can be seen at the tooth root 32 further ⁇ towards a guide key 40 relative to the inner side 25 as seen in the winding direction 41 of the winding wire 39, the height of 0 and at the end of the support surface having the height h on top of the support surface 25th The height h corresponds exactly to the winding width b of the winding wire. This is equipped in the embodiment with a round cross section, which is why its Wick ⁇ ment height of the winding width b corresponds.
  • the wire ⁇ inlet 42 is located in the wire inlet groove. Furthermore, the first end of the first turn 43 a can be seen, which conforms to the guide wedge 40. The further turns 43b then nestle against the adjacent turn.
  • the first winding 43d of the two ⁇ th winding layer is also shown in phantom, which is not disrupted as illustrated by the Drahtein ⁇ running 42nd
  • the alternative embodiment of one of the teeth 16 of the winding head carrier 14 is shown. It is only the tooth tip 33 shown, the ring portion 15 is formed entspre ⁇ accordingly FIG. 2
  • the tooth 16 differs from the tooth according to FIG. 2 in that as guide elements Towers 44 are used, which have the shape comparable to pitched roofs of a house. These lie directly against one another, so that guide grooves for the winding wire result, which is not shown in Figure 4.
  • the towers 44 according to Figure 4 are executed as part of the guide ⁇ structure 38 which is a separate component ⁇ leads.
  • the guide structure can be glued into a receiving groove 45, which is introduced into the support surface 35 of the tooth. Furthermore, it can be seen that the support surface 35 has a slightly rounded contour, whereby advantageously particularly large radii for the winding head can be realized.
  • a winding head carrier 14 is shown, which is connected via spacers 46 to a circuit carrier 19. Via the spacers 46, a space is also created between the end faces of the winding head carrier 14 and the circuit carrier 19, within which the cabling can be guided from the winding heads located on the winding head carrier to through holes 47 in the groove bottom of the grooves 20a, 20.
  • the winding wires are inserted through these through holes 47 and pass in this way in the grooves.
  • the grooves themselves are used for reliable and mutually insulated guidance of the winding wires, which can be combined to form a wiring, or a bus bar for the winding wires (not shown in detail in Figure 5).
  • the voluminous annular groove 20a is available for each one of the tooth coil winding wire winding per tooth coil winding, so that their summary is done to a star point.
  • the wire inlets 42 are summarized to the star point, wherein the through holes in the widened annular groove 20 preferably are arranged exactly in the pattern of the wire inlet grooves in order to realize the shortest possible wiring paths between the respective through holes 47 and the wire inlet grooves in the space between the winding head carrier 14 and the circuit substrate 19.
  • Alternatively may be at the position of
  • the other three annular grooves are used for wiring of three phases, so that the synchronous machine, not shown, in the circuit carrier according to Figure 5 can be equipped with the usual three-phase control.
  • the outer three annular grooves 20 for the respective phases in a circular segment are impressedbro ⁇ chen, so that the groove walls are missing.
  • bolts 49 are provided, which can be inserted through lateral openings in the groove walls and thus contribute to a locking of the winding wires located in the grooves.
  • the circuit carrier is made of an electrically insulating material, preferably plastic.
  • the Verschaltungsringe can be designed as massive rings or as Lit ⁇ zeleiter.
  • the rings need not be closed ⁇ sen, they may have an open position, which facilitates assembly.
  • a massively implemented circuit ring detachable Kon ⁇ tact elements eg connectors

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

Abstract

L'invention concerne un support de tête de bobine (14) pour un stator d'une machine électrique conçu pour un bobinage dentaire. Selon l'invention, ce support de tête de bobine est lui aussi doté de dents (16), qui sont pourvues d'encoches (37) ou de structures qui permettent un guidage sûr du fil du bobinage (39). Des cales de guidage (40), des rainures d'entrée de fil (26), des rainures de sortie de fils (27) et des encoches pour tige de formage (29) qui facilitent la réalisation et le guidage du fil de bobinage (39), de manière à autoriser de manière avantageuse une mise en place fiable du fil d'enroulement sur le support de tête de bobine et la paquet de tôles statoriques (non représenté). Un transfert thermique fiable est ainsi assuré. De plus, les éléments de guidage en forme d'encoches (37) permettent l'obtention de rayons de courbure plus importants du bobinage dentaire dans la région des têtes de bobines entourant le support de tête de bobine du bobinage dentaire, ce qui réduit le risque d'endommagement de l'isolation du fil du bobinage.
PCT/EP2012/061665 2011-06-23 2012-06-19 Support de tête de bobine pour stator d'une machine électrique WO2012175476A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110078025 DE102011078025A1 (de) 2011-06-23 2011-06-23 Wickelkopfträger für einen Stator einer elektrischen Maschine
DE102011078025.4 2011-06-23

Publications (2)

Publication Number Publication Date
WO2012175476A2 true WO2012175476A2 (fr) 2012-12-27
WO2012175476A3 WO2012175476A3 (fr) 2013-08-01

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Family Applications (1)

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PCT/EP2012/061665 WO2012175476A2 (fr) 2011-06-23 2012-06-19 Support de tête de bobine pour stator d'une machine électrique

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DE (1) DE102011078025A1 (fr)
WO (1) WO2012175476A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10193427B2 (en) 2015-12-01 2019-01-29 General Electric Company Method of fabricating electric machine laminations using additive manufacturing
US11527944B2 (en) 2015-12-07 2022-12-13 General Electric Company Additive manufacturing for segmented electric machines

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Publication number Priority date Publication date Assignee Title
DE102014209006A1 (de) * 2014-05-13 2015-11-19 Wobben Properties Gmbh Synchrongenerator einer getriebelosen Windenergieanlage
JP6742707B2 (ja) * 2015-09-28 2020-08-19 東芝ライフスタイル株式会社 ステータおよび電動機
DE102018210551A1 (de) 2018-02-13 2019-08-14 Siemens Aktiengesellschaft Elektrische Maschine mit einer Mehrzahl von Verschlusseinrichtungen zum Verschließen von jeweiligen Zwischenräumen zu einem Luftspalt sowie Herstellungsverfahren

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10193427B2 (en) 2015-12-01 2019-01-29 General Electric Company Method of fabricating electric machine laminations using additive manufacturing
US11527944B2 (en) 2015-12-07 2022-12-13 General Electric Company Additive manufacturing for segmented electric machines

Also Published As

Publication number Publication date
DE102011078025A1 (de) 2012-12-27
WO2012175476A3 (fr) 2013-08-01

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