WO2012089404A2 - Dent d'enroulement pour une machine électrique, composants de machine et machine électrique - Google Patents

Dent d'enroulement pour une machine électrique, composants de machine et machine électrique Download PDF

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Publication number
WO2012089404A2
WO2012089404A2 PCT/EP2011/070354 EP2011070354W WO2012089404A2 WO 2012089404 A2 WO2012089404 A2 WO 2012089404A2 EP 2011070354 W EP2011070354 W EP 2011070354W WO 2012089404 A2 WO2012089404 A2 WO 2012089404A2
Authority
WO
WIPO (PCT)
Prior art keywords
tooth
stator
winding
geometry
toothed shaft
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/EP2011/070354
Other languages
German (de)
English (en)
Other versions
WO2012089404A3 (fr
Inventor
Torsten Wilharm
Tilo Koenig
Maxim Sukhman
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2012089404A2 publication Critical patent/WO2012089404A2/fr
Publication of WO2012089404A3 publication Critical patent/WO2012089404A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles

Definitions

  • the present invention relates generally to electrical machines, particularly electrical machines having machine components constructed by stacking laminations. Furthermore, the present invention relates to the improvement of the Wrkungsgrades and the improvement of the thermal contact resistance and reduction of the installation space in electrical machines.
  • Machine components such as stators or rotor of electrical machines, are often built in lamellar construction of lamella plates.
  • the lamellar plates are usually similarly punched and stacked on top of each other, so that these - in rotary electric machines in the axial direction, otherwise generally in a direction perpendicular to a relative direction of movement between the stator and rotor - lie on each other.
  • the laminations are typically insulated from each other to reduce the flow of wrinkles in the machine component.
  • an inverting tooth for an electric machine having a tooth shaft and a tooth tip disposed at one end of the tooth shaft with respect to an extension direction of the tooth shaft and projecting beyond the tooth shaft in a tooth head direction perpendicular to the extension direction.
  • the tooth tip is tapered at at least one end with respect to a transverse direction that is perpendicular to the extension direction and perpendicular to the tooth tip direction in which the tooth tip protrudes.
  • An idea of the above invention is to reduce the width of the tooth tips with respect to the direction of extension direction of the tooth shaft toward an end of the tooth for toothing with respect to the transverse direction.
  • the tooth cross-section in the area of the toothed shaft is virtually rounded and thus the circumference reduced, which results in winding in a reduced wire length and thus in lower ohmic losses, increased efficiency and lower material costs.
  • the grading of the tooth heads makes better use of the available space and improves the thermal contact resistance.
  • the toothed shaft may be tapered at at least one end, with respect to a transverse direction that is perpendicular to the extension direction and perpendicular to the tooth tip direction.
  • the first lamination with the first geometry provides a width of the toothed shaft transversely to the extension direction, which is greater in the tooth-head direction than the corresponding width of the toothed shaft in the second geometry.
  • a machine component in particular a stator or rotor of an electrical machine, is provided with one or more of the above winding teeth.
  • the machine component may be composed of a plurality of similar segments each having one or more winding teeth.
  • a machine component in particular a stator or rotor of an electrical machine, is provided with one or more of the above teeth, wherein at least one of the winding teeth is provided with an insulating part which is shaped to be one or both of the tapered ones Ends of the tooth shaft covered.
  • the optimized design of the insulating parts which can be placed on the tapered end of the toothed shaft, allows reliable protection of the winding wire with a small cross-sectional area.
  • the insulating part may be formed as a separate component or by encapsulation of the winding teeth with an insulating material.
  • an engine component for an electric machine having a tooth for toothing with a toothed shaft and a stator portion, the toothed shaft being disposed at one end with respect to its extending direction at the stator portion, the stator portion being in a stator direction perpendicular to the extending direction of the tooth - Stem projects, wherein the stator section is tapered at at least one end with respect to a transverse direction which is perpendicular to the extension direction and perpendicular to the stator direction, tapered.
  • the winding tooth may have a tooth tip, which is arranged at a further end of the tooth shaft with respect to an extension direction of the tooth shaft and which protrudes in a tooth head direction corresponding to the stator direction, perpendicular to the extension direction over the tooth shaft, wherein the tooth tip at least an end is tapered with respect to the transverse direction.
  • the toothed shaft may be tapered at at least one end with respect to the transverse direction.
  • the winding tooth has a stack of laminations, which are stacked in the transverse direction, wherein a first laminations are provided with a first geometry and a second laminations with a second geometry, wherein the first laminations with the first geometry has a width of Tooth sprocket transversely to its extension direction provides, which is greater than the corresponding width of the toothed shaft in the second geometry with respect to the tooth head direction in which the tooth head protrudes beyond the toothed shaft.
  • winding teeth are wound with sprocket wire to form a wadlung.
  • an electric machine with the above machine component is provided.
  • FIGS. 1a-1c show various laminations for constructing a stator of an internal rotor motor in one-part or multi-part design
  • FIG. 2 is a perspective view of the sheet metal section or
  • Figure 3 is a sectional view of a stator tooth of the stator according to an embodiment of the present invention.
  • Figure 4 shows a cross section through a wound toothed shaft
  • FIGS. 1 a to 1 c show different geometries of laminations for laminations for constructing a stator for an electrical machine.
  • the stator is built up by stacking the lamella plates.
  • the stator of the electric machine to be produced should have stator teeth to be wound with winding wire to make a stator winding.
  • FIG. 1 a shows a lamination plate 20, which images the cross section of the complete stator cross-section in one piece as a complete section.
  • a sheet metal section is suitable for the production of small and large size electrical machines.
  • the fin plate 20 has a stator yoke plate portion 21, a toothed plate portion 22, and a tooth tip portion 23 each provided for forming a stator yoke, a tooth stem, and a tooth tip, respectively, of a stator constructed of stacked laminations.
  • Such lamella plates are punched or cut by laser cutting, and then stacked on each other, so that the individual lamellae are congruent to each other.
  • stator is formed with stator teeth which have a cross-section perpendicular to their longitudinal extent in the winding plane of a stator winding to be applied thereon, which extends in the axial direction (stacking direction).
  • a stator may also be constructed from lamination plates which form a stator section when stacked. The stator sections can then be assembled into a stator.
  • the stator yoke and the stator teeth located in the interior of the stator yoke are made up of separate lamination plates.
  • FIG. 2 is a perspective view of a disk set 1 for constructing an electrical machine, such as a synchronous machine or the like.
  • the illustrated disk set 1 is provided for an internal rotor motor and therefore has an internal recess.
  • the stator 1 comprises a stator yoke 2, from which stator teeth 3 protrude radially into the interior of the cylindrical stator yoke 2.
  • Each of the stator teeth 3 has a tooth shank 4 and a tooth tip 5 arranged at the inward end of the stator tooth 3.
  • the tooth head 5 has an outer contour 7 directed into the interior of the stator 1 or onto a rotor, which defines the region in which the rotor (not shown) of the electric machine to be formed with the stator 1 is arranged.
  • the type of outer contour of the tooth heads is used to define the shape of the air gap between the rotor poles of the rotor and the tooth tips 5.
  • the outer contour of the tooth tips is opposite to a bottom 6 of the tooth head 5, which faces the tooth shaft 4.
  • the underside 6 closes with an extension direction E of the tooth shank, i.
  • the underside 6 extends obliquely to the respective extension direction E of the extension of the toothed shaft 4 and obliquely to one
  • Tooth-head direction U which in rotating electrical machines of a Um- catch direction or a tangential direction corresponds.
  • the tooth-head direction U generally corresponds to the direction in which electrical movement takes place between the stator and the rotor.
  • the stator teeth 3 of the stator 1 are wound with winding wire to produce a stator winding.
  • the thickness of the tooth shank 4 in the tooth-head direction U at the ends of the stator teeth 3 in an axial direction that is, in an axial direction.
  • a transverse direction Z which is perpendicular to the respective extension direction E of the toothed shaft 4 and substantially perpendicular to the tooth head direction U of the corresponding tooth head 5, tapers, so that the cross section of the tooth shaft 4 approaches a rounding there.
  • the wire length required for the winding can thereby be reduced, so that the ohmic resistance of the winding is reduced. This manifests itself in an increased degree of wrinkling of the electrical machine and lower material costs for the winding wire.
  • the width of the tooth head 5 tapers towards at least one of the ends of the stator teeth 3 in the transverse direction Z (axial direction). Since the rotor facing the outer contour of the tooth head 5 defines the air gap and should substantially correspond to a lateral surface of a circular cylinder, the taper takes place on the underside 6 of the tooth head 5, which faces the toothed shaft 4.
  • the stator 1 in a stator section, on which the toothed shaft 4 protrudes from the stator yoke 2 has a toothing 5 corresponding to the taper.
  • a side of the stator 2 facing the toothed shaft 4 is tapered in the transverse direction Z in the region of the section on which the toothed shaft 4 is connected to the stator 2.
  • FIG. 3 shows a detailed illustration of one of the stator teeth 3 in a section.
  • the stator tooth 3, which is shown by way of example in FIG. 3, has two steps at an axial end of the toothed shaft 4, which reduce the thickness of the toothed shaft 4 in the circumferential direction. 3. It can be seen that not only the toothed shaft 4 but also the thickness of the tooth head 5 tapers towards the axial end of the stator tooth 3, in that the toothed shaft 4 is tapered facing bottom 6 of the tooth head 5 is displaced in the direction of the outer contour 7 of the tooth head 5.
  • windings 8 which are wound in several layers around the toothed shaft 4.
  • One or more further turns 9 are provided for exploiting the available winding space in a region 10 which is formed by the space between a perpendicular to the extension of the toothed shaft 4 in the circumferential direction (tooth head direction) and the underside 6 of the tooth head 5.
  • this would mean that these further turns 9 would have been forced into a transitional area 11 in which the toothed shaft 4 merges into the tooth head 5, and thus the thickness of the stator winding where it is in the transition area 1 1 is applied to the tooth head 5, would increase.
  • FIG. 4 shows a cross section through the toothed shaft 4 with the windings 8 of the stator winding wound around it.
  • an insulating mask 12 is provided which has an inner contour 13 which substantially corresponds to the contour of the tapering toothed shaft 4 that the insulating mask 12 can be placed on the axial end of the toothed shaft 4.
  • the insulating mask 12 has an outer contour 14 which is curved and preferably in no section has a curvature which is greater than a predetermined threshold value.
  • the outer contour of the insulating mask 12 is semicircular, so that the walls 9 of the stator winding can rest against the outer contour 14.
  • the insulating mask 12 is preferably formed in two parts, wherein the two parts of the insulating mask 12 are placed on both sides of the toothed shaft 4. For example, identical or nearly identical insulating masks 12 can be placed on both sides of the toothed shaft 4.
  • the cross section of the tooth tips 5 is determined by the design of the magnetic circuit in the electrical machine. Often, the cross-section of the tooth heads 5 is oversized due to the mechanical strength and the manufacturability of the laminations and the building on him insulating masks. By grading the tooth heads 5 of the available space can be used better.
  • the width of the insulating mask 12 is determined by the tooth tips 5 in the widest region with respect to the tooth head direction U (perpendicular to the axial direction and in the direction of relative movement between the stator and the rotor), if the design is based on harmonic tangential transitions of the surfaces without stiffening. is aligned. This is necessary for a good manufacturability of the insulating masks and a good wire position of the winding wire. Due to the stepped design of the tooth cross-sections, the insulating masks 12 shift relative to one another and the axially last tooth head plates would lead to a very small wall thickness of the insulating masks 12 or the insulating masks 12 would have to be greatly oversized in the remaining region. Therefore it is also from this

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne une dent d'enroulement (3) pour une machine électrique comprenant une tige de dent (4) et une tête de dent (5), laquelle est disposée à une extrémité de la tige de dent (4) par rapport à un sens de projection (E) de la tige de dent (4) et laquelle déborde au-dessus de la tige de dent (4) dans une direction de tête de dent (U) perpendiculaire au sens de projection (E), la tête de dent (5) se rétrécissant au moins à une extrémité par rapport à une direction transversale (Z), laquelle s'étend perpendiculairement au sens de projection (E) et perpendiculairement à la direction de tête de dent (U), dans laquelle la tête de dent (5) déborde.
PCT/EP2011/070354 2010-12-27 2011-11-17 Dent d'enroulement pour une machine électrique, composants de machine et machine électrique Ceased WO2012089404A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010064173.1 2010-12-27
DE201010064173 DE102010064173A1 (de) 2010-12-27 2010-12-27 Wicklungszahn für eine elektrische Maschine, Maschinenkomponente und elektrische Maschine

Publications (2)

Publication Number Publication Date
WO2012089404A2 true WO2012089404A2 (fr) 2012-07-05
WO2012089404A3 WO2012089404A3 (fr) 2012-10-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/070354 Ceased WO2012089404A2 (fr) 2010-12-27 2011-11-17 Dent d'enroulement pour une machine électrique, composants de machine et machine électrique

Country Status (2)

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DE (1) DE102010064173A1 (fr)
WO (1) WO2012089404A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3004864A1 (fr) * 2013-04-18 2014-10-24 Sagem Defense Securite Moteur electrique a circuits electriques redondants
DE102014206847A1 (de) 2014-04-09 2015-10-15 Zf Friedrichshafen Ag Stator einer rotierenden elektrischen Maschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015223766A1 (de) * 2015-11-30 2017-06-01 Baumüller Nürnberg GmbH Elektrische Maschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004018208A1 (de) 2004-04-15 2005-11-17 Robert Bosch Gmbh Wicklungsträger für eine elektrische Maschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10064245A1 (de) * 2000-12-22 2002-07-11 Deutsch Zentr Luft & Raumfahrt Stator und Verfahren zum Anordnen von Wicklungen für eine elektrische Maschine
JP4823585B2 (ja) * 2004-09-29 2011-11-24 株式会社デンソー 磁石式発電機
CN102270888B (zh) * 2006-10-13 2013-10-16 株式会社三井高科技 层叠铁芯
KR20080109411A (ko) * 2007-06-13 2008-12-17 주식회사 대우일렉트로닉스 연자성 분말로 제조된 모터용 스테이터 코어

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004018208A1 (de) 2004-04-15 2005-11-17 Robert Bosch Gmbh Wicklungsträger für eine elektrische Maschine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3004864A1 (fr) * 2013-04-18 2014-10-24 Sagem Defense Securite Moteur electrique a circuits electriques redondants
WO2014170414A3 (fr) * 2013-04-18 2015-06-11 Sagem Defense Securite Moteur electrique a circuits electriques redondants
DE102014206847A1 (de) 2014-04-09 2015-10-15 Zf Friedrichshafen Ag Stator einer rotierenden elektrischen Maschine

Also Published As

Publication number Publication date
DE102010064173A1 (de) 2012-06-28
WO2012089404A3 (fr) 2012-10-11

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