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WO2016005081A1 - Élément d'enroulement pour une machine à flux axial, unité de stator pour une machine à flux axial ainsi que procédé de fabrication d'une unité de stator pour une machine à flux axial - Google Patents

Élément d'enroulement pour une machine à flux axial, unité de stator pour une machine à flux axial ainsi que procédé de fabrication d'une unité de stator pour une machine à flux axial Download PDF

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Publication number
WO2016005081A1
WO2016005081A1 PCT/EP2015/060304 EP2015060304W WO2016005081A1 WO 2016005081 A1 WO2016005081 A1 WO 2016005081A1 EP 2015060304 W EP2015060304 W EP 2015060304W WO 2016005081 A1 WO2016005081 A1 WO 2016005081A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding
stator
portions
elements
loop
Prior art date
Application number
PCT/EP2015/060304
Other languages
German (de)
English (en)
Inventor
Alexander Kudlek
Wolfgang Sauer
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 WO2016005081A1 publication Critical patent/WO2016005081A1/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
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots

Definitions

  • the invention relates to rotary electric machines with axially aligned stator teeth of a stator unit, in particular electrical machines with a pancake. Furthermore, the present invention relates to methods for arranging a stator winding on a stator of an electric machine. State of the art
  • windings which extend between stator teeth of a ring-shaped stator body.
  • the windings are usually by pulling the winding wire using a
  • Windings produced by a plug-in method are typically formed by open forming coils which, in order to form a winding, must be folded prior to insertion into the stator body and electrically connected together at their ends.
  • the open form coils, from which the windings are produced with the plug-in technology usually have a U-shape and are permanently connected to each other after interlocking with a suitable tool at their coil ends by a suitable joining method.
  • the stator teeth can be wound directly with the winding wire or wound bobbin on the
  • a stator for an axial flow machine whose stator unit is provided with a meandering winding.
  • the flat meandering winding has loops that extend in a plane substantially transverse to the axial direction.
  • the document WO 2008/071 147 discloses an axial flow machine with a stator unit.
  • the stator teeth protrude in the axial direction of the stator in the direction of a disk rotor.
  • the stator teeth are provided with pre-wound coil elements, which are each connected in series via a ring conductor.
  • WO 2010/034082 discloses pre-wound coil elements on coil carriers, which are placed on the stator teeth of a stator unit for an axial flux machine projecting in the axial direction.
  • the number of contacts of open coil ends should be reduced and the winding heads should be made as space-saving as possible.
  • a winding element for producing a stator unit for an electrical machine, in particular an axial flux machine, wherein the winding element is formed from a conductor strand and comprises:
  • connection portions provided between the loop portions for uniformly spacing the loop portions from each other, at least one of the connection portions being provided with a pitch in the arrangement direction of the plurality of loop portions and across the extension of the loop portions.
  • a stator unit for an electric machine comprising:
  • integrally formed winding element is to provide a conductor strand having a plurality of loop portions which surround each other not directly adjacent stator teeth in a plurality of winding planes when placing the winding element on stator teeth of a stator.
  • the loop portions are further connected via one or more connecting portions, each having a gradation. This makes it possible to place the respective winding element offset relative to one or more further identical winding elements on stator teeth of the stator body, so that the loop sections of each of the winding elements lie in a plurality of winding planes.
  • the plurality of winding planes are formed by the sections of the winding elements which are formed between the end of the winding element and a step or between two stages of the winding element.
  • the lengths of the connecting sections can be the same, so that they are each matched to a corresponding - Zi eehen axially offset staggered section of another winding element can be placed.
  • a stator with multiple winding elements can be formed by these are arranged in cascade.
  • the end portions of the winding elements can then be connected together in a suitable manner.
  • stator unit for an axial flow machine in which the conductor strands of the winding do not essentially intersect in the region of the winding profile, since the winding elements are arranged by staggering on the stator teeth of the stator unit.
  • the winding head height can be significantly reduced. Furthermore, by providing a plurality of loop sections per winding element, the number of connection sites between the contacting sections of winding elements can be reduced, and it can be achieved that only one connection point between the contacting sections of two winding elements is provided per groove of the stator body.
  • a stator can be provided in a flexible manner with a winding.
  • each of the connecting sections between the loop sections can be provided with a graduation.
  • the one or more gradations may have a step height which corresponds at least to the width of the conductor strand in the direction of the grading and in particular corresponds approximately to the width of the conductor strand in the direction of grading.
  • the conductor strand may be provided at its ends with a first end portion and a second end portion, each projecting in a direction of the winding element, which is opposite to the extension of the plurality of loop portions and / or transversely to the winding plane of the respective
  • Winding element runs.
  • the first end portion may have a feed portion that extends opposite to the direction of the grading.
  • first and / or second end section directly adjoin a loop section.
  • the winding element may extend in the shape of a circle segment.
  • connection portions may be arranged along a radially outer periphery of the arrangement of the stator teeth.
  • two superimposed winding elements can be arranged offset relative to one another by one or more stator teeth, wherein in particular the loop sections and the winding sections completely form winding planes filled with sections of conductor strands of winding elements.
  • the conductor strands of the winding elements may each be provided at their ends with a first end portion and a second end portion, respectively, projecting radially outward and are electrically contacted to a respective contact portion.
  • first end portion of one of the winding members may be provided with a feeding portion to feed the corresponding contact portion to a contact portion of the second end portion of another one of the winding members, the first end portion and the second end portion of the two winding members being connected to each other, particularly by a material bonding method ,
  • a cooling device may be present, which is surrounded by the first and second end portions, so that heat development in the stator unit via the connecting portions and the end portions can be derived.
  • the cooling device may be formed concentrically with the stator unit and have a circulating coolant channel in order to guide a coolant.
  • Stator unit provided with the above winding elements, wherein the winding elements are mounted on a stator body comprising an annular stator yoke and stator teeth which project from the stator yoke in the axial direction and are uniformly spaced, so that between each two stator teeth, a groove is formed the winding elements are staggered arranged on the stator teeth, that the loop portions each surround a stator tooth and the gradations of several of the winding elements in the axial direction are superimposed.
  • two superimposed winding elements can be arranged offset relative to one another by one or more stator teeth, so that in particular the loop sections and the winding sections completely form winding planes filled with sections of conductor strands of winding elements.
  • Figures 1 a and 1 b is a perspective view and a
  • Figures 2a and 2b is a plan view of a stator with inserted winding elements and a corresponding
  • FIG. 3 shows a side view of a stator unit, in which the
  • Stator winding is provided by winding elements of Figures 1 a and 1 b;
  • FIGS. 4a and 4b show a plan view of a stator unit and a sectional view through the stator unit, which is provided with a stator winding of winding elements, wherein the
  • Stator winding is cooled by a cooling device.
  • Figures 1 a and 1 b show a perspective view of a winding element 1 and a plan view of an exemplary winding element 1 for forming a winding for a stator of an electric machine, in particular a Axialmannmaschine.
  • the winding element 1 consists essentially of a conductor strand with one or more parallel conductors.
  • the winding element 1 comprises a conductor strand with a single conductor.
  • the conductor (s) of the conductor strand are made of a material with good electrical conductivity, such as copper or aluminum, for example, and are coated with an insulating varnish or another insulating layer.
  • FIGS. 2a and 2b are a plan view in the axial direction of a section of a stator 2 for the electric machine and a
  • FIG. 1 Cross-sectional view of a section of the stator 2 shown, which has an annular stator yoke 21 and projecting therefrom in the axial direction stator teeth 22. Between the stator teeth 22 grooves 23 are formed for receiving the conductor strands of the winding.
  • the winding element 1 shown in FIGS. 1 a and 1 b basically has a circular segment-shaped extension in a circumferential direction U, whose
  • Radius corresponds to a radius of an annular arrangement of stator teeth 22 of a Stator body.
  • the winding element 1 has a number of uniformly spaced loop portions 1 1, which are interconnected via connecting portions 12. At the ends of the winding element 1 in the circumferential direction U end portions 13 are provided which are intended to enable a suitable contacting of the winding element 1.
  • each of the loop portions 11 extends from an outer circumference UA of the stator unit 2 through one of the grooves 23 between adjacent stator teeth 22 radially inward to an inner circumference U1 of the stator unit 2 and through an adjacent thereto groove 23 between stator teeth 22 radially outward.
  • the dimension of the loop portions 1 1 is therefore chosen so that they surround a stator tooth 22 and that the adjoining connecting portion 12 rests against the radially outer edges of the not enclosed by loop portions 1 1 stator teeth 22. In this way, a very compact structure of the stator 2 can be ensured.
  • the loop portions 1 1 have a distance from each other, which corresponds to three stator teeth 22 in the present case. This is useful for forming a three-phase electric machine, since each of the winding elements 1 can be associated with only one phase. However, it can also be provided that the distance between the stator teeth 22, which are surrounded by the loop sections 1 1 of a winding element 1, corresponds to a different number of stator teeth 22. In particular, for three-phase electrical machines, multiples of the number of phases or, in the case of electrical machines with a different number of phases, one or more times the number of phases can be used as distances between the stator teeth 22, which are surrounded by the loop sections 11 of the winding element 1. be provided.
  • the conductor strands of the winding elements 1 are guided radially outwards after the loop sections 1 1 provided at their ends in the circumferential direction U, where the end sections 13 of the conductor strand each form a contact section. This serves to produce an electrical connection to the winding element 1 and to electrically connect this in particular with contact portions of further winding elements 1.
  • the connecting portions 12 are each provided with a step 14 which extends in a direction transverse to the extension of the connecting portions 12 and transversely to the extension of the loop portions 1 1.
  • gradations 14 are provided in the axial direction or transversely to the winding plane in the course of the entire extent of the winding element 1 (in the circumferential direction U).
  • the gradations 14 each extend in the same directions, ie. H. with respect to a direction of extension of the winding element 1 in each case in an axial direction. In particular, in the perspective view of Figure 1 a, this is clearly visible.
  • the steps 14 preferably have a height which corresponds to the total axial width of the conductor strand from which the winding element 1 is formed (including a possible insulation layer).
  • this can be placed on an annular stator 2 with substantially uniformly spaced in the axial direction in the circumferential direction U stator teeth 22, and on the other, several winding elements 1 staggered offset from each other on the stator teeth 22, so that the gradations 14 lie one above the other in the axial direction, as for example in FIG.
  • FIG. 3 which is a side view of the stator assembly, is shown.
  • each loop portion 1 1 of the winding element 1 is located in a winding plane, wherein at least two loop portions 1 1 of a single winding element 1 lie in two different winding levels. In the illustrated embodiment, each loop portion 1 1 lies in another winding plane.
  • the connecting sections 12 are also located one above the other in winding planes, so that a crossing of the conductor strands of the winding elements 1 on the outer circumference UA of the stator teeth 22 can be avoided.
  • a first end portion 13a of the end portions 13 is located on a lowermost winding plane with respect to the axial direction (winding plane immediately adjacent to the groove bottom formed by the stator yoke 21). Due to the gradations 14, a second end section 13b of the end sections 13 of the winding element 1 leaves the respective slot 23 in a different winding plane.
  • the first and second end portions 13a, 13b may each have at their ends contacting portions which extend in the radial direction and thereby facilitate electrical contacting.
  • the first and second end sections 13a, 13b can thereby rest against each other substantially parallel.
  • An electrical connection between a first end portion 13a of the winding element 1 and a second end portion 13b of a further winding element 1 can be produced in a simple manner by soldering or another cohesive method.
  • the winding elements 1 are formed such that their end sections 13a, 13b are extended outwardly in the radial direction.
  • a cooling device 4 may be provided with a circumferential coolant channel 41, as shown in the cross-sectional view of Figure 4b.
  • the cooling device 4 may be made of a thermally conductive material, such. As a metallic material, be formed.
  • the cross-section of the cooling device 4 is preferably rectangular, so that this at the outer edge of the through the connecting portions 12 of Winding elements 1 formed outer circumference can create.
  • the cooling device 4 can also circulate the stator unit 2 concentrically.
  • the cooling device 4 may be formed from segment-shaped cooling elements 42, which at their ends for the coolant channel 41 supply or discharge lines 43 for a coolant.
  • the number of segment-shaped cooling elements 42 of the cooling device 4 can be chosen arbitrarily, wherein the segment-shaped cooling elements 42 can be interconnected by connecting pieces, so that a coolant flow through the resulting circumferential coolant channel 41 is made possible.
  • the segment-shaped cooling elements 42 can be connected to each other with their adjacent supply and discharge lines 43 and at one position, the supply and discharge lines 43 can be provided for supplying or discharging coolant.
  • the cooling device 4 By connecting the cooling device 4 directly to the winding head, a close connection between the winding of the stator 2 and the cooling device 4 can be ensured.
  • the second end portion 13b of the coil members 1 When the second end portion 13b of the coil members 1 is provided with a bent feed portion 15, it may extend along an outer circumference of the cooler 4 so as to be sandwiched and held between the outer periphery of the connecting portions 12, the end portions 13a, 13b and the feed portion 15.

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

Abstract

L'invention concerne un élément d'enroulement (1) pour la fabrication d'une unité de stator (2) pour une machine électrique, en particulier une machine à flux axial, l'élément d'enroulement (1) étant constitué d'un faisceau de conducteur et comprenant : plusieurs sections de boucle (11) destinées à être placées sur des dents du stator (22) d'un corps de stator ; et une ou plusieurs sections de liaison (12), lesquelles sont prévues entre les sections de boucle (11), afin d'espacer les unes des autres les sections de boucle (11) de manière uniforme dans la direction d'agencement des plusieurs sections de boucle (11), au moins l'une des sections de liaison (12) étant dotée d'une gradation (14) perpendiculairement à l'extension des sections de boucle (11).
PCT/EP2015/060304 2014-07-11 2015-05-11 Élément d'enroulement pour une machine à flux axial, unité de stator pour une machine à flux axial ainsi que procédé de fabrication d'une unité de stator pour une machine à flux axial WO2016005081A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014213506.0 2014-07-11
DE102014213506.0A DE102014213506A1 (de) 2014-07-11 2014-07-11 Wicklungselement für eine Axialflussmaschine, Statoreinheit für eine Axialflussmaschine sowie Verfahren zur Herstellung einer Statoreinheit für eine Axialflussmaschine

Publications (1)

Publication Number Publication Date
WO2016005081A1 true WO2016005081A1 (fr) 2016-01-14

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PCT/EP2015/060304 WO2016005081A1 (fr) 2014-07-11 2015-05-11 Élément d'enroulement pour une machine à flux axial, unité de stator pour une machine à flux axial ainsi que procédé de fabrication d'une unité de stator pour une machine à flux axial

Country Status (2)

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DE (1) DE102014213506A1 (fr)
WO (1) WO2016005081A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111953096A (zh) * 2020-09-11 2020-11-17 浙江盘毂动力科技有限公司 一种轴向磁场电机及其冷却结构
US12077561B2 (en) 2022-11-02 2024-09-03 Novo Nordisk A/S CNP compounds

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114301197B (zh) * 2021-08-02 2024-06-04 华为数字能源技术有限公司 一种电机定子、驱动电机和电动汽车

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2502068A (en) * 1947-05-26 1950-03-28 Fairbanks Morse & Co Insulator for wound core structures
JPS5144803U (fr) * 1974-09-30 1976-04-02
WO1998007227A1 (fr) * 1996-08-09 1998-02-19 The Turbo Genset Company Limited Machine electrique rotative
JP2000333433A (ja) * 1999-05-20 2000-11-30 Mosutetsuku:Kk リニアモーター用コイル装置
WO2004047253A1 (fr) * 2002-11-15 2004-06-03 In Motion Technologies Pty Ltd Dispositif electromagnetique pluriphase a disposition amelioree des enroulements conducteurs
US20090260217A1 (en) * 2008-04-18 2009-10-22 Denso Corporation Method of manufacturing coil assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112007003031A5 (de) 2006-12-14 2009-09-10 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Elektrische Maschine und Verfahren zum Herstellen einer solchen
CN102239623B (zh) 2008-09-29 2015-06-03 动态技术股份有限公司 用于轴向磁通电机的绕组绝缘装置
JP3189348U (ja) 2011-01-25 2014-03-13 コリオリス パワー システムズ リミテッド 軸方向磁束電気機械

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2502068A (en) * 1947-05-26 1950-03-28 Fairbanks Morse & Co Insulator for wound core structures
JPS5144803U (fr) * 1974-09-30 1976-04-02
WO1998007227A1 (fr) * 1996-08-09 1998-02-19 The Turbo Genset Company Limited Machine electrique rotative
JP2000333433A (ja) * 1999-05-20 2000-11-30 Mosutetsuku:Kk リニアモーター用コイル装置
WO2004047253A1 (fr) * 2002-11-15 2004-06-03 In Motion Technologies Pty Ltd Dispositif electromagnetique pluriphase a disposition amelioree des enroulements conducteurs
US20090260217A1 (en) * 2008-04-18 2009-10-22 Denso Corporation Method of manufacturing coil assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111953096A (zh) * 2020-09-11 2020-11-17 浙江盘毂动力科技有限公司 一种轴向磁场电机及其冷却结构
US12077561B2 (en) 2022-11-02 2024-09-03 Novo Nordisk A/S CNP compounds

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