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WO2021219164A1 - Unité stator pour une machine électrique et machine électrique correspondante - Google Patents

Unité stator pour une machine électrique et machine électrique correspondante Download PDF

Info

Publication number
WO2021219164A1
WO2021219164A1 PCT/DE2021/100369 DE2021100369W WO2021219164A1 WO 2021219164 A1 WO2021219164 A1 WO 2021219164A1 DE 2021100369 W DE2021100369 W DE 2021100369W WO 2021219164 A1 WO2021219164 A1 WO 2021219164A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
carrier
alignment
stator unit
positioning
Prior art date
Application number
PCT/DE2021/100369
Other languages
German (de)
English (en)
Inventor
Alexandre Fischer
Andreas Ruppert
Original Assignee
Schaeffler Technologies AG & 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 & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2021219164A1 publication Critical patent/WO2021219164A1/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
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/03—Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations

Definitions

  • Stator unit for an electrical machine and corresponding electrical machine
  • the invention relates to a stator unit for an electrical machine, with a stator support, a stator attached to the stator support with stator teeth, concentrated windings arranged on the stator teeth, at least one connection ring for connecting the windings and a carrier device carrying the at least one connection ring.
  • the invention also relates to a corresponding electrical machine with a rotor and such a stator unit.
  • Electrical machines are used in a wide variety of application areas. An example is the use of such electrical machines in motor vehicles in the form of electric hybrid vehicles and in purely electric vehicles.
  • the electrical machines can be designed as drive machines, for example as wheel hub motors.
  • An electrical machine usually has a stator and a rotor that interact magnetically. Different winding techniques are known for forming the coils for the stator. The so-called concentrated winding is used for a particularly dense and compact winding. In this winding technology, individual windings are provided on the individual stator teeth, which enables a very high packing density, the adjacent windings are extremely close to one another.
  • One electrical machine that has been increasingly used recently is the permanent magnet synchronous machine (PSM).
  • PSM permanent magnet synchronous machine
  • Such a permanently excited synchronous machine consists of a stator to be energized and a permanently excited rotor.
  • the stator unit usually consists of a stator with (wire) windings, a stator carrier, a connection ring and a connection terminal for connecting power electronics (LE).
  • Other electrical machines with concentrated stator windings are asynchronous machines (ASM) and separately excited synchronous machines (FSM).
  • Electrical machines with concentrated windings have different numbers of stator teeth. As a rule, three consecutive stator teeth form a pole pair. For electrical machines with a concentrated winding arrangement and star connection for the stator, the individual pole pairs, for example three teeth, must be coupled / connected to one another.
  • connection rings In series-produced permanent magnet synchronous machines (PSM), asynchronous machines (ASM) and separately excited synchronous machines (FSM), the connection rings are often placed, positioned and centered directly on the stators (1 laminated core with distributed winding per x individual teeth with concentrated winding). Three phase-related busbars and, if necessary, a star bar are installed on the carrier device. The connection to the power electronics is established from these three busbars via the connection terminal.
  • interconnection rings In the following these rails are to be referred to as interconnection rings. Notwithstanding this, the rails are sometimes referred to as a connecting ring in their entirety.
  • the document DE 102018 119831 A1 describes an electrical machine with egg ner stator unit, which has a stator, a stator attached to the stator with stator teeth, arranged on the stator teeth concentrated windings, at least one interconnection ring for interconnecting the windings and at least one interconnection ring carrying the having annular carrier device.
  • a connection terminal for corresponding power electronics is also attached to the carrier device.
  • stator unit for an electrical machine, which has a stator carrier, a stator with stator teeth attached to the stator carrier, concentrated windings arranged on the stator teeth, at least one connection ring for connection of the windings and a carrier device carrying the at least one connection ring
  • the stator unit furthermore has a positioning arrangement having a plurality of positioning elements for positioning the carrier device and / or the connection ring relative to the stator carrier.
  • the positioning elements are distributed circumferentially with respect to an axis forming the axis of rotation of the electrical machine between the stator carrier and the carrier device.
  • the stator carrier is permanently installed in the housing of the electrical machine, so it is machine-proof.
  • the carrier device, the at least one interconnection ring and / or further components of the electrical machine that are aligned with it are then simply aligned in a machine-fixed manner via the positioning arrangement. If necessary, these components are also fastened to the stator carrier via the positioning elements.
  • the positioning elements are arranged on the carrier device and have alignment structures for interaction with a respective contour of the stator carrier or (ii) are arranged on the stator carrier and alignment structures for interaction with a respective contour have the carrier device.
  • the positioning arrangement is designed in such a way that the interaction of alignment structures and contours results in an axial alignment. th and / or radial alignment and / or circumferential alignment with respect to the axis caused.
  • the contours or the alignment structures include step structures.
  • the step structures bring about the axial and radial alignment in particular.
  • At least one of the contours and the alignment structure that interacts with it form a projection-recess engagement system.
  • a recess is provided in the contour and a recess engaging projection is provided in the alignment structure or
  • a recess is provided in the alignment structure and a recess engaging projection is provided in the contour.
  • the projection-recess engagement system is designed in such a way that it effects the circumferential alignment.
  • the stator unit has a connection terminal with a number of connection elements corresponding to the number of connection rings.
  • connection terminal is determined directly or indirectly via the connection terminal.
  • the electrical machine In the case of the electrical machine according to the invention with a rotor and a stator unit comprising a stator, it is provided that this stator unit is designed as a stator unit mentioned above. Furthermore, the electrical machine generally has a housing and the aforementioned power electronics.
  • Fig. 2 Details of a stator carrier, a stator and a corresponding circuit arrangement of the stator unit in a sectional view
  • Fig. 3 Corresponding details in the area of a positioning element for positioning the interconnection arrangement relative to the stator support in a sectional representation
  • FIG. 4 the details of FIG. 3 from a different perspective
  • FIG. 1 shows components of a stator unit 10 for an electrical machine, namely the components of a stator 12 of the electrical machine and components that are directly related to this stator 12.
  • the stator 12 has egg NEN annular stator carrier 14 and a plurality of circumferentially arranged around an axis forming the axis of rotation of the electrical machine axis 16, which are surrounded by corresponding windings 18 and are therefore not directly visible.
  • the windings 18 are concentrated windings, so that a concentrated winding structure results.
  • One of the stator teeth 16 is shown as an example in the sectional view of FIG.
  • FIG. 1 shows an interconnection arrangement 20 for the electrical interconnection of the stator windings 18 of the stator 12 arranged on the stator teeth 16 Support device 24 are held.
  • Each of the interconnection rings 22 is a type of ring-shaped busbar.
  • the interconnection arrangement 20 has Furthermore, a connection terminal 26 with connection elements 28, of which only two of three connection elements 28 are shown here in FIG. These connection elements 26 are often also referred to as HV contacts. The position of power electronics that can be connected / connected to the connection terminal 26 is determined via the connection terminal.
  • the interconnection arrangement 20 furthermore has a positioning arrangement 30 with positioning elements 32 for positioning the carrier device 24 and / or the interconnection rings 22 relative to the stator carrier 14.
  • the positioning elements 32 are arranged on the carrier device 24 and, in this specific case, are part of the carrier device 24.
  • One of these positioning elements 32 is shown in FIG. Details of the positioning arrangement 30 and its positioning elements 32 are discussed in connection with FIGS. 3 to 5.
  • the finger-shaped connection element 26 is connected to the carrier device 24 via a threaded bushing 34 and makes contact via its free end 36 with contacts 38 of the corresponding connection ring 22.
  • FIG. 2 shows details of the stator 12, the stator carrier 14 and the corresponding interconnection arrangement 20 of the stator unit 10 in a sectional view through one of the stator teeth 16.
  • the corresponding Wicklun gene 18 contact the interconnection rings 22 with their winding ends forming a respective phase input.
  • one of the connection elements 28 is arranged on the other side of the carrier device 24.
  • FIG. 3 shows corresponding details in the area of one of the positioning elements 32 for positioning the interconnection arrangement 20 relative to the stator carrier 14 in a sectional illustration.
  • the positioning element 32 is arranged on a base body of the carrier device 24 and has an alignment structure 40 for interacting with the contour 42 of an edge of the stator carrier 14.
  • the carrier device 24 and the positioning elements 32 are made from one piece or, in other words, the carrier device 24 has the positioning elements 32.
  • the alignment structure 40 is designed as a step structure 44 and is supported radially and axially on the contour 42 of the stator carrier 14 in relation to the axis A.
  • FIG. 4 shows the details of FIG. 3 from a different perspective.
  • the alignment structure 40 of the positioning element 32 of the carrier device 24 with its step structure 44 overlaps the (edge) contour 42 formed by the end face 46 and inner radius 48 of the stator carrier 14 and axially on the contour 42 of the stator carrier 14.
  • FIG. 5 shows details of another positioning element 32 and its surroundings within the stator unit 10. This positioning element 32 is more like a cam.
  • the alignment structure 40 of the positioning element 32 and the corresponding contour 42 of the stator carrier are configured somewhat differently.
  • the contour 42 is shaped by a recess 50 in the stator carrier 14 and the alignment structure 40 by a projection 52 engaging in this recess 50.
  • the recess 50 and the projection 52 engaging in the recess 50 form a projection-recess engagement system 54.
  • This projection-recess engagement system 54 is now designed so that it allows circumferential alignment of the carrier device 24 relative to the stator carrier 14 with respect to the Causes the axis of rotation of the electrical machine forming the axis.
  • the carrier device 24 for the interconnection ring 22 is made with a certain number of finger-shaped positioning elements 32 (for short: fingers) on the outer diameter, as shown in FIGS. 1, 3 and 4 or with cam-shaped positioning elements 32 (for short: cams), as shown in FIG 5 shown.
  • the stator carrier 14 is produced with corresponding recesses 50 (notches). Included
  • This direct positioning of the carrier device 24 and the interconnection ring 22 on the stator carrier ensures a very short tolerance chain to the stator carrier, which results in a more precise position of the connection terminal 26 for fixing the housing of the electrical machine.
  • This increased positioning accuracy enables either “stricter accuracy requirements” to be met or, in the case of “softer accuracy requirements”, other manufacturing tolerances can now be opened, which can reduce costs for corresponding parts of the electrical machine.
  • connection ring 22 results in a safer, simpler and / or faster assembly process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

L'invention concerne une unité stator (10) pour une machine électrique, comprenant un support de stator (14), un stator (12) qui est fixé au support de stator (14) et comprend des dents de stator (16), des enroulements concentriques (18) disposés sur les dents de stator (16), au moins une bague de liaison (22) pour relier les enroulements (18) et un dispositif de support (24) qui supporte l'au moins une bague de liaison (22). Selon l'invention, l'unité stator (10) comporte un ensemble de positionnement (30) qui comporte de multiples éléments de positionnement (32) pour positionner le dispositif de support (24) et/ou la bague de liaison (22) par rapport au support de stator (14), chaque élément de positionnement (32) étant disposé de manière répartie sur la circonférence entre le support de stator (14) et le dispositif de support (24) par rapport à un axe qui forme l'axe de rotation de la machine électrique. L'invention concerne en outre une machine électrique correspondante dotée d'un rotor et d'une telle unité stator (10).
PCT/DE2021/100369 2020-04-30 2021-04-22 Unité stator pour une machine électrique et machine électrique correspondante WO2021219164A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020111760.4 2020-04-30
DE102020111760.4A DE102020111760A1 (de) 2020-04-30 2020-04-30 Statoreinheit für eine elektrische Maschine und entsprechende elektrische Maschine

Publications (1)

Publication Number Publication Date
WO2021219164A1 true WO2021219164A1 (fr) 2021-11-04

Family

ID=75887788

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2021/100369 WO2021219164A1 (fr) 2020-04-30 2021-04-22 Unité stator pour une machine électrique et machine électrique correspondante

Country Status (2)

Country Link
DE (1) DE102020111760A1 (fr)
WO (1) WO2021219164A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0777312A2 (fr) * 1995-12-01 1997-06-04 ebm Werke GmbH & Co. Stator pour moteurs électriques
US20070278876A1 (en) * 2006-06-05 2007-12-06 Nidec Corporation Motor
DE102018119831A1 (de) 2018-08-15 2020-02-20 Schaeffler Technologies AG & Co. KG Elektrische Maschine
DE102018216463A1 (de) * 2018-09-26 2020-03-26 Zf Friedrichshafen Ag Verschaltungsanordnung für eine elektrische Maschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005051508A1 (de) 2005-10-26 2007-05-16 Sew Eurodrive Gmbh & Co Elektromotor und Wickelverfahren
DE102015117112A1 (de) 2015-10-07 2017-04-13 Pierburg Gmbh Stator für einen elektronisch kommutierten Gleichstrommotor
DE102016208150A1 (de) 2016-05-12 2017-11-16 Zf Friedrichshafen Ag Stator einer elektrischen Maschine mit einer Verschaltungseinrichtung für Statorspulen und elektrische Maschine mit einem derartigen Stator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0777312A2 (fr) * 1995-12-01 1997-06-04 ebm Werke GmbH & Co. Stator pour moteurs électriques
US20070278876A1 (en) * 2006-06-05 2007-12-06 Nidec Corporation Motor
DE102018119831A1 (de) 2018-08-15 2020-02-20 Schaeffler Technologies AG & Co. KG Elektrische Maschine
DE102018216463A1 (de) * 2018-09-26 2020-03-26 Zf Friedrichshafen Ag Verschaltungsanordnung für eine elektrische Maschine

Also Published As

Publication number Publication date
DE102020111760A1 (de) 2021-11-04

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