WO2023110253A1 - Rotor de machine électrique - Google Patents

Rotor de machine électrique Download PDF

Info

Publication number
WO2023110253A1
WO2023110253A1 PCT/EP2022/081791 EP2022081791W WO2023110253A1 WO 2023110253 A1 WO2023110253 A1 WO 2023110253A1 EP 2022081791 W EP2022081791 W EP 2022081791W WO 2023110253 A1 WO2023110253 A1 WO 2023110253A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
magnets
pole
rotor body
matrix material
Prior art date
Application number
PCT/EP2022/081791
Other languages
German (de)
English (en)
Inventor
Andreas Herzberger
Manuel Gaertner
Konstantin Lindenthal
Christian Prag
Benedikt Lahl
Niklas SCHROEDER
Simon-Frederik Koch
Harald Laue
Florian Herzog
Christoph Hammer
Claus-Christian Oetting
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 WO2023110253A1 publication Critical patent/WO2023110253A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines

Definitions

  • the invention is based on a rotor of an electrical machine according to the species of the main claim.
  • a V-shaped, U-shaped or arcuate magnet layer is formed by a plurality of magnets, in particular permanent magnets, with the respective rotor pole being divided into an inner pole segment and an outer pole segment as seen through the magnet layer in the radial direction.
  • At least one magnetic pocket for receiving the magnets of the magnetic layer is formed in the respective rotor pole between the outer pole segment and the inner pole segment, with the rotor body being surrounded by a rotor sleeve.
  • the rotor according to the invention of an electrical machine with the characterizing features of the main claim has the advantage that the manufacture of the rotor is simplified and the manufacturing costs of the rotor are reduced. According to the invention, this is achieved in that the matrix material of the rotor sleeve is also used for fastening the magnets of the rotor, so that fewer process steps are required to manufacture the rotor. According to the invention it is provided that
  • the rotor sleeve comprises a fiber winding wound around the rotor body, the rotor body has channel-shaped distribution paths radially inside the magnetic layers, each of which opens into one of the magnetic pockets, the magnetic pockets are each designed to be open towards the outer circumference of the rotor body, the fiber winding is embedded in a hardened matrix material, which in the liquid state via the distribution paths and the magnetic pockets is routed to the outer circumference of the rotor body to form a fiber composite of fiber winding and hardened matrix material and which is also used to attach the magnets arranged in the magnet pockets.
  • the matrix material of the rotor sleeve is an adhesive that can be cured, in particular, thermally. In this way, the same adhesive can be used for fixing the filament winding dry wound on the rotor body and for fixing the magnets.
  • the fiber winding of the rotor sleeve is a glass fiber or carbon fiber winding. In this way, a particularly high speed stability can be achieved.
  • the fiber winding of the rotor sleeve is wound up dry onto the rotor body and is subsequently wetted with matrix material via the magnet pockets to form the fiber composite.
  • the same adhesive can be used for fixing the filament winding dry wound on the rotor body and for fixing the magnets.
  • the cycle time in the manufacture of the rotor is reduced, since dry fibers can be wound more quickly than wet fibers wet with matrix material.
  • each rotor pole has an axial channel section for axial distribution in the laminated core and a radial channel section for introduction into the respective magnet pocket. In this way, the matrix material can be distributed particularly uniformly over the axial length of the rotor and from there in the radial direction. A certain amount of leakage from the distributor path into cavities in the laminated core can occur here.
  • Fig.l shows a rotor according to the invention of an electrical machine
  • Fig.2 shows a sectional view of the rotor according to Fig.l
  • Fig.3 shows a partial view of the rotor according to Fig.l.
  • Fig.l shows a rotor according to the invention of an electrical machine.
  • Fig.2 shows a sectional view of the rotor according to Fig.l.
  • the rotor 1 of an electrical machine has a rotor body 3 which can be rotated about a rotor axis 2 and has a plurality of rotor poles 4 each with a pole center 5 and is designed, for example, as a laminated rotor core comprising a large number of laminations 6 .
  • a V-shaped, U-shaped or arc-shaped magnet layer 7 is formed by a plurality of magnets 8, for example permanent magnets.
  • the respective rotor pole 4 is divided into an inner pole segment 10 and an outer pole segment 11 by the magnet layer 7 viewed in the radial direction with respect to the rotor axis 2 .
  • the inner pole segments 10 of all rotor poles 4 are connected to one another in one piece, for example.
  • At least one magnet pocket 12 for receiving the magnets 8 of the magnet layer 7 is formed in the respective rotor pole 4 between the respective outer pole segment 11 and the respective inner pole segment 10 .
  • the rotor body 3 is surrounded by a rotor sleeve 13 radially on the outside with respect to the rotor axis 2 .
  • the rotor sleeve 13 comprises a fiber winding 14 wound around the rotor body 3,
  • the rotor body 3 has channel-shaped distribution paths 16 radially inside the magnet layers 7, each of which opens into one of the magnet pockets 12 (Fig. 2),
  • the magnetic pockets 12 are designed to be open towards the outer circumference of the rotor body 3,
  • the fiber winding 14 is embedded in a hardened matrix material 15, which is conducted in the liquid state via the distribution paths 16 and the magnetic pockets 12 to the outer circumference of the rotor body 3 to form a fiber composite of fiber winding 14 and hardened matrix material 15 and which is also used to fasten the in the magnet pockets 12 arranged magnets 8 is used.
  • the matrix material 15 of the rotor sleeve 13 is, for example, an adhesive that is particularly thermally curable.
  • the fiber winding 14 of the rotor sleeve 13 is, for example, a glass fiber or carbon fiber winding. According to the invention, the fiber winding 14 of the rotor sleeve 13 is wound dry onto the rotor body 3 and is subsequently wetted with matrix material 15 via the distribution paths 16 and the magnetic pockets 12 to form the fiber composite.
  • the respective inner pole segment 10 is connected by the matrix material 15 and the rotor sleeve 13 to the respective outer pole segment 11 without a metal bridge, so that magnetic stray fluxes are avoided.
  • metal webs could also be provided for connecting the respective inner pole segment 10 to the respective outer pole segment 11 .
  • FIG. 3 shows an enlarged partial view of the rotor according to FIG.
  • a distribution path 16 is provided for each rotor pole 4 .
  • one of the distribution paths 16 can also branch out and open into a number of magnetic pockets 12 from a number of rotor poles 4 .
  • the respective distributor path 16 can have an axial channel section 16.1 for the axial
  • the respective distribution path 16 from the respective inner pole segment 10 opens, for example, directly into the respective magnet pocket 12.
  • the matrix material 15 can be injected at the end faces of the rotor body 3 via injection points 19 into the axial channel section 16.1 of the distribution paths 16. The promotion of the matrix material 15 through the distribution paths 16 on the
  • Magnetic ashing 12 to the fiber winding 14 can be effected by the injection pressure and/or by rotating the rotor 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

L'invention concerne un rotor (1) d'une machine électrique comprenant un corps de rotor (3) qui comporte de multiples pôles de rotor (4), une couche d'aimants (7) étant formée par de multiples aimants (8) dans au moins un pôle des pôles de rotor (4), le pôle de rotor (4) respectif étant divisé par la couche d'aimants (7) en un segment interne de pôle (10) et un segment externe de pôle (11) dans la direction radiale, au moins une poche d'aimants (12) destinée à recevoir les aimants (8) de la couche d'aimants (7) étant formée dans le pôle de rotor respectif (4), entre le segment externe de pôle (11) et le segment interne de pôle (10), le corps de rotor (3) étant entouré par un manchon de rotor (13), caractérisé en ce que - le manchon de rotor (13) comprend un enroulement de fibres (14), enroulé autour du corps de rotor (3), - le corps de rotor (3) comporte, radialement à l'intérieur des couches d'aimants (7), des trajets de distribution en forme de canal (16), qui fusionnent individuellement dans l'une des poches d'aimants (12), - les poches d'aimants (12) sont individuellement formées ouvertes en direction de la circonférence externe du corps de rotor (3), - l'enroulement de fibres (14) est intégré dans un matériau de matrice durcissable (15) qui, à l'état liquide, est canalisé au moyen des trajets de distribution (16) et des poches d'aimants (12) vers la circonférence externe du corps de rotor (3) pour former un composite de fibres, composé de l'enroulement de fibres (14) et du matériau de matrice durci (15), et qui sert en outre à fixer les aimants (8) disposés dans les poches d'aimants (12).
PCT/EP2022/081791 2021-12-17 2022-11-14 Rotor de machine électrique WO2023110253A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021214564.7 2021-12-17
DE102021214564.7A DE102021214564A1 (de) 2021-12-17 2021-12-17 Rotor einer elektrischen Maschine

Publications (1)

Publication Number Publication Date
WO2023110253A1 true WO2023110253A1 (fr) 2023-06-22

Family

ID=84370505

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/081791 WO2023110253A1 (fr) 2021-12-17 2022-11-14 Rotor de machine électrique

Country Status (2)

Country Link
DE (1) DE102021214564A1 (fr)
WO (1) WO2023110253A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001157394A (ja) * 1999-11-29 2001-06-08 Mitsubishi Electric Corp 磁石埋込型回転子
JP2002034187A (ja) * 2000-07-13 2002-01-31 Mitsubishi Electric Corp 磁石埋込型回転子
EP2113986A1 (fr) * 2008-04-29 2009-11-04 Siemens Aktiengesellschaft Procédé d'encapsulation d'aimants permanents d'un rotor d'un générateur
US20190181709A1 (en) * 2017-12-08 2019-06-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rotor with cooling
US20200266677A1 (en) 2017-09-29 2020-08-20 Hitachi Automotive Systems, Ltd. Rotor Core, Rotor of Rotary Electrical Machine, Rotary Electrical Machine, and Automotive Auxiliary Electrical System

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001157394A (ja) * 1999-11-29 2001-06-08 Mitsubishi Electric Corp 磁石埋込型回転子
JP2002034187A (ja) * 2000-07-13 2002-01-31 Mitsubishi Electric Corp 磁石埋込型回転子
EP2113986A1 (fr) * 2008-04-29 2009-11-04 Siemens Aktiengesellschaft Procédé d'encapsulation d'aimants permanents d'un rotor d'un générateur
US20200266677A1 (en) 2017-09-29 2020-08-20 Hitachi Automotive Systems, Ltd. Rotor Core, Rotor of Rotary Electrical Machine, Rotary Electrical Machine, and Automotive Auxiliary Electrical System
US20190181709A1 (en) * 2017-12-08 2019-06-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rotor with cooling

Also Published As

Publication number Publication date
DE102021214564A1 (de) 2023-06-22

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