WO2009047094A1 - Rotor pour machine électrique, et machine électrique correspondante - Google Patents

Rotor pour machine électrique, et machine électrique correspondante Download PDF

Info

Publication number
WO2009047094A1
WO2009047094A1 PCT/EP2008/062365 EP2008062365W WO2009047094A1 WO 2009047094 A1 WO2009047094 A1 WO 2009047094A1 EP 2008062365 W EP2008062365 W EP 2008062365W WO 2009047094 A1 WO2009047094 A1 WO 2009047094A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
hub
rotor hub
metallic material
electric machine
Prior art date
Application number
PCT/EP2008/062365
Other languages
German (de)
English (en)
Inventor
Barlas Turgay
Denis Kern
Andreas Herzberger
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 WO2009047094A1 publication Critical patent/WO2009047094A1/fr

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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • 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
    • H02K1/278—Surface mounted magnets; Inset 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
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
    • H02K17/168—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having single-cage rotors

Definitions

  • the invention relates to a rotor according to the preamble of claim 1 and to an electric machine according to the preamble of claim 10.
  • Rotors of electrical machines generally comprise a rotatably mounted in a housing of the electric machine rotor shaft and a plurality of rotatably connected to the rotor shaft fins or rotor laminations, which are equipped with a rotor winding, permanent magnets or asynchronous machines with a short-circuit cage. While the lamination or rotor lamination packages are typically mounted directly on the rotor shaft on smaller electric machines, rotors of large electrical machines, such as electric machines for automotive hybrid powertrains, typically include a hollow rotor hub rigidly coupled to the rotor shaft the rotor shaft is connected and carries at its periphery the lamellae or rotor lamination packages.
  • the space provided in the hollow interior of the rotor hub serves to accommodate the stator winding, while it can be used in internal rotors to accommodate further components of the electric machine or components of adjacent components of the hybrid drive, such as a clutch.
  • the rotor hub is the primary element of the rotor that transmits torque in most hybrid drive modes such as starting, start-stop, boost, electric drive and recuperation.
  • the rotor hub must be durably resistant to mechanical vibrations and shocks in the drive train and meet all requirements of existing in the space environment media or prevailing temperatures.
  • the rotor hub is made of metal.
  • the use of a metallic material results in that the rotor has a large rotating mass and the electric machine has a considerable total weight. While the large rotating mass of the rotor causes a higher load on the rotor bearing and thus a reduction in mileage and usable power of the electric machine, the high total weight of the electric machine due to its influence on the vehicle weight leads to increased fuel consumption.
  • the invention has the object to improve a rotor and an electric machine of the type mentioned in that a reduction of the rotating mass of the rotor and the total weight of the electric machine is made possible.
  • the rotor hub is at least for the most part made of a non-metallic material.
  • non-metallic materials generally have a significantly lower specific weight than the metallic materials used hitherto for rotor hubs, the use of a non-metallic material for producing the rotor hub can reduce both the rotating mass of the rotor and the total weight of the electric machine.
  • the former makes it possible to reduce the load on the rotor bearings and the frictional losses in the rotor bearings, which at the same time an increase in mileage and an increase in the useful power of the electric machine, ie the usable drive power when used as an electric motor and the generated electrical power when used as a generator , If the electric machine forms part of a hybrid drive of a motor vehicle, the latter leads to a not inconsiderable reduction of the vehicle weight, so that either its fuel consumption is reduced or alternatively with the same vehicle weight or fuel consumption of the installation of other technical components is possible.
  • the powertrain of a motor vehicle equipped in its hybrid drive with one or two electric machines according to the invention has a lower mass moment of inertia due to the reduction of the rotor weight by up to 30% compared to rotors with metallic rotor hubs.
  • the nonmetallic materials which are suitable for producing the rotor hub often also have a greater vibration damping capacity than the metallic materials, whereby when the electric machine is used in a hybrid drive in the region of the critical vibration frequencies caused by the internal combustion engine of the hybrid drive up to 400 Hz less likely to cause the appearance of destructive resonances.
  • Another advantage of the solution according to the invention is that an electric machine with a rotor hub made of a non-metallic material is less susceptible to electromagnetic interference, so that the control behavior of the electric machine can be improved.
  • the solution according to the invention is not only suitable for those applications in which the rotor is an internal rotor, in which the lamella or rotor lamination packages are mounted on the outer circumference of the rotor hub, but in the same way also for rotors in the form of external rotors, in which the lamellae - or rotor laminated cores are mounted on the inner circumference of the rotor hub.
  • a preferred embodiment of the invention provides that the rotor hub consists of a fiber-reinforced composite material, which consists of a matrix of a curable plastic and embedded in the matrix, serving for reinforcement fibers.
  • the curable resin is preferably a thermosetting plastic such as epoxy resin (EP) or phenol-formaldehyde resin (PF), but may also be a thermoplastic such as polyetheretherketone (PEEK), polyphenylene sulfide (PPS) or polyetherimide (PEI), while the fibers embedded in the matrix are advantageously glass fibers, carbon fibers or aramid fibers.
  • a thermosetting plastic such as epoxy resin (EP) or phenol-formaldehyde resin (PF)
  • PF phenol-formaldehyde resin
  • PEEK polyetheretherketone
  • PPS polyphenylene sulfide
  • PEI polyetherimide
  • the fibers are expediently introduced into the liquid matrix in the form of fiber strands, fiber webs or fiber webs by means of a winding or hand lamination method, before they are subsequently cured in a heating furnace.
  • preimpregnated semifinished products may be used, which consist of a liquid plastic-impregnated non-woven fabric or fiber fabric, which is wound around a mandrel or placed on the mandrel and then cured.
  • Tissue tapes introduce metallic stiffeners or fasteners for threaded joints into the fiber-reinforced liquid resin by placing these elements between adjacent layers of the composite material during manufacture of the rotor hub.
  • the lamella or rotor laminations and / or for the rotor shaft which are embedded during manufacture of the rotor hub in the composite material of the rotor hub and thereby either firmly connected to the rotor hub or at least brought into positive engagement with the rotor hub, so that after the curing of the composite material only needs a rotatable connection between the composite material of the rotor hub and the lamellae or rotor laminations or the rotor shaft needs to be made.
  • the fibers can be added to the plastic and the mixture can be brought by injection molding in the desired shape for the rotor hub.
  • a rotationally fixed connection between the components can be prepared by providing openings or openings in the rotor shaft or in the lamella or rotor lamination packages, which are filled with plastic during injection molding.
  • Fig. 1 a schematic longitudinal sectional view of a rotor of a large electric machine
  • FIG. 2 is a perspective view of a sector part of a first embodiment of a non-metallic rotor hub of the rotor;
  • FIG. 3 is a perspective view of another embodiment of a non-metallic rotor hub
  • FIG. 4 shows a further perspective view of the rotor hub from FIG. 3;
  • FIG. 5 shows a perspective view of a metal insert used for connecting the rotor hub to an intermediate shaft flange of the rotor shaft
  • Fig. 6 is a cutaway perspective view of a portion of the rotor hub, the metal insert and the intermediate shaft flange of the rotor shaft;
  • Fig. 7 is a simplified view of the rotor hub of Fig. 3 and 4 after the attachment of the lamination or rotor lamination packages.
  • the rotor 2 of an electric machine for a hybrid drive of a motor vehicle shown schematically and simplified in FIG. 1 consists essentially of a rotor shaft 4, a cup-shaped rotor hub 6 rotatably connected to the rotor shaft 4, and a plurality of adjacent to each other on the outer circumference Rotor hub 6 mounted lamellae or rotor laminations 8, which are arranged after assembly of the rotor 2 in the housing of the electric machine opposite to a stationary stator 10 and separated by an air gap 12 from the stator 10.
  • the rotor shaft 4 produced by machining from steel has a plurality of shaft sections 14, 16, 18 whose outer diameters, starting from the shaft section 14 serving to receive a rotor bearing (not shown), increase in the direction of a disk-shaped intermediate shaft flange 20 at the free front end of the rotor shaft 4.
  • the rotor hub 6 made of a fiber-reinforced composite material consists essentially of an annular end or bottom wall part 22 and an integrally connected with the end or bottom wall part, in the substantially wood cylindrical peripheral wall portion 24.
  • the fiber-reinforced composite material used for their preparation consists of a matrix of a thermosetting or thermoplastic plastic which has high impact resistance and good vibration damping properties, as well as short fibers, for example carbon fibers, contained in the matrix.
  • the manufacture of the rotor hub 6 is preferably carried out by a winding method or a hand lamination method, while using a thermoplastic such as Polyphenylene sulfide (PPS), preferably an injection molding is used.
  • a thermoplastic such as Polyphenylene sulfide (PPS)
  • PPS Polyphenylene sulfide
  • the lamellae or rotor lamination packages 8 are each of annular design, with each lamination or rotor lamination stack 8 consisting of a plurality of identical, stacked thin laminations, which are rigidly connected to the two adjacent laminations by stamping, for example, around the laminations or rotor laminations 8 together.
  • the lamellae or rotor lamination packages 8 contain receiving grooves (not shown) distributed around the circumference of the rotor 2 into which either parts of a rotor winding or permanent magnets are inserted after completion of the rotor 2, depending on the respective type of electrical machine.
  • the lamellae or rotor laminations 8 In order to connect the lamellae or rotor laminations 8 in the production of the rotor hub 6 positively and rotationally fixed to the hub 6, in the embodiment shown in Fig. 2, the lamellae or rotor laminations 8 embedded in the peripheral wall portion 24, so that they are a bit far protrude beyond the outer peripheral surface 26, as shown in Fig. 1.
  • the lamellae or rotor lamination 8 are provided at their inner periphery with axial, open at both ends bores (not shown), in the molding of the rotor hub 6 of the liquid Composite penetrates. After completion of the hub 6, the bores are filled with the cured cylindrical composite material 28, as shown in Fig. 2, so that the lamellae or rotor laminations 8 form a composite with the hub 6.
  • the rotor hub 6 in the embodiment shown in Figures 3 to 6 on the outer circumference axial, open in the radial direction grooves 30.
  • These grooves serve to receive feather-key-like teeth 32 which protrude beyond the inner periphery of the lamella or rotor lamination packages 8 and positively engage in the grooves 30, as shown in Fig. 7.
  • the number of these grooves 30 is determined according to the respective torque requirement, wherein their cross-sectional shape and the complementary cross-sectional shape of the teeth 32 may be eg also dovetail-shaped or otherwise undercut.
  • a plurality of metal inserts 34 are embedded during the molding of the hub 6 into the end wall or bottom wall part 34, for receiving fastening screws 36 for frictional connection of the end or bottom wall part 22 of the hub 6 to the intermediate shaft flange 20 serve.
  • the metal inserts 34 each have a cylindrical bore 40 which is provided with a corresponding
  • the metal inserts 34 are provided with radially projecting teeth 46 separated by grooves 44, which are embedded in a form-fitting manner in the material of the end or bottom wall part 22, as best shown in FIG.
  • a radially extending beyond the teeth 46 annular collar 48 is provided, which projects after the completion of the hub 6 axially beyond the end face 38 of the end or bottom wall portion 22 and as a contact surface for a nut 50 (FIG. for tightening the associated fastening screw 36 is used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un rotor (2) pour machine électrique, comprenant un arbre de rotor (4), un moyeu de rotor (6) lié, solidaire en rotation avec l'arbre de rotor (4), et au moins un empilage de lamelles ou de tôles de rotor (8) monté sur le moyeu de rotor, équipé d'un enroulement de rotor, d'aimants permanents, ou d'une cage en court-circuit. L'invention concerne en outre une machine électrique présentant un tel rotor (2). L'invention est caractérisée en ce que le moyeu de rotor (6) est fabriqué, au moins en majeure partie, en un matériau non métallique.
PCT/EP2008/062365 2007-10-05 2008-09-17 Rotor pour machine électrique, et machine électrique correspondante WO2009047094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007047715.7 2007-10-05
DE102007047715A DE102007047715A1 (de) 2007-10-05 2007-10-05 Rotor, für eine elektrische Maschine sowie elektrische Maschine

Publications (1)

Publication Number Publication Date
WO2009047094A1 true WO2009047094A1 (fr) 2009-04-16

Family

ID=40219242

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/062365 WO2009047094A1 (fr) 2007-10-05 2008-09-17 Rotor pour machine électrique, et machine électrique correspondante

Country Status (2)

Country Link
DE (1) DE102007047715A1 (fr)
WO (1) WO2009047094A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008050802A1 (de) * 2008-10-08 2010-04-15 Pro Diskus Ag Verfahren und Vorrichtung zur Herstellung eines Rotors für eine elektrische Maschine sowie Verwendung desselben
DE102010028872A1 (de) * 2010-05-11 2011-11-17 Siemens Aktiengesellschaft Antriebsvorrichtung für Dreh- und Linearbewegungen mit entkoppelten Trägheiten
EP2819274A1 (fr) 2013-06-28 2014-12-31 HILTI Aktiengesellschaft Paquet rotorique déplaçable
DE102013221643B4 (de) * 2013-10-24 2023-09-07 Zf Friedrichshafen Ag Rotor einer elektrischen Maschine
EP2940832A1 (fr) 2014-04-29 2015-11-04 HILTI Aktiengesellschaft Rotor ayant une portion où l'extension circomférentielle des épanouissements polaires est réduite
DE102014110439A1 (de) * 2014-07-24 2016-01-28 Thyssenkrupp Presta Teccenter Ag Rotor für einen Elektromotor
DE102021003241A1 (de) * 2020-07-24 2022-01-27 Sew-Eurodrive Gmbh & Co Kg Elektromotor mit einem Rotor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2018808A1 (de) * 1970-04-20 1971-11-04 Bosch Gmbh Robert Rotor für flachbauende elektrische Kleinmotoren
DE3329999A1 (de) * 1983-08-19 1985-03-07 Gebr. Märklin & Cie GmbH, 7320 Göppingen Rotor fuer spielzeug-elektromotoren
DE3830966C1 (fr) * 1988-09-12 1989-05-11 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De
DE3842800A1 (de) * 1988-12-20 1990-06-21 Vdo Schindling Fuer einen gleichstrommotor ausgebildeter rotor
DE4442869A1 (de) * 1994-12-02 1996-06-13 Fichtel & Sachs Ag Läufer für eine elektrische Maschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5915465B2 (ja) * 1978-06-16 1984-04-10 株式会社日立製作所 信号発生用石発電機及びその製造方法
DE19951594A1 (de) * 1999-10-27 2001-05-03 Bosch Gmbh Robert Rotor für einen Elektromotor
JP2003189519A (ja) * 2001-12-14 2003-07-04 Toshiba Corp 電動機の回転子
TWI314184B (en) * 2005-03-18 2009-09-01 Delta Electronics Inc Fan case
DE202005019162U1 (de) * 2005-12-07 2006-04-27 Super Electronics Co., Ltd. Bürstenloser Außenrotor-Gleichstrommotor mit einem innendurchmesserorientierten ringförmigen Ferromagnet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2018808A1 (de) * 1970-04-20 1971-11-04 Bosch Gmbh Robert Rotor für flachbauende elektrische Kleinmotoren
DE3329999A1 (de) * 1983-08-19 1985-03-07 Gebr. Märklin & Cie GmbH, 7320 Göppingen Rotor fuer spielzeug-elektromotoren
DE3830966C1 (fr) * 1988-09-12 1989-05-11 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De
DE3842800A1 (de) * 1988-12-20 1990-06-21 Vdo Schindling Fuer einen gleichstrommotor ausgebildeter rotor
DE4442869A1 (de) * 1994-12-02 1996-06-13 Fichtel & Sachs Ag Läufer für eine elektrische Maschine

Also Published As

Publication number Publication date
DE102007047715A1 (de) 2009-04-09

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