WO2013053479A1 - Ensemble de tôles de rotor et procédé de fabrication - Google Patents

Ensemble de tôles de rotor et procédé de fabrication Download PDF

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Publication number
WO2013053479A1
WO2013053479A1 PCT/EP2012/004262 EP2012004262W WO2013053479A1 WO 2013053479 A1 WO2013053479 A1 WO 2013053479A1 EP 2012004262 W EP2012004262 W EP 2012004262W WO 2013053479 A1 WO2013053479 A1 WO 2013053479A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
spokes
hub
laminations
rotor plate
Prior art date
Application number
PCT/EP2012/004262
Other languages
German (de)
English (en)
Inventor
Attila Simofi-Ilyes
Maurad Berkouk
Sebastien Labat
Stefan Beetz
Original Assignee
Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg
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 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg filed Critical Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg
Publication of WO2013053479A1 publication Critical patent/WO2013053479A1/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
    • H02K1/27—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
    • H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
    • 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

Definitions

  • the present invention relates to a rotor laminated core, a rotor and a method for producing a rotor laminated core.
  • a rotating electrical machine such as an electric motor or a generator, generally consists of a stator and a rotor arranged rotatably therein.
  • a rotor typically includes a plurality of rotor laminations which are assembled into a so-called rotor lamination stack.
  • a central challenge in rotating electrical machines is the avoidance of power dissipation from eddy currents in the rotor, which arise in the support webs of the rotor core to the rotor shaft.
  • An above-mentioned rotor laminated core is described in EP 1 223 658 A1. Therein spokes-like distributed pole teeth are shown with holding webs, wherein by minimizing the volume of the holding webs is trying to minimize the formation of eddy currents in the rotor.
  • the pole teeth are connected to each other axially and connected only at every second pole tooth via a holding web with the rotor shaft.
  • the pole teeth not connected to the rotor shaft are present as individual parts prior to assembly of the rotor lamination stack.
  • Such a laminated rotor core thus contains substantially more components than a conventional rotor laminated core for a brushless synchronous machine, in which a plurality of pole teeth and retaining webs together form a part. The production is at
  • the present invention has the object to provide an improved electrical machine with reduced power dissipation from eddy currents available.
  • this object is achieved by an assembly with the features of claim 1 and / or by a rotor having the features of claim 13 and / or by a method having the features of claim 15.
  • a rotor core for a rotary electric machine, in particular for a brushless synchronous motor, with a plurality of flat rotor laminations wherein a rotor plate has a hub with a hub axis and at least two radially distributed evenly around the hub axis spokes, wherein a rotor plate formed flat in the region of the hub is, wherein the rotor laminations are arranged in pairs, the hubs are on a common hub axle, the spokes of a rotor plate pair evenly distributed with respect to the common hub axis and staggered to each other and a first rotor plate of a pair with respect to a second rotor plate of the same pair rotated by 180 ° around a Axis is aligned perpendicular to the hub axle. Variety of permanent magnets, which are arranged in recesses provided between the spokes of the rotor laminated core.
  • a method of manufacturing an electrical machine, in particular a rotor lamination stack for the rotor of a brushless synchronous machine comprising the steps of: providing electrical laminations; Generating the contour of rotor laminations from the electrical laminations having at least two spokes and a hub; Reducing the sheet thickness of the rotor laminations in the region of the hub by cold forming, preferably by 50%; Aligning a first rotor plate with its hub axis on a defined axis, wherein the position of the spokes is also defined; Aligning a second rotor lamination with its hub axle on the same defined axis such that the hub axle of the second rotor lamination is identical to the hub axle of the first rotor lamination; Rotary displacement of the second rotor plate to the first rotor plate with respect to the hub axis, in particular such that the spokes of the second rotor plate are equidistant between the spokes of the first rotor plate; Rotating the second rotor blade
  • the idea underlying the present invention is to provide rotor laminations with a reshaped hub. This enables a rotatably offset arrangement of two adjacent rotor laminations around the hub axis and by turning one of the two rotor laminations together usable, alternating spoke arrangement of the two rotor laminations. Therein, two adjacent spokes are always associated with different rotor laminations. In addition, a comparison with a single sheet equal density packing of the rotor plates is possible.
  • the generation of eddy currents in a rotor can be significantly reduced.
  • the reason for this is that the magnetic poles of a rotor are separated with the rotor laminated core according to the invention on different rotor laminations.
  • the rotor laminated core can be easily mounted, since only a single assembly step for mounting on a rotor shaft is necessary for a rotor plate prepared according to the invention.
  • the pre-processing can largely be done mechanically and / or automatically.
  • the rotor laminations are reshaped in the region of the hub in such a way that the sheet thickness in the area of the hub is at least reduced compared with the sheet thickness of the spokes, in particular at least 40% to 60% and preferably at least 50% reduced.
  • one side of the rotor laminations is preferably formed flat.
  • the region of the hub can be understood as the region in which overlapping rotor laminations overlap one another. However, it is not limited to this and may also extend to parts of the spokes, in particular especially at those points where the spokes are connected to the hub.
  • thin sections, so-called holding webs may be provided on the rotor laminations between the hub and the spoke.
  • Sheet thickness is reduced, can also such holding webs
  • electrical steel is used for the rotor laminations.
  • the rotor laminations in the area of the hub are formed by cold forming.
  • the electric sheet has an austenitic structure in its initial state.
  • An uneven martensitic structure in the area of the hub is created by the cold forming of the rotor plate.
  • a structural change due to cold forming in the area of the rotor blade hubs in an irregular martensitic structure thus increases the efficiency of an electric motor.
  • the spokes of a pair are arranged such that each spoke of the first rotor lamination between two spokes of the second rotor lamination is such that the spokes of the first and second rotor lamination do not overlap one another and between a spoke of the first rotor lamination and two spokes of the second rotor lamination preferably an equal distance is present.
  • This arrangement in a pair corresponds in plan view of a star-shaped arrangement in which completely cover the hubs of the two rotor laminations, and each of the Spokes of the two rotor laminations individually completely visible.
  • the spokes of the first and / or the second rotor plate have an edge, which preferably terminates with the contour of a circular arc. The arcuate edges of the individual spokes are preferred at their ends
  • spokes may be formed such that they have a width at the edge, which is around a
  • the spacing between the spokes is typically provided for receiving permanent magnets.
  • the spokes have fastening devices with which a respective permanent magnet is held between a spoke of the first rotor plate and an adjacent spoke of the second rotor plate.
  • a parallelepiped permanent magnet may be interposed and secured between the spokes.
  • the shape of the first rotor plate and the shape of the second rotor plate are identical.
  • the production and assembly of the rotor laminations can be greatly simplified.
  • all rotor laminations can be produced with the same tools.
  • a uniform storage of semi-finished products is possible and it is only during assembly a single supply for the rotor laminations necessary. Overall, this makes it possible to produce the corresponding rotor laminations cheaper.
  • the first and the second rotor laminations each have a hub with an annular contour and / or are in surface contact with each other exclusively in the region of the hubs. This makes it possible for the rotor laminations to be packed and / or pressed as close as possible within the rotor laminations.
  • the annular contour ensures a uniform distribution of the surface pressure within the surface contact points. The surface pressure can be applied for example by a shaft nut.
  • the first and the second rotor plate each contain at least three and in particular five spokes arranged radially around the hub.
  • a rotor plate design is referred to as Spoke design.
  • a high number of spokes of the rotor laminations leads to an increasingly homogeneous mass distribution in the rotor laminated core.
  • a higher number of spokes a higher number of positions for receiving permanent magnets can be provided.
  • a spoke design with five spokes per rotor plate leads to the fact that the rotor laminated core is provided for accommodating ten permanent magnets.
  • the spokes can have uniform recesses.
  • an anti-rotation device is provided in the hub, which is designed such that the rotor laminations are mounted against rotation on a rotor shaft.
  • An anti-rotation device can be designed as an interference fit, as a groove with a spring, as a splined shaft, as a polygonal shaft or in any other non-positive, positive, cohesive or preloaded manner for generating a shaft-hub connection.
  • a rotationally secure connection ensures on the one hand a defined radial alignment of the rotor laminations. On the other hand, it serves to transmit power from the rotor plate to a rotor shaft.
  • a number of uniformly spaced teeth are provided for preventing rotation in the hub radially to the hub axis, the z. B. equal to an even multiple of the number of spokes. These teeth are also used for exact alignment of the rotor laminations to each other.
  • the first rotor plate and the second rotor plate are arranged offset by a number of teeth to each other about the hub axis rotationally equal to half the ratio of the number of teeth and number of spokes.
  • a number of teeth which corresponds to twice the number of spokes of the rotor lamination, are contained in a hub of a rotor lamination.
  • the first rotor plate is arranged to the second rotor plate with respect to the hub axis rotationally offset by one tooth.
  • the spokes of the first rotor plate and the spokes of the second rotor plate together form a common plane. This is special ders advantageous if the sum of the sheet thicknesses at the hubs of the first and the second rotor plate equal to the
  • Sheet thickness on a spoke and / or an electrical sheet from which the rotor laminations are manufacturable is.
  • both hubs have the same thickness, which is preferably half the thickness of a spoke
  • This sheet thickness of a spoke can advantageously be in the range from 0.1 mm to 5 mm, in particular from 0.3 mm to 0.8 mm and preferably from 0.4 mm to 0.6 mm.
  • At least one permanent magnet is attached between spokes of first rotor laminations and adjacent spokes of second rotor laminations of the rotor laminations.
  • Like poles of the Perma ⁇ nentmagnete are each secured with spokes first rotor laminations or with spokes second rotor laminations.
  • the magnetic poles are not connected via such a rotor via a rotor plate, but are present separately on different rotor laminations.
  • the magnetic field is favorably influenced in its course to avoid eddy currents in the rotor, since the connection possibilities between the north and south poles of the permanent magnets are significantly reduced. If the rotor laminations are also cold-formed in the region of the hub, this additionally leads to a reduction in the magnetic field strength in the region of the hub.
  • a constructively and metallurgically optimized with respect to the magnetic flux rotor is thus provided according to the invention. This can at least reduce unwanted eddy currents in the rotor, which increases the efficiency of a synchronous motor with such a rotor.
  • Fig. 1 shows an inventive arrangement of
  • FIG. 2 shows a single rotor plate from FIG. 1 in the representation
  • FIG. 3 shows a rotor laminated core according to the invention
  • FIG. 4A is a sectional view of the hub portion of the rotor lamination stack
  • Fig. 5 is a plan view of a rotor with
  • Fig. 6 shows a preferred magnet arrangement in the rotor
  • Fig. 7 is an exploded view of the invention
  • FIG. 1 shows an arrangement according to the invention of rotor laminations of a rotor lamination package, which is not completely shown here.
  • a rotor core 1 has a plurality of rotor laminations 4, 5, only two of which are shown here. These rotor laminations 4, 5 have a same shape.
  • Figure 2 shows a single rotor plate 4, 5 in the detail view.
  • a rotor plate 4, 5 each contains five spokes 7 and a hub 6.
  • the spokes 7 have edges 12 with rounded edges 13 and holding lugs 15.
  • the thickness tl of the spokes 7 is greater than the thickness t2 of the hub 6.
  • the width bl; b2 of the spokes 7 is significantly larger at the edge 12 of the spokes 7 than in the region of the connection of the spokes 7 to the hub 6. In this area, a short section of the spokes 7 is formed with the smallest width bl of the spokes 7 constant. Within this area, the transition from the
  • the spoke edges 12 each describe the shape of a circular arc segment and are rounded at their end edges 13 in the circumferential direction. Together, the circular arc segments of the individual spokes 7 describe approximately an interrupted circular arc 14. In the vicinity of the edges 12 retaining lugs 15 are provided.
  • the hub 6 is annular and has at the inner edge ten regularly arranged teeth 9. These are as anti-rotation and adjustment aid for the rotor laminations 4; 5 is provided which can be brought into engagement with a corresponding counterpart on a rotor shaft.
  • the two rotor laminations 4, 5 are arranged offset from each other about their common hub axis 3 by one tooth, that is to say by one-tenth revolution.
  • the upper rotor plate 4 is rotated relative to the lower rotor plate 5 by a radially extending to the hub axis 3 transverse axis 8 by 180 °, that is oriented once turned.
  • FIG. 3 shows a complete rotor core 1 according to the invention.
  • first and second rotor laminations 4; 5 wherein first and second rotor laminations each have a same orientation with respect to the hub axis.
  • Aligned spokes 7 of the first or second rotor laminations 4; 5 overlap in the axial direction of the hub axle.
  • Recesses 18 are provided between the spokes. At the hubs 6 all rotor laminations 4 overlap; 5 of the rotor core 1.
  • FIG. 4 shows the hub region of the rotor laminated core 1 in a detailed view. Therein, the stacking sequence can be seen in the hub region, according to which invention the first and second rotor laminations 4; 5 pairs to each other and offset are arranged reversed, wherein first and second rotor laminations 4; 5 are each aligned the same.
  • FIG. 4A shows a section of a sectional illustration through this hub region of the rotor lamination packet 1.
  • First rotor laminations 4 are shown therein in section through the hub 6 and through a spoke 7.
  • Second rotor laminations 5 are shown only in section through the hub 6.
  • the sheet thickness tl of the spoke 7 corresponds to twice the sheet thickness of the individual hubs 6 of both rotor laminations 4, 5, whereby a gap-free stacking of the rotor laminations 4, 5 is made possible.
  • FIG. 5 shows a plan view of a rotor 17 with a rotor core 1 according to the invention.
  • FIG. 6 shows a preferred magnet arrangement in the rotor 17.
  • In the center of the hub 6 is a rotor shaft 2.
  • a spring 10 is arranged.
  • the rotor laminations 4, 5 are arranged on the rotor shaft 2 offset by a tooth about the hub axis analogously to FIG.
  • the teeth 9 of the hubs 6 of the rotor laminations 4; 5 stand with a spring 10 to prevent rotation and alignment of the rotor laminations 4; 5 engaged.
  • the permanent magnets 16 are always fastened with their south pole S to a spoke 7 of the first rotor plate 4 and with their north pole N to a spoke 7 of the second rotor plate 5.
  • a first rotor plate 4 is thus exclusively with south poles S and a second rotor plate.
  • Sheet 5 exclusively connected to north poles N of the permanent magnets 16.
  • the magnetic poles are thus separated by sheet metal.
  • the permanent magnets are formed as a cuboid body with a width D, the distance between two adjacent spokes 7 of a first and second rotor plate 4; 5 corresponds.
  • the magnets 16 are held in the radial direction by the retaining lugs 15 and in the circumferential direction by the side surfaces of the spokes 7.
  • the pole boundary of the permanent magnets 16 extends in the radial direction in the center through its cuboid geometry.
  • FIG. 7 shows an exploded view of a rotor 17 according to the invention.
  • a multiplicity of first and second rotor laminations 4, 5, each having a hub 6 and five spokes 7, ten permanent magnets 16 and a rotor shaft 2 are illustrated isometrically.
  • the permanent magnets 16 are formed as axially through the entire rotor laminated core 1 reaching blocks.
  • First rotor laminations 4 and second rotor laminations 5 are each aligned uniformly.
  • An anti-rotation and / or shaft-hub connection and / or axial securing between the rotor core and rotor shaft and an optional axial securing the permanent magnets is not shown here for clarity.
  • Such components and / or devices are easy to supplement with the knowledge of a person skilled in the art and therefore require no further implementation at this point.
  • the spokes of the rotor laminations could run through the spokes of the rotor laminations for stabilization additional fasteners in the axial direction of the hub axle.
  • the hubs of the rotor laminations could be polygon-shaped, thus providing a defined contact surface for an end face of the permanent magnets between the spokes.
  • the rotor plate does not have to be made of electrical steel, but could also contain another ferromagnetic material on the spokes and / or another non-magnetic material on the hub. Also conceivable would be a composite material with many ferromagnetic portions in the spokes and little or no ferromagnetic portions in the hub.
  • An inventive rotor core or a rotor according to the invention could also contain only a single pair of rotor laminations with a first and a second rotor plate.
  • the rotor lamination package according to the invention can also be used on a much smaller scale, as used, for example, in microtechnology or on a much larger scale, as used, for example, in US Pat
  • Power plant technology finds application, be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un ensemble de tôles de rotor destiné en particulier à un moteur synchrone sans balais, comprenant des tôles de rotor munies d'un moyeu formé qui permet, du fait de l'agencement décalé en rotation de deux tôles de rotor adjacentes autour du moyeu et du fait de la rotation d'une des deux tôles de rotor, de produire un agencement utilisable en commun des rayons des deux tôles de rotor, deux rayons adjacents étant toujours associés à deux tôles de rotor différentes. La présente invention concerne par ailleurs un rotor et un procédé de fabrication dudit rotor. L'agencement de tôles de rotor selon l'invention permet d'augmenter l'efficacité de moteurs synchrones sans balais. De plus, l'ensemble de tôles de rotor selon l'invention comprend de nombreuses pièces identiques, le nombre de pièces étant relativement peu élevé. La fabrication et le montage de l'ensemble de tôles de rotor sont donc très économiques.
PCT/EP2012/004262 2011-10-13 2012-10-11 Ensemble de tôles de rotor et procédé de fabrication WO2013053479A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110084425 DE102011084425A1 (de) 2011-10-13 2011-10-13 Rotorblechpaket, Rotor und Verfahren zur Herstellung eines Rotorblechpakets
DE102011084425.2 2011-10-13

Publications (1)

Publication Number Publication Date
WO2013053479A1 true WO2013053479A1 (fr) 2013-04-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/004262 WO2013053479A1 (fr) 2011-10-13 2012-10-11 Ensemble de tôles de rotor et procédé de fabrication

Country Status (2)

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DE (1) DE102011084425A1 (fr)
WO (1) WO2013053479A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9136736B2 (en) 2012-06-06 2015-09-15 Nidec Motor Corporation Motor having spoked outer rotor with spaced apart pole segments
CN107222048A (zh) * 2017-07-25 2017-09-29 重集团大连工程技术有限公司 一种用于直驱风力发电机的永磁体转子
WO2018219859A1 (fr) * 2017-06-01 2018-12-06 Continental Automotive Gmbh Agencement de tôles d'induit, rotor destiné à être utilisé dans un moteur électrique équipé d'un tel agencement de tôles d'induit et moteur électrique équipé d'un tel rotor
CN113916419A (zh) * 2021-11-05 2022-01-11 中国航发沈阳发动机研究所 一种复合载荷传感器
CN113932956A (zh) * 2021-11-05 2022-01-14 中国航发沈阳发动机研究所 一种宽范围检测载荷传感器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016212004A1 (de) 2016-07-01 2018-01-04 Volkswagen Aktiengesellschaft Rotor mit Rotorschrägung für eine elektrische Maschine und Elektromotor für den Fahrantrieb eines Kraftfahrzeugs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5829120A (en) * 1993-02-15 1998-11-03 Fanuc, Ltd. Method for manufacturing a rotor for synchronous motor
EP1223658A1 (fr) 2001-01-12 2002-07-17 Siemens Aktiengesellschaft Rotor à aimant permanent avec pertes de flux réduites
DE102009001035A1 (de) * 2009-02-20 2010-08-26 Robert Bosch Gmbh Rotoranordnung für einen Elektromotor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006020406A (ja) * 2004-06-30 2006-01-19 Nidec Shibaura Corp モータのロータ
DE102008002106B4 (de) * 2008-05-30 2019-06-27 Seg Automotive Germany Gmbh Geräuschgedämpfte elektrische Maschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5829120A (en) * 1993-02-15 1998-11-03 Fanuc, Ltd. Method for manufacturing a rotor for synchronous motor
EP1223658A1 (fr) 2001-01-12 2002-07-17 Siemens Aktiengesellschaft Rotor à aimant permanent avec pertes de flux réduites
DE102009001035A1 (de) * 2009-02-20 2010-08-26 Robert Bosch Gmbh Rotoranordnung für einen Elektromotor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9136736B2 (en) 2012-06-06 2015-09-15 Nidec Motor Corporation Motor having spoked outer rotor with spaced apart pole segments
WO2018219859A1 (fr) * 2017-06-01 2018-12-06 Continental Automotive Gmbh Agencement de tôles d'induit, rotor destiné à être utilisé dans un moteur électrique équipé d'un tel agencement de tôles d'induit et moteur électrique équipé d'un tel rotor
CN107222048A (zh) * 2017-07-25 2017-09-29 重集团大连工程技术有限公司 一种用于直驱风力发电机的永磁体转子
CN107222048B (zh) * 2017-07-25 2023-08-29 一重集团大连工程技术有限公司 一种用于直驱风力发电机的永磁体转子
CN113916419A (zh) * 2021-11-05 2022-01-11 中国航发沈阳发动机研究所 一种复合载荷传感器
CN113932956A (zh) * 2021-11-05 2022-01-14 中国航发沈阳发动机研究所 一种宽范围检测载荷传感器
CN113932956B (zh) * 2021-11-05 2023-08-22 中国航发沈阳发动机研究所 一种宽范围检测载荷传感器
CN113916419B (zh) * 2021-11-05 2023-08-22 中国航发沈阳发动机研究所 一种复合载荷传感器

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