WO2011088862A1 - Rotor d'une machine électrique et procédé de fabrication du rotor d'une machine électrique - Google Patents

Rotor d'une machine électrique et procédé de fabrication du rotor d'une machine électrique Download PDF

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Publication number
WO2011088862A1
WO2011088862A1 PCT/EP2010/007127 EP2010007127W WO2011088862A1 WO 2011088862 A1 WO2011088862 A1 WO 2011088862A1 EP 2010007127 W EP2010007127 W EP 2010007127W WO 2011088862 A1 WO2011088862 A1 WO 2011088862A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
individual segments
rotor carrier
carrier
individual
Prior art date
Application number
PCT/EP2010/007127
Other languages
German (de)
English (en)
Inventor
Tobias Buban
Hans-Peter Merten
Michael GRÜNER
Original Assignee
Daimler Ag
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 Daimler Ag filed Critical Daimler Ag
Publication of WO2011088862A1 publication Critical patent/WO2011088862A1/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]
    • 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

Definitions

  • the invention relates to a rotor of an electric machine according to the preamble of claim 1.
  • the generic document EP 0786854 B1 describes a rotor of an electrical machine, which is formed from a rotor carrier and on the rotor carrier radially outer permanent magnets.
  • the rotor carrier is designed as a laminated core, which forms an axial length of the rotor carrier by joining several layers of laminations.
  • the permanent magnets are not fixed directly on the rotor carrier, but are glued to the outside on a separate laminated core, wherein the laminated core itself is positively connected to the rotor carrier.
  • the object is achieved by a rotor of an electrical machine with the features of claim 1.
  • the rotor has a rotor carrier and individual segments, wherein the individual segments have a recess for receiving a permanent magnet and
  • each individual segment is formed from a laminated core.
  • the laminated core can be easily assembled from sheet metal layers, which are made by punching from a sheet metal strip.
  • Preferred direction of the sheet metal strip determined. With the same magnetic properties of all individual segments results in a symmetrical arrangement in the rotor ring and a symmetrical magnetic flux.
  • the rotor is so easy and cheap to produce, since only one form of
  • Single segments must be produced in large numbers and the arrangement of the individual segments in the rotor interchangeable and thus the order is freely selectable.
  • the rotor carrier is star-shaped
  • the rotor carrier has radiation-like training, which extend radially outward.
  • the jets of the rotor carrier are shaped such that the jets fix the individual segments in a form-fitting manner on the rotor carrier.
  • a star-shaped embodiment of the rotor carrier represents a simple rotationally symmetrical shape, in which each individual element is fixed in a form-fitting radially outward manner via a radiation-like further development.
  • the rotor carrier has a first connecting element, a second connecting element and a holding element.
  • the individual segments are arranged in the axial direction between the first connecting element and the second connecting element.
  • the holding element connects the first connecting element and the second connecting element to one another and is arranged in a recess of the individual segments.
  • the holding element of the rotor carrier fixes positively the single segment with the rotor carrier.
  • the individual segments form a rotor ring, at the ends of which connect the connecting elements in the axial direction.
  • the Connecting elements extend radially from within the individual segments to the holding element, which is arranged in the recess of the individual segments.
  • the connecting element can extend radially over the entire individual segment.
  • the connecting element is formed such that at the same time all holding elements of the rotor carrier are connected to this connecting element.
  • This shape can be formed by the shape of a ring or a star shape, each with a beam to a respective holding element.
  • the connecting element is, for example, shaped such that it contains a recess for receiving a shaft.
  • the connecting element thus represents a connection of the holding elements with the shaft for power transmission.
  • the rotor carrier is designed as a deep-drawn part.
  • the rotor carrier transmits the rotation of the rotor and thus the torque to the shaft. Due to the contact area between the individual segments, the magnetic flux flows through the individual segments and is determined by their magnetic properties. Due to the rotor carrier, no magnetic flux takes place and thus the production of the rotor carrier is determined only by the mechanical properties. The simple form of the rotor carrier can therefore be made low as a deep-drawn part.
  • the production as a casting is easy and inexpensive.
  • Single segments has, the individual segments are arranged in the form of a rotor ring and the rotor carrier is cast around the composite individual segments.
  • the individual segments are embedded and fixed in the rotor carrier after casting.
  • the rotor carrier does not include any magnetic flux due to the segmentation of the rotor, the rotor carrier can also be produced as a cast part. Without the method according to the invention, the rotor would still have to be assembled from the individual segments and the rotor carrier, wherein each individual segment would have to be fixed on the previously cast rotor carrier, which represents further working steps in production. In addition, a high production accuracy must be maintained, so that the
  • Single segments can be mounted on the rotor arm.
  • the individual segments are already inserted into the shape of the rotor carrier during casting of the rotor carrier, the individual segments are embedded in the rotor carrier during casting and further assembly steps are omitted.
  • the individual segments must already be assembled in their final form of a rotor ring, since the position of the individual elements after casting with the rotor carrier can not be changed.
  • the casting material of the rotor carrier also resembles small ones
  • Fig. 1 is an axial view of a portion of a rotor and a stator of an electric machine, wherein the rotor has individual segments and a star-shaped rotor carrier
  • Fig. 2 is an oblique view of a rotor of an electric machine, over
  • FIG. 3 shows an axial view of a section of the rotor shown in FIG. 2.
  • FIG. 4 shows an axial view of a section of a rotor and a stator of an electrical machine, wherein the rotor has individual segments which are in a rotor carrier are cast.
  • Figure 1 shows an axial view of a portion of a rotor 1a and a stator 12 of an electric machine.
  • the electric machine is designed as an internal rotor so that the rotor 1a is arranged inside the stator 12.
  • the rotor 1 a has individual segments 2 a, 2 b and a rotor carrier 3 a, which connects radially inward to the individual segments 2 a, 2 b.
  • the individual segments 2a, 2b contain a recess 4 which serves to receive a permanent magnet 14.
  • the recess 4 is arranged in the radial direction within the individual segment 2a, 2b and can be equipped with the permanent magnet 14 through an opening in the axial direction.
  • the individual segments 2a, 2b form a rotor ring and the individual segment 2a has a contact surface 5 with the adjacent individual segment 2b.
  • the contact surface 5 of the magnetic flux flows, so that the contact surface 5 is arranged at the location of the magnetic flux.
  • the individual segments 2a, 2b are designed as Blechpakte and have a same shape. Due to the design as laminated cores, the individual segments 2a, 2b have the same magnetic properties with the same magnetic preferred direction. Thus, the rotationally symmetrical rotor 1a also has symmetrical magnetic
  • the rotor carrier 3a is designed in a star shape, so that the rotor carrier 3a has jets 6 which connect the individual segments 2a, 2b in a form-fitting manner to the rotor carrier 3a.
  • the jets 6 extend radially outwards from an annular base body of the rotor carrier. At the end, the rays 6 bulge 7, which form a positive fit with recesses 8a of the individual segments 2a, 2b.
  • the individual segments 2a, 2b can be mounted by insertion in the axial direction with the rotor carrier 3a or can be embedded directly in a cast rotor carrier 3a.
  • the recess 8a of the individual segment 2a, 2b is arranged radially further inward than the recess 4 for receiving the permanent magnet 14.
  • the position of the recess 8a is tuned to the magnetic flux and can be arranged anywhere within the individual segment 2a, 2b. Due to the position of the recess 8a and position of the bulge 7 is determined and thus the required length of the rays. 6
  • the rotor carrier 3a is shown with a large inner diameter, wherein a star-shaped rotor carrier without inner diameter, the same functions and
  • FIG. 2 shows an oblique view of a rotor 1b, which has individual segments 2c, 2d and a rotor carrier 3b.
  • the rotor carrier 3b has a first
  • the first connecting element 9 and the second connecting element 10 are arranged in the axial direction at the ends of the rotor 1.
  • Connecting element 9 and the second connecting element 10 is arranged and is bordered by the connecting elements 9,10.
  • the first connecting element 9 and the second connecting element 10 have a same shape and are formed in a ring shape.
  • the inner radius of the ring shape of the connecting element 9, 10 is smaller than the inner radius of the rotor ring, which is formed from the individual segments 2.
  • the Connecting elements 9,10 extend in the radial direction so far that the
  • Holding element 11 is covered.
  • the recess 8b of the single segment 2c, 2d is arranged on the outer surface in the radial direction.
  • the holding element 11 is arranged in the recess 8b. The radial position of the
  • Holding element 11 corresponds to the outer radius of the rotor ring and the
  • the holding element 11 is arranged in the recess 8b of the individual segment 2c, 2d and connects the first connecting element 9 and the second connecting element 10 to one another.
  • the holding element 1 1 and the connecting elements 9, 10 can be
  • the holding element 11 connects the single element 2c, 2d with the rotor carrier 3b in a form-fitting manner. Due to the inner circle of the ring shape of the
  • Connecting elements 9,10, the rotor 1 b may be fixed on a shaft with a corresponding outer diameter.
  • the connecting elements 9, 10 can have a plurality of recesses such that a ring shape is no longer present, as long as all the retaining elements 11 remain mechanically connected to each other and to a shaft. This would be synonymous with a
  • Holding element 11 fulfill this task.
  • FIG. 3 shows an axial section analogous to FIG. 1 through an electric machine with an inner rotor, which incorporates the configuration of the rotor carrier from FIG.
  • the same or equivalent components which have already been described in FIG. 1 are adopted for this illustration and are not explicitly listed again.
  • the individual segments 2c, 2d form a rotor ring and the single segment 2c has a contact surface 5 with the adjacent individual segment 2d.
  • the first connecting element 9 and the second connecting element 10, over which the rotor carrier has is not included in this view.
  • the holding element 11 is shown and the arrangement of the holding element 11 in a recess 8b of the single segment 2c, 2d.
  • Holding element 11 is fixed in a form-fitting manner, with the recess 8b of the individual element 2c, 2d, the individual element 2c, 2d in the rotor carrier 3b.
  • FIG. 4 shows an axial section analogous to FIG. 1 through an electric machine with an inner rotor, which has a rotor 1c and a stator 12.
  • the rotor 1c has individual segments 2e, 2f and a rotor carrier 3c, which adjoins the individual segments 2e, 2f radially inward.
  • the individual segments 2e, 2f have a recess 4 which serves to receive a permanent magnet 14 and a recess 8c which positively connects the individual segment 2e, 2f to the rotor support 3c.
  • the rotor carrier 3c is made of cast material, which is poured around the individual segments 2e, 2f assembled to form a rotor ring. The rotor carrier 3c fills the recess 8c and the intermediate spaces 13 between the individual segments 2e, 2f and thus embeds the individual segments 2e, 2f in a form-fitting manner.
  • the rotor carrier takes 3c by the shape of
  • Spaces 13 a star shape.
  • the recess 8c is arranged on the outer surface in the radial direction of the individual segment 2e, 2f, and so the rays extend to the outer radius of the individual segments 2e, 2f.
  • the single segment 2e is separated from the single segment 2f by a jet of the rotor carrier 3c. Production inaccuracies of the individual segments 2e, 2f are thus compensated by the casting material of the rotor carrier 3c.
  • the individual segments can be easily and inexpensively manufactured.
  • Rotor carrier 3c fall further assembly steps of the rotor 1c away.
  • the rotor carrier 3a from FIG. 1 and the rotor carrier 3b from FIG. 3 can likewise be produced by pouring the individual segments 2a, 2b, 2c, 2d.
  • the resulting shape of a rotor carrier is determined by the shape of recesses of the single segment 2a, 2b, 2c, 2d.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne un rotor (1) d'une machine électrique, comprenant des segments individuels (2a, 2b) et un support de rotor (3a). Les segments individuels (2a, 2b) sont assemblés sur le support de rotor (3a) par complémentarité de forme. Un premier segment individuel (2a) et un deuxième segment individuel (2b) adjacent, dans l'état de montage du rotor, possèdent une surface de contact (5) commune. Grâce à cette surface de contact (5), le flux magnétique pénètre dans le rotor (1), si bien que le support de rotor (3a) peut être construit sans tenir compte de ses propriétés magnétiques.
PCT/EP2010/007127 2010-01-23 2010-11-24 Rotor d'une machine électrique et procédé de fabrication du rotor d'une machine électrique WO2011088862A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010005490 DE102010005490A1 (de) 2010-01-23 2010-01-23 Rotor einer elektrischen Maschine und Verfahren zur Herstellung eines Rotors einer elektrischen Maschine
DE102010005490.9 2010-01-23

Publications (1)

Publication Number Publication Date
WO2011088862A1 true WO2011088862A1 (fr) 2011-07-28

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Application Number Title Priority Date Filing Date
PCT/EP2010/007127 WO2011088862A1 (fr) 2010-01-23 2010-11-24 Rotor d'une machine électrique et procédé de fabrication du rotor d'une machine électrique

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DE (1) DE102010005490A1 (fr)
WO (1) WO2011088862A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015206974A1 (de) 2015-04-17 2016-04-07 Magna powertrain gmbh & co kg Rotor für eine elektrische Maschine
DE102015225523A1 (de) 2015-12-17 2017-06-22 Em-Motive Gmbh Rotor einer elektrischen Maschine
DE102019123434A1 (de) 2019-09-02 2021-03-04 Schaeffler Technologies AG & Co. KG Blechring für ein Rotorblechpaket eines Rotors einer elektrischen Maschine und Verfahren zur Herstellung eines Rotorblechpakets aus mehreren Blechringen
DE102019123433A1 (de) 2019-09-02 2021-03-04 Schaeffler Technologies AG & Co. KG Rotorblechpaket für einen Rotor und Verfahren zur Herstellung eines Rotorblechpakets

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0786854B1 (fr) 1994-10-14 1999-06-16 Honda Giken Kogyo Kabushiki Kaisha Rotor pour machine rotative, son procede de fabrication et unite a aimant
US20020089251A1 (en) * 1998-09-28 2002-07-11 Hitachi, Ltd. Rotary electric machine and electric vehicle using the same
JP2002262496A (ja) * 2001-03-05 2002-09-13 Hitachi Ltd 回転電機のコア構造
JP2005210790A (ja) * 2004-01-21 2005-08-04 Honda Motor Co Ltd 回転電機
US20060119204A1 (en) * 2004-11-25 2006-06-08 Kabushiki Kaisha Toshiba Permanent magnet motor and washing machine provided therewith

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0786854B1 (fr) 1994-10-14 1999-06-16 Honda Giken Kogyo Kabushiki Kaisha Rotor pour machine rotative, son procede de fabrication et unite a aimant
US20020089251A1 (en) * 1998-09-28 2002-07-11 Hitachi, Ltd. Rotary electric machine and electric vehicle using the same
JP2002262496A (ja) * 2001-03-05 2002-09-13 Hitachi Ltd 回転電機のコア構造
JP2005210790A (ja) * 2004-01-21 2005-08-04 Honda Motor Co Ltd 回転電機
US20060119204A1 (en) * 2004-11-25 2006-06-08 Kabushiki Kaisha Toshiba Permanent magnet motor and washing machine provided therewith

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