WO2016037983A1 - Procédé de fabrication d'un bloc rotor d'un moteur synchrone à excitation permanente et bloc rotor - Google Patents

Procédé de fabrication d'un bloc rotor d'un moteur synchrone à excitation permanente et bloc rotor Download PDF

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Publication number
WO2016037983A1
WO2016037983A1 PCT/EP2015/070392 EP2015070392W WO2016037983A1 WO 2016037983 A1 WO2016037983 A1 WO 2016037983A1 EP 2015070392 W EP2015070392 W EP 2015070392W WO 2016037983 A1 WO2016037983 A1 WO 2016037983A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor unit
shaft
sheet metal
metal element
permanent magnets
Prior art date
Application number
PCT/EP2015/070392
Other languages
German (de)
English (en)
Inventor
Wolfram Triller
Thomas Mann
Eugen Bernarding
Original Assignee
Continental Automotive 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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2016037983A1 publication Critical patent/WO2016037983A1/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
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • H02K15/028—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots for fastening to casing or support, respectively to shaft or hub
    • 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

Definitions

  • the present invention relates to a method for manufacturing a rotor unit of a permanent-magnet synchronous motor.
  • the invention further relates to a rotor unit.
  • the material cost share in such rotor units, in particular ⁇ for use in compact high-power BLDC motors (brushless DC motors), is very high due to the use of the required permanent magnets, which are made in particular of rare earths. It is therefore desirable in such engines to reduce the amount of magnetic material as much as possible without degrading the performance of the engine.
  • One way to do this is to embed the magnets in soft iron material. Specifically, in this case, the magnets are arranged in the form of spokes, as is customary in the "collector construction.” Soft iron cores, which guide the magnetic flux, are arranged between the individual magnets.
  • the soft iron cores are hereby made of individual stacked sheet metal elements, which are summarized to a sheet ⁇ element package.
  • the individual thin sheet metal elements must be connected via thin webs with a circumferential ring in the center of the rotor unit.
  • the number and cross-section of Verbin ⁇ -making webs as well as the ring cross-section must be kept as small and narrow as possible.
  • the soft iron portion of such a rotor unit is therefore formed by a package of a plurality of stacked and fixed to each other sheet metal elements.
  • each Sheet metal element package has a plurality of soft iron core ⁇ sections, a ring in the center of the rotor unit and the soft iron core sections with the ring connecting thin Ver ⁇ binding webs.
  • a method is to be made available with which robust rotor units can be produced in a particularly simple and cost-effective manner.
  • the procedure is preferably such that the permanent magnets are inserted into the sheet metal element package, so that they are fixed in this and are in contact with the central ring, the lateral connecting webs and the soft iron core sections.
  • the provided with the permanent magnets sheet metal element package is then in a Kunststoffumsprit zwerkmaschine introduced, and it is performed a Umsprit zvorgang.
  • which is preferably spray-coated on its axial sides and its peripheral surface before the Blechele ⁇ ⁇ management packet and the permanent magnets containing formations.
  • the one-piece Ro ⁇ gate unit produced in this way can be connected via a press fit with a shaft then extending through the opening in the central ring of the plate member packet.
  • the invention proposes a particularly preferred alternative in which the producible ⁇ procedure used for the rotor assembly comprises the following steps after step c:
  • Sheet metal element package, permanent magnets and shaft by a single Umsprit zvorgang fixed together.
  • This method is therefore particularly simple and inexpensive. Again, preferably the two axial sides of the structure and the peripheral surface of the same are molded around.
  • the method is carried out in two stages, wherein in a first process section the
  • Steps a to e are carried out and subsequently in a second process step, a wave in the in the central ring "
  • This method differs from the above- ⁇ be signed variant in that this sheet metal element package, permanent magnets and shaft are not connected in a single process with each other, but instead that a two-step procedure is selected.
  • the invention further relates to a rotor unit with a sheet metal element package having a plurality of radially outer
  • Soft iron core sections and a central ring which are interconnected via connecting webs, and having inserted into the spaces between the connecting webs permanent magnets.
  • This rotor unit is according to the invention characterized in that the permanent magnets are fixed by a plastic extrusion of the rotor unit in the intermediate spaces. This results in a robust rotor unit is provided, are in which the individual permanent magnets in spoke-like arrangement securely in the sheet metal element package (soft iron materials) "buried". The preparation of such a rotor unit before ⁇ preferably with the methods described above.
  • the rotor unit further comprises a shaft inserted into the opening of the central ring, which is fixed by the plastic extrusion of the rotor unit in this.
  • the shaft is connected via a plastic-filled annular gap with the central ring.
  • the rotor unit is preferably encapsulated on both axial sides and on its peripheral surface with plastic.
  • Figure 1 shows a cross section through a rotor unit
  • FIG. 2 shows an axial section through that shown in FIG
  • the rotor unit shown in the figures has a composite of individual sheet metal elements sheet metal element package comprising a plurality of radially outer soft iron core sections 1.
  • the radially outer soft iron core sections 1 are connected via radially extending narrow connecting webs 3 with a central ring 6 in connection.
  • permanent magnets 2 are inserted.
  • a shaft 5 extends.
  • the individual permanent magnets 2 and the shaft 5 are fixed by means of a plastic extrusion coating in the sheet metal element package, resulting in a one-piece rotor unit.
  • FIG. 2 shows that the plastic encapsulation also provides the axial surfaces of the rotor unit with an artificial-material layer (shown at 7). Further, the surface of the shaft 5 is provided in the mounting region of the rotor unit with a contouring having recesses and depressions in order to improve the adhesion between the shaft and the central ring.

Landscapes

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

Abstract

L'invention concerne un procédé de fabrication d'un bloc rotor d'un moteur synchrone à excitation permanente et un bloc rotor. Le procédé comprend la fourniture d'un paquet d'éléments en tôle et d'aimants permanents. Les aimants permanents sont introduits dans des espaces intermédiaires entre les tiges de liaison du paquet d'éléments en tôle. Le produit comprenant le paquet d'éléments en tôle et les aimants permanents est amené dans un outil de surmoulage de matière plastique et le processus de surmoulage est réalisé en vue d'obtenir un bloc rotor comprenant le paquet d'éléments en tôle et les aimants permanents qui sont fixés dans celui-ci. Dans un perfectionnement du procédé selon l'invention, le bloc rotor est fixé sur un arbre par un processus de surmoulage de ce type. L'invention permet ainsi de fabriquer un bloc rotor robuste à l'aide d'un procédé simple et économique.
PCT/EP2015/070392 2014-09-08 2015-09-07 Procédé de fabrication d'un bloc rotor d'un moteur synchrone à excitation permanente et bloc rotor WO2016037983A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014217914.9 2014-09-08
DE102014217914.9A DE102014217914A1 (de) 2014-09-08 2014-09-08 Verfahren zum Herstellen einer Rotoreinheit eines permanent erregten Synchronmotors und Rotoreinheit

Publications (1)

Publication Number Publication Date
WO2016037983A1 true WO2016037983A1 (fr) 2016-03-17

Family

ID=54065881

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/070392 WO2016037983A1 (fr) 2014-09-08 2015-09-07 Procédé de fabrication d'un bloc rotor d'un moteur synchrone à excitation permanente et bloc rotor

Country Status (2)

Country Link
DE (1) DE102014217914A1 (fr)
WO (1) WO2016037983A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018099507A1 (fr) 2016-12-01 2018-06-07 Schaeffler Technologies AG & Co. KG Rotor d'un moteur électrique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017206092A1 (de) * 2017-04-10 2018-10-11 BSH Hausgeräte GmbH Elektrischer Antriebsmotor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070132335A1 (en) * 2005-12-08 2007-06-14 Ionel Dan M Rotor assembly having a reduced back portion and a method of manufacturing same
DE102012212772A1 (de) * 2012-07-20 2014-01-23 Robert Bosch Gmbh Korrosionsgeschützter Rotor für eine elektrische Maschine
EP2696470A2 (fr) * 2012-08-07 2014-02-12 Nidec Corporation Rotor et procédé de fabrication de rotor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010031399A1 (de) * 2010-07-15 2012-01-19 Hilti Aktiengesellschaft Rotor für einen Elektromotor, Elektromotor und Herstellungsverfahren für einen Elektromotor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070132335A1 (en) * 2005-12-08 2007-06-14 Ionel Dan M Rotor assembly having a reduced back portion and a method of manufacturing same
DE102012212772A1 (de) * 2012-07-20 2014-01-23 Robert Bosch Gmbh Korrosionsgeschützter Rotor für eine elektrische Maschine
EP2696470A2 (fr) * 2012-08-07 2014-02-12 Nidec Corporation Rotor et procédé de fabrication de rotor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018099507A1 (fr) 2016-12-01 2018-06-07 Schaeffler Technologies AG & Co. KG Rotor d'un moteur électrique
DE102016223976A1 (de) 2016-12-01 2018-06-07 Schaeffler Technologies AG & Co. KG Rotor eines Elektromotors

Also Published As

Publication number Publication date
DE102014217914A1 (de) 2016-03-10

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