WO2016131588A1 - Rotor pour une machine électrique ainsi que machine électrique - Google Patents

Rotor pour une machine électrique ainsi que machine électrique Download PDF

Info

Publication number
WO2016131588A1
WO2016131588A1 PCT/EP2016/050988 EP2016050988W WO2016131588A1 WO 2016131588 A1 WO2016131588 A1 WO 2016131588A1 EP 2016050988 W EP2016050988 W EP 2016050988W WO 2016131588 A1 WO2016131588 A1 WO 2016131588A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
elements
cover elements
magnetic
segment
Prior art date
Application number
PCT/EP2016/050988
Other languages
German (de)
English (en)
Inventor
Henning Hanßen
Anton Braeunig
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 WO2016131588A1 publication Critical patent/WO2016131588A1/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

Definitions

  • the invention relates to a segmented rotor for an electric machine and an electric machine with such a rotor.
  • Modern electrical machines can often have a complex structure, about to meet the performance requirements.
  • Embodiments of the present invention may advantageously enable to provide a robust rotor for an electric machine as well as a robust electric machine.
  • the rotor has a rotor segment, which has a disk set with laminations stacked one above the other in the longitudinal extension direction of the rotor, wherein on an outer circumference of the
  • Rotor segment a plurality of circumferentially spaced apart from the rotor recesses is provided, in which recesses in each case at least one magnetic element is arranged.
  • the rotor according to the invention is characterized in particular by the fact that the recesses in the radial direction of the rotor are designed to be open towards the outside, wherein a cover element is arranged in each recess.
  • the magnetic elements are in the radial direction of the rotor in each case between the disk set and one of
  • Cover elements received in such a way that the magnetic elements are fixed in the radial direction.
  • the cover elements are also each front of the
  • Rotor segment held. During an assembly or a manufacturing process of the rotor so the magnetic elements from the radial direction of the rotor, in particular
  • the magnet elements can furthermore be reliably fixed via the cover elements which are subsequently introduced into the cutouts on the outside of the rotor and which are held on the rotor segment at the end. This can improve a mounting capability of the magnetic elements or simplify assembly and overall simplify and / or accelerate the manufacturing process of the rotor, which in turn can cause a cost-effective production of the rotor.
  • the cover elements each have at least one opening, which each extend over an entire length of the cover elements in the longitudinal direction of extension of the rotor.
  • a rod-shaped fixing element is arranged in each opening, which front side of the rotor segment for fixing the cover elements and / or the
  • the cover elements can each have at least one rod-shaped fixing element, which in the
  • Openings of the cover elements can be inserted, held and / or be fixed.
  • the fixing elements can be held and / or fixed predominantly or exclusively on the front side of the rotor segment. On the one hand, this can simplify a manufacturing process of the rotor or one
  • the cover elements are each spaced from the disc pack in the circumferential direction of the rotor
  • the cover elements in the circumferential direction may, for example, be provided a gap between the disk set and each cover element in the circumferential direction, wherein the gap may be filled with air or another, preferably non-magnetizable material.
  • Circumferential direction is not in contact with the disk pack or can be provided in the circumferential direction a material interruption between the cover elements and the disk set.
  • Magnetic short circuit can be understood here and below as meaning that a part of a magnetic flux of the magnetic elements in a magnetization surrounding material is lost.
  • Disk pack can be caused by the magnetic elements
  • magnetic flux can be interrupted and / or a short circuit of a magnetic circuit of each magnetic element can be avoided. Furthermore, short-circuit losses, for example due to magnetization of the cover elements and / or the disk pack induced by the magnetic elements, can thereby be reduced, and a magnetic resistance for driving the rotor can be increased.
  • the actually used at least indirectly for driving the rotor magnetic field of the magnetic elements can be used so efficiently or Torque losses can be reduced by inefficient use of the magnetic elements.
  • two magnetic elements are arranged in each recess.
  • the two magnetic elements can in
  • the two magnetic elements can be arranged approximately V-shaped in the recesses of the disk set. Overall, such a caused by the magnetic elements magnetic
  • Resistance or locally generated by the magnetic elements magnetic field to be increased, which can interact at least for the indirect drive of the rotor with a magnetic field generated by a stator.
  • the rotor further comprises at least one further rotor segment, which in the longitudinal direction of the
  • Rotor is separated by an intermediate disc of the rotor segment, wherein the cover elements of the rotor segment and the cover elements of the at least one further rotor segment are respectively held on the intermediate disc.
  • the rotor can be manufactured in segments, which in total the
  • the intermediate disc has a plurality of circumferentially spaced apart openings along an outer periphery, wherein each of the openings of the intermediate disc in the longitudinal direction of the rotor with an opening of one of
  • Cover elements of the at least one further rotor segment is formed in alignment.
  • a rod-shaped fixing element is arranged in the aligned with each other openings for fixing the magnetic elements and / or the cover elements.
  • the openings of the intermediate disc can each with a first opening of the
  • Fixing can be held on the washer.
  • the openings of the intermediate disc and the openings of the cover elements may extend in the longitudinal direction of the rotor.
  • the rotor further comprises a balancing disk on each end face of the rotor, each balancing disk having a plurality of circumferentially spaced apart openings aligned with the openings of the intermediate disk, such that one end of each rod-shaped fixing element is provided on the front side of the rotor is held in each case in an opening of one of the balancing disks.
  • the individual fixing elements can thus both in the openings of the
  • the rod-shaped fixing elements each extend over an entire length of the rotor.
  • a single fixing element can fix a multiplicity of cover elements which are adjacent in the longitudinal extension direction, so that assembly of the rotor can be simplified. Also so production costs of the rotor can be reduced.
  • the intermediate disc is made of a magnetically insulating or a non-magnetizable material.
  • a non-magnetizable material or a magnetically insulating material can here and below be a material with lower and / or
  • negligible magnetic permeability for example, a relative magnetic permeability of less than or equal to 1.0
  • Washers of fiber reinforced plastic such as carbon fiber reinforced or glass fiber reinforced plastic, or a relative magnetic
  • the intermediate disc is made of a fiber-reinforced plastic.
  • the washer made of a glass fiber reinforced plastic (GRP) and / or a
  • CFRP carbon fiber reinforced plastic
  • the cover elements are made of a magnetizable material and / or a magnetically conductive material.
  • the cover elements may be made of a ferromagnetic material, for example an electrical sheet.
  • the fixing elements can be made of a magnetizable or magnetically conductive material.
  • a magnetizable or a magnetically conductive material may denote a material of high magnetic permeability, wherein a value of the permeability may be, for example, in a range of a permeability of an electric sheet.
  • the fixing need not necessarily be made of magnetizable material, but can also be made of magnetically insulating material.
  • Another aspect of the invention relates to an electric machine having a stator and a rotatably mounted relative to the stator rotor, such as
  • the electric machine may further comprise a, about a hub, with the rotor rotatably connected and rotatably mounted relative to the stator shaft.
  • FIG. 1 shows an electrical machine according to an embodiment of the
  • Fig. 2 shows a section through a part of a rotor segment for a rotor according to an embodiment of the invention.
  • Fig. 3 shows a perspective view of a part of a rotor according to an embodiment of the invention.
  • Fig. 1 shows an electrical machine 100 according to an embodiment of the invention.
  • the electric machine 100 has a housing 101 with a cover 102 on each end face 104, 106 and a shaft 108 rotatably mounted in the covers 102.
  • the electric machine 100 may be about
  • the shaft 108 is rotatably connected to a rotor 10 disposed inside the housing 101.
  • the rotor 10 is rotatably mounted relative to a stator 110 disposed inside the housing 101.
  • Fig. 2 shows a section through a portion of a rotor segment 12 for a
  • FIG. 3 shows a perspective view of a part of a rotor 10 according to a
  • the rotor segments 12 each have a disk set 14 in
  • a plurality of circumferentially spaced apart from the rotor 10 recesses 20 are introduced into the disk set, which are designed to be open in the radial direction of the rotor 10 to the outside, so that the recesses 20 from a lateral surface of the rotor 10 from can be accessible.
  • the radial direction is orthogonal to the longitudinal extension direction 16 of the rotor 10.
  • the recesses 20 may be approximately cut out of the laminations 18 of the disk set 14 punched recesses or punched holes.
  • Recesses 20 may thus be macroscopic depressions accessible from an outside of the rotor 10. As can be seen in FIG. 2, each of the
  • Recesses 20 have a substantially V-shaped cross-section.
  • each recess 20 is a first magnetic element 22 and a second
  • Magnet element 24 is arranged, which rest in each case with a base 21 on the disk set 14.
  • the two magnetic elements 22, 24 can so in
  • Cross section V-shaped to be arranged It can also be provided in each recess 20 only one magnetic element 22, 24 each.
  • the magnetic elements 22, 24 may be about permanent magnets.
  • the magnetic elements 22, 24 are designed to generate a magnetic field which, by interaction with a magnetic field generated by the stator 110, can set the rotor 10 in rotation and / or generate a torque.
  • a material interruption 19 is provided or are the two
  • Magnetic elements 22, 24 arranged spaced apart in the circumferential direction of the rotor 10 in the recesses 20, so that a kind of magnetic short circuit between the two magnetic elements 22, 24 can be avoided. This can have an advantageous effect on a maximum producible torque of the rotor 10.
  • the magnetic elements 22, 24 are further arranged in the circumferential direction of the rotor 10 in each case spaced from the disk pack 14.
  • the magnetic elements 22, 24 are not in the circumferential direction of the disk set 14 and is provided in the circumferential direction between the magnetic elements 22, 24 and the disk set each have a gap 25, so that a through the
  • Magnetic elements 22, 24 caused magnetic flux can be interrupted. This can increase a magnetic resistance opposing a magnetic field caused by the stator 110 and thus be advantageous a maximum effect by interaction of the magnetic field of the stator 110 with the magnetic fields of the magnetic elements 22, 24 generate torque.
  • the gaps 25 may be approximately filled with air and / or filled with a material of low or vanishing magnetic permeability.
  • the magnetic elements 22, 24 could so, for example to avoid magnetic
  • Short circuits be magnetically isolated in the circumferential direction against the disk set or can the column 25 as a kind of magnetic isolation of
  • Magnetic elements 22, 24 are considered relative to the plate pack 14. Further, in each recess 20 on the outside of the rotor 10 each one
  • Cover element 26 is arranged. It should be noted that in FIG. 3, for the sake of clarity and recognizability, only one cover element 26 of a
  • Rotor segment 12 is indicated by a dashed line.
  • a cover element 26 may be provided in each recess 20.
  • the cover elements 26 are made of magnetizable material, i. a material of high magnetic permeability, such as a ferromagnetic material manufactured.
  • the cover elements 26 may be made of electrical sheet.
  • Cover elements 26 have a cross-sectionally V-shaped base surface 27, which rests against one of the base surface 21 of the magnetic elements 22, 24 in the radial direction opposite surface 23 of each magnetic element 22, 24.
  • the magnetic elements 22, 24 of a rotor segment 12 are thus arranged in the recesses 20 in the radial direction between the disk set 14 and the cover element 26, so that the magnetic elements 22, 24 held by the cover elements 26 in the recesses 20 at least in the radial direction and / or are fixed.
  • a central web 28 of the cover element can in
  • Area of material interruption 19 between the two magnetic elements 22, 24 may be arranged.
  • the cover elements 26 are arranged spaced apart in the circumferential direction of the rotor 10 via a gap 33 and material interruptions to the disk set 14. In other words, the cover elements 26 are received or arranged without contact in the circumferential direction with respect to the disk set 14 in the recesses 20. These material interruptions or the gaps 33 are used to avoid magnetic short circuits between the cover elements 26 and the disk set, which in turn can advantageously affect a maximum torque can be generated.
  • the gaps 33 may be filled with air or some other magnetically insulating material.
  • the cover elements 26 each have two openings 30, which extend parallel to the longitudinal extension direction 16 of the rotor 10 over an entire length of each cover element 26. It can also be provided only one opening 30 or more than two openings per cover element 26. To fix the
  • a rod-shaped fixing element 32 is disposed in each of the openings 30.
  • the fixing elements 32 can be considered as retaining bolts and be made of magnetizable material.
  • each balancing disk 36 is arranged on each end face 34 of the rotor 10, wherein each balancing wheel 36 has a plurality of circumferentially spaced-apart openings 38 which are each parallel to the longitudinal direction 16 of the
  • Rotor 10 extend over an entire thickness of each balancing disc 36.
  • the openings 38 of the balancing disks 36 are formed in alignment with the openings 30 of the cover elements 26, so that in each case one end of each
  • the rotor 10 as shown in FIG. 3, has a plurality of rotor segments 12, two are each directly adjacent in the longitudinal direction 16
  • Rotor segments 12 separated by an intermediate disc 40 may be made of fiber-reinforced plastic, for example
  • the intermediate disks 40 each have along an outer circumference a plurality of circumferentially
  • each washer 40 spaced-apart openings 42, which extend over an entire thickness of each washer 40 parallel to the longitudinal direction 16 of the rotor 10.
  • Each of the openings 42 of the intermediate discs 40 is aligned in each case with an opening 30 of each directly to the respective
  • the openings 42 of the intermediate disc 40 are each aligned with one of the openings 38 of each balancing disc 36.
  • the mutually aligned openings 30, 38, 42 of the Cover elements 26, the balancing disks 36 and the intermediate disks 40 thus each form a type of continuous channel, which extends over an entire length of the rotor 10 parallel to the longitudinal extension direction 16, so that in each of the mutually aligned openings 30, 38, 42, a fixing element 32nd can be introduced or inserted, each fixing element 32 is held both in the respective openings 42 of the intermediate discs 40 and in the respective openings 38 of the balancing discs 36 and / or fixed.
  • the individual fixing elements 32 extend over an entire length of the rotor 10.
  • the inventive design of the rotor 10 may further include a
  • An assembly can be carried out approximately segmentally, wherein about the magnetic elements 22, 24, the cover elements 26 and the intermediate discs 40 can be slid onto the fixing elements 32 in segments. Also, approximately in each case a recess 20 of each rotor segment 12, the magnetic elements 22, 24 and the cover elements 26 are inserted and the fixing then over the entire length of the rotor 10 in the corresponding openings 30, 38, 42 are inserted.

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

Abstract

L'invention concerne un rotor (10) pour une machine électrique (100) ainsi qu'une machine électrique (100) équipée d'un rotor (10) de ce type. Le rotor (10) comprend un segment de rotor (12) qui comprend un paquet de lamelles (14) comportant des lamelles en tôle (18) empilées les unes au-dessus des autres dans la direction longitudinale (16) du rotor (10), un pourtour extérieur du segment (12) du rotor comportant une pluralité d'évidements (20) écartés les uns des autres et au moins un élément magnétique (22, 24) étant disposé dans chaque évidement (20). Le rotor (10) est caractérisé en particulier en ce que les évidements (20) sont agencés de manière ouverte vers l'extérieur dans la direction radiale du rotor (10), dans chaque évidement (20) étant disposé un élément couvrant (26) tandis que chaque élément magnétique (22, 24) est logé dans la direction radiale du rotor (10) entre le paquet de lamelles (14) et un des éléments couvrant (26) de telle manière que les éléments magnétiques (22, 24) sont fixés dans la direction radiale. Chaque élément couvrant (26) est maintenu en face du segment (12) du rotor. Cela permet de simplifier un montage du rotor (10) et d'assurer une constance de régime du rotor (10).
PCT/EP2016/050988 2015-02-19 2016-01-19 Rotor pour une machine électrique ainsi que machine électrique WO2016131588A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015203012.1A DE102015203012A1 (de) 2015-02-19 2015-02-19 Rotor für eine elektrische Maschine sowie elektrische Maschine
DE102015203012.1 2015-02-19

Publications (1)

Publication Number Publication Date
WO2016131588A1 true WO2016131588A1 (fr) 2016-08-25

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ID=55229658

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/050988 WO2016131588A1 (fr) 2015-02-19 2016-01-19 Rotor pour une machine électrique ainsi que machine électrique

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WO (1) WO2016131588A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016222398A1 (de) 2016-11-15 2018-05-17 Robert Bosch Gmbh Optimierte elektrische Maschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4689973A (en) * 1979-09-21 1987-09-01 General Electric Company Laundry machine drive
WO1991009443A1 (fr) * 1989-12-15 1991-06-27 American Motion Systems, Inc. Procede de production en serie de machines rotatives a aimants interieurs et machine rotative a aimants interieurs ainsi produite
WO1999017420A2 (fr) * 1997-09-26 1999-04-08 Empresa Brasileira De Compressores S.A. - Embraco Rotor de moteur electrique et procede de production dudit rotor de moteur electrique
WO2005117235A1 (fr) * 2004-05-27 2005-12-08 Abb Oy Rotor pour appareil electrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4689973A (en) * 1979-09-21 1987-09-01 General Electric Company Laundry machine drive
WO1991009443A1 (fr) * 1989-12-15 1991-06-27 American Motion Systems, Inc. Procede de production en serie de machines rotatives a aimants interieurs et machine rotative a aimants interieurs ainsi produite
WO1999017420A2 (fr) * 1997-09-26 1999-04-08 Empresa Brasileira De Compressores S.A. - Embraco Rotor de moteur electrique et procede de production dudit rotor de moteur electrique
WO2005117235A1 (fr) * 2004-05-27 2005-12-08 Abb Oy Rotor pour appareil electrique

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Publication number Publication date
DE102015203012A1 (de) 2016-08-25

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