WO2013131795A2 - Rotor et machine électrique - Google Patents

Rotor et machine électrique Download PDF

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Publication number
WO2013131795A2
WO2013131795A2 PCT/EP2013/053913 EP2013053913W WO2013131795A2 WO 2013131795 A2 WO2013131795 A2 WO 2013131795A2 EP 2013053913 W EP2013053913 W EP 2013053913W WO 2013131795 A2 WO2013131795 A2 WO 2013131795A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
partial
axis
rotors
magnets
Prior art date
Application number
PCT/EP2013/053913
Other languages
German (de)
English (en)
Other versions
WO2013131795A3 (fr
Inventor
Gurakuq Dajaku
Original Assignee
Feaam 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 Feaam Gmbh filed Critical Feaam Gmbh
Publication of WO2013131795A2 publication Critical patent/WO2013131795A2/fr
Publication of WO2013131795A3 publication Critical patent/WO2013131795A3/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
    • 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
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H02K1/246—Variable reluctance rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/12—Machines characterised by the modularity of some components
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Definitions

  • Rotor and electric machine The present invention relates to a rotor for an electric machine. Furthermore, the invention relates to an electrical machine with such a rotor.
  • Electric machines include a stator and a rotor movable relative thereto. Depending on the relative movement, a distinction is made between rotating machines and linear machines. Electrical machines can work by motor or generator, converting electrical energy into rotational energy or translational energy, or vice versa.
  • This torque ripple may result from the interaction between the magnetic flux due to stator currents and the magnetic flux of the rotor.
  • the torque ripple is the result of the interaction between higher harmonics of the flux density of the air gap, the rotor magnet and the Stator current is generated.
  • the cogging torque finally is He, as a variable reluctance consists ⁇ result of an interaction between the magnetic flux emanating from the magnet and the stator geometry depending on the angular position of the rotor.
  • the torque ripple and the cogging torque be less than 5% and 0.5% of the rated torque
  • sol ⁇ len There have so far been described different approaches to adorn these unwanted cogging or torque ripple to redu ⁇ .
  • previously known approaches are usually associated with a reduced efficiency of the machine and / or higher manufacturing costs.
  • a stator for an electrical machine which comprises at least two parts, which each have grooves for receiving electrical Wick ⁇ lungs.
  • the slot openings of the two stators are shifted from each other in the circumferential direction.
  • the stators are combined with each other axially and / or circumferentially.
  • This approach leads to an effective reduction of the cogging torque of the electric machine, largely without the above-described disadvantages of hitherto known approaches.
  • ER calls this approach a change in the geometry of the Sta ⁇ tors.
  • the rotor for an electric machine comprises a first and a second sub-rotor. These each have at least one magnet and at least ei ⁇ ne associated with the magnet flux barrier.
  • the flux barrier is designed to inhibit the magnetic flux in the rotor.
  • the flow barrier of the at least one two ⁇ th sub -rotor is arranged shifted with respect to the at least one flow barrier of the first sub-rotor in the circumferential direction of the rotor.
  • the two sub-rotors are combined with each other in the axial direction and / or in the circumferential direction.
  • the flow barriers of the rotor can be designed, for example, as air-filled cavities of the rotor.
  • the flow barriers directly adjoin the magnets in the circumferential direction on opposite sides.
  • Displacement in one embodiment, means that a flux barrier that attaches to a magnet is expanded in the circumferential direction, that is, enlarged, while the opposite flux barrier on this magnet can be reduced by the corresponding amount.
  • the displacement of the flux barriers relative to one another is designed such that the minimum of the reluctance of the rotor is shifted relative to one another, that is to say in comparison with the two sub-rotors.
  • Rotors of electric machines can be described with the d-q-axis theory.
  • the d-axis lies in the middle of a rotor pole, and the q-axis lies between two rotor poles.
  • the q-axis is shifted by 90 ° with respect to the d-axis.
  • the d-axis represents the location with the highest reluctance and the q-axis the place with the lowest reluctance.
  • the d-axis represents the region of highest reluctance and the q-axis represents the region of least reluctance.
  • Flow barriers are preferably regions of non-magnetic and non-electrical material, such as air. You can, for example, as a cavity in the Rotor laminated core be realized. This cavity borders be ⁇ vorzugt of the magnet and is enclosed by the way the iron of the Ro ⁇ tors.
  • Ver ⁇ shift the range of minimum reluctance of the rotor acts out so that the q-axis is also displaced and located in the middle of the minimum of the range of minimum reluctance rotor.
  • the asymmetric displacement of the flux barriers causes the q-axis to be shifted by an angle.
  • the shift angles of the q-axes of the sub-rotors are equal in magnitude to a rotor with conventional flux-barriers, but have a different sign.
  • the sub-rotors each have at least one magnetic north pole and a magnetic South Pole on.
  • the north pole and the south pole per each have ge ⁇ genüberode flux barrier, wherein the mustlie ⁇ constricting flow barrier of the North Pole, as well as the south pole with respect to a respective axis of symmetry of a conventional rotor are designed asymmetrically.
  • Partial rotors are preferably combined with each other, which apart from the described asymmetric displacement of the flow barriers have the same structure, in particular the same rotor geometry.
  • the sub-rotors When the sub-rotors are combined in the axial direction, the sub-rotors may even have a completely identical structure, but are not axially combined in the same sense, but one of the sub-rotors is combined in the opposite direction with the other.
  • the first and the second part rotor in the embodiment with permanent magnets, at least one of the following types: magnets used in grooves, buried magnets, such as buried tangential magnets or buried V magnets, or a buried Mehr fürstruk ⁇ structure .
  • magnets used in grooves buried magnets, such as buried tangential magnets or buried V magnets, or a buried Mehr fürstruk ⁇ structure .
  • buried magnets such as buried tangential magnets or buried V magnets, or a buried Mehr harshstruk ⁇ structure .
  • a buried Mehr für Ststruk ⁇ structure Preferably cuboid magnets are used.
  • the rotor may be designed as a reluctance rotor, in which case the first and second part-rotors are also designed as reluctance rotors.
  • an electric machine is provided with a stator and a rotor described above.
  • the stator may be designed to receive electrical windings, for example in stator slots.
  • the stator for receiving a three-phase electrical Be provided system, but there are other current systems ⁇ me possible.
  • FIG. 2 shows an exemplary embodiment of an electrical machine with a second partial rotor according to the proposed principle
  • FIG. 3 shows an embodiment of a rotor in which the first and second part-rotors according to FIGS. 1 and 2 are combined axially with one another
  • Figure 4 shows a conventional rotor with V-shaped buried
  • FIG. 6 shows an example of a diagram of torque profiles
  • FIG. 1 shows an embodiment of an electrical machine having a stator 1 and a rotor, wherein a first portion rotor 2 is shown in FIG. 1
  • the first part rotor 2 has buried V-shaped arranged magnetic poles, which are formed as north pole N and south pole S.
  • Insge ⁇ velvet are two magnetic pole pairs, that is a total of four buried magnets S, N provided, opposite magnets are each of the same polarity.
  • a flux barrier 4, 5 which is realized as an air-filled cavity.
  • the flux barrier 4, 5 respectively cavities in the iron core of the rotor which adjoin the permanent magnets ⁇ S, N are.
  • the d-axis passes through the center of a rotor pole N, while the q-axis is electrically perpendicular to it and in the middle between the north pole N and an adjacent south pole S runs.
  • the geometric angle is not 90 °, but only half of it, namely 45 ° between the d-axis and q-axis.
  • the d-axis represents the region of maximum reluctance of the rotor, while the q-axis represents the region of least reluctance.
  • FIG. 2 shows an electric machine with a second partial rotor 3 on an exemplary embodiment.
  • the structure and the geometry of the two sub-rotors of Figures 1 and 2 are completely identical, except for the asymmetry of the flux barriers, which are not clockwise in Figure 2, but in the counterclockwise direction. This results in the example of Figure 2, a displacement of the q-axis counterclockwise, by an angle r .
  • the displacement angle r of the examples of Figures 1 and 2 is moderate be ⁇ supporting the same, but in opposite directions. If the partial rotors 2, 3 according to FIGS. 1 and 2 are combined axially one after the other to form a common rotor, the result is a rotor according to the embodiment of FIG. 3.
  • the second partial rotor 3 according to FIG. 2 is behind the first part Rotor shown in FIG.
  • the stator 1 is not shown in the illustration of Figure 3 for the sake of clarity. It can be seen that the resulting q-axis of the entire rotor of Figure 3, which is characterized by superposition of the q-axis ql of the first part of the rotor 2 and the q-axis q2 of the second sub-rotor 3 results, just again at an angle of electrically 90 ° to the d-axis of the Ge ⁇ felrotors.
  • the d-axis of the overall rotor is identical to the dl-axis of the first sub-rotor and the d2-axis of the second sub-rotor. Function and advantages of this Ausgestal ⁇ tion will be explained later with reference to Figure 6.
  • Figure 4 shows a conventional rotor with V-shaped buried magnets S, N and symmetrically at the outer
  • Figures 5A and 5B show the field curves for the magneti ⁇ rule flux in the rotor and stator, wherein Figure 5A 5B is an exemplary detail of Figure 1 and Figure is an exemplary detail of FIG 2 with respect to the rotor and Statorgeo ⁇ geometry.
  • Figure 5A 5B is an exemplary detail of Figure 1
  • Figure is an exemplary detail of FIG 2 with respect to the rotor and Statorgeo ⁇ geometry.
  • the resulting torque curve - is drawn in dashed lines ⁇ and applies to the overall arrangement of Figure 3.
  • the total rotor is half formed from the sub-rotors 2 and 3. It can be clearly seen that the total torque ripple is very clearly reduced in the circumferential direction as a result of the proposed combination of partial rotors 2, 3 with flow barriers displaced relative to one another in the circumferential direction. This is accompanied by a significant reduction in the
  • Consequences of a high torque ripple for example, ⁇ a significant reduction of vibrations of the electric machine during operation and the operating noise and ultimately a significant improvement in efficiency.
  • FIGS. 7A and 7B show a further embodiment of the proposed principle with buried, tangential permanent magnets based on respective examples of two partial rotors.
  • the embodiment is based in its structure, the function ⁇ way and the advantageous mode of action on that ge ⁇ according to the figures 1 to 3 and will not be described in this respect again.
  • the V-shaped magnets instead of the V-shaped magnets are introduced in a tangential design in the sub-rotors.
  • FIGS. 7A and 7B show partial rotors according to an application of the proposed principle to a pure reluctance rotor without permanent magnets.
  • the electrical machine described requires no changes to the stator. It is sufficient to carry out the measures described in the rotor.
  • the asymmetrical design of the flux barriers 4, 5 can be done in a simple manner by punching the laminated core of the rotor, wherein for the realization 3, only a single punching tool is required, since the rotors of FIGS. 1 and 2 can be manufactured very inexpensively by turning over the laminations and twisting axially combined according to FIG.

Landscapes

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

Abstract

L'invention concerne un rotor pour une machine électrique, qui comprend deux rotors partiels (2, 3) comportant chacun au moins une barrière de flux (4, 5, 4', 5'). Ladite au moins une barrière de flux (4', 5') de la au moins une deuxième partie de rotor (3) est décalée dans le sens périphérique par rapport à la au moins une barrière de flux (4, 5) de la première partie de rotor (2). Les deux rotors partiels (2, 3) sont combinés l'un avec l'autre dans le sens axia et/ou dans le sens périphérique, L'invention concerne également une machine électrique dotée du rotor décrit.
PCT/EP2013/053913 2012-03-05 2013-02-27 Rotor et machine électrique WO2013131795A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210101822 DE102012101822A1 (de) 2012-03-05 2012-03-05 Rotor und elektrische Maschine
DE102012101822.7 2012-03-05

Publications (2)

Publication Number Publication Date
WO2013131795A2 true WO2013131795A2 (fr) 2013-09-12
WO2013131795A3 WO2013131795A3 (fr) 2014-07-24

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PCT/EP2013/053913 WO2013131795A2 (fr) 2012-03-05 2013-02-27 Rotor et machine électrique

Country Status (2)

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DE (1) DE102012101822A1 (fr)
WO (1) WO2013131795A2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170366056A1 (en) * 2016-06-15 2017-12-21 Ford Global Technologies, Llc Electric Machine Rotor
WO2018002128A1 (fr) * 2016-06-30 2018-01-04 Universität der Bundeswehr München Rotor, procédé de fabrication d'un rotor, machine à reluctance et machine de travail
CN108233571A (zh) * 2016-12-15 2018-06-29 福特全球技术公司 电机转子
US10305336B2 (en) 2014-02-11 2019-05-28 Liebherr-Aerospace Lindenberg Gmbh Aircraft comprising a synchronous reluctance machine
CN113056860A (zh) * 2018-11-15 2021-06-29 株式会社万都 可变的电动机叠片
US11616409B2 (en) 2021-02-16 2023-03-28 Ford Global Technologies, Llc Electric machine rotor
US11621594B2 (en) 2020-09-03 2023-04-04 Ford Global Technologies, Llc Electric machine rotor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10256708B2 (en) * 2016-09-22 2019-04-09 General Electric Company Electric machine
CN115694015A (zh) * 2022-11-04 2023-02-03 华为数字能源技术有限公司 转子、永磁电机、动力总成及车辆

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE102010032764A1 (de) 2010-07-29 2012-02-02 Feaam Gmbh Elektrische Maschine und Stator für dieselbe

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DE19933009A1 (de) * 1998-07-24 2000-02-10 Matsushita Electric Ind Co Ltd Motor mit interne Permanentmagneten enthaltendem Rotor und einen solchen Motor verwendende Antriebseinheit
JP4070674B2 (ja) * 2003-07-31 2008-04-02 株式会社東芝 リラクタンス型回転電機の回転子
JP2007097387A (ja) * 2005-08-31 2007-04-12 Toshiba Corp 回転電機
JP4708448B2 (ja) * 2008-03-04 2011-06-22 日立オートモティブシステムズ株式会社 回転電機および電気自動車
US7843100B2 (en) * 2009-03-18 2010-11-30 Gm Global Technology Operations, Inc. Methods and apparatus for preventing demagnetization in interior permanent magnet machines
JP5202455B2 (ja) * 2009-07-03 2013-06-05 三菱電機株式会社 永久磁石埋め込み型回転子及び掃除機
JP5385077B2 (ja) * 2009-10-02 2014-01-08 アスモ株式会社 回転電動機
JP5208088B2 (ja) * 2009-10-30 2013-06-12 三菱電機株式会社 永久磁石埋込型電動機及び送風機
JP5556400B2 (ja) * 2010-06-09 2014-07-23 富士電機株式会社 回転子鉄心部材及び永久磁石固定方法

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Publication number Priority date Publication date Assignee Title
DE102010032764A1 (de) 2010-07-29 2012-02-02 Feaam Gmbh Elektrische Maschine und Stator für dieselbe

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10305336B2 (en) 2014-02-11 2019-05-28 Liebherr-Aerospace Lindenberg Gmbh Aircraft comprising a synchronous reluctance machine
US20170366056A1 (en) * 2016-06-15 2017-12-21 Ford Global Technologies, Llc Electric Machine Rotor
US10523072B2 (en) * 2016-06-15 2019-12-31 Ford Global Technologies, Llc Electric machine rotor
WO2018002128A1 (fr) * 2016-06-30 2018-01-04 Universität der Bundeswehr München Rotor, procédé de fabrication d'un rotor, machine à reluctance et machine de travail
US11011948B2 (en) 2016-06-30 2021-05-18 Vitesco Technologies Germany Gmbh Rotor, method for producing a rotor, reluctance machine, and working machine
CN108233571A (zh) * 2016-12-15 2018-06-29 福特全球技术公司 电机转子
CN108233571B (zh) * 2016-12-15 2022-02-08 福特全球技术公司 电机转子
CN113056860A (zh) * 2018-11-15 2021-06-29 株式会社万都 可变的电动机叠片
US11621594B2 (en) 2020-09-03 2023-04-04 Ford Global Technologies, Llc Electric machine rotor
US11616409B2 (en) 2021-02-16 2023-03-28 Ford Global Technologies, Llc Electric machine rotor

Also Published As

Publication number Publication date
WO2013131795A3 (fr) 2014-07-24
DE102012101822A1 (de) 2013-10-10

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