• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates mainly to a rotating electrical machine comprising a rotor (10) provided with a body (12) having an axis (X), the rotor body (12) having a plurality of longitudinal cavities (16) arranged to receive each at least one permanent magnet (13), - magnetic poles each formed by the permanent magnets (13) housed in two adjacent cavities (16) forming a V in an orthogonal plane (P) to the axis (X) of the body rotor (12), - the rotor (10) having at least one holding part (35) of the permanent magnets (13) in the cavities (16), characterized in that the holding part (35) comprises two strips ( 36), each band (36) having at least one boss (37) for applying a holding force of the corresponding permanent magnet (13) in the cavity (16), and in that the holding piece (35) ) further comprises at least two connecting arms (40) between the two strips (36), the boss (37) extending axially t between the two link arms.
    公开号:FR3064130A1
    申请号:FR1752089
    申请日:2017-03-15
    公开日:2018-09-21
    发明作者:Khadija El Baraka；Svetislav Jugovic
    申请人:Valeo Equipements Electriques Moteur SAS；
    IPC主号:
    专利说明:

    Holder (s): VALEO ELECTRIC EQUIPEMENTS MOTOR Simplified joint-stock company.
    Extension request (s)
    Agent (s): VALEO EQUIPEMENTS ELECTRIQUES MOTOR Simplified joint-stock company.
    104) ROTOR OF ROTATING ELECTRIC MACHINE PROVIDED WITH PERMANENT MAGNET HOLDING PARTS.
    FR 3 064 130 - A1 _ The invention relates mainly to a rotary electric machine comprising a rotor (10) provided with a body (12) having an axis (X), the rotor body (12) comprising a plurality of cavities longitudinal (16) arranged to each receive at least one permanent magnet (13),
    - magnetic poles each formed by permanent magnets (13) housed in two adjacent cavities (16) forming a V in a plane orthogonal (P) to the axis (X) of the rotor body (12),
    - the rotor (10) comprising at least one holding part (35) of permanent magnets (13) in the cavities (16), characterized in that the holding part (35) comprises two elongated bands (36), each band (36) comprising at least one boss (37) intended to apply a force for holding the corresponding permanent magnet (13) in the cavity (16), and in that the holding part (35) further comprises at least two link arms (40) between the two bands (36), the boss (37) extending axially between the two link arms.

    bTz x
    ROTOR OF ROTATING ELECTRIC MACHINE PROVIDED WITH PERMANENT MAGNET HOLDING PARTS
    The invention relates to a rotor of a rotating electric machine provided with parts for holding permanent magnets.
    In a manner known per se, rotary electrical machines comprise a stator and a rotor secured to a shaft. The rotor may be integral with a driving and / or driven shaft and may belong to a rotating electrical machine in the form of an alternator, an electric motor, or a reversible machine capable of operating in both modes.
    îo The stator is mounted in a casing configured to rotate the shaft on bearings by means of bearings. The rotor comprises a body formed by a stack of sheets of metal sheets held in the form of a package by means of a suitable fixing system.
    The stator comprises a body constituted by a stack of thin sheets forming a crown, the inner face of which is provided with notches open towards the inside to receive phase windings. The phase windings are obtained for example from a continuous wire covered with enamel or from conductive elements in the form of pins connected together by welding. These windings are polyphase windings connected in star or triangle whose outputs are connected to an inverter also operating as a rectifier bridge.
    Furthermore, the rotor may include a body formed by a pack of sheets made of a magnetic material, in particular steel, as well as poles formed by a plurality of permanent magnets housed in cavities of the body. When the tolerances of realization of the rotor are large in order to reduce the manufacturing costs, it is possible that the magnets are badly plated inside the cavities of the rotor.
    As illustrated in FIG. 1, in order to keep the magnets inside the rotor 1, it is known to insert into each cavity 2, intended to receive the magnets 3, a flexible strip 4 exerting a holding force on the 3 matching magnets. However, such a device is not optimal during the assembly operation when the cavities 2 of the rotor have a complex profile.
    The invention aims to effectively remedy this drawback by proposing a rotary electric machine comprising a rotor provided with a body having an axis, the rotor body comprising a plurality of longitudinal cavities arranged to each receive at least one permanent magnet,
    - magnetic poles each formed by the permanent magnets housed in two adjacent cavities forming a V in a plane orthogonal to the axis of the rotor body, îo - the rotor comprising at least one piece for holding the permanent magnets in the cavities, characterized in that the retaining piece comprises two elongated strips, each strip comprising at least one boss intended to apply a retaining force for the corresponding permanent magnet in the cavity, and in that the retaining piece also comprises at least two link arm between the two bands, the boss extending axially between the two link arms.
    The invention thus makes it possible to facilitate the positioning of the retaining pieces inside the cavities having a V-shaped configuration relative to retaining pieces with a single strip. The invention also makes it possible to limit the loss of material when cutting sheet metal to produce the holding pieces.
    According to one embodiment, the holding force is applied by the boss on the corresponding permanent magnet in the direction of an external periphery of the rotor body.
    According to one embodiment, at least one strip of the retaining part comprises a stop tab against an end face of the rotor body.
    According to one embodiment, each strip of the holding part comprises a spring for the application of an axial holding force of the permanent magnet in the corresponding cavity.
    According to one embodiment, the retaining part comprises a plurality of bosses formed in each strip.
    According to one embodiment, the holding part has the same number of bosses on each strip.
    According to one embodiment, the retaining part comprises an axial alternation of bosses and link arms.
    According to one embodiment, the link arms extend transversely with respect to a direction of longitudinal elongation of said retaining piece.
    According to one embodiment, the link arms are located inside a junction zone between the two cavities.
    According to one embodiment, the two strips of the holding part are free at their ends.
    The invention will be better understood on reading the description which follows and on examining the figures which accompany it. These figures are given only by way of illustration but in no way limit the invention.
    FIG. 1, already described, is an exploded perspective view of a rotor of a rotary electric machine comprising magnets inserted into longitudinal cavities of said rotor and held by flexible strips according to the state of the art;
    FIG. 2 is an exploded perspective view of a rotor of a rotary electric machine according to the present invention;
    Figure 3 is a perspective view of a permanent magnet holding part according to the present invention;
    Figure 4 is a sectional view of a rotor of a rotary electrical machine according to the present invention illustrating the mounting of a holding part inside two adjacent cavities arranged in a V;
    Figure 5 is a sectional view of a strip of the holding part according to the invention inserted into a cavity of the rotor;
    Figure 6 is a top view of the cut material plate from which is made the holding part according to the present invention.
    Identical, similar, or analogous items retain the same reference from one figure to another.
    Figures 2 and 4 show a rotor 10 mounted on a shaft 11 having a body 12 formed by a pack of sheets made of a magnetic material, in particular steel, as well as a plurality of permanent magnets 13 intended to be housed in cavities 16 of the body 12. The sheets 17 of the package stacked axially can be held by means of rivets 18 to passing axially through the rotor 10 through and through via fixing holes 21. The rotor body 12 of axis X has an opening central 24 for the passage of the shaft 11 extending along the axis X. The shaft 11 may be force-fitted inside the opening 24 to link the rotor body 12 and the shaft in rotation 11.
    The rotor body 12 also includes recesses 25 to lighten the rotor 10. Certain recesses 25, for example one in two, may be used for fixing flanges 27 on the ends of the rotor body 12, such as that shown on Figure 1.
    More precisely, in a section plane P orthogonal to the X axis, the cavities
    16 extend longitudinally in a direction D1. The cavities 16 may be axially through or of blind configuration. The magnetic poles 30 of the rotor 10 are each formed by the magnets 13 housed in two adjacent cavities 16 forming a V in the orthogonal plane P. In other words, the longitudinal elongation directions D1 of two cavities
    16 adjacent form a non-zero angle A relative to each other, as shown in Figure 4. The two adjacent cavities 16 are interconnected by a junction zone 31 extending axially at the tip of the V-profile.
    As can be seen in Figure 2, each cavity 16 receives a plurality of magnets 13 stacked axially on top of each other. In this case, each cavity 16 receives four magnets 13 of parallelepiped shape. As a variant, the number of magnets 13 could of course be different. A single magnet 13 can also be inserted inside each cavity 16. The permanent magnets 13 can be made of rare earth or ferrite depending on the applications and the desired power of the machine.
    The magnets 13 are held in position inside the cavities 16 by means of holding pieces 35. A single holding piece 35 makes it possible to hold the magnets 13 located in two adjacent cavities 16.
    To this end, as illustrated in FIGS. 2 and 3, the holding part 35 comprises two elongated strips 36 each inserted inside a corresponding cavity 16. Each strip 36 is provided with a plurality of bosses 37 intended to apply a holding force F1 of the magnet 13 in the cavity 16, as shown in FIGS. 4 and 5.
    The retaining piece 35 also comprises connecting arms 40 between the two bands 36. The connecting arms 40 extend transversely relative to the direction of axial elongation of the bands 36. Each boss
    37 extends axially with respect to the axis X between two link arms 40. There is thus an axial alternation between the link arms 40 and the bosses 37. The retaining piece 35 has the same number of bosses 37 on each strip 36, or four (one for each magnet 13 housed in the corresponding cavity 16).
    In this case, as can be seen in FIG. 4, the holding force F1 is applied by each boss 37 to a corresponding magnet 13 in the direction of an external periphery of the rotor body 12. For this purpose, each strip 36 is located on the side of the internal periphery of the rotor 10 and is interposed between the magnet 13 and an internal support face 41 of the cavity 16 facing the external periphery of the rotor body 12. Each boss 37 is compressed and applies by reaction on a magnet 13 corresponding a force F1 in a direction parallel to the longitudinal direction D1 of the cavity 16.
    Furthermore, each strip 36 includes a spring 44 for applying an axial holding force F2 to the stack of magnets 13 inside the corresponding cavity 16, as illustrated by FIG. 5. Each spring 44 is constituted by a flange extending substantially perpendicular to the direction of longitudinal elongation of the corresponding strip 36. Each spring 44 is provided with a boss 37 intended to be compressed between a magnet 13 at the end of the stack and an end flange 27 for application by reaction of the axial holding force F2.
    Preferably, at least one strip 36 of the retaining part 35 comprises a stop tab 45 against an end face of the rotor body 12, as can be seen in FIGS. 3 and 5. This thus makes it possible to maintain in position the holding part 35 of the magnets 13 during assembly of the rotor.
    îo The two strips 36 are free at their ends, that is to say that they are not connected to each other by link arms 40 at their end.
    The method of manufacturing the holding pieces 35 formed from an elongated metal plate 48 shown in FIG. 6 is described below.
    Longitudinal notches 49 are produced by cutting in the middle part of the plate 48 at regular intervals in order to delimit the strips 36 and the link arms 40. Bosses 37 are made in the zones separating two successive link arms 40.
    One end of each strip 36 carrying a boss 37 is folded back to form the spring 44 while the other end is folded back to form the abutment tab 45. In order to facilitate folding, the retaining piece 35 may include a zone of folding consisting of a thinning of local material or two notches formed in the edges of the strips 36.
    Each retaining part 35 is inserted inside the corresponding V-shaped cavities 16, so that each strip 36 bears against a bearing face 41 visible in FIG. 4 to apply the retaining force F1 on the magnets 13 The link arms 40 are inserted inside the junction zone 31 between the two cavities 16.
    Two flanges 27 advantageously made of non-magnetic steel, such as that shown in FIG. 1, are arranged at each axial end of the body 12 to ensure that the magnets 13 are retained inside the cavities 16 and that the rotor 10 is balanced. fasteners, such as screws, are inserted in some of the recesses 25 to secure the flanges.
    Furthermore, the rotary electric machine may include a stator (not shown) surrounding the rotor 10 with the presence of an air gap. This stator comprises a body constituted by a stack of thin sheets forming a crown, the inner face of which is provided with notches open towards the inside to receive phase windings. The phase windings are obtained, for example, from a continuous wire covered with enamel, or from conductive elements in the form of pins connected together by welding. These windings are polyphase windings connected in star or triangle whose outputs are connected to an inverter also operating as a rectifier bridge.
    Of course, the foregoing description has been given by way of example only and does not limit the field of the invention from which one would not depart by replacing the various elements with any other equivalent.
    Furthermore, the various features, variants, and / or embodiments of the present invention can be combined with one another in various combinations, insofar as they are not incompatible or mutually exclusive of one another.
    权利要求:
    Claims (7)
    [1" id="c-fr-0001]
    1. Rotating electric machine comprising a rotor (10) provided with a body (12) having an axis (X), the rotor body (12) comprising a plurality of longitudinal cavities (16) arranged to each receive at least one
    5 permanent magnet (13),
    - magnetic poles (30) each formed by permanent magnets (13) housed in two adjacent cavities (16) forming a V in a plane orthogonal (P) to the axis (X) of the rotor body (12),
    - The rotor (10) comprising at least one holding piece (35) of the permanent magnets (13) in the cavities (16), characterized in that the holding piece (35) comprises two elongated bands (36), each strip (36) comprising at least one boss (37) intended to apply a holding force (F1) of the corresponding permanent magnet (13) in the cavity (16), and in that the holding piece (35)
    15 further comprises at least two link arms (40) between the two bands (36), the boss (37) extending axially between the two link arms.
    [2" id="c-fr-0002]
    2. rotary electric machine according to claim 1, characterized in that the holding force (F1) is applied by the boss (37) on the permanent magnet (13) corresponding in the direction of an external periphery
    20 of the rotor body (12).
    [3" id="c-fr-0003]
    3. Rotating electric machine according to claim 1 or 2, characterized in that at least one strip (36) of the holding part (35) has an abutment tab (45) against an end face of the rotor body (12).
    25
    [4" id="c-fr-0004]
    4. Rotating electric machine according to any one of claims 1 to 3, characterized in that each strip (36) of the holding part (35) comprises a spring (44) for the application of an axial holding force (F2) of the permanent magnet (13) in the corresponding cavity (16).
    5. Rotating electric machine according to any one of claims 1 to 4, characterized in that the holding part (35) comprises a plurality of bosses (37) formed in each strip (36).
    6. Rotating electric machine according to claim 5, characterized in that the holding part (35) has the same number of bosses (37) on each strip (36).
    [5" id="c-fr-0005]
    5 7. A rotary electrical machine according to claim 5 or 6, characterized in that the holding part (35) comprises an axial alternation of bosses (37) and of link arms (40).
    [6" id="c-fr-0006]
    8. Rotating electric machine according to any one of claims 1 to 7, characterized in that the link arms (40) îo extend transversely with respect to a direction of longitudinal elongation of said holding piece (35).
    [7" id="c-fr-0007]
    9. rotary electric machine according to any one of claims 1 to 8, characterized in that the connecting arms (40) are located inside a junction zone (31) between the two cavities (16).
    10. A rotary electrical machine according to any one of claims 1 to 9, characterized in that the two strips (36) of the holding part (35) are free at their ends.
    1/3
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    同族专利:
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    EP3376639B1|2020-01-01|
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    EP3376639A1|2018-09-19|
    US10505418B2|2019-12-10|
    US20180269736A1|2018-09-20|
    CN108631465A|2018-10-09|
    引用文献:
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    WO2013057673A2|2011-10-17|2013-04-25|Spal Automotive S.R.L.|A rotor for an electrical machine and relative assembly method|
    WO2013175117A1|2012-05-24|2013-11-28|Valeo Equipements Electriques Moteur|Electric machine rotor and associated permanent magnet holding device|
    DE102012016927A1|2012-08-27|2014-02-27|Volkswagen Aktiengesellschaft|Rotor of electric machine e.g. electric motor, has clamping element that is extended along extending direction of permanent magnet in recess such that permanent magnet is partially enclosed by clamping element|
    DE102013206438A1|2013-04-11|2014-10-16|Bühler Motor GmbH|Permanent magnet rotor for an electronically commutated DC motor|
    FR3028360A1|2014-11-12|2016-05-13|Valeo Equip Electr Moteur|MAGNET HOLDING DEVICE FOR ROTOR|
    US5159220A|1990-06-25|1992-10-27|General Electric Company|Realizations of folded magnet AC motors|
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    US8400042B2|2011-06-20|2013-03-19|General Electric Company|Ripple spring|
    DE102013206436A1|2013-04-11|2014-10-16|Wacker Chemie Ag|Cleaning of CVD production rooms|
    CN104682650A|2013-11-28|2015-06-03|德昌电机有限公司|Motor rotor and brushless motor with motor rotor|
    FR3019948B1|2014-04-10|2017-12-22|Moteurs Leroy-Somer|ROTOR OF ELECTRIC ROTATING MACHINE.|DE102017217282B3|2017-09-28|2019-03-28|Bühler Motor GmbH|Permanent magnet rotor, method for its production and magnetization device|
    JP2019161952A|2018-03-15|2019-09-19|本田技研工業株式会社|Rotor of rotary electric machine|
    JP2019161953A|2018-03-15|2019-09-19|本田技研工業株式会社|Rotor of rotary electric machine|
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    法律状态:
    2018-03-29| PLFP| Fee payment|Year of fee payment: 2 |
    2018-09-21| PLSC| Publication of the preliminary search report|Effective date: 20180921 |
    2019-03-29| PLFP| Fee payment|Year of fee payment: 3 |
    2020-03-31| PLFP| Fee payment|Year of fee payment: 4 |
    2021-12-10| ST| Notification of lapse|Effective date: 20211105 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1752089|2017-03-15|
    FR1752089A|FR3064130B1|2017-03-15|2017-03-15|ROTOR OF ROTATING ELECTRIC MACHINE HAVING PERMANENT MAGNET HOLDING PIECES|FR1752089A| FR3064130B1|2017-03-15|2017-03-15|ROTOR OF ROTATING ELECTRIC MACHINE HAVING PERMANENT MAGNET HOLDING PIECES|
    EP18158678.5A| EP3376639B1|2017-03-15|2018-02-26|Rotor of rotary electrical machine provided with parts for holding permanent magnets|
    CN201810208690.8A| CN108631465A|2017-03-15|2018-03-14|It is provided with the rotor of the electric rotating machine of the component for keeping permanent magnet|
    US15/922,108| US10505418B2|2017-03-15|2018-03-15|Rotor of a rotary electrical machine provided with parts for retention of permanent magnets|
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