• 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:
    Rotor (2) rotating electrical machine, comprising: - a plurality of stacked sheets, respectively packets of sheets (9) stacked, each sheet, respectively each pack of sheets (9), having a hub (11) and an alternation of polar parts (13) connected to the hub (11) and non-floating and recesses (16), the sheets, respectively the bundles of sheets (9), being angularly offset so that: - the non-floating polar parts (13) ) of a sheet, respectively of a bundle of sheets (9), are superimposed on the recesses (16) of a consecutive sheet, respectively of a consecutive bundle of sheets (9), and - the recesses (16) of a sheet, respectively a bundle of sheets (9), are superimposed on the pole portions (13) of said consecutive sheet, respectively of said consecutive bundle of sheets (9), - holding rods (26) engaged through the non-floating polar parts (13), - floating polar parts (17) enga on the retaining rods (26) and arranged in the recesses (16) between the non-floating polar parts (13) of a metal sheet, respectively a bundle of sheets (9), and - permanent magnets (18). arranged between the non-floating polar parts (13) and the floating polar parts (17),
    公开号:FR3018009A1
    申请号:FR1451592
    申请日:2014-02-27
    公开日:2015-08-28
    发明作者:Jacques Saint-Michel
    申请人:Moteurs Leroy Somer SA；
    IPC主号:
    专利说明:

    [0001] The subject of the present invention is rotor of a rotating electrical machine as well as a rotary electric machine comprising such a rotor. Patent EP 0 641 059 discloses a rotary electric machine rotor comprising first packets of floating sheets and second packets of sheets ensuring the mechanical cohesion of the rotor. Stems are introduced through the sheets so as to maintain the whole. The number of sheets of the second packets is relatively small compared to the number of sheets of the first packs, so that the rods are not maintained by the sheets of the second packets over a large part of their length. Such a machine is not adapted to rotate at high speeds.
    [0002] The object of the invention is to provide a rotating electric machine rotor which is of simple manufacture and which has improved mechanical strength, especially at high rotational speeds of the rotor. The invention responds to this need, according to its first aspect, thanks to a rotor of a rotating electrical machine, comprising: a plurality of stacked sheets, respectively packets of stacked sheets, each sheet, respectively each pack of sheets, comprising a hub and an alternation of polar parts connected to the hub (ie non-floating) and recesses, the sheets, respectively the packets of sheets, being angularly offset so that: the pole parts connected to the hub of a sheet, respectively of a bundle of sheets, are superimposed on the recesses of a consecutive sheet metal, respectively of a consecutive bundle of sheets, and the recesses of a sheet metal or sheet bundle are superimposed on the pole parts connected to the hub of said sheet metal consecutive, respectively said consecutive plate stack, holding rods engaged through the polar parts, floating polar parts engaged on the retaining rods and arranged in the recesses between the pole parts connected to the hub of a sheet, respectively a pack of sheets, and permanent magnets arranged between the pole parts connected to the hub and the floating polar parts. According to the invention, each sheet, respectively each T - ct of sheets, comprises non-floating polar parts through which the holding rods are engaged, so that the number of support points of the rods on the non-polar parts floating is considerably increased compared to the machine according to patent EP 0 641 059, ss which only this. they packs of sheets provide points of support for the stems. Thus, the cohesion of the machine is improved, and the resistance to centrifugal forces is better. Once the sheets are assembled, there is on the rotor an alternation of non-floating polar parts made in one piece with the sheets and separate floating polar parts of said sheets. Thanks to the invention, the rods can be held regularly and securely by the non-floating polar parts, these non-floating polar parts serving as embedding and thus promoting the maintenance of the rods floating polar parts.
    [0003] Each polar part, flo. you or not, can be formed by a single sheet. In this case, the rotor comprises, in the axial direction, one-piece plates comprising a plurality of non-floating polar parts formed with the hub, which are alternately angularly offset, floating polar parts being arranged in the spaces left vacant between the non-floating polar parts. of these sheets.
    [0004] However, preferably, the sheets are grouped in packets. Thus, a non-floating polar portion has a thickness corresponding to the number of superposed sheets. The floating polar parts are also advantageously formed by packets of stacked sheets.
    [0005] The rotor may comprise N poles, for example four, six, eight, ten, twelve, fourteen or sixteen poles. Two consecutive sheets, defining the non-floating polar portions, respectively two consecutive bundles of sheets, can be angularly offset by an angle equal to 360 ° / N.
    [0006] Each aforementioned recess can receive a single p. floating polar. The magnets can be arranged radially between the floating and non-floating polar parts. The rotor obtained can be a flux concentration rotor. The magnets may have a trapezoidal section, taken perpendicular to the axis of rotation, having convergent radial edges as one moves away from the axis 10 of the rotor. Such a trapezoidal section allows the magnets to be held on the rotor by a wedge effect between the polar portions. and not floating. Each magnet can be made in one piece or, alternatively, comprise several pieces of magnets disposed successively axially and / or radially. Alternatively, the magnets may have a recular section. Floating and non-floating polar portions may have retention lugs configured to hold the magnets in place against the centrifugal force induced by rotation of the rotor. The use of magnetically arranged pieces of magnet arranged successively in the radial direction makes it possible to mechanically relieve the retention spouts, while pieces of magnets serve to support other pieces of magnets. Each recess formed between two non-floating polar parts may contain at least partially, in the circumferential direction, a first permanent magnet, a floating polar part and a second permanent magnet, the magnets having poles of the same polarity facing the floating part. The dimensions of the recesses, floating polar parts and magnets may be such that the magnets are received without lateral play in said recesses, one-hundred times the pole portions mounted in the recesses and before introduction of the retaining rods. Alternatively, the magnets are received with a lateral clearance in the recesses, once the floating polar parts mounted and before introduction of the retaining rods, this clearance being for example greater than or equal to 0.2 mm. Each pack of sheets can have between 10 and 500, between 50 and 150 sheets. Each sheet may comprise radial arms connecting the hub to the non-floating polar parts, the latter being regularly arranged around the hub.
    [0007] The floating and non-floating polar parts may be of substantially the same size. Openings may be provided between the floating polar parts and the hub. These openings are preferably of greater angular extent than the extent of a pole. The openings may be delimited circumferentially by the arms connecting the non-floating polar parts to the hub. The openings may have rounded end edges, for example semi-circular, connected by concentric arcs centered on the axis of rotation. The angular spacing between the circumferential ends of an aperture is preferably greater than the angular spacing between the radially inner ends of two adjacent magnets. The interest of the openings is to facilitate the ventilation of the rotor and reduce losses by looping the magnetic flux of a magnet through the hub. Thus, the shaft on which the hub is engaged can be magnetic, which makes it less expensive than a non-magnetic shaft. The quinconage of the sheets, or bundles of sheets, can leave axial ventilation channels, formed by the superposition of the openings.
    [0008] The floating and floating polar parts may each comprise a hole for passing rods substantially of the same shape, so that each holding rod is alternately received in t, n t- or fle polar part. te and in hole of a polar part not floating.
    [0009] When the magnets are received in the recesses formed between the non-floating polar parts with side play, the holes of the floating polar parts and p. The non-floating poles may be slightly angularly offset relative to the same reference direction before the introduction of the holding rods. This introduction causes the alignment of the holes and the appearance of a torque of the permanent magnets between the polar parts flo. you and not. your. The hole in each non-polar polar part. For example, it is arranged such that the radius passing through the center of said hole and the radius dividing the non-floating polar portion into two halves define a first angle and each hole in a floating polar portion may be arranged such that the radius passing through the center of said hole and the radius dividing the floating polar portion into two halves define a second angle, different from the first angle. The difference between the first and second angles may be sufficient so that, when the holding rods are introduced into the holes, the side clearances are canceled by angular sliding of the consecutive sheets, respectively consecutive packets of sheets. The dispersion of the games can be compensated by the elasticity of the sheets and holding rods. The invention further relates, in another of its aspects, to a rotating electrical machine, comprising: rotor as defined above, and stator interacting with the rotor.
    [0010] The rotor is preferably configured for use in an internal rotor rotating electrical machine but alternatively may be used in an external rotor rotating electrical machine.
    [0011] The machine is preferably a radial induction flux machine. Alternatively, it may be an axial induction flow machine. The machine can be a motor, n generator, being for example a polyphase machine, in particular three-phase.
    [0012] The machine is for example configured to operate at a rated power of between 10 and 2000 kW. The invention will be better understood on reading the following description, non-limiting examples of implementation thereof, and on examining the appended drawing, in which: FIG. According to a first exemplary embodiment of the invention, FIGS. 2 and 3 are transverse sections of FIGS. 2a and 3b are cross sections of FIGS. schematically, vr, - permanent magnet variant. FIG. 1 shows a rotor 2 of a rotating electrical machine 1 according to an embodiment of the invention. The rotor 2 of this machine can rotate inside a stator 3 as shown in FIGS. 2 or 3, comprising a magnetic carcass 4 having a plurality of teeth 5. The stator 3 is preferably wound on teeth, but could alternatively be distributed winding. The stator 3 is preferably three-phase. Although the machine 1 is shown as being an internal rotor machine, it could, in variant -n shown, be external rotor. The rotor 2 comprises a plurality of packets of magnetic sheets 9 stacked along the axis of rotation X of the rotor 2, between two end flanges 10 made of non-magnetic material. In a variant not illustrated, these cheeks 10 may be replaced by crosses, including as many branches as non-floating polar parts, which can then be magnetic. Stems 26 connect the cheeks 10 while maintaining in axial compression the stack.
    [0013] As shown in FIG. 1, each of the plates 9 of the rotor comprises a hub 11 providing a passage for the rotor shaft, not shown, and a plurality of non-floating polar portions 13 projecting radially outwardly from the hub 11. In the example illustrated, the rotor comprises eight poles and each packet of plates 9 has four polar parts 13 distributed uniformly around the periphery of the hub 11.
    [0014] Each pole portion 13 is connected to the hub 1 by an arm 14 less wide than the corresponding pole portion 13. In the example of Figure 2, arm 14 is of constant width and has straight edges 20. In the example of FIG. 3, each arm 14 has concave, semicircular edges 20. As can be seen in FIGS. 1 to 3, each non-floating polar portion 13 may have opposing edges 12 diverging as one moves away from the X axis of the rotor. Two consecutive polar portions 13 of the same bundle of sheets 9 define between them a recess 16 which extends in the example described from the hub 11 to the gap E of the machine. 1, see FIGS. 1 to 3, separate float portions 17 of the sheet packs 9 and permanent magnets 18 are received in each recess 16. Each recess 16 may receive a floating polar portion 17 flanked by two magnets 18. In the example shown, the magnets 18 are arranged radially, with circumferentially oriented magnetization. The rotors of the examples of FIGS. 1 to 3 comprise, for example, as illustrated, four North and four South poles.
    [0015] The floating polar parts 17 and the magnets 18, when arranged in the recesses 16, remain at a distance from the hub 11, an aperture V extending between two adjacent arms 14. Once the magnets 18 and the pole pieces 17 are arranged in the recesses, the radially inner edges of the non-flo polar parts 13, the floating polar parts 17 and the magnets 18 may be located at the same distance from the X axis of the rotor. In the examples of Figures 1 and 2, the magnets have a trapezoidal section, that is to say that their width, measured between two radial edges 19, decreases when moving away from the X axis of the rotor. The magnets 18 shown in Figure 2 are made in one piece, but in the variant shown in Figure 4, several pieces of magnets 18a, 18b and 18e are successively arranged radially, when one moves away from the X axis of the rotor. In the example of Figure 3, the magnets 18 are of rectangular section and retaining nozzles 22 are provided on the edges opposite p. 17 and 13, so as to hold the magnets 18 in place against the centrifugal force. The radially outer edge of the pole portions may be of radius of curvature less than the half-diameter of the rotor, so as to reduce the torque ripples. As shown in Figures 1 to 3, the pole portions 13 and 17 may extend an angular distance about the substantially equal axis X.
    [0016] Each pole portion 13, respectively 17, may comprise as illustrated a through hole 24, respectively 25, which is for example of circular shape. These holes 24 and 25 are able to receive holding rods 26, visible in FIG. 1. The holes 24 and 25 may be formed in the polar parts 13 and 17 so that they are exactly superimposed when all the plates of the rotor are assembled. Alternatively, as shown in FIG. 2, each hole 24 may be arranged in such a way that the angle formed between the radius passing through the center of the hole 24 and the median radius dividing the corresponding polar portion 13. the two halves are different from the angle p defined between the radius passing through the center of the hole 25 and the median radius dividing the corresponding pole portion 17 into two halves. The angle may be zero, contrary to the angle p, or vice versa. Alternatively the angles a and 3 are both non and have different values.
    [0017] We will now describe the manner in which the laminations 9 are assembled. Each sheet package comprises for example between 50 and 150 sheets. Sheets belonging to the same bundle of sheets 9 have the same orientation, that is to say that the pole portions 13 of all these sheets are superimposed and the recesses 16 of these sheets are also superimposed. Two consecutive bundles of plates 9 are angularly offset so that the pole portions 13 of a bundle of sheets are superimposed on the recesses 16 of the consecutive sheet metal bundle and the recesses 16 of said bundle of sheets are superimposed on the recesses 16 of the bundle of plates. consecutive sheets. Thus, along one pole, there is alternating polar portions 13 and 17. In a variant not illustrated, a sheet of packets is replaced by only one sheet, so that two consecutive sheets are angularly offset. In the examples of FIGS. 1 to 3, two consecutive bundles of plates are shifted by 360 ° / N, where N is the number of poles of the machine. During manufacture, after stacking the plate bundles, the holes 24 and 25 coincide exactly over the entire length of the rotor.
    [0018] Alternatively, a lateral clearance between the edges 19 of each permanent magnet 18 and the radial edges facing the pole portions 13 and 17 may remain when the magnets 18 and the floating polar parts 17 are in place in the recesses 16. In this case the holes 24 and 25 may not be aligned from one lamina to another and the X-axis insertion of the rods 26 may allow the holes 24 and 25 to be aligned.
    [0019] The introduction of the rods 26 causes an angular sliding of the packs of sheets, with respect to each other, which causes the cancellation of the side clearances between each permanent magnet 18 and the radial edges of the pole portions 13 and 17. Each permanent magnet 18 can then come into contact with these radial edges, so as to induce a tightening IO magnets 18 between these radial edges. The sheets and / or the rods 26 are for example arranged to be sufficiently elastic to compensate for the dispersion of the lateral games. The invention is not limited to the examples which have just been described. For example, the number of poles of the machine may be different.
    权利要求:
    Claims (17)
    [0001]
    REVENDICATIONS1. Rotor (2) rotating electrical machine (I), comprising: a plurality of stacked sheets, respectively stacked sheets of packets (9), each sheet, respectively each pack of sheets (9), having a hub (11) and a alternating polar parts (13) connected to the hub (11) and non-floating and recesses (16), the sheets, respectively the bundles of sheets (9), being angularly offset so that: the non-floating polar parts ( 13) of a sheet metal, respectively a bundle of sheets (9), are superimposed on the recesses (16) of a consecutive sheet, respectively of a consecutive bundle of sheets (9), and the recesses (16) of a sheet metal, respectively a bundle of sheets (9), are superimposed on the pole portions (13) of said consecutive sheet, respectively of said consecutive bundle of sheets (9), holding rods (26) engaged through the parts non-floating poles (13), floating polar parts (17) engaged on the retaining rods (26) and arranged in the recesses (16) between the non-floating polar plates (13) of a sheet metal or a plate package (9), and permanent magnets (18) arranged between the non-floating polar parts (13) and the floating polar parts (17).
    [0002]
    2. Rotor according to claim 1, comprising N poles, two consecutive sheets (9), respectively two consecutive bundles of plates, being angularly offset by an angle equal to 360 ° / N.
    [0003]
    3. Rotor according to one of the preceding claims, each recess (16) receiving a single floating polar part (17).
    [0004]
    4. Rotor according to claim 3, the magnets (18) being arranged radially between the floating polar parts (17) and non-floating (13).
    [0005]
    5. Rotor according to claim 4, the magnets (18) having a trapezoidal section, having radial edges (19) converging as one moves away from the axis (X) of the rotor.
    [0006]
    6. Rotor according to claim 5, each magnet (18) comprising a plurality of pieces (18a, 18b, 18c) of magnets disposed successively axially and / or radially.
    [0007]
    7. Rotor according to claim 4, the magnets (18) having a rectangular section.
    [0008]
    8. Rotor according to any one of claims 4 to 7, the non-floating polar parts (13) and / or p. floating poles (17) having retainer noses (22) configured to hold the magnets (18) in place against centrifugal force induced by rotation of the rotor.
    [0009]
    9. Rotor according to any one of the preceding claims, each recess (16) formed between two non-floating polar parts (13) at least partially containing, in the circumferential direction a first permanent magnet (18), a floating polar part (17). and a second permanent magnet (18), the magnets (18) having poles of the same polarity facing the non-polar floating portion (17).
    [0010]
    10. Rotor according to any one of the preceding claims, each pack of sheets (9) having between 10 and 500 sheets.
    [0011]
    11. Rotor according to any one of the preceding claims, each sheet comprises radial arms (14) connecting the hub (11) to the non-floating polar parts (13) regularly arranged around the hub (11).
    [0012]
    12. Rotor according to any one of the preceding claims, the non-floating polar parts (13) and the floating polar parts (17) being substantially of the same size.
    [0013]
    13. Rotor according to any one of the preceding claims, openings (V) being formed between the floating polar parts (17) and the hub (11).
    [0014]
    14. Rotor according to any one of the preceding claims, the pole parts (13) and the pole pieces (17) comprising at least one hole (24, 25) for passage 5 rods (26), substantially of the same shape, of in such a way that each holding rod (26) is alternately received in a hole (24) of a non-floating polar part (13) and in a hole (25) of a floating polar part (17).
    [0015]
    15. Rotor according to any one of the preceding claims, the magnets (18) being received with a lateral play in the recesses (16) once the floating polar parts (17) r --- --- itées in the recesses and before introduction of the holding rods (26).
    [0016]
    16. Rotor according to claims 14 and 15, the holes (24) of the non-floating polar parts (13) and the holes (25) of the floating polar parts (17), being slightly angularly offset with respect to the same reference direction before the insertion of the holding rods (26), this introduction of said rods causing the alignment of the holes (24) of the non-flo polar portions. (13) and holes (25) of the floating pole portions (17) of consecutive sheets, respectively consecutive bundles of sheets (9).
    [0017]
    17. A rotary electric machine (1) comprising - a rotor (2) according to any one of the preceding claims and - a stator (3) interacting with the rotor (2).
    类似技术:
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    FR2969409A1|2012-06-22|ROTATING ELECTRIC MACHINE HOMOPOLAR STRUCTURE DITE DOUBLE.
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    FR3054745A1|2018-02-02|ROTATING ELECTRIC MACHINE HAVING AN INTERCHARGER WITH A NUT HOOK
    WO2013124787A1|2013-08-29|Rotor of a rotating machine with flux concentration
    FR3024608A1|2016-02-05|INDUCTOR OF ROTATING ELECTRICAL MACHINE WITH IMPROVED MAGNETIC PERFORMANCE
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    WO2011033467A2|2011-03-24|Rotor of an asynchronous machine
    FR3083651A1|2020-01-10|STATOR COIL FOR A ROTATING ELECTRIC MACHINE
    同族专利:
    公开号 | 公开日
    FR3018009B1|2017-10-20|
    WO2015128782A1|2015-09-03|
    EP3111537A1|2017-01-04|
    CN106068599A|2016-11-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB1552694A|1975-05-30|1979-09-19|Cem Comp Electro Mec|Synchronous motors|
    US4437325A|1979-09-21|1984-03-20|General Electric Company|Laundry machine|
    DE10345417A1|2003-09-30|2005-05-12|Minebea Co Ltd|Permanent magnet rotor for electric motor has magnets in rotor connected together in pairs at their inner ends by auxiliary magnets|
    DE102007024406A1|2007-05-25|2008-11-27|Robert Bosch Gmbh|Rotor arrangement for an electric motor|
    EP2626975A2|2012-02-10|2013-08-14|Samsung Electro-Mechanics Co., Ltd|Rotor assembly for motor and manufacturing method thereof|EP3413440A1|2017-06-06|2018-12-12|GE Renewable Technologies Wind B.V.|Magnet module and electrical machine|
    WO2021191073A1|2020-03-24|2021-09-30|Delta Dore|Structure of a magnetic flux concentrator for a rotor for a brushless dc motor|US4327302A|1979-09-21|1982-04-27|General Electric Company|Electronically commutated motor, stationary and rotatable assemblies therefore, and lamination|
    JP3224890B2|1993-02-15|2001-11-05|ファナック株式会社|Synchronous motor rotor|
    CA2670322C|2006-11-27|2011-02-22|Honda Motor Co., Ltd.|Device for producing ring core, method for producing ring core and ring core produced by that method|
    CN102111025B|2009-12-25|2013-03-27|中山大洋电机股份有限公司|Permanent magnet rotor of electric motor|CN109983652B|2016-11-30|2021-06-25|日本电产株式会社|Rotor, motor, and method for manufacturing rotor|
    JP2020088988A|2018-11-20|2020-06-04|日本電産株式会社|Rotor and motor|
    JP2020088987A|2018-11-20|2020-06-04|日本電産株式会社|Rotor and motor|
    法律状态:
    2016-01-29| PLFP| Fee payment|Year of fee payment: 3 |
    2017-01-31| PLFP| Fee payment|Year of fee payment: 4 |
    2018-01-30| PLFP| Fee payment|Year of fee payment: 5 |
    2019-10-25| ST| Notification of lapse|Effective date: 20191006 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1451592A|FR3018009B1|2014-02-27|2014-02-27|ROTOR OF ROTATING ELECTRIC MACHINE|FR1451592A| FR3018009B1|2014-02-27|2014-02-27|ROTOR OF ROTATING ELECTRIC MACHINE|
    PCT/IB2015/051271| WO2015128782A1|2014-02-27|2015-02-19|Rotary electric machine rotor|
    EP15711293.9A| EP3111537A1|2014-02-27|2015-02-19|Rotary electric machine rotor|
    CN201580011173.6A| CN106068599A|2014-02-27|2015-02-19|Rotary motor rotor|
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