• 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 present invention relates to an electric machine comprising a rotor (10) and a stator (12) having a multiplicity of radial passages (28) circumferentially disposed along said stator, magnetic flux generators (34) housed in the passages, and a stator bearing (24) receiving the rotor. According to the invention, the radial passages (28) comprise fluid circulation galleries (36) facing the magnetic flux generators (34).
    公开号:FR3041831A1
    申请号:FR1559046
    申请日:2015-09-25
    公开日:2017-03-31
    发明作者:Luca Favre；Davide Bettoni
    申请人:IFP Energies Nouvelles IFPEN；Mavel SRL；
    IPC主号:
    专利说明:

    The present invention relates to a rotating electrical machine comprising a rotor and a stator for the passage of a fluid. Generally, such an electric machine comprises a stator and a rotor arranged coaxially one inside the other.
    The rotor is formed of a rotor body carrying magnetic flux generators, such as permanent magnets or coils.
    This rotor is generally housed inside the stator which carries magnetic flux generators in the form of electric windings (or armature coils) to generate a magnetic field for rotating the rotor in association with the field. Magnetic generated by magnets or rotor windings.
    The stator typically comprises a plurality of radial notches in the rotor direction and extending all the way around the stator. These notches are provided to receive the armature windings which are fixed by any known means.
    It is already known a type of electric machine with a large air gap between the rotor and the stator, or "Air Gap", whose gap can sometimes be several centimeters in order to let a gaseous or liquid fluid through this gap.
    This type of machine is known in particular from patent applications US 2008289333 or US 2013169074 or US 2013043745 for high-speed "Air Gap" synchro-relucting machines operating at low speed, the high air gap of which enables a fluid to flow through it. this.
    However, this strong gap represents a disadvantage to ensure the passage of the magnetic flux between the rotor and the stator and therefore a limitation for the intrinsic efficiency of the machine as well as the size of the stator for the same power delivered.
    The present invention aims to remedy the disadvantages enumerated above through a machine with a low air gap, allowing a better energy conversion between the stator and the rotor, and a fluid passage possible through the machine. To this end, the present invention relates to an electric machine comprising a rotor and a stator comprising a multiplicity of radial passages arranged circumferentially along said stator, magnetic flux generators housed in the passages, and a stator bearing receiving the rotor, characterized in that the radial passages comprise fluid circulation galleries facing the magnetic flux generators.
    The radial passages may be delimited by radial webs, a planar annular outer rim of the stator and the stator bearing.
    The fluid circulation galleries may be delimited by the radial webs, the planar annular outer rim of the stator and the magnetic flux generators.
    The fluid circulation galleries may be delimited by the radial webs, the stator bearing and the magnetic flux generators.
    The sails may have an axial direction substantially parallel to the longitudinal axis of the stator.
    The sails may have an axial direction inclined relative to the longitudinal axis of the stator.
    The sails may have a twist-shaped direction relative to the longitudinal axis of the stator.
    The sails may have, in longitudinal section, an aerodynamic profile.
    The fluid may be a liquid or gaseous cooling fluid for the machine.
    The fluid can be a fluid compatible with the food or petroleum industry or building & public works.
    The other features and advantages of the invention will now appear on reading the following description, given solely by way of illustration and not limitation, and to which are appended: - Figure 1 which is a radial sectional view of the electrical machine according to the invention, - Figure 2 which is a view similar to that of Figure 1 with the course of the magnetic field lines, - Figures 3 and 4 which illustrate different configurations of the stator of the machine of Figure 1 and - Figure 5 which shows a variant of the electric machine of Figure 1.
    The rotary electric machine illustrated in FIG. 1, for example an electric motor, comprises a rotor 10 and a stator 12 which, in the assembled state, are nested one inside the other while being coaxial while leaving the rotor free to rotate.
    This machine is only as an example in the following description a synchronous machine to a pair of poles.
    This does not in any way bypass any other electrical machine, such as asynchronous machines with wound rotor or squirrel cage.
    The rotor of the machine according to FIG. 1 comprises, in a manner known per se, a shaft 14, preferably magnetic, on which is placed a stack of identical flat ferromagnetic plates, which are assembled to one another by any means known to form a rotor body 16.
    This rotor carries magnetic flux generators (not shown), mainly permanent magnets of length substantially equal to the length of the rotor body.
    The stator also comprises a stack of identical flat ferromagnetic plates which are interconnected by any known means to form a tubular stator body 18.
    This stator body comprises a planar annular outer rim 20 (or yoke) and a recessed central portion 22 delimited by a tubular bearing 24 inside which the rotor is housed.
    It is thus formed an air gap E between the outer periphery of the rotor and the inner periphery of the tubular bearing of the stator.
    The stator yoke is connected to the tubular bearing by a multiplicity of radial webs 26 distributed circumferentially regularly, here 12 sails at 30 °, which delimit between them radial passages 28 of substantially triangular shape with the tip of the triangle directed towards the bearing. These passages extend radially from the lower edge 30 of the annular yoke 20 to the outer edge 32 of the bearing and extend axially all along the stator body 18.
    For reasons of simplification in the rest of the description, the sails are referred to as stator teeth.
    As illustrated in FIG. 1, the stator comprises magnetic flux generators, here armature coils 34, preferably liquid-tight, which are housed in the passages 28 and more precisely in the vicinity of the lower edge 30 of the annular bolt. .
    The stator teeth 26 of great length and can distance the windings of the bearing. In addition, as best illustrated in Figure 2, these teeth allow the guide to the rotor 10, the magnetic flux generated by the windings which are remote from the rotor.
    In this way, the size of the gap E is reduced (a few millimeters) which optimizes the efficiency and performance of the machine.
    The axial galleries 36 thus formed between the windings, the outer edge of the bearing and the stator teeth then form a stator grid for passing a fluid, such as a gaseous or liquid fluid.
    This makes it possible to ensure the integration into a gas or fluidic vein of the machine and / or its cooling and therefore an optimized positioning in a given system constrained by the space requirement and / or the thermal clearance.
    In addition, the magnetic characteristics of this machine make it possible to limit the amount of active material for a given level of performance, particularly with respect to a machine with a large gap.
    As illustrated in Figure 3, the teeth 26 constituting the stator grid may have an axial direction substantially parallel to the fluid passing through it, that is to say substantially parallel to the longitudinal axis of the stator, in order to influence the less possible direction of this fluid.
    Also, the axial direction of these teeth may be inclined relative to the longitudinal axis of the stator.
    This direction can also be a complex aerodynamic shape, such as a spiral shape as illustrated in FIG. 4, intended to guide / initiate or stop the movement of the fluid.
    This twist shape makes it possible to increase the contact surface of the teeth with the fluid.
    Moreover, this twisting of the stator teeth may be judicious from a magnetic point of view because it makes it possible to reduce the torque ripple and that according to the angle of inclination.
    These teeth can also have an aerodynamic profile to minimize the pressure drop associated with the passage of the fluid passing through the grid, such as a sectional shape of a drop of water or an airplane wing.
    Surface treatment of the stator makes this machine compatible with the food, petroleum, building & public works and others requiring transport and or guidance of a fluid through an electric machine.
    From the point of view of cooling the machine, this type of machine offers a very high exchange surface at the stator to use a simplified cooling system compared to a conventional electric machine with similar performance and potentially increase the current density in the stator thanks to this optimized cooling.
    It should be noted that this type of machine can in particular be integrated quite simply to replace an existing system.
    The variant of Figure 5 differs from Figure 1 in that the coils 34 are placed in the passages 28 near the bearing 24 and therefore closer to the gap E.
    The galleries 36 for the fluid passage are then located between the coils and the lower edge 30 of the annular bolt 20 of the stator and the webs 26.
    权利要求:
    Claims (9)
    [1" id="c-fr-0001]
    1) An electric machine comprising a rotor (10) and a stator (12) having a multiplicity of radial passages (28) arranged circumferentially along said stator, magnetic flux generators (34) housed in the passages, and a bearing of stator (24) receiving the rotor, characterized in that the radial passages (28) comprise fluid circulation galleries (36) facing the magnetic flux generators (34).
    [0002]
    2) Electrical machine according to claim 1, characterized in that the radial passages (28) are delimited by radial webs (26), a planar annular outer edge (20) of the stator and the stator bearing (24).
    [0003]
    3) An electric machine according to claim 2, characterized in that the fluid circulation galleries (36) are delimited by the radial webs (26), the planar annular outer edge (20) of the stator and the magnetic flux generators (34). ).
    [0004]
    4) Electrical machine according to claim 2, characterized in that the fluid flow galleries (36) are delimited by the radial webs (26), the stator bearing (24) and the magnetic flux generators (34).
    [0005]
    5) Electrical machine according to one of claims 2 to 4, characterized in that the webs (26) have an axial direction substantially parallel to the longitudinal axis of the stator (12).
    [0006]
    6) Electrical machine according to one of claims 2 to 4, characterized in that the webs (26) have an axial direction inclined relative to the longitudinal axis of the stator (12).
    [0007]
    7) Electric machine according to one of claims 2 to 4-, characterized in that the webs (26) have a direction in the form of a twist relative to the longitudinal axis of the Stator (12).
    [0008]
    8) Electrical machine according to one of claims 2 to 7, characterized in that the webs (26) have, in longitudinal section, an aerofoil shaped aircraft wing or drop of water.
    [0009]
    9) Electrical machine according to claim 1, characterized in that the fluid is a liquid or gaseous cooling fluid for the machine.
    类似技术:
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    同族专利:
    公开号 | 公开日
    JP2018528755A|2018-09-27|
    US20180269744A1|2018-09-20|
    CN113098160A|2021-07-09|
    KR20180081705A|2018-07-17|
    JP6883572B2|2021-06-09|
    WO2017050577A1|2017-03-30|
    EP3353879A1|2018-08-01|
    FR3041831B1|2019-04-19|
    CN108370190A|2018-08-03|
    EP3353879B1|2020-05-06|
    US10797556B2|2020-10-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1241773A2|2001-03-14|2002-09-18|Nissan Motor Co., Ltd.|Rotating electrical machine with air-gap sleeve|
    US20030057800A1|2001-09-26|2003-03-27|Daniel Gizaw|Pumping motor with skewed rotor laminations|
    EP1499001A1|2003-07-17|2005-01-19|Jeumont Sa|Cooling arrangement for electrical machines specially for a permanent magnet syncronous machine|
    US20090022610A1|2006-02-23|2009-01-22|Thomas Materne|Motor centrifugal pump|
    US20080042498A1|2006-06-27|2008-02-21|Alexander Beer|Method for manufacturing an electric machine and electric machine manufactured according to said method|
    AT509660A1|2010-03-03|2011-10-15|Fotec Forschungs Und Technologietransfer Gmbh|MAGNETICALLY COUPLED PUMP FOR PUMPING A FLUID MEDIUM|WO2019158330A1|2018-02-16|2019-08-22|IFP Energies Nouvelles|Electric machine having a stator grating comprising aerodynamic appendages|
    WO2019170490A1|2018-03-08|2019-09-12|IFP Energies Nouvelles|Dual-flux electric machine|
    FR3089712A1|2018-12-11|2020-06-12|IFP Energies Nouvelles|Electric machine stator with a crown formed by a plurality of stator segments|
    US10727706B2|2017-09-18|2020-07-28|IFP Energies Nouvelles|Electric machine comprising a stator provided with an inner tubular sleeve|JPS50112907U|1974-02-26|1975-09-13|
    JP3609649B2|1999-06-29|2005-01-12|三洋電機株式会社|Brushless DC motor and refrigerant compressor using this motor|
    JP2001211614A|2000-01-24|2001-08-03|Ishikawajima Harima Heavy Ind Co Ltd|Squirrel-cage induction motor for high-speed revolutions|
    JP3603815B2|2001-06-21|2004-12-22|日産自動車株式会社|Rotating electric machine|
    US7119461B2|2003-03-25|2006-10-10|Pratt & Whitney Canada Corp.|Enhanced thermal conductivity ferrite stator|
    US7190101B2|2003-11-03|2007-03-13|Light Engineering, Inc.|Stator coil arrangement for an axial airgap electric device including low-loss materials|
    DE502007006457D1|2007-05-24|2011-03-24|Lindenmaier Gmbh|turbocharger|
    US20130043745A1|2011-08-16|2013-02-21|Sheikh Nayyer Hussain|Synchronous reluctance motor for conducting media|
    JP5877035B2|2011-10-31|2016-03-02|株式会社ミツバ|Flat wire winding structure|
    US20130169074A1|2011-12-31|2013-07-04|Sheikh Nayyer Hussain|Synchronous relcutance motor for conducting media|
    US9225207B2|2012-08-24|2015-12-29|Mitsubishi Electric Corporation|Rotating electric motor and internal combustion engine supercharger|
    JP2014068495A|2012-09-27|2014-04-17|Hitachi Automotive Systems Ltd|Rotary electric machine and electrically driven power steering device using the same|TR201902757T4|2015-10-05|2019-03-21|Hydro Aluminium Rolled Prod|Aluminum composite material for use in the melting-free thermal bonding method and method for its production.|
    FR3093388B1|2019-02-28|2021-03-12|Nidec Psa Emotors|Rotating electric machine with improved stator cooling|
    FR3101208A1|2019-09-23|2021-03-26|IFP Energies Nouvelles|Hybrid transient magnet rotor|
    EP3965266A1|2020-09-03|2022-03-09|Ningbo Geely Automobile Research & Development Co. Ltd.|Electric machine rotor cooling cartridge|
    法律状态:
    2016-09-22| PLFP| Fee payment|Year of fee payment: 2 |
    2017-03-31| PLSC| Publication of the preliminary search report|Effective date: 20170331 |
    2017-09-14| PLFP| Fee payment|Year of fee payment: 3 |
    2018-09-17| PLFP| Fee payment|Year of fee payment: 4 |
    2019-09-25| PLFP| Fee payment|Year of fee payment: 5 |
    2020-09-28| PLFP| Fee payment|Year of fee payment: 6 |
    2020-10-09| TP| Transmission of property|Owner name: IFP ENERGIES NOUVELLES, FR Effective date: 20200902 |
    2021-09-27| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1559046A|FR3041831B1|2015-09-25|2015-09-25|ROTATING ELECTRIC MACHINE COMPRISING A ROTOR AND A STATOR FOR PASSING A FLUID.|
    FR1559046|2015-09-25|FR1559046A| FR3041831B1|2015-09-25|2015-09-25|ROTATING ELECTRIC MACHINE COMPRISING A ROTOR AND A STATOR FOR PASSING A FLUID.|
    KR1020187008079A| KR20180081705A|2015-09-25|2016-09-07|A rotary electric machine comprising a rotor and a stator for passing fluid therethrough|
    US15/761,296| US10797556B2|2015-09-25|2016-09-07|Rotary electric machine comprising a rotor and a stator for the passage of a fluid|
    CN202110403672.7A| CN113098160A|2015-09-25|2016-09-07|Rotating electrical machine comprising a stator and a rotor for the passage of a fluid|
    CN201680055471.XA| CN108370190A|2015-09-25|2016-09-07|It include the electric rotating machine of the stator and rotor that pass through for fluid|
    JP2018515883A| JP6883572B2|2015-09-25|2016-09-07|A rotating electric machine with a rotor and a stator for the passage of fluid|
    EP16760756.3A| EP3353879B1|2015-09-25|2016-09-07|Electrical rotating machine comprising a rotor and a stator for the passage of a fluid|
    PCT/EP2016/071095| WO2017050577A1|2015-09-25|2016-09-07|Electrical rotating machine comprising a rotor and a stator for the passage of a fluid|
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