Electromagnetic rotary machine comprising an electromagnetic bearing
    81.
    发明公开
    Electromagnetic rotary machine comprising an electromagnetic bearing 失效
    具有电磁轴承电磁旋转机

    公开(公告)号:EP0726638A3

    公开(公告)日:1997-02-05

    申请号:EP96300865.1

    申请日:1996-02-08

    IPC分类号: H02K17/32 H02K7/09 H02K17/16

    摘要: An electromagnetic rotary machine includes a rotor (50) capable of high speed rotation. The electromagnetic rotary machine is driven by electromagnetic induction between the rotor (50) and a stator including a stator core and stator windings wound around the stator core. The electromagnetic rotary machine further includes position control windings wound around the stator core, and cage conductors (54) mounted to the rotor core (52). The number of poles of the position control windings is different from the number of poles of the stator windings. This difference causes at least either a radial magnetic force or an axial magnetic force to be exerted on the rotor (50). With divided end rings (56, 58), the cage conductors (54) form closed circuits with zero mutual inductance between the cage conductors (54) and the position control windings. For example, the stator includes torque generating four-pole stator windings and two-pole position control windings. The rotor (50) indudes four-pole windings with particular conductors (54) being short-circuited by circumferentially divided end rings (56, 58).

    Brazing copper end rings and bars in an induction motor rotor by induction heating
    82.
    发明公开
    Brazing copper end rings and bars in an induction motor rotor by induction heating 失效
    Hartlötenvon Kupferendringen undKupferstäbenin Rotoren von Induktionsmotoren mittelsInduktionserwärmung

    公开(公告)号:EP0744812A2

    公开(公告)日:1996-11-27

    申请号:EP96201188.8

    申请日:1996-04-29

    IPC分类号: H02K17/16

    CPC分类号: H02K17/165 H02K15/0012

    摘要: An induction motor rotor is manufactured by assembling copper end ring laminations 30, 35 on each axial end of a core assembly 15 with slots 20, 34 aligned and copper rotor bars 40 in the slots and induction brazing the ends of the copper bars to the copper end ring laminations. The forming of the end rings by laminations greatly reduces machining and scrap; and the use of induction heating reduces exposure of the core assembly to the high heat of brazing.

    摘要翻译: 感应电动机转子通过在芯组件15的每个轴向端部上组装铜端环叠片30,35,其中缝隙20,34对齐,铜转子条40在槽中并且将铜棒的端部钎焊到铜 端环叠片。 通过叠片形成端环大大减少了加工和废料; 并且使用感应加热减少了芯组件暴露于高的钎焊热。

    CAGE ROTOR FOR HIGH-SPEED INDUCTION MOTOR.
    84.
    发明公开
    CAGE ROTOR FOR HIGH-SPEED INDUCTION MOTOR. 失效
    笼型转子异步电机上高速行驶。

    公开(公告)号:EP0618662A4

    公开(公告)日:1995-03-29

    申请号:EP93919677

    申请日:1993-09-17

    申请人: FANUC LTD

    IPC分类号: H02K17/16

    CPC分类号: H02K17/165 Y10T29/49012

    摘要: A cage rotor (10) comprises a laminated core (14) fixed to a rotor shaft (12); a secondary conductor (18) arranged in a plurality of through holes (16) made through the laminated core (14); a pair of end rings (20) connected to the secondary conductor (18) at both ends of the laminated core (14) in the axial direction; and a pair of reinforcing members (22 and 23) covering the end rings (20) respectively. The secondary conductor (18) and end rings (20) are integrally formed by casting, and connected to the laminated core (14) and reinforcing members (22 and 23). The reinforcing members (22 and 23) are made up of annular elements made of a highly rigid material, and are provided with the cylindrical walls (26 and 27) enclosing the cylindrical outer periphery of the end rings (20), and the multi-hole walls (28 and 29) sandwiched between the respective end rings (20) and the laminated core and having a plurality of holes (32) communicating with the through holes (16) of the laminated core (14), and end walls (30 and 31) which contact with the outer ends of the end rings (20) in the axial direction.

    Rotor construction in an asynchronous electric machine
    85.
    发明公开
    Rotor construction in an asynchronous electric machine 失效
    Rotorkonstruktion einer elektrischen Asynchronmaschine。

    公开(公告)号:EP0638983A1

    公开(公告)日:1995-02-15

    申请号:EP94401275.6

    申请日:1994-06-08

    IPC分类号: H02K17/16 H02K1/22 H02K1/28

    CPC分类号: H02K17/165

    摘要: The rotor construction (2) comprises substantially adjacent to the stator (1) of the asynchronous electric machine an electrically conductive conductor construction (6) associated with a rotor shaft (4). A coating layer (7) consisting of ferromagnetic particulate matter of an electric conductivity lower than that of the conductor construction is placed on the surface of the rotor shaft (4). The coating layer (7) comprises an electrically insulating coating on the surface of a part of the ferromagnetic matter. The conductor construction (6) is substantially associated with the coating layer (7). Further there is an intermediate layer (9), having a lower yield point than that of the coating layer (7) between the coating layer and the shaft (2).

    摘要翻译: 转子结构(2)基本上与异步电机的定子(1)相邻,与转子轴(4)相关联的导电导体结构(6)。 由电导率低于导体结构的铁磁颗粒物构成的涂层(7)被放置在转子轴(4)的表面上。 涂层(7)在铁磁性物质的一部分的表面上包括电绝缘涂层。 导体结构(6)基本上与涂层(7)相关联。 此外,存在中间层(9),其具有比涂覆层和轴(2)之间的涂层(7)的屈服点更低的屈服点。

    Rotor of induction motor
    88.
    发明公开
    Rotor of induction motor 失效
    电机转子

    公开(公告)号:EP0265868A3

    公开(公告)日:1989-08-09

    申请号:EP87115576.8

    申请日:1987-10-23

    申请人: HITACHI, LTD.

    IPC分类号: H02K17/16

    CPC分类号: H02K17/16

    摘要: A rotor of an induction motor comprising a rotary shaft (6), a cylindrical rotor core (7) fixedly secured on the rotary shaft, a conductive cover (8) fixed on the outer circumferential surface of the rotor core, the conductive cover being formed of a composite material of magnetic material (12) and electrically highly conductive material (13) to have a circumferential permeability smaller than a radial permeability, and a magnetic skin (9) made of a magnetic material and provided on the outer circumferential surface of the conductive cover (8), the magnetic skin having a circumferential permeability (µʹ ϑ ) and an electrical conductivity (ρʹ) which are set to be larger than the circumferential permeability (µ ϑ ) and an electrical resistivity (ρ) of the conductive cover, respectively, whereby a loss due to a spatial higher harmonics magnetic flux of higher order generated by a pulsating magnetic flux (φ S ) at slots in a stator (1) of induction motor can be prevented.