Stator of electric motor
AssigneeFanuc Corporation
InventorTetsumaru Saitou
Life of this patent
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Abstract
A stator (100) of an electric motor includes a coil (12), a stator core (10) which supports the coil, and covers (22a, 22b) which are attached to the stator core so as to surround coil ends (13a, 13b) of the coil, wherein the covers have outside diameters which are at least partially smaller than the outside diameters of the stator cores, the covers have coefficients of linear expansion which are larger than the coefficient of linear expansion of the stator core, and the covers expand due to heat whereby the covers closely contact the housing which is arranged around the stator.
Claims14
A stator of an electric motor comprising:
- a coil,
- a stator core which supports said coil, and
- covers which are attached to said stator core so as to surround coil ends of said coil which stick out from end faces of the stator core in the axial direction, wherein
- said covers have outside diameters which are at least partially smaller than an outside diameter of said stator core,
- said covers have coefficients of linear expansion which are larger than a coefficient of linear expansion of said stator core, and
- said covers expand by heat whereby said covers are made to closely contact a housing to be arranged around said stator.
A stator of an electric motor comprising:
- a coil,
- a stator core which supports said coil, and
- covers which are attached to said stator core so as to surround coil ends of said coil which stick out from end faces of the stator core in the axial direction, wherein
- said covers have outside diameters which are at least partially smaller than an outside diameter of said stator core,
- said covers have coefficients of linear expansion which are larger than a coefficient of linear expansion of said stator core, and
- said covers expand by heat at the time of operation of the electric motor so that the covers have outside diameters at the distal ends which are equal to the outside diameter of the stator core.
Dependencies are inferred from the claim text.