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Electric motor with high power and high rotational speed

  • US 5,495,133 A
  • Filed: 01/31/1994
  • Issued: 02/27/1996
  • Est. Priority Date: 01/26/1993
  • Status: Expired due to Term
First Claim
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1. An improved rotor for use in an electric motor capable of operating at high rotational speeds, the rotor being sized and shaped for cooperation with a stator and being supported for rotation about an axis relative to the stator, said rotor comprising:

  • a shaft, said shaft defining the axis of rotation of the rotor;

    an armature core mounted on said shaft for rotation therewith, said core including a pair of oppositely disposed end rings, said end rings being comprised of electrically conductive material, each of said end rings being provided with an array of apertures therein; and

    a plurality of electrically conductive bars extending through said armature core between said end rings, said bars and core cooperating to define a squirrel cage-type rotor, said bars each having an axis and oppositely disposed end portions, said bar end portions each being received in a said aperture in a said end ring, said end portions of said bars being sized and shaped to permit movement thereof relative to said end rings while maintaining electrical contact between said bars and the walls of said apertures in said end rings, said bars being arranged with their axes generally parallel to the axis of said shaft, said bars being affixed to said core at points located intermediate said end rings.

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