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Generator Motor Wedge With Wide Arm Span and Reduced Stress Levels

  • US 20160105058A1
  • Filed: 10/13/2014
  • Published: 04/14/2016
  • Est. Priority Date: 10/13/2014
  • Status: Active Grant
First Claim
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1. A wedge for use in an electric machine comprising:

  • a central leg extending in a direction that will be radially inward when the wedge is mounted on a lamination stack, and said wedge having arms extending in both circumferential directions from said central leg, with a circumferentially outermost part of said arms having a curved contact surface that will be radially outward, and a flat inner surface that will be radially inward when the wedge in mounted in the lamination stack;

    said wedge having a radially outer full surface defining a cylindrical aperture through an axial length of said full surface, and ledge surfaces at each axial end of said full surface of said wedge; and

    a curved merging portion on an outer surface of said arms merging into said curved contact surface, said curved merging portion being formed on a radius of curvature centered from a point that will be spaced radially outwardly of said arm when said wedge is mounted on a lamination stack, and said curved contact portion being formed about a radius of curvature centered on a point that will be spaced radially inwardly of said curved contact surface when the wedge is mounted on a lamination stack.

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